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:
MDC2mdc2(3) 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(3).
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.
MDC2mdc2(3)Final() return 1 for success, 0
otherwise.
CONFORMING TO
ISO/IEC 10118-2, with DES
SEE ALSO
sha(3), EVP_DigestInit(3)
HISTORY
MDC2(), MDC2mdc2(3)Final() are available since
SSLeay 0.8.
1.0.0 2006-10-27 mdc2(3)
openssl 1.0.0 - Generated Wed Apr 7 18:15:58 CDT 2010