eee16120 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: sha512.c,v 1.1 2000/10/15 17:48:15 mdw Exp $ |
4 | * |
5 | * Implementation of the SHA-512 hash function |
6 | * |
7 | * (c) 2000 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
14 | * Catacomb is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * Catacomb is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with Catacomb; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: sha512.c,v $ |
33 | * Revision 1.1 2000/10/15 17:48:15 mdw |
34 | * New SHA variants with longer outputs. |
35 | * |
36 | */ |
37 | |
38 | /*----- Header files ------------------------------------------------------*/ |
39 | |
40 | #include <mLib/bits.h> |
41 | |
42 | #include "ghash.h" |
43 | #include "ghash-def.h" |
44 | #include "hash.h" |
45 | #include "sha512.h" |
46 | |
47 | /*----- Main code ---------------------------------------------------------*/ |
48 | |
49 | /* --- @sha512_compress@, @sha384_compress@ --- * |
50 | * |
51 | * Arguments: @sha512_ctx *ctx@ = pointer to context block |
52 | * @const void *sbuf@ = pointer to buffer of appropriate size |
53 | * |
54 | * Returns: --- |
55 | * |
56 | * Use: SHA-512 compression function. |
57 | */ |
58 | |
59 | void sha512_compress(sha512_ctx *ctx, const void *sbuf) |
60 | { |
61 | kludge64 a, b, c, d, e, f, g, h; |
62 | kludge64 buf[80]; |
63 | int i; |
64 | |
65 | static const kludge64 K[80] = { |
66 | X64(428a2f98, d728ae22), X64(71374491, 23ef65cd), |
67 | X64(b5c0fbcf, ec4d3b2f), X64(e9b5dba5, 8189dbbc), |
68 | X64(3956c25b, f348b538), X64(59f111f1, b605d019), |
69 | X64(923f82a4, af194f9b), X64(ab1c5ed5, da6d8118), |
70 | X64(d807aa98, a3030242), X64(12835b01, 45706fbe), |
71 | X64(243185be, 4ee4b28c), X64(550c7dc3, d5ffb4e2), |
72 | X64(72be5d74, f27b896f), X64(80deb1fe, 3b1696b1), |
73 | X64(9bdc06a7, 25c71235), X64(c19bf174, cf692694), |
74 | X64(e49b69c1, 9ef14ad2), X64(efbe4786, 384f25e3), |
75 | X64(0fc19dc6, 8b8cd5b5), X64(240ca1cc, 77ac9c65), |
76 | X64(2de92c6f, 592b0275), X64(4a7484aa, 6ea6e483), |
77 | X64(5cb0a9dc, bd41fbd4), X64(76f988da, 831153b5), |
78 | X64(983e5152, ee66dfab), X64(a831c66d, 2db43210), |
79 | X64(b00327c8, 98fb213f), X64(bf597fc7, beef0ee4), |
80 | X64(c6e00bf3, 3da88fc2), X64(d5a79147, 930aa725), |
81 | X64(06ca6351, e003826f), X64(14292967, 0a0e6e70), |
82 | X64(27b70a85, 46d22ffc), X64(2e1b2138, 5c26c926), |
83 | X64(4d2c6dfc, 5ac42aed), X64(53380d13, 9d95b3df), |
84 | X64(650a7354, 8baf63de), X64(766a0abb, 3c77b2a8), |
85 | X64(81c2c92e, 47edaee6), X64(92722c85, 1482353b), |
86 | X64(a2bfe8a1, 4cf10364), X64(a81a664b, bc423001), |
87 | X64(c24b8b70, d0f89791), X64(c76c51a3, 0654be30), |
88 | X64(d192e819, d6ef5218), X64(d6990624, 5565a910), |
89 | X64(f40e3585, 5771202a), X64(106aa070, 32bbd1b8), |
90 | X64(19a4c116, b8d2d0c8), X64(1e376c08, 5141ab53), |
91 | X64(2748774c, df8eeb99), X64(34b0bcb5, e19b48a8), |
92 | X64(391c0cb3, c5c95a63), X64(4ed8aa4a, e3418acb), |
93 | X64(5b9cca4f, 7763e373), X64(682e6ff3, d6b2b8a3), |
94 | X64(748f82ee, 5defb2fc), X64(78a5636f, 43172f60), |
95 | X64(84c87814, a1f0ab72), X64(8cc70208, 1a6439ec), |
96 | X64(90befffa, 23631e28), X64(a4506ceb, de82bde9), |
97 | X64(bef9a3f7, b2c67915), X64(c67178f2, e372532b), |
98 | X64(ca273ece, ea26619c), X64(d186b8c7, 21c0c207), |
99 | X64(eada7dd6, cde0eb1e), X64(f57d4f7f, ee6ed178), |
100 | X64(06f067aa, 72176fba), X64(0a637dc5, a2c898a6), |
101 | X64(113f9804, bef90dae), X64(1b710b35, 131c471b), |
102 | X64(28db77f5, 23047d84), X64(32caab7b, 40c72493), |
103 | X64(3c9ebe0a, 15c9bebc), X64(431d67c4, 9c100d4c), |
104 | X64(4cc5d4be, cb3e42b6), X64(597f299c, fc657e2a), |
105 | X64(5fcb6fab, 3ad6faec), X64(6c44198c, 4a475817) |
106 | }; |
107 | |
108 | /* --- Fetch the chaining variables --- */ |
109 | |
110 | a = ctx->a; |
111 | b = ctx->b; |
112 | c = ctx->c; |
113 | d = ctx->d; |
114 | e = ctx->e; |
115 | f = ctx->f; |
116 | g = ctx->g; |
117 | h = ctx->h; |
118 | |
119 | /* --- Definitions for round functions --- */ |
120 | |
121 | #define CH(d, x, y, z) do { \ |
122 | kludge64 _x; AND64((d), (x), (y)); CPL64(_x, (x)); \ |
123 | AND64(_x, _x, (z)); OR64((d), (d), _x); \ |
124 | } while (0) |
125 | |
126 | #define MAJ(d, x, y, z) do { \ |
127 | kludge64 _x; AND64((d), (x), (y)); AND64(_x, (x), (z)); \ |
128 | OR64((d), (d), _x); AND64(_x, (y), (z)); OR64((d), (d), _x); \ |
129 | } while (0) |
130 | |
131 | #define SIGMA(d, x, i, j, k, last, what) do { \ |
132 | kludge64 _x; ROR64_((d), (x), (i)); ROR64_(_x, (x), (j)); \ |
133 | XOR64((d), (d), _x); last##64_(_x, (x), (k)); XOR64((d), (d), _x); \ |
134 | } while (0) |
135 | |
136 | #define S0(d, x) SIGMA(d, x, 28, 34, 39, ROR, S0); |
137 | #define S1(d, x) SIGMA(d, x, 14, 18, 41, ROR, S1); |
138 | #define s0(d, x) SIGMA(d, x, 1, 8, 7, LSR, s0); |
139 | #define s1(d, x) SIGMA(d, x, 19, 61, 6, LSR, s1); |
140 | |
141 | #define T(a, b, c, d, e, f, g, h, i) do { \ |
142 | kludge64 t1, t2, x; \ |
143 | ADD64(t1, buf[i], K[i]); ADD64(t1, t1, h); \ |
144 | S1(x, e); ADD64(t1, t1, x); CH(x, e, f, g); ADD64(t1, t1, x); \ |
145 | S0(t2, a); MAJ(x, a, b, c); ADD64(t2, t2, x); \ |
146 | ADD64(d, d, t1); ADD64(h, t1, t2); \ |
147 | } while (0) |
148 | |
149 | /* --- Fetch and expand the buffer contents --- */ |
150 | |
151 | { |
152 | const octet *p; |
153 | |
154 | for (i = 0, p = sbuf; i < 16; i++, p += 8) |
155 | LOAD64_(buf[i], p); |
156 | for (i = 16; i < 80; i++) { |
157 | kludge64 x; |
158 | buf[i] = buf[i - 7]; s1(x, buf[i - 2]); ADD64(buf[i], buf[i], x); |
159 | s0(x, buf[i - 15]); ADD64(buf[i], buf[i], x); |
160 | ADD64(buf[i], buf[i], buf[i - 16]); |
161 | } |
162 | } |
163 | |
164 | /* --- The main compression function --- */ |
165 | |
166 | for (i = 0; i < 80; i += 8) { |
167 | T(a, b, c, d, e, f, g, h, i + 0); |
168 | T(h, a, b, c, d, e, f, g, i + 1); |
169 | T(g, h, a, b, c, d, e, f, i + 2); |
170 | T(f, g, h, a, b, c, d, e, i + 3); |
171 | T(e, f, g, h, a, b, c, d, i + 4); |
172 | T(d, e, f, g, h, a, b, c, i + 5); |
173 | T(c, d, e, f, g, h, a, b, i + 6); |
174 | T(b, c, d, e, f, g, h, a, i + 7); |
175 | } |
176 | |
177 | /* --- Update the chaining variables --- */ |
178 | |
179 | ADD64(ctx->a, ctx->a, a); |
180 | ADD64(ctx->b, ctx->b, b); |
181 | ADD64(ctx->c, ctx->c, c); |
182 | ADD64(ctx->d, ctx->d, d); |
183 | ADD64(ctx->e, ctx->e, e); |
184 | ADD64(ctx->f, ctx->f, f); |
185 | ADD64(ctx->g, ctx->g, g); |
186 | ADD64(ctx->h, ctx->h, h); |
187 | } |
188 | |
189 | /* --- @sha512_init@, @sha384_init@ --- * |
190 | * |
191 | * Arguments: @sha512_ctx *ctx@ = pointer to context block to initialize |
192 | * |
193 | * Returns: --- |
194 | * |
195 | * Use: Initializes a context block ready for hashing. |
196 | */ |
197 | |
198 | void sha512_init(sha512_ctx *ctx) |
199 | { |
200 | SET64(ctx->a, 0x6a09e667, 0xf3bcc908); |
201 | SET64(ctx->b, 0xbb67ae85, 0x84caa73b); |
202 | SET64(ctx->c, 0x3c6ef372, 0xfe94f82b); |
203 | SET64(ctx->d, 0xa54ff53a, 0x5f1d36f1); |
204 | SET64(ctx->e, 0x510e527f, 0xade682d1); |
205 | SET64(ctx->f, 0x9b05688c, 0x2b3e6c1f); |
206 | SET64(ctx->g, 0x1f83d9ab, 0xfb41bd6b); |
207 | SET64(ctx->h, 0x5be0cd19, 0x137e2179); |
208 | ctx->off = 0; |
209 | ctx->nh = ctx->nl = 0; |
210 | } |
211 | |
212 | void sha384_init(sha512_ctx *ctx) |
213 | { |
214 | SET64(ctx->a, 0xcbbb9d5d, 0xc1059ed8); |
215 | SET64(ctx->b, 0x629a292a, 0x367cd507); |
216 | SET64(ctx->c, 0x9159015a, 0x3070dd17); |
217 | SET64(ctx->d, 0x152fecd8, 0xf70e5939); |
218 | SET64(ctx->e, 0x67332667, 0xffc00b31); |
219 | SET64(ctx->f, 0x8eb44a87, 0x68581511); |
220 | SET64(ctx->g, 0xdb0c2e0d, 0x64f98fa7); |
221 | SET64(ctx->h, 0x47b5481d, 0xbefa4fa4); |
222 | ctx->off = 0; |
223 | ctx->nh = ctx->nl = 0; |
224 | } |
225 | |
226 | /* --- @sha512_set@, @sha384_set@ --- * |
227 | * |
228 | * Arguments: @sha512_ctx *ctx@ = pointer to context block |
229 | * @const void *buf@ = pointer to state buffer |
230 | * @unsigned long count@ = current count of bytes processed |
231 | * |
232 | * Returns: --- |
233 | * |
234 | * Use: Initializes a context block from a given state. This is |
235 | * useful in cases where the initial hash state is meant to be |
236 | * secret, e.g., for NMAC and HMAC support. |
237 | */ |
238 | |
239 | void sha512_set(sha512_ctx *ctx, const void *buf, unsigned long count) |
240 | { |
241 | const octet *p = buf; |
242 | LOAD64_(ctx->a, p + 0); |
243 | LOAD64_(ctx->b, p + 8); |
244 | LOAD64_(ctx->c, p + 16); |
245 | LOAD64_(ctx->d, p + 24); |
246 | LOAD64_(ctx->e, p + 32); |
247 | LOAD64_(ctx->f, p + 40); |
248 | LOAD64_(ctx->g, p + 48); |
249 | LOAD64_(ctx->h, p + 56); |
250 | ctx->off = 0; |
251 | ctx->nl = U32(count); |
252 | ctx->nh = U32(((count & ~MASK32) >> 16) >> 16); |
253 | } |
254 | |
255 | /* --- @sha512_hash@, @sha384_hash@ --- * |
256 | * |
257 | * Arguments: @sha512_ctx *ctx@ = pointer to context block |
258 | * @const void *buf@ = buffer of data to hash |
259 | * @size_t sz@ = size of buffer to hash |
260 | * |
261 | * Returns: --- |
262 | * |
263 | * Use: Hashes a buffer of data. The buffer may be of any size and |
264 | * alignment. |
265 | */ |
266 | |
267 | void sha512_hash(sha512_ctx *ctx, const void *buf, size_t sz) |
268 | { |
269 | HASH_BUFFER(SHA512, sha512, ctx, buf, sz); |
270 | } |
271 | |
272 | /* --- @sha512_done@, @sha384_done@ --- * |
273 | * |
274 | * Arguments: @sha512_ctx *ctx@ = pointer to context block |
275 | * @void *hash@ = pointer to output buffer |
276 | * |
277 | * Returns: --- |
278 | * |
279 | * Use: Returns the hash of the data read so far. |
280 | */ |
281 | |
282 | static void final(sha512_ctx *ctx) |
283 | { |
284 | HASH_PAD(SHA512, sha512, ctx, 0x80, 0, 16); |
285 | memset(ctx->buf + SHA512_BUFSZ - 16, 0, 8); |
286 | STORE32(ctx->buf + SHA512_BUFSZ - 8, (ctx->nl >> 29) | (ctx->nh << 3)); |
287 | STORE32(ctx->buf + SHA512_BUFSZ - 4, ctx->nl << 3); |
288 | sha512_compress(ctx, ctx->buf); |
289 | } |
290 | |
291 | void sha512_done(sha512_ctx *ctx, void *hash) |
292 | { |
293 | octet *p = hash; |
294 | final(ctx); |
295 | STORE64_(p + 0, ctx->a); |
296 | STORE64_(p + 8, ctx->b); |
297 | STORE64_(p + 16, ctx->c); |
298 | STORE64_(p + 24, ctx->d); |
299 | STORE64_(p + 32, ctx->e); |
300 | STORE64_(p + 40, ctx->f); |
301 | STORE64_(p + 48, ctx->g); |
302 | STORE64_(p + 56, ctx->h); |
303 | } |
304 | |
305 | void sha384_done(sha384_ctx *ctx, void *hash) |
306 | { |
307 | octet *p = hash; |
308 | final(ctx); |
309 | STORE64_(p + 0, ctx->a); |
310 | STORE64_(p + 8, ctx->b); |
311 | STORE64_(p + 16, ctx->c); |
312 | STORE64_(p + 24, ctx->d); |
313 | STORE64_(p + 32, ctx->e); |
314 | STORE64_(p + 40, ctx->f); |
315 | } |
316 | |
317 | /* --- @sha512_state@, @sha384_state@ --- * |
318 | * |
319 | * Arguments: @sha512_ctx *ctx@ = pointer to context |
320 | * @void *state@ = pointer to buffer for current state |
321 | * |
322 | * Returns: Number of bytes written to the hash function so far. |
323 | * |
324 | * Use: Returns the current state of the hash function such that |
325 | * it can be passed to @sha512_set@. |
326 | */ |
327 | |
328 | unsigned long sha512_state(sha512_ctx *ctx, void *state) |
329 | { |
330 | octet *p = state; |
331 | STORE64_(p + 0, ctx->a); |
332 | STORE64_(p + 8, ctx->b); |
333 | STORE64_(p + 16, ctx->c); |
334 | STORE64_(p + 24, ctx->d); |
335 | STORE64_(p + 32, ctx->e); |
336 | STORE64_(p + 40, ctx->f); |
337 | STORE64_(p + 48, ctx->g); |
338 | STORE64_(p + 56, ctx->h); |
339 | return (ctx->nl | ((ctx->nh << 16) << 16)); |
340 | } |
341 | |
342 | /* --- Generic interface --- */ |
343 | |
344 | GHASH_DEF(SHA512, sha512) |
345 | |
346 | /* --- Test code --- */ |
347 | |
348 | HASH_TEST(SHA512, sha512) |
349 | |
350 | /*----- That's all, folks -------------------------------------------------*/ |