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Diffstat (limited to 'openssl-1.1.0h/doc/ssl/SSL_CIPHER_get_name.pod')
| -rw-r--r-- | openssl-1.1.0h/doc/ssl/SSL_CIPHER_get_name.pod | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/openssl-1.1.0h/doc/ssl/SSL_CIPHER_get_name.pod b/openssl-1.1.0h/doc/ssl/SSL_CIPHER_get_name.pod new file mode 100644 index 0000000..b7ee3c8 --- /dev/null +++ b/openssl-1.1.0h/doc/ssl/SSL_CIPHER_get_name.pod @@ -0,0 +1,128 @@ +=pod + +=head1 NAME + +SSL_CIPHER_get_cipher_nid, SSL_CIPHER_get_digest_nid, SSL_CIPHER_get_kx_nid, +SSL_CIPHER_get_auth_nid, SSL_CIPHER_is_aead, +SSL_CIPHER_get_name, SSL_CIPHER_get_bits, +SSL_CIPHER_get_version, SSL_CIPHER_description +- get SSL_CIPHER properties + +=head1 SYNOPSIS + + #include <openssl/ssl.h> + + const char *SSL_CIPHER_get_name(const SSL_CIPHER *cipher); + int SSL_CIPHER_get_bits(const SSL_CIPHER *cipher, int *alg_bits); + char *SSL_CIPHER_get_version(const SSL_CIPHER *cipher); + char *SSL_CIPHER_description(const SSL_CIPHER *cipher, char *buf, int size); + int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c); + int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c); + int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c); + int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c); + int SSL_CIPHER_is_aead(const SSL_CIPHER *c); + +=head1 DESCRIPTION + +SSL_CIPHER_get_name() returns a pointer to the name of B<cipher>. If the +B<cipher> is NULL, it returns "(NONE)". + +SSL_CIPHER_get_bits() returns the number of secret bits used for B<cipher>. +If B<cipher> is NULL, 0 is returned. + +SSL_CIPHER_get_version() returns string which indicates the SSL/TLS protocol +version that first defined the cipher. It returns "(NONE)" if B<cipher> is NULL. + +SSL_CIPHER_get_cipher_nid() returns the cipher NID corresponding to B<c>. +If there is no cipher (e.g. for ciphersuites with no encryption) then +B<NID_undef> is returned. + +SSL_CIPHER_get_digest_nid() returns the digest NID corresponding to the MAC +used by B<c>. If there is no digest (e.g. for AEAD ciphersuites) then +B<NID_undef> is returned. + +SSL_CIPHER_get_kx_nid() returns the key exchange NID corresponding to the method +used by B<c>. If there is no key exchange, then B<NID_undef> is returned. Examples (not comprehensive): + + NID_kx_rsa + NID_kx_ecdhe + NID_kx_dhe + NID_kx_psk + +SSL_CIPHER_get_auth_nid() returns the authentication NID corresponding to the method +used by B<c>. If there is no authentication, then B<NID_undef> is returned. +Examples (not comprehensive): + + NID_auth_rsa + NID_auth_ecdsa + NID_auth_psk + +SSL_CIPHER_is_aead() returns 1 if the cipher B<c> is AEAD (e.g. GCM or +ChaCha20/Poly1305), and 0 if it is not AEAD. + +SSL_CIPHER_description() returns a textual description of the cipher used +into the buffer B<buf> of length B<len> provided. If B<buf> is provided, it +must be at least 128 bytes, otherwise a buffer will be allocated using +OPENSSL_malloc(). If the provided buffer is too small, or the allocation fails, +B<NULL> is returned. + +The string returned by SSL_CIPHER_description() consists of several fields +separated by whitespace: + +=over 4 + +=item <ciphername> + +Textual representation of the cipher name. + +=item <protocol version> + +Protocol version, such as B<TLSv1.2>, when the cipher was first defined. + +=item Kx=<key exchange> + +Key exchange method such as B<RSA>, B<ECDHE>, etc. + +=item Au=<authentication> + +Authentication method such as B<RSA>, B<None>, etc.. None is the +representation of anonymous ciphers. + +=item Enc=<symmetric encryption method> + +Encryption method, with number of secret bits, such as B<AESGCM(128)>. + +=item Mac=<message authentication code> + +Message digest, such as B<SHA256>. + +=back + +Some examples for the output of SSL_CIPHER_description(): + + ECDHE-RSA-AES256-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD + RSA-PSK-AES256-CBC-SHA384 TLSv1.0 Kx=RSAPSK Au=RSA Enc=AES(256) Mac=SHA384 + +=head1 HISTORY + +SSL_CIPHER_get_version() was updated to always return the correct protocol +string in OpenSSL 1.1. + +SSL_CIPHER_description() was changed to return B<NULL> on error, +rather than a fixed string, in OpenSSL 1.1 + +=head1 SEE ALSO + +L<ssl(3)>, L<SSL_get_current_cipher(3)>, +L<SSL_get_ciphers(3)>, L<ciphers(1)> + +=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 |