Commit | Line | Data |
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eeccf7a8 | 1 | /* -*-c-*- |
2 | * | |
eeccf7a8 | 3 | * The Tiger hash function |
4 | * | |
5 | * (c) 2000 Straylight/Edgeware | |
6 | */ | |
7 | ||
45c0fd36 | 8 | /*----- Licensing notice --------------------------------------------------* |
eeccf7a8 | 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. | |
45c0fd36 | 16 | * |
eeccf7a8 | 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. | |
45c0fd36 | 21 | * |
eeccf7a8 | 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 | ||
eeccf7a8 | 28 | /*----- Header files ------------------------------------------------------*/ |
29 | ||
30 | #include <mLib/bits.h> | |
31 | ||
32 | #include "ghash-def.h" | |
33 | #include "hash.h" | |
34 | #include "tiger.h" | |
35 | #include "tiger-tab.h" | |
36 | #include "tiger-base.h" | |
37 | ||
38 | /*----- S-boxes -----------------------------------------------------------*/ | |
39 | ||
40 | static const kludge64 s[4][256] = TIGER_S; | |
41 | ||
42 | /*----- Main code ---------------------------------------------------------*/ | |
43 | ||
44 | /* --- @tiger_compress@ --- * | |
45 | * | |
46 | * Arguments: @tiger_ctx *ctx@ = pointer to context block | |
47 | * @const void *sbuf@ = pointer to buffer of appropriate size | |
48 | * | |
49 | * Returns: --- | |
50 | * | |
51 | * Use: Tiger compression function. | |
52 | */ | |
53 | ||
54 | void tiger_compress(tiger_ctx *ctx, const void *sbuf) | |
55 | { | |
56 | kludge64 x[8]; | |
57 | int i; | |
58 | const octet *p; | |
59 | for (i = 0, p = sbuf; i < 8; i++, p += 8) | |
60 | LOAD64_L_(x[i], p); | |
61 | TIGER_CORE(ctx->a, ctx->b, ctx->c, x); | |
62 | } | |
63 | ||
64 | /* --- @tiger_init@ --- * | |
65 | * | |
66 | * Arguments: @tiger_ctx *ctx@ = pointer to context block to initialize | |
67 | * | |
68 | * Returns: --- | |
69 | * | |
70 | * Use: Initializes a context block ready for hashing. | |
71 | */ | |
72 | ||
73 | void tiger_init(tiger_ctx *ctx) | |
74 | { | |
75 | SET64(ctx->a, 0x01234567, 0x89abcdef); | |
76 | SET64(ctx->b, 0xfedcba98, 0x76543210); | |
77 | SET64(ctx->c, 0xf096a5b4, 0xc3b2e187); | |
78 | ctx->off = 0; | |
79 | ctx->nl = ctx->nh = 0; | |
80 | } | |
81 | ||
82 | /* --- @tiger_set@ --- * | |
83 | * | |
84 | * Arguments: @tiger_ctx *ctx@ = pointer to context block | |
85 | * @const void *buf@ = pointer to state buffer | |
86 | * @unsigned long count@ = current count of bytes processed | |
87 | * | |
88 | * Returns: --- | |
89 | * | |
90 | * Use: Initializes a context block from a given state. This is | |
91 | * useful in cases where the initial hash state is meant to be | |
92 | * secret, e.g., for NMAC and HMAC support. | |
93 | */ | |
94 | ||
95 | void tiger_set(tiger_ctx *ctx, const void *buf, unsigned long count) | |
96 | { | |
97 | const octet *p = buf; | |
45c0fd36 MW |
98 | LOAD64_L_(ctx->a, p + 0); |
99 | LOAD64_L_(ctx->b, p + 8); | |
eeccf7a8 | 100 | LOAD64_L_(ctx->c, p + 16); |
101 | ctx->off = 0; | |
102 | ctx->nl = U32(count); | |
103 | ctx->nh = U32(((count & ~MASK32) >> 16) >> 16); | |
104 | } | |
105 | ||
106 | /* --- @tiger_hash@ --- * | |
107 | * | |
108 | * Arguments: @tiger_ctx *ctx@ = pointer to context block | |
109 | * @const void *buf@ = buffer of data to hash | |
110 | * @size_t sz@ = size of buffer to hash | |
111 | * | |
112 | * Returns: --- | |
113 | * | |
114 | * Use: Hashes a buffer of data. The buffer may be of any size and | |
115 | * alignment. | |
116 | */ | |
117 | ||
118 | void tiger_hash(tiger_ctx *ctx, const void *buf, size_t sz) | |
119 | { | |
120 | HASH_BUFFER(TIGER, tiger, ctx, buf, sz); | |
121 | } | |
122 | ||
123 | /* --- @tiger_done@ --- * | |
124 | * | |
125 | * Arguments: @tiger_ctx *ctx@ = pointer to context block | |
126 | * @void *hash@ = pointer to output buffer | |
127 | * | |
128 | * Returns: --- | |
129 | * | |
130 | * Use: Returns the hash of the data read so far. | |
131 | */ | |
132 | ||
133 | void tiger_done(tiger_ctx *ctx, void *hash) | |
134 | { | |
135 | octet *p = hash; | |
136 | HASH_PAD(TIGER, tiger, ctx, 0x01u, 0, 8); | |
137 | STORE32_L(ctx->buf + TIGER_BUFSZ - 8, ctx->nl << 3); | |
138 | STORE32_L(ctx->buf + TIGER_BUFSZ - 4, (ctx->nl >> 29) | (ctx->nh << 3)); | |
139 | tiger_compress(ctx, ctx->buf); | |
140 | STORE64_L_(p + 0, ctx->a); | |
141 | STORE64_L_(p + 8, ctx->b); | |
142 | STORE64_L_(p + 16, ctx->c); | |
143 | } | |
144 | ||
145 | /* --- @tiger_state@ --- * | |
146 | * | |
147 | * Arguments: @tiger_ctx *ctx@ = pointer to context | |
148 | * @void *state@ = pointer to buffer for current state | |
149 | * | |
150 | * Returns: Number of bytes written to the hash function so far. | |
151 | * | |
152 | * Use: Returns the current state of the hash function such that | |
153 | * it can be passed to @tiger_set@. | |
154 | */ | |
155 | ||
156 | unsigned long tiger_state(tiger_ctx *ctx, void *state) | |
157 | { | |
158 | octet *p = state; | |
159 | STORE64_L_(p + 0, ctx->a); | |
160 | STORE64_L_(p + 8, ctx->b); | |
161 | STORE64_L_(p + 16, ctx->c); | |
162 | return (ctx->nl | ((ctx->nh << 16) << 16)); | |
163 | } | |
164 | ||
165 | /* --- Generic interface --- */ | |
166 | ||
167 | GHASH_DEF(TIGER, tiger) | |
168 | ||
169 | /* --- Test code --- */ | |
170 | ||
171 | HASH_TEST(TIGER, tiger) | |
172 | ||
173 | /*----- That's all, folks -------------------------------------------------*/ |