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(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);


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 string which indicates the SSL/TLS
       protocol version that first defined the cipher.  This is currently
       SSLv2 or TLSv1/SSLv3.  In some cases it should possibly return
       "TLSv1.2" but does not; use SSL_CIPHER_description() instead.  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 provided. len must be at least
       128 bytes, otherwise a pointer to 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 however 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.

       <protocol version>
           Protocol version: SSLv2, SSLv3, TLSv1.2. The TLSv1.0 ciphers are
           flagged with SSLv3. No new ciphers were added by TLSv1.1.

       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

       A comp[lete list can be retrieved by invoking the following command:

        openssl ciphers -v ALL


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)



1.0.1u                            2014-08-10            SSL_CIPHER_get_name(3)