| Current File : //usr/local/share/man/man3/SSL_get_client_ciphers.3 |
.\" Automatically generated by Pod::Man 2.27 (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++. Capital omega is used to do unbreakable dashes and
.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
. ds -- \(*W-
. ds PI pi
. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
. ds L" ""
. ds R" ""
. ds C` ""
. ds C' ""
'br\}
.el\{\
. ds -- \|\(em\|
. ds PI \(*p
. ds L" ``
. ds R" ''
. ds C`
. ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\"
.\" If the F register is turned on, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD. Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{
. if \nF \{
. de IX
. tm Index:\\$1\t\\n%\t"\\$2"
..
. if !\nF==2 \{
. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff
.if n \{\
. ds #H 0
. ds #V .8m
. ds #F .3m
. ds #[ \f1
. ds #] \fP
.\}
.if t \{\
. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
. ds #V .6m
. ds #F 0
. ds #[ \&
. ds #] \&
.\}
. \" simple accents for nroff and troff
.if n \{\
. ds ' \&
. ds ` \&
. ds ^ \&
. ds , \&
. ds ~ ~
. ds /
.\}
.if t \{\
. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
. \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
. \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
. ds : e
. ds 8 ss
. ds o a
. ds d- d\h'-1'\(ga
. ds D- D\h'-1'\(hy
. ds th \o'bp'
. ds Th \o'LP'
. ds ae ae
. ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "SSL_GET_CIPHERS 3"
.TH SSL_GET_CIPHERS 3 "2017-05-25" "1.1.0f" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
SSL_get1_supported_ciphers, SSL_get_client_ciphers,
SSL_get_ciphers, SSL_CTX_get_ciphers, SSL_get_cipher_list
\&\- 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);
\& STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx);
\& STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s);
\& STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *ssl);
\& const char *SSL_get_cipher_list(const SSL *ssl, int priority);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fISSL_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
\&\fISSL_CTX_get_ciphers()\fR returns the stack of available SSL_CIPHERs for \fBctx\fR.
.PP
\&\fISSL_get1_supported_ciphers()\fR returns the stack of enabled SSL_CIPHERs for
\&\fBssl\fR, sorted by preference.
The list depends on settings like the cipher list, the supported protocol
versions, the security level, and the enabled signature algorithms.
\&\s-1SRP\s0 and \s-1PSK\s0 ciphers are only enabled if the appropriate callbacks or settings
have been applied.
This is the list that will be sent by the client to the server.
The list supported by the server might include more ciphers in case there is a
hole in the list of supported protocols.
The server will also not use ciphers from this list depending on the
configured certificates and \s-1DH\s0 parameters.
If \fBssl\fR is \s-1NULL\s0 or no ciphers are available, \s-1NULL\s0 is returned.
.PP
\&\fISSL_get_client_ciphers()\fR returns the stack of available SSL_CIPHERs matching the
list received from the client on \fBssl\fR. If \fBssl\fR is \s-1NULL,\s0 no ciphers are
available, or \fBssl\fR is not operating in server mode, \s-1NULL\s0 is returned.
.PP
\&\fISSL_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.
.SH "NOTES"
.IX Header "NOTES"
The details of the ciphers obtained by \fISSL_get_ciphers()\fR, \fISSL_CTX_get_ciphers()\fR
\&\fISSL_get1_supported_ciphers()\fR and \fISSL_get_client_ciphers()\fR can be obtained using
the \fISSL_CIPHER_get_name\fR\|(3) family of functions.
.PP
Call \fISSL_get_cipher_list()\fR with \fBpriority\fR starting from 0 to obtain the
sorted list of available ciphers, until \s-1NULL\s0 is returned.
.PP
Note: \fISSL_get_ciphers()\fR, \fISSL_CTX_get_ciphers()\fR and \fISSL_get_client_ciphers()\fR
return a pointer to an internal cipher stack, which will be freed later on when
the \s-1SSL\s0 or \s-1SSL_SESSION\s0 object is freed. Therefore, the calling code \fB\s-1MUST NOT\s0\fR
free the return value itself.
.PP
The stack returned by \fISSL_get1_supported_ciphers()\fR should be freed using
\&\fIsk_SSL_CIPHER_free()\fR.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
See \s-1DESCRIPTION\s0
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIssl\fR\|(3), \fISSL_CTX_set_cipher_list\fR\|(3),
\&\fISSL_CIPHER_get_name\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2000\-2016 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.