diff options
Diffstat (limited to 'lib/ssl/doc/src/ssl.xml')
| -rw-r--r-- | lib/ssl/doc/src/ssl.xml | 120 |
1 files changed, 74 insertions, 46 deletions
diff --git a/lib/ssl/doc/src/ssl.xml b/lib/ssl/doc/src/ssl.xml index 3db5aa19ac..4f72114ae9 100644 --- a/lib/ssl/doc/src/ssl.xml +++ b/lib/ssl/doc/src/ssl.xml @@ -32,7 +32,7 @@ <modulesummary>Interface Functions for Secure Socket Layer</modulesummary> <description> <p> - This module contains interface functions for the SSL/TLS protocol. + This module contains interface functions for the SSL/TLS/DTLS protocol. For detailed information about the supported standards see <seealso marker="ssl_app">ssl(6)</seealso>. </p> @@ -40,7 +40,7 @@ <section> <title>DATA TYPES</title> - <p>The following data types are used in the functions for SSL:</p> + <p>The following data types are used in the functions for SSL/TLS/DTLS:</p> <taglist> @@ -56,9 +56,11 @@ <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> + <seealso marker="kernel:inet">inet(3)</seealso>, + <seealso marker="kernel:gen_tcp">gen_tcp(3)</seealso> and + <seealso marker="kernel:gen_tcp">gen_udp(3)</seealso> + manual pages + in Kernel. Note that stream oriented options such as packet are only relevant for SSL/TLS and not DTLS</p></item> <tag><marker id="type-ssloption"/><c>ssl_option() =</c></tag> <item> @@ -95,13 +97,14 @@ <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 + <p>Defaults to <c>{gen_tcp, tcp, tcp_closed, tcp_error}</c> for TLS + and <c>{gen_udp, udp, udp_closed, udp_error}</c> for DTLS. Can be used + to customize the transport layer. For TLS 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> + directly. For DTLS this feature must be considered exprimental.</p> <taglist> <tag><c>CallbackModule =</c></tag> <item><p><c>atom()</c></p></item> @@ -137,10 +140,15 @@ <tag><c>sslsocket() =</c></tag> <item><p>opaque()</p></item> - - <tag><marker id="type-protocol"/><c>protocol_version() =</c></tag> + + <tag><marker id="type-protocol"/><c> protocol_version() =</c></tag> + <item><p><c> ssl_tls_protocol() | dtls_protocol() </c></p></item> + <item><p><c>sslv3 | tlsv1 | 'tlsv1.1' | 'tlsv1.2'</c></p></item> + <tag><marker id="type-protocol"/><c> dtls_protocol() =</c></tag> + <item><p><c>'dtlsv1' | 'dtlsv1.2'</c></p></item> + <tag><c>ciphers() =</c></tag> <item><p><c>= [ciphersuite()]</c></p> <p>Tuples and string formats accepted by versions @@ -193,7 +201,7 @@ </section> <section> - <title>SSL OPTION DESCRIPTIONS - COMMON for SERVER and CLIENT</title> + <title>TLS/DTLS OPTION DESCRIPTIONS - COMMON for SERVER and CLIENT</title> <p>The following options have the same meaning in the client and the server:</p> @@ -298,11 +306,11 @@ atom()}} | <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> + sent to the peer, and the TLS/DTLS 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 + <c>{valid, UserState}</c>, the TLS/DTLS 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, @@ -466,14 +474,15 @@ marker="public_key:public_key#pkix_path_validation-3">public_key:pkix_path_valid with the selected CA as trusted anchor and the rest of the chain.</p></item> <tag><c>{versions, [protocol_version()]}</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 + <c>protocol_version</c> and <c>dtls_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> + <item><p>When an integer-value is specified, <c>TLS/DTLS-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 @@ -533,7 +542,7 @@ fun(srp, Username :: string(), UserState :: term()) -> </section> <section> - <title>SSL OPTION DESCRIPTIONS - CLIENT SIDE</title> + <title>TLS/DTLS OPTION DESCRIPTIONS - CLIENT SIDE</title> <p>The following options are client-specific or have a slightly different meaning in the client than in the server:</p> @@ -673,7 +682,7 @@ fun(srp, Username :: string(), UserState :: term()) -> </section> <section> - <title>SSL OPTION DESCRIPTIONS - SERVER SIDE</title> + <title>TLS/DTLS OPTION DESCRIPTIONS - SERVER SIDE</title> <p>The following options are server-specific or have a slightly different meaning in the server than in the client:</p> @@ -711,7 +720,7 @@ fun(srp, Username :: string(), UserState :: term()) -> </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. + <item><p>Used together with <c>{verify, verify_peer}</c> by an TLS/DTLS 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 @@ -725,7 +734,7 @@ fun(srp, Username :: string(), UserState :: term()) -> <tag><c>{reuse_session, fun(SuggestedSessionId, PeerCert, Compression, CipherSuite) -> boolean()}</c></tag> - <item><p>Enables the SSL server to have a local policy + <item><p>Enables the TLS/DTLS 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 @@ -823,7 +832,7 @@ 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 TLS/DTLS 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> @@ -884,7 +893,8 @@ fun(srp, Username :: string(), UserState :: term()) -> <v> Supported = default | all | anonymous </v> <v> Version = protocol_version() </v> </type> - <desc><p>Returns all default or all supported (except anonymous), or all anonymous cipher suites for a + <desc><p>Returns all default or all supported (except anonymous), + or all anonymous cipher suites for a TLS version</p> </desc> </func> @@ -899,7 +909,7 @@ fun(srp, Username :: string(), UserState :: term()) -> supported protocols and then deduplicating the output.</p> </desc> </func> - + <func> <name>clear_pem_cache() -> ok </name> <fsummary> Clears the pem cache</fsummary> @@ -914,20 +924,20 @@ fun(srp, Username :: string(), UserState :: term()) -> <func> <name>connect(Socket, SslOptions) -> </name> - <name>connect(Socket, SslOptions, Timeout) -> {ok, SslSocket} + <name>connect(Socket, SslOptions, Timeout) -> {ok, TLSSocket} | {error, Reason}</name> <fsummary>Upgrades a <c>gen_tcp</c>, or - equivalent, connected socket to an SSL socket.</fsummary> + equivalent, connected socket to an TLS socket.</fsummary> <type> <v>Socket = socket()</v> <v>SslOptions = [ssl_option()]</v> <v>Timeout = integer() | infinity</v> - <v>SslSocket = sslsocket()</v> + <v>TLSSocket = sslsocket()</v> <v>Reason = term()</v> </type> <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> + connected socket to an TLS socket, that is, performs the + client-side TLS handshake.</p> <note><p>If the option <c>verify</c> is set to <c>verify_peer</c> the option <c>server_name_indication</c> shall also be specified, @@ -941,7 +951,7 @@ 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 <c>Host</c>, <c>Port</c>.</fsummary> + <fsummary>Opens an TLS/DTLS connection to <c>Host</c>, <c>Port</c>.</fsummary> <type> <v>Host = host()</v> <v>Port = integer()</v> @@ -950,13 +960,13 @@ fun(srp, Username :: string(), UserState :: term()) -> <v>SslSocket = sslsocket()</v> <v>Reason = term()</v> </type> - <desc><p>Opens an SSL connection to <c>Host</c>, <c>Port</c>.</p> + <desc><p>Opens an TLS/DTLS connection to <c>Host</c>, <c>Port</c>.</p> <p> When the option <c>verify</c> is set to <c>verify_peer</c> the check <seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname/2</seealso> will be performed in addition to the usual x509-path validation checks. If the check fails the error {bad_cert, hostname_check_failed} will be propagated to the path validation fun <seealso marker="#verify_fun">verify_fun</seealso>, where it is possible to do customized - checks by using the full possibilitis of the <seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname/2</seealso> API. + checks by using the full possibilities of the <seealso marker="public_key:public_key#pkix_verify_hostname-3">public_key:pkix_verify_hostname/3</seealso> API. When the option <c>server_name_indication</c> is provided, its value (the DNS name) will be used as <c>ReferenceID</c> to <seealso marker="public_key:public_key#pkix_verify_hostname-2">public_key:pkix_verify_hostname/2</seealso>. @@ -972,24 +982,24 @@ fun(srp, Username :: string(), UserState :: term()) -> <func> <name>close(SslSocket) -> ok | {error, Reason}</name> - <fsummary>Closes an SSL connection.</fsummary> + <fsummary>Closes an TLS/DTLS connection.</fsummary> <type> <v>SslSocket = sslsocket()</v> <v>Reason = term()</v> </type> - <desc><p>Closes an SSL connection.</p> + <desc><p>Closes an TLS/DTLS connection.</p> </desc> </func> <func> <name>close(SslSocket, How) -> ok | {ok, port()} | {error, Reason}</name> - <fsummary>Closes an SSL connection.</fsummary> + <fsummary>Closes an TLS 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 latter case the transport + <desc><p>Closes or downgrades an TLS connection. In the latter case the transport connection will be handed over to the <c>NewController</c> process after receiving the TLS close alert from the peer. The returned transport socket will have the following options set: <c>[{active, false}, {packet, 0}, {mode, binary}]</c></p> @@ -1000,7 +1010,7 @@ fun(srp, Username :: string(), UserState :: term()) -> <name>controlling_process(SslSocket, NewOwner) -> ok | {error, Reason}</name> <fsummary>Assigns a new controlling process to the - SSL socket.</fsummary> + TLS/DTLS socket.</fsummary> <type> <v>SslSocket = sslsocket()</v> <v>NewOwner = pid()</v> @@ -1194,7 +1204,7 @@ fun(srp, Username :: string(), UserState :: term()) -> 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> + <p>Can only be used with TLS/DTLS connections; <c>{error, undefined}</c> is returned for SSLv3 connections.</p> </desc> </func> @@ -1294,7 +1304,7 @@ fun(srp, Username :: string(), UserState :: term()) -> <v>Reason = term()</v> </type> <desc> - <p>Performs the SSL/TLS server-side handshake.</p> + <p>Performs the SSL/TLS/DTLS 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> @@ -1304,7 +1314,7 @@ 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>Performs server-side SSL/TLS handshake.</fsummary> + <fsummary>Performs server-side SSL/TLS/DTLS handshake.</fsummary> <type> <v>Socket = socket() | sslsocket() </v> <v>SslOptions = [ssl_option()]</v> @@ -1321,10 +1331,10 @@ fun(srp, Username :: string(), UserState :: term()) -> by calling this function, else the upgrade succeeds or does not succeed depending on timing.</p></warning> - <p>If <c>Socket</c> is an <c>sslsocket()</c>: provides extra SSL/TLS + <p>If <c>Socket</c> is an <c>sslsocket()</c>: provides extra SSL/TLS/DTLS options to those specified in <seealso marker="#listen-2">ssl:listen/2 </seealso> and then performs - the SSL/TLS handshake. + the SSL/TLS/DTLS handshake. </p> </desc> </func> @@ -1383,7 +1393,7 @@ fun(srp, Username :: string(), UserState :: term()) -> The socket returned is to be passed to <seealso marker="#ssl_accept-2"> ssl:ssl_accept[2,3]</seealso> to complete handshaking, that is, - establishing the SSL/TLS connection.</p> + establishing the SSL/TLS/DTLS connection.</p> <warning> <p>The socket returned can only be used with <seealso marker="#ssl_accept-2"> ssl:ssl_accept[2,3]</seealso>. @@ -1405,7 +1415,8 @@ fun(srp, Username :: string(), UserState :: term()) -> <fsummary>Returns version information relevant for the SSL application.</fsummary> <type> - <v>versions_info() = {app_vsn, string()} | {supported | available, [protocol_version()] </v> + <v>versions_info() = {app_vsn, string()} | {supported | available, [ssl_tls_protocol()]} | + {supported_dtls | available_dtls, [dtls_protocol()]} </v> </type> <desc> <p>Returns version information relevant for the SSL @@ -1415,19 +1426,35 @@ fun(srp, Username :: string(), UserState :: term()) -> <item>The application version of the SSL application.</item> <tag><c>supported</c></tag> - <item>TLS/SSL versions supported by default. + <item>SSL/TLS 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 + For the negotiated SSL/TLS version, see <seealso marker="#connection_information-1">ssl:connection_information/1 </seealso>.</item> - + + <tag><c>supported_dtls</c></tag> + <item>DTLS 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 DTLS version, see <seealso + marker="#connection_information-1">ssl:connection_information/1 + </seealso>.</item> + <tag><c>available</c></tag> - <item>All TLS/SSL versions supported by the SSL application. + <item>All SSL/TLS versions supported by the SSL application. TLS 1.2 requires sufficient support from the Crypto application.</item> + + <tag><c>available_dtls</c></tag> + <item>All DTLS versions supported by the SSL application. + DTLS 1.2 requires sufficient support from the Crypto + application.</item> + </taglist> </desc> </func> @@ -1438,6 +1465,7 @@ fun(srp, Username :: string(), UserState :: term()) -> <title>SEE ALSO</title> <p><seealso marker="kernel:inet">inet(3)</seealso> and <seealso marker="kernel:gen_tcp">gen_tcp(3)</seealso> + <seealso marker="kernel:gen_udp">gen_udp(3)</seealso> </p> </section> |