.\" $OpenBSD: SSL_get_ciphers.3,v 1.6 2018/03/27 17:35:50 schwarze Exp $
.\" full merge up to: OpenSSL c3e64028 Mar 30 11:50:14 2005 +0000
.\" selective merge up to: OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100
.\"
.\" This file was written by Lutz Jaenicke <jaenicke@openssl.org>,
.\" Nick Mathewson <nickm@torproject.org>, and Kazuki Yamaguchi <k@rhe.jp>.
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.Dd $Mdocdate: March 27 2018 $
.Dt SSL_GET_CIPHERS 3
.Os
.Sh NAME
.Nm SSL_get_ciphers ,
.Nm SSL_CTX_get_ciphers ,
.Nm SSL_get_cipher_list
.Nd get list of available SSL_CIPHERs
.Sh SYNOPSIS
.In openssl/ssl.h
.Ft STACK_OF(SSL_CIPHER) *
.Fn SSL_get_ciphers "const SSL *ssl"
.Ft STACK_OF(SSL_CIPHER) *
.Fn SSL_CTX_get_ciphers "const SSL_CTX *ctx"
.Ft const char *
.Fn SSL_get_cipher_list "const SSL *ssl" "int priority"
.Sh DESCRIPTION
.Fn SSL_get_ciphers
returns the stack of available
.Vt SSL_CIPHER Ns s
for
.Fa ssl ,
sorted by preference.
If
.Fa ssl
is
.Dv NULL
or no ciphers are available,
.Dv NULL
is returned.
.Pp
.Fn SSL_CTX_get_ciphers
returns the stack of available
.Vt SSL_CIPHER Ns s
for
.Fa ctx .
.Pp
.Fn SSL_get_ciphers
and
.Fn SSL_CTX_get_ciphers
return pointers to internal cipher stacks, which will be freed
later on when the
.Vt SSL
or
.Vt SSL_CTX
object is freed.
Therefore, the calling code must not free the return value itself.
.Pp
The details of the ciphers obtained by
.Fn SSL_get_ciphers
and
.Fn SSL_CTX_get_ciphers
can be obtained using the
.Xr SSL_CIPHER_get_name 3
family of functions.
.Pp
.Fn SSL_get_cipher_list
returns a pointer to the name of the
.Vt SSL_CIPHER
listed for
.Fa ssl
with
.Fa priority .
If
.Fa ssl
is
.Dv NULL ,
no ciphers are available, or there are fewer ciphers than
.Fa priority
available,
.Dv NULL
is returned.
.Pp
Call
.Fn SSL_get_cipher_list
with
.Fa priority
starting from 0 to obtain the sorted list of available ciphers, until
.Dv NULL
is returned.
.Sh SEE ALSO
.Xr ssl 3 ,
.Xr SSL_CIPHER_get_name 3 ,
.Xr SSL_CTX_set_cipher_list 3
.Sh HISTORY
.Fn SSL_get_cipher_list
first appeared in SSLeay 0.5.2.
.Fn SSL_get_ciphers
first appeared in SSLeay 0.8.0.
Both functions have been available since
.Ox 2.4 .
.Pp
.Fn SSL_CTX_get_ciphers
first appeared in OpenSSL 1.1.0 and has been available since
.Ox 6.3 .