Home Man
Today's Posts

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:
Select Section of Man Page:
Select Man Page Repository:

NetBSD 6.1.5 - man page for ssl_cipher_get_name (netbsd section 3)

SSL_CIPHER_get_name(3)			     OpenSSL			   SSL_CIPHER_get_name(3)

       SSL_CIPHER_get_name, SSL_CIPHER_get_bits, SSL_CIPHER_get_version, SSL_CIPHER_description -
       get SSL_CIPHER properties

       libcrypto, -lcrypto

	#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);

       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.

       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:

	   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.

	   Authentication method: RSA, DSS, DH, None. None is the representation of anonymous

       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.

       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

       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.


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

1.0.1i					    2014-08-10			   SSL_CIPHER_get_name(3)

All times are GMT -4. The time now is 07:05 AM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.
Show Password

Not a Forum Member?
Forgot Password?