libressl-MD53
Md4 and md5 hash functions
Usage
Crypto Library (libcrypto, -lcrypto)
#include <openssl/md4.h>
unsigned char *
MD4(const unsigned char *d, unsigned long n, unsigned char *md);
int
MD4_Init(MD4_CTX *c);
int
MD4_Update(MD4_CTX *c, const void *data, unsigned long len);
int
MD4_Final(unsigned char *md, MD4_CTX *c);
#include <openssl/md5.h>
unsigned char *
MD5(const unsigned char *d, unsigned long n, unsigned char *md);
int
MD5_Init(MD5_CTX *c);
int
MD5_Update(MD5_CTX *c, const void *data, unsigned long len);
int
MD5_Final(unsigned char *md, MD5_CTX *c);
Overview
MD4 and MD5 are cryptographic hash functions with a 128-bit output.
MD4() and MD5() compute the MD4 and MD5 message digest of the n bytes at d and place it in md, which must have space for MD4_DIGEST_LENGTH == MD5_DIGEST_LENGTH == 16 bytes of output.
The following functions may be used if the message is not completely stored in memory:
MD5_Init() initializes an MD5_CTX structure.
MD5_Update() can be called repeatedly with chunks of the message to be hashed (len bytes at data).
MD5_Final() places the message digest in md, which must have space for MD5_DIGEST_LENGTH == 16 bytes of output, and erases the MD5_CTX.
MD4_Init(), MD4_Update(), and MD4_Final() are analogous using an MD4_CTX structure.
Applications should use the higher level functions EVP_DigestInit(3) etc. instead of calling these hash functions directly.
Return values
MD4() and MD5() return pointers to the hash value.
MD4_Init(), MD4_Update(), MD4_Final(), MD5_Init(), MD5_Update(), and MD5_Final() return 1 for success or 0 otherwise.
Caveats
Other implementations allow md in MD4() and MD5() to be NULL and return a static array, which is not thread safe.