Current File : //proc/thread-self/root/opt/alt/openssl/share/man/man3/SSL_CIPHER_description.3ssl
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35)
.\"
.\" 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 >0, 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_CIPHER_get_name 3"
.TH SSL_CIPHER_get_name 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.
.if n .ad l
.nh
.SH "NAME"
SSL_CIPHER_get_name, SSL_CIPHER_get_bits, SSL_CIPHER_get_version, SSL_CIPHER_description \- get SSL_CIPHER properties
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
\&
\& const char *SSL_CIPHER_get_name(const SSL_CIPHER *cipher);
\& int SSL_CIPHER_get_bits(const SSL_CIPHER *cipher, int *alg_bits);
\& char *SSL_CIPHER_get_version(const SSL_CIPHER *cipher);
\& char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int size);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fBSSL_CIPHER_get_name()\fR returns a pointer to the name of \fBcipher\fR. If the
argument is the \s-1NULL\s0 pointer, a pointer to the constant value \*(L"\s-1NONE\*(R"\s0 is
returned.
.PP
\&\fBSSL_CIPHER_get_bits()\fR returns the number of secret bits used for \fBcipher\fR. If
\&\fBalg_bits\fR is not \s-1NULL,\s0 it contains the number of bits processed by the
chosen algorithm. If \fBcipher\fR is \s-1NULL, 0\s0 is returned.
.PP
\&\fBSSL_CIPHER_get_version()\fR returns string which indicates the \s-1SSL/TLS\s0 protocol
version that first defined the cipher.
This is currently \fBSSLv2\fR or \fBTLSv1/SSLv3\fR.
In some cases it should possibly return \*(L"TLSv1.2\*(R" but does not;
use \fBSSL_CIPHER_description()\fR instead.
If \fBcipher\fR is \s-1NULL, \*(L"\s0(\s-1NONE\s0)\*(R" is returned.
.PP
\&\fBSSL_CIPHER_description()\fR returns a textual description of the cipher used
into the buffer \fBbuf\fR of length \fBlen\fR provided. \fBlen\fR must be at least
128 bytes, otherwise a pointer to the string \*(L"Buffer too small\*(R" is
returned. If \fBbuf\fR is \s-1NULL,\s0 a buffer of 128 bytes is allocated using
\&\fBOPENSSL_malloc()\fR. If the allocation fails, a pointer to the string
\&\*(L"OPENSSL_malloc Error\*(R" is returned.
.SH "NOTES"
.IX Header "NOTES"
The number of bits processed can be different from the secret bits. An
export cipher like e.g. \s-1EXP\-RC4\-MD5\s0 has only 40 secret bits. The algorithm
does use the full 128 bits (which would be returned for \fBalg_bits\fR), of
which however 88bits are fixed. The search space is hence only 40 bits.
.PP
The string returned by \fBSSL_CIPHER_description()\fR in case of success consists
of cleartext information separated by one or more blanks in the following
sequence:
.IP "<ciphername>" 4
.IX Item "<ciphername>"
Textual representation of the cipher name.
.IP "<protocol version>" 4
.IX Item "<protocol version>"
Protocol version: \fBSSLv2\fR, \fBSSLv3\fR, \fBTLSv1.2\fR. The TLSv1.0 ciphers are
flagged with SSLv3. No new ciphers were added by TLSv1.1.
.IP "Kx=<key exchange>" 4
.IX Item "Kx=<key exchange>"
Key exchange method: \fB\s-1RSA\s0\fR (for export ciphers as \fB\s-1RSA\s0(512)\fR or
\&\fB\s-1RSA\s0(1024)\fR), \fB\s-1DH\s0\fR (for export ciphers as \fB\s-1DH\s0(512)\fR or \fB\s-1DH\s0(1024)\fR),
\&\fB\s-1DH/RSA\s0\fR, \fB\s-1DH/DSS\s0\fR, \fBFortezza\fR.
.IP "Au=<authentication>" 4
.IX Item "Au=<authentication>"
Authentication method: \fB\s-1RSA\s0\fR, \fB\s-1DSS\s0\fR, \fB\s-1DH\s0\fR, \fBNone\fR. None is the
representation of anonymous ciphers.
.IP "Enc=<symmetric encryption method>" 4
.IX Item "Enc=<symmetric encryption method>"
Encryption method with number of secret bits: \fB\s-1DES\s0(40)\fR, \fB\s-1DES\s0(56)\fR,
\&\fB3DES(168)\fR, \fB\s-1RC4\s0(40)\fR, \fB\s-1RC4\s0(56)\fR, \fB\s-1RC4\s0(64)\fR, \fB\s-1RC4\s0(128)\fR,
\&\fB\s-1RC2\s0(40)\fR, \fB\s-1RC2\s0(56)\fR, \fB\s-1RC2\s0(128)\fR, \fB\s-1IDEA\s0(128)\fR, \fBFortezza\fR, \fBNone\fR.
.IP "Mac=<message authentication code>" 4
.IX Item "Mac=<message authentication code>"
Message digest: \fB\s-1MD5\s0\fR, \fB\s-1SHA1\s0\fR.
.IP "<export flag>" 4
.IX Item "<export flag>"
If the cipher is flagged exportable with respect to old \s-1US\s0 crypto
regulations, the word "\fBexport\fR" is printed.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
Some examples for the output of \fBSSL_CIPHER_description()\fR:
.PP
.Vb 4
\& EDH\-RSA\-DES\-CBC3\-SHA SSLv3 Kx=DH Au=RSA Enc=3DES(168) Mac=SHA1
\& EDH\-DSS\-DES\-CBC3\-SHA SSLv3 Kx=DH Au=DSS Enc=3DES(168) Mac=SHA1
\& RC4\-MD5 SSLv3 Kx=RSA Au=RSA Enc=RC4(128) Mac=MD5
\& EXP\-RC4\-MD5 SSLv3 Kx=RSA(512) Au=RSA Enc=RC4(40) Mac=MD5 export
.Ve
.PP
A comp[lete list can be retrieved by invoking the following command:
.PP
.Vb 1
\& openssl ciphers \-v ALL
.Ve
.SH "BUGS"
.IX Header "BUGS"
If \fBSSL_CIPHER_description()\fR is called with \fBcipher\fR being \s-1NULL,\s0 the
library crashes.
.PP
If \fBSSL_CIPHER_description()\fR cannot handle a built-in cipher, the according
description of the cipher property is \fBunknown\fR. This case should not
occur.
.PP
The standard terminology for ephemeral Diffie-Hellman schemes is \s-1DHE\s0
(finite field) or \s-1ECDHE\s0 (elliptic curve). This version of OpenSSL
idiosyncratically reports these schemes as \s-1EDH\s0 and \s-1EECDH,\s0 even though
it also accepts the standard terminology.
.PP
It is recommended to use the standard terminology (\s-1DHE\s0 and \s-1ECDHE\s0)
during configuration (e.g. via SSL_CTX_set_cipher_list) for clarity of
configuration. OpenSSL versions after 1.0.2 will report the standard
terms via SSL_CIPHER_get_name and SSL_CIPHER_description.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
See \s-1DESCRIPTION\s0
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBssl\fR\|(3), \fBSSL_get_current_cipher\fR\|(3),
\&\fBSSL_get_ciphers\fR\|(3), \fBciphers\fR\|(1),
\&\fBSSL_CTX_set_cipher_list\fR\|(3)
Mini Shell