=pod =head1 NAME MDC2, MDC2_Init, MDC2_Update, MDC2_Final - MDC2 hash function =head1 SYNOPSIS #include 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); =head1 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 B bytes at B and places it in B (which must have space for MDC2_DIGEST_LENGTH == 16 bytes of output). If B 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 B structure. MDC2_Update() can be called repeatedly with chunks of the message to be hashed (B bytes at B). MDC2_Final() places the message digest in B, which must have space for MDC2_DIGEST_LENGTH == 16 bytes of output, and erases the B. Applications should use the higher level functions L etc. instead of calling the hash functions directly. =head1 RETURN VALUES MDC2() returns a pointer to the hash value. MDC2_Init(), MDC2_Update() and MDC2_Final() return 1 for success, 0 otherwise. =head1 CONFORMING TO ISO/IEC 10118-2, with DES =head1 SEE ALSO L =head1 COPYRIGHT Copyright 2000-2016 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 L. =cut