1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2  * All rights reserved.
3  *
4  * This package is an SSL implementation written
5  * by Eric Young (eay@cryptsoft.com).
6  * The implementation was written so as to conform with Netscapes SSL.
7  *
8  * This library is free for commercial and non-commercial use as long as
9  * the following conditions are aheared to.  The following conditions
10  * apply to all code found in this distribution, be it the RC4, RSA,
11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12  * included with this distribution is covered by the same copyright terms
13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14  *
15  * Copyright remains Eric Young's, and as such any Copyright notices in
16  * the code are not to be removed.
17  * If this package is used in a product, Eric Young should be given attribution
18  * as the author of the parts of the library used.
19  * This can be in the form of a textual message at program startup or
20  * in documentation (online or textual) provided with the package.
21  *
22  * Redistribution and use in source and binary forms, with or without
23  * modification, are permitted provided that the following conditions
24  * are met:
25  * 1. Redistributions of source code must retain the copyright
26  *    notice, this list of conditions and the following disclaimer.
27  * 2. Redistributions in binary form must reproduce the above copyright
28  *    notice, this list of conditions and the following disclaimer in the
29  *    documentation and/or other materials provided with the distribution.
30  * 3. All advertising materials mentioning features or use of this software
31  *    must display the following acknowledgement:
32  *    "This product includes cryptographic software written by
33  *     Eric Young (eay@cryptsoft.com)"
34  *    The word 'cryptographic' can be left out if the rouines from the library
35  *    being used are not cryptographic related :-).
36  * 4. If you include any Windows specific code (or a derivative thereof) from
37  *    the apps directory (application code) you must include an acknowledgement:
38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39  *
40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50  * SUCH DAMAGE.
51  *
52  * The licence and distribution terms for any publically available version or
53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
54  * copied and put under another distribution licence
55  * [including the GNU Public Licence.] */
56 
57 #ifndef OPENSSL_HEADER_MD4_H
58 #define OPENSSL_HEADER_MD4_H
59 
60 #include <openssl/base.h>
61 
62 #if defined(__cplusplus)
63 extern "C" {
64 #endif
65 
66 
67 // MD4.
68 
69 // MD4_CBLOCK is the block size of MD4.
70 #define MD4_CBLOCK 64
71 
72 // MD4_DIGEST_LENGTH is the length of an MD4 digest.
73 #define MD4_DIGEST_LENGTH 16
74 
75 // MD4_Init initialises |md4| and returns one.
76 OPENSSL_EXPORT int MD4_Init(MD4_CTX *md4);
77 
78 // MD4_Update adds |len| bytes from |data| to |md4| and returns one.
79 OPENSSL_EXPORT int MD4_Update(MD4_CTX *md4, const void *data, size_t len);
80 
81 // MD4_Final adds the final padding to |md4| and writes the resulting digest to
82 // |out|, which must have at least |MD4_DIGEST_LENGTH| bytes of space. It
83 // returns one.
84 OPENSSL_EXPORT int MD4_Final(uint8_t out[MD4_DIGEST_LENGTH], MD4_CTX *md4);
85 
86 // MD4 writes the digest of |len| bytes from |data| to |out| and returns |out|.
87 // There must be at least |MD4_DIGEST_LENGTH| bytes of space in |out|.
88 OPENSSL_EXPORT uint8_t *MD4(const uint8_t *data, size_t len,
89                             uint8_t out[MD4_DIGEST_LENGTH]);
90 
91 // MD4_Transform is a low-level function that performs a single, MD4 block
92 // transformation using the state from |md4| and 64 bytes from |block|.
93 OPENSSL_EXPORT void MD4_Transform(MD4_CTX *md4,
94                                   const uint8_t block[MD4_CBLOCK]);
95 
96 struct md4_state_st {
97   uint32_t h[4];
98   uint32_t Nl, Nh;
99   uint8_t data[MD4_CBLOCK];
100   unsigned num;
101 };
102 
103 
104 #if defined(__cplusplus)
105 }  // extern C
106 #endif
107 
108 #endif  // OPENSSL_HEADER_MD4_H
109