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1 | /* -*-c-*- |
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2 | * |
3 | * The HAS160 message digest function |
4 | * |
5 | * (c) 2004 Straylight/Edgeware |
6 | */ |
7 | |
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8 | /*----- Licensing notice --------------------------------------------------* |
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9 | * |
10 | * This file is part of Catacomb. |
11 | * |
12 | * Catacomb is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU Library General Public License as |
14 | * published by the Free Software Foundation; either version 2 of the |
15 | * License, or (at your option) any later version. |
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16 | * |
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17 | * Catacomb is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU Library General Public License for more details. |
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21 | * |
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22 | * You should have received a copy of the GNU Library General Public |
23 | * License along with Catacomb; if not, write to the Free |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
25 | * MA 02111-1307, USA. |
26 | */ |
27 | |
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28 | /*----- Notes on the HAS160 hash function ---------------------------------* |
29 | * |
30 | * HAS160 was designed by Chae Hoon Lim and the Korean Information Security |
31 | * Agency (KISA). It's recommended for use with KCDSA (though I think I'm |
32 | * happer with RIPEMD-160 or SHA1). It's here so I can check KCDSA test |
33 | * vectors. |
34 | */ |
35 | |
36 | #ifndef CATACOMB_HAS160_H |
37 | #define CATACOMB_HAS160_H |
38 | |
39 | #ifdef __cplusplus |
40 | extern "C" { |
41 | #endif |
42 | |
43 | /*----- Header files ------------------------------------------------------*/ |
44 | |
45 | #include <mLib/bits.h> |
46 | |
47 | #ifndef CATACOMB_GHASH_H |
48 | # include "ghash.h" |
49 | #endif |
50 | |
51 | /*----- Magic numbers -----------------------------------------------------*/ |
52 | |
53 | #define HAS160_BUFSZ 64 |
54 | #define HAS160_HASHSZ 20 |
55 | #define HAS160_STATESZ 20 |
56 | |
57 | /*----- Data structures ---------------------------------------------------*/ |
58 | |
59 | typedef struct has160_ctx { |
60 | uint32 a, b, c, d, e; /* Chaining variables */ |
61 | uint32 nl, nh; /* Byte count so far */ |
62 | unsigned off; /* Offset into buffer */ |
63 | octet buf[HAS160_BUFSZ]; /* Accumulation buffer */ |
64 | } has160_ctx; |
65 | |
66 | /*----- Functions provided ------------------------------------------------*/ |
67 | |
68 | /* --- @has160_compress@ --- * |
69 | * |
70 | * Arguments: @has160_ctx *ctx@ = pointer to context block |
71 | * @const void *sbuf@ = pointer to buffer of appropriate size |
72 | * |
73 | * Returns: --- |
74 | * |
75 | * Use: HAS160 compression function. |
76 | */ |
77 | |
78 | extern void has160_compress(has160_ctx */*ctx*/, const void */*sbuf*/); |
79 | |
80 | /* --- @has160_init@ --- * |
81 | * |
82 | * Arguments: @has160_ctx *ctx@ = pointer to context block to initialize |
83 | * |
84 | * Returns: --- |
85 | * |
86 | * Use: Initializes a context block ready for hashing. |
87 | */ |
88 | |
89 | extern void has160_init(has160_ctx */*ctx*/); |
90 | |
91 | /* --- @has160_set@ --- * |
92 | * |
93 | * Arguments: @has160_ctx *ctx@ = pointer to context block |
94 | * @const void *buf@ = pointer to state buffer |
95 | * @unsigned long count@ = current count of bytes processed |
96 | * |
97 | * Returns: --- |
98 | * |
99 | * Use: Initializes a context block from a given state. This is |
100 | * useful in cases where the initial hash state is meant to be |
101 | * secret, e.g., for NMAC and HMAC support. |
102 | */ |
103 | |
104 | extern void has160_set(has160_ctx */*ctx*/, const void */*buf*/, |
105 | unsigned long /*count*/); |
106 | |
107 | /* --- @has160_hash@ --- * |
108 | * |
109 | * Arguments: @has160_ctx *ctx@ = pointer to context block |
110 | * @const void *buf@ = buffer of data to hash |
111 | * @size_t sz@ = size of buffer to hash |
112 | * |
113 | * Returns: --- |
114 | * |
115 | * Use: Hashes a buffer of data. The buffer may be of any size and |
116 | * alignment. |
117 | */ |
118 | |
119 | extern void has160_hash(has160_ctx */*ctx*/, |
120 | const void */*buf*/, size_t /*sz*/); |
121 | |
122 | /* --- @has160_done@ --- * |
123 | * |
124 | * Arguments: @has160_ctx *ctx@ = pointer to context block |
125 | * @void *hash@ = pointer to output buffer |
126 | * |
127 | * Returns: --- |
128 | * |
129 | * Use: Returns the hash of the data read so far. |
130 | */ |
131 | |
132 | extern void has160_done(has160_ctx */*ctx*/, void */*hash*/); |
133 | |
134 | /* --- @has160_state@ --- * |
135 | * |
136 | * Arguments: @has160_ctx *ctx@ = pointer to context |
137 | * @void *state@ = pointer to buffer for current state |
138 | * |
139 | * Returns: Number of bytes written to the hash function so far. |
140 | * |
141 | * Use: Returns the current state of the hash function such that |
142 | * it can be passed to @has160_set@. |
143 | */ |
144 | |
145 | extern unsigned long has160_state(has160_ctx */*ctx*/, void */*state*/); |
146 | |
147 | /*----- Generic hash interface --------------------------------------------*/ |
148 | |
149 | extern const gchash has160; |
150 | |
151 | /*----- That's all, folks -------------------------------------------------*/ |
152 | |
153 | #ifdef __cplusplus |
154 | } |
155 | #endif |
156 | |
157 | #endif |