SSL_CTX_set_cipher_list.pod revision 68651 
1=pod
2
3=head1 NAME
4
5SSL_CTX_set_cipher_list, SSL_set_cipher_list 
6- choose list of available SSL_CIPHERs
7
8=head1 SYNOPSIS
9
10 #include <openssl/ssl.h>
11
12 int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str);
13 int SSL_set_cipher_list(SSL *ssl, const char *str);
14
15=head1 DESCRIPTION
16
17SSL_CTX_set_cipher_list() sets the list of available ciphers for B<ctx>
18using the control string B<str>. The format of the string is described
19in L<ciphers(1)|ciphers(1)>. The list of ciphers is inherited by all
20B<ssl> objects created from B<ctx>.
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22SSL_set_cipher_list() sets the list of ciphers only for B<ssl>.
23
24=head1 NOTES
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26The control string B<str> should be universally usable and not depend
27on details of the library configuration (ciphers compiled in). Thus no
28syntax checking takes place. Items that are not recognized, because the
29corresponding ciphers are not compiled in or because they are mistyped,
30are simply ignored. Failure is only flagged if no ciphers could be collected
31at all.
32
33It should be noted, that inclusion of a cipher to be used into the list is
34a necessary condition. On the client side, the inclusion into the list is
35also sufficient. On the server side, additional restrictions apply. All ciphers
36have additional requirements. ADH ciphers don't need a certificate, but
37DH-parameters must have been set. All other ciphers need a corresponding
38certificate and key. A RSA cipher can only be chosen, when a RSA certificate is
39available, the respective is valid for DSA ciphers. Ciphers using EDH need
40a certificate and key and DH-parameters.
41
42=head1 RETURN VALUES
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44SSL_CTX_set_cipher_list() and SSL_set_cipher_list() return 1 if any cipher
45could be selected and 0 on complete failure.
46
47=head1 SEE ALSO
48
49L<ssl(3)|ssl(3)>, L<SSL_get_ciphers(3)|SSL_get_ciphers(3)>,
50L<ciphers(1)|ciphers(1)>
51
52=cut
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