NAME

       SSL_get_current_cipher, SSL_get_cipher_name, SSL_get_cipher, SSL_get_cipher_bits, SSL_get_cipher_version,
       SSL_get_pending_cipher - get SSL_CIPHER of a connection

SYNOPSIS

        #include <openssl/ssl.h>

        const SSL_CIPHER *SSL_get_current_cipher(const SSL *ssl);
        const SSL_CIPHER *SSL_get_pending_cipher(const SSL *ssl);

        const char *SSL_get_cipher_name(const SSL *s);
        const char *SSL_get_cipher(const SSL *s);
        int SSL_get_cipher_bits(const SSL *s, int *np);
        const char *SSL_get_cipher_version(const SSL *s);

DESCRIPTION

       SSL_get_current_cipher() returns a pointer to an SSL_CIPHER object containing the description of the
       actually used cipher of a connection established with the ssl object.  See SSL_CIPHER_get_name(3) for
       more details.

       SSL_get_cipher_name() obtains the name of the currently used cipher.  SSL_get_cipher() is identical to
       SSL_get_cipher_name().  SSL_get_cipher_bits() is a macro to obtain the number of secret/algorithm bits
       used and SSL_get_cipher_version() returns the protocol name.

       SSL_get_pending_cipher() returns a pointer to an SSL_CIPHER object containing the description of the
       cipher (if any) that has been negotiated for future use on the connection established with the ssl
       object, but is not yet in use.  This may be the case during handshake processing, when control flow can
       be returned to the application via any of several callback methods.  The internal sequencing of handshake
       processing and callback invocation is not guaranteed to be stable from release to release, and at present
       only the callback set by SSL_CTX_set_alpn_select_cb() is guaranteed to have a non-NULL return value.
       Other callbacks may be added to this list over time.

RETURN VALUES

       SSL_get_current_cipher() returns the cipher actually used, or NULL if no session has been established.

       SSL_get_pending_cipher() returns the cipher to be used at the next change of cipher suite, or NULL if no
       such cipher is known.

NOTES

       SSL_get_cipher, SSL_get_cipher_bits, SSL_get_cipher_version, and SSL_get_cipher_name are implemented as
       macros.

SEE ALSO

       ssl(7), SSL_CIPHER_get_name(3)

COPYRIGHT

       Copyright 2000-2022 The OpenSSL Project Authors. All Rights Reserved.

       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
       <https://www.openssl.org/source/license.html>.