MDC2_Init3ssl
Mdc2 hash function
Usage
#include <openssl/mdc2.h>The following functions have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable version value, see openssl_user_macros(7):
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);
Overview
All of the functions described on this page are deprecated. Applications should instead use EVP_DigestInit_ex(3), EVP_DigestUpdate(3) and EVP_DigestFinal_ex(3).
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.
Releases
12 releases since Debian 3.1 (Sarge); the text changed 11 times.