MDC2_INIT - Online Linux Manual PageSection : 3
Updated : 2021-03-26
Source : 1.1.1k
Note : OpenSSL
NAMEMDC2, 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 10118−2:2000 Hash-Function 2, with DES as the underlying block cipher.
SEE ALSO​EVP_DigestInit (3)
COPYRIGHTCopyright 2000−2017 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the ‟License”). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. 0
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