5 MD2, MD4, MD5, MD2_Init, MD2_Update, MD2_Final, MD4_Init, MD4_Update,
6 MD4_Final, MD5_Init, MD5_Update, MD5_Final - MD2, MD4, and MD5 hash functions
10 #include <openssl/md2.h>
12 unsigned char *MD2(const unsigned char *d, unsigned long n,
15 int MD2_Init(MD2_CTX *c);
16 int MD2_Update(MD2_CTX *c, const unsigned char *data,
18 int MD2_Final(unsigned char *md, MD2_CTX *c);
21 #include <openssl/md4.h>
23 unsigned char *MD4(const unsigned char *d, unsigned long n,
26 int MD4_Init(MD4_CTX *c);
27 int MD4_Update(MD4_CTX *c, const void *data,
29 int MD4_Final(unsigned char *md, MD4_CTX *c);
32 #include <openssl/md5.h>
34 unsigned char *MD5(const unsigned char *d, unsigned long n,
37 int MD5_Init(MD5_CTX *c);
38 int MD5_Update(MD5_CTX *c, const void *data,
40 int MD5_Final(unsigned char *md, MD5_CTX *c);
44 MD2, MD4, and MD5 are cryptographic hash functions with a 128 bit output.
46 MD2(), MD4(), and MD5() compute the MD2, MD4, and MD5 message digest
47 of the B<n> bytes at B<d> and place it in B<md> (which must have space
48 for MD2_DIGEST_LENGTH == MD4_DIGEST_LENGTH == MD5_DIGEST_LENGTH == 16
49 bytes of output). If B<md> is NULL, the digest is placed in a static
52 The following functions may be used if the message is not completely
55 MD2_Init() initializes a B<MD2_CTX> structure.
57 MD2_Update() can be called repeatedly with chunks of the message to
58 be hashed (B<len> bytes at B<data>).
60 MD2_Final() places the message digest in B<md>, which must have space
61 for MD2_DIGEST_LENGTH == 16 bytes of output, and erases the B<MD2_CTX>.
63 MD4_Init(), MD4_Update(), MD4_Final(), MD5_Init(), MD5_Update(), and
64 MD5_Final() are analogous using an B<MD4_CTX> and B<MD5_CTX> structure.
66 Applications should use the higher level functions
68 etc. instead of calling the hash functions directly.
72 MD2, MD4, and MD5 are recommended only for compatibility with existing
73 applications. In new applications, SHA-1 or RIPEMD-160 should be
78 MD2(), MD4(), and MD5() return pointers to the hash value.
80 MD2_Init(), MD2_Update(), MD2_Final(), MD4_Init(), MD4_Update(),
81 MD4_Final(), MD5_Init(), MD5_Update(), and MD5_Final() return 1 for
86 RFC 1319, RFC 1320, RFC 1321
94 Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
96 Licensed under the OpenSSL license (the "License"). You may not use
97 this file except in compliance with the License. You can obtain a copy
98 in the file LICENSE in the source distribution or at
99 L<https://www.openssl.org/source/license.html>.