58 lines
1.9 KiB
Text
58 lines
1.9 KiB
Text
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=pod
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=head1 NAME
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SSL_CIPHER_get_name, SSL_CIPHER_get_bits, SSL_CIPHER_get_version,
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SSL_CIPHER_description - get SSL_CIPHER properties
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=head1 SYNOPSIS
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#include <openssl/ssl.h>
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const char *SSL_CIPHER_get_name(SSL_CIPHER *cipher);
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int SSL_CIPHER_get_bits(SSL_CIPHER *cipher, int *alg_bits);
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char *SSL_CIPHER_get_version(SSL_CIPHER *cipher);
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char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int size);
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=head1 DESCRIPTION
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SSL_CIPHER_get_name() returns a pointer to the name of B<cipher>. If the
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argument is the NULL pointer, a pointer to the constant value "NONE" is
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returned.
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SSL_CIPHER_get_bits() returns the number of secret bits used for B<cipher>. If
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B<alg_bits> is not NULL, it contains the number of bits processed by the
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chosen algorithm. If B<cipher> is NULL, 0 is returned.
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SSL_CIPHER_get_version() returns the protocol version for B<cipher>, currently
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"SSLv2", "SSLv3", or "TLSv1". If B<cipher> is NULL, "(NONE)" is returned.
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SSL_CIPHER_description() returns a textual description of the cipher used
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into the buffer B<buf> of length B<len> provided. B<len> must be at least
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128 bytes, otherwise the string "Buffer too small" is returned. If B<buf>
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is NULL, a buffer of 128 bytes is allocated using OPENSSL_malloc(). If the
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allocation fails, the string "OPENSSL_malloc Error" is returned.
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=head1 NOTES
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The number of bits processed can be different from the secret bits. An
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export cipher like e.g. EXP-RC4-MD5 has only 40 secret bits. The algorithm
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does use the full 128 bits (which would be returned for B<alg_bits>), of
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which however 88bits are fixed. The search space is hence only 40 bits.
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=head1 BUGS
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If SSL_CIPHER_description() is called with B<cipher> being NULL, the
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library crashes.
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=head1 RETURN VALUES
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See DESCRIPTION
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=head1 SEE ALSO
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L<ssl(3)|ssl(3)>, L<SSL_get_current_cipher(3)|SSL_get_current_cipher(3)>,
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L<SSL_get_ciphers(3)|SSL_get_ciphers(3)>
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=cut
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