summaryrefslogtreecommitdiffstats
path: root/include/iprt/md2.h
blob: f5474c7bb1b248bed751cacd3ca0248f4e0a1a12 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
/** @file
 * IPRT - Message-Digest Algorithm 2.
 */

/*
 * Copyright (C) 2006-2023 Oracle and/or its affiliates.
 *
 * This file is part of VirtualBox base platform packages, as
 * available from https://www.virtualbox.org.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation, in version 3 of the
 * License.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see <https://www.gnu.org/licenses>.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
 * in the VirtualBox distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 *
 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
 */

#ifndef IPRT_INCLUDED_md2_h
#define IPRT_INCLUDED_md2_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif

#include <iprt/types.h>

RT_C_DECLS_BEGIN

/** @defgroup grp_rt_md2    RTMd2 - Message-Digest algorithm 2
 * @ingroup grp_rt
 * @{
 */

/** Size of a MD2 hash. */
#define RTMD2_HASH_SIZE     16
/** The length of a MD2 digest string. The terminator is not included. */
#define RTMD2_DIGEST_LEN    32

/**
 * MD2 hash algorithm context.
 */
typedef union RTMD2CONTEXT
{
    uint64_t            u64BetterAlignment;
    uint8_t             abPadding[4 + 16 + 16*4 + 16*4];
#ifdef RT_MD2_PRIVATE_CONTEXT
    MD2_CTX             Private;
#endif
#ifdef RT_MD2_PRIVATE_ALT_CONTEXT
    RTMD2ALTPRIVATECTX  AltPrivate;
#endif
} RTMD2CONTEXT;

/** Pointer to MD2 hash algorithm context. */
typedef RTMD2CONTEXT *PRTMD2CONTEXT;


/**
 * Compute the MD2 hash of the data.
 *
 * @param   pvBuf       Pointer to data.
 * @param   cbBuf       Length of data (in bytes).
 * @param   pabDigest   Where to store the hash.
 *                      (What's passed is a pointer to the caller's buffer.)
 */
RTDECL(void) RTMd2(const void *pvBuf, size_t cbBuf, uint8_t pabDigest[RTMD2_HASH_SIZE]);

/**
 * Initialize MD2 context.
 *
 * @param   pCtx        Pointer to the MD2 context to initialize.
 */
RTDECL(void) RTMd2Init(PRTMD2CONTEXT pCtx);

/**
 * Feed data into the MD2 computation.
 *
 * @param   pCtx        Pointer to the MD2 context.
 * @param   pvBuf       Pointer to data.
 * @param   cbBuf       Length of data (in bytes).
 */
RTDECL(void) RTMd2Update(PRTMD2CONTEXT pCtx, const void *pvBuf, size_t cbBuf);

/**
 * Compute the MD2 hash of the data.
 *
 * @param   pCtx        Pointer to the MD2 context.
 * @param   pabDigest   Where to store the hash. (What's passed is a pointer to
 *                      the caller's buffer.)
 */
RTDECL(void) RTMd2Final(PRTMD2CONTEXT pCtx, uint8_t pabDigest[RTMD2_HASH_SIZE]);

/**
 * Converts a MD2 hash to a digest string.
 *
 * @returns IPRT status code.
 *
 * @param   pabDigest   The binary digest returned by RTMd2Final or RTMd2.
 * @param   pszDigest   Where to return the stringified digest.
 * @param   cchDigest   The size of the output buffer. Should be at least
 *                      RTMD2_STRING_LEN + 1 bytes.
 */
RTDECL(int) RTMd2ToString(uint8_t const pabDigest[RTMD2_HASH_SIZE], char *pszDigest, size_t cchDigest);

/**
 * Converts a MD2 hash to a digest string.
 *
 * @returns IPRT status code.
 *
 * @param   pszDigest   The stringified digest. Leading and trailing spaces are
 *                      ignored.
 * @param   pabDigest   Where to store the hash. (What is passed is a pointer to
 *                      the caller's buffer.)
 */
RTDECL(int) RTMd2FromString(char const *pszDigest, uint8_t pabDigest[RTMD2_HASH_SIZE]);

/** @} */

RT_C_DECLS_END

#endif /* !IPRT_INCLUDED_md2_h */