Unix/Linux Go Back    


Linux 2.6 - man page for ssl_cipher_get_name (linux section 3SSL)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


SSL_CIPHER_get_name(3SSL)		     OpenSSL			SSL_CIPHER_get_name(3SSL)

NAME
       SSL_CIPHER_get_name, SSL_CIPHER_get_bits, SSL_CIPHER_get_version, SSL_CIPHER_description -
       get SSL_CIPHER properties

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 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 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. 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), ciphers(1)

1.0.0e					    2009-09-12			SSL_CIPHER_get_name(3SSL)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 06:04 AM.