Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
mdc2(3)				    OpenSSL			       mdc2(3)

NAME
       MDC2, MDC2_Init,	MDC2_Update, MDC2_Final	- MDC2 hash function

SYNOPSIS
	#include <openssl/mdc2.h>

	unsigned char *MDC2(const unsigned char	*d, unsigned long n,
			 unsigned char *md);

	int MDC2_Init(MDC2_CTX *c);
	int MDC2_Update(MDC2_CTX *c, const unsigned char *data,
			 unsigned long len);
	int MDC2_Final(unsigned	char *md, MDC2_CTX *c);

DESCRIPTION
       MDC2 is a method	to construct hash functions with 128 bit output	from
       block ciphers.  These functions are an implementation of	MDC2 with DES.

       MDC2() computes the MDC2	message	digest of the n	bytes at d and places
       it in md	(which must have space for MDC2_DIGEST_LENGTH == 16 bytes of
       output).	If md is NULL, the digest is placed in a static	array.

       The following functions may be used if the message is not completely
       stored in memory:

       MDC2_Init() initializes a MDC2_CTX structure.

       MDC2_Update() can be called repeatedly with chunks of the message to be
       hashed (len bytes at data).

       MDC2_Final() places the message digest in md, which must	have space for
       MDC2_DIGEST_LENGTH == 16	bytes of output, and erases the	MDC2_CTX.

       Applications should use the higher level	functions EVP_DigestInit(3)
       etc. instead of calling the hash	functions directly.

RETURN VALUES
       MDC2() returns a	pointer	to the hash value.

       MDC2_Init(), MDC2_Update() and MDC2_Final() return 1 for	success, 0
       otherwise.

CONFORMING TO
       ISO/IEC 10118-2,	with DES

SEE ALSO
       sha(3), EVP_DigestInit(3)

HISTORY
       MDC2(), MDC2_Init(), MDC2_Update() and MDC2_Final() are available since
       SSLeay 0.8.

0.9.8y				  2013-02-05			       mdc2(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | CONFORMING TO | SEE ALSO | HISTORY

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=mdc2&sektion=3&manpath=FreeBSD+9.2-RELEASE>

home | help