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-rw-r--r--lib/ssl/doc/src/Makefile23
-rw-r--r--lib/ssl/doc/src/book.xml21
-rw-r--r--lib/ssl/doc/src/notes.xml158
-rw-r--r--lib/ssl/doc/src/pkix_certs.xml21
-rw-r--r--lib/ssl/doc/src/refman.xml38
-rw-r--r--lib/ssl/doc/src/release_notes.xml21
-rw-r--r--lib/ssl/doc/src/ssl.xml1191
-rw-r--r--lib/ssl/doc/src/ssl_app.xml119
-rw-r--r--lib/ssl/doc/src/ssl_crl_cache.xml66
-rw-r--r--lib/ssl/doc/src/ssl_crl_cache_api.xml106
-rw-r--r--lib/ssl/doc/src/ssl_distribution.xml262
-rw-r--r--lib/ssl/doc/src/ssl_introduction.xml54
-rw-r--r--lib/ssl/doc/src/ssl_protocol.xml151
-rw-r--r--lib/ssl/doc/src/ssl_session_cache_api.xml138
-rw-r--r--lib/ssl/doc/src/usersguide.xml24
-rw-r--r--lib/ssl/doc/src/using_ssl.xml124
16 files changed, 1579 insertions, 938 deletions
diff --git a/lib/ssl/doc/src/Makefile b/lib/ssl/doc/src/Makefile
index fb12499ef7..669062779e 100644
--- a/lib/ssl/doc/src/Makefile
+++ b/lib/ssl/doc/src/Makefile
@@ -1,18 +1,19 @@
#
# %CopyrightBegin%
#
-# Copyright Ericsson AB 1999-2012. All Rights Reserved.
+# Copyright Ericsson AB 1999-2015. All Rights Reserved.
#
-# 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/.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
#
-# 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.
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
#
# %CopyrightEnd%
#
@@ -37,7 +38,7 @@ RELSYSDIR = $(RELEASE_PATH)/lib/$(APPLICATION)-$(VSN)
# Target Specs
# ----------------------------------------------------
XML_APPLICATION_FILES = refman.xml
-XML_REF3_FILES = ssl.xml ssl_session_cache_api.xml
+XML_REF3_FILES = ssl.xml ssl_crl_cache.xml ssl_crl_cache_api.xml ssl_session_cache_api.xml
XML_REF6_FILES = ssl_app.xml
XML_PART_FILES = release_notes.xml usersguide.xml
diff --git a/lib/ssl/doc/src/book.xml b/lib/ssl/doc/src/book.xml
index 317997b22b..a0890a028d 100644
--- a/lib/ssl/doc/src/book.xml
+++ b/lib/ssl/doc/src/book.xml
@@ -8,16 +8,17 @@
<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.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
diff --git a/lib/ssl/doc/src/notes.xml b/lib/ssl/doc/src/notes.xml
index 14df10b571..4d4a219b4f 100644
--- a/lib/ssl/doc/src/notes.xml
+++ b/lib/ssl/doc/src/notes.xml
@@ -8,16 +8,17 @@
<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.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
@@ -25,21 +26,152 @@
<file>notes.xml</file>
</header>
<p>This document describes the changes made to the SSL application.</p>
- <section><title>SSL 6.0.1.1</title>
+
+<section><title>SSL 7.1</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
- Gracefully ignore proprietary hash_sign algorithms</p>
+ Add DER encoded ECPrivateKey as valid input format for
+ key option.</p>
<p>
- Own Id: OTP-13151</p>
+ Own Id: OTP-12974</p>
+ </item>
+ <item>
+ <p>
+ Correct return value of default session callback module</p>
+ <p>
+ This error had the symptom that the client check for
+ unique session would always fail, potentially making the
+ client session table grow a lot and causing long setup
+ times.</p>
+ <p>
+ Own Id: OTP-12980</p>
+ </item>
+ </list>
+ </section>
+
+
+ <section><title>Improvements and New Features</title>
+ <list>
+ <item>
+ <p>
+ Add possibility to downgrade an SSL/TLS connection to a
+ tcp connection, and give back the socket control to a
+ user process.</p>
+ <p>
+ This also adds the possibility to specify a timeout to
+ the ssl:close function.</p>
+ <p>
+ Own Id: OTP-11397</p>
+ </item>
+ <item>
+ <p>
+ Add application setting to be able to change fatal alert
+ shutdown timeout, also shorten the default timeout. The
+ fatal alert timeout is the number of milliseconds between
+ sending of a fatal alert and closing the connection.
+ Waiting a little while improves the peers chances to
+ properly receiving the alert so it may shutdown
+ gracefully.</p>
+ <p>
+ Own Id: OTP-12832</p>
</item>
</list>
</section>
</section>
+<section><title>SSL 7.0</title>
+
+ <section><title>Fixed Bugs and Malfunctions</title>
+ <list>
+ <item>
+ <p>
+ Ignore signature_algorithm (TLS 1.2 extension) sent to
+ TLS 1.0 or TLS 1.1 server</p>
+ <p>
+ Own Id: OTP-12670</p>
+ </item>
+ <item>
+ <p>
+ Improve error handling in TLS distribution module to
+ avoid lingering sockets.</p>
+ <p>
+ Own Id: OTP-12799 Aux Id: Tom Briden </p>
+ </item>
+ <item>
+ <p>
+ Add option {client_renegotiation, boolean()} option to
+ the server-side of the SSL application.</p>
+ <p>
+ Own Id: OTP-12815</p>
+ </item>
+ </list>
+ </section>
+
+
+ <section><title>Improvements and New Features</title>
+ <list>
+ <item>
+ <p>
+ Add new API functions to handle CRL-verification</p>
+ <p>
+ Own Id: OTP-10362 Aux Id: kunagi-215 [126] </p>
+ </item>
+ <item>
+ <p>
+ Remove default support for SSL-3.0, due to Poodle
+ vunrability in protocol specification.</p>
+ <p>
+ Add padding check for TLS-1.0 to remove Poodle
+ vunrability from TLS 1.0, also add the option
+ padding_check. This option only affects TLS-1.0
+ connections and if set to false it disables the block
+ cipher padding check to be able to interoperate with
+ legacy software.</p>
+ <p>
+ Remove default support for RC4 cipher suites, as they are
+ consider too weak.</p>
+ <p>
+ *** POTENTIAL INCOMPATIBILITY ***</p>
+ <p>
+ Own Id: OTP-12390</p>
+ </item>
+ <item>
+ <p>
+ Add support for TLS ALPN (Application-Layer Protocol
+ Negotiation) extension.</p>
+ <p>
+ Own Id: OTP-12580</p>
+ </item>
+ <item>
+ <p>
+ Add SNI (Server Name Indication) support for the server
+ side.</p>
+ <p>
+ Own Id: OTP-12736</p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
+<section><title>SSL 6.0.1.1</title>
+ <section><title>Fixed Bugs and Malfunctions</title>
+ <list>
+ <item>
+ <p>
+ Gracefully ignore proprietary hash_sign algorithms</p>
+ <p>
+ Own Id: OTP-12829</p>
+ </item>
+ </list>
+ </section>
+</section>
+
+
<section><title>SSL 6.0.1</title>
<section><title>Fixed Bugs and Malfunctions</title>
diff --git a/lib/ssl/doc/src/pkix_certs.xml b/lib/ssl/doc/src/pkix_certs.xml
index cfbc6b08d7..a5793af5ca 100644
--- a/lib/ssl/doc/src/pkix_certs.xml
+++ b/lib/ssl/doc/src/pkix_certs.xml
@@ -8,16 +8,17 @@
<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.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
diff --git a/lib/ssl/doc/src/refman.xml b/lib/ssl/doc/src/refman.xml
index ae11198edb..317da00414 100644
--- a/lib/ssl/doc/src/refman.xml
+++ b/lib/ssl/doc/src/refman.xml
@@ -4,20 +4,21 @@
<application xmlns:xi="http://www.w3.org/2001/XInclude">
<header>
<copyright>
- <year>1999</year><year>2013</year>
+ <year>1999</year><year>2015</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/.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
- 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.
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
@@ -28,23 +29,10 @@
<rev>B</rev>
<file>refman.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_app.xml"/>
<xi:include href="ssl.xml"/>
+ <xi:include href="ssl_crl_cache.xml"/>
+ <xi:include href="ssl_crl_cache_api.xml"/>
<xi:include href="ssl_session_cache_api.xml"/>
</application>
diff --git a/lib/ssl/doc/src/release_notes.xml b/lib/ssl/doc/src/release_notes.xml
index 123e8e1451..4c9b18f900 100644
--- a/lib/ssl/doc/src/release_notes.xml
+++ b/lib/ssl/doc/src/release_notes.xml
@@ -8,16 +8,17 @@
<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.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
diff --git a/lib/ssl/doc/src/ssl.xml b/lib/ssl/doc/src/ssl.xml
index 0c042f8571..22ac98c24e 100644
--- a/lib/ssl/doc/src/ssl.xml
+++ b/lib/ssl/doc/src/ssl.xml
@@ -8,254 +8,295 @@
<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/.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
- 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.
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
<title>ssl</title>
+ <prepared></prepared>
+ <docno></docno>
+ <date></date>
+ <rev></rev>
<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 for the SSL.</p>
</description>
<section>
<title>SSL</title>
<list type="bulleted">
- <item>ssl requires the crypto and public_key applications.</item>
+ <item>For application dependencies see <seealso marker="ssl_app"> ssl(6)</seealso> </item>
<item>Supported SSL/TLS-versions are SSL-3.0, TLS-1.0,
- TLS-1.1 and TLS-1.2.</item>
- <item>For security reasons sslv2 is not supported.</item>
- <item>Ephemeral Diffie-Hellman cipher suites are supported
+ TLS-1.1, and TLS-1.2.</item>
+ <item>For security reasons SSL-2.0 is not supported.</item>
+ <item>For security reasons SSL-3.0 is no longer supported by default,
+ but can be configured.</item>
+ <item>Ephemeral Diffie-Hellman cipher suites are supported,
but not Diffie Hellman Certificates cipher suites.</item>
- <item>Elliptic Curve cipher suites are supported if crypto
- supports it and named curves are used.
+ <item>Elliptic Curve cipher suites are supported if the Crypto
+ application supports it and named curves are used.
</item>
<item>Export cipher suites are not supported as the
U.S. lifted its export restrictions in early 2000.</item>
<item>IDEA cipher suites are not supported as they have
- become deprecated by the latest TLS spec so there is not any
- real motivation to implement them.</item>
- <item>CRL and policy certificate extensions are not supported
- yet. However CRL verification is supported by public_key, only not integrated
- in ssl yet. </item>
- <item>Support for 'Server Name Indication' extension client side
- (RFC 6066 section 3).</item>
+ become deprecated by the latest TLS specification so it is not
+ motivated to implement them.</item>
+ <item>CRL validation is supported.</item>
+ <item>Policy certificate extensions are not supported.</item>
+ <item>'Server Name Indication' extension client side
+ (RFC 6066, Section 3) is supported.</item>
</list>
</section>
<section>
- <title>COMMON DATA TYPES</title>
- <p>The following data types are used in the functions below:
- </p>
+ <title>DATA TYPES</title>
+ <p>The following data types are used in the functions for SSL:</p>
- <p><c>boolean() = true | false</c></p>
+ <taglist>
- <p><c>option() = socketoption() | ssloption() | transportoption()</c></p>
+ <tag><c>boolean() =</c></tag>
+ <item><p><c>true | false</c></p></item>
- <p><c>socketoption() = proplists:property() - The default socket options are
- [{mode,list},{packet, 0},{header, 0},{active, true}].
- </c></p>
+ <tag><c>option() =</c></tag>
+ <item><p><c>socketoption() | ssloption() | transportoption()</c></p>
+ </item>
- <p>For valid options
- see <seealso marker="kernel:inet">inet(3)</seealso> and
- <seealso marker="kernel:gen_tcp">gen_tcp(3)</seealso>.
- </p>
-
- <p><marker id="type-ssloption"></marker><c>ssloption() = {verify, verify_type()} |
- {verify_fun, {fun(), term()}} |
- {fail_if_no_peer_cert, boolean()}
- {depth, integer()} |
- {cert, der_encoded()}| {certfile, path()} |
- {key, {'RSAPrivateKey'| 'DSAPrivateKey' | 'ECPrivateKey' |'PrivateKeyInfo', der_encoded()}} |
- {keyfile, path()} | {password, string()} |
- {cacerts, [der_encoded()]} | {cacertfile, path()} |
- |{dh, der_encoded()} | {dhfile, path()} | {ciphers, ciphers()} |
- {user_lookup_fun, {fun(), term()}}, {psk_identity, string()}, {srp_identity, {string(), string()}} |
- {ssl_imp, ssl_imp()} | {reuse_sessions, boolean()} | {reuse_session, fun()}
- {next_protocols_advertised, [binary()]} |
- {client_preferred_next_protocols, {client | server, [binary()]} | {client | server, [binary()], binary()}} |
- {log_alert, boolean()} | {server_name_indication, hostname() | disable}
- </c></p>
-
- <p><c>transportoption() = {cb_info, {CallbackModule::atom(), DataTag::atom(), ClosedTag::atom(), ErrTag:atom()}}
- - defaults to {gen_tcp, tcp, tcp_closed, tcp_error}. Can be used to customize
- the transport layer. The callback module must implement a reliable transport
- protocol and behave as gen_tcp and in addition have functions corresponding to
- inet:setopts/2, inet:getopts/2, inet:peername/1, inet:sockname/1 and inet:port/1.
- The callback gen_tcp is treated specially and will call inet directly.
- </c></p>
-
- <p><c>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CallbackModule =
- atom()</c>
- </p> <p><c>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DataTag =
- atom() - tag used in socket data message.</c></p>
- <p><c>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 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>
+ <tag><c>socketoption() =</c></tag>
+ <item><p><c>proplists:property()</c></p>
+ <p>The default socket options are
+ <c>[{mode,list},{packet, 0},{header, 0},{active, true}]</c>.</p>
+ <p>For valid options, see the
+ <seealso marker="kernel:inet">inet(3)</seealso> and
+ <seealso marker="kernel:gen_tcp">gen_tcp(3)</seealso> manual pages
+ in Kernel.</p></item>
- <p><c>der_encoded() = binary() -Asn1 DER encoded entity as an erlang binary.</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>
+ <tag><marker id="type-ssloption"></marker><c>ssloption() =</c></tag>
+ <item>
+ <p><c>{verify, verify_type()}</c></p>
+ <p><c>| {verify_fun, {fun(), term()}}</c></p>
+ <p><c>| {fail_if_no_peer_cert, boolean()}</c></p>
+ <p><c>| {depth, integer()}</c></p>
+ <p><c>| {cert, public_key:der_encoded()}</c></p>
+ <p><c>| {certfile, path()}</c></p>
+ <p><c>| {key, {'RSAPrivateKey'| 'DSAPrivateKey' | 'ECPrivateKey'
+ | 'PrivateKeyInfo', public_key:der_encoded()}}</c></p>
+ <p><c>| {keyfile, path()}</c></p>
+ <p><c>| {password, string()}</c></p>
+ <p><c>| {cacerts, [public_key:der_encoded()]}</c></p>
+ <p><c>| {cacertfile, path()}</c></p>
+ <p><c>| {dh, public_key:der_encoded()}</c></p>
+ <p><c>| {dhfile, path()}</c></p>
+ <p><c>| {ciphers, ciphers()}</c></p>
+ <p><c>| {user_lookup_fun, {fun(), term()}}, {psk_identity, string()},
+ {srp_identity, {string(), string()}}</c></p>
+ <p><c>| {reuse_sessions, boolean()}</c></p>
+ <p><c>| {reuse_session, fun()} {next_protocols_advertised, [binary()]}</c></p>
+ <p><c>| {client_preferred_next_protocols, {client | server,
+ [binary()]} | {client | server, [binary()], binary()}}</c></p>
+ <p><c>| {log_alert, boolean()}</c></p>
+ <p><c>| {server_name_indication, hostname() | disable}</c></p>
+ <p><c>| {sni_hosts, [{hostname(), ssloptions()}]}</c></p>
+ <p><c>| {sni_fun, SNIfun::fun()}</c></p>
+ </item>
+
+ <tag><c>transportoption() =</c></tag>
+ <item><p><c>{cb_info, {CallbackModule::atom(), DataTag::atom(),
+
+ ClosedTag::atom(), ErrTag:atom()}}</c></p>
+ <p>Defaults to <c>{gen_tcp, tcp, tcp_closed, tcp_error}</c>. Can be used
+ to customize the transport layer. The callback module must implement a
+ reliable transport protocol, behave as <c>gen_tcp</c>, and have functions
+ corresponding to <c>inet:setopts/2</c>, <c>inet:getopts/2</c>,
+ <c>inet:peername/1</c>, <c>inet:sockname/1</c>, and <c>inet:port/1</c>.
+ The callback <c>gen_tcp</c> is treated specially and calls <c>inet</c>
+ directly.</p>
+ <taglist>
+ <tag><c>CallbackModule =</c></tag>
+ <item><p><c>atom()</c></p></item>
+ <tag><c>DataTag =</c></tag>
+ <item><p><c>atom()</c></p>
+ <p>Used in socket data message.</p></item>
+ <tag><c>ClosedTag =</c></tag>
+ <item><p><c>atom()</c></p>
+ <p>Used in socket close message.</p></item>
+ </taglist>
+ </item>
- <p><c>sslsocket() - opaque to the user. </c></p>
-
- <p><c>protocol() = sslv3 | tlsv1 | 'tlsv1.1' | 'tlsv1.2' </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 | dh_anon
- | psk | dhe_psk | rsa_psk | srp_anon | srp_dss | srp_rsa
- | ecdh_anon | ecdh_ecdsa | ecdhe_ecdsa | ecdh_rsa | ecdhe_rsa
- </c></p>
+ <tag><c>verify_type() =</c></tag>
+ <item><p><c>verify_none | verify_peer</c></p></item>
+
+ <tag><c>path() =</c></tag>
+ <item><p><c>string()</c></p>
+ <p>Represents a file path.</p></item>
+
+ <tag><c>public_key:der_encoded() =</c></tag>
+ <item><p><c>binary()</c></p>
+ <p>ASN.1 DER-encoded entity as an Erlang binary.</p></item>
+
+ <tag><c>host() =</c></tag>
+ <item><p><c>hostname() | ipaddress()</c></p></item>
+
+ <tag><c>hostname() =</c></tag>
+ <item><p><c>string()</c></p></item>
- <p><c>cipher() = rc4_128 | des_cbc | '3des_ede_cbc'
- | aes_128_cbc | aes_256_cbc </c></p>
+ <tag><c>ip_address() =</c></tag>
+ <item><p><c>{N1,N2,N3,N4} % IPv4 | {K1,K2,K3,K4,K5,K6,K7,K8} % IPv6
+ </c></p></item>
- <p> <c>hash() = md5 | sha
- </c></p>
+ <tag><c>sslsocket() =</c></tag>
+ <item><p>opaque()</p></item>
- <p><c>prf_random() = client_random | server_random
- </c></p>
+ <tag><c>protocol() =</c></tag>
+ <item><p><c>sslv3 | tlsv1 | 'tlsv1.1' | 'tlsv1.2'</c></p></item>
- <p><c>srp_param_type() = srp_1024 | srp_1536 | srp_2048 | srp_3072
- | srp_4096 | srp_6144 | srp_8192</c></p>
+ <tag><c>ciphers() =</c></tag>
+ <item><p><c>= [ciphersuite()] | string()</c></p>
+ <p>According to old API.</p></item>
+ <tag><c>ciphersuite() =</c></tag>
+ <item><p><c>{key_exchange(), cipher(), hash()}</c></p></item>
+
+ <tag><c>key_exchange()=</c></tag>
+ <item><p><c>rsa | dhe_dss | dhe_rsa | dh_anon | psk | dhe_psk
+ | rsa_psk | srp_anon | srp_dss | srp_rsa | ecdh_anon | ecdh_ecdsa
+ | ecdhe_ecdsa | ecdh_rsa | ecdhe_rsa</c></p></item>
+
+ <tag><c>cipher() =</c></tag>
+ <item><p><c>rc4_128 | des_cbc | '3des_ede_cbc'
+ | aes_128_cbc | aes_256_cbc | aes_128_gcm | aes_256_gcm</c></p></item>
+
+ <tag><c>hash() =</c></tag>
+ <item><p><c>md5 | sha</c></p></item>
+
+ <tag><c>prf_random() =</c></tag>
+ <item><p><c>client_random | server_random</c></p></item>
+
+ <tag><c>srp_param_type() =</c></tag>
+ <item><p><c>srp_1024 | srp_1536 | srp_2048 | srp_3072
+ | srp_4096 | srp_6144 | srp_8192</c></p></item>
+
+ <tag><c>SNIfun::fun()</c></tag>
+ <item><p><c>= fun(ServerName :: string()) -> ssloptions()</c></p></item>
+
+ </taglist>
</section>
<section>
<title>SSL OPTION DESCRIPTIONS - COMMON for SERVER and CLIENT</title>
- <p>Options described here are options that are have the same
- meaning in the client and the server.
- </p>
+ <p>The following options have the same meaning in the client and
+ the server:</p>
<taglist>
- <tag>{cert, der_encoded()}</tag>
- <item> The DER encoded users certificate. If this option
- is supplied it will override the certfile option.</item>
+ <tag><c>{cert, public_key:der_encoded()}</c></tag>
+ <item><p>The DER-encoded users certificate. If this option
+ is supplied, it overrides option <c>certfile</c>.</p></item>
- <tag>{certfile, path()}</tag>
- <item>Path to a file containing the user's PEM encoded certificate.</item>
+ <tag><c>{certfile, path()}</c></tag>
+ <item><p>Path to a file containing the user certificate.</p></item>
- <tag>{key, {'RSAPrivateKey'| 'DSAPrivateKey' | 'ECPrivateKey' |'PrivateKeyInfo', der_encoded()}}</tag>
- <item> The DER encoded users private key. If this option
- is supplied it will override the keyfile option.</item>
+ <tag><c>{key, {'RSAPrivateKey'| 'DSAPrivateKey' | 'ECPrivateKey'
+ |'PrivateKeyInfo', public_key:der_encoded()}}</c></tag>
+ <item><p>The DER-encoded user's private key. If this option
+ is supplied, it overrides option <c>keyfile</c>.</p></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>{cacerts, [der_encoded()]}</tag>
- <item> The DER encoded trusted certificates. If this option
- is supplied it will override the cacertfile option.</item>
-
- <tag>{ciphers, ciphers()}</tag>
- <item>The cipher suites that should be supported. The function
+ <tag><c>{keyfile, path()}</c></tag>
+ <item><p>Path to the file containing the user's
+ private PEM-encoded key. As PEM-files can contain several
+ entries, this option defaults to the same file as given by
+ option <c>certfile</c>.</p></item>
+
+ <tag><c>{password, string()}</c></tag>
+ <item><p>String containing the user's password. Only used if the
+ private keyfile is password-protected.</p></item>
+
+ <tag><c>{ciphers, ciphers()}</c></tag>
+ <item><p>Supported cipher suites. The function
<c>cipher_suites/0</c> can be used to find all ciphers that are
- supported by default. <c>cipher_suites(all)</c> may be called
- to find all available cipher suites.
- Pre-Shared Key (<url href="http://www.ietf.org/rfc/rfc4279.txt">RFC 4279</url> and
+ supported by default. <c>cipher_suites(all)</c> can be called
+ to find all available cipher suites. Pre-Shared Key
+ (<url href="http://www.ietf.org/rfc/rfc4279.txt">RFC 4279</url> and
<url href="http://www.ietf.org/rfc/rfc5487.txt">RFC 5487</url>),
- Secure Remote Password (<url href="http://www.ietf.org/rfc/rfc5054.txt">RFC 5054</url>)
+ Secure Remote Password
+ (<url href="http://www.ietf.org/rfc/rfc5054.txt">RFC 5054</url>), RC4 cipher suites,
and anonymous cipher suites only work if explicitly enabled by
- this option and they are supported/enabled by the peer also.
- Note that anonymous cipher suites are supported for testing purposes
- only and should not be used when security matters.
+ this option; they are supported/enabled by the peer also.
+ Anonymous cipher suites are supported for testing purposes
+ only and are not be used when security matters.</p></item>
+
+ <tag><c>{secure_renegotiate, boolean()}</c></tag>
+ <item><p>Specifies if to reject renegotiation attempt that does
+ not live up to
+ <url href="http://www.ietf.org/rfc/rfc5746.txt">RFC 5746</url>.
+ By default <c>secure_renegotiate</c> is set to <c>false</c>,
+ that is, secure renegotiation is used if possible,
+ but it fallback to unsecure renegotiation if the peer
+ does not support
+ <url href="http://www.ietf.org/rfc/rfc5746.txt">RFC 5746</url>.</p>
</item>
- <tag>{ssl_imp, new | old}</tag>
- <item>No longer has any meaning as the old implementation has
- been removed, it will be ignored.
- </item>
-
- <tag>{secure_renegotiate, boolean()}</tag>
- <item>Specifies if to reject renegotiation attempt that does
- not live up to <url href="http://www.ietf.org/rfc/rfc5746.txt">RFC 5746</url>. By default secure_renegotiate is
- set to false i.e. secure renegotiation will be used if possible
- but it will fallback to unsecure renegotiation if the peer
- does not support <url href="http://www.ietf.org/rfc/rfc5746.txt">RFC 5746</url>.
- </item>
-
- <tag>{depth, integer()}</tag>
- <item>
- The depth is the maximum number of non-self-issued
- intermediate certificates that may follow the peer certificate
- in a valid certification path. So if depth is 0 the PEER must
- be signed by the trusted ROOT-CA directly, if 1 the path can
- be PEER, CA, ROOT-CA, if it is 2 PEER, CA, CA, ROOT-CA and so
- on. The default value is 1.
- </item>
+ <tag><c>{depth, integer()}</c></tag>
+ <item><p>Maximum number of non-self-issued
+ intermediate certificates that can follow the peer certificate
+ in a valid certification path. So, if depth is 0 the PEER must
+ be signed by the trusted ROOT-CA directly; if 1 the path can
+ be PEER, CA, ROOT-CA; if 2 the path can be PEER, CA, CA,
+ ROOT-CA, and so on. The default value is 1.</p></item>
- <tag>{verify_fun, {Verifyfun :: fun(), InitialUserState :: term()}}</tag>
- <item>
- <p>The verification fun should be defined as:</p>
+ <tag><c>{verify_fun, {Verifyfun :: fun(), InitialUserState ::
+ term()}}</c></tag>
+ <item><p>The verification fun is to be defined as follows:</p>
<code>
-fun(OtpCert :: #'OTPCertificate'{}, Event :: {bad_cert, Reason :: atom() | {revoked, atom()}} |
+fun(OtpCert :: #'OTPCertificate'{}, Event :: {bad_cert, Reason :: atom() | {revoked,
+atom()}} |
{extension, #'Extension'{}}, InitialUserState :: term()) ->
{valid, UserState :: term()} | {valid_peer, UserState :: term()} |
{fail, Reason :: term()} | {unknown, UserState :: term()}.
</code>
- <p>The verify fun will be called during the X509-path
- validation when an error or an extension unknown to the ssl
- application is encountered. Additionally it will be called
+ <p>The verification fun is called during the X509-path
+ validation when an error or an extension unknown to the SSL
+ application is encountered. It is also called
when a certificate is considered valid by the path validation
to allow access to each certificate in the path to the user
- application. Note that it will differentiate between the
- peer certificate and CA certificates by using valid_peer or
- valid as the second argument to the verify fun. See <seealso
- marker="public_key:cert_records">the public_key User's
- Guide</seealso> for definition of #'OTPCertificate'{} and
- #'Extension'{}.</p>
-
- <p>If the verify callback fun returns {fail, Reason}, the
- verification process is immediately stopped and an alert is
- sent to the peer and the TLS/SSL handshake is terminated. If
- the verify callback fun returns {valid, UserState}, the
- verification process is continued. If the verify callback fun
- always returns {valid, UserState}, the TLS/SSL handshake will
- not be terminated with respect to verification failures and
- the connection will be established. If called with an
- extension unknown to the user application, the return value
- {unknown, UserState} should be used.</p>
-
- <p>The default verify_fun option in verify_peer mode:</p>
+ application. It differentiates between the peer
+ certificate and the CA certificates by using <c>valid_peer</c> or
+ <c>valid</c> as second argument to the verification fun. See the
+ <seealso marker="public_key:public_key_records">public_key User's
+ Guide</seealso> for definition of <c>#'OTPCertificate'{}</c> and
+ <c>#'Extension'{}</c>.</p>
+
+ <list type="bulleted">
+ <item><p>If the verify callback fun returns <c>{fail, Reason}</c>,
+ the verification process is immediately stopped, an alert is
+ sent to the peer, and the TLS/SSL handshake terminates.</p></item>
+ <item><p>If the verify callback fun returns <c>{valid, UserState}</c>,
+ the verification process continues.</p></item>
+ <item><p>If the verify callback fun always returns
+ <c>{valid, UserState}</c>, the TLS/SSL handshake does not
+ terminate regarding verification failures and the connection is
+ established.</p></item>
+ <item><p>If called with an extension unknown to the user application,
+ return value <c>{unknown, UserState}</c> is to be used.</p></item>
+ </list>
+
+ <p>Default option <c>verify_fun</c> in <c>verify_peer mode</c>:</p>
<code>
{fun(_,{bad_cert, _} = Reason, _) ->
@@ -269,7 +310,7 @@ fun(OtpCert :: #'OTPCertificate'{}, Event :: {bad_cert, Reason :: atom() | {revo
end, []}
</code>
- <p>The default verify_fun option in verify_none mode:</p>
+ <p>Default option <c>verify_fun</c> in mode <c>verify_none</c>:</p>
<code>
{fun(_,{bad_cert, _}, UserState) ->
@@ -283,49 +324,88 @@ fun(OtpCert :: #'OTPCertificate'{}, Event :: {bad_cert, Reason :: atom() | {revo
end, []}
</code>
- <p>Possible path validation errors are given on the form {bad_cert, Reason} where Reason is:</p>
+ <p>The possible path validation errors are given on form
+ <c>{bad_cert, Reason}</c> where <c>Reason</c> is:</p>
<taglist>
- <tag>unknown_ca</tag>
- <item>No trusted CA was found in the trusted store. The trusted CA is
- normally a so called ROOT CA that is a self-signed cert. Trust may
- be claimed for an intermediat CA (trusted anchor does not have to be self signed
- according to X-509) by using the option <c>partial_chain</c></item>
-
- <tag>selfsigned_peer</tag>
- <item>The chain consisted only of one self-signed certificate.</item>
-
- <tag>PKIX X-509-path validation error</tag>
- <item> Possible such reasons see <seealso
- marker="public_key:public_key#pkix_path_validation-3"> public_key:pkix_path_validation/3 </seealso></item>
+ <tag><c>unknown_ca</c></tag>
+ <item><p>No trusted CA was found in the trusted store. The trusted CA is
+ normally a so called ROOT CA, which is a self-signed certificate. Trust can
+ be claimed for an intermediat CA (trusted anchor does not have to be
+ self-signed according to X-509) by using option <c>partial_chain</c>.</p>
+ </item>
+
+ <tag><c>selfsigned_peer</c></tag>
+ <item><p>The chain consisted only of one self-signed certificate.</p></item>
+
+ <tag><c>PKIX X-509-path validation error</c></tag>
+ <item><p>For possible reasons, see <seealso
+marker="public_key:public_key#pkix_path_validation-3">public_key:pkix_path_validation/3</seealso>
+ </p></item>
</taglist>
-
</item>
- <tag>{partial_chain, fun(Chain::[DerCert]) -> {trusted_ca, DerCert} | unknown_ca </tag>
+ <tag><c>{crl_check, boolean() | peer | best_effort }</c></tag>
<item>
- Claim an intermediat CA in the chain as trusted. TLS will then perform the public_key:pkix_path_validation/3
- with the selected CA as trusted anchor and the rest of the chain.
- </item>
+ Perform CRL (Certificate Revocation List) verification
+ <seealso marker="public_key:public_key#pkix_crls_validate-3">
+ (public_key:pkix_crls_validate/3)</seealso> on all the certificates during the path validation
+ <seealso
+ marker="public_key:public_key#pkix_path_validation-3">(public_key:pkix_path_validation/3)
+ </seealso>
+ of the certificate chain. Defaults to false.
+
+ <p><c>peer</c> - check is only performed on
+ the peer certificate.</p>
- <tag>{versions, [protocol()]}</tag>
- <item>TLS protocol versions that will be supported by started clients and servers.
- This option overrides the application environment option <c>protocol_version</c>. If the
- environment option is not set it defaults to all versions supported by the SSL application. See also
- <seealso marker="ssl:ssl_app">ssl(6)</seealso>
- </item>
+ <p><c>best_effort</c> - if certificate revocation status can not be determined
+ it will be accepted as valid.</p>
- <tag>{hibernate_after, integer()|undefined}</tag>
- <item>When an integer-value is specified, the <c>ssl_connection</c>
- will go into hibernation after the specified number of milliseconds
- of inactivity, thus reducing its memory footprint. When
- <c>undefined</c> is specified (this is the default), the process
- will never go into hibernation.
+ <p>The CA certificates specified for the connection will be used to
+ construct the certificate chain validating the CRLs.</p>
+
+ <p>The CRLs will be fetched from a local or external cache see
+ <seealso marker="ssl:ssl_crl_cache_api">ssl_crl_cache_api(3)</seealso>.</p>
</item>
- <tag>{user_lookup_fun, {Lookupfun :: fun(), UserState :: term()}}</tag>
+ <tag><c>{crl_cache, {Module :: atom(), {DbHandle :: internal | term(), Args :: list()}}}</c></tag>
<item>
- <p>The lookup fun should be defined as:</p>
+ <p>Module defaults to ssl_crl_cache with <c> DbHandle </c> internal and an
+ empty argument list. The following arguments may be specified for the internal cache.</p>
+ <taglist>
+ <tag><c>{http, timeout()}</c></tag>
+ <item><p>
+ Enables fetching of CRLs specified as http URIs in<seealso
+ marker="public_key:public_key_records"> X509 cerificate extensions.</seealso>
+ Requires the OTP inets application.</p>
+ </item>
+ </taglist>
+ </item>
+
+ <tag><c>{partial_chain, fun(Chain::[DerCert]) -> {trusted_ca, DerCert} |
+ unknown_ca }</c></tag>
+ <item><p>Claim an intermediate CA in the chain as trusted. TLS then
+ performs <seealso
+ marker="public_key:public_key#pkix_path_validation-3">public_key:pkix_path_validation/3</seealso>
+ with the selected CA as trusted anchor and the rest of the chain.</p></item>
+
+ <tag><c>{versions, [protocol()]}</c></tag>
+ <item><p>TLS protocol versions supported by started clients and servers.
+ This option overrides the application environment option
+ <c>protocol_version</c>. If the environment option is not set, it defaults
+ to all versions, except SSL-3.0, supported by the SSL application.
+ See also <seealso marker="ssl:ssl_app">ssl(6).</seealso></p></item>
+
+ <tag><c>{hibernate_after, integer()|undefined}</c></tag>
+ <item><p>When an integer-value is specified, <c>ssl_connection</c>
+ goes into hibernation after the specified number of milliseconds
+ of inactivity, thus reducing its memory footprint. When
+ <c>undefined</c> is specified (this is the default), the process
+ never goes into hibernation.</p></item>
+
+ <tag><c>{user_lookup_fun, {Lookupfun :: fun(), UserState :: term()}}</c></tag>
+ <item><p>The lookup fun is to defined as follows:</p>
+
<code>
fun(psk, PSKIdentity ::string(), UserState :: term()) ->
{ok, SharedSecret :: binary()} | error;
@@ -333,104 +413,121 @@ fun(srp, Username :: string(), UserState :: term()) ->
{ok, {SRPParams :: srp_param_type(), Salt :: binary(), DerivedKey :: binary()}} | error.
</code>
- <p>For Pre-Shared Key (PSK) cipher suites, the lookup fun will
- be called by the client and server to determine the shared
- secret. When called by the client, PSKIdentity will be set to the
- hint presented by the server or undefined. When called by the
- server, PSKIdentity is the identity presented by the client.
- </p>
-
- <p>For Secure Remote Password (SRP), the fun will only be used by the server to obtain
- parameters that it will use to generate its session keys. <c>DerivedKey</c> should be
- derived according to <url href="http://tools.ietf.org/html/rfc2945#section-3"> RFC 2945</url> and
- <url href="http://tools.ietf.org/html/rfc5054#section-2.4"> RFC 5054</url>:
- <c>crypto:sha([Salt, crypto:sha([Username, &lt;&lt;$:&gt;&gt;, Password])]) </c>
+ <p>For Pre-Shared Key (PSK) cipher suites, the lookup fun is
+ called by the client and server to determine the shared
+ secret. When called by the client, <c>PSKIdentity</c> is set to the
+ hint presented by the server or to undefined. When called by the
+ server, <c>PSKIdentity</c> is the identity presented by the client.</p>
+
+ <p>For Secure Remote Password (SRP), the fun is only used by the server to
+ obtain parameters that it uses to generate its session keys.
+ <c>DerivedKey</c> is to be derived according to
+ <url href="http://tools.ietf.org/html/rfc2945#section-3"> RFC 2945</url> and
+ <url href="http://tools.ietf.org/html/rfc5054#section-2.4"> RFC 5054</url>:
+ <c>crypto:sha([Salt, crypto:sha([Username, &lt;&lt;$:&gt;&gt;, Password])])</c>
</p>
</item>
- <tag>{padding_check, boolean()}</tag>
- <item>
- <p> This option only affects TLS-1.0 connections.
- If set to false it disables the block cipher padding check
- to be able to interoperate with legacy software.
- </p>
-
- <warning><p> Using this option makes TLS vulnerable to
- the Poodle attack</p></warning>
-
- </item>
-
+ <tag><c>{padding_check, boolean()}</c></tag>
+ <item><p>Affects TLS-1.0 connections only.
+ If set to <c>false</c>, it disables the block cipher padding check
+ to be able to interoperate with legacy software.</p></item>
+
</taglist>
-
+
+ <warning><p>Using <c>{padding_check, boolean()}</c> makes TLS
+ vulnerable to the Poodle attack.</p></warning>
+
</section>
<section>
<title>SSL OPTION DESCRIPTIONS - CLIENT SIDE</title>
- <p>Options described here are client specific or has a slightly different
- meaning in the client than in the server.</p>
+ <p>The following options are client-specific or have a slightly different
+ meaning in the client than in the server:</p>
<taglist>
- <tag>{verify, verify_type()}</tag>
- <item> In verify_none mode the default behavior will be to
- allow all x509-path validation errors. See also the verify_fun
- option.
- </item>
- <tag>{reuse_sessions, boolean()}</tag>
- <item>Specifies if client should try to reuse sessions
- when possible.
+
+ <tag><c>{verify, verify_type()}</c></tag>
+ <item><p>In mode <c>verify_none</c> the default behavior is to allow
+ all x509-path validation errors. See also option <c>verify_fun</c>.</p>
</item>
+
+ <tag><c>{reuse_sessions, boolean()}</c></tag>
+ <item><p>Specifies if the client is to try to reuse sessions
+ when possible.</p></item>
+
+ <tag><c>{cacerts, [public_key:der_encoded()]}</c></tag>
+ <item><p>The DER-encoded trusted certificates. If this option
+ is supplied it overrides option <c>cacertfile</c>.</p></item>
- <tag>{cacertfile, path()}</tag>
- <item>The path to a file containing PEM encoded CA certificates. The CA
+ <tag><c>{cacertfile, path()}</c></tag>
+ <item><p>Path to a file containing PEM-encoded CA certificates. The CA
certificates are used during server authentication and when building the
- client certificate chain.
- </item>
-
- <tag>{client_preferred_next_protocols, {Precedence :: server | client, ClientPrefs :: [binary()]}}</tag>
- <tag>{client_preferred_next_protocols, {Precedence :: server | client, ClientPrefs :: [binary()], Default :: binary()}}</tag>
+ client certificate chain.</p>
+ </item>
+
+ <tag><c>{alpn_advertised_protocols, [binary()]}</c></tag>
+ <item>
+ <p>The list of protocols supported by the client to be sent to the
+ server to be used for an Application-Layer Protocol Negotiation (ALPN).
+ If the server supports ALPN then it will choose a protocol from this
+ list; otherwise it will fail the connection with a "no_application_protocol"
+ alert. A server that does not support ALPN will ignore this value.</p>
+
+ <p>The list of protocols must not contain an empty binary.</p>
+
+ <p>The negotiated protocol can be retrieved using the <c>negotiated_protocol/1</c> function.</p>
+ </item>
+
+ <tag><c>{client_preferred_next_protocols, {Precedence :: server | client, ClientPrefs :: [binary()]}}</c></tag>
+ <tag><c>{client_preferred_next_protocols, {Precedence :: server | client, ClientPrefs :: [binary()], Default :: binary()}}</c></tag>
<item>
- <p>Indicates the client will try to perform Next Protocol
+ <p>Indicates that the client is to try to perform Next Protocol
Negotiation.</p>
- <p>If precedence is server the negotiated protocol will be the
- first protocol that appears on the server advertised list that is
+ <p>If precedence is server, the negotiated protocol is the
+ first protocol to be shown on the server advertised list, which is
also on the client preference list.</p>
- <p>If precedence is client the negotiated protocol will be the
- first protocol that appears on the client preference list that is
+ <p>If precedence is client, the negotiated protocol is the
+ first protocol to be shown on the client preference list, which is
also on the server advertised list.</p>
<p>If the client does not support any of the server advertised
- protocols or the server does not advertise any protocols the
- client will fallback to the first protocol in its list or if a
- default is supplied it will fallback to that instead. If the
- server does not support Next Protocol Negotiation the
- connection will be aborted if no default protocol is supplied.</p>
+ protocols or the server does not advertise any protocols, the
+ client falls back to the first protocol in its list or to the
+ default protocol (if a default is supplied). If the
+ server does not support Next Protocol Negotiation, the
+ connection terminates if no default protocol is supplied.</p>
</item>
- <tag>{psk_identity, string()}</tag>
- <item>Specifies the identity the client presents to the server. The matching secret is
- found by calling the user_look_fun.
- </item>
- <tag>{srp_identity, {Username :: string(), Password :: string()}</tag>
- <item>Specifies the Username and Password to use to authenticate to the server.
+ <tag><c>{psk_identity, string()}</c></tag>
+ <item><p>Specifies the identity the client presents to the server.
+ The matching secret is found by calling <c>user_lookup_fun</c>.</p>
</item>
- <tag>{server_name_indication, hostname()}</tag>
- <tag>{server_name_indication, disable}</tag>
+
+ <tag><c>{srp_identity, {Username :: string(), Password :: string()}
+ </c></tag>
+ <item><p>Specifies the username and password to use to authenticate
+ to the server.</p></item>
+
+ <tag><c>{server_name_indication, hostname()}</c></tag>
+ <item><p>Can be specified when upgrading a TCP socket to a TLS
+ socket to use the TLS Server Name Indication extension.</p></item>
+
+ <tag><c>{server_name_indication, disable}</c></tag>
<item>
- <p>This option can be specified when upgrading a TCP socket to a TLS
- socket to use the TLS Server Name Indication extension.</p>
- <p>When starting a TLS connection without upgrade the Server Name
- Indication extension will be sent if possible, this option may also be
+ <p>When starting a TLS connection without upgrade, the Server Name
+ Indication extension is sent if possible. This option can be
used to disable that behavior.</p>
</item>
- <tag>{fallback, boolean()}</tag>
+ <tag><c>{fallback, boolean()}</c></tag>
<item>
<p> Send special cipher suite TLS_FALLBACK_SCSV to avoid undesired TLS version downgrade.
Defaults to false</p>
<warning><p>Note this option is not needed in normal TLS usage and should not be used
- to implement new clients. But legacy clients that that retries connections in the following manner</p>
+ to implement new clients. But legacy clients that retries connections in the following manner</p>
<p><c> ssl:connect(Host, Port, [...{versions, ['tlsv2', 'tlsv1.1', 'tlsv1', 'sslv3']}])</c></p>
<p><c> ssl:connect(Host, Port, [...{versions, [tlsv1.1', 'tlsv1', 'sslv3']}, {fallback, true}])</c></p>
@@ -448,78 +545,126 @@ fun(srp, Username :: string(), UserState :: term()) ->
<section>
<title>SSL OPTION DESCRIPTIONS - SERVER SIDE</title>
- <p>Options described here are server specific or has a slightly different
- meaning in the server than in the client.</p>
+ <p>The following options are server-specific or have a slightly different
+ meaning in the server than in the client:</p>
<taglist>
+
+ <tag><c>{cacerts, [public_key:der_encoded()]}</c></tag>
+ <item><p>The DER-encoded trusted certificates. If this option
+ is supplied it overrides option <c>cacertfile</c>.</p></item>
- <tag>{cacertfile, path()}</tag>
- <item>The path to a file containing PEM encoded CA
+ <tag><c>{cacertfile, path()}</c></tag>
+ <item><p>Path to a file containing PEM-encoded CA
certificates. The CA certificates are used to build the server
- certificate chain, and for client authentication. Also the CAs
- are used in the list of acceptable client CAs passed to the
- client when a certificate is requested. May be omitted if there
- is no need to verify the client and if there are not any
- intermediate CAs for the server certificate.
- </item>
+ certificate chain and for client authentication. The CAs are
+ also used in the list of acceptable client CAs passed to the
+ client when a certificate is requested. Can be omitted if there
+ is no need to verify the client and if there are no
+ intermediate CAs for the server certificate.</p></item>
- <tag>{dh, der_encoded()}</tag>
- <item>The DER encoded Diffie Hellman parameters. If this option
- is supplied it will override the dhfile option.
- </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 default parameters will be used.
+ <tag><c>{dh, public_key:der_encoded()}</c></tag>
+ <item><p>The DER-encoded Diffie-Hellman parameters. If specified,
+ it overrides option <c>dhfile</c>.</p></item>
+
+ <tag><c>{dhfile, path()}</c></tag>
+ <item><p>Path to a file containing PEM-encoded Diffie Hellman parameters
+ to be used by the server if a cipher suite using Diffie Hellman key
+ exchange is negotiated. If not specified, default parameters are used.
+ </p></item>
+
+ <tag><c>{verify, verify_type()}</c></tag>
+ <item><p>A server only does x509-path validation in mode <c>verify_peer</c>,
+ as it then sends a certificate request to the client
+ (this message is not sent if the verify option is <c>verify_none</c>).
+ You can then also want to specify option <c>fail_if_no_peer_cert</c>.
+ </p></item>
+
+ <tag><c>{fail_if_no_peer_cert, boolean()}</c></tag>
+ <item><p>Used together with <c>{verify, verify_peer}</c> by an SSL server.
+ If set to <c>true</c>, the server fails if the client does not have
+ a certificate to send, that is, sends an empty certificate. If set to
+ <c>false</c>, it fails only if the client sends an invalid
+ certificate (an empty certificate is considered valid). Defaults to false.</p>
</item>
- <tag>{verify, verify_type()}</tag>
- <item>Servers only do the x509-path validation in verify_peer
- mode, as it then will send a certificate request to the client
- (this message is not sent if the verify option is verify_none)
- and you may then also want to specify the option
- fail_if_no_peer_cert.
- </item>
+ <tag><c>{reuse_sessions, boolean()}</c></tag>
+ <item><p>Specifies if the server is to agree to reuse sessions
+ when requested by the clients. See also option <c>reuse_session</c>.
+ </p></item>
+
+ <tag><c>{reuse_session, fun(SuggestedSessionId,
+ PeerCert, Compression, CipherSuite) -> boolean()}</c></tag>
+ <item><p>Enables the SSL server to have a local policy
+ for deciding if a session is to be reused or not.
+ Meaningful only if <c>reuse_sessions</c> is set to <c>true</c>.
+ <c>SuggestedSessionId</c> is a <c>binary()</c>, <c>PeerCert</c> is
+ a DER-encoded certificate, <c>Compression</c> is an enumeration integer,
+ and <c>CipherSuite</c> is of type <c>ciphersuite()</c>.</p></item>
+
+ <tag><c>{alpn_preferred_protocols, [binary()]}</c></tag>
+ <item>
+ <p>Indicates the server will try to perform Application-Layer
+ Protocol Negotiation (ALPN).</p>
- <tag>{fail_if_no_peer_cert, boolean()}</tag>
- <item>Used together with {verify, verify_peer} by an ssl server.
- If set to true, the server will fail if the client does not have
- a certificate to send, i.e. sends a empty certificate, if set to
- false it will only fail if the client sends an invalid
- certificate (an empty certificate is considered valid).
- </item>
+ <p>The list of protocols is in order of preference. The protocol
+ negotiated will be the first in the list that matches one of the
+ protocols advertised by the client. If no protocol matches, the
+ server will fail the connection with a "no_application_protocol" alert.</p>
- <tag>{reuse_sessions, boolean()}</tag>
- <item>Specifies if the server should agree to reuse sessions
- when the clients request to do so. See also the reuse_session
- option.
+ <p>The negotiated protocol can be retrieved using the <c>negotiated_protocol/1</c> function.</p>
</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 meaningful 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 is of type ciphersuite().
- </item>
-
- <tag>{next_protocols_advertised, Protocols :: [binary()]}</tag>
- <item>The list of protocols to send to the client if the client indicates
- it supports the Next Protocol extension. The client may select a protocol
+ <tag><c>{next_protocols_advertised, Protocols :: [binary()]}</c></tag>
+ <item><p>List of protocols to send to the client if the client indicates that
+ it supports the Next Protocol extension. The client can select a protocol
that is not on this list. The list of protocols must not contain an empty
- binary. If the server negotiates a Next Protocol it can be accessed
- using <c>negotiated_next_protocol/1</c> method.
+ binary. If the server negotiates a Next Protocol, it can be accessed
+ using the <c>negotiated_next_protocol/1</c> method.</p></item>
+
+ <tag><c>{psk_identity, string()}</c></tag>
+ <item><p>Specifies the server identity hint, which the server presents to
+ the client.</p></item>
+
+ <tag><c>{log_alert, boolean()}</c></tag>
+ <item><p>If set to <c>false</c>, error reports are not displayed.</p></item>
+
+ <tag><c>{honor_cipher_order, boolean()}</c></tag>
+ <item><p>If set to <c>true</c>, use the server preference for cipher
+ selection. If set to <c>false</c> (the default), use the client
+ preference.</p></item>
+
+ <tag><c>{sni_hosts, [{hostname(), ssloptions()}]}</c></tag>
+ <item><p>If the server receives a SNI (Server Name Indication) from the client
+ matching a host listed in the <c>sni_hosts</c> option, the speicific options for
+ that host will override previously specified options.
+
+ The option <c>sni_fun</c>, and <c>sni_hosts</c> are mutually exclusive.</p></item>
+
+ <tag><c>{sni_fun, SNIfun::fun()}</c></tag>
+ <item><p>If the server receives a SNI (Server Name Indication) from the client,
+ the given function will be called to retrive <c>ssloptions()</c> for indicated server.
+ These options will be merged into predefined <c>ssloptions()</c>.
+
+ The function should be defined as:
+ <c>fun(ServerName :: string()) -> ssloptions()</c>
+ and can be specified as a fun or as named <c>fun module:function/1</c>
+
+ The option <c>sni_fun</c>, and <c>sni_hosts</c> are mutually exclusive.</p></item>
+
+ <tag><c>{client_renegotiation, boolean()}</c></tag>
+ <item>In protocols that support client-initiated renegotiation, the cost
+ of resources of such an operation is higher for the server than the
+ client. This can act as a vector for denial of service attacks. The SSL
+ application already takes measures to counter-act such attempts,
+ but client-initiated renegotiation can be stricly disabled by setting
+ this option to <c>false</c>. The default value is <c>true</c>.
+ Note that disabling renegotiation can result in long-lived connections
+ becoming unusable due to limits on the number of messages the underlying
+ cipher suite can encipher.
</item>
- <tag>{psk_identity, string()}</tag>
- <item>Specifies the server identity hint the server presents to the client.
- </item>
- <tag>{log_alert, boolean()}</tag>
- <item>If false, error reports will not be displayed.</item>
- <tag>{honor_cipher_order, boolean()}</tag>
+ <tag><c>{honor_cipher_order, boolean()}</c></tag>
<item>If true, use the server's preference for cipher selection. If false
(the default), use the client's preference.
</item>
@@ -529,42 +674,36 @@ fun(srp, Username :: string(), UserState :: term()) ->
<section>
<title>General</title>
- <p>When an ssl socket is in active mode (the default), data from the
+ <p>When an 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>
+ messages:</p>
+
<list type="bulleted">
- <item>{ssl, Socket, Data}
- </item>
- <item>{ssl_closed, Socket}
- </item>
- <item>
- {ssl_error, Socket, Reason}
- </item>
+ <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>A <c>Timeout</c> argument specifies a time-out in milliseconds. The
+ default value for argument <c>Timeout</c> 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>
+ <fsummary>Returns a list of supported cipher suites.</fsummary>
<type>
<v>Type = erlang | openssl | all</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. cipher_suites(all) returns
+ <c>cipher_suites()</c> is equivalent to <c>cipher_suites(erlang).</c>
+ Type <c>openssl</c> is provided for backwards compatibility with the
+ old SSL, which used OpenSSL. <c>cipher_suites(all)</c> returns
all available cipher suites. The cipher suites not present
- in cipher_suites(erlang) but in included in cipher_suites(all)
- will not be used unless explicitly configured by the user.
- </p>
+ in <c>cipher_suites(erlang)</c> but included in
+ <c>cipher_suites(all)</c> are not used unless explicitly configured
+ by the user.</p>
</desc>
</func>
@@ -584,17 +723,17 @@ fun(srp, Username :: string(), UserState :: term()) ->
<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 an ssl socket. </fsummary>
+ <fsummary>Upgrades a <c>gen_tcp</c>, or
+ equivalent, connected socket to an SSL socket.</fsummary>
<type>
- <v>Socket = socket()</v>
- <v>SslOptions = [ssloption()]</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>Upgrades a gen_tcp, or equivalent,
- connected socket to an ssl socket i.e. performs the
+ <desc><p>Upgrades a <c>gen_tcp</c>, or equivalent,
+ connected socket to an SSL socket, that is, performs the
client-side ssl handshake.</p>
</desc>
</func>
@@ -603,7 +742,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
<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>
+ <fsummary>Opens an SSL connection to <c>Host</c>, <c>Port</c>.</fsummary>
<type>
<v>Host = host()</v>
<v>Port = integer()</v>
@@ -612,72 +751,124 @@ fun(srp, Username :: string(), UserState :: term()) ->
<v>SslSocket = sslsocket()</v>
<v>Reason = term()</v>
</type>
- <desc> <p>Opens an ssl connection to Host, Port.</p> </desc>
+ <desc><p>Opens an SSL connection to <c>Host</c>, <c>Port</c>.</p></desc>
</func>
<func>
<name>close(SslSocket) -> ok | {error, Reason}</name>
- <fsummary>Close an ssl connection</fsummary>
+ <fsummary>Closes an SSL connection.</fsummary>
<type>
<v>SslSocket = sslsocket()</v>
<v>Reason = term()</v>
</type>
- <desc><p>Close an ssl connection.</p>
+ <desc><p>Closes an SSL connection.</p>
+ </desc>
+ </func>
+
+ <func>
+ <name>close(SslSocket, How) -> ok | {ok, port()} | {error, Reason}</name>
+ <fsummary>Closes an SSL connection.</fsummary>
+ <type>
+ <v>SslSocket = sslsocket()</v>
+ <v>How = timeout() | {NewController::pid(), timeout()} </v>
+ <v>Reason = term()</v>
+ </type>
+ <desc><p>Closes or downgrades an SSL connection, in the later case the transport
+ connection will be handed over to the <c>NewController</c> process after reciving
+ the TLS close alert from the peer. The retuned transport socket will have
+ the following options set [{active, false}, {packet, 0}, {mode, binary}].</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>controlling_process(SslSocket, NewOwner) ->
ok | {error, Reason}</name>
-
<fsummary>Assigns a new controlling process to the
- ssl-socket.</fsummary>
-
+ 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 an ssl-socket, and receives
- all messages from the socket.</p>
+ <desc><p>Assigns a new controlling process to the SSL socket. A
+ controlling process is the owner of an 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.
+ <name>connection_information(SslSocket) ->
+ {ok, Info} | {error, Reason} </name>
+ <fsummary>Returns all the connection information.
</fsummary>
<type>
+ <v>Info = [InfoTuple]</v>
+ <v>InfoTuple = {protocol, Protocol} | {cipher_suite, CipherSuite} | {sni_hostname, SNIHostname}</v>
<v>CipherSuite = ciphersuite()</v>
<v>ProtocolVersion = protocol()</v>
+ <v>SNIHostname = string()</v>
+ <v>Reason = term()</v>
</type>
- <desc><p>Returns the negotiated protocol version and cipher suite.</p>
+ <desc><p>Return all the connection information containing negotiated protocol version, cipher suite, and the hostname of SNI extension.
+ Info will be a proplists containing all the connection information on success, otherwise <c>{error, Reason}</c> will be returned.</p>
</desc>
</func>
- <func>
+ <func>
+ <name>connection_information(SslSocket, Items) ->
+ {ok, Info} | {error, Reason} </name>
+ <fsummary>Returns the requested connection information.
+ </fsummary>
+ <type>
+ <v>Items = [Item]</v>
+ <v>Item = protocol | cipher_suite | sni_hostname</v>
+ <v>Info = [InfoTuple]</v>
+ <v>InfoTuple = {protocol, Protocol} | {cipher_suite, CipherSuite} | {sni_hostname, SNIHostname}</v>
+ <v>CipherSuite = ciphersuite()</v>
+ <v>ProtocolVersion = protocol()</v>
+ <v>SNIHostname = string()</v>
+ <v>Reason = term()</v>
+ </type>
+ <desc><p>Returns the connection information you requested. The connection information you can request contains protocol, cipher_suite, and sni_hostname.
+ <c>{ok, Info}</c> will be returned if it executes sucessfully. The Info is a proplists containing the information you requested.
+ Otherwise, <c>{error, Reason}</c> will be returned.</p>
+ </desc>
+ </func>
+
+ <func>
<name>format_error(Reason) -> string()</name>
- <fsummary>Return an error string.</fsummary>
+ <fsummary>Returns an error string.</fsummary>
<type>
<v>Reason = term()</v>
</type>
<desc>
- <p>Presents the error returned by an ssl function as a printable string.</p>
+ <p>Presents the error returned by an SSL function as a printable string.</p>
</desc>
</func>
<func>
<name>getopts(Socket, OptionNames) ->
{ok, [socketoption()]} | {error, Reason}</name>
- <fsummary>Get the value of the specified options.</fsummary>
+ <fsummary>Gets the values of the specified options.</fsummary>
<type>
<v>Socket = sslsocket()</v>
<v>OptionNames = [atom()]</v>
</type>
<desc>
- <p>Get the value of the specified socket options.
+ <p>Gets the values of the specified socket options.
</p>
</desc>
</func>
@@ -685,34 +876,49 @@ fun(srp, Username :: string(), UserState :: term()) ->
<func>
<name>listen(Port, Options) ->
{ok, ListenSocket} | {error, Reason}</name>
- <fsummary>Creates an ssl listen socket.</fsummary>
+ <fsummary>Creates an SSL listen socket.</fsummary>
<type>
<v>Port = integer()</v>
<v>Options = options()</v>
<v>ListenSocket = sslsocket()</v>
</type>
<desc>
- <p>Creates an ssl listen socket.</p>
+ <p>Creates an SSL listen socket.</p>
</desc>
</func>
<func>
+ <name>negotiated_protocol(Socket) -> {ok, Protocol} | {error, protocol_not_negotiated}</name>
+ <fsummary>Returns the protocol negotiated through ALPN or NPN extensions.</fsummary>
+ <type>
+ <v>Socket = sslsocket()</v>
+ <v>Protocol = binary()</v>
+ </type>
+ <desc>
+ <p>
+ Returns the protocol negotiated through ALPN or NPN extensions.
+ </p>
+ </desc>
+ </func>
+
+ <func>
<name>peercert(Socket) -> {ok, Cert} | {error, Reason}</name>
- <fsummary>Return the peer certificate.</fsummary>
+ <fsummary>Returns the peer certificate.</fsummary>
<type>
<v>Socket = sslsocket()</v>
<v>Cert = binary()</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>
+ <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>
+ <fsummary>Returns the peer address and port.</fsummary>
<type>
<v>Socket = sslsocket()</v>
<v>Address = ipaddress()</v>
@@ -722,12 +928,32 @@ fun(srp, Username :: string(), UserState :: term()) ->
<p>Returns the address and port number of the peer.</p>
</desc>
</func>
+
+ <func>
+ <name>prf(Socket, Secret, Label, Seed, WantedLength) -> {ok, binary()} | {error, reason()}</name>
+ <fsummary>Uses a session Pseudo-Random Function to generate key material.</fsummary>
+ <type>
+ <v>Socket = sslsocket()</v>
+ <v>Secret = binary() | master_secret</v>
+ <v>Label = binary()</v>
+ <v>Seed = [binary() | prf_random()]</v>
+ <v>WantedLength = non_neg_integer()</v>
+ </type>
+ <desc>
+ <p>Uses the Pseudo-Random Function (PRF) of a TLS session to generate
+ extra key material. It either takes user-generated values for
+ <c>Secret</c> and <c>Seed</c> or atoms directing it to use a specific
+ value from the session security parameters.</p>
+ <p>Can only be used with TLS connections; <c>{error, undefined}</c>
+ is returned for SSLv3 connections.</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>
+ <fsummary>Receives data on a socket.</fsummary>
<type>
<v>Socket = sslsocket()</v>
<v>Length = integer()</v>
@@ -735,63 +961,43 @@ fun(srp, Username :: string(), UserState :: term()) ->
<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
+ <p>Receives a packet from a socket in passive
+ mode. A closed socket is indicated by 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
+ <p>Argument <c>Length</c> is meaningful only when
+ the socket is in mode <c>raw</c> and denotes the number of
bytes to read. If <c>Length</c> = 0, all available bytes are
returned. If <c>Length</c> &gt; 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
+ <p>Optional argument <c>Timeout</c> specifies a time-out in
milliseconds. The default value is <c>infinity</c>.</p>
</desc>
</func>
<func>
- <name>prf(Socket, Secret, Label, Seed, WantedLength) -> {ok, binary()} | {error, reason()}</name>
- <fsummary>Use a sessions pseudo random function to generate key material.</fsummary>
- <type>
- <v>Socket = sslsocket()</v>
- <v>Secret = binary() | master_secret</v>
- <v>Label = binary()</v>
- <v>Seed = [binary() | prf_random()]</v>
- <v>WantedLength = non_neg_integer()</v>
- </type>
- <desc>
- <p>Use the pseudo random function (PRF) of a TLS session to generate
- additional key material. It either takes user generated values for
- <c>Secret</c> and <c>Seed</c> or atoms directing it use a specific
- value from the session security parameters.</p>
- <p>This function can only be used with TLS connections, <c>{error, undefined}</c>
- is returned for SSLv3 connections.</p>
- </desc>
- </func>
-
- <func>
<name>renegotiate(Socket) -> ok | {error, Reason}</name>
- <fsummary> Initiates a new handshake.</fsummary>
+ <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
+ 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>
+ <fsummary>Writes data to a socket.</fsummary>
<type>
<v>Socket = sslsocket()</v>
<v>Data = iodata()</v>
</type>
<desc>
- <p>Writes <c>Data</c> to <c>Socket</c>. </p>
+ <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>
@@ -799,31 +1005,31 @@ fun(srp, Username :: string(), UserState :: term()) ->
<func>
<name>setopts(Socket, Options) -> ok | {error, Reason}</name>
- <fsummary>Set socket options.</fsummary>
+ <fsummary>Sets 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>
+ <p>Sets options according to <c>Options</c> for socket
+ <c>Socket</c>.</p>
</desc>
</func>
<func>
<name>shutdown(Socket, How) -> ok | {error, Reason}</name>
- <fsummary>Immediately close a socket</fsummary>
+ <fsummary>Immediately closes 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>Immediately closes 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
+ the write side, option <c>{exit_on_close, false}</c>
is useful.</p>
</desc>
</func>
@@ -831,16 +1037,16 @@ fun(srp, Username :: string(), UserState :: term()) ->
<func>
<name>ssl_accept(Socket) -> </name>
<name>ssl_accept(Socket, Timeout) -> ok | {error, Reason}</name>
- <fsummary>Perform server-side SSL/TLS handshake</fsummary>
+ <fsummary>Performs server-side SSL/TLS handshake.</fsummary>
<type>
<v>Socket = sslsocket()</v>
<v>Timeout = integer()</v>
<v>Reason = term()</v>
</type>
<desc>
- <p> Performs the SSL/TLS server-side handshake <c>Socket</c> is a socket as returned
- by <seealso
- marker="#transport_accept-2">ssl:transport_accept/[1,2]</seealso>
+ <p>Performs the SSL/TLS server-side handshake.</p>
+ <p><c>Socket</c> is a socket as returned by
+ <seealso marker="#transport_accept-2">ssl:transport_accept/[1,2]</seealso>
</p>
</desc>
</func>
@@ -848,7 +1054,7 @@ fun(srp, Username :: string(), UserState :: term()) ->
<func>
<name>ssl_accept(Socket, SslOptions) -> </name>
<name>ssl_accept(Socket, SslOptions, Timeout) -> {ok, Socket} | ok | {error, Reason}</name>
- <fsummary>Perform server-side SSL/TLS handshake</fsummary>
+ <fsummary>Performs server-side SSL/TLS handshake.</fsummary>
<type>
<v>Socket = socket() | sslsocket() </v>
<v>SslOptions = ssloptions()</v>
@@ -856,17 +1062,19 @@ fun(srp, Username :: string(), UserState :: term()) ->
<v>Reason = term()</v>
</type>
<desc>
- <p> If <c>Socket</c> is a socket() - upgrades a gen_tcp, or equivalent, socket to an ssl socket
- i.e. performs the SSL/TLS server-side handshake and returns the ssl socket.
- </p>
+ <p>If <c>Socket</c> is a <c>socket()</c>: upgrades a <c>gen_tcp</c>,
+ or equivalent, socket to an SSL socket, that is, performs
+ the SSL/TLS server-side handshake and returns the SSL socket.</p>
- <warning><p>Note that the listen socket should be in {active, false} mode
+ <warning><p>The listen socket is to be in mode <c>{active, false}</c>
before telling the client that the server is ready to upgrade
- by calling this function, otherwise the upgrade may
- or may not succeed depending on timing.</p></warning>
+ by calling this function, else the upgrade succeeds or does not
+ succeed depending on timing.</p></warning>
- <p> If <c>Socket</c> is an sslsocket() - provides additional SSL/TLS options to those specified in <seealso
- marker="#listen-2">ssl:listen/2 </seealso> and then performs the SSL/TLS handshake.
+ <p>If <c>Socket</c> is an <c>sslsocket()</c>: provides extra SSL/TLS
+ options to those specified in
+ <seealso marker="#listen-2">ssl:listen/2 </seealso> and then performs
+ the SSL/TLS handshake.
</p>
</desc>
</func>
@@ -874,14 +1082,14 @@ fun(srp, Username :: string(), UserState :: term()) ->
<func>
<name>sockname(Socket) -> {ok, {Address, Port}} |
{error, Reason}</name>
- <fsummary>Return the local address and port.</fsummary>
+ <fsummary>Returns 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
+ <p>Returns the local address and port number of socket
<c>Socket</c>.</p>
</desc>
</func>
@@ -889,22 +1097,21 @@ fun(srp, Username :: string(), UserState :: term()) ->
<func>
<name>start() -> </name>
<name>start(Type) -> ok | {error, Reason}</name>
- <fsummary>Starts the Ssl application. </fsummary>
+ <fsummary>Starts the SSL application.</fsummary>
<type>
- <v>Type = permanent | transient | temporary</v>
+ <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>
+ <p>Starts the SSL application. Default type
+ is <c>temporary</c>.</p>
</desc>
</func>
+
<func>
<name>stop() -> ok </name>
- <fsummary>Stops the Ssl application.</fsummary>
+ <fsummary>Stops the SSL application.</fsummary>
<desc>
- <p>Stops the Ssl application.
- <seealso marker="kernel:application">application(3)</seealso></p>
+ <p>Stops the SSL application.</p>
</desc>
</func>
@@ -912,8 +1119,8 @@ fun(srp, Username :: string(), UserState :: term()) ->
<name>transport_accept(ListenSocket) -></name>
<name>transport_accept(ListenSocket, Timeout) ->
{ok, NewSocket} | {error, Reason}</name>
- <fsummary>Accept an incoming connection and
- prepare for <c>ssl_accept</c></fsummary>
+ <fsummary>Accepts an incoming connection and
+ prepares for <c>ssl_accept</c>.</fsummary>
<type>
<v>ListenSocket = NewSocket = sslsocket()</v>
<v>Timeout = integer()</v>
@@ -922,66 +1129,66 @@ fun(srp, Username :: string(), UserState :: term()) ->
<desc>
<p>Accepts an incoming connection request on a listen socket.
<c>ListenSocket</c> must be a socket returned from
- <seealso
- marker="#listen-2"> ssl:listen/2</seealso>.
- The socket returned should be passed to
+ <seealso marker="#listen-2"> ssl:listen/2</seealso>.
+ The socket returned is to be passed to
<seealso marker="#ssl_accept-2"> ssl:ssl_accept[2,3]</seealso>
- to complete handshaking i.e
+ to complete handshaking, that is,
establishing the SSL/TLS connection.</p>
<warning>
<p>The socket returned can only be used with
- <seealso marker="#ssl_accept-2"> ssl:ssl_accept[2,3]</seealso>
- no traffic can be sent or received before that call.</p>
+ <seealso marker="#ssl_accept-2"> ssl:ssl_accept[2,3]</seealso>.
+ 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 <seealso
- marker="#listen-2"> ssl:listen/2</seealso>.</p>
+ <c>ListenSocket</c> in
+ <seealso marker="#listen-2"> ssl:listen/2</seealso>.</p>
<p>The default
value for <c>Timeout</c> is <c>infinity</c>. If
- <c>Timeout</c> is specified, and no connection is accepted
+ <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>
+ <name>versions() -> [versions_info()]</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>
- <func>
- <name>negotiated_next_protocol(Socket) -> {ok, Protocol} | {error, next_protocol_not_negotiated}</name>
- <fsummary>Returns the Next Protocol negotiated.</fsummary>
+ SSL application.</fsummary>
<type>
- <v>Socket = sslsocket()</v>
- <v>Protocol = binary()</v>
+ <v>versions_info() = {app_vsn, string()} | {supported | available, [protocol()] </v>
</type>
<desc>
- <p>
- Returns the Next Protocol negotiated.
- </p>
+ <p>Returns version information relevant for the SSL
+ application.</p>
+ <taglist>
+ <tag><c>app_vsn</c></tag>
+ <item>The application version of the SSL application.</item>
+
+ <tag><c>supported</c></tag>
+ <item>TLS/SSL versions supported by default.
+ Overridden by a version option on
+ <seealso marker="#connect-2"> connect/[2,3,4]</seealso>,
+ <seealso marker="#listen-2"> listen/2</seealso>, and <seealso
+ marker="#ssl_accept-2">ssl_accept/[1,2,3]</seealso>.
+ For the negotiated TLS/SSL version, see <seealso
+ marker="#connection_info-1">ssl:connection_info/1
+ </seealso>.</item>
+
+ <tag><c>available</c></tag>
+ <item>All TLS/SSL versions supported by the SSL application.
+ TLS 1.2 requires sufficient support from the Crypto
+ application.</item>
+ </taglist>
</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><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/ssl_app.xml b/lib/ssl/doc/src/ssl_app.xml
index f1377cabda..51ce0cedf1 100644
--- a/lib/ssl/doc/src/ssl_app.xml
+++ b/lib/ssl/doc/src/ssl_app.xml
@@ -8,80 +8,75 @@
<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/.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
- 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.
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
<title>ssl</title>
+ <prepared></prepared>
+ <docno></docno>
+ <date></date>
+ <rev></rev>
<file>ssl_app.sgml</file>
</header>
<app>ssl</app>
- <appsummary>The SSL application provides secure communication over
+ <appsummary>The ssl application provides secure communication over
sockets.</appsummary>
+ <description></description>
<section>
<title>DEPENDENCIES</title>
- <p>The ssl application uses the Erlang applications public_key and
- crypto to handle public keys and encryption, hence these
- applications needs to be loaded for the ssl application to work. In
- an embedded environment that means they need to be started with
- application:start/[1,2] before the ssl application is started.
- </p>
+ <p>The SSL application uses the <c>public_key</c> and
+ Crypto application to handle public keys and encryption, hence
+ these applications must be loaded for the SSL application to work.
+ In an embedded environment this means they must be started with
+ <c>application:start/[1,2]</c> before the SSL application is
+ started.</p>
</section>
<section>
- <title>ENVIRONMENT</title>
- <p>The following application environment configuration parameters
- are defined for the SSL application. See <seealso
- marker="kernel:application">application(3)</seealso>for more
- information about configuration parameters.
- </p>
- <p>Note that the environment parameters can be set on the command line,
- for instance,</p>
- <p><c>erl ... -ssl protocol_version '[sslv3, tlsv1]' ...</c>.
- </p>
+ <title>CONFIGURATION</title>
+ <p>The application environment configuration parameters in this section
+ are defined for the SSL application. For more information
+ about configuration parameters, see the
+ <seealso marker="kernel:application">application(3)</seealso>
+ manual page in Kernel.</p>
+
+ <p>The environment parameters can be set on the command line,
+ for example:</p>
+
+ <p><c>erl -ssl protocol_version "['tlsv1.2', 'tlsv1.1']"</c></p>
+
<taglist>
- <tag><c><![CDATA[protocol_version = [sslv3|tlsv1] <optional>]]></c>.</tag>
- <item>
- <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[protocol_version = <seealso marker="kernel:error_logger">ssl:protocol()</seealso> <optional>]]></c>.</tag>
+ <item><p>Protocol supported by started clients and
+ servers. If this option is not set, it defaults to all
+ protocols currently supported by the SSL application.
+ This option can be overridden by the version option
+ to <c>ssl:connect/[2,3]</c> and <c>ssl:listen/2</c>.</p></item>
<tag><c><![CDATA[session_lifetime = integer() <optional>]]></c></tag>
- <item>
- <p>The lifetime of session data in seconds.
- </p>
- </item>
+ <item><p>Lifetime of the session data in seconds.</p></item>
- <tag><c><![CDATA[session_cb = atom() <optional>]]></c></tag>
- <item>
- <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[session_cb = atom() <optional>]]></c></tag>
+ <item><p>Name of the session cache callback module that implements
+ the <c>ssl_session_cache_api</c> behavior. Defaults to
+ <c>ssl_session_cache.erl</c>.</p></item>
- <tag><c><![CDATA[session_cb_init_args = list() <optional>]]></c></tag>
- <item>
- <p>
- List of arguments to the init function in session cache
- callback module, defaults to [].
- </p>
- </item>
+ <tag><c><![CDATA[session_cb_init_args = proplist:proplist() <optional>]]></c></tag>
+
+ <item><p>List of extra user-defined arguments to the <c>init</c> function
+ in the session cache callback module. Defaults to <c>[]</c>.</p></item>
<tag><c><![CDATA[ssl_pem_cache_clean = integer() <optional>]]></c></tag>
<item>
@@ -92,10 +87,26 @@
marker="ssl#clear_pem_cache-0">ssl:clear_pem_cache/0</seealso>
</item>
+ <tag><c><![CDATA[alert_timeout = integer() <optional>]]></c></tag>
+ <item>
+ <p>
+ Number of milliseconds between sending of a fatal alert and
+ closing the connection. Waiting a little while improves the
+ peers chances to properly receiving the alert so it may
+ shutdown gracefully. Defaults to 5000 milliseconds.
+ </p>
+ </item>
+
+
</taglist>
</section>
<section>
+ <title>ERROR LOGGER AND EVENT HANDLERS</title>
+ <p>The SSL application uses the default <seealso marker="kernel:error_logger">OTP error logger</seealso> to log unexpected errors and TLS alerts. The logging of TLS alerts may be turned off with the <c>log_alert</c> option. </p>
+ </section>
+
+ <section>
<title>SEE ALSO</title>
<p><seealso marker="kernel:application">application(3)</seealso></p>
</section>
diff --git a/lib/ssl/doc/src/ssl_crl_cache.xml b/lib/ssl/doc/src/ssl_crl_cache.xml
new file mode 100644
index 0000000000..7a67de3971
--- /dev/null
+++ b/lib/ssl/doc/src/ssl_crl_cache.xml
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE erlref SYSTEM "erlref.dtd">
+
+<erlref>
+ <header>
+ <copyright>
+ <year>2015</year><year>2015</year>
+ <holder>Ericsson AB. All Rights Reserved.</holder>
+ </copyright>
+ <legalnotice>
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ </legalnotice>
+ <title>ssl_crl_cache</title>
+ <file>ssl_crl_cache.xml</file>
+ </header>
+
+ <module>ssl_crl_cache</module>
+ <modulesummary>CRL cache </modulesummary>
+ <description>
+ <p>
+ Implements an internal CRL (Certificate Revocation List) cache.
+ In addition to implementing the <seealso
+ marker="ssl_crl_cache_api"> ssl_crl_cache_api</seealso> behaviour
+ the following functions are available.
+ </p>
+ </description>
+
+ <funcs>
+ <func>
+ <name>delete(Entries) -> ok | {error, Reason} </name>
+ <fsummary> </fsummary>
+ <type>
+ <v> Entries = <seealso marker="inets:http_uri">http_uri:uri() </seealso> | {file, string()} | {der, [<seealso
+ marker="public_key:public_key"> public_key:der_encoded() </seealso>]}</v>
+ <v> Reason = term()</v>
+ </type>
+ <desc>
+ <p>Delete CRLs from the ssl applications local cache. </p>
+ </desc>
+ </func>
+ <func>
+ <name>insert(CRLSrc) -> ok | {error, Reason}</name>
+ <name>insert(URI, CRLSrc) -> ok | {error, Reason}</name>
+ <fsummary> </fsummary>
+ <type>
+ <v> CRLSrc = {file, string()} | {der, [ <seealso
+ marker="public_key:public_key"> public_key:der_encoded() </seealso> ]}</v>
+ <v> URI = <seealso marker="inets:http_uri">http_uri:uri() </seealso> </v>
+ <v> Reason = term()</v>
+ </type>
+ <desc>
+ <p>Insert CRLs into the ssl applications local cache. </p>
+ </desc>
+ </func>
+ </funcs>
+</erlref> \ No newline at end of file
diff --git a/lib/ssl/doc/src/ssl_crl_cache_api.xml b/lib/ssl/doc/src/ssl_crl_cache_api.xml
new file mode 100644
index 0000000000..71c1c61fe8
--- /dev/null
+++ b/lib/ssl/doc/src/ssl_crl_cache_api.xml
@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE erlref SYSTEM "erlref.dtd">
+
+<erlref>
+ <header>
+ <copyright>
+ <year>2015</year><year>2015</year>
+ <holder>Ericsson AB. All Rights Reserved.</holder>
+ </copyright>
+ <legalnotice>
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ </legalnotice>
+ <title>ssl_crl_cache_api</title>
+ <file>ssl_crl_cache_api.xml</file>
+ </header>
+
+ <module>ssl_crl_cache_api</module>
+ <modulesummary>API for a SSL/TLS CRL (Certificate Revocation List) cache.</modulesummary>
+ <description>
+ <p>
+ When SSL/TLS performs certificate path validation according to
+ <url href="http://www.ietf.org/rfc/rfc5280.txt">RFC 5280 </url>
+ it should also perform CRL validation checks. To enable the CRL
+ checks the application needs access to CRLs. A database of CRLs
+ can be set up in many different ways. This module provides the
+ behavior of the API needed to integrate an arbitrary CRL cache
+ with the erlang ssl application. It is also used by the
+ application itself to provide a simple default implementation of
+ a CRL cache.
+ </p>
+ </description>
+
+ <section>
+ <title>DATA TYPES</title>
+
+ <p>The following data types are used in the functions below:
+ </p>
+
+ <taglist>
+
+ <tag><c>cache_ref() =</c></tag>
+ <item>opaque()</item>
+ <tag><c>dist_point() =</c></tag>
+ <item><p>#'DistributionPoint'{} see <seealso
+ marker="public_key:public_key_records"> X509 certificates records</seealso></p></item>
+
+ </taglist>
+
+ </section>
+ <funcs>
+ <func>
+ <name>fresh_crl(DistributionPoint, CRL) -> FreshCRL</name>
+ <fsummary> <c>fun fresh_crl/2 </c> will be used as input option <c>update_crl</c> to
+ public_key:pkix_crls_validate/3 </fsummary>
+ <type>
+ <v> DistributionPoint = dist_point() </v>
+ <v> CRL = [<seealso
+ marker="public_key:public_key">public_key:der_encoded()</seealso>] </v>
+ <v> FreshCRL = [<seealso
+ marker="public_key:public_key">public_key:der_encoded()</seealso>] </v>
+ </type>
+ <desc>
+ <p> <c>fun fresh_crl/2 </c> will be used as input option <c>update_crl</c> to
+ <seealso marker="public_key:public_key#pkix_crls_validate-3">public_key:pkix_crls_validate/3 </seealso> </p>
+ </desc>
+ </func>
+
+ <func>
+ <name>lookup(DistributionPoint, DbHandle) -> not_available | CRLs </name>
+ <fsummary> </fsummary>
+ <type>
+ <v> DistributionPoint = dist_point() </v>
+ <v> DbHandle = cache_ref() </v>
+ <v> CRLs = [<seealso
+ marker="public_key:public_key">public_key:der_encoded()</seealso>] </v>
+ </type>
+ <desc> <p>Lookup the CRLs belonging to the distribution point <c> Distributionpoint</c>. </p>
+ This function may choose to only look in the cache or to follow distribution point
+ links depending on how the cache is administrated.
+ </desc>
+ </func>
+
+ <func>
+ <name>select(Issuer, DbHandle) -> CRLs </name>
+ <fsummary>Select the CRLs in the cache that are issued by <c>Issuer</c></fsummary>
+ <type>
+ <v> Issuer = <seealso
+ marker="public_key:public_key">public_key:issuer_name()</seealso></v>
+ <v> DbHandle = cache_ref() </v>
+ </type>
+ <desc>
+ <p>Select the CRLs in the cache that are issued by <c>Issuer</c> </p>
+ </desc>
+ </func>
+ </funcs>
+</erlref> \ No newline at end of file
diff --git a/lib/ssl/doc/src/ssl_distribution.xml b/lib/ssl/doc/src/ssl_distribution.xml
index 4b4d042f70..a347ce5ae6 100644
--- a/lib/ssl/doc/src/ssl_distribution.xml
+++ b/lib/ssl/doc/src/ssl_distribution.xml
@@ -8,16 +8,17 @@
<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.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
@@ -31,23 +32,20 @@
<rev>B</rev>
<file>ssl_distribution.xml</file>
</header>
- <p>This chapter describes how the Erlang distribution can use
- SSL to get additional verification and security.
- </p>
+ <p>This section describes how the Erlang distribution can use
+ SSL to get extra verification and security.</p>
- <section>
- <title>Introduction</title>
- <p>The Erlang distribution can in theory use almost any connection
- based protocol as bearer. A module that implements the protocol
- specific parts of the connection setup is however needed. The
- default distribution module is <c>inet_tcp_dist</c> which is
- included in the Kernel application. When starting an
+ <p>The Erlang distribution can in theory use almost any
+ connection-based protocol as bearer. However, a module that
+ implements the protocol-specific parts of the connection setup is
+ needed. The default distribution module is <c>inet_tcp_dist</c>
+ in the Kernel application. When starting an
Erlang node distributed, <c>net_kernel</c> uses this module to
- setup listen ports and connections. </p>
+ set up listen ports and connections.</p>
- <p>In the SSL application there is an additional distribution
- module, <c>inet_tls_dist</c> which can be used as an
- alternative. All distribution connections will be using SSL and
+ <p>In the SSL application, an exra distribution
+ module, <c>inet_tls_dist</c>, can be used as an
+ alternative. All distribution connections will use SSL and
all participating Erlang nodes in a distributed system must use
this distribution module.</p>
@@ -55,35 +53,45 @@
SSL connection setup. Erlang node cookies are however always
used, as they can be used to differentiate between two different
Erlang networks.</p>
- <p>Setting up Erlang distribution over SSL involves some simple but
- necessary steps:</p>
+
+ <p>To set up Erlang distribution over SSL:</p>
<list type="bulleted">
- <item>Building boot scripts including the SSL application</item>
- <item>Specifying the distribution module for net_kernel</item>
- <item>Specifying security options and other SSL options</item>
+ <item><em>Step 1:</em> Build boot scripts including the
+ SSL application.</item>
+ <item><em>Step 2:</em> Specify the distribution module for
+ <c>net_kernel</c>.</item>
+ <item><em>Step 3:</em> Specify the security options and other
+ SSL options.</item>
+ <item><em>Step 4:</em> Set up the environment to always use SSL.</item>
</list>
- <p>The rest of this chapter describes the above mentioned steps in
- more detail.</p>
- </section>
+
+ <p>The following sections describe these steps.</p>
<section>
- <title>Building boot scripts including the SSL application</title>
+ <title>Building Boot Scripts Including the ssl Application</title>
<p>Boot scripts are built using the <c>systools</c> utility in the
- SASL application. Refer to the SASL documentations
- for more information on systools. This is only an example of
+ <c>sasl</c> application. For more information on <c>systools</c>,
+ see the <c>sasl</c> documentation. This is only an example of
what can be done.</p>
- <p>The simplest boot script possible includes only the Kernel
- and STDLIB applications. Such a script is located in the
- Erlang distributions bin directory. The source for the script
- can be found under the Erlang installation top directory under
- <c><![CDATA[releases/<OTP version>/start_clean.rel]]></c>. Copy that
- script to another location (and preferably another name)
- and add the applications crypto, public_key and SSL with their current version numbers
- after the STDLIB application.</p>
- <p>An example .rel file with SSL added may look like this:</p>
+ <p>The simplest boot script possible includes only the Kernel
+ and STDLIB applications. Such a script is located in the
+ <c>bin</c> directory of the Erlang distribution. The source for the
+ script is found under the Erlang installation top directory under
+ <c><![CDATA[releases/<OTP version>/start_clean.rel]]></c>.</p>
+
+ <p>Do the following:</p>
+ <list type="bulleted">
+ <item><p>Copy that script to another location (and preferably another
+ name).</p></item>
+ <item><p>Add the applications Crypto, Public Key, and
+ SSL with their current version numbers after the
+ STDLIB application.</p></item>
+ </list>
+ <p>The following shows an example <c>.rel</c> file with SSL
+ added:</p>
<code type="none">
{release, {"OTP APN 181 01","R15A"}, {erts, "5.9"},
[{kernel,"2.15"},
@@ -94,23 +102,29 @@
]}.
</code>
- <p>Note that the version numbers surely will differ in your system.
- Whenever one of the applications included in the script is
- upgraded, the script has to be changed.</p>
- <p>Assuming the above .rel file is stored in a file
- <c>start_ssl.rel</c> in the current directory, a boot script
- can be built like this:</p>
+ <p>The version numbers differ in your system. Whenever one of the
+ applications included in the script is upgraded, change the script.</p>
+ <p>Do the following:</p>
+ <list type="bulleted">
+ <item><p>Build the boot script.</p>
+ <p>Assuming the <c>.rel file</c> is stored in a file
+ <c>start_ssl.rel</c> in the current directory, a boot script
+ can be built as follows:</p></item>
+ </list>
<code type="none">
1> systools:make_script("start_ssl",[]). </code>
- <p>There will now be a file <c>start_ssl.boot</c> in the current
- directory. To test the boot script, start Erlang with the
- <c>-boot</c> command line parameter specifying this boot script
- (with its full path but without the <c>.boot</c> suffix), in
- Unix it could look like this:</p>
- <p></p>
+ <p>There is now a <c>start_ssl.boot</c> file in the current
+ directory.</p>
+ <p>Do the following:</p>
+ <list type="bulleted">
+ <item><p>Test the boot script. To do this, start Erlang with the
+ <c>-boot</c> command-line parameter specifying this boot script
+ (with its full path, but without the <c>.boot</c> suffix). In
+ UNIX it can look as follows:</p></item>
+ </list>
<code type="none"><![CDATA[
$ erl -boot /home/me/ssl/start_ssl
Erlang (BEAM) emulator version 5.0
@@ -118,86 +132,99 @@ Erlang (BEAM) emulator version 5.0
Eshell V5.0 (abort with ^G)
1> whereis(ssl_manager).
<0.41.0> ]]></code>
- <p>The <c>whereis</c> function call verifies that the SSL
- application is really started.</p>
- <p>As an alternative to building a bootscript, one can explicitly
+ <p>The <c>whereis</c> function-call verifies that the SSL
+ application is started.</p>
+
+ <p>As an alternative to building a bootscript, you can explicitly
add the path to the SSL <c>ebin</c> directory on the command
- line. This is done with the command line option <c>-pa</c>. This
+ line. This is done with command-line option <c>-pa</c>. This
works as the SSL application does not need to be started for the
distribution to come up, as a clone of the SSL application is
- hooked into the kernel application, so as long as the
- SSL applications code can be reached, the distribution will
- start. The <c>-pa</c> method is only recommended for testing
- purposes.</p>
+ hooked into the Kernel application. So, as long as the
+ SSL application code can be reached, the distribution starts.
+ The <c>-pa</c> method is only recommended for testing purposes.</p>
- <note><p>Note that the clone of the SSL application is necessary to
+ <note><p>The clone of the SSL application must
enable the use of the SSL code in such an early bootstage as
- needed to setup the distribution, however this will make it
+ needed to set up the distribution. However, this makes it
impossible to soft upgrade the SSL application.</p></note>
</section>
<section>
- <title>Specifying distribution module for net_kernel</title>
+ <title>Specifying Distribution Module for net_kernel</title>
<p>The distribution module for SSL is named <c>inet_tls_dist</c>
- and is specified on the command line with the <c>-proto_dist</c>
- option. The argument to <c>-proto_dist</c> should be the module
- name without the <c>_dist</c> suffix, so this distribution
+ and is specified on the command line with option <c>-proto_dist</c>.
+ The argument to <c>-proto_dist</c> is to be the module
+ name without suffix <c>_dist</c>. So, this distribution
module is specified with <c>-proto_dist inet_tls</c> on the
command line.</p>
- <p></p>
- <p>Extending the command line from above gives us the following:</p>
+ <p>Extending the command line gives the following:</p>
<code type="none">
$ erl -boot /home/me/ssl/start_ssl -proto_dist inet_tls </code>
-<p>For the distribution to actually be started, we need to give
-the emulator a name as well:</p>
+<p>For the distribution to be started, give the emulator a name as well:</p>
<code type="none">
$ erl -boot /home/me/ssl/start_ssl -proto_dist inet_tls -sname ssl_test
Erlang (BEAM) emulator version 5.0 [source]
Eshell V5.0 (abort with ^G)
(ssl_test@myhost)1> </code>
- <p>Note however that a node started in this way will refuse to talk
- to other nodes, as no ssl parameters are supplied
- (see below).</p>
+
+ <p>However, a node started in this way refuses to talk
+ to other nodes, as no SSL parameters are supplied
+ (see the next section).</p>
</section>
<section>
- <title>Specifying SSL options</title> <p>For SSL to work, at least
- a public key and certificate needs to be specified for the server
- side. In the following example the PEM-files consists of two
- entries the servers certificate and its private key.</p>
-
- <p>On the <c>erl</c> command line one can specify options that the
- SSL distribution will add when creating a socket.</p>
-
- <p>One can specify the simpler SSL options certfile, keyfile,
- password, cacertfile, verify, reuse_sessions,
- secure_renegotiate, depth, hibernate_after and ciphers (use old
- string format) by adding the prefix server_ or client_ to the
- option name. The server can also take the options dhfile and
- fail_if_no_peer_cert (also prefixed).
- <c>client_</c>-prfixed options are used when the distribution initiates a
- connection to another node and the <c>server_</c>-prefixed options are used
- when accepting a connection from a remote node. </p>
-
- <p> More complex options such as verify_fun are not available at
- the moment but a mechanism to handle such options may be added in
- a future release. </p>
-
- <p> Raw socket options such as packet and size must not be specified on
- the command line</p>.
-
- <p>The command line argument for specifying the SSL options is named
- <c>-ssl_dist_opt</c> and should be followed by pairs of
- SSL options and their values. The <c>-ssl_dist_opt</c> argument can
+ <title>Specifying SSL Options</title>
+ <p>For SSL to work, at least
+ a public key and a certificate must be specified for the server
+ side. In the following example, the PEM-files consist of two
+ entries, the server certificate and its private key.</p>
+
+ <p>On the <c>erl</c> command line you can specify options that the
+ SSL distribution adds when creating a socket.</p>
+
+ <p>The simplest SSL options in the following list can be specified
+ by adding the
+ prefix <c>server_</c> or <c>client_</c> to the option name:</p>
+ <list type="bulleted">
+ <item><c>certfile</c></item>
+ <item><c>keyfile</c></item>
+ <item><c>password</c></item>
+ <item><c>cacertfile</c></item>
+ <item><c>verify</c></item>
+ <item><c>reuse_sessions</c></item>
+ <item><c>secure_renegotiate</c></item>
+ <item><c>depth</c></item>
+ <item><c>hibernate_after</c></item>
+ <item><c>ciphers</c> (use old string format)</item>
+ </list>
+
+ <p>The server can also take the options <c>dhfile</c> and
+ <c>fail_if_no_peer_cert</c> (also prefixed).</p>
+
+ <p><c>client_</c>-prefixed options are used when the distribution
+ initiates a connection to another node. <c>server_</c>-prefixed
+ options are used when accepting a connection from a remote node.</p>
+
+ <p>More complex options, such as <c>verify_fun</c>, are currently not
+ available, but a mechanism to handle such options may be added in
+ a future release.</p>
+
+ <p>Raw socket options, such as <c>packet</c> and <c>size</c> must not
+ be specified on the command line.</p>
+
+ <p>The command-line argument for specifying the SSL options is named
+ <c>-ssl_dist_opt</c> and is to be followed by pairs of
+ SSL options and their values. Argument <c>-ssl_dist_opt</c> can
be repeated any number of times.</p>
- <p>An example command line would now look something like this
+ <p>An example command line can now look as follows
(line breaks in the command are for readability,
- they should not be there when typed):</p>
+ and are not be there when typed):</p>
<code type="none">
$ erl -boot /home/me/ssl/start_ssl -proto_dist inet_tls
-ssl_dist_opt server_certfile "/home/me/ssl/erlserver.pem"
@@ -207,20 +234,20 @@ Erlang (BEAM) emulator version 5.0 [source]
Eshell V5.0 (abort with ^G)
(ssl_test@myhost)1> </code>
- <p>A node started in this way will be fully functional, using SSL
+ <p>A node started in this way is fully functional, using SSL
as the distribution protocol.</p>
</section>
<section>
- <title>Setting up environment to always use SSL</title>
- <p>A convenient way to specify arguments to Erlang is to use the
- <c>ERL_FLAGS</c> environment variable. All the flags needed to
- use SSL distribution can be specified in that variable and will
- then be interpreted as command line arguments for all
+ <title>Setting up Environment to Always Use SSL</title>
+ <p>A convenient way to specify arguments to Erlang is to use environment
+ variable <c>ERL_FLAGS</c>. All the flags needed to
+ use the SSL distribution can be specified in that variable and are
+ then interpreted as command-line arguments for all
subsequent invocations of Erlang.</p>
- <p></p>
- <p>In a Unix (Bourne) shell it could look like this (line breaks for
- readability, they should not be there when typed):</p>
+
+ <p>In a Unix (Bourne) shell, it can look as follows (line breaks are for
+ readability, they are not to be there when typed):</p>
<code type="none">
$ ERL_FLAGS="-boot /home/me/ssl/start_ssl -proto_dist inet_tls
-ssl_dist_opt server_certfile /home/me/ssl/erlserver.pem
@@ -240,7 +267,8 @@ Eshell V5.0 (abort with ^G)
{ssl_dist_opt,["server_secure_renegotiate","true",
"client_secure_renegotiate","true"]
{home,["/home/me"]}] </code>
+
<p>The <c>init:get_arguments()</c> call verifies that the correct
- arguments are supplied to the emulator. </p>
+ arguments are supplied to the emulator.</p>
</section>
</chapter>
diff --git a/lib/ssl/doc/src/ssl_introduction.xml b/lib/ssl/doc/src/ssl_introduction.xml
new file mode 100644
index 0000000000..d3e39dbb01
--- /dev/null
+++ b/lib/ssl/doc/src/ssl_introduction.xml
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE chapter SYSTEM "chapter.dtd">
+
+<chapter>
+ <header>
+ <copyright>
+ <year>2015</year>
+ <year>2015</year>
+ <holder>Ericsson AB, All Rights Reserved</holder>
+ </copyright>
+ <legalnotice>
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+
+ The Initial Developer of the Original Code is Ericsson AB.
+ </legalnotice>
+
+ <title>Introduction</title>
+ <prepared>OTP team</prepared>
+ <docno></docno>
+ <date>2015-03-05</date>
+ <rev>A</rev>
+ <file>ssl_introduction.xml</file>
+ </header>
+
+ <section>
+ <title>Purpose</title>
+ <p>Transport Layer Security (TLS) and its predecessor, the Secure
+ Sockets Layer (SSL), are cryptographic protocols designed to
+ provide communications security over a computer network. The protocols use
+ use X.509 certificates and hence public key (asymmetric) cryptography to
+ authenticate the counterpart with whom they communicate,
+ and to exchange a symmetric key for payload encryption. The protocol provides
+ data/message confidentiality (encryption), integrity (through message authentication code checks)
+ and host verification (through certificate path validation).</p>
+ </section>
+
+ <section>
+ <title>Prerequisites</title>
+ <p>It is assumed that the reader is familiar with the Erlang
+ programming language, the concepts of OTP, and has a basic
+ understanding of SSL/TLS.</p>
+ </section>
+
+</chapter>
diff --git a/lib/ssl/doc/src/ssl_protocol.xml b/lib/ssl/doc/src/ssl_protocol.xml
index 80d9cc4ee8..31a22db58b 100644
--- a/lib/ssl/doc/src/ssl_protocol.xml
+++ b/lib/ssl/doc/src/ssl_protocol.xml
@@ -4,50 +4,60 @@
<chapter>
<header>
<copyright>
- <year>2003</year><year>2013</year>
+ <year>2003</year><year>2015</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.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
- <title>Transport Layer Security (TLS) and its predecessor, Secure Socket Layer (SSL)</title>
+ <title>TLS and its Predecessor, SSL</title>
+ <prepared></prepared>
+ <responsible></responsible>
+ <docno></docno>
+ <approved></approved>
+ <checked></checked>
+ <date></date>
+ <rev></rev>
<file>ssl_protocol.xml</file>
</header>
- <p>The erlang SSL application currently implements the protocol SSL/TLS
- for currently supported versions see <seealso marker="ssl">ssl(3)</seealso>
+ <p>The Erlang SSL application implements the SSL/TLS protocol
+ for the currently supported versions, see the
+ <seealso marker="ssl">ssl(3)</seealso> manual page.
</p>
- <p>By default erlang SSL is run over the TCP/IP protocol even
- though you could plug in any other reliable transport protocol
- with the same API as gen_tcp.</p>
+ <p>By default SSL/TLS is run over the TCP/IP protocol even
+ though you can plug in any other reliable transport protocol
+ with the same Application Programming Interface (API) as the
+ <c>gen_tcp</c> module in Kernel.</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 an 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
+ <p>If a client and a server wants to use an upgrade mechanism, such as
+ defined by RFC 2817, to upgrade a regular TCP/IP connection to an SSL
+ connection, this is supported by the Erlang SSL application API. This can be
+ useful for, for example, supporting HTTP and HTTPS on the same port and
implementing virtual hosting.
</p>
<section>
- <title>Security overview</title>
+ <title>Security Overview</title>
- <p>To achieve 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
+ <p>To achieve authentication and privacy, the client and server
+ perform a TLS handshake procedure before transmitting or receiving
+ any data. During the handshake, they agree on a protocol version and
+ cryptographic algorithms, generate shared secrets using public
+ key cryptographies, and optionally authenticate each other with
digital certificates.</p>
</section>
@@ -55,20 +65,21 @@
<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 algorithms are fast
- compared to public key algorithms (using two keys, a public and a
- private one) and are therefore typically used for encrypting bulk
+ used for both encryption and decryption. These algorithms are fast,
+ compared to public key algorithms (using two keys, one public and one
+ private) 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>
+ in the TLS handshake.</p>
- <p>The TLS handshake 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
+ <p>The TLS handshake protocol and data transfer is run on top of
+ the TLS Record Protocol, which uses a keyed-hash Message
+ Authenticity Code (MAC), or a Hash-based MAC (HMAC),
+ to protect the message 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."
@@ -82,40 +93,43 @@
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 another certificate and so on until you reach the
- so called root certificate that is self signed i.e. issued
+ of trust is built by having the issuer in its turn being
+ certified by another certificate, and so on, until you reach the
+ so called root certificate, which is self-signed, that is, 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
+ <p>Certificates are issued by Certification Authorities (CAs) only.
+ A handful of top CAs in the world issue root certificates. You can
+ examine several of these certificates by clicking
through the menus of your web browser.
</p>
</section>
<section>
- <title>Authentication of Sender</title>
+ <title>Peer Authentication</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>Authentication of the peer is done by public key path
+ validation as defined in RFC 3280. This means basically
+ the following:</p>
+ <list type="bulleted">
+ <item>Each certificate in the certificate chain is issued by the
+ previous one.</item>
+ <item>The certificates attributes are valid.</item>
+ <item>The root certificate is a trusted certificate that is present
+ in the trusted certificate database kept by the peer.</item>
+ </list>
- <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
+ <p>The server always sends a certificate chain as part of
+ the TLS handshake, but the client only sends one if requested
+ by the server. If the client does not have
+ an appropriate certificate, it can 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
+ <p>The client can choose to accept some path evaluation errors,
+ for example, a web browser can ask the user whether to
+ accept an unknown CA root certificate. The server, if it requests
+ a certificate, does however not accept any path validation
+ errors. It is configurable if the server is to accept
or reject an "empty" certificate as response to
a certificate request.</p>
</section>
@@ -123,25 +137,24 @@
<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
+ <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>
<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
+ memory storage, hence session data is lost at application
+ restart or takeover. Users can 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>
+ required. Session data is also invalidated after 24 hours
+ from it was saved, for security reasons. The amount of time the
+ session data is to be saved can be configured.</p>
- <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>
+ <p>By default the SSL clients try to reuse an available session and
+ by default the SSL servers agree to reuse sessions when clients
+ ask for it.</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
index 82de1784ca..bd9330056d 100644
--- a/lib/ssl/doc/src/ssl_session_cache_api.xml
+++ b/lib/ssl/doc/src/ssl_session_cache_api.xml
@@ -4,59 +4,72 @@
<erlref>
<header>
<copyright>
- <year>1999</year><year>2013</year>
+ <year>1999</year><year>2015</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/.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
- 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.
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
<title>ssl</title>
+ <prepared></prepared>
+ <docno></docno>
+ <date></date>
+ <rev></rev>
<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 data storage scheme can be replaced by
- defining a new callback module implementing this API.</modulesummary>
+ <modulesummary>TLS session cache API</modulesummary>
+ <description>Defines the API for the TLS session cache so
+ that the data storage scheme can be replaced by
+ defining a new callback module implementing this API.</description>
<section>
- <title>Common Data Types</title>
+ <title>DATA TYPES</title>
- <p>The following data types are used in the functions below:
- </p>
+ <p>The following data types are used in the functions for
+ <c>ssl_session_cache_api</c>:</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>
+ <taglist>
+ <tag><c>cache_ref() =</c></tag>
+ <item><p><c>opaque()</c></p></item>
+
+ <tag><c>key() =</c></tag>
+ <item><p><c>{partialkey(), session_id()}</c></p></item>
+
+ <tag><c>partialkey() =</c></tag>
+ <item><p><c>opaque()</c></p></item>
+
+ <tag><c>session_id() =</c></tag>
+ <item><p><c>binary()</c></p></item>
+
+ <tag><c>session()</c> =</tag>
+ <item><p><c>opaque()</c></p></item>
+ </taglist>
- <p><c>session() = opaque()</c></p>
-
</section>
<funcs>
<func>
<name>delete(Cache, Key) -> _</name>
- <fsummary></fsummary>
+ <fsummary>Deletes a cache entry.</fsummary>
<type>
- <v> Cache = cache_ref()</v>
- <v> Key = key()</v>
+ <v>Cache = cache_ref()</v>
+ <v>Key = key()</v>
</type>
<desc>
- <p> Deletes a cache entry. Will only be called from the cache
+ <p>Deletes a cache entry. Is only called from the cache
handling process.
</p>
</desc>
@@ -69,41 +82,50 @@
<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>Calls <c>Fun(Elem, AccIn)</c> on successive elements of the
+ cache, starting with <c>AccIn == Acc0</c>. <c>Fun/2</c> must
+ return a new accumulator, which is passed to the next call.
+ The function returns the final value of the accumulator.
+ <c>Acc0</c> is returned if the cache is empty.
</p>
</desc>
</func>
<func>
- <name>init() -> opaque() </name>
- <fsummary>Return cache reference</fsummary>
+ <name>init(Args) -> opaque() </name>
+ <fsummary>Returns cache reference.</fsummary>
<type>
- <v></v>
+ <v>Args = proplists:proplist()</v>
</type>
<desc>
+ <p>Includes property <c>{role, client | server}</c>.
+ Currently this is the only predefined property,
+ there can also be user-defined properties. See also
+ application environment variable
+ <seealso marker="ssl_app">session_cb_init_args</seealso>.
+ </p>
<p>Performs 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 putting the same requirements on it as
- a normal process init function.
+ a reference to it that is used as parameter to the other
+ API functions. Is called by the cache handling processes
+ <c>init</c> function, hence putting the same requirements on it
+ as a normal process <c>init</c> function. This function is
+ called twice when starting the SSL application, once with
+ the role client and once with the role server, as the SSL
+ application must be prepared to take on both roles.
</p>
</desc>
</func>
<func>
<name>lookup(Cache, Key) -> Entry</name>
- <fsummary> Looks up a cache entry.</fsummary>
+ <fsummary>Looks up a cache entry.</fsummary>
<type>
- <v> Cache = cache_ref()</v>
- <v> Key = key()</v>
- <v> Entry = session() | undefined </v>
+ <v>Cache = cache_ref()</v>
+ <v>Key = key()</v>
+ <v>Entry = session() | undefined</v>
</type>
<desc>
- <p>Looks up a cache entry. Should be callable from any
+ <p>Looks up a cache entry. Is to be callable from any
process.
</p>
</desc>
@@ -111,14 +133,14 @@
<func>
<name>select_session(Cache, PartialKey) -> [session()]</name>
- <fsummary>>Selects sessions that could be reused.</fsummary>
+ <fsummary>Selects sessions that can be reused.</fsummary>
<type>
- <v> Cache = cache_ref()</v>
- <v> PartialKey = partialkey()</v>
- <v> Session = session()</v>
+ <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
+ <p>Selects sessions that can be reused. Is to be callable
from any process.
</p>
</desc>
@@ -129,7 +151,7 @@
<fsummary>Called by the process that handles the cache when it
is about to terminate.</fsummary>
<type>
- <v>Cache = term() - as returned by init/0</v>
+ <v>Cache = term() - as returned by init/0</v>
</type>
<desc>
<p>Takes care of possible cleanup that is needed when the
@@ -140,15 +162,15 @@
<func>
<name>update(Cache, Key, Session) -> _</name>
- <fsummary> Caches a new session or updates a already cached one.</fsummary>
+ <fsummary>Caches a new session or updates an already cached one.</fsummary>
<type>
- <v> Cache = cache_ref()</v>
- <v> Key = key()</v>
- <v> Session = session()</v>
+ <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>Caches a new session or updates an already cached one. Is
+ only called from the cache handling process.
</p>
</desc>
</func>
diff --git a/lib/ssl/doc/src/usersguide.xml b/lib/ssl/doc/src/usersguide.xml
index b1c7190085..7bd0ae5c4c 100644
--- a/lib/ssl/doc/src/usersguide.xml
+++ b/lib/ssl/doc/src/usersguide.xml
@@ -8,29 +8,33 @@
<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/.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
- 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.
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
<title>SSL User's Guide</title>
<prepared>OTP Team</prepared>
+ <docno></docno>
<date>2003-05-26</date>
+ <rev></rev>
<file>usersguide.sgml</file>
</header>
<description>
- <p>The <em>SSL</em> application provides secure communication over
+ <p>The Secure Socket Layer (SSL) application provides secure communication over
sockets.
</p>
</description>
+ <xi:include href="ssl_introduction.xml"/>
<xi:include href="ssl_protocol.xml"/>
<xi:include href="using_ssl.xml"/>
<xi:include href="ssl_distribution.xml"/>
diff --git a/lib/ssl/doc/src/using_ssl.xml b/lib/ssl/doc/src/using_ssl.xml
index cce388d02a..b6a4bb5bec 100644
--- a/lib/ssl/doc/src/using_ssl.xml
+++ b/lib/ssl/doc/src/using_ssl.xml
@@ -8,139 +8,145 @@
<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.
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
</legalnotice>
- <title>Using the SSL API</title>
+ <title>Using SSL API</title>
+ <prepared></prepared>
+ <responsible></responsible>
+ <docno></docno>
+ <approved></approved>
+ <checked></checked>
+ <date></date>
+ <rev></rev>
<file>using_ssl.xml</file>
</header>
-
- <section>
- <title>General information</title>
- <p>To see relevant version information for ssl you can
- call ssl:versions/0</p>
+ <p>To see relevant version information for ssl, call
+ <seealso marker="ssl:ssl#versions-0"><c>ssl:versions/0</c></seealso>
+ .</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>
+ <p>To see all supported cipher suites, call <seealso marker="ssl:ssl#cipher_suites-1"><c>ssl:cipher_suites(all)</c> </seealso>.
+ The available cipher suites for a connection depend on your certificate.
+ Specific cipher suites that you want your connection to use can also be
+ specified. Default is to use the strongest available.</p>
<section>
- <title>Setting up connections</title>
+ <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>
+ <p>This section shows a small example of how to set up client/server connections
+ using the Erlang shell. The returned value of the <c>sslsocket</c> is abbreviated
+ with <c>[...]</c> as it can be fairly large and is opaque.</p>
<section>
- <title>Minmal example</title>
+ <title>Minimal Example</title>
- <note><p> The minimal setup is not the most secure setup of ssl.</p>
+ <note><p> The minimal setup is not the most secure setup of SSL.</p>
</note>
-
- <p> Start server side</p>
+
+ <p>To set up client/server connections:</p>
+
+ <p><em>Step 1:</em> Start the server side:</p>
<code type="erl">1 server> ssl:start().
ok</code>
- <p>Create an ssl listen socket</p>
+ <p><em>Step 2:</em> Create an 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>
+ <p><em>Step 3:</em> 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>
+ <p><em>Step 4:</em> Start the 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>
+ <p><em>Step 5:</em> Do the SSL handshake:</p>
<code type="erl">4 server> ok = ssl:ssl_accept(Socket).
ok</code>
- <p>Send a messag over ssl</p>
+ <p><em>Step 6:</em> Send a message 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>
+ <p><em>Step 7:</em> Flush the shell message queue to see that the message
+ was 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>
+ <title>Upgrade Example</title>
- <note><p> To upgrade a TCP/IP connection to an 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>
+ <note><p>To upgrade a TCP/IP connection to an SSL connection, the
+ client and server must agree to do so. The agreement
+ can be accomplished by using a protocol, for example, the one used by HTTP
+ specified in RFC 2817.</p></note>
+
+ <p>To upgrade to an SSL connection:</p>
- <p>Start server side</p>
+ <p><em>Step 1:</em> Start the server side:</p>
<code type="erl">1 server> ssl:start().
ok</code>
- <p>Create a normal tcp listen socket</p>
+ <p><em>Step 2:</em> Create a normal TCP listen socket:</p>
<code type="erl">2 server> {ok, ListenSocket} = gen_tcp:listen(9999, [{reuseaddr, true}]).
{ok, #Port&lt;0.475&gt;}</code>
- <p>Accept client connection</p>
+ <p><em>Step 3:</em> Accept client connection:</p>
<code type="erl">3 server> {ok, Socket} = gen_tcp:accept(ListenSocket).
{ok, #Port&lt;0.476&gt;}</code>
- <p>Start client side</p>
+ <p><em>Step 4:</em> Start the 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 an ssl connection, otherwhise
- ssl handshake messages may be deliverd to the wrong process.</p>
+ <p><em>Step 5:</em> Ensure <c>active</c> is set to <c>false</c> before trying
+ to upgrade a connection to an SSL connection, otherwise
+ SSL handshake messages can be delivered to the wrong process:</p>
<code type="erl">4 server> inet:setopts(Socket, [{active, false}]).
ok</code>
- <p>Do the ssl handshake.</p>
+ <p><em>Step 6:</em> 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 an 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>
+ <p><em>Step 7:</em> Upgrade to an SSL connection. The client and server
+ must agree upon the upgrade. The server must call
+ <c>ssl:accept/2</c> before the client calls <c>ssl:connect/3.</c></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>
+ <p><em>Step 8:</em> Send a message over SSL:</p>
<code type="erl">4 client> ssl:send(SSLSocket, "foo").
ok</code>
- <p>Set active true on the ssl socket</p>
+ <p><em>Step 9:</em> Set <c>active true</c> 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>
+ <p><em>Step 10:</em> Flush the shell message queue to see that the message
+ was sent on the client side:</p>
<code type="erl">5 server> flush().
Shell got {ssl,{sslsocket,[...]},"foo"}
ok</code>
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 02:59:21 +0000