=head1 NAME
-SSL_get1_supported_ciphers, SSL_get_client_ciphers,
-SSL_get_ciphers, SSL_CTX_get_ciphers,
-SSL_bytes_to_cipher_list, SSL_get_cipher_list
+SSL_get1_supported_ciphers,
+SSL_get_client_ciphers,
+SSL_get_ciphers,
+SSL_CTX_get_ciphers,
+SSL_bytes_to_cipher_list,
+SSL_get_cipher_list,
+SSL_get_shared_ciphers
- get list of available SSL_CIPHERs
=head1 SYNOPSIS
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);
- STACK_OF(SSL_CIPHER) *SSL_bytes_to_cipher_list(SSL *s,
- const unsigned char *bytes,
- size_t len, int isv2format)
+ int SSL_bytes_to_cipher_list(SSL *s, const unsigned char *bytes, size_t len,
+ int isv2format, STACK_OF(SSL_CIPHER) **sk,
+ STACK_OF(SSL_CIPHER) **scsvs);
const char *SSL_get_cipher_list(const SSL *ssl, int priority);
+ char *SSL_get_shared_ciphers(const SSL *s, char *buf, int size);
=head1 DESCRIPTION
SSL_CTX_get_ciphers() returns the stack of available SSL_CIPHERs for B<ctx>.
SSL_get1_supported_ciphers() returns the stack of enabled SSL_CIPHERs for
-B<ssl>, sorted by preference.
+B<ssl> 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.
SRP and PSK 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 DH parameters.
+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 B<ssl> is NULL or no ciphers are available, NULL is returned.
SSL_get_client_ciphers() returns the stack of available SSL_CIPHERs matching the
as a wire-protocol cipher suite specification (in the three-octet-per-cipher
SSLv2 wire format if B<isv2format> is nonzero; otherwise the two-octet
SSLv3/TLS wire format), and parses the cipher suites supported by the library
-into the returned stack of SSL_CIPHER objects. Unsupported cipher suites
-are ignored, and NULL is returned on error.
+into the returned stacks of SSL_CIPHER objects sk and Signalling Cipher-Suite
+Values scsvs. Unsupported cipher suites are ignored. Returns 1 on success
+and 0 on failure.
SSL_get_cipher_list() returns a pointer to the name of the SSL_CIPHER
listed for B<ssl> with B<priority>. If B<ssl> is NULL, no ciphers are
available, or there are less ciphers than B<priority> available, NULL
is returned.
+SSL_get_shared_ciphers() creates a colon separated and NUL terminated list of
+SSL_CIPHER names that are available in both the client and the server. B<buf> is
+the buffer that should be populated with the list of names and B<size> is the
+size of that buffer. A pointer to B<buf> is returned on success or NULL 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.
+
=head1 NOTES
The details of the ciphers obtained by SSL_get_ciphers(), SSL_CTX_get_ciphers()
The stack returned by SSL_get1_supported_ciphers() should be freed using
sk_SSL_CIPHER_free().
-The stack returned by SSL_bytes_to_cipher_list() should be freed using
+The stacks returned by SSL_bytes_to_cipher_list() should be freed using
sk_SSL_CIPHER_free().
=head1 RETURN VALUES
See DESCRIPTION
-=head1 BUGS
-
-The implementation of SSL_bytes_to_cipher_list() mutates state in the
-supplied SSL object B<s>; SSL_bytes_to_cipher_list() should not be called
-on a server SSL object after that server has processed the received ClientHello.
-
=head1 SEE ALSO
L<ssl(7)>, L<SSL_CTX_set_cipher_list(3)>,
=head1 COPYRIGHT
-Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
-Licensed under the OpenSSL license (the "License"). You may not use
+Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
L<https://www.openssl.org/source/license.html>.
projects / openssl.git / blobdiff