mdc2 - MDC2 hash function
#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);
mdc2(3openssl) OpenSSL mdc2(3openssl)
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
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+--------------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------------+
|Availability | library/security/openssl |
+---------------+--------------------------+
|Stability | Pass-through uncommitted |
+---------------+--------------------------+
SEE ALSO
sha(3), EVP_DigestInit(3)
HISTORY
MDC2(), MDC2_Init(), MDC2_Update() and MDC2_Final() are available since
SSLeay 0.8.
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from
https://www.openssl.org/source/openssl-1.0.2ze.tar.gz.
Further information about this software can be found on the open source
community website at https://www.openssl.org/.
1.0.2ze 2022-05-03 mdc2(3openssl)