mirror of https://github.com/openssl/openssl.git
72 lines
2.4 KiB
Plaintext
72 lines
2.4 KiB
Plaintext
=pod
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=head1 NAME
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SSL_get_current_cipher, SSL_get_cipher_name, SSL_get_cipher,
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SSL_get_cipher_bits, SSL_get_cipher_version,
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SSL_get_pending_cipher - get SSL_CIPHER of a connection
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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SSL_CIPHER *SSL_get_current_cipher(const SSL *ssl);
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SSL_CIPHER *SSL_get_pending_cipher(const SSL *ssl);
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const char *SSL_get_cipher_name(const SSL *s);
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const char *SSL_get_cipher(const SSL *s);
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int SSL_get_cipher_bits(const SSL *s, int *np);
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const char *SSL_get_cipher_version(const SSL *s);
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=head1 DESCRIPTION
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SSL_get_current_cipher() returns a pointer to an SSL_CIPHER object containing
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the description of the actually used cipher of a connection established with
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the B<ssl> object.
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See L<SSL_CIPHER_get_name(3)> for more details.
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SSL_get_cipher_name() obtains the
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name of the currently used cipher.
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SSL_get_cipher() is identical to SSL_get_cipher_name().
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SSL_get_cipher_bits() is a
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macro to obtain the number of secret/algorithm bits used and
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SSL_get_cipher_version() returns the protocol name.
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SSL_get_pending_cipher() returns a pointer to an SSL_CIPHER object containing
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the description of the cipher (if any) that has been negotiated for future use
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on the connection established with the B<ssl> object, but is not yet in use.
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This may be the case during handshake processing, when control flow can be
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returned to the application via any of several callback methods. The internal
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sequencing of handshake processing and callback invocation is not guaranteed
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to be stable from release to release, and at present only the callback set
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by SSL_CTX_set_alpn_select_cb() is guaranteed to have a non-NULL return value.
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Other callbacks may be added to this list over time.
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=head1 RETURN VALUES
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SSL_get_current_cipher() returns the cipher actually used, or NULL if
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no session has been established.
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SSL_get_pending_cipher() returns the cipher to be used at the next change
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of cipher suite, or NULL if no such cipher is known.
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=head1 NOTES
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SSL_get_cipher, SSL_get_cipher_bits, SSL_get_cipher_version, and
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SSL_get_cipher_name are implemented as macros.
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=head1 SEE ALSO
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L<ssl(7)>, L<SSL_CIPHER_get_name(3)>
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=head1 COPYRIGHT
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Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
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Licensed under the Apache License 2.0 (the "License"). You may not use
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this file except in compliance with the License. You can obtain a copy
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in the file LICENSE in the source distribution or at
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L<https://www.openssl.org/source/license.html>.
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=cut
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