md5(3)
NAME
MD2, MD4, MD5, MD2_Init, MD2_Update, MD2_Final, MD4_Init, MD4_Update,
MD4_Final, MD5_Init, MD5_Update, MD5_Final - MD2, MD4, and MD5 hash
functions
SYNOPSIS
#include <openssl/md2.h>
unsigned char *MD2(const unsigned char *d, unsigned long n,
unsigned char *md);
int MD2_Init(MD2_CTX *c);
int MD2_Update(MD2_CTX *c, const unsigned char *data,
unsigned long len);
int MD2_Final(unsigned char *md, MD2_CTX *c);
#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);
DESCRIPTION
MD2, MD4, and MD5 are cryptographic hash functions with a 128 bit
output.
MD2(), MD4(), and MD5() compute the MD2, MD4, and MD5 message digest of
the n bytes at d and place it in md (which must have space for
MD2_DIGEST_LENGTH == MD4_DIGEST_LENGTH == MD5_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:
MD2_Init() initializes a MD2_CTX structure.
MD2_Update() can be called repeatedly with chunks of the message to be
hashed (len bytes at data).
MD2_Final() places the message digest in md, which must have space for
MD2_DIGEST_LENGTH == 16 bytes of output, and erases the MD2_CTX.
MD4md5(3)Update(), and
MD5md5(3) structure.
Applications should use the higher level functions EVP_DigestInit(3)
etc. instead of calling the hash functions directly.
NOTE
MD2, MD4, and MD5 are recommended only for compatibility with existing
applications. In new applications, SHA-1 or RIPEMD-160 should be
preferred.
RETURN VALUES
MD2(), MD4(), and MD5() return pointers to the hash value.
MD2_Init(), MD2_Update(), MD2_Final(), MD4_Init(), MD4_Update(),
MD4md5(3)Final() return 1 for
success, 0 otherwise.
CONFORMING TO
RFC 1319, RFC 1320, RFC 1321
SEE ALSO
sha(3), ripemd(3), EVP_DigestInit(3)
HISTORY
MD2(), MD2md5(3)Init(),
MD5md5(3)Final() are available in all versions of SSLeay
and OpenSSL.
MD4(), MD4_Init(), and MD4_Update() are available in OpenSSL 0.9.6 and
above.
1.0.0 2006-10-27 md5(3)
openssl 1.0.0 - Generated Wed Apr 7 18:15:01 CDT 2010