SSL_CIPHER_get_name(3) - NetBSD Manual Pages

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SSL_CIPHER_get_name(3)       OpenSSL       SSL_CIPHER_get_name(3)



NAME

       SSL_CIPHER_get_name, SSL_CIPHER_get_bits,
       SSL_CIPHER_get_version, SSL_CIPHER_description - get
       SSL_CIPHER properties


LIBRARY

       libcrypto, -lcrypto


SYNOPSIS

        #include <openssl/ssl.h>

        const char *SSL_CIPHER_get_name(SSL_CIPHER *cipher);
        int SSL_CIPHER_get_bits(SSL_CIPHER *cipher, int *alg_bits);
        char *SSL_CIPHER_get_version(SSL_CIPHER *cipher);
        char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int size);



DESCRIPTION

       SSL_CIPHER_get_name() returns a pointer to the name of
       cipher. If the argument is the NULL pointer, a pointer to
       the constant value "NONE" is returned.

       SSL_CIPHER_get_bits() returns the number of secret bits
       used for cipher. If alg_bits is not NULL, it contains the
       number of bits processed by the chosen algorithm. If
       cipher is NULL, 0 is returned.

       SSL_CIPHER_get_version() returns the protocol version for
       cipher, currently "SSLv2", "SSLv3", or "TLSv1". If cipher
       is NULL, "(NONE)" is returned.

       SSL_CIPHER_description() returns a textual description of
       the cipher used into the buffer buf of length len pro-
       vided. len must be at least 128 bytes, otherwise a pointer
       to the the string "Buffer too small" is returned. If buf
       is NULL, a buffer of 128 bytes is allocated using
       OPENSSL_malloc(). If the allocation fails, a pointer to
       the string "OPENSSL_malloc Error" is returned.


NOTES

       The number of bits processed can be different from the
       secret bits. An export cipher like e.g. EXP-RC4-MD5 has
       only 40 secret bits. The algorithm does use the full 128
       bits (which would be returned for alg_bits), of which how-
       ever 88bits are fixed. The search space is hence only 40
       bits.

       The string returned by SSL_CIPHER_description() in case of
       success consists of cleartext information separated by one
       or more blanks in the following sequence:

       <ciphername>
           Textual representation of the cipher name.




2001-04-12                    0.9.6g                            1





SSL_CIPHER_get_name(3)       OpenSSL       SSL_CIPHER_get_name(3)


       <protocol version>
           Protocol version: SSLv2, SSLv3. The TLSv1 ciphers are
           flagged with SSLv3.

       Kx=<key exchange>
           Key exchange method: RSA (for export ciphers as
           RSA(512) or RSA(1024)), DH (for export ciphers as
           DH(512) or DH(1024)), DH/RSA, DH/DSS, Fortezza.

       Au=<authentication>
           Authentication method: RSA, DSS, DH, None. None is the
           representation of anonymous ciphers.

       Enc=<symmetric encryption method>
           Encryption method with number of secret bits: DES(40),
           DES(56), 3DES(168), RC4(40), RC4(56), RC4(64),
           RC4(128), RC2(40), RC2(56), RC2(128), IDEA(128),
           Fortezza, None.

       Mac=<message authentication code>
           Message digest: MD5, SHA1.

       <export flag>
           If the cipher is flagged exportable with respect to
           old US crypto regulations, the word "export" is
           printed.


EXAMPLES

       Some examples for the output of SSL_CIPHER_description():

        EDH-RSA-DES-CBC3-SHA    SSLv3 Kx=DH       Au=RSA  Enc=3DES(168) Mac=SHA1
        EDH-DSS-DES-CBC3-SHA    SSLv3 Kx=DH       Au=DSS  Enc=3DES(168) Mac=SHA1
        RC4-MD5                 SSLv3 Kx=RSA      Au=RSA  Enc=RC4(128)  Mac=MD5
        EXP-RC4-MD5             SSLv3 Kx=RSA(512) Au=RSA  Enc=RC4(40)   Mac=MD5  export



BUGS

       If SSL_CIPHER_description() is called with cipher being
       NULL, the library crashes.

       If SSL_CIPHER_description() cannot handle a built-in
       cipher, the according description of the cipher property
       is unknown. This case should not occur.


RETURN VALUES

       See DESCRIPTION


SEE ALSO

       ssl(3), SSL_get_current_cipher(3), SSL_get_ciphers(3),
       openssl_ciphers(1)







2001-04-12                    0.9.6g                            2