mdc2_final(3) - Linux man page

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.