diff options
Diffstat (limited to 'openssl-1.1.0h/doc/ssl/SSL_get_ciphers.pod')
| -rw-r--r-- | openssl-1.1.0h/doc/ssl/SSL_get_ciphers.pod | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/openssl-1.1.0h/doc/ssl/SSL_get_ciphers.pod b/openssl-1.1.0h/doc/ssl/SSL_get_ciphers.pod new file mode 100644 index 0000000..cc55095 --- /dev/null +++ b/openssl-1.1.0h/doc/ssl/SSL_get_ciphers.pod @@ -0,0 +1,84 @@ +=pod + +=head1 NAME + +SSL_get1_supported_ciphers, SSL_get_client_ciphers, +SSL_get_ciphers, SSL_CTX_get_ciphers, SSL_get_cipher_list +- get list of available SSL_CIPHERs + +=head1 SYNOPSIS + + #include <openssl/ssl.h> + + STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *ssl); + 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); + const char *SSL_get_cipher_list(const SSL *ssl, int priority); + +=head1 DESCRIPTION + +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_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. +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. +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 received from the client on 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 +is returned. + +=head1 NOTES + +The details of the ciphers obtained by SSL_get_ciphers(), SSL_CTX_get_ciphers() +SSL_get1_supported_ciphers() and SSL_get_client_ciphers() can be obtained using +the L<SSL_CIPHER_get_name(3)> family of functions. + +Call SSL_get_cipher_list() with B<priority> starting from 0 to obtain the +sorted list of available ciphers, until NULL 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 SSL or SSL_SESSION object is freed. Therefore, the calling code B<MUST NOT> +free the return value itself. + +The stack returned by SSL_get1_supported_ciphers() should be freed using +sk_SSL_CIPHER_free(). + +=head1 RETURN VALUES + +See DESCRIPTION + +=head1 SEE ALSO + +L<ssl(3)>, L<SSL_CTX_set_cipher_list(3)>, +L<SSL_CIPHER_get_name(3)> + +=head1 COPYRIGHT + +Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. + +Licensed under the OpenSSL license (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>. + +=cut |