1/**
2 * @copyright
3 * ====================================================================
4 *    Licensed to the Apache Software Foundation (ASF) under one
5 *    or more contributor license agreements.  See the NOTICE file
6 *    distributed with this work for additional information
7 *    regarding copyright ownership.  The ASF licenses this file
8 *    to you under the Apache License, Version 2.0 (the
9 *    "License"); you may not use this file except in compliance
10 *    with the License.  You may obtain a copy of the License at
11 *
12 *      http://www.apache.org/licenses/LICENSE-2.0
13 *
14 *    Unless required by applicable law or agreed to in writing,
15 *    software distributed under the License is distributed on an
16 *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 *    KIND, either express or implied.  See the License for the
18 *    specific language governing permissions and limitations
19 *    under the License.
20 * ====================================================================
21 * @endcopyright
22 *
23 * @file svn_pseudo_md5.h
24 * @brief Subversion hash sum calculation for runtime data (only)
25 */
26
27#ifndef SVN_PSEUDO_MD5_H
28#define SVN_PSEUDO_MD5_H
29
30#include <apr.h>        /* for apr_uint32_t */
31
32#ifdef __cplusplus
33extern "C" {
34#endif /* __cplusplus */
35
36
37/**
38 * Calculates a hash sum for 15 bytes in @a x and returns it in @a digest.
39 * The most significant byte in @a x must be 0 (independent of being on a
40 * little or big endian machine).
41 *
42 * @note Use for runtime data hashing only.
43 *
44 * @note The output is NOT an MD5 digest shares has the same basic
45 *       cryptographic properties.  Collisions with proper MD5 on the same
46 *       or other input data is equally unlikely as any MD5 collision.
47 */
48void svn__pseudo_md5_15(apr_uint32_t digest[4],
49                        const apr_uint32_t x[4]);
50
51/**
52 * Calculates a hash sum for 31 bytes in @a x and returns it in @a digest.
53 * The most significant byte in @a x must be 0 (independent of being on a
54 * little or big endian machine).
55 *
56 * @note Use for runtime data hashing only.
57 *
58 * @note The output is NOT an MD5 digest shares has the same basic
59 *       cryptographic properties.  Collisions with proper MD5 on the same
60 *       or other input data is equally unlikely as any MD5 collision.
61 */
62void svn__pseudo_md5_31(apr_uint32_t digest[4],
63                        const apr_uint32_t x[8]);
64
65/**
66 * Calculates a hash sum for 63 bytes in @a x and returns it in @a digest.
67 * The most significant byte in @a x must be 0 (independent of being on a
68 * little or big endian machine).
69 *
70 * @note Use for runtime data hashing only.
71 *
72 * @note The output is NOT an MD5 digest shares has the same basic
73 *       cryptographic properties.  Collisions with proper MD5 on the same
74 *       or other input data is equally unlikely as any MD5 collision.
75 */
76void svn__pseudo_md5_63(apr_uint32_t digest[4],
77                        const apr_uint32_t x[16]);
78
79#ifdef __cplusplus
80}
81#endif /* __cplusplus */
82
83#endif /* SVN_PSEUDO_MD5_H */
84