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therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
nothing in troff, for use with C<>.
.tr \(*W- . 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\} . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' . ds C` . ds C' 'br\}
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.. .nr rF 0 . if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{\ . nr % 0 . nr F 2 . \} . \} .\} .rr rF Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] .\} . ds #H ((1u-(\\\\n(.fu%2u))*.13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} . 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 . \" corrections for vroff . \" for low resolution devices (crt and lpr) \{\ . 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 .\} ========================================================================
Title "SSL_GET_CIPHERS 3ossl"
way too many mistakes in technical documents.
\fBSSL_CTX_get_ciphers() returns the stack of available SSL_CIPHERs for ctx.
\fBSSL_get1_supported_ciphers() returns the stack of enabled SSL_CIPHERs for \fBssl as would be sent in a ClientHello (that is, 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. The list of ciphers that would be sent in a ClientHello can differ from the list of ciphers that would be acceptable when acting as a server. For example, additional ciphers may be usable by a server if there is a gap in the list of supported protocols, and some ciphers may not be usable by a server if there is not a suitable certificate configured. If ssl is \s-1NULL\s0 or no ciphers are available, \s-1NULL\s0 is returned.
\fBSSL_get_client_ciphers() returns the stack of available SSL_CIPHERs matching the list received from the client on ssl. If ssl is \s-1NULL,\s0 no ciphers are available, or ssl is not operating in server mode, \s-1NULL\s0 is returned.
\fBSSL_bytes_to_cipher_list() treats the supplied len octets in bytes as a wire-protocol cipher suite specification (in the three-octet-per-cipher SSLv2 wire format if isv2format is nonzero; otherwise the two-octet SSLv3/TLS wire format), and parses the cipher suites supported by the library into the returned stacks of \s-1SSL_CIPHER\s0 objects sk and Signalling Cipher-Suite Values scsvs. Unsupported cipher suites are ignored. Returns 1 on success and 0 on failure.
\fBSSL_get_cipher_list() returns a pointer to the name of the \s-1SSL_CIPHER\s0 listed for ssl with priority. If ssl is \s-1NULL,\s0 no ciphers are available, or there are less ciphers than priority available, \s-1NULL\s0 is returned.
\fBSSL_get_shared_ciphers() 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. buf is the buffer that should be populated with the list of names and size is the size of that buffer. A pointer to buf 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 (see the description of SSL_get1_supported_ciphers() above). 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.
Call SSL_get_cipher_list() with priority starting from 0 to obtain the sorted list of available ciphers, until \s-1NULL\s0 is returned.
Note: SSL_get_ciphers(), SSL_CTX_get_ciphers() and SSL_get_client_ciphers() 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 \s-1MUST NOT\s0 free the return value itself.
The stack returned by SSL_get1_supported_ciphers() should be freed using \fBsk_SSL_CIPHER_free().
The stacks returned by SSL_bytes_to_cipher_list() should be freed using \fBsk_SSL_CIPHER_free().
Licensed under the Apache License 2.0 (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>.