diff options
Diffstat (limited to 'doc/ssl/SSL_CONF_cmd.pod')
| -rw-r--r-- | doc/ssl/SSL_CONF_cmd.pod | 33 |
1 files changed, 17 insertions, 16 deletions
diff --git a/doc/ssl/SSL_CONF_cmd.pod b/doc/ssl/SSL_CONF_cmd.pod index 2bf1a60e9013..e81d76ae779a 100644 --- a/doc/ssl/SSL_CONF_cmd.pod +++ b/doc/ssl/SSL_CONF_cmd.pod @@ -74,7 +74,7 @@ B<prime256v1>). Curve names are case sensitive. =item B<-named_curve> -This sets the temporary curve used for ephemeral ECDH modes. Only used by +This sets the temporary curve used for ephemeral ECDH modes. Only used by servers The B<value> argument is a curve name or the special value B<auto> which @@ -85,7 +85,7 @@ can be either the B<NIST> name (e.g. B<P-256>) or an OpenSSL OID name =item B<-cipher> Sets the cipher suite list to B<value>. Note: syntax checking of B<value> is -currently not performed unless a B<SSL> or B<SSL_CTX> structure is +currently not performed unless a B<SSL> or B<SSL_CTX> structure is associated with B<cctx>. =item B<-cert> @@ -111,9 +111,9 @@ operations are permitted. =item B<-no_ssl2>, B<-no_ssl3>, B<-no_tls1>, B<-no_tls1_1>, B<-no_tls1_2> -Disables protocol support for SSLv2, SSLv3, TLS 1.0, TLS 1.1 or TLS 1.2 -by setting the corresponding options B<SSL_OP_NO_SSL2>, B<SSL_OP_NO_SSL3>, -B<SSL_OP_NO_TLS1>, B<SSL_OP_NO_TLS1_1> and B<SSL_OP_NO_TLS1_2> respectively. +Disables protocol support for SSLv2, SSLv3, TLSv1.0, TLSv1.1 or TLSv1.2 +by setting the corresponding options B<SSL_OP_NO_SSLv2>, B<SSL_OP_NO_SSLv3>, +B<SSL_OP_NO_TLSv1>, B<SSL_OP_NO_TLSv1_1> and B<SSL_OP_NO_TLSv1_2> respectively. =item B<-bugs> @@ -177,7 +177,7 @@ Note: the command prefix (if set) alters the recognised B<cmd> values. =item B<CipherString> Sets the cipher suite list to B<value>. Note: syntax checking of B<value> is -currently not performed unless an B<SSL> or B<SSL_CTX> structure is +currently not performed unless an B<SSL> or B<SSL_CTX> structure is associated with B<cctx>. =item B<Certificate> @@ -244,7 +244,7 @@ B<prime256v1>). Curve names are case sensitive. =item B<ECDHParameters> -This sets the temporary curve used for ephemeral ECDH modes. Only used by +This sets the temporary curve used for ephemeral ECDH modes. Only used by servers The B<value> argument is a curve name or the special value B<Automatic> which @@ -258,10 +258,11 @@ The supported versions of the SSL or TLS protocol. The B<value> argument is a comma separated list of supported protocols to enable or disable. If an protocol is preceded by B<-> that version is disabled. -All versions are enabled by default, though applications may choose to -explicitly disable some. Currently supported protocol values are B<SSLv2>, -B<SSLv3>, B<TLSv1>, B<TLSv1.1> and B<TLSv1.2>. The special value B<ALL> refers -to all supported versions. +Currently supported protocol values are B<SSLv2>, B<SSLv3>, B<TLSv1>, +B<TLSv1.1> and B<TLSv1.2>. +All protocol versions other than B<SSLv2> are enabled by default. +To avoid inadvertent enabling of B<SSLv2>, when SSLv2 is disabled, it is not +possible to enable it via the B<Protocol> command. =item B<Options> @@ -339,16 +340,16 @@ The value is a directory name. The order of operations is significant. This can be used to set either defaults or values which cannot be overridden. For example if an application calls: - SSL_CONF_cmd(ctx, "Protocol", "-SSLv2"); + SSL_CONF_cmd(ctx, "Protocol", "-SSLv3"); SSL_CONF_cmd(ctx, userparam, uservalue); -it will disable SSLv2 support by default but the user can override it. If +it will disable SSLv3 support by default but the user can override it. If however the call sequence is: SSL_CONF_cmd(ctx, userparam, uservalue); - SSL_CONF_cmd(ctx, "Protocol", "-SSLv2"); + SSL_CONF_cmd(ctx, "Protocol", "-SSLv3"); -SSLv2 is B<always> disabled and attempt to override this by the user are +then SSLv3 is B<always> disabled and attempt to override this by the user are ignored. By checking the return code of SSL_CTX_cmd() it is possible to query if a @@ -372,7 +373,7 @@ can be checked instead. If -3 is returned a required argument is missing and an error is indicated. If 0 is returned some other error occurred and this can be reported back to the user. -The function SSL_CONF_cmd_value_type() can be used by applications to +The function SSL_CONF_cmd_value_type() can be used by applications to check for the existence of a command or to perform additional syntax checking or translation of the command value. For example if the return value is B<SSL_CONF_TYPE_FILE> an application could translate a relative |