diff options
Diffstat (limited to 'lib/ssl/doc')
| -rw-r--r-- | lib/ssl/doc/src/Makefile | 4 | ||||
| -rw-r--r-- | lib/ssl/doc/src/book.xml | 3 | ||||
| -rw-r--r-- | lib/ssl/doc/src/create_certs.xml | 148 | ||||
| -rw-r--r-- | lib/ssl/doc/src/insidecover.xml | 14 | ||||
| -rw-r--r-- | lib/ssl/doc/src/licenses.xml | 156 | ||||
| -rw-r--r-- | lib/ssl/doc/src/make.dep | 30 | ||||
| -rw-r--r-- | lib/ssl/doc/src/new_ssl.xml | 681 | ||||
| -rw-r--r-- | lib/ssl/doc/src/notes.xml | 88 | ||||
| -rw-r--r-- | lib/ssl/doc/src/old_ssl.xml | 709 | ||||
| -rw-r--r-- | lib/ssl/doc/src/refman.xml | 9 | ||||
| -rw-r--r-- | lib/ssl/doc/src/ssl.xml | 986 | ||||
| -rw-r--r-- | lib/ssl/doc/src/ssl_app.xml | 159 | ||||
| -rw-r--r-- | lib/ssl/doc/src/ssl_distribution.xml | 8 | ||||
| -rw-r--r-- | lib/ssl/doc/src/ssl_protocol.xml | 431 | ||||
| -rw-r--r-- | lib/ssl/doc/src/ssl_session_cache_api.xml | 158 | ||||
| -rw-r--r-- | lib/ssl/doc/src/usersguide.xml | 22 | ||||
| -rw-r--r-- | lib/ssl/doc/src/using_ssl.xml | 202 |
17 files changed, 1708 insertions, 2100 deletions
diff --git a/lib/ssl/doc/src/Makefile b/lib/ssl/doc/src/Makefile index fa263d28ab..3119d37af0 100644 --- a/lib/ssl/doc/src/Makefile +++ b/lib/ssl/doc/src/Makefile @@ -37,7 +37,7 @@ RELSYSDIR = $(RELEASE_PATH)/lib/$(APPLICATION)-$(VSN) # Target Specs # ---------------------------------------------------- XML_APPLICATION_FILES = refman.xml -XML_REF3_FILES = ssl.xml new_ssl.xml +XML_REF3_FILES = ssl.xml old_ssl.xml ssl_session_cache_api.xml XML_REF6_FILES = ssl_app.xml XML_PART_FILES = release_notes.xml usersguide.xml @@ -45,9 +45,7 @@ XML_CHAPTER_FILES = \ ssl_protocol.xml \ using_ssl.xml \ pkix_certs.xml \ - create_certs.xml \ ssl_distribution.xml \ - licenses.xml \ notes.xml BOOK_FILES = book.xml diff --git a/lib/ssl/doc/src/book.xml b/lib/ssl/doc/src/book.xml index 9122addb74..85d6b56b26 100644 --- a/lib/ssl/doc/src/book.xml +++ b/lib/ssl/doc/src/book.xml @@ -28,9 +28,6 @@ <rev>A</rev> <file>book.sgml</file> </header> - <insidecover> - <include file="insidecover"></include> - </insidecover> <pagetext>SSL Application</pagetext> <preamble> <contents level="2"></contents> diff --git a/lib/ssl/doc/src/create_certs.xml b/lib/ssl/doc/src/create_certs.xml deleted file mode 100644 index 79cc8a0537..0000000000 --- a/lib/ssl/doc/src/create_certs.xml +++ /dev/null @@ -1,148 +0,0 @@ -<?xml version="1.0" encoding="latin1" ?> -<!DOCTYPE chapter SYSTEM "chapter.dtd"> - -<chapter> - <header> - <copyright> - <year>2003</year><year>2009</year> - <holder>Ericsson AB. All Rights Reserved.</holder> - </copyright> - <legalnotice> - The contents of this file are subject to the Erlang Public License, - Version 1.1, (the "License"); you may not use this file except in - compliance with the License. You should have received a copy of the - Erlang Public License along with this software. If not, it can be - retrieved online at http://www.erlang.org/. - - Software distributed under the License is distributed on an "AS IS" - basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See - the License for the specific language governing rights and limitations - under the License. - - </legalnotice> - - <title>Creating Certificates</title> - <prepared>UAB/F/P Peter Högfeldt</prepared> - <docno></docno> - <date>2003-06-16</date> - <rev>A</rev> - <file>create_certs.xml</file> - </header> - <p>Here we consider the creation of example certificates. - </p> - - <section> - <title>The openssl Command</title> - <p>The <c>openssl</c> command is a utility that comes with the - OpenSSL distribution. It provides a variety of subcommands. Each - subcommand is invoked as</p> - <code type="none"><![CDATA[ - openssl subcmd <options and arguments> ]]></code> - <p>where <c>subcmd</c> denotes the subcommand in question. - </p> - <p>We shall use the following subcommands to create certificates for - the purpose of testing Erlang/OTP SSL: - </p> - <list type="bulleted"> - <item><em>req</em> to create certificate requests and a - self-signed certificates, - </item> - <item><em>ca</em> to create certificates from certificate requests.</item> - </list> - <p>We create the following certificates: - </p> - <list type="bulleted"> - <item>the <em>erlangCA</em> root certificate (a self-signed - certificate), </item> - <item>the <em>otpCA</em> certificate signed by the <em>erlangCA</em>, </item> - <item>a client certificate signed by the <em>otpCA</em>, and</item> - <item>a server certificate signed by the <em>otpCA</em>.</item> - </list> - - <section> - <title>The openssl configuration file</title> - <p>An <c>openssl</c> configuration file consist of a number of - sections, where each section starts with one line containing - <c>[ section_name ]</c>, where <c>section_name</c> is the name - of the section. The first section of the file is either - unnamed, or is named <c>[ default ]</c>. For further details - see the OpenSSL config(5) manual page. - </p> - <p>The required sections for the subcommands we are going to - use are as follows: - </p> - <table> - <row> - <cell align="left" valign="middle">subcommand</cell> - <cell align="left" valign="middle">required/default section</cell> - <cell align="left" valign="middle">override command line option</cell> - <cell align="left" valign="middle">configuration file option</cell> - </row> - <row> - <cell align="left" valign="middle">req</cell> - <cell align="left" valign="middle">[req]</cell> - <cell align="left" valign="middle">-</cell> - <cell align="left" valign="middle"><c>-config FILE</c></cell> - </row> - <row> - <cell align="left" valign="middle">ca</cell> - <cell align="left" valign="middle">[ca]</cell> - <cell align="left" valign="middle"><c>-name section</c></cell> - <cell align="left" valign="middle"><c>-config FILE</c></cell> - </row> - <tcaption>openssl subcommands to use</tcaption> - </table> - </section> - - <section> - <title>Creating the Erlang root CA</title> - <p>The Erlang root CA is created with the command</p> - <code type="none"> - openssl req -new -x509 -config /some/path/req.cnf \\ - -keyout /some/path/key.pem -out /some/path/cert.pem </code> - <p>where the option <c>-new</c> indicates that we want to create - a new certificate request and the option <c>-x509</c> implies - that a self-signed certificate is created. - </p> - </section> - - <section> - <title>Creating the OTP CA</title> - <p>The OTP CA is created by first creating a certificate request - with the command</p> - <code type="none"> - openssl req -new -config /some/path/req.cnf \\ - -keyout /some/path/key.pem -out /some/path/req.pem </code> - <p>and the ask the Erlang CA to sign it:</p> - <code type="none"> - openssl ca -batch -notext -config /some/path/req.cnf \\ - -extensions ca_cert -in /some/path/req.pem -out /some/path/cert.pem </code> - <p>where the option <c>-extensions</c> refers to a section in the - configuration file saying that it should create a CA certificate, - and not a plain user certificate. - </p> - <p>The <c>client</c> and <c>server</c> certificates are created - similarly, except that the option <c>-extensions</c> then has the - value <c>user_cert</c>. - </p> - </section> - </section> - - <section> - <title>An Example</title> - <p>The following module <c>create_certs</c> is used by the Erlang/OTP - SSL application for generating certificates to be used in tests. The - source code is also found in <c>ssl-X.Y.Z/examples/certs/src</c>. - </p> - <p>The purpose of the <c>create_certs:all/1</c> function is to make - it possible to provide from the <c>erl</c> command line, the - full path name of the <c>openssl</c> command. - </p> - <p>Note that the module creates temporary OpenSSL configuration files - for the <c>req</c> and <c>ca</c> subcommands. - </p> - <codeinclude file="../../examples/certs/src/make_certs.erl" tag="" type="erl"></codeinclude> - </section> -</chapter> - - diff --git a/lib/ssl/doc/src/insidecover.xml b/lib/ssl/doc/src/insidecover.xml deleted file mode 100644 index 4f3f5e5951..0000000000 --- a/lib/ssl/doc/src/insidecover.xml +++ /dev/null @@ -1,14 +0,0 @@ -<?xml version="1.0" encoding="latin1" ?> -<!DOCTYPE bookinsidecover SYSTEM "bookinsidecover.dtd"> - -<bookinsidecover> -The Erlang/OTP SSL application includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit (http://www.openssl.org/). Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. <br></br> -This product includes cryptographic software written by Eric Young ([email protected]). This product includes software written by Tim Hudson ([email protected]). Copyright (C) 1995-1998 Eric Young ([email protected]). All rights reserved. <br></br> -For further OpenSSL and SSLeay license information se the chapter <bold>Licenses</bold> -. <vfill></vfill> - <br></br> - <tt>http://www.erlang.org</tt> - <br></br> -</bookinsidecover> - - diff --git a/lib/ssl/doc/src/licenses.xml b/lib/ssl/doc/src/licenses.xml deleted file mode 100644 index 0969f9ad6e..0000000000 --- a/lib/ssl/doc/src/licenses.xml +++ /dev/null @@ -1,156 +0,0 @@ -<?xml version="1.0" encoding="latin1" ?> -<!DOCTYPE chapter SYSTEM "chapter.dtd"> - -<chapter> - <header> - <copyright> - <year>2003</year><year>2009</year> - <holder>Ericsson AB. All Rights Reserved.</holder> - </copyright> - <legalnotice> - The contents of this file are subject to the Erlang Public License, - Version 1.1, (the "License"); you may not use this file except in - compliance with the License. You should have received a copy of the - Erlang Public License along with this software. If not, it can be - retrieved online at http://www.erlang.org/. - - Software distributed under the License is distributed on an "AS IS" - basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See - the License for the specific language governing rights and limitations - under the License. - - </legalnotice> - - <title>Licenses</title> - <prepared>Peter Högfeldt</prepared> - <docno></docno> - <date>2003-05-26</date> - <rev>A</rev> - <file>licenses.xml</file> - </header> - <p> <marker id="licenses"></marker> -This chapter contains in extenso versions - of the OpenSSL and SSLeay licenses. - </p> - - <section> - <title>OpenSSL License</title> - <code type="none"> -/* ==================================================================== - * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. All advertising materials mentioning features or use of this - * software must display the following acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" - * - * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to - * endorse or promote products derived from this software without - * prior written permission. For written permission, please contact - * [email protected]. - * - * 5. Products derived from this software may not be called "OpenSSL" - * nor may "OpenSSL" appear in their names without prior written - * permission of the OpenSSL Project. - * - * 6. Redistributions of any form whatsoever must retain the following - * acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit (http://www.openssl.org/)" - * - * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY - * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - * ==================================================================== - * - * This product includes cryptographic software written by Eric Young - * ([email protected]). This product includes software written by Tim - * Hudson ([email protected]). - * - */ </code> - </section> - - <section> - <title>SSLeay License</title> - <code type="none"> -/* Copyright (C) 1995-1998 Eric Young ([email protected]) - * All rights reserved. - * - * This package is an SSL implementation written - * by Eric Young ([email protected]). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson ([email protected]). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * "This product includes cryptographic software written by - * Eric Young ([email protected])" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson ([email protected])" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] - */ </code> - </section> -</chapter> - - diff --git a/lib/ssl/doc/src/make.dep b/lib/ssl/doc/src/make.dep deleted file mode 100644 index 2ff81bee1f..0000000000 --- a/lib/ssl/doc/src/make.dep +++ /dev/null @@ -1,30 +0,0 @@ -# ---------------------------------------------------- -# >>>> Do not edit this file <<<< -# This file was automaticly generated by -# /home/otp/bin/docdepend -# ---------------------------------------------------- - - -# ---------------------------------------------------- -# TeX files that the DVI file depend on -# ---------------------------------------------------- - -book.dvi: book.tex create_certs.tex licenses.tex new_ssl.tex \ - pkix_certs.tex refman.tex ssl.tex ssl_app.tex \ - ssl_distribution.tex ssl_protocol.tex usersguide.tex \ - using_ssl.tex - -# ---------------------------------------------------- -# Source inlined when transforming from source to LaTeX -# ---------------------------------------------------- - -book.tex: refman.xml - -create_certs.tex: ../../examples/certs/src/make_certs.erl - -using_ssl.tex: ../../examples/src/client_server.erl - -pkix_certs.tex: ../../../../system/doc/definitions/cite.defs - -ssl_protocol.tex: ../../../../system/doc/definitions/cite.defs - diff --git a/lib/ssl/doc/src/new_ssl.xml b/lib/ssl/doc/src/new_ssl.xml deleted file mode 100644 index 08868a1b3c..0000000000 --- a/lib/ssl/doc/src/new_ssl.xml +++ /dev/null @@ -1,681 +0,0 @@ -<?xml version="1.0" encoding="latin1" ?> -<!DOCTYPE erlref SYSTEM "erlref.dtd"> - -<erlref> - <header> - <copyright> - <year>1999</year> - <year>2007</year> - <holder>Ericsson AB, All Rights Reserved</holder> - </copyright> - <legalnotice> - The contents of this file are subject to the Erlang Public License, - Version 1.1, (the "License"); you may not use this file except in - compliance with the License. You should have received a copy of the - Erlang Public License along with this software. If not, it can be - retrieved aniline's at http://www.erlang.org/. - - Software distributed under the License is distributed on an "AS IS" - basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See - the License for the specific language governing rights and limitations - under the License. - - The Initial Developer of the Original Code is Ericsson AB. - </legalnotice> - - <title>ssl</title> - <prepared>Ingela Anderton Andin</prepared> - <responsible>Ingela Anderton Andin</responsible> - <docno></docno> - <approved></approved> - <checked></checked> - <date>2003-03-25</date> - <rev></rev> - <file>new_ssl.xml</file> - </header> - <module>new_ssl</module> - <modulesummary>Interface Functions for Secure Socket Layer</modulesummary> - <description> - <p>This module contains interface functions to the Secure Socket - Layer. - </p> - </description> - - <section> - <title>NEW SSL</title> - - <p>This manual page describes functions that are defined - in the ssl module and represents the new ssl implementation - that coexists with the old one, as the new implementation - is not yet complete enough to replace the old one.</p> - - <p>The new implementation can be - accessed by providing the option {ssl_imp, new} to the - ssl:connect and ssl:listen functions.</p> - - <p>The new implementation is Erlang based and all logic - is in Erlang and only payload encryption calculations are - done in C via the crypto application. The main reason for - making a new implementation is that the old solution was - very crippled as the control of the ssl-socket was deep - down in openssl making it hard if not impossible to - support all inet options, ipv6 and upgrade of a tcp - connection to a ssl connection. This version has a - few limitations that will be removed before the ssl-4.0 - release. Main differences and limitations are listed below.</p> - - <list type="bulleted"> - <item>New ssl requires the crypto - application.</item> - <item>The option reuseaddr is - supported and the default value is false as in gen_tcp. - Old ssl is patched to accept that the option is set to - true to provide a smoother migration between the - versions. In old ssl the option is hard coded to - true.</item> - <item>ssl:version/0 is replaced by - ssl:versions/0</item> - <item>ssl:ciphers/0 is replaced by - ssl:cipher_suites/0</item> - <item>ssl:pid/1 is a - meaningless function in new ssl and will be deprecated in - ssl-4.0 until it is removed it will return a valid but - meaningless pid.</item> - <item>New API functions are - ssl:shutdown/2, ssl:cipher_suites/[0,1] and - ssl:versions/0</item> - <item>CRL and policy certificate - extensions are not supported yet. </item> - <item>Supported SSL/TLS-versions are SSL-3.0 and TLS-1.0 </item> - <item>For security reasons sslv2 is not supported.</item> - </list> - - </section> - - <section> - <title>COMMON DATA TYPES</title> - <p>The following data types are used in the functions below: - </p> - - <p><c>boolean() = true | false</c></p> - - <p><c>property() = atom()</c></p> - - <p><c>option() = socketoption() | ssloption() | transportoption()</c></p> - - <p><c>socketoption() = [{property(), term()}] - defaults to - [{mode,list},{packet, 0},{header, 0},{active, true}]. - </c></p> - - <p>For valid options - see <seealso marker="kernel:inet">inet(3) </seealso> and - <seealso marker="kernel:gen_tcp">gen_tcp(3) </seealso>. - </p> - - <p> <c>ssloption() = {verify, verify_type()} | - {fail_if_no_peer_cert, boolean()} - {depth, integer()} | - {certfile, path()} | {keyfile, path()} | {password, string()} | - {cacertfile, path()} | {dhfile, path()} | {ciphers, ciphers()} | - {ssl_imp, ssl_imp()} | {reuse_sessions, boolean()} | {reuse_session, fun()} - </c></p> - - <p><c>transportoption() = {CallbackModule, DataTag, ClosedTag} - - defaults to {gen_tcp, tcp, tcp_closed}. Ssl may be - run over any reliable transport protocol that has - an equivalent API to gen_tcp's.</c></p> - - <p><c> CallbackModule = - atom()</c> - </p> <p><c> DataTag = - atom() - tag used in socket data message.</c></p> - <p><c> ClosedTag = atom() - tag used in - socket close message.</c></p> - - <p><c>verify_type() = verify_none | verify_peer</c></p> - - <p><c>path() = string() - representing a file path.</c></p> - - <p><c>host() = hostname() | ipaddress()</c></p> - - <p><c>hostname() = string()</c></p> - - <p><c> - ip_address() = {N1,N2,N3,N4} % IPv4 - | {K1,K2,K3,K4,K5,K6,K7,K8} % IPv6 </c></p> - - <p><c>sslsocket() - opaque to the user. </c></p> - - <p><c>protocol() = sslv3 | tlsv1 </c></p> - - <p><c>ciphers() = [ciphersuite()] | sting() (according to old API)</c></p> - - <p><c>ciphersuite() = - {key_exchange(), cipher(), hash(), exportable()}</c></p> - - <p><c>key_exchange() = rsa | dh_dss | dh_rsa | dh_anon | dhe_dss - | dhe_rsa | krb5 | KeyExchange_export - </c></p> - - <p><c>cipher() = rc4_128 | idea_cbc | des_cbc | '3des_ede_cbc' - des40_cbc | dh_dss | aes_128_cbc | aes_256_cbc | - rc2_cbc_40 | rc4_40 </c></p> - - <p> <c>hash() = md5 | sha - </c></p> - - <p> <c>exportable() = export | no_export | ignore - </c></p> - - <p><c>ssl_imp() = new | old - default is old.</c></p> - - </section> - -<section> - <title>SSL OPTION DESCRIPTIONS</title> - - <taglist> - <tag>{verify, verify_type()}</tag> - <item> If <c>verify_none</c> is specified x509-certificate - path validation errors at the client side - will not automatically cause the connection to fail, as - it will if the verify type is <c>verify_peer</c>. See also - the option verify_fun. - Servers only do the path validation if <c>verify_peer</c> is set to - true, as it then will - send a certificate request to - the client (this message is not sent if the verify option is - <c>verify_none</c>) and you may then also want to specify - the option <c>fail_if_no_peer_cert</c>. - </item> - - <tag>{fail_if_no_peer_cert, boolean()}</tag> - <item>Used together with {verify, verify_peer} by a ssl server. - If set to true, - the server will fail if the client does not have a certificate - to send, e.i sends a empty certificate, if set to false it will - only fail if the client sends a invalid certificate (an empty - certificate is considered valid). - </item> - - <tag>{verify_fun, fun(ErrorList) -> boolean()}</tag> - <item>Used by the ssl client to determine if - x509-certificate path validations errors are acceptable or - if the connection should fail. Defaults to: - -<code> -fun(ErrorList) -> - case lists:foldl(fun({bad_cert,unknown_ca}, Acc) -> - Acc; - (Other, Acc) -> - [Other | Acc] - end, [], ErrorList) of - [] -> - true; - [_|_] -> - false - end -end -</code> - I.e. by default if the only error found was that the CA-certificate - holder was unknown this will be accepted. - - Possible errors in the error list are: - {bad_cert, cert_expired}, {bad_cert, invalid_issuer}, - {bad_cert, invalid_signature}, {bad_cert, name_not_permitted}, - {bad_cert, unknown_ca}, - {bad_cert, cert_expired}, {bad_cert, invalid_issuer}, - {bad_cert, invalid_signature}, {bad_cert, name_not_permitted}, - {bad_cert, cert_revoked} (not implemented yet), - {bad_cert, unknown_critical_extension} or {bad_cert, term()} (Will - be relevant later when an option is added for the user to be able to verify application specific extensions.) - </item> - - <tag>{depth, integer()}</tag> - <item>Specifies the maximum - verification depth, i.e. how far in a chain of certificates the - verification process can proceed before the verification is - considered to fail. Peer certificate = 0, CA certificate = 1, - higher level CA certificate = 2, etc. The value 2 thus means - that a chain can at most contain peer cert, CA cert, next CA - cert, and an additional CA cert. The default value is 1. - </item> - - <tag>{certfile, path()}</tag> - <item>Path to a file containing the - user's certificate. Optional for clients but note - that some servers requires that the client can certify - itself. </item> - <tag>{keyfile, path()}</tag> - <item>Path to file containing user's - private PEM encoded key. As PEM-files may contain several - entries this option defaults to the same file as given by - certfile option.</item> - <tag>{password, string()}</tag> - <item>String containing the user's password. - Only used if the private keyfile is password protected. - </item> - <tag>{cacertfile, path()}</tag> - <item>Path to file containing PEM encoded - CA certificates (trusted certificates used for verifying a peer - certificate). May be omitted if you do not want to verify - the peer.</item> - - <tag>{dhfile, path()}</tag> - <item>Path to file containing PEM encoded Diffie Hellman parameters, - for the server to use if a cipher suite using Diffie Hellman key exchange - is negotiated. If not specified hardcode parameters will be used. - </item> - - <tag>{ciphers, ciphers()}</tag> - <item>The function <c>ciphers_suites/0</c> can - be used to find all available ciphers. - </item> - - <tag>{ssl_imp, ssl_imp()}</tag> - <item>Specify which ssl implementation you want to use. - </item> - - <tag>{reuse_sessions, boolean()}</tag> - <item>Specifies if ssl sessions should be reused - when possible. - </item> - - <tag>{reuse_session, fun(SuggestedSessionId, - PeerCert, Compression, CipherSuite) -> boolean()}</tag> - <item>Enables the ssl server to have a local policy - for deciding if a session should be reused or not, - only meaning full if <c>reuse_sessions</c> is set to true. - SuggestedSessionId is a binary(), PeerCert is a DER encoded - certificate, Compression is an enumeration integer - and CipherSuite of type ciphersuite(). - </item> - </taglist> - </section> - - <section> - <title>General</title> - - <p>When a ssl socket is in active mode (the default), data from the - socket is delivered to the owner of the socket in the form of - messages: - </p> - <list type="bulleted"> - <item>{ssl, Socket, Data} - </item> - <item>{ssl_closed, Socket} - </item> - <item> - {ssl_error, Socket, Reason} - </item> - </list> - - <p>A <c>Timeout</c> argument specifies a timeout in milliseconds. The - default value for a <c>Timeout</c> argument is <c>infinity</c>. - </p> - </section> - - <funcs> - <func> - <name>cipher_suites() -></name> - <name>cipher_suites(Type) -> ciphers()</name> - <fsummary> Returns a list of supported cipher suites</fsummary> - <type> - <v>Type = erlang | openssl</v> - - </type> - <desc><p>Returns a list of supported cipher suites. - cipher_suites() is equivalent to cipher_suites(erlang). - Type openssl is provided for backwards compatibility with - old ssl that used openssl. - </p> - </desc> - </func> - - <func> - <name>connect(Socket, SslOptions) -> </name> - <name>connect(Socket, SslOptions, Timeout) -> {ok, SslSocket} - | {error, Reason}</name> - <fsummary> Upgrades a gen_tcp, or - equivalent, connected socket to a ssl socket. </fsummary> - <type> - <v>Socket = socket()</v> - <v>SslOptions = [ssloption()]</v> - <v>Timeout = integer() | infinity</v> - <v>SslSocket = sslsocket()</v> - <v>Reason = term()</v> - </type> - <desc> <p>Upgrades a gen_tcp, or equivalent, - connected socket to a ssl socket e.i performs the - client-side ssl handshake.</p> - </desc> - </func> - - <func> - <name>connect(Host, Port, Options) -></name> - <name>connect(Host, Port, Options, Timeout) -> - {ok, SslSocket} | {error, Reason}</name> - <fsummary>Opens an ssl connection to Host, Port. </fsummary> - <type> - <v>Host = host()</v> - <v>Port = integer()</v> - <v>Options = [option()]</v> - <v>Timeout = integer() | infinity</v> - <v>SslSocket = sslsocket()</v> - <v>Reason = term()</v> - </type> - <desc> <p>Opens an ssl connection to Host, Port.</p> </desc> - </func> - - <func> - <name>close(SslSocket) -> ok | {error, Reason}</name> - <fsummary>Close a ssl connection</fsummary> - <type> - <v>SslSocket = sslsocket()</v> - <v>Reason = term()</v> - </type> - <desc><p>Close a ssl connection.</p> - </desc> - </func> - - <func> - <name>controlling_process(SslSocket, NewOwner) -> - ok | {error, Reason}</name> - - <fsummary>Assigns a new controlling process to the - ssl-socket.</fsummary> - - <type> - <v>SslSocket = sslsocket()</v> - <v>NewOwner = pid()</v> - <v>Reason = term()</v> - </type> - <desc><p>Assigns a new controlling process to the ssl-socket. A - controlling process is the owner of a ssl-socket, and receives - all messages from the socket.</p> - </desc> - </func> - - <func> - <name>connection_info(SslSocket) -> - {ok, {ProtocolVersion, CipherSuite}} | {error, Reason} </name> - <fsummary>Returns the negotiated protocol version and cipher suite. - </fsummary> - <type> - <v>CipherSuite = ciphersuite()</v> - <v>ProtocolVersion = protocol()</v> - </type> - <desc><p>Returns the negotiated protocol version and cipher suite.</p> - </desc> - </func> - - <func> - <name>getopts(Socket) -> </name> - <name>getopts(Socket, OptionNames) -> - {ok, [socketoption()]} | {error, Reason}</name> - <fsummary>Get the value of the specified options.</fsummary> - <type> - <v>Socket = sslsocket()</v> - <v>OptionNames = [property()]</v> - </type> - <desc> - <p>Get the value of the specified socket options, if no - options are specified all options are returned. - </p> - </desc> - </func> - - <func> - <name>listen(Port, Options) -> - {ok, ListenSocket} | {error, Reason}</name> - <fsummary>Creates a ssl listen socket.</fsummary> - <type> - <v>Port = integer()</v> - <v>Options = options()</v> - <v>ListenSocket = sslsocket()</v> - </type> - <desc> - <p>Creates a ssl listen socket.</p> - </desc> - </func> - - <func> - <name>peercert(Socket) -> {ok, Cert} | {error, Reason}</name> - <fsummary>Return the peer certificate.</fsummary> - <type> - <v>Socket = sslsocket()</v> - <v>Cert = binary()</v> - <v>Subject = term()</v> - </type> - <desc> - <p>The peer certificate is returned as a DER encoded binary. - The certificate can be decoded with <c>public_key:pkix_decode_cert/2</c>. - </p> - </desc> - </func> - <func> - <name>peername(Socket) -> {ok, {Address, Port}} | - {error, Reason}</name> - <fsummary>Return peer address and port.</fsummary> - <type> - <v>Socket = sslsocket()</v> - <v>Address = ipaddress()</v> - <v>Port = integer()</v> - </type> - <desc> - <p>Returns the address and port number of the peer.</p> - </desc> - </func> - - <func> - <name>recv(Socket, Length) -> </name> - <name>recv(Socket, Length, Timeout) -> {ok, Data} | {error, - Reason}</name> - <fsummary>Receive data on a socket.</fsummary> - <type> - <v>Socket = sslsocket()</v> - <v>Length = integer()</v> - <v>Timeout = integer()</v> - <v>Data = [char()] | binary()</v> - </type> - <desc> - <p>This function receives a packet from a socket in passive - mode. A closed socket is indicated by a return value - <c>{error, closed}</c>.</p> - <p>The <c>Length</c> argument is only meaningful when - the socket is in <c>raw</c> mode and denotes the number of - bytes to read. If <c>Length</c> = 0, all available bytes are - returned. If <c>Length</c> > 0, exactly <c>Length</c> - bytes are returned, or an error; possibly discarding less - than <c>Length</c> bytes of data when the socket gets closed - from the other side.</p> - <p>The optional <c>Timeout</c> parameter specifies a timeout in - milliseconds. The default value is <c>infinity</c>.</p> - </desc> - </func> - - <func> - <name>renegotiate(Socket) -> ok | {error, Reason}</name> - <fsummary> Initiates a new handshake.</fsummary> - <type> - <v>Socket = sslsocket()</v> - </type> - <desc><p>Initiates a new handshake. A notable return value is - <c>{error, renegotiation_rejected}</c> indicating that the peer - refused to go through with the renegotiation but the connection - is still active using the previously negotiated session.</p> - </desc> - </func> - - <func> - <name>send(Socket, Data) -> ok | {error, Reason}</name> - <fsummary>Write data to a socket.</fsummary> - <type> - <v>Socket = sslsocket()</v> - <v>Data = iolist() | binary()</v> - </type> - <desc> - <p>Writes <c>Data</c> to <c>Socket</c>. </p> - <p>A notable return value is <c>{error, closed}</c> indicating that - the socket is closed.</p> - </desc> - </func> - <func> - <name>setopts(Socket, Options) -> ok | {error, Reason}</name> - <fsummary>Set socket options.</fsummary> - <type> - <v>Socket = sslsocket()</v> - <v>Options = [socketoption]()</v> - </type> - <desc> - <p>Sets options according to <c>Options</c> for the socket - <c>Socket</c>. </p> - </desc> - </func> - - <func> - <name>shutdown(Socket, How) -> ok | {error, Reason}</name> - <fsummary>Immediately close a socket</fsummary> - <type> - <v>Socket = sslsocket()</v> - <v>How = read | write | read_write</v> - <v>Reason = reason()</v> - </type> - <desc> - <p>Immediately close a socket in one or two directions.</p> - <p><c>How == write</c> means closing the socket for writing, - reading from it is still possible.</p> - <p>To be able to handle that the peer has done a shutdown on - the write side, the <c>{exit_on_close, false}</c> option - is useful.</p> - </desc> - </func> - - <func> - <name>ssl_accept(ListenSocket) -> </name> - <name>ssl_accept(ListenSocket, Timeout) -> ok | {error, Reason}</name> - <fsummary>Perform server-side SSL handshake</fsummary> - <type> - <v>ListenSocket = sslsocket()</v> - <v>Timeout = integer()</v> - <v>Reason = term()</v> - </type> - <desc> - <p>The <c>ssl_accept</c> function establish the SSL connection - on the server side. It should be called directly after - <c>transport_accept</c>, in the spawned server-loop.</p> - </desc> - </func> - - <func> - <name>ssl_accept(ListenSocket, SslOptions) -> </name> - <name>ssl_accept(ListenSocket, SslOptions, Timeout) -> {ok, Socket} | {error, Reason}</name> - <fsummary>Perform server-side SSL handshake</fsummary> - <type> - <v>ListenSocket = socket()</v> - <v>SslOptions = ssloptions()</v> - <v>Timeout = integer()</v> - <v>Reason = term()</v> - </type> - <desc> - <p> Upgrades a gen_tcp, or - equivalent, socket to a ssl socket e.i performs the - ssl server-side handshake.</p> - </desc> - </func> - - <func> - <name>sockname(Socket) -> {ok, {Address, Port}} | - {error, Reason}</name> - <fsummary>Return the local address and port.</fsummary> - <type> - <v>Socket = sslsocket()</v> - <v>Address = ipaddress()</v> - <v>Port = integer()</v> - </type> - <desc> - <p>Returns the local address and port number of the socket - <c>Socket</c>.</p> - </desc> - </func> - - <func> - <name>start() -> </name> - <name>start(Type) -> ok | {error, Reason}</name> - <fsummary>Starts the Ssl application. </fsummary> - <type> - <v>Type = permanent | transient | temporary</v> - </type> - <desc> - <p>Starts the Ssl application. Default type - is temporary. - <seealso marker="kernel:application">application(3)</seealso></p> - </desc> - </func> - <func> - <name>stop() -> ok </name> - <fsummary>Stops the Ssl application.</fsummary> - <desc> - <p>Stops the Ssl application. - <seealso marker="kernel:application">application(3)</seealso></p> - </desc> - </func> - - <func> - <name>transport_accept(Socket) -></name> - <name>transport_accept(Socket, Timeout) -> - {ok, NewSocket} | {error, Reason}</name> - <fsummary>Accept an incoming connection and - prepare for <c>ssl_accept</c></fsummary> - <type> - <v>Socket = NewSocket = sslsocket()</v> - <v>Timeout = integer()</v> - <v>Reason = reason()</v> - </type> - <desc> - <p>Accepts an incoming connection request on a listen socket. - <c>ListenSocket</c> must be a socket returned from - <c>listen/2</c>. The socket returned should be passed to - <c>ssl_accept</c> to complete ssl handshaking and - establishing the connection.</p> - <warning> - <p>The socket returned can only be used with <c>ssl_accept</c>, - no traffic can be sent or received before that call.</p> - </warning> - <p>The accepted socket inherits the options set for - <c>ListenSocket</c> in <c>listen/2</c>.</p> - <p>The default - value for <c>Timeout</c> is <c>infinity</c>. If - <c>Timeout</c> is specified, and no connection is accepted - within the given time, <c>{error, timeout}</c> is - returned.</p> - </desc> - </func> - - <func> - <name>versions() -> - [{SslAppVer, SupportedSslVer, AvailableSslVsn}]</name> - <fsummary>Returns version information relevant for the - ssl application.</fsummary> - <type> - <v>SslAppVer = string()</v> - <v>SupportedSslVer = [protocol()]</v> - <v>AvailableSslVsn = [protocol()]</v> - </type> - <desc> - <p> - Returns version information relevant for the - ssl application.</p> - </desc> - </func> - </funcs> - - <section> - <title>SEE ALSO</title> - <p><seealso marker="kernel:inet">inet(3) </seealso> and - <seealso marker="kernel:gen_tcp">gen_tcp(3) </seealso> - </p> - </section> - -</erlref> - diff --git a/lib/ssl/doc/src/notes.xml b/lib/ssl/doc/src/notes.xml index 9d13427677..95e968aa22 100644 --- a/lib/ssl/doc/src/notes.xml +++ b/lib/ssl/doc/src/notes.xml @@ -30,6 +30,92 @@ </header> <p>This document describes the changes made to the SSL application. </p> + + <section><title>SSL 4.0</title> + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + New ssl now support client/server-certificates signed by + dsa keys.</p> + <p> + Own Id: OTP-8587</p> + </item> + <item> + <p> + Ssl has now switched default implementation and removed + deprecated certificate handling. All certificate handling + is done by the public_key application.</p> + <p> + Own Id: OTP-8695</p> + </item> + </list> + </section> + + </section> + + + <section><title>SSL 3.11.1</title> + + <section><title>Fixed Bugs and Malfunctions</title> + <list> + <item> + <p> + Fixed handling of several ssl/tls packets arriving at the + same time. This was broken during a refactoring of the + code.</p> + <p> + Own Id: OTP-8679</p> + </item> + </list> + </section> + + + <section><title>Improvements and New Features</title> + <list> + <item> + <p> + Added missing checks for padding and Mac value. Removed + code for export ciphers and DH certificates as we decided + not to support them.</p> + <p> + Own Id: OTP-7047</p> + </item> + <item> + <p> + New ssl will no longer return esslerrssl to be backwards + compatible with old ssl as this hids infomation from the + user. format_error/1 has been updated to support new ssl.</p> + <p> + *** POTENTIAL INCOMPATIBILITY ***</p> + <p> + Own Id: OTP-7049</p> + </item> + <item> + <p> + New ssl now supports secure renegotiation as described by + RFC 5746.</p> + <p> + Own Id: OTP-8568</p> + </item> + <item> + <p> + Alert handling has been improved to better handle + unexpected but valid messages and the implementation is + also changed to avoid timing related issues that could + cause different error messages depending on network + latency. Packet handling was sort of broken but would + mostly work as expected when socket was in binary mode. + This has now been fixed.</p> + <p> + Own Id: OTP-8588</p> + </item> + </list> + </section> + +</section> + <section><title>SSL 3.11</title> <section><title>Fixed Bugs and Malfunctions</title> @@ -733,7 +819,7 @@ <title>Fixed Bugs and Malfunctions</title> <list type="bulleted"> <item> - <p>When a file descriptor was marked for closing, and and + <p>When a file descriptor was marked for closing, and end-of-file condition had already been detected, the file descriptor was never closed.</p> <p>Own Id: OTP-5093 Aux Id: seq8806 </p> diff --git a/lib/ssl/doc/src/old_ssl.xml b/lib/ssl/doc/src/old_ssl.xml new file mode 100644 index 0000000000..0d2e1afdbd --- /dev/null +++ b/lib/ssl/doc/src/old_ssl.xml @@ -0,0 +1,709 @@ +<?xml version="1.0" encoding="latin1" ?> +<!DOCTYPE erlref SYSTEM "erlref.dtd"> + +<erlref> + <header> + <copyright> + <year>1999</year><year>2010</year> + <holder>Ericsson AB. All Rights Reserved.</holder> + </copyright> + <legalnotice> + The contents of this file are subject to the Erlang Public License, + Version 1.1, (the "License"); you may not use this file except in + compliance with the License. You should have received a copy of the + Erlang Public License along with this software. If not, it can be + retrieved online at http://www.erlang.org/. + + Software distributed under the License is distributed on an "AS IS" + basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + the License for the specific language governing rights and limitations + under the License. + + </legalnotice> + + <title>ssl</title> + <prepared>Peter Högfeldt</prepared> + <responsible>Peter Högfeldt</responsible> + <docno></docno> + <approved>Peter Högfeldt</approved> + <checked></checked> + <date>2003-03-25</date> + <rev>D</rev> + <file>old_ssl.xml</file> + </header> + <module>old_ssl</module> + <modulesummary>Interface Functions for Secure Socket Layer</modulesummary> + <description> + <p>This module contains interface functions to the Secure Socket Layer.</p> + </description> + + <section> + <title>General</title> + + <p>This manual page describes functions that are defined + in the ssl module and represents the old ssl implementation + that coexists with the new one until it has been + totally phased out. </p> + + <p>The old implementation can be + accessed by providing the option {ssl_imp, old} to the + ssl:connect and ssl:listen functions.</p> + + <p>The reader is advised to also read the <c>ssl(6)</c> manual page + describing the SSL application. + </p> + <warning> + <p>It is strongly advised to seed the random generator after + the ssl application has been started (see <c>seed/1</c> + below), and before any connections are established. Although + the port program interfacing to the ssl libraries does a + "random" seeding of its own in order to make everything work + properly, that seeding is by no means random for the world + since it has a constant value which is known to everyone + reading the source code of the port program.</p> + </warning> + </section> + + <section> + <title>Common data types</title> + <p>The following datatypes are used in the functions below: + </p> + <list type="bulleted"> + <item> + <p><c>options() = [option()]</c></p> + </item> + <item> + <p><c>option() = socketoption() | ssloption()</c></p> + </item> + <item> + <p><c>socketoption() = {mode, list} | {mode, binary} | binary | {packet, packettype()} | {header, integer()} | {nodelay, boolean()} | {active, activetype()} | {backlog, integer()} | {ip, ipaddress()} | {port, integer()}</c></p> + </item> + <item> + <p><c>ssloption() = {verify, code()} | {depth, depth()} | {certfile, path()} | {keyfile, path()} | {password, string()} | {cacertfile, path()} | {ciphers, string()}</c></p> + </item> + <item> + <p><c>packettype()</c> (see inet(3))</p> + </item> + <item> + <p><c>activetype()</c> (see inet(3))</p> + </item> + <item> + <p><c>reason() = atom() | {atom(), string()}</c></p> + </item> + <item> + <p><c>bytes() = [byte()]</c></p> + </item> + <item> + <p><c>string() = [byte()]</c></p> + </item> + <item> + <p><c>byte() = 0 | 1 | 2 | ... | 255</c></p> + </item> + <item> + <p><c>code() = 0 | 1 | 2</c></p> + </item> + <item> + <p><c>depth() = byte()</c></p> + </item> + <item> + <p><c>address() = hostname() | ipstring() | ipaddress()</c></p> + </item> + <item> + <p><c>ipaddress() = ipstring() | iptuple()</c></p> + </item> + <item> + <p><c>hostname() = string()</c></p> + </item> + <item> + <p><c>ipstring() = string()</c></p> + </item> + <item> + <p><c>iptuple() = {byte(), byte(), byte(), byte()}</c></p> + </item> + <item> + <p><c>sslsocket()</c></p> + </item> + <item> + <p><c>protocol() = sslv2 | sslv3 | tlsv1</c></p> + </item> + <item> + <p><c></c></p> + </item> + </list> + <p>The socket option <c>{backlog, integer()}</c> is for + <c>listen/2</c> only, and the option <c>{port, integer()}</c> + is for <c>connect/3/4</c> only. + </p> + <p>The following socket options are set by default: <c>{mode, list}</c>, <c>{packet, 0}</c>, <c>{header, 0}</c>, <c>{nodelay, false}</c>, <c>{active, true}</c>, <c>{backlog, 5}</c>, + <c>{ip, {0,0,0,0}}</c>, and <c>{port, 0}</c>. + </p> + <p>Note that the options <c>{mode, binary}</c> and <c>binary</c> + are equivalent. Similarly <c>{mode, list}</c> and the absence of + option <c>binary</c> are equivalent. + </p> + <p>The ssl options are for setting specific SSL parameters as follows: + </p> + <list type="bulleted"> + <item> + <p><c>{verify, code()}</c> Specifies type of verification: + 0 = do not verify peer; 1 = verify peer, 2 = verify peer, + fail if no peer certificate. The default value is 0. + </p> + </item> + <item> + <p><c>{depth, depth()}</c> Specifies the maximum + verification depth, i.e. how far in a chain of certificates + the verification process can proceed before the verification + is considered to fail. + </p> + <p>Peer certificate = 0, CA certificate = 1, higher level CA + certificate = 2, etc. The value 2 thus means that a chain + can at most contain peer cert, CA cert, next CA cert, and an + additional CA cert. + </p> + <p>The default value is 1. + </p> + </item> + <item> + <p><c>{certfile, path()}</c> Path to a file containing the + user's certificate. + chain of PEM encoded certificates.</p> + </item> + <item> + <p><c>{keyfile, path()}</c> Path to file containing user's + private PEM encoded key.</p> + </item> + <item> + <p><c>{password, string()}</c> String containing the user's + password. Only used if the private keyfile is password protected.</p> + </item> + <item> + <p><c>{cacertfile, path()}</c> Path to file containing PEM encoded + CA certificates (trusted certificates used for verifying a peer + certificate).</p> + </item> + <item> + <p><c>{ciphers, string()}</c> String of ciphers as a colon + separated list of ciphers. The function <c>ciphers/0</c> can + be used to find all available ciphers.</p> + </item> + </list> + <p>The type <c>sslsocket()</c> is opaque to the user. + </p> + <p>The owner of a socket is the one that created it by a call to + <c>transport_accept/[1,2]</c>, <c>connect/[3,4]</c>, + or <c>listen/2</c>. + </p> + <p>When a socket is in active mode (the default), data from the + socket is delivered to the owner of the socket in the form of + messages: + </p> + <list type="bulleted"> + <item> + <p><c>{ssl, Socket, Data}</c></p> + </item> + <item> + <p><c>{ssl_closed, Socket}</c></p> + </item> + <item> + <p><c>{ssl_error, Socket, Reason}</c></p> + </item> + </list> + <p>A <c>Timeout</c> argument specifies a timeout in milliseconds. The + default value for a <c>Timeout</c> argument is <c>infinity</c>. + </p> + <p>Functions listed below may return the value <c>{error, closed}</c>, which only indicates that the SSL socket is + considered closed for the operation in question. It is for + instance possible to have <c>{error, closed}</c> returned from + an call to <c>send/2</c>, and a subsequent call to <c>recv/3</c> + returning <c>{ok, Data}</c>. + </p> + <p>Hence a return value of <c>{error, closed}</c> must not be + interpreted as if the socket was completely closed. On the + contrary, in order to free all resources occupied by an SSL + socket, <c>close/1</c> must be called, or else the process owning + the socket has to terminate. + </p> + <p>For each SSL socket there is an Erlang process representing the + socket. When a socket is opened, that process links to the + calling client process. Implementations that want to detect + abnormal exits from the socket process by receiving <c>{'EXIT', Pid, Reason}</c> messages, should use the function <c>pid/1</c> + to retrieve the process identifier from the socket, in order to + be able to match exit messages properly.</p> + </section> + <funcs> + <func> + <name>ciphers() -> {ok, string()} | {error, enotstarted}</name> + <fsummary>Get supported ciphers.</fsummary> + <desc> + <p>Returns a string consisting of colon separated cipher + designations that are supported by the current SSL library + implementation. + </p> + <p>The SSL application has to be started to return the string + of ciphers.</p> + </desc> + </func> + <func> + <name>close(Socket) -> ok | {error, Reason}</name> + <fsummary>Close a socket returned by <c>transport_accept/[1,2]</c>, <c>connect/3/4</c>, or <c>listen/2</c>.</fsummary> + <type> + <v>Socket = sslsocket()</v> + </type> + <desc> + <p>Closes a socket returned by <c>transport_accept/[1,2]</c>, + <c>connect/[3,4]</c>, or <c>listen/2</c></p> + </desc> + </func> + <func> + <name>connect(Address, Port, Options) -> {ok, Socket} | {error, Reason}</name> + <name>connect(Address, Port, Options, Timeout) -> {ok, Socket} | {error, Reason}</name> + <fsummary>Connect to <c>Port</c>at <c>Address</c>.</fsummary> + <type> + <v>Address = address()</v> + <v>Port = integer()</v> + <v>Options = [connect_option()]</v> + <v>connect_option() = {mode, list} | {mode, binary} | binary | {packet, packettype()} | {header, integer()} | {nodelay, boolean()} | {active, activetype()} | {ip, ipaddress()} | {port, integer()} | {verify, code()} | {depth, depth()} | {certfile, path()} | {keyfile, path()} | {password, string()} | {cacertfile, path()} | {ciphers, string()}</v> + <v>Timeout = integer()</v> + <v>Socket = sslsocket()</v> + </type> + <desc> + <p>Connects to <c>Port</c> at <c>Address</c>. If the optional + <c>Timeout</c> argument is specified, and a connection could not + be established within the given time, <c>{error, timeout}</c> is + returned. The default value for <c>Timeout</c> is <c>infinity</c>. + </p> + <p>The <c>ip</c> and <c>port</c> options are for binding to a + particular <em>local</em> address and port, respectively.</p> + </desc> + </func> + <func> + <name>connection_info(Socket) -> {ok, {Protocol, Cipher}} | {error, Reason}</name> + <fsummary>Get current protocol version and cipher.</fsummary> + <type> + <v>Socket = sslsocket()</v> + <v>Protocol = protocol()</v> + <v>Cipher = string()</v> + </type> + <desc> + <p>Gets the chosen protocol version and cipher for an established + connection (accepted och connected). </p> + </desc> + </func> + <func> + <name>controlling_process(Socket, NewOwner) -> ok | {error, Reason}</name> + <fsummary>Assign a new controlling process to the socket.</fsummary> + <type> + <v>Socket = sslsocket()</v> + <v>NewOwner = pid()</v> + </type> + <desc> + <p>Assigns a new controlling process to <c>Socket</c>. A controlling + process is the owner of a socket, and receives all messages from + the socket.</p> + </desc> + </func> + <func> + <name>format_error(ErrorCode) -> string()</name> + <fsummary>Return an error string.</fsummary> + <type> + <v>ErrorCode = term()</v> + </type> + <desc> + <p>Returns a diagnostic string describing an error.</p> + </desc> + </func> + <func> + <name>getopts(Socket, OptionsTags) -> {ok, Options} | {error, Reason}</name> + <fsummary>Get options set for socket</fsummary> + <type> + <v>Socket = sslsocket()</v> + <v>OptionTags = [optiontag()]()</v> + </type> + <desc> + <p>Returns the options the tags of which are <c>OptionTags</c> for + for the socket <c>Socket</c>. </p> + </desc> + </func> + <func> + <name>listen(Port, Options) -> {ok, ListenSocket} | {error, Reason}</name> + <fsummary>Set up a socket to listen on a port on the local host.</fsummary> + <type> + <v>Port = integer()</v> + <v>Options = [listen_option()]</v> + <v>listen_option() = {mode, list} | {mode, binary} | binary | {packet, packettype()} | {header, integer()} | {active, activetype()} | {backlog, integer()} | {ip, ipaddress()} | {verify, code()} | {depth, depth()} | {certfile, path()} | {keyfile, path()} | {password, string()} | {cacertfile, path()} | {ciphers, string()}</v> + <v>ListenSocket = sslsocket()</v> + </type> + <desc> + <p>Sets up a socket to listen on port <c>Port</c> at the local host. + If <c>Port</c> is zero, <c>listen/2</c> picks an available port + number (use <c>port/1</c> to retrieve it). + </p> + <p>The listen queue size defaults to 5. If a different value is + wanted, the option <c>{backlog, Size}</c> should be added to the + list of options. + </p> + <p>An empty <c>Options</c> list is considered an error, and + <c>{error, enooptions}</c> is returned. + </p> + <p>The returned <c>ListenSocket</c> can only be used in calls to + <c>transport_accept/[1,2]</c>.</p> + </desc> + </func> + <func> + <name>peercert(Socket) -> {ok, Cert} | {error, Reason}</name> + <fsummary>Return the peer certificate.</fsummary> + <type> + <v>Socket = sslsocket()</v> + <v>Cert = binary()()</v> + <v>Subject = term()()</v> + </type> + <desc> + <p>Returns the DER encoded peer certificate, the certificate can be decoded with + <c>public_key:pkix_decode_cert/2</c>. + </p> + </desc> + </func> + <func> + <name>peername(Socket) -> {ok, {Address, Port}} | {error, Reason}</name> + <fsummary>Return peer address and port.</fsummary> + <type> + <v>Socket = sslsocket()</v> + <v>Address = ipaddress()</v> + <v>Port = integer()</v> + </type> + <desc> + <p>Returns the address and port number of the peer.</p> + </desc> + </func> + <func> + <name>pid(Socket) -> pid()</name> + <fsummary>Return the pid of the socket process.</fsummary> + <type> + <v>Socket = sslsocket()</v> + </type> + <desc> + <p>Returns the pid of the socket process. The returned pid should + only be used for receiving exit messages.</p> + </desc> + </func> + <func> + <name>recv(Socket, Length) -> {ok, Data} | {error, Reason}</name> + <name>recv(Socket, Length, Timeout) -> {ok, Data} | {error, Reason}</name> + <fsummary>Receive data on socket.</fsummary> + <type> + <v>Socket = sslsocket()</v> + <v>Length = integer() >= 0</v> + <v>Timeout = integer()</v> + <v>Data = bytes() | binary()</v> + </type> + <desc> + <p>Receives data on socket <c>Socket</c> when the socket is in + passive mode, i.e. when the option <c>{active, false}</c> + has been specified. + </p> + <p>A notable return value is <c>{error, closed}</c> which + indicates that the socket is closed. + </p> + <p>A positive value of the <c>Length</c> argument is only + valid when the socket is in raw mode (option <c>{packet, 0}</c> is set, and the option <c>binary</c> is <em>not</em> + set); otherwise it should be set to 0, whence all available + bytes are returned. + </p> + <p>If the optional <c>Timeout</c> parameter is specified, and + no data was available within the given time, <c>{error, timeout}</c> is returned. The default value for + <c>Timeout</c> is <c>infinity</c>.</p> + </desc> + </func> + <func> + <name>seed(Data) -> ok | {error, Reason}</name> + <fsummary>Seed the ssl random generator.</fsummary> + <type> + <v>Data = iolist() | binary()</v> + </type> + <desc> + <p>Seeds the ssl random generator. + </p> + <p>It is strongly advised to seed the random generator after + the ssl application has been started, and before any + connections are established. Although the port program + interfacing to the OpenSSL libraries does a "random" seeding + of its own in order to make everything work properly, that + seeding is by no means random for the world since it has a + constant value which is known to everyone reading the source + code of the seeding. + </p> + <p>A notable return value is <c>{error, edata}}</c> indicating that + <c>Data</c> was not a binary nor an iolist.</p> + </desc> + </func> + <func> + <name>send(Socket, Data) -> ok | {error, Reason}</name> + <fsummary>Write data to a socket.</fsummary> + <type> + <v>Socket = sslsocket()</v> + <v>Data = iolist() | binary()</v> + </type> + <desc> + <p>Writes <c>Data</c> to <c>Socket</c>. </p> + <p>A notable return value is <c>{error, closed}</c> indicating that + the socket is closed.</p> + </desc> + </func> + <func> + <name>setopts(Socket, Options) -> ok | {error, Reason}</name> + <fsummary>Set socket options.</fsummary> + <type> + <v>Socket = sslsocket()</v> + <v>Options = [socketoption]()</v> + </type> + <desc> + <p>Sets options according to <c>Options</c> for the socket + <c>Socket</c>. </p> + </desc> + </func> + <func> + <name>ssl_accept(Socket) -> ok | {error, Reason}</name> + <name>ssl_accept(Socket, Timeout) -> ok | {error, Reason}</name> + <fsummary>Perform server-side SSL handshake and key exchange</fsummary> + <type> + <v>Socket = sslsocket()</v> + <v>Timeout = integer()</v> + <v>Reason = atom()</v> + </type> + <desc> + <p>The <c>ssl_accept</c> function establish the SSL connection + on the server side. It should be called directly after + <c>transport_accept</c>, in the spawned server-loop.</p> + <p>Note that the ssl connection is not complete until <c>ssl_accept</c> + has returned <c>true</c>, and if an error is returned, the socket + is unavailable and for instance <c>close/1</c> will crash.</p> + </desc> + </func> + <func> + <name>sockname(Socket) -> {ok, {Address, Port}} | {error, Reason}</name> + <fsummary>Return the local address and port.</fsummary> + <type> + <v>Socket = sslsocket()</v> + <v>Address = ipaddress()</v> + <v>Port = integer()</v> + </type> + <desc> + <p>Returns the local address and port number of the socket + <c>Socket</c>.</p> + </desc> + </func> + <func> + <name>transport_accept(Socket) -> {ok, NewSocket} | {error, Reason}</name> + <name>transport_accept(Socket, Timeout) -> {ok, NewSocket} | {error, Reason}</name> + <fsummary>Accept an incoming connection and prepare for <c>ssl_accept</c></fsummary> + <type> + <v>Socket = NewSocket = sslsocket()</v> + <v>Timeout = integer()</v> + <v>Reason = atom()</v> + </type> + <desc> + <p>Accepts an incoming connection request on a listen socket. + <c>ListenSocket</c> must be a socket returned from <c>listen/2</c>. + The socket returned should be passed to <c>ssl_accept</c> to + complete ssl handshaking and establishing the connection.</p> + <warning> + <p>The socket returned can only be used with <c>ssl_accept</c>, + no traffic can be sent or received before that call.</p> + </warning> + <p>The accepted socket inherits the options set for <c>ListenSocket</c> + in <c>listen/2</c>.</p> + <p>The default value for <c>Timeout</c> is <c>infinity</c>. If + <c>Timeout</c> is specified, and no connection is accepted within + the given time, <c>{error, timeout}</c> is returned.</p> + </desc> + </func> + <func> + <name>version() -> {ok, {SSLVsn, CompVsn, LibVsn}}</name> + <fsummary>Return the version of SSL.</fsummary> + <type> + <v>SSLVsn = CompVsn = LibVsn = string()()</v> + </type> + <desc> + <p>Returns the SSL application version (<c>SSLVsn</c>), the library + version used when compiling the SSL application port program + (<c>CompVsn</c>), and the actual library version used when + dynamically linking in runtime (<c>LibVsn</c>). + </p> + <p>If the SSL application has not been started, <c>CompVsn</c> and + <c>LibVsn</c> are empty strings. + </p> + </desc> + </func> + </funcs> + + <section> + <title>ERRORS</title> + <p>The possible error reasons and the corresponding diagnostic strings + returned by <c>format_error/1</c> are either the same as those defined + in the <c>inet(3)</c> reference manual, or as follows: + </p> + <taglist> + <tag><c>closed</c></tag> + <item> + <p>Connection closed for the operation in question. + </p> + </item> + <tag><c>ebadsocket</c></tag> + <item> + <p>Connection not found (internal error). + </p> + </item> + <tag><c>ebadstate</c></tag> + <item> + <p>Connection not in connect state (internal error). + </p> + </item> + <tag><c>ebrokertype</c></tag> + <item> + <p>Wrong broker type (internal error). + </p> + </item> + <tag><c>ecacertfile</c></tag> + <item> + <p>Own CA certificate file is invalid. + </p> + </item> + <tag><c>ecertfile</c></tag> + <item> + <p>Own certificate file is invalid. + </p> + </item> + <tag><c>echaintoolong</c></tag> + <item> + <p>The chain of certificates provided by peer is too long. + </p> + </item> + <tag><c>ecipher</c></tag> + <item> + <p>Own list of specified ciphers is invalid. + </p> + </item> + <tag><c>ekeyfile</c></tag> + <item> + <p>Own private key file is invalid. + </p> + </item> + <tag><c>ekeymismatch</c></tag> + <item> + <p>Own private key does not match own certificate. + </p> + </item> + <tag><c>enoissuercert</c></tag> + <item> + <p>Cannot find certificate of issuer of certificate provided + by peer. + </p> + </item> + <tag><c>enoservercert</c></tag> + <item> + <p>Attempt to do accept without having set own certificate. + </p> + </item> + <tag><c>enotlistener</c></tag> + <item> + <p>Attempt to accept on a non-listening socket. + </p> + </item> + <tag><c>enoproxysocket</c></tag> + <item> + <p>No proxy socket found (internal error). + </p> + </item> + <tag><c>enooptions</c></tag> + <item> + <p>The list of options is empty. + </p> + </item> + <tag><c>enotstarted</c></tag> + <item> + <p>The SSL application has not been started. + </p> + </item> + <tag><c>eoptions</c></tag> + <item> + <p>Invalid list of options. + </p> + </item> + <tag><c>epeercert</c></tag> + <item> + <p>Certificate provided by peer is in error. + </p> + </item> + <tag><c>epeercertexpired</c></tag> + <item> + <p>Certificate provided by peer has expired. + </p> + </item> + <tag><c>epeercertinvalid</c></tag> + <item> + <p>Certificate provided by peer is invalid. + </p> + </item> + <tag><c>eselfsignedcert</c></tag> + <item> + <p>Certificate provided by peer is self signed. + </p> + </item> + <tag><c>esslaccept</c></tag> + <item> + <p>Server SSL handshake procedure between client and server failed. + </p> + </item> + <tag><c>esslconnect</c></tag> + <item> + <p>Client SSL handshake procedure between client and server failed. + </p> + </item> + <tag><c>esslerrssl</c></tag> + <item> + <p>SSL protocol failure. Typically because of a fatal alert + from peer. + </p> + </item> + <tag><c>ewantconnect</c></tag> + <item> + <p>Protocol wants to connect, which is not supported in + this version of the SSL application. + </p> + </item> + <tag><c>ex509lookup</c></tag> + <item> + <p>Protocol wants X.509 lookup, which is not supported in + this version of the SSL application. + </p> + </item> + <tag><c>{badcall, Call}</c></tag> + <item> + <p>Call not recognized for current mode (active or passive) and + state of socket. + </p> + </item> + <tag><c>{badcast, Cast}</c></tag> + <item> + <p>Call not recognized for current mode (active or passive) and + state of socket. + </p> + </item> + <tag><c>{badinfo, Info}</c></tag> + <item> + <p>Call not recognized for current mode (active or passive) and + state of socket. + </p> + </item> + </taglist> + </section> + + <section> + <title>SEE ALSO</title> + <p>gen_tcp(3), inet(3) public_key(3) </p> + </section> + +</erlref> + + diff --git a/lib/ssl/doc/src/refman.xml b/lib/ssl/doc/src/refman.xml index 3ad5a01b46..68f84660f3 100644 --- a/lib/ssl/doc/src/refman.xml +++ b/lib/ssl/doc/src/refman.xml @@ -4,7 +4,7 @@ <application xmlns:xi="http://www.w3.org/2001/XInclude"> <header> <copyright> - <year>1999</year><year>2009</year> + <year>1999</year><year>2010</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -13,12 +13,12 @@ compliance with the License. You should have received a copy of the Erlang Public License along with this software. If not, it can be retrieved online at http://www.erlang.org/. - + Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. - + </legalnotice> <title>SSL Reference Manual</title> @@ -45,7 +45,8 @@ </description> <xi:include href="ssl_app.xml"/> <xi:include href="ssl.xml"/> - <xi:include href="new_ssl.xml"/> + <xi:include href="old_ssl.xml"/> + <xi:include href="ssl_session_cache_api.xml"/> </application> diff --git a/lib/ssl/doc/src/ssl.xml b/lib/ssl/doc/src/ssl.xml index 217eb791d0..def61bcf03 100644 --- a/lib/ssl/doc/src/ssl.xml +++ b/lib/ssl/doc/src/ssl.xml @@ -4,7 +4,7 @@ <erlref> <header> <copyright> - <year>1999</year><year>2009</year> + <year>1999</year><year>2010</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -13,355 +13,429 @@ compliance with the License. You should have received a copy of the Erlang Public License along with this software. If not, it can be retrieved online at http://www.erlang.org/. - + Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. - - </legalnotice> + </legalnotice> <title>ssl</title> - <prepared>Peter Högfeldt</prepared> - <responsible>Peter Högfeldt</responsible> - <docno></docno> - <approved>Peter Högfeldt</approved> - <checked></checked> - <date>2003-03-25</date> - <rev>D</rev> - <file>ssl.sgml</file> + <file>ssl.xml</file> </header> <module>ssl</module> <modulesummary>Interface Functions for Secure Socket Layer</modulesummary> <description> - <p>This module contains interface functions to the Secure Socket Layer.</p> + <p>This module contains interface functions to the Secure Socket + Layer. + </p> </description> + + <section> + <title>SSL</title> + <list type="bulleted"> + <item>ssl requires the crypto an public_key applications.</item> + <item>Supported SSL/TLS-versions are SSL-3.0 and TLS-1.0 </item> + <item>For security reasons sslv2 is not supported.</item> + <item>Ephemeral Diffie-Hellman cipher suites are supported + but not Diffie Hellman Certificates cipher suites.</item> + <item>Export cipher suites are not supported as the + U.S. lifted its export restrictions in early 2000.</item> + <item>CRL and policy certificate + extensions are not supported yet. </item> + </list> + + </section> + <section> - <title>General</title> + <title>COMMON DATA TYPES</title> + <p>The following data types are used in the functions below: + </p> - <p>There is a new implementation of ssl available in - this module but until it is 100 % complete, so that it can replace - the old implementation in all aspects it will be - described here <seealso marker="new_ssl"> new ssl API </seealso></p> + <p><c>boolean() = true | false</c></p> - <p>The reader is advised to also read the <c>ssl(6)</c> manual page - describing the SSL application. - </p> - <warning> - <p>It is strongly advised to seed the random generator after - the ssl application has been started (see <c>seed/1</c> - below), and before any connections are established. Although - the port program interfacing to the ssl libraries does a - "random" seeding of its own in order to make everything work - properly, that seeding is by no means random for the world - since it has a constant value which is known to everyone - reading the source code of the port program.</p> - </warning> - </section> + <p><c>property() = atom()</c></p> + + <p><c>option() = socketoption() | ssloption() | transportoption()</c></p> - <section> - <title>Common data types</title> - <p>The following datatypes are used in the functions below: - </p> - <list type="bulleted"> - <item> - <p><c>options() = [option()]</c></p> - </item> - <item> - <p><c>option() = socketoption() | ssloption()</c></p> - </item> - <item> - <p><c>socketoption() = {mode, list} | {mode, binary} | binary | {packet, packettype()} | {header, integer()} | {nodelay, boolean()} | {active, activetype()} | {backlog, integer()} | {ip, ipaddress()} | {port, integer()}</c></p> - </item> - <item> - <p><c>ssloption() = {verify, code()} | {depth, depth()} | {certfile, path()} | {keyfile, path()} | {password, string()} | {cacertfile, path()} | {ciphers, string()}</c></p> - </item> - <item> - <p><c>packettype()</c> (see inet(3))</p> - </item> - <item> - <p><c>activetype()</c> (see inet(3))</p> - </item> - <item> - <p><c>reason() = atom() | {atom(), string()}</c></p> - </item> - <item> - <p><c>bytes() = [byte()]</c></p> - </item> - <item> - <p><c>string() = [byte()]</c></p> - </item> - <item> - <p><c>byte() = 0 | 1 | 2 | ... | 255</c></p> - </item> - <item> - <p><c>code() = 0 | 1 | 2</c></p> - </item> - <item> - <p><c>depth() = byte()</c></p> - </item> - <item> - <p><c>address() = hostname() | ipstring() | ipaddress()</c></p> - </item> - <item> - <p><c>ipaddress() = ipstring() | iptuple()</c></p> - </item> - <item> - <p><c>hostname() = string()</c></p> - </item> - <item> - <p><c>ipstring() = string()</c></p> - </item> - <item> - <p><c>iptuple() = {byte(), byte(), byte(), byte()}</c></p> - </item> - <item> - <p><c>sslsocket()</c></p> - </item> - <item> - <p><c>protocol() = sslv2 | sslv3 | tlsv1</c></p> + <p><c>socketoption() = [{property(), term()}] - defaults to + [{mode,list},{packet, 0},{header, 0},{active, true}]. + </c></p> + + <p>For valid options + see <seealso marker="kernel:inet">inet(3) </seealso> and + <seealso marker="kernel:gen_tcp">gen_tcp(3) </seealso>. + </p> + + <p> <c>ssloption() = {verify, verify_type()} | + {fail_if_no_peer_cert, boolean()} + {depth, integer()} | + {certfile, path()} | {keyfile, path()} | {password, string()} | + {cacertfile, path()} | {dhfile, path()} | {ciphers, ciphers()} | + {ssl_imp, ssl_imp()} | {reuse_sessions, boolean()} | {reuse_session, fun()} + </c></p> + + <p><c>transportoption() = {CallbackModule, DataTag, ClosedTag} + - defaults to {gen_tcp, tcp, tcp_closed}. Ssl may be + run over any reliable transport protocol that has + an equivalent API to gen_tcp's.</c></p> + + <p><c> CallbackModule = + atom()</c> + </p> <p><c> DataTag = + atom() - tag used in socket data message.</c></p> + <p><c> ClosedTag = atom() - tag used in + socket close message.</c></p> + + <p><c>verify_type() = verify_none | verify_peer</c></p> + + <p><c>path() = string() - representing a file path.</c></p> + + <p><c>host() = hostname() | ipaddress()</c></p> + + <p><c>hostname() = string()</c></p> + + <p><c> + ip_address() = {N1,N2,N3,N4} % IPv4 + | {K1,K2,K3,K4,K5,K6,K7,K8} % IPv6 </c></p> + + <p><c>sslsocket() - opaque to the user. </c></p> + + <p><c>protocol() = sslv3 | tlsv1 </c></p> + + <p><c>ciphers() = [ciphersuite()] | string() (according to old API)</c></p> + + <p><c>ciphersuite() = + {key_exchange(), cipher(), hash()}</c></p> + + <p><c>key_exchange() = rsa | dhe_dss | dhe_rsa + </c></p> + + <p><c>cipher() = rc4_128 | des_cbc | '3des_ede_cbc' + | aes_128_cbc | aes_256_cbc </c></p> + + <p> <c>hash() = md5 | sha + </c></p> + + <p><c>ssl_imp() = new | old - default is new.</c></p> + + </section> + +<section> + <title>SSL OPTION DESCRIPTIONS</title> + + <taglist> + <tag>{verify, verify_type()}</tag> + <item> If <c>verify_none</c> is specified x509-certificate + path validation errors at the client side + will not automatically cause the connection to fail, as + it will if the verify type is <c>verify_peer</c>. See also + the option verify_fun. + Servers only do the path validation if <c>verify_peer</c> is set to + true, as it then will + send a certificate request to + the client (this message is not sent if the verify option is + <c>verify_none</c>) and you may then also want to specify + the option <c>fail_if_no_peer_cert</c>. </item> - <item> - <p><c></c></p> + + <tag>{fail_if_no_peer_cert, boolean()}</tag> + <item>Used together with {verify, verify_peer} by a ssl server. + If set to true, + the server will fail if the client does not have a certificate + to send, e.i sends a empty certificate, if set to false it will + only fail if the client sends a invalid certificate (an empty + certificate is considered valid). + </item> + + <tag>{verify_fun, fun(ErrorList) -> boolean()}</tag> + <item>Used by the ssl client to determine if + x509-certificate path validations errors are acceptable or + if the connection should fail. Defaults to: + +<code> +fun(ErrorList) -> + case lists:foldl(fun({bad_cert,unknown_ca}, Acc) -> + Acc; + (Other, Acc) -> + [Other | Acc] + end, [], ErrorList) of + [] -> + true; + [_|_] -> + false + end +end +</code> + I.e. by default if the only error found was that the CA-certificate + holder was unknown this will be accepted. + + Possible errors in the error list are: + {bad_cert, cert_expired}, {bad_cert, invalid_issuer}, + {bad_cert, invalid_signature}, {bad_cert, name_not_permitted}, + {bad_cert, unknown_ca}, + {bad_cert, cert_expired}, {bad_cert, invalid_issuer}, + {bad_cert, invalid_signature}, {bad_cert, name_not_permitted}, + {bad_cert, cert_revoked} (not implemented yet), + {bad_cert, unknown_critical_extension} or {bad_cert, term()} </item> - </list> - <p>The socket option <c>{backlog, integer()}</c> is for - <c>listen/2</c> only, and the option <c>{port, integer()}</c> - is for <c>connect/3/4</c> only. - </p> - <p>The following socket options are set by default: <c>{mode, list}</c>, <c>{packet, 0}</c>, <c>{header, 0}</c>, <c>{nodelay, false}</c>, <c>{active, true}</c>, <c>{backlog, 5}</c>, - <c>{ip, {0,0,0,0}}</c>, and <c>{port, 0}</c>. - </p> - <p>Note that the options <c>{mode, binary}</c> and <c>binary</c> - are equivalent. Similarly <c>{mode, list}</c> and the absence of - option <c>binary</c> are equivalent. - </p> - <p>The ssl options are for setting specific SSL parameters as follows: - </p> - <list type="bulleted"> - <item> - <p><c>{verify, code()}</c> Specifies type of verification: - 0 = do not verify peer; 1 = verify peer, 2 = verify peer, - fail if no peer certificate. The default value is 0. - </p> + + + <tag>{validate_extensions_fun, fun()}</tag> + <item> + This options makes it possible to supply a fun to validate + possible application specific certificate extensions + during the certificat path validation. This option + will be better documented onec the public_key API is more + mature. + </item> + + <tag>{depth, integer()}</tag> + <item>Specifies the maximum + verification depth, i.e. how far in a chain of certificates the + verification process can proceed before the verification is + considered to fail. Peer certificate = 0, CA certificate = 1, + higher level CA certificate = 2, etc. The value 2 thus means + that a chain can at most contain peer cert, CA cert, next CA + cert, and an additional CA cert. The default value is 1. </item> - <item> - <p><c>{depth, depth()}</c> Specifies the maximum - verification depth, i.e. how far in a chain of certificates - the verification process can proceed before the verification - is considered to fail. - </p> - <p>Peer certificate = 0, CA certificate = 1, higher level CA - certificate = 2, etc. The value 2 thus means that a chain - can at most contain peer cert, CA cert, next CA cert, and an - additional CA cert. - </p> - <p>The default value is 1. - </p> + + <tag>{certfile, path()}</tag> + <item>Path to a file containing the + user's certificate. Optional for clients but note + that some servers requires that the client can certify + itself. </item> + <tag>{keyfile, path()}</tag> + <item>Path to file containing user's + private PEM encoded key. As PEM-files may contain several + entries this option defaults to the same file as given by + certfile option.</item> + <tag>{password, string()}</tag> + <item>String containing the user's password. + Only used if the private keyfile is password protected. + </item> + <tag>{cacertfile, path()}</tag> + <item>Path to file containing PEM encoded + CA certificates (trusted certificates used for verifying a peer + certificate). May be omitted if you do not want to verify + the peer.</item> + + <tag>{dhfile, path()}</tag> + <item>Path to file containing PEM encoded Diffie Hellman parameters, + for the server to use if a cipher suite using Diffie Hellman key exchange + is negotiated. If not specified hardcode parameters will be used. </item> - <item> - <p><c>{certfile, path()}</c> Path to a file containing the - user's certificate. - chain of PEM encoded certificates.</p> + + <tag>{ciphers, ciphers()}</tag> + <item>The function <c>ciphers_suites/0</c> can + be used to find all available ciphers. </item> - <item> - <p><c>{keyfile, path()}</c> Path to file containing user's - private PEM encoded key.</p> + + <tag>{ssl_imp, ssl_imp()}</tag> + <item>Specify which ssl implementation you want to use. Defaults to + new. </item> - <item> - <p><c>{password, string()}</c> String containing the user's - password. Only used if the private keyfile is password protected.</p> + + <tag>{reuse_sessions, boolean()}</tag> + <item>Specifies if ssl sessions should be reused + when possible. </item> - <item> - <p><c>{cacertfile, path()}</c> Path to file containing PEM encoded - CA certificates (trusted certificates used for verifying a peer - certificate).</p> + + <tag>{reuse_session, fun(SuggestedSessionId, + PeerCert, Compression, CipherSuite) -> boolean()}</tag> + <item>Enables the ssl server to have a local policy + for deciding if a session should be reused or not, + only meaning full if <c>reuse_sessions</c> is set to true. + SuggestedSessionId is a binary(), PeerCert is a DER encoded + certificate, Compression is an enumeration integer + and CipherSuite of type ciphersuite(). </item> - <item> - <p><c>{ciphers, string()}</c> String of ciphers as a colon - separated list of ciphers. The function <c>ciphers/0</c> can - be used to find all available ciphers.</p> + + <tag>{secure_renegotiate, boolean()}</tag> + <item>Specifies if to reject renegotiation attempt that does + not live up to RFC 5746. By default secure_renegotiate is + set to false e.i. secure renegotiation will be used if possible + but it will fallback to unsecure renegotiation if the peer + does not support RFC 5746. </item> - </list> - <p>The type <c>sslsocket()</c> is opaque to the user. - </p> - <p>The owner of a socket is the one that created it by a call to - <c>transport_accept/[1,2]</c>, <c>connect/[3,4]</c>, - or <c>listen/2</c>. - </p> - <p>When a socket is in active mode (the default), data from the + + </taglist> + </section> + + <section> + <title>General</title> + + <p>When a ssl socket is in active mode (the default), data from the socket is delivered to the owner of the socket in the form of messages: - </p> + </p> <list type="bulleted"> - <item> - <p><c>{ssl, Socket, Data}</c></p> + <item>{ssl, Socket, Data} </item> - <item> - <p><c>{ssl_closed, Socket}</c></p> + <item>{ssl_closed, Socket} </item> <item> - <p><c>{ssl_error, Socket, Reason}</c></p> + {ssl_error, Socket, Reason} </item> </list> + <p>A <c>Timeout</c> argument specifies a timeout in milliseconds. The default value for a <c>Timeout</c> argument is <c>infinity</c>. - </p> - <p>Functions listed below may return the value <c>{error, closed}</c>, which only indicates that the SSL socket is - considered closed for the operation in question. It is for - instance possible to have <c>{error, closed}</c> returned from - an call to <c>send/2</c>, and a subsequent call to <c>recv/3</c> - returning <c>{ok, Data}</c>. - </p> - <p>Hence a return value of <c>{error, closed}</c> must not be - interpreted as if the socket was completely closed. On the - contrary, in order to free all resources occupied by an SSL - socket, <c>close/1</c> must be called, or else the process owning - the socket has to terminate. - </p> - <p>For each SSL socket there is an Erlang process representing the - socket. When a socket is opened, that process links to the - calling client process. Implementations that want to detect - abnormal exits from the socket process by receiving <c>{'EXIT', Pid, Reason}</c> messages, should use the function <c>pid/1</c> - to retrieve the process identifier from the socket, in order to - be able to match exit messages properly.</p> + </p> </section> + <funcs> <func> - <name>ciphers() -> {ok, string()} | {error, enotstarted}</name> - <fsummary>Get supported ciphers.</fsummary> - <desc> - <p>Returns a string consisting of colon separated cipher - designations that are supported by the current SSL library - implementation. - </p> - <p>The SSL application has to be started to return the string - of ciphers.</p> - </desc> + <name>cipher_suites() -></name> + <name>cipher_suites(Type) -> ciphers()</name> + <fsummary> Returns a list of supported cipher suites</fsummary> + <type> + <v>Type = erlang | openssl</v> + + </type> + <desc><p>Returns a list of supported cipher suites. + cipher_suites() is equivalent to cipher_suites(erlang). + Type openssl is provided for backwards compatibility with + old ssl that used openssl. + </p> + </desc> </func> + <func> - <name>close(Socket) -> ok | {error, Reason}</name> - <fsummary>Close a socket returned by <c>transport_accept/[1,2]</c>, <c>connect/3/4</c>, or <c>listen/2</c>.</fsummary> + <name>connect(Socket, SslOptions) -> </name> + <name>connect(Socket, SslOptions, Timeout) -> {ok, SslSocket} + | {error, Reason}</name> + <fsummary> Upgrades a gen_tcp, or + equivalent, connected socket to a ssl socket. </fsummary> <type> - <v>Socket = sslsocket()</v> + <v>Socket = socket()</v> + <v>SslOptions = [ssloption()]</v> + <v>Timeout = integer() | infinity</v> + <v>SslSocket = sslsocket()</v> + <v>Reason = term()</v> </type> - <desc> - <p>Closes a socket returned by <c>transport_accept/[1,2]</c>, - <c>connect/[3,4]</c>, or <c>listen/2</c></p> - </desc> + <desc> <p>Upgrades a gen_tcp, or equivalent, + connected socket to a ssl socket e.i performs the + client-side ssl handshake.</p> + </desc> </func> + <func> - <name>connect(Address, Port, Options) -> {ok, Socket} | {error, Reason}</name> - <name>connect(Address, Port, Options, Timeout) -> {ok, Socket} | {error, Reason}</name> - <fsummary>Connect to <c>Port</c>at <c>Address</c>.</fsummary> + <name>connect(Host, Port, Options) -></name> + <name>connect(Host, Port, Options, Timeout) -> + {ok, SslSocket} | {error, Reason}</name> + <fsummary>Opens an ssl connection to Host, Port. </fsummary> <type> - <v>Address = address()</v> - <v>Port = integer()</v> - <v>Options = [connect_option()]</v> - <v>connect_option() = {mode, list} | {mode, binary} | binary | {packet, packettype()} | {header, integer()} | {nodelay, boolean()} | {active, activetype()} | {ip, ipaddress()} | {port, integer()} | {verify, code()} | {depth, depth()} | {certfile, path()} | {keyfile, path()} | {password, string()} | {cacertfile, path()} | {ciphers, string()}</v> - <v>Timeout = integer()</v> - <v>Socket = sslsocket()</v> + <v>Host = host()</v> + <v>Port = integer()</v> + <v>Options = [option()]</v> + <v>Timeout = integer() | infinity</v> + <v>SslSocket = sslsocket()</v> + <v>Reason = term()</v> </type> - <desc> - <p>Connects to <c>Port</c> at <c>Address</c>. If the optional - <c>Timeout</c> argument is specified, and a connection could not - be established within the given time, <c>{error, timeout}</c> is - returned. The default value for <c>Timeout</c> is <c>infinity</c>. - </p> - <p>The <c>ip</c> and <c>port</c> options are for binding to a - particular <em>local</em> address and port, respectively.</p> - </desc> + <desc> <p>Opens an ssl connection to Host, Port.</p> </desc> </func> + <func> - <name>connection_info(Socket) -> {ok, {Protocol, Cipher}} | {error, Reason}</name> - <fsummary>Get current protocol version and cipher.</fsummary> + <name>close(SslSocket) -> ok | {error, Reason}</name> + <fsummary>Close a ssl connection</fsummary> <type> - <v>Socket = sslsocket()</v> - <v>Protocol = protocol()</v> - <v>Cipher = string()</v> + <v>SslSocket = sslsocket()</v> + <v>Reason = term()</v> </type> - <desc> - <p>Gets the chosen protocol version and cipher for an established - connection (accepted och connected). </p> + <desc><p>Close a ssl connection.</p> + </desc> + </func> + + <func> + <name>controlling_process(SslSocket, NewOwner) -> + ok | {error, Reason}</name> + + <fsummary>Assigns a new controlling process to the + ssl-socket.</fsummary> + + <type> + <v>SslSocket = sslsocket()</v> + <v>NewOwner = pid()</v> + <v>Reason = term()</v> + </type> + <desc><p>Assigns a new controlling process to the ssl-socket. A + controlling process is the owner of a ssl-socket, and receives + all messages from the socket.</p> </desc> </func> + <func> - <name>controlling_process(Socket, NewOwner) -> ok | {error, Reason}</name> - <fsummary>Assign a new controlling process to the socket.</fsummary> + <name>connection_info(SslSocket) -> + {ok, {ProtocolVersion, CipherSuite}} | {error, Reason} </name> + <fsummary>Returns the negotiated protocol version and cipher suite. + </fsummary> <type> - <v>Socket = sslsocket()</v> - <v>NewOwner = pid()</v> + <v>CipherSuite = ciphersuite()</v> + <v>ProtocolVersion = protocol()</v> </type> - <desc> - <p>Assigns a new controlling process to <c>Socket</c>. A controlling - process is the owner of a socket, and receives all messages from - the socket.</p> + <desc><p>Returns the negotiated protocol version and cipher suite.</p> </desc> </func> - <func> - <name>format_error(ErrorCode) -> string()</name> + + <func> + <name>format_error(Reason) -> string()</name> <fsummary>Return an error string.</fsummary> <type> - <v>ErrorCode = term()</v> + <v>Reason = term()</v> </type> <desc> - <p>Returns a diagnostic string describing an error.</p> + <p>Presents the error returned by an ssl function as a printable string.</p> </desc> </func> + <func> - <name>getopts(Socket, OptionsTags) -> {ok, Options} | {error, Reason}</name> - <fsummary>Get options set for socket</fsummary> + <name>getopts(Socket) -> </name> + <name>getopts(Socket, OptionNames) -> + {ok, [socketoption()]} | {error, Reason}</name> + <fsummary>Get the value of the specified options.</fsummary> <type> - <v>Socket = sslsocket()</v> - <v>OptionTags = [optiontag()]()</v> + <v>Socket = sslsocket()</v> + <v>OptionNames = [property()]</v> </type> <desc> - <p>Returns the options the tags of which are <c>OptionTags</c> for - for the socket <c>Socket</c>. </p> + <p>Get the value of the specified socket options, if no + options are specified all options are returned. + </p> </desc> </func> + <func> - <name>listen(Port, Options) -> {ok, ListenSocket} | {error, Reason}</name> - <fsummary>Set up a socket to listen on a port on the local host.</fsummary> + <name>listen(Port, Options) -> + {ok, ListenSocket} | {error, Reason}</name> + <fsummary>Creates a ssl listen socket.</fsummary> <type> - <v>Port = integer()</v> - <v>Options = [listen_option()]</v> - <v>listen_option() = {mode, list} | {mode, binary} | binary | {packet, packettype()} | {header, integer()} | {active, activetype()} | {backlog, integer()} | {ip, ipaddress()} | {verify, code()} | {depth, depth()} | {certfile, path()} | {keyfile, path()} | {password, string()} | {cacertfile, path()} | {ciphers, string()}</v> - <v>ListenSocket = sslsocket()</v> + <v>Port = integer()</v> + <v>Options = options()</v> + <v>ListenSocket = sslsocket()</v> </type> <desc> - <p>Sets up a socket to listen on port <c>Port</c> at the local host. - If <c>Port</c> is zero, <c>listen/2</c> picks an available port - number (use <c>port/1</c> to retrieve it). - </p> - <p>The listen queue size defaults to 5. If a different value is - wanted, the option <c>{backlog, Size}</c> should be added to the - list of options. - </p> - <p>An empty <c>Options</c> list is considered an error, and - <c>{error, enooptions}</c> is returned. - </p> - <p>The returned <c>ListenSocket</c> can only be used in calls to - <c>transport_accept/[1,2]</c>.</p> + <p>Creates a ssl listen socket.</p> </desc> </func> + <func> - <name>peercert(Socket) -> {ok, Cert} | {error, Reason}</name> + <name>peercert(Socket) -> {ok, Cert} | {error, Reason}</name> <fsummary>Return the peer certificate.</fsummary> - <type> + <type> <v>Socket = sslsocket()</v> - <v>Cert = binary()()</v> - <v>Subject = term()()</v> + <v>Cert = binary()</v> </type> <desc> - <p>Returns the DER encoded peer certificate, the certificate can be decoded with - <c>public_key:pkix_decode_cert/2</c>. - </p> + <p>The peer certificate is returned as a DER encoded binary. + The certificate can be decoded with <c>public_key:pkix_decode_cert/2</c>. + </p> </desc> </func> <func> - <name>peername(Socket) -> {ok, {Address, Port}} | {error, Reason}</name> + <name>peername(Socket) -> {ok, {Address, Port}} | + {error, Reason}</name> <fsummary>Return peer address and port.</fsummary> <type> <v>Socket = sslsocket()</v> @@ -372,67 +446,47 @@ <p>Returns the address and port number of the peer.</p> </desc> </func> + <func> - <name>pid(Socket) -> pid()</name> - <fsummary>Return the pid of the socket process.</fsummary> - <type> - <v>Socket = sslsocket()</v> - </type> - <desc> - <p>Returns the pid of the socket process. The returned pid should - only be used for receiving exit messages.</p> - </desc> - </func> - <func> - <name>recv(Socket, Length) -> {ok, Data} | {error, Reason}</name> - <name>recv(Socket, Length, Timeout) -> {ok, Data} | {error, Reason}</name> - <fsummary>Receive data on socket.</fsummary> + <name>recv(Socket, Length) -> </name> + <name>recv(Socket, Length, Timeout) -> {ok, Data} | {error, + Reason}</name> + <fsummary>Receive data on a socket.</fsummary> <type> <v>Socket = sslsocket()</v> - <v>Length = integer() >= 0</v> + <v>Length = integer()</v> <v>Timeout = integer()</v> - <v>Data = bytes() | binary()</v> + <v>Data = [char()] | binary()</v> </type> <desc> - <p>Receives data on socket <c>Socket</c> when the socket is in - passive mode, i.e. when the option <c>{active, false}</c> - has been specified. - </p> - <p>A notable return value is <c>{error, closed}</c> which - indicates that the socket is closed. - </p> - <p>A positive value of the <c>Length</c> argument is only - valid when the socket is in raw mode (option <c>{packet, 0}</c> is set, and the option <c>binary</c> is <em>not</em> - set); otherwise it should be set to 0, whence all available - bytes are returned. - </p> - <p>If the optional <c>Timeout</c> parameter is specified, and - no data was available within the given time, <c>{error, timeout}</c> is returned. The default value for - <c>Timeout</c> is <c>infinity</c>.</p> + <p>This function receives a packet from a socket in passive + mode. A closed socket is indicated by a return value + <c>{error, closed}</c>.</p> + <p>The <c>Length</c> argument is only meaningful when + the socket is in <c>raw</c> mode and denotes the number of + bytes to read. If <c>Length</c> = 0, all available bytes are + returned. If <c>Length</c> > 0, exactly <c>Length</c> + bytes are returned, or an error; possibly discarding less + than <c>Length</c> bytes of data when the socket gets closed + from the other side.</p> + <p>The optional <c>Timeout</c> parameter specifies a timeout in + milliseconds. The default value is <c>infinity</c>.</p> </desc> </func> + <func> - <name>seed(Data) -> ok | {error, Reason}</name> - <fsummary>Seed the ssl random generator.</fsummary> + <name>renegotiate(Socket) -> ok | {error, Reason}</name> + <fsummary> Initiates a new handshake.</fsummary> <type> - <v>Data = iolist() | binary()</v> + <v>Socket = sslsocket()</v> </type> - <desc> - <p>Seeds the ssl random generator. - </p> - <p>It is strongly advised to seed the random generator after - the ssl application has been started, and before any - connections are established. Although the port program - interfacing to the OpenSSL libraries does a "random" seeding - of its own in order to make everything work properly, that - seeding is by no means random for the world since it has a - constant value which is known to everyone reading the source - code of the seeding. - </p> - <p>A notable return value is <c>{error, edata}}</c> indicating that - <c>Data</c> was not a binary nor an iolist.</p> + <desc><p>Initiates a new handshake. A notable return value is + <c>{error, renegotiation_rejected}</c> indicating that the peer + refused to go through with the renegotiation but the connection + is still active using the previously negotiated session.</p> </desc> </func> + <func> <name>send(Socket, Data) -> ok | {error, Reason}</name> <fsummary>Write data to a socket.</fsummary> @@ -458,26 +512,65 @@ <c>Socket</c>. </p> </desc> </func> + <func> - <name>ssl_accept(Socket) -> ok | {error, Reason}</name> - <name>ssl_accept(Socket, Timeout) -> ok | {error, Reason}</name> - <fsummary>Perform server-side SSL handshake and key exchange</fsummary> + <name>shutdown(Socket, How) -> ok | {error, Reason}</name> + <fsummary>Immediately close a socket</fsummary> <type> <v>Socket = sslsocket()</v> + <v>How = read | write | read_write</v> + <v>Reason = reason()</v> + </type> + <desc> + <p>Immediately close a socket in one or two directions.</p> + <p><c>How == write</c> means closing the socket for writing, + reading from it is still possible.</p> + <p>To be able to handle that the peer has done a shutdown on + the write side, the <c>{exit_on_close, false}</c> option + is useful.</p> + </desc> + </func> + + <func> + <name>ssl_accept(ListenSocket) -> </name> + <name>ssl_accept(ListenSocket, Timeout) -> ok | {error, Reason}</name> + <fsummary>Perform server-side SSL handshake</fsummary> + <type> + <v>ListenSocket = sslsocket()</v> <v>Timeout = integer()</v> - <v>Reason = atom()</v> + <v>Reason = term()</v> </type> <desc> <p>The <c>ssl_accept</c> function establish the SSL connection on the server side. It should be called directly after <c>transport_accept</c>, in the spawned server-loop.</p> - <p>Note that the ssl connection is not complete until <c>ssl_accept</c> - has returned <c>true</c>, and if an error is returned, the socket - is unavailable and for instance <c>close/1</c> will crash.</p> </desc> </func> + + <func> + <name>ssl_accept(ListenSocket, SslOptions) -> </name> + <name>ssl_accept(ListenSocket, SslOptions, Timeout) -> {ok, Socket} | {error, Reason}</name> + <fsummary>Perform server-side SSL handshake</fsummary> + <type> + <v>ListenSocket = socket()</v> + <v>SslOptions = ssloptions()</v> + <v>Timeout = integer()</v> + <v>Reason = term()</v> + </type> + <desc> + <p> Upgrades a gen_tcp, or + equivalent, socket to a ssl socket e.i performs the + ssl server-side handshake.</p> + <p><note>Note that the listen socket should be in {active, false} mode + before telling the client that the server is ready to upgrade + and calling this function, otherwise the upgrade may + or may not succeed depending on timing.</note></p> + </desc> + </func> + <func> - <name>sockname(Socket) -> {ok, {Address, Port}} | {error, Reason}</name> + <name>sockname(Socket) -> {ok, {Address, Port}} | + {error, Reason}</name> <fsummary>Return the local address and port.</fsummary> <type> <v>Socket = sslsocket()</v> @@ -489,217 +582,84 @@ <c>Socket</c>.</p> </desc> </func> + <func> - <name>transport_accept(Socket) -> {ok, NewSocket} | {error, Reason}</name> - <name>transport_accept(Socket, Timeout) -> {ok, NewSocket} | {error, Reason}</name> - <fsummary>Accept an incoming connection and prepare for <c>ssl_accept</c></fsummary> + <name>start() -> </name> + <name>start(Type) -> ok | {error, Reason}</name> + <fsummary>Starts the Ssl application. </fsummary> + <type> + <v>Type = permanent | transient | temporary</v> + </type> + <desc> + <p>Starts the Ssl application. Default type + is temporary. + <seealso marker="kernel:application">application(3)</seealso></p> + </desc> + </func> + <func> + <name>stop() -> ok </name> + <fsummary>Stops the Ssl application.</fsummary> + <desc> + <p>Stops the Ssl application. + <seealso marker="kernel:application">application(3)</seealso></p> + </desc> + </func> + + <func> + <name>transport_accept(Socket) -></name> + <name>transport_accept(Socket, Timeout) -> + {ok, NewSocket} | {error, Reason}</name> + <fsummary>Accept an incoming connection and + prepare for <c>ssl_accept</c></fsummary> <type> <v>Socket = NewSocket = sslsocket()</v> <v>Timeout = integer()</v> - <v>Reason = atom()</v> + <v>Reason = reason()</v> </type> <desc> <p>Accepts an incoming connection request on a listen socket. - <c>ListenSocket</c> must be a socket returned from <c>listen/2</c>. - The socket returned should be passed to <c>ssl_accept</c> to - complete ssl handshaking and establishing the connection.</p> + <c>ListenSocket</c> must be a socket returned from + <c>listen/2</c>. The socket returned should be passed to + <c>ssl_accept</c> to complete ssl handshaking and + establishing the connection.</p> <warning> <p>The socket returned can only be used with <c>ssl_accept</c>, no traffic can be sent or received before that call.</p> </warning> - <p>The accepted socket inherits the options set for <c>ListenSocket</c> - in <c>listen/2</c>.</p> - <p>The default value for <c>Timeout</c> is <c>infinity</c>. If - <c>Timeout</c> is specified, and no connection is accepted within - the given time, <c>{error, timeout}</c> is returned.</p> + <p>The accepted socket inherits the options set for + <c>ListenSocket</c> in <c>listen/2</c>.</p> + <p>The default + value for <c>Timeout</c> is <c>infinity</c>. If + <c>Timeout</c> is specified, and no connection is accepted + within the given time, <c>{error, timeout}</c> is + returned.</p> </desc> </func> + <func> - <name>version() -> {ok, {SSLVsn, CompVsn, LibVsn}}</name> - <fsummary>Return the version of SSL.</fsummary> + <name>versions() -> + [{SslAppVer, SupportedSslVer, AvailableSslVsn}]</name> + <fsummary>Returns version information relevant for the + ssl application.</fsummary> <type> - <v>SSLVsn = CompVsn = LibVsn = string()()</v> + <v>SslAppVer = string()</v> + <v>SupportedSslVer = [protocol()]</v> + <v>AvailableSslVsn = [protocol()]</v> </type> <desc> - <p>Returns the SSL application version (<c>SSLVsn</c>), the library - version used when compiling the SSL application port program - (<c>CompVsn</c>), and the actual library version used when - dynamically linking in runtime (<c>LibVsn</c>). - </p> - <p>If the SSL application has not been started, <c>CompVsn</c> and - <c>LibVsn</c> are empty strings. - </p> + <p> + Returns version information relevant for the + ssl application.</p> </desc> </func> - </funcs> - - <section> - <title>ERRORS</title> - <p>The possible error reasons and the corresponding diagnostic strings - returned by <c>format_error/1</c> are either the same as those defined - in the <c>inet(3)</c> reference manual, or as follows: - </p> - <taglist> - <tag><c>closed</c></tag> - <item> - <p>Connection closed for the operation in question. - </p> - </item> - <tag><c>ebadsocket</c></tag> - <item> - <p>Connection not found (internal error). - </p> - </item> - <tag><c>ebadstate</c></tag> - <item> - <p>Connection not in connect state (internal error). - </p> - </item> - <tag><c>ebrokertype</c></tag> - <item> - <p>Wrong broker type (internal error). - </p> - </item> - <tag><c>ecacertfile</c></tag> - <item> - <p>Own CA certificate file is invalid. - </p> - </item> - <tag><c>ecertfile</c></tag> - <item> - <p>Own certificate file is invalid. - </p> - </item> - <tag><c>echaintoolong</c></tag> - <item> - <p>The chain of certificates provided by peer is too long. - </p> - </item> - <tag><c>ecipher</c></tag> - <item> - <p>Own list of specified ciphers is invalid. - </p> - </item> - <tag><c>ekeyfile</c></tag> - <item> - <p>Own private key file is invalid. - </p> - </item> - <tag><c>ekeymismatch</c></tag> - <item> - <p>Own private key does not match own certificate. - </p> - </item> - <tag><c>enoissuercert</c></tag> - <item> - <p>Cannot find certificate of issuer of certificate provided - by peer. - </p> - </item> - <tag><c>enoservercert</c></tag> - <item> - <p>Attempt to do accept without having set own certificate. - </p> - </item> - <tag><c>enotlistener</c></tag> - <item> - <p>Attempt to accept on a non-listening socket. - </p> - </item> - <tag><c>enoproxysocket</c></tag> - <item> - <p>No proxy socket found (internal error). - </p> - </item> - <tag><c>enooptions</c></tag> - <item> - <p>The list of options is empty. - </p> - </item> - <tag><c>enotstarted</c></tag> - <item> - <p>The SSL application has not been started. - </p> - </item> - <tag><c>eoptions</c></tag> - <item> - <p>Invalid list of options. - </p> - </item> - <tag><c>epeercert</c></tag> - <item> - <p>Certificate provided by peer is in error. - </p> - </item> - <tag><c>epeercertexpired</c></tag> - <item> - <p>Certificate provided by peer has expired. - </p> - </item> - <tag><c>epeercertinvalid</c></tag> - <item> - <p>Certificate provided by peer is invalid. - </p> - </item> - <tag><c>eselfsignedcert</c></tag> - <item> - <p>Certificate provided by peer is self signed. - </p> - </item> - <tag><c>esslaccept</c></tag> - <item> - <p>Server SSL handshake procedure between client and server failed. - </p> - </item> - <tag><c>esslconnect</c></tag> - <item> - <p>Client SSL handshake procedure between client and server failed. - </p> - </item> - <tag><c>esslerrssl</c></tag> - <item> - <p>SSL protocol failure. Typically because of a fatal alert - from peer. - </p> - </item> - <tag><c>ewantconnect</c></tag> - <item> - <p>Protocol wants to connect, which is not supported in - this version of the SSL application. - </p> - </item> - <tag><c>ex509lookup</c></tag> - <item> - <p>Protocol wants X.509 lookup, which is not supported in - this version of the SSL application. - </p> - </item> - <tag><c>{badcall, Call}</c></tag> - <item> - <p>Call not recognized for current mode (active or passive) and - state of socket. - </p> - </item> - <tag><c>{badcast, Cast}</c></tag> - <item> - <p>Call not recognized for current mode (active or passive) and - state of socket. - </p> - </item> - <tag><c>{badinfo, Info}</c></tag> - <item> - <p>Call not recognized for current mode (active or passive) and - state of socket. - </p> - </item> - </taglist> - </section> - + </funcs> + <section> <title>SEE ALSO</title> - <p>gen_tcp(3), inet(3) public_key(3) </p> + <p><seealso marker="kernel:inet">inet(3) </seealso> and + <seealso marker="kernel:gen_tcp">gen_tcp(3) </seealso> + </p> </section> - -</erlref> +</erlref> diff --git a/lib/ssl/doc/src/ssl_app.xml b/lib/ssl/doc/src/ssl_app.xml index ae8bd87781..2ba6f48611 100644 --- a/lib/ssl/doc/src/ssl_app.xml +++ b/lib/ssl/doc/src/ssl_app.xml @@ -4,7 +4,7 @@ <appref> <header> <copyright> - <year>1999</year><year>2009</year> + <year>1999</year><year>2010</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -13,45 +13,20 @@ compliance with the License. You should have received a copy of the Erlang Public License along with this software. If not, it can be retrieved online at http://www.erlang.org/. - + Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. - + </legalnotice> <title>ssl</title> - <prepared>Peter Högfeldt</prepared> - <responsible>Peter Högfeldt</responsible> - <docno></docno> - <approved>Peter Högfeldt</approved> - <checked>Peter Högfeldt</checked> - <date>2005-03-10</date> - <rev>E</rev> <file>ssl_app.sgml</file> </header> <app>ssl</app> - <appsummary>The SSL Application</appsummary> - <description> - <p>The Secure Socket Layer (SSL) application provides secure - socket communication over TCP/IP. - </p> - </description> - - <section> - <title>Warning</title> - <p>In previous versions of Erlang/OTP SSL it was advised, as a - work-around, to set the operating system environment variable - <c>SSL_CERT_FILE</c> to point at a file containing CA - certificates. That variable is no longer needed, and is not - recognised by Erlang/OTP SSL any more. - </p> - <p>However, the OpenSSL package does interpret that environment - variable. Hence a setting of that variable might have - unpredictable effects on the Erlang/OTP SSL application. It is - therefore adviced to not used that environment variable at all.</p> - </section> + <appsummary>The SSL application provides secure communication over + sockets.</appsummary> <section> <title>Environment</title> @@ -61,115 +36,43 @@ </p> <p>Note that the environment parameters can be set on the command line, for instance,</p> - <p><c>erl ... -ssl protocol_version '[sslv2,sslv3]' ...</c>. + <p><c>erl ... -ssl protocol_version '[sslv3, tlsv1]' ...</c>. </p> <taglist> - <tag><c><![CDATA[ephemeral_rsa = true | false <optional>]]></c></tag> - <item> - <p>Enables all SSL servers (those that listen and accept) - to use ephemeral RSA key generation when a clients connect with - weak handshake cipher specifications, that need equally weak - ciphers from the server (i.e. obsolete restrictions on export - ciphers). Default is <c>false</c>. - </p> - </item> - <tag><c><![CDATA[debug = true | false <optional>]]></c></tag> - <item> - <p>Causes debug information to be written to standard - output. Default is <c>false</c>. - </p> - </item> - <tag><c><![CDATA[debugdir = path() | false <optional>]]></c></tag> - <item> - <p>Causes debug information output controlled by <c>debug</c> - and <c>msgdebug</c> to be printed to a file named - <c><![CDATA[ssl_esock.<pid>.log]]></c> in the directory specified by - <c>debugdir</c>, where <c><![CDATA[<pid>]]></c> is the operating system - specific textual representation of the process identifier - of the external port program of the SSL application. Default - is <c>false</c>, i.e. no log file is produced. - </p> - </item> - <tag><c><![CDATA[msgdebug = true | false <optional>]]></c></tag> + <tag><c><![CDATA[protocol_version = [sslv3|tlsv1] <optional>]]></c>.</tag> <item> - <p>Sets <c>debug = true</c> and causes also the contents - of low level messages to be printed to standard output. - Default is <c>false</c>. - </p> + <p>Protocol that will be supported by started clients and + servers. If this option is not set it will default to all + protocols currently supported by the erlang ssl application. + Note that this option may be overridden by the version option + to ssl:connect/[2,3] and ssl:listen/2. + </p> </item> - <tag><c><![CDATA[port_program = string() | false <optional>]]></c></tag> - <item> - <p>Name of port program. The default is <c>ssl_esock</c>. - </p> - </item> - <tag><c><![CDATA[protocol_version = [sslv2|sslv3|tlsv1] <optional>]]></c>.</tag> + + <tag><c><![CDATA[session_lifetime = integer() <optional>]]></c></tag> <item> - <p>Name of protocols to use. If this option is not set, - all protocols are assumed, i.e. the default value is - <c>[sslv2, sslv3, tlsv1]</c>. - </p> + <p>The lifetime of session data in seconds. + </p> </item> - <tag><c><![CDATA[proxylsport = integer() | false <optional>]]></c></tag> + + <tag><c><![CDATA[session_cb = atom() <optional>]]></c></tag> <item> - <p>Define the port number of the listen port of the - SSL port program. Almost never is this option needed. + <p> + Name of session cache callback module that implements + the ssl_session_cache_api behavior, defaults to + ssl_session_cache.erl. </p> </item> - <tag><c><![CDATA[proxylsbacklog = integer() | false <optional>]]></c></tag> + + <tag><c><![CDATA[session_cb_init_args = list() <optional>]]></c></tag> <item> - <p>Set the listen queue size of the listen port of the - SSL port program. The default is 128. - </p> + <p> + List of arguments to the init function in session cache + callback module, defaults to []. + </p> </item> - </taglist> - </section> - <section> - <title>OpenSSL libraries</title> - <p>The current implementation of the Erlang SSL application is - based on the <em>OpenSSL</em> package version 0.9.7 or higher. - There are source and binary releases on the web. - </p> - <p>Source releases of OpenSSL can be downloaded from the <url href="http://www.openssl.org">OpenSSL</url> project home page, - or mirror sites listed there. - </p> - <p>The same URL also contains links to some compiled binaries and - libraries of OpenSSL (see the <c>Related/Binaries</c> menu) of - which the <url href="http://www.shininglightpro.com/search.php?searchname=Win32+OpenSSL">Shining Light Productions Win32 and OpenSSL</url> pages are of - interest for the Win32 user. - </p> - <p>For some Unix flavours there are binary packages available - on the net. - </p> - <p>If you cannot find a suitable binary OpenSSL package, you - have to fetch an OpenSSL source release and compile it. - </p> - <p>You then have to compile and install the libraries - <c>libcrypto.so</c> and <c>libssl.so</c> (Unix), or the - libraries <c>libeay32.dll</c> and <c>ssleay32.dll</c> (Win32). - </p> - <p>For Unix The <c>ssl_esock</c> port program is delivered linked - to OpenSSL libraries in <c>/usr/local/lib</c>, but the default - dynamic linking will also accept libraries in <c>/lib</c> and - <c>/usr/lib</c>. - </p> - <p>If that is not applicable to the particular Unix operating - system used, the example <c>Makefile</c> in the SSL - <c>priv/obj</c> directory, should be used as a guide to - relinking the final version of the port program. - </p> - <p>For <c>Win32</c> it is only required that the libraries can be - found from the <c>PATH</c> environment variable, or that they - reside in the appropriate <c>SYSTEM32</c> directory; hence no - particular relinking is need. Hence no example <c>Makefile</c> - for Win32 is provided.</p> - </section> - - <section> - <title>Restrictions</title> - <p>Users must be aware of export restrictions and patent rights - concerning cryptographic software. - </p> + </taglist> </section> <section> @@ -178,5 +81,3 @@ </section> </appref> - - diff --git a/lib/ssl/doc/src/ssl_distribution.xml b/lib/ssl/doc/src/ssl_distribution.xml index c743cd67a3..4067fb8a22 100644 --- a/lib/ssl/doc/src/ssl_distribution.xml +++ b/lib/ssl/doc/src/ssl_distribution.xml @@ -32,7 +32,13 @@ <file>ssl_distribution.xml</file> </header> <p>This chapter describes how the Erlang distribution can use - SSL to get additional verification and security.</p> + SSL to get additional verification and security. + + <note><p>Note this + documentation is written for the old ssl implementation and + will be updated for the new one once this functionallity is + supported by the new implementation.</p></note> + </p> <section> <title>Introduction</title> diff --git a/lib/ssl/doc/src/ssl_protocol.xml b/lib/ssl/doc/src/ssl_protocol.xml index 3dc2332795..726b9a4eeb 100644 --- a/lib/ssl/doc/src/ssl_protocol.xml +++ b/lib/ssl/doc/src/ssl_protocol.xml @@ -13,337 +13,138 @@ compliance with the License. You should have received a copy of the Erlang Public License along with this software. If not, it can be retrieved online at http://www.erlang.org/. - + Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. - + </legalnotice> - <title>The SSL Protocol</title> - <prepared>Peter Högfeldt</prepared> - <docno></docno> - <date>2003-04-28</date> - <rev>PA2</rev> + <title>Transport Layer Security (TLS) and its predecessor, Secure Socket Layer (SSL)</title> <file>ssl_protocol.xml</file> </header> - <p>Here we provide a short introduction to the SSL protocol. We only - consider those part of the protocol that are important from a - programming point of view. - </p> - <p>For a very good general introduction to SSL and TLS see the book - <cite id="rescorla"></cite>. - </p> - <p><em>Outline:</em></p> - <list type="bulleted"> - <item>Two types of connections - connection: handshake, data transfer, and - shutdown - - SSL/TLS protocol - server must have certificate - what the the - server sends to the client - client may verify the server - - server may ask client for certificate - what the client sends to - the server - server may then verify the client - verification - - certificate chains - root certificates - public keys - key - agreement - purpose of certificate - references</item> - </list> + + <p>The erlang ssl application currently supports SSL 3.0 and TLS 1.0 + RFC 2246, and will in the future also support later versions of TLS. + SSL 2.0 is not supported. + </p> - <section> - <title>SSL Connections</title> - <p>The SSL protocol is implemented on top of the TCP/IP protocol. - From an endpoint view it also has the same type of connections - as that protocol, almost always created by calls to socket - interface functions <em>listen</em>, <em>accept</em> and - <em>connect</em>. The endpoints are <em>servers</em> and - <em>clients</em>. - </p> - <p>A <em>server</em><em>listen</em>s for connections on a - specific address and port. This is done once. The server then - <em>accept</em>s each connections on that same address and - port. This is typically done indefinitely many times. - </p> - <p>A <em>client</em> connects to a server on a specific address - and port. For each purpose this is done once. - </p> - <p>For a plain TCP/IP connection the establishment of a connection - (through an accept or a connect) is followed by data transfer between - the client and server, finally ended by a connection close. - </p> - <p>An SSL connection also consists of data transfer and connection - close, However, the data transfer contains encrypted data, and - in order to establish the encryption parameters, the data - transfer is preceded by an SSL <em>handshake</em>. In this - handshake the server plays a dominant role, and the main - instrument used in achieving a valid SSL connection is the - server's <em>certificate</em>. We consider certificates in the - next section, and the SSL handshake in a subsequent section.</p> - </section> + <p>By default erlang ssl is run over the TCP/IP protocol even + though you could plug in an other reliable transport protocol + with the same API as gen_tcp.</p> + + <p>If a client and server wants to use an upgrade mechanism, such as + defined by RFC2817, to upgrade a regular TCP/IP connection to a ssl + connection the erlang ssl API supports this. This can be useful for + things such as supporting HTTP and HTTPS on the same port and + implementing virtual hosting. + </p> <section> - <title>Certificates</title> - <p>A certificate is similar to a driver's license, or a - passport. The holder of the certificate is called the - <em>subject</em>. First of all the certificate identifies the - subject in terms of the name of the subject, its postal address, - country name, company name (if applicable), etc. - </p> - <p>Although a driver's license is always issued by a well-known and - distinct authority, a certificate may have an <em>issuer</em> - that is not so well-known. Therefore a certificate also always - contains information on the issuer of the certificate. That - information is of the same type as the information on the - subject. The issuer of a certificate also signs the certificate - with a <em>digital signature</em> (the signature is an inherent - part of the certificate), which allow others to verify that the - issuer really is the issuer of the certificate. - </p> - <p>Now that a certificate can be checked by verifying the - signature of the issuer, the question is how to trust the - issuer. The answer to this question is to require that there is - a certificate for the issuer as well. That issuer has in turn an - issuer, which must also have a certificate, and so on. This - <em>certificate chain</em> has to have en end, which then must - be a certificate that is trusted by other means. We shall cover - this problem of <em>authentication</em> in a subsequent - section. - </p> + <title>Security overview</title> + + <p>To achive authentication and privacy the client and server will + perform a TLS Handshake procedure before transmitting or receiving + any data. During the handshake they agree on a protocol version and + cryptographic algorithms, they generate shared secrets using public + key cryptographics and optionally authenticate each other with + digital certificates.</p> </section> - + <section> - <title>Encryption Algorithms</title> - <p>An encryption algorithm is a mathematical algorithm for - encryption and decryption of messages (arrays of bytes, - say). The algorithm as such is always required to be publicly - known, otherwise its strength cannot be evaluated, and hence it - cannot be used reliably. The secrecy of an encrypted message is - not achieved by the secrecy of the algorithm used, but by the - secrecy of the <em>keys</em> used as input to the encryption and - decryption algorithms. For an account of cryptography in general - see <cite id="schneier"></cite>. - </p> - <p>There are two classes of encryption algorithms: <em>symmetric key</em> algorithms and <em>public key</em> algorithms. Both - types of algorithms are used in the SSL protocol. - </p> - <p>In the sequel we assume holders of keys keep them secret (except - public keys) and that they in that sense are trusted. How a - holder of a secret key is proved to be the one it claims to be - is a question of <em>authentication</em>, which, in the context - of the SSL protocol, is described in a section further below. - </p> - - <section> - <title>Symmetric Key Algorithms</title> - <p>A <em>symmetric key</em> algorithm has one key only. The key - is used for both encryption and decryption. Obviously the key - of a symmetric key algorithm must always be kept secret by the - users of the key. DES is an example of a symmetric key - algorithm. - </p> - <p>Symmetric key algorithms are fast compared to public key - algorithms. They are therefore typically used for encrypting - bulk data. - </p> - </section> - - <section> - <title>Public Key Algorithms</title> - <p>A <em>public key</em> algorithm has two keys. Any of the two - keys can be used for encryption. A message encrypted with one - of the keys, can only be decrypted with the other key. One of - the keys is public (known to the world), while the other key - is private (i.e. kept secret) by the owner of the two keys. - </p> - <p>RSA is an example of a public key algorithm. - </p> - <p>Public key algorithms are slow compared to symmetric key - algorithms, and they are therefore seldom used for bulk data - encryption. They are therefore only used in cases where the - fact that one key is public and the other is private, provides - features that cannot be provided by symmetric algorithms. - </p> - </section> - - <section> - <title>Digital Signature Algorithms</title> - <p>An interesting feature of a public key algorithm is that its - public and private keys can both be used for encryption. - Anyone can use the public key to encrypt a message, and send - that message to the owner of the private key, and be sure of - that only the holder of the private key can decrypt the - message. - </p> - <p>On the other hand, the owner of the private key can encrypt a - message with the private key, thus obtaining an encrypted - message that can decrypted by anyone having the public key. - </p> - <p>The last approach can be used as a digital signature - algorithm. The holder of the private key signs an array of - bytes by performing a specified well-known <em>message digest algorithm</em> to compute a hash of the array, encrypts the - hash value with its private key, an then presents the original - array, the name of the digest algorithm, and the encryption of - the hash value as a <em>signed array of bytes</em>. - </p> - <p>Now anyone having the public key, can decrypt the encrypted - hash value with that key, compute the hash with the specified - digest algorithm, and check that the hash values compare equal - in order to verify that the original array was indeed signed - by the holder of the private key. - </p> - <p>What we have accounted for so far is by no means all that can - be said about digital signatures (see <cite id="schneier"></cite>for - further details). - </p> - </section> - - <section> - <title>Message Digests Algorithms</title> - <p>A message digest algorithm is a hash function that accepts - an array bytes of arbitrary but finite length of input, and - outputs an array of bytes of fixed length. Such an algorithm - is also required to be very hard to invert. - </p> - <p>MD5 (16 bytes output) and SHA1 (20 bytes output) are examples - of message digest algorithms. - </p> - </section> + <title>Data Privacy and Integrity</title> + + <p>A <em>symmetric key</em> algorithm has one key only. The key is + used for both encryption and decryption. These algoritms are fast + compared to public key algorithms (using two keys, a public and a + private one) and are therefore typically used for encrypting bulk + data. + </p> + + <p>The keys for the symmetric encryption are generated uniquely + for each connection and are based on a secret negotiated + in the TLS handshake. </p> + + <p>The TLS handsake protocol and data transfer is run on top of + the TLS Record Protocol that uses a keyed-hash MAC (Message + Authenticity Code), or HMAC, to protect the message's data + integrity. From the TLS RFC "A Message Authentication Code is a + one-way hash computed from a message and some secret data. It is + difficult to forge without knowing the secret data. Its purpose is + to detect if the message has been altered." + </p> + </section> - <section> - <title>SSL Handshake</title> - <p>The main purpose of the handshake performed before an an SSL - connection is established is to negotiate the encryption - algorithm and key to be used for the bulk data transfer between - the client and the server. We are writing <em>the</em> key, - since the algorithm to choose for bulk encryption one of the - symmetric algorithms. - </p> - <p>There is thus only one key to agree upon, and obviously that - key has to be kept secret between the client and the server. To - obtain that the handshake has to be encrypted as well. - </p> - <p>The SSL protocol requires that the server always sends its - certificate to the client in the beginning of the handshake. The - client then retrieves the server's public key from the - certificate, which means that the client can use the server's - public key to encrypt messages to the server, and the server can - decrypt those messages with its private key. Similarly, the - server can encrypt messages to the client with its private key, - and the client can decrypt messages with the server's public - key. It is thus is with the server's public and private keys - that messages in the handshake are encrypted and decrypted, and - hence the key agreed upon for symmetric encryption of bulk data - can be kept secret (there are more things to consider to really - keep it secret, see <cite id="rescorla"></cite>). - </p> - <p>The above indicates that the server does not care who is - connecting, and that only the client has the possibility to - properly identify the server based on the server's certificate. - That is indeed true in the minimal use of the protocol, but it - is possible to instruct the server to request the certificate of - the client, in order to have a means to identify the client, but - it is by no means required to establish an SSL connection. - </p> - <p>If a server request the client certificate, it verifies, as a - part of the protocol, that the client really holds the private - key of the certificate by sending the client a string of bytes - to encrypt with its private key, which the server then decrypts - with the client's public key, the result of which is compared - with the original string of bytes (a similar procedure is always - performed by the client when it has received the server's - certificate). - </p> - <p>The way clients and servers <em>authenticate</em> each other, - i.e. proves that their respective peers are what they claim to - be, is the topic of the next section. - </p> - </section> + <section> + <title>Digital Certificates</title> + <p>A certificate is similar to a driver's license, or a + passport. The holder of the certificate is called the + <em>subject</em>. The certificate is signed + with the private key of the issuer of the certificate. A chain + of trust is build by having the issuer in its turn being + certified by an other certificate and so on until you reach the + so called root certificate that is self signed e.i. issued + by itself.</p> + + <p>Certificates are issued by <em>certification + authorities</em> (<em>CA</em>s) only. There are a handful of + top CAs in the world that issue root certificates. You can + examine the certificates of several of them by clicking + through the menus of your web browser. + </p> + </section> + + <section> + <title>Authentication of Sender</title> + + <p>Authentication of the sender is done by public key path + validation as defined in RFC 3280. Simplified that means that + each certificate in the certificate chain is issued by the one + before, the certificates attributes are valid ones, and the + root cert is a trusted cert that is present in the trusted + certs database kept by the peer.</p> + + <p>The server will always send a certificate chain as part of + the TLS handshake, but the client will only send one if + the server requests it. If the client does not have + an appropriate certificate it may send an "empty" certificate + to the server.</p> + + <p>The client may choose to accept some path evaluation errors + for instance a web browser may ask the user if they want to + accept an unknown CA root certificate. The server, if it request + a certificate, will on the other hand not accept any path validation + errors. It is configurable if the server should accept + or reject an "empty" certificate as response to + a certificate request.</p> + </section> + + <section> + <title>TLS Sessions</title> + + <p>From the TLS RFC "A TLS session is an association between a + client and a server. Sessions are created by the handshake + protocol. Sessions define a set of cryptographic security + parameters, which can be shared among multiple + connections. Sessions are used to avoid the expensive negotiation + of new security parameters for each connection."</p> - <section> - <title>Authentication</title> - <p>As we have already seen the reception of a certificate from a - peer is not enough to prove that the peer is authentic. More - certificates are needed, and we have to consider how certificates - are issued and on what grounds. - </p> - <p>Certificates are issued by <em>certification authorities</em> - (<em>CA</em>s) only. They issue certificates both for other CAs - and ordinary users (which are not CAs). - </p> - <p>Certain CAs are <em>top CAs</em>, i.e. they do not have a - certificate issued by another CA. Instead they issue their own - certificate, where the subject and issuer part of the - certificate are identical (such a certificate is called a - self-signed certificate). A top CA has to be well-known, and has - to have a publicly available policy telling on what grounds it - issues certificates. - </p> - <p>There are a handful of top CAs in the world. You can examine the - certificates of several of them by clicking through the menus of - your web browser. - </p> - <p>A top CA typically issues certificates for other CAs, called - <em>intermediate CAs</em>, but possibly also to ordinary users. Thus - the certificates derivable from a top CA constitute a tree, where - the leaves of the tree are ordinary user certificates. - </p> - <p>A <em>certificate chain</em> is an ordered sequence of - certificates, <c>C1, C2, ..., Cn</c>, say, where <c>C1</c> is a - top CA certificate, and where <c>Cn</c> is an ordinary user - certificate, and where the holder of <c>C1</c> is the issuer of - <c>C2</c>, the holder of <c>C2</c> is the issuer of <c>C3</c>, - ..., and the holder of <c>Cn-1</c> is the issuer of <c>Cn</c>, - the ordinary user certificate. The holders of <c>C2, C3, ..., Cn-1</c> are then intermediate CAs. - </p> - <p>Now to verify that a certificate chain is unbroken we have to - take the public key from each certificate <c>Ck</c>, and apply - that key to decrypt the signature of certificate <c>Ck-1</c>, - thus obtaining the message digest computed by the holder of the - <c>Ck</c> certificate, compute the real message digest of the - <c>Ck-1</c> certificate and compare the results. If they compare - equal the link of the chain between <c>Ck</c> and <c>Ck-1</c> is - considered to unbroken. This is done for each link k = 1, 2, - ..., n-1. If all links are found to be unbroken, the user - certificate <c>Cn</c> is considered authenticated. - </p> + <p>Session data is by default kept by the ssl application in a + memory storage hence session data will be lost at application + restart or takeover. Users may define their own callback module + to handle session data storage if persistent data storage is + required. Session data will also be invalidated after 24 hours + from it was saved, for security reasons. It is of course + possible to configure the amount of time the session data should be + saved.</p> - <section> - <title>Trusted Certificates</title> - <p>Now that there is a way to authenticate a certificate by - checking that all links of a certificate chain are unbroken, - the question is how you can be sure to trust the certificates - in the chain, and in particular the top CA certificate of the - chain. - </p> - <p>To provide an answer to that question consider the - perspective of a client, which have just received the - certificate of the server. In order to authenticate the server - the client has to construct a certificate chain and to prove - that the chain is unbroken. The client has to have a set of CA - certificates (top CA or intermediate CA certificates) not - obtained from the server, but obtained by other means. Those - certificates are kept <c>locally</c> by the client, and are - trusted by the client. - </p> - <p>More specifically, the client does not really have to have - top CA certificates in its local storage. In order to - authenticate a server it is sufficient for the client to - posses the trusted certificate of the issuer of the server - certificate. - </p> - <p>Now that is not the whole story. A server can send an - (incomplete) certificate chain to its client, and then the - task of the client is to construct a certificate chain that - begins with a trusted certificate and ends with the server's - certificate. (A client can also send a chain to its server, - provided the server requested the client's certificate.) - </p> - <p>All this means that an unbroken certificate chain begins with - a trusted certificate (top CA or not), and ends with the peer - certificate. That is the end of the chain is obtained from the - peer, but the beginning of the chain is obtained from local - storage, which is considered trusted. - </p> - </section> - </section> -</chapter> + <p>Ssl clients will by default try to reuse an available session, + ssl servers will by default agree to reuse sessions when clients + ask to do so.</p> + + </section> + </chapter> diff --git a/lib/ssl/doc/src/ssl_session_cache_api.xml b/lib/ssl/doc/src/ssl_session_cache_api.xml new file mode 100644 index 0000000000..7b70c6cf34 --- /dev/null +++ b/lib/ssl/doc/src/ssl_session_cache_api.xml @@ -0,0 +1,158 @@ +<?xml version="1.0" encoding="latin1" ?> +<!DOCTYPE erlref SYSTEM "erlref.dtd"> + +<erlref> + <header> + <copyright> + <year>1999</year><year>2010</year> + <holder>Ericsson AB. All Rights Reserved.</holder> + </copyright> + <legalnotice> + The contents of this file are subject to the Erlang Public License, + Version 1.1, (the "License"); you may not use this file except in + compliance with the License. You should have received a copy of the + Erlang Public License along with this software. If not, it can be + retrieved online at http://www.erlang.org/. + + Software distributed under the License is distributed on an "AS IS" + basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + the License for the specific language governing rights and limitations + under the License. + + </legalnotice> + <title>ssl</title> + <file>ssl_session_cache_api.xml</file> + </header> + <module>ssl_session_cache_api</module> + <modulesummary>Defines the API for the TLS session cache so + that the datastorge scheme can be replaced by + defining a new callback module implementing this API.</modulesummary> + + <section> + <title>Common Data Types</title> + + <p>The following data types are used in the functions below: + </p> + + <p><c>cache_ref() = opaque()</c></p> + + <p><c>key() = {partialkey(), session_id()}</c></p> + + <p><c>partialkey() = opaque()</c></p> + + <p><c>session_id() = binary()</c></p> + + <p><c>session() = opaque()</c></p> + + </section> + + <funcs> + + <func> + <name>delete(Cache, Key) -> _</name> + <fsummary></fsummary> + <type> + <v> Cache = cache_ref()</v> + <v> Key = key()</v> + </type> + <desc> + <p> Delets a cache entry. Will only be called from the cache + handling process. + </p> + </desc> + </func> + + <func> + <name>foldl(Fun, Acc0, Cache) -> Acc</name> + <fsummary></fsummary> + <type> + <v></v> + </type> + <desc> + <p>Calls Fun(Elem, AccIn) on successive elements of the + cache, starting with AccIn == Acc0. Fun/2 must return a new + accumulator which is passed to the next call. The function returns + the final value of the accumulator. Acc0 is returned if the cache is + empty. + </p> + </desc> + </func> + + <func> + <name>init() -> opaque() </name> + <fsummary>Return cache reference</fsummary> + <type> + <v></v> + </type> + <desc> + <p>Performes possible initializations of the cache and returns + a reference to it that will be used as parameter to the other + api functions. Will be called by the cache handling processes + init function, hence puting the same requierments on it as + a normal process init function. + </p> + </desc> + </func> + + <func> + <name>lookup(Cache, Key) -> Entry</name> + <fsummary> Looks up a cach entry.</fsummary> + <type> + <v> Cache = cache_ref()</v> + <v> Key = key()</v> + <v> Entry = session() | undefined </v> + </type> + <desc> + <p>Looks up a cach entry. Should be callable from any + process. + </p> + </desc> + </func> + + <func> + <name>select_session(Cache, PartialKey) -> [session()]</name> + <fsummary>>Selects sessions that could be reused.</fsummary> + <type> + <v> Cache = cache_ref()</v> + <v> PartialKey = partialkey()</v> + <v> Session = session()</v> + </type> + <desc> + <p>Selects sessions that could be reused. Should be callable + from any process. + </p> + </desc> + </func> + + <func> + <name>terminate(Cache) -> _</name> + <fsummary>Called by the process that handles the cache when it + is aboute to terminat.</fsummary> + <type> + <v>Cache = term() - as returned by init/0</v> + </type> + <desc> + <p>Takes care of possible cleanup that is needed when the + cache handling process terminates. + </p> + </desc> + </func> + + <func> + <name>update(Cache, Key, Session) -> _</name> + <fsummary> Caches a new session or updates a already cached one.</fsummary> + <type> + <v> Cache = cache_ref()</v> + <v> Key = key()</v> + <v> Session = session()</v> + </type> + <desc> + <p> Caches a new session or updates a already cached one. Will + only be called from the cache handling process. + </p> + </desc> + </func> + + </funcs> + +</erlref> diff --git a/lib/ssl/doc/src/usersguide.xml b/lib/ssl/doc/src/usersguide.xml index 98071f5742..6528c00a0b 100644 --- a/lib/ssl/doc/src/usersguide.xml +++ b/lib/ssl/doc/src/usersguide.xml @@ -4,7 +4,7 @@ <part xmlns:xi="http://www.w3.org/2001/XInclude"> <header> <copyright> - <year>2000</year><year>2009</year> + <year>2000</year><year>2010</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -13,43 +13,27 @@ compliance with the License. You should have received a copy of the Erlang Public License along with this software. If not, it can be retrieved online at http://www.erlang.org/. - + Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. - + </legalnotice> <title>SSL User's Guide</title> <prepared>OTP Team</prepared> - <docno></docno> <date>2003-05-26</date> - <rev>B</rev> <file>usersguide.sgml</file> </header> <description> <p>The <em>SSL</em> application provides secure communication over sockets. </p> - <p>This product includes software developed by the OpenSSL Project for - use in the OpenSSL Toolkit (http://www.openssl.org/). - </p> - <p>This product includes cryptographic software written by Eric Young - ([email protected]). - </p> - <p>This product includes software written by Tim Hudson - ([email protected]). - </p> - <p>For full OpenSSL and SSLeay license texts, see <seealso marker="licenses#licenses">Licenses</seealso>. - </p> </description> <xi:include href="ssl_protocol.xml"/> <xi:include href="using_ssl.xml"/> - <xi:include href="pkix_certs.xml"/> - <xi:include href="create_certs.xml"/> <xi:include href="ssl_distribution.xml"/> - <xi:include href="licenses.xml"/> </part> diff --git a/lib/ssl/doc/src/using_ssl.xml b/lib/ssl/doc/src/using_ssl.xml index ba74dcfef4..4bdd8f97b4 100644 --- a/lib/ssl/doc/src/using_ssl.xml +++ b/lib/ssl/doc/src/using_ssl.xml @@ -21,93 +21,129 @@ </legalnotice> - <title>Using the SSL application</title> - <prepared>Peter Högfeldt</prepared> - <docno></docno> - <date>2003-04-23</date> - <rev>PA2</rev> + <title>Using the SSL API</title> <file>using_ssl.xml</file> </header> - <p>Here we provide an introduction to using the Erlang/OTP SSL - application, which is accessed through the <c>ssl</c> interface - module. - </p> - <p>We also present example code in the Erlang module - <c>client_server</c>, also provided in the directory - <c>ssl-X.Y.Z/examples</c>, with source code in <c>src</c> and the - compiled module in <c>ebin</c> of that directory. - </p> <section> - <title>The ssl Module</title> - <p>The <c>ssl</c> module provides the user interface to the Erlang/OTP - SSL application. The interface functions provided are very similar - to those provided by the <c>gen_tcp</c> and <c>inet</c> modules. - </p> - <p>Servers use the interface functions <c>listen</c> and - <c>accept</c>. The <c>listen</c> function specifies a TCP port - to to listen to, and each call to the <c>accept</c> function - establishes an incoming connection. - </p> - <p>Clients use the <c>connect</c> function which specifies the address - and port of a server to connect to, and a successful call establishes - such a connection. - </p> - <p>The <c>listen</c> and <c>connect</c> functions have almost all - the options that the corresponding functions in <c>gen_tcp/</c> have, - but there are also additional options specific to the SSL protocol. - </p> - <p>The most important SSL specific option is the <c>cacertfile</c> - option which specifies a local file containing trusted CA - certificates which are and used for peer authentication. This - option is used by clients and servers in case they want to - authenticate their peers. - </p> - <p>The <c>certfile</c> option specifies a local path to a file - containing the certificate of the holder of the connection - endpoint. In case of a server endpoint this option is mandatory - since the contents of the sever certificate is needed in the - the handshake preceding the establishment of a connection. - </p> - <p>Similarly, the <c>keyfile</c> option points to a local file - containing the private key of the holder of the endpoint. If the - <c>certfile</c> option is present, this option has to be - specified as well, unless the private key is provided in the - same file as specified by the <c>certfile</c> option (a - certificate and a private key can thus coexist in the same file). - </p> - <p>The <c>verify</c> option specifies how the peer should be verified: - </p> - <taglist> - <tag>0</tag> - <item>Do not verify the peer,</item> - <tag>1</tag> - <item>Verify peer,</item> - <tag>2</tag> - <item>Verify peer, fail the verification if the peer has no - certificate. </item> - </taglist> - <p>The <c>depth</c> option specifies the maximum length of the - verification certificate chain. Depth = 0 means the peer - certificate, depth = 1 the CA certificate, depth = 2 the next CA - certificate etc. If the verification process does not find a - trusted CA certificate within the maximum length, the verification - fails. - </p> - <p>The <c>ciphers</c> option specifies which ciphers to use (a - string of colon separated cipher names). To obtain a list of - available ciphers, evaluate the <c>ssl:ciphers/0</c> function - (the SSL application has to be running). - </p> - </section> + <title>General information</title> + <p>To see relevant version information for ssl you can + call ssl:versions/0</p> + + <p>To see all supported cipher suites + call ssl:cipher_suites/0. Note that available cipher suites + for a connection will depend on your certificate. It is also + possible to specify a specific cipher suite(s) that you + want your connection to use. Default is to use the strongest + available.</p> - <section> - <title>A Client-Server Example</title> - <p>Here is a simple client server example. - </p> - <codeinclude file="../../examples/src/client_server.erl" tag="" type="erl"></codeinclude> </section> -</chapter> - - + + <section> + <title>Setting up connections</title> + + <p>Here follows some small example of how to set up client/server connections + using the erlang shell. The returned value of the sslsocket has been abbreviated with + <c>[...]</c> as it can be fairly large and is opaque.</p> + + <section> + <title>Minmal example</title> + + <note><p> The minimal setup is not the most secure setup of ssl.</p> + </note> + + <p> Start server side</p> + <code type="erl">1 server> ssl:start(). +ok</code> + + <p>Create a ssl listen socket</p> + <code type="erl">2 server> {ok, ListenSocket} = +ssl:listen(9999, [{certfile, "cert.pem"}, {keyfile, "key.pem"},{reuseaddr, true}]). +{ok,{sslsocket, [...]}}</code> + + <p>Do a transport accept on the ssl listen socket</p> + <code type="erl">3 server> {ok, Socket} = ssl:transport_accept(ListenSocket). +{ok,{sslsocket, [...]}}</code> + <p>Start client side</p> + <code type="erl">1 client> ssl:start(). +ok</code> + + <code type="erl">2 client> {ok, Socket} = ssl:connect("localhost", 9999, [], infinity). +{ok,{sslsocket, [...]}}</code> + + <p>Do the ssl handshake</p> + <code type="erl">4 server> ok = ssl:ssl_accept(Socket). +ok</code> + + <p>Send a messag over ssl</p> + <code type="erl">5 server> ssl:send(Socket, "foo"). +ok</code> + + <p>Flush the shell message queue to see that we got the message + sent on the server side</p> + <code type="erl">3 client> flush(). +Shell got {ssl,{sslsocket,[...]},"foo"} +ok</code> + </section> + + <section> + <title>Upgrade example</title> + + <note><p> To upgrade a TCP/IP connection to a ssl connection the + client and server have to aggre to do so. Agreement + may be accompliced by using a protocol such the one used by HTTP + specified in RFC 2817.</p> </note> + + <p>Start server side</p> + <code type="erl">1 server> ssl:start(). +ok</code> + + <p>Create a normal tcp listen socket</p> + <code type="erl">2 server> {ok, ListenSocket} = gen_tcp:listen(9999, [{reuseaddr, true}]). +{ok, #Port<0.475>}</code> + + <p>Accept client connection</p> + <code type="erl">3 server> {ok, Socket} = gen_tcp:accept(ListenSocket). +{ok, #Port<0.476>}</code> + + <p>Start client side</p> + <code type="erl">1 client> ssl:start(). +ok</code> + + <code type="erl">2 client> {ok, Socket} = gen_tcp:connect("localhost", 9999, [], infinity).</code> + + <p>Make sure active is set to false before trying + to upgrade a connection to a ssl connection, otherwhise + ssl handshake messages may be deliverd to the wrong process.</p> + <code type="erl">4 server> inet:setopts(Socket, [{active, false}]). +ok</code> + + <p>Do the ssl handshake.</p> + <code type="erl">5 server> {ok, SSLSocket} = ssl:ssl_accept(Socket, [{cacertfile, "cacerts.pem"}, +{certfile, "cert.pem"}, {keyfile, "key.pem"}]). +{ok,{sslsocket,[...]}}</code> + + <p> Upgrade to a ssl connection. Note that the client and server + must agree upon the upgrade and the server must call + ssl:accept/2 before the client calls ssl:connect/3.</p> + <code type="erl">3 client>{ok, SSLSocket} = ssl:connect(Socket, [{cacertfile, "cacerts.pem"}, +{certfile, "cert.pem"}, {keyfile, "key.pem"}], infinity). +{ok,{sslsocket,[...]}}</code> + + <p>Send a messag over ssl</p> + <code type="erl">4 client> ssl:send(SSLSocket, "foo"). +ok</code> + + <p>Set active true on the ssl socket</p> + <code type="erl">4 server> ssl:setopts(SSLSocket, [{active, true}]). +ok</code> + + <p>Flush the shell message queue to see that we got the message + sent on the client side</p> + <code type="erl">5 server> flush(). +Shell got {ssl,{sslsocket,[...]},"foo"} +ok</code> + </section> + </section> + </chapter> |