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MD5(3) | Library Functions Manual | MD5(3) |
NAME
MD4
, MD5
,
MD4_Init
,
MD4_Update
,
MD4_Final
,
MD5_Init
,
MD5_Update
,
MD5_Final
—
MD4 and MD5 hash functions
SYNOPSIS
#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
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. 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:
MD5_Init
() initializes a
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.
SEE ALSO
EVP_DigestInit(3)STANDARDS
RFC 1320, RFC 1321HISTORY
MD5
(),
MD5_Init
(),
MD5_Update
(), and
MD5_Final
() appeared in SSLeay 0.4 or
earlier and have been available since OpenBSD 2.4.
MD4
(),
MD4_Init
(),
MD4_Update
(), and
MD4_Final
() first appeared in OpenSSL 0.9.6
and have been available since OpenBSD 2.9.March 27, 2018 | Debian |