.\"	$OpenBSD: SSL_get_current_cipher.3,v 1.4 2018/03/27 17:35:50 schwarze Exp $
.\"	OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100
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.Dd $Mdocdate: March 27 2018 $
.Dt SSL_GET_CURRENT_CIPHER 3
.Os
.Sh NAME
.Nm SSL_get_current_cipher ,
.Nm SSL_get_cipher ,
.Nm SSL_get_cipher_name ,
.Nm  SSL_get_cipher_bits ,
.Nm SSL_get_cipher_version
.Nd get SSL_CIPHER of a connection
.Sh SYNOPSIS
.In openssl/ssl.h
.Ft const SSL_CIPHER *
.Fn SSL_get_current_cipher "const SSL *ssl"
.Ft const char *
.Fn SSL_get_cipher "const SSL *ssl"
.Ft const char *
.Fn SSL_get_cipher_name "const SSL *ssl"
.Ft int
.Fn SSL_get_cipher_bits "const SSL *ssl" "int *np"
.Ft char *
.Fn SSL_get_cipher_version "const SSL *ssl"
.Sh DESCRIPTION
.Fn SSL_get_current_cipher
returns a pointer to an
.Vt SSL_CIPHER
object containing the description of the actually used cipher of a connection
established with the
.Fa ssl
object.
See
.Xr SSL_CIPHER_get_name 3
for more details.
.Pp
.Fn SSL_get_cipher_name
obtains the name of the currently used cipher.
.Fn SSL_get_cipher
is identical to
.Fn SSL_get_cipher_name .
.Pp
.Fn SSL_get_cipher_bits
obtains the number of secret/algorithm bits used and
.Fn SSL_get_cipher_version
returns the protocol name.
.Pp
.Fn SSL_get_cipher ,
.Fn SSL_get_cipher_name ,
.Fn SSL_get_cipher_bits ,
and
.Fn SSL_get_cipher_version
are implemented as macros.
.Sh RETURN VALUES
.Fn SSL_get_current_cipher
returns the cipher actually used, or
.Dv NULL
if no session has been established.
.Sh SEE ALSO
.Xr ssl 3 ,
.Xr SSL_CIPHER_get_name 3
.Sh HISTORY
.Fn SSL_get_cipher
appeared in SSLeay 0.4 or earlier.
.Fn SSL_get_cipher_bits
first appeared in SSLeay 0.6.4.
.Fn SSL_get_cipher_name
and
.Fn SSL_get_cipher_version
first appeared in SSLeay 0.8.0.
.Fn SSL_get_current_cipher
first appeared in SSLeay 0.8.1.
These functions have been available since
.Ox 2.4 .