diff options
Diffstat (limited to 'lib/ssh/doc/src')
| -rw-r--r-- | lib/ssh/doc/src/notes.xml | 10 | ||||
| -rw-r--r-- | lib/ssh/doc/src/ssh.xml | 28 | ||||
| -rw-r--r-- | lib/ssh/doc/src/ssh_app.xml | 211 | ||||
| -rw-r--r-- | lib/ssh/doc/src/ssh_connection.xml | 6 | ||||
| -rw-r--r-- | lib/ssh/doc/src/using_ssh.xml | 6 |
5 files changed, 220 insertions, 41 deletions
diff --git a/lib/ssh/doc/src/notes.xml b/lib/ssh/doc/src/notes.xml index bb111c8e0e..012d7051eb 100644 --- a/lib/ssh/doc/src/notes.xml +++ b/lib/ssh/doc/src/notes.xml @@ -4,7 +4,7 @@ <chapter> <header> <copyright> - <year>2004</year><year>2014</year> + <year>2004</year><year>2015</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -216,9 +216,9 @@ <p> Thanks to Simon Cornish</p> <p> - Own Id: OTP-12760 Aux Id: <a + Own Id: OTP-12760 Aux Id: <url href="https://github.com/erlang/otp/pull/715">pull req - 715</a> </p> + 715</url> </p> </item> <item> <p> @@ -384,13 +384,13 @@ </item> <item> <p> - Made Codenomicon Defensics test suite pass: <list> + Made Codenomicon Defensics test suite pass:</p> <list> <item>limit number of algorithms in kexinit message</item> <item>check 'e' and 'f' parameters in kexdh</item> <item>implement 'keyboard-interactive' user authentication on server side</item> <item> return plain text message to bad version exchange message</item> - </list></p> + </list> <p> Own Id: OTP-12784</p> </item> diff --git a/lib/ssh/doc/src/ssh.xml b/lib/ssh/doc/src/ssh.xml index 0e5a0706f5..1e9acf4a99 100644 --- a/lib/ssh/doc/src/ssh.xml +++ b/lib/ssh/doc/src/ssh.xml @@ -32,34 +32,10 @@ <modulesummary>Main API of the ssh application</modulesummary> <description> <p>Interface module for the <c>ssh</c> application.</p> + <p>See <seealso marker="ssh:SSH_app#supported">ssh(6)</seealso> for details of supported version, + algorithms and unicode support.</p> </description> - <section> - <title>SSH</title> - <marker id="supported"/> - <list type="bulleted"> - <item>For application dependencies see <seealso marker="SSH_app"> ssh(6)</seealso> </item> - <item>Supported SSH version is 2.0.</item> - <item>Supported public key algorithms: ecdsa-sha2-nistp256, ecdsa-sha2-nistp384, ecdsa-sha2-nistp521, ssh-rsa and ssh-dss.</item> - <item>Supported MAC algorithms: hmac-sha2-256, hmac-sha2-512 and hmac-sha1.</item> - <item>Supported encryption algorithms: aes256-ctr, aes192-ctr, aes128-ctr, aes128-cb and 3des-cbc.</item> - <item>Supported key exchange algorithms: ecdh-sha2-nistp256, ecdh-sha2-nistp384, ecdh-sha2-nistp521, diffie-hellman-group14-sha1, diffie-hellman-group-exchange-sha1, diffie-hellman-group-exchange-sha256 and diffie-hellman-group1-sha1</item> - <item>Supported compression algorithms: none, [email protected] and zlib</item> - <item>Supports unicode filenames if the emulator and the underlaying OS support it. - See section DESCRIPTION in the - <seealso marker="kernel:file">file</seealso> manual page in <c>kernel</c> - for information about this subject.</item> - <item>Supports unicode in shell and CLI.</item> - </list> - <p>The actual set of algorithms can vary depending on which OpenSSL crypto library that is installed on the machine. - For the list on a particular installation, use the command <seealso marker="#default_algorithms/0">default_algorithms/0</seealso>. - The user may override the default algorithm configuration both on the server side and the client side. - See the option preferred_algorithms in the <seealso marker="#daemon/1">daemon</seealso> and - <seealso marker="#connect/3">connect</seealso> functions. -</p> - - </section> - <section> <title>OPTIONS</title> <p>The exact behaviour of some functions can be adjusted with the use of options which are documented together diff --git a/lib/ssh/doc/src/ssh_app.xml b/lib/ssh/doc/src/ssh_app.xml index 4c85585820..79dd1e210e 100644 --- a/lib/ssh/doc/src/ssh_app.xml +++ b/lib/ssh/doc/src/ssh_app.xml @@ -41,15 +41,18 @@ <section> <title>DEPENDENCIES</title> - <p>The <c>ssh</c> application uses the applications <c>public_key</c> and - <c>crypto</c> to handle public keys and encryption. Hence, these + <p>The <c>ssh</c> application uses the applications + <seealso marker="public_key:public_key">public_key</seealso> and + <seealso marker="crypto:crypto">crypto</seealso> + to handle public keys and encryption. Hence, these applications must be loaded for the <c>ssh</c> application to work. In an embedded environment this means that they must be started with - <c>application:start/[1,2]</c> before the <c>ssh</c> application is started. + <seealso marker="kernel:application#start/1">application:start/1,2</seealso> before the + <c>ssh</c> application is started. </p> </section> - <section> + <section> <title>CONFIGURATION</title> <p>The <c>ssh</c> application does not have an application- @@ -62,10 +65,13 @@ <item><c>authorized_keys2</c></item> <item><c>id_dsa</c></item> <item><c>id_rsa</c></item> + <item><c>id_ecdsa</c></item> <item><c>ssh_host_dsa_key</c></item> <item><c>ssh_host_rsa_key</c></item> + <item><c>ssh_host_ecdsa_key</c></item> </list> <p>By default, <c>ssh</c> looks for <c>id_dsa</c>, <c>id_rsa</c>, + <c>id_ecdsa_key</c>, <c>known_hosts</c>, and <c>authorized_keys</c> in ~/.ssh, and for the host key files in <c>/etc/ssh</c>. These locations can be changed by the options <c>user_dir</c> and <c>system_dir</c>. @@ -79,7 +85,7 @@ </section> <section> <title>Public Keys</title> - <p><c>id_dsa</c> and <c>id_rsa</c> are the users private key files. + <p><c>id_dsa</c>, <c>id_rsa</c> and <c>id_ecdsa</c> are the users private key files. Notice that the public key is part of the private key so the <c>ssh</c> application does not use the <c>id_<*>.pub</c> files. These are for the user's convenience when it is needed to convey the user's @@ -104,8 +110,8 @@ <section> <title>Host Keys</title> <p>RSA and DSA host keys are supported and are - expected to be found in files named <c>ssh_host_rsa_key</c> and - <c>ssh_host_dsa_key</c>. + expected to be found in files named <c>ssh_host_rsa_key</c>, + <c>ssh_host_dsa_key</c> and <c>ssh_host_ecdsa_key</c>. </p> </section> <section> @@ -114,6 +120,197 @@ </section> <section> + <marker id="supported"/> + <title>SUPPORTED SPECIFICATIONS AND STANDARDS</title> + <p>The supported SSH version is 2.0.</p> + </section> + <section> + <title>Algorithms</title> + <p>The actual set of algorithms may vary depending on which OpenSSL crypto library that is installed on the machine. + For the list on a particular installation, use the command + <seealso marker="ssh:ssh#default_algorithms/0">ssh:default_algorithms/0</seealso>. + The user may override the default algorithm configuration both on the server side and the client side. + See the option <c>preferred_algorithms</c> in the <seealso marker="ssh:ssh#daemon/1">ssh:daemon/1,2,3</seealso> and + <seealso marker="ssh:ssh#connect/3">ssh:connect/3,4</seealso> functions. + </p> + + <p>Supported algorithms are:</p> + + <taglist> + <tag>Key exchange algorithms</tag> + <item> + <list type="bulleted"> + <item>ecdh-sha2-nistp256</item> + <item>ecdh-sha2-nistp384</item> + <item>ecdh-sha2-nistp521</item> + <item>diffie-hellman-group-exchange-sha1</item> + <item>diffie-hellman-group-exchange-sha256</item> + <item>diffie-hellman-group14-sha1</item> + <item>diffie-hellman-group1-sha1</item> + </list> + </item> + + <tag>Public key algorithms</tag> + <item> + <list type="bulleted"> + <item>ecdsa-sha2-nistp256</item> + <item>ecdsa-sha2-nistp384</item> + <item>ecdsa-sha2-nistp521</item> + <item>ssh-rsa</item> + <item>ssh-dss</item> + </list> + </item> + + <tag>MAC algorithms</tag> + <item> + <list type="bulleted"> + <item>hmac-sha2-256</item> + <item>hmac-sha2-512</item> + <item>hmac-sha1</item> + </list> + </item> + + <tag>Encryption algorithms (ciphers)</tag> + <item> + <list type="bulleted"> + <item>[email protected] (AEAD_AES_128_GCM)</item> + <item>[email protected] (AEAD_AES_256_GCM)</item> + <item>aes128-ctr</item> + <item>aes192-ctr</item> + <item>aes256-ctr</item> + <item>aes128-cbc</item> + <item>3des-cbc</item> + </list> + <p>Following the internet de-facto standard, the cipher and mac algorithm AEAD_AES_128_GCM is selected when the + cipher [email protected] is negotiated. The cipher and mac algorithm AEAD_AES_256_GCM is selected when the + cipher [email protected] is negotiated. + </p> + <p>See the text at the description of <seealso marker="#rfc5647_note">the rfc 5647 further down</seealso> + for more information. + </p> + </item> + + <tag>Compression algorithms</tag> + <item> + <list type="bulleted"> + <item>none</item> + <item>[email protected]</item> + <item>zlib</item> + </list> + </item> + </taglist> + </section> + <section> + <title>Unicode support</title> + <p>Unicode filenames are supported if the emulator and the underlaying OS support it. See section DESCRIPTION in the + <seealso marker="kernel:file">file</seealso> manual page in <c>kernel</c> for information about this subject. + </p> + <p>The shell and the cli both support unicode. + </p> + </section> + + <section> + <title>Rfcs</title> + <p>The following rfc:s are supported:</p> + <list type="bulleted"> + <item><url href="https://tools.ietf.org/html/rfc4251">RFC 4251</url>, The Secure Shell (SSH) Protocol Architecture. + <p>Except + <list type="bulleted"> + <item>9.4.6 Host-Based Authentication</item> + <item>9.5.2 Proxy Forwarding</item> + <item>9.5.3 X11 Forwarding</item> + </list> + </p> + </item> + + <item><url href="https://tools.ietf.org/html/rfc4252">RFC 4252</url>, The Secure Shell (SSH) Authentication Protocol. + <p>Except + <list type="bulleted"> + <item>9. Host-Based Authentication: "hostbased"</item> + </list> + </p> + </item> + + <item><url href="https://tools.ietf.org/html/rfc4253">RFC 4253</url>, The Secure Shell (SSH) Transport Layer Protocol. + <p></p> + </item> + + <item><url href="https://tools.ietf.org/html/rfc4254">RFC 4254</url>, The Secure Shell (SSH) Connection Protocol. + <p>Except + <list type="bulleted"> + <item>6.3. X11 Forwarding</item> + <item>7. TCP/IP Port Forwarding</item> + </list> + </p> + </item> + + <item><url href="https://tools.ietf.org/html/rfc4256">RFC 4256</url>, Generic Message Exchange Authentication for + the Secure Shell Protocol (SSH). + <p>Except + <list type="bulleted"> + <item><c>num-prompts > 1</c></item> + <item>password changing</item> + <item>other identification methods than userid-password</item> + </list> + </p> + </item> + + <item><url href="https://tools.ietf.org/html/rfc4419">RFC 4419</url>, Diffie-Hellman Group Exchange for + the Secure Shell (SSH) Transport Layer Protocol. + <p></p> + </item> + + <item><url href="https://tools.ietf.org/html/rfc4716">RFC 4716</url>, The Secure Shell (SSH) Public Key File Format. + <p></p> + </item> + + <item><url href="https://tools.ietf.org/html/rfc5647">RFC 5647</url>, AES Galois Counter Mode for + the Secure Shell Transport Layer Protocol. + <p><marker id="rfc5647_note"/>There is an ambiguity in the synchronized selection of cipher and mac algorithm. + This is resolved by OpenSSH in the ciphers [email protected] and [email protected] which are implemented. + If the explicit ciphers and macs AEAD_AES_128_GCM or AEAD_AES_256_GCM are needed, + they could be enabled with the option preferred_algorithms. + <warning> + If the client or the server is not Erlang/OTP, it is the users responsibility to check that + other implementation has the same interpretation of AEAD_AES_*_GCM as the Erlang/OTP SSH before + enabling them. The aes*[email protected] variants are always safe to use since they lack the + ambiguity. + </warning> + </p> + <p>The second paragraph in section 5.1 is resolved as: + <list type="ordered"> + <item>If the negotiated cipher is AEAD_AES_128_GCM, the mac algorithm is set to AEAD_AES_128_GCM.</item> + <item>If the negotiated cipher is AEAD_AES_256_GCM, the mac algorithm is set to AEAD_AES_256_GCM.</item> + <item>If the mac algorithm is AEAD_AES_128_GCM, the cipher is set to AEAD_AES_128_GCM.</item> + <item>If the mac algorithm is AEAD_AES_256_GCM, the cipher is set to AEAD_AES_256_GCM.</item> + </list> + The first rule that matches when read in order from the top is applied + </p> + </item> + + <item><url href="https://tools.ietf.org/html/rfc5656">RFC 5656</url>, Elliptic Curve Algorithm Integration in + the Secure Shell Transport Layer. + <p>Except + <list type="bulleted"> + <item>5. ECMQV Key Exchange</item> + <item>6.4. ECMQV Key Exchange and Verification Method Name</item> + <item>7.2. ECMQV Message Numbers</item> + <item>10.2. Recommended Curves</item> + </list> + </p> + </item> + + <item><url href="https://tools.ietf.org/html/rfc6668">RFC 6668</url>, SHA-2 Data Integrity Verification for + the Secure Shell (SSH) Transport Layer Protocol + <p>Comment: Defines hmac-sha2-256 and hmac-sha2-512 + </p> + </item> + + </list> + + </section> + + <section> <title>SEE ALSO</title> <p><seealso marker="kernel:application">application(3)</seealso></p> </section> diff --git a/lib/ssh/doc/src/ssh_connection.xml b/lib/ssh/doc/src/ssh_connection.xml index 9a7bb09b12..064a623eb6 100644 --- a/lib/ssh/doc/src/ssh_connection.xml +++ b/lib/ssh/doc/src/ssh_connection.xml @@ -373,6 +373,9 @@ <desc> <p>Is to be called by client- and server-channel processes to send data to each other. </p> + <p>The function <seealso marker="ssh:ssh_connection#subsystem/4">subsystem/4</seealso> and subsequent + calls of <c>send/3,4,5</c> must be executed in the same process. + </p> </desc> </func> @@ -454,6 +457,9 @@ <p>Is to be called by a client-channel process for requesting to execute a predefined subsystem on the server. </p> + <p>The function <c>subsystem/4</c> and subsequent calls of + <seealso marker="ssh:ssh_connection#send/3">send/3,4,5</seealso> must be executed in the same process. + </p> </desc> </func> diff --git a/lib/ssh/doc/src/using_ssh.xml b/lib/ssh/doc/src/using_ssh.xml index 91185a0f6e..6826f20fb3 100644 --- a/lib/ssh/doc/src/using_ssh.xml +++ b/lib/ssh/doc/src/using_ssh.xml @@ -234,7 +234,7 @@ <title>SFTP Client with TAR Compression and Encryption</title> <p>Example of writing and then reading a tar file follows:</p> - <code type="erlang"> + <code type="erl"> {ok,HandleWrite} = ssh_sftp:open_tar(ChannelPid, ?tar_file_name, [write]), ok = erl_tar:add(HandleWrite, .... ), ok = erl_tar:add(HandleWrite, .... ), @@ -249,10 +249,10 @@ </code> <p>The previous write and read example can be extended with encryption and decryption as follows:</p> - <code type="erlang"> + <code type="erl"> %% First three parameters depending on which crypto type we select: Key = <<"This is a 256 bit key. abcdefghi">>, -Ivec0 = crypto:rand_bytes(16), +Ivec0 = crypto:strong_rand_bytes(16), DataSize = 1024, % DataSize rem 16 = 0 for aes_cbc %% Initialization of the CryptoState, in this case it is the Ivector. |