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.\" ========================================================================
.\"
.IX Title "SSL_get_ciphers 3"
.TH SSL_get_ciphers 3 "2019-12-20" "1.0.2u" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
SSL_get_ciphers,
SSL_get_cipher_list,
SSL_get_shared_ciphers
\&\- get list of available SSL_CIPHERs
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *ssl);
\& const char *SSL_get_cipher_list(const SSL *ssl, int priority);
\& char *SSL_get_shared_ciphers(const SSL *s, char *buf, int size);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBSSL_get_ciphers()\fR returns the stack of available SSL_CIPHERs for \fBssl\fR,
sorted by preference. If \fBssl\fR is \s-1NULL\s0 or no ciphers are available, \s-1NULL\s0
is returned.
.PP
\&\fBSSL_get_cipher_list()\fR returns a pointer to the name of the \s-1SSL_CIPHER\s0
listed for \fBssl\fR with \fBpriority\fR. If \fBssl\fR is \s-1NULL,\s0 no ciphers are
available, or there are less ciphers than \fBpriority\fR available, \s-1NULL\s0
is returned.
.PP
\&\fBSSL_get_shared_ciphers()\fR creates a colon separated and \s-1NUL\s0 terminated list of
\&\s-1SSL_CIPHER\s0 names that are available in both the client and the server. \fBbuf\fR is
the buffer that should be populated with the list of names and \fBsize\fR is the
size of that buffer. A pointer to \fBbuf\fR is returned on success or \s-1NULL\s0 on
error. If the supplied buffer is not large enough to contain the complete list
of names then a truncated list of names will be returned. Note that just because
a ciphersuite is available (i.e. it is configured in the cipher list) and shared
by both the client and the server it does not mean that it is enabled (for
example some ciphers may not be usable by a server if there is not a suitable
certificate configured). This function will return available shared ciphersuites
whether or not they are enabled. This is a server side function only and must
only be called after the completion of the initial handshake.
.SH "NOTES"
.IX Header "NOTES"
The details of the ciphers obtained by \fBSSL_get_ciphers()\fR can be obtained using
the \fBSSL_CIPHER_get_name\fR\|(3) family of functions.
.PP
Call \fBSSL_get_cipher_list()\fR with \fBpriority\fR starting from 0 to obtain the
sorted list of available ciphers, until \s-1NULL\s0 is returned.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
See \s-1DESCRIPTION\s0
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBssl\fR\|(3), \fBSSL_CTX_set_cipher_list\fR\|(3),
\&\fBSSL_CIPHER_get_name\fR\|(3)