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Add SSL_get_client_ciphers() to return ciphers from ClientHello

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On the server side, if you want to know which ciphers the client
offered, you had to use session->ciphers.  But that field is no
longer visible, so we need a method to get at it.

Signed-off-by: Nick Mathewson <nickm@torproject.org>
Signed-off-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
This commit is contained in:
Nick Mathewson 2015-05-25 21:16:53 -04:00 committed by Matt Caswell
parent 15a06488fc
commit 831eef2cf5
3 changed files with 13 additions and 0 deletions
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5
doc/ssl/SSL_get_ciphers.pod
View file

@ -9,6 +9,7 @@ SSL_get_ciphers, SSL_get_cipher_list - get list of available SSL_CIPHERs
#include <openssl/ssl.h>
STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *ssl);
STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *ssl);
const char *SSL_get_cipher_list(const SSL *ssl, int priority);
=head1 DESCRIPTION
@ -17,6 +18,10 @@ SSL_get_ciphers() returns the stack of available SSL_CIPHERs for B<ssl>,
sorted by preference. 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
list sent by the client for B<ssl>. If B<ssl> is NULL, no ciphers are
available, or B<ssl> is not operating in server mode, NULL is returned.
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

1
include/openssl/ssl.h
View file

@ -1583,6 +1583,7 @@ __owur const SSL_METHOD *DTLS_server_method(void); /* DTLS 1.0 and 1.2 */
__owur const SSL_METHOD *DTLS_client_method(void); /* DTLS 1.0 and 1.2 */
__owur STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s);
__owur STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s);
__owur STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s);
__owur int SSL_do_handshake(SSL *s);

7
ssl/ssl_lib.c
View file

@ -1258,6 +1258,13 @@ STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)
return (NULL);
}
STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s)
{
if ((s == NULL) || (s->session == NULL) || !s->server)
return NULL;
return s->session->ciphers;
}
STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s)
{
STACK_OF(SSL_CIPHER) *sk = NULL, *ciphers;