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Diffstat (limited to 'secure/lib/libssl/man/SSL_CTX_set_cipher_list.3')
| -rw-r--r-- | secure/lib/libssl/man/SSL_CTX_set_cipher_list.3 | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/secure/lib/libssl/man/SSL_CTX_set_cipher_list.3 b/secure/lib/libssl/man/SSL_CTX_set_cipher_list.3 new file mode 100644 index 0000000..3a711f5 --- /dev/null +++ b/secure/lib/libssl/man/SSL_CTX_set_cipher_list.3 @@ -0,0 +1,206 @@ +.\" Automatically generated by Pod::Man 2.28 (Pod::Simple 3.28) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +SSL_CTX_set_cipher_list, SSL_set_cipher_list \- choose list of available SSL_CIPHERs +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/ssl.h> +\& +\& int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str); +\& int SSL_set_cipher_list(SSL *ssl, const char *str); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +\&\fISSL_CTX_set_cipher_list()\fR sets the list of available ciphers for \fBctx\fR +using the control string \fBstr\fR. The format of the string is described +in \fIciphers\fR\|(1). The list of ciphers is inherited by all +\&\fBssl\fR objects created from \fBctx\fR. +.PP +\&\fISSL_set_cipher_list()\fR sets the list of ciphers only for \fBssl\fR. +.SH "NOTES" +.IX Header "NOTES" +The control string \fBstr\fR should be universally usable and not depend +on details of the library configuration (ciphers compiled in). Thus no +syntax checking takes place. Items that are not recognized, because the +corresponding ciphers are not compiled in or because they are mistyped, +are simply ignored. Failure is only flagged if no ciphers could be collected +at all. +.PP +It should be noted, that inclusion of a cipher to be used into the list is +a necessary condition. On the client side, the inclusion into the list is +also sufficient. On the server side, additional restrictions apply. All ciphers +have additional requirements. \s-1ADH\s0 ciphers don't need a certificate, but +DH-parameters must have been set. All other ciphers need a corresponding +certificate and key. +.PP +A \s-1RSA\s0 cipher can only be chosen, when a \s-1RSA\s0 certificate is available. +\&\s-1RSA\s0 export ciphers with a keylength of 512 bits for the \s-1RSA\s0 key require +a temporary 512 bit \s-1RSA\s0 key, as typically the supplied key has a length +of 1024 bit (see +\&\fISSL_CTX_set_tmp_rsa_callback\fR\|(3)). +\&\s-1RSA\s0 ciphers using \s-1DHE\s0 need a certificate and key and additional DH-parameters +(see \fISSL_CTX_set_tmp_dh_callback\fR\|(3)). +.PP +A \s-1DSA\s0 cipher can only be chosen, when a \s-1DSA\s0 certificate is available. +\&\s-1DSA\s0 ciphers always use \s-1DH\s0 key exchange and therefore need DH-parameters +(see \fISSL_CTX_set_tmp_dh_callback\fR\|(3)). +.PP +When these conditions are not met for any cipher in the list (e.g. a +client only supports export \s-1RSA\s0 ciphers with a asymmetric key length +of 512 bits and the server is not configured to use temporary \s-1RSA\s0 +keys), the \*(L"no shared cipher\*(R" (\s-1SSL_R_NO_SHARED_CIPHER\s0) error is generated +and the handshake will fail. +.PP +If the cipher list does not contain any SSLv2 cipher suites (this is the +default) then SSLv2 is effectively disabled and neither clients nor servers +will attempt to use SSLv2. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +\&\fISSL_CTX_set_cipher_list()\fR and \fISSL_set_cipher_list()\fR return 1 if any cipher +could be selected and 0 on complete failure. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fIssl\fR\|(3), \fISSL_get_ciphers\fR\|(3), +\&\fISSL_CTX_use_certificate\fR\|(3), +\&\fISSL_CTX_set_tmp_rsa_callback\fR\|(3), +\&\fISSL_CTX_set_tmp_dh_callback\fR\|(3), +\&\fIciphers\fR\|(1) |
