5 MDC2, MDC2_Init, MDC2_Update, MDC2_Final - MDC2 hash function
9 #include <openssl/mdc2.h>
11 unsigned char *MDC2(const unsigned char *d, unsigned long n,
14 int MDC2_Init(MDC2_CTX *c);
15 int MDC2_Update(MDC2_CTX *c, const unsigned char *data,
17 int MDC2_Final(unsigned char *md, MDC2_CTX *c);
21 MDC2 is a method to construct hash functions with 128 bit output from
22 block ciphers. These functions are an implementation of MDC2 with
25 MDC2() computes the MDC2 message digest of the B<n>
26 bytes at B<d> and places it in B<md> (which must have space for
27 MDC2_DIGEST_LENGTH == 16 bytes of output). If B<md> is NULL, the digest
28 is placed in a static array.
30 The following functions may be used if the message is not completely
33 MDC2_Init() initializes a B<MDC2_CTX> structure.
35 MDC2_Update() can be called repeatedly with chunks of the message to
36 be hashed (B<len> bytes at B<data>).
38 MDC2_Final() places the message digest in B<md>, which must have space
39 for MDC2_DIGEST_LENGTH == 16 bytes of output, and erases the B<MDC2_CTX>.
41 Applications should use the higher level functions
42 L<EVP_DigestInit(3)> etc. instead of calling the
43 hash functions directly.
47 MDC2() returns a pointer to the hash value.
49 MDC2_Init(), MDC2_Update() and MDC2_Final() return 1 for success, 0 otherwise.
53 ISO/IEC 10118-2:2000 Hash-Function 2, with DES as the underlying block cipher.
61 Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
63 Licensed under the OpenSSL license (the "License"). You may not use
64 this file except in compliance with the License. You can obtain a copy
65 in the file LICENSE in the source distribution or at
66 L<https://www.openssl.org/source/license.html>.