5 MDC2, MDC2_Init, MDC2_Update, MDC2_Final - MDC2 hash function
9 #include <openssl/mdc2.h>
11 Deprecated since OpenSSL 3.0, can be hidden entirely by defining
12 B<OPENSSL_API_COMPAT> with a suitable version value, see
13 L<openssl_user_macros(7)>:
15 unsigned char *MDC2(const unsigned char *d, unsigned long n,
18 int MDC2_Init(MDC2_CTX *c);
19 int MDC2_Update(MDC2_CTX *c, const unsigned char *data,
21 int MDC2_Final(unsigned char *md, MDC2_CTX *c);
25 All of the functions described on this page are deprecated.
26 Applications should instead use L<EVP_DigestInit_ex(3)>, L<EVP_DigestUpdate(3)>
27 and L<EVP_DigestFinal_ex(3)>.
29 MDC2 is a method to construct hash functions with 128 bit output from
30 block ciphers. These functions are an implementation of MDC2 with
33 MDC2() computes the MDC2 message digest of the B<n>
34 bytes at B<d> and places it in B<md> (which must have space for
35 MDC2_DIGEST_LENGTH == 16 bytes of output). If B<md> is NULL, the digest
36 is placed in a static array.
38 The following functions may be used if the message is not completely
41 MDC2_Init() initializes a B<MDC2_CTX> structure.
43 MDC2_Update() can be called repeatedly with chunks of the message to
44 be hashed (B<len> bytes at B<data>).
46 MDC2_Final() places the message digest in B<md>, which must have space
47 for MDC2_DIGEST_LENGTH == 16 bytes of output, and erases the B<MDC2_CTX>.
49 Applications should use the higher level functions
50 L<EVP_DigestInit(3)> etc. instead of calling the
51 hash functions directly.
55 MDC2() returns a pointer to the hash value.
57 MDC2_Init(), MDC2_Update() and MDC2_Final() return 1 for success, 0 otherwise.
61 ISO/IEC 10118-2:2000 Hash-Function 2, with DES as the underlying block cipher.
69 All of these functions were deprecated in OpenSSL 3.0.
73 Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
75 Licensed under the Apache License 2.0 (the "License"). You may not use
76 this file except in compliance with the License. You can obtain a copy
77 in the file LICENSE in the source distribution or at
78 L<https://www.openssl.org/source/license.html>.