source: trunk/minix/drivers/random/sha2.c@ 11

Last change on this file since 11 was 9, checked in by Mattia Monga, 14 years ago

Minix 3.1.2a
File size: 31.8 KB
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1/* $FreeBSD: src/sys/crypto/sha2/sha2.c,v 1.2.2.2 2002/03/05 08:36:47 ume Exp $ */
2/* $KAME: sha2.c,v 1.8 2001/11/08 01:07:52 itojun Exp $ */
3
4/*
5 * sha2.c
6 *
7 * Version 1.0.0beta1
8 *
9 * Written by Aaron D. Gifford <me@aarongifford.com>
10 *
11 * Copyright 2000 Aaron D. Gifford. All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the copyright holder nor the names of contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTOR(S) BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 */
38
39#include <sys/types.h>
40/* #include <sys/time.h> */
41/* #include <sys/systm.h> */
42/* #include <machine/endian.h> */
43#include "sha2.h"
44
45/*
46 * ASSERT NOTE:
47 * Some sanity checking code is included using assert(). On my FreeBSD
48 * system, this additional code can be removed by compiling with NDEBUG
49 * defined. Check your own systems manpage on assert() to see how to
50 * compile WITHOUT the sanity checking code on your system.
51 *
52 * UNROLLED TRANSFORM LOOP NOTE:
53 * You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform
54 * loop version for the hash transform rounds (defined using macros
55 * later in this file). Either define on the command line, for example:
56 *
57 * cc -DSHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c
58 *
59 * or define below:
60 *
61 * #define SHA2_UNROLL_TRANSFORM
62 *
63 */
64
65#if defined(__bsdi__) || defined(__FreeBSD__)
66#define assert(x)
67#endif
68
69/*** SHA-256/384/512 Machine Architecture Definitions *****************/
70/*
71 * SHA2_BYTE_ORDER NOTE:
72 *
73 * Please make sure that your system defines SHA2_BYTE_ORDER. If your
74 * architecture is little-endian, make sure it also defines
75 * SHA2_LITTLE_ENDIAN and that the two (SHA2_BYTE_ORDER and SHA2_LITTLE_ENDIAN) are
76 * equivilent.
77 *
78 * If your system does not define the above, then you can do so by
79 * hand like this:
80 *
81 * #define SHA2_LITTLE_ENDIAN 1234
82 * #define SHA2_BIG_ENDIAN 4321
83 *
84 * And for little-endian machines, add:
85 *
86 * #define SHA2_BYTE_ORDER SHA2_LITTLE_ENDIAN
87 *
88 * Or for big-endian machines:
89 *
90 * #define SHA2_BYTE_ORDER SHA2_BIG_ENDIAN
91 *
92 * The FreeBSD machine this was written on defines BYTE_ORDER
93 * appropriately by including <sys/types.h> (which in turn includes
94 * <machine/endian.h> where the appropriate definitions are actually
95 * made).
96 */
97#if !defined(SHA2_BYTE_ORDER) || (SHA2_BYTE_ORDER != SHA2_LITTLE_ENDIAN && SHA2_BYTE_ORDER != SHA2_BIG_ENDIAN)
98#error Define SHA2_BYTE_ORDER to be equal to either SHA2_LITTLE_ENDIAN or SHA2_BIG_ENDIAN
99#endif
100
101/*
102 * Define the followingsha2_* types to types of the correct length on
103 * the native archtecture. Most BSD systems and Linux define u_intXX_t
104 * types. Machines with very recent ANSI C headers, can use the
105 * uintXX_t definintions from inttypes.h by defining SHA2_USE_INTTYPES_H
106 * during compile or in the sha.h header file.
107 *
108 * Machines that support neither u_intXX_t nor inttypes.h's uintXX_t
109 * will need to define these three typedefs below (and the appropriate
110 * ones in sha.h too) by hand according to their system architecture.
111 *
112 * Thank you, Jun-ichiro itojun Hagino, for suggesting using u_intXX_t
113 * types and pointing out recent ANSI C support for uintXX_t in inttypes.h.
114 */
115#if 0 /*def SHA2_USE_INTTYPES_H*/
116
117typedef uint8_t sha2_byte; /* Exactly 1 byte */
118typedef uint32_t sha2_word32; /* Exactly 4 bytes */
119typedef uint64_t sha2_word64; /* Exactly 8 bytes */
120
121#else /* SHA2_USE_INTTYPES_H */
122
123typedef u_int8_t sha2_byte; /* Exactly 1 byte */
124typedef u_int32_t sha2_word32; /* Exactly 4 bytes */
125typedef u_int64_t sha2_word64; /* Exactly 8 bytes */
126
127#endif /* SHA2_USE_INTTYPES_H */
128
129/*** SHA-256/384/512 Various Length Definitions ***********************/
130/* NOTE: Most of these are in sha2.h */
131#define SHA256_SHORT_BLOCK_LENGTH (SHA256_BLOCK_LENGTH - 8)
132#define SHA384_SHORT_BLOCK_LENGTH (SHA384_BLOCK_LENGTH - 16)
133#define SHA512_SHORT_BLOCK_LENGTH (SHA512_BLOCK_LENGTH - 16)
134
135/*** ENDIAN REVERSAL MACROS *******************************************/
136#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
137#define REVERSE32(w,x) { \
138 sha2_word32 tmp = (w); \
139 tmp = (tmp >> 16) | (tmp << 16); \
140 (x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \
141}
142#define REVERSE64(w,x) { \
143 sha2_word64 tmp = (w); \
144 tmp = (tmp >> 32) | (tmp << 32); \
145 tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
146 ((tmp & 0x00ff00ff00ff00ffULL) << 8); \
147 (x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \
148 ((tmp & 0x0000ffff0000ffffULL) << 16); \
149}
150#if MINIX_64BIT
151#undef REVERSE64
152#define REVERSE64(w,x) { \
153 u32_t hi, lo; \
154 REVERSE32(ex64hi((w)), lo); \
155 REVERSE32(ex64lo((w)), hi); \
156 (x) = make64(lo, hi); \
157}
158#endif /* MINIX_64BIT */
159#endif /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
160
161/*
162 * Macro for incrementally adding the unsigned 64-bit integer n to the
163 * unsigned 128-bit integer (represented using a two-element array of
164 * 64-bit words):
165 */
166#define ADDINC128(w,n) { \
167 (w)[0] += (sha2_word64)(n); \
168 if ((w)[0] < (n)) { \
169 (w)[1]++; \
170 } \
171}
172
173/*** THE SIX LOGICAL FUNCTIONS ****************************************/
174/*
175 * Bit shifting and rotation (used by the six SHA-XYZ logical functions:
176 *
177 * NOTE: The naming of R and S appears backwards here (R is a SHIFT and
178 * S is a ROTATION) because the SHA-256/384/512 description document
179 * (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this
180 * same "backwards" definition.
181 */
182/* Shift-right (used in SHA-256, SHA-384, and SHA-512): */
183#define R(b,x) ((x) >> (b))
184/* 32-bit Rotate-right (used in SHA-256): */
185#define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b))))
186/* 64-bit Rotate-right (used in SHA-384 and SHA-512): */
187#define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b))))
188
189/* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */
190#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z)))
191#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
192
193/* Four of six logical functions used in SHA-256: */
194#define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x)))
195#define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x)))
196#define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x)))
197#define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x)))
198
199/* Four of six logical functions used in SHA-384 and SHA-512: */
200#define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x)))
201#define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x)))
202#define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x)))
203#define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x)))
204
205/*** INTERNAL FUNCTION PROTOTYPES *************************************/
206/* NOTE: These should not be accessed directly from outside this
207 * library -- they are intended for private internal visibility/use
208 * only.
209 */
210void SHA512_Last(SHA512_CTX*);
211void SHA256_Transform(SHA256_CTX*, const sha2_word32*);
212void SHA512_Transform(SHA512_CTX*, const sha2_word64*);
213
214/*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/
215/* Hash constant words K for SHA-256: */
216const static sha2_word32 K256[64] = {
217 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL,
218 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL,
219 0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL,
220 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL,
221 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL,
222 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL,
223 0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL,
224 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL,
225 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL,
226 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL,
227 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL,
228 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL,
229 0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL,
230 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL,
231 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL,
232 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL
233};
234
235/* Initial hash value H for SHA-256: */
236const static sha2_word32 sha256_initial_hash_value[8] = {
237 0x6a09e667UL,
238 0xbb67ae85UL,
239 0x3c6ef372UL,
240 0xa54ff53aUL,
241 0x510e527fUL,
242 0x9b05688cUL,
243 0x1f83d9abUL,
244 0x5be0cd19UL
245};
246
247#if !NO_64BIT
248/* Hash constant words K for SHA-384 and SHA-512: */
249const static sha2_word64 K512[80] = {
250 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL,
251 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL,
252 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL,
253 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL,
254 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL,
255 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL,
256 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL,
257 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL,
258 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL,
259 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL,
260 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL,
261 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL,
262 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL,
263 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL,
264 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL,
265 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL,
266 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL,
267 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL,
268 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL,
269 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL,
270 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL,
271 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL,
272 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL,
273 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL,
274 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL,
275 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL,
276 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL,
277 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL,
278 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL,
279 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL,
280 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL,
281 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL,
282 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL,
283 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL,
284 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL,
285 0x113f9804bef90daeULL, 0x1b710b35131c471bULL,
286 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL,
287 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL,
288 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL,
289 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL
290};
291
292/* Initial hash value H for SHA-384 */
293const static sha2_word64 sha384_initial_hash_value[8] = {
294 0xcbbb9d5dc1059ed8ULL,
295 0x629a292a367cd507ULL,
296 0x9159015a3070dd17ULL,
297 0x152fecd8f70e5939ULL,
298 0x67332667ffc00b31ULL,
299 0x8eb44a8768581511ULL,
300 0xdb0c2e0d64f98fa7ULL,
301 0x47b5481dbefa4fa4ULL
302};
303
304/* Initial hash value H for SHA-512 */
305const static sha2_word64 sha512_initial_hash_value[8] = {
306 0x6a09e667f3bcc908ULL,
307 0xbb67ae8584caa73bULL,
308 0x3c6ef372fe94f82bULL,
309 0xa54ff53a5f1d36f1ULL,
310 0x510e527fade682d1ULL,
311 0x9b05688c2b3e6c1fULL,
312 0x1f83d9abfb41bd6bULL,
313 0x5be0cd19137e2179ULL
314};
315#endif /* !NO_64BIT */
316
317/*
318 * Constant used by SHA256/384/512_End() functions for converting the
319 * digest to a readable hexadecimal character string:
320 */
321static const char *sha2_hex_digits = "0123456789abcdef";
322
323/*** SHA-256: *********************************************************/
324void SHA256_Init(SHA256_CTX* context) {
325 if (context == (SHA256_CTX*)0) {
326 return;
327 }
328 bcopy(sha256_initial_hash_value, context->state, SHA256_DIGEST_LENGTH);
329 bzero(context->buffer, SHA256_BLOCK_LENGTH);
330#if MINIX_64BIT
331 context->bitcount= cvu64(0);
332#else /* !MINIX_64BIT */
333 context->bitcount = 0;
334#endif /* MINIX_64BIT */
335}
336
337#ifdef SHA2_UNROLL_TRANSFORM
338
339/* Unrolled SHA-256 round macros: */
340
341#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
342
343#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
344 REVERSE32(*data++, W256[j]); \
345 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
346 K256[j] + W256[j]; \
347 (d) += T1; \
348 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
349 j++
350
351#else /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
352
353#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \
354 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \
355 K256[j] + (W256[j] = *data++); \
356 (d) += T1; \
357 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
358 j++
359
360#endif /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
361
362#define ROUND256(a,b,c,d,e,f,g,h) \
363 s0 = W256[(j+1)&0x0f]; \
364 s0 = sigma0_256(s0); \
365 s1 = W256[(j+14)&0x0f]; \
366 s1 = sigma1_256(s1); \
367 T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[j] + \
368 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \
369 (d) += T1; \
370 (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \
371 j++
372
373void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
374 sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
375 sha2_word32 T1, *W256;
376 int j;
377
378 W256 = (sha2_word32*)context->buffer;
379
380 /* Initialize registers with the prev. intermediate value */
381 a = context->state[0];
382 b = context->state[1];
383 c = context->state[2];
384 d = context->state[3];
385 e = context->state[4];
386 f = context->state[5];
387 g = context->state[6];
388 h = context->state[7];
389
390 j = 0;
391 do {
392 /* Rounds 0 to 15 (unrolled): */
393 ROUND256_0_TO_15(a,b,c,d,e,f,g,h);
394 ROUND256_0_TO_15(h,a,b,c,d,e,f,g);
395 ROUND256_0_TO_15(g,h,a,b,c,d,e,f);
396 ROUND256_0_TO_15(f,g,h,a,b,c,d,e);
397 ROUND256_0_TO_15(e,f,g,h,a,b,c,d);
398 ROUND256_0_TO_15(d,e,f,g,h,a,b,c);
399 ROUND256_0_TO_15(c,d,e,f,g,h,a,b);
400 ROUND256_0_TO_15(b,c,d,e,f,g,h,a);
401 } while (j < 16);
402
403 /* Now for the remaining rounds to 64: */
404 do {
405 ROUND256(a,b,c,d,e,f,g,h);
406 ROUND256(h,a,b,c,d,e,f,g);
407 ROUND256(g,h,a,b,c,d,e,f);
408 ROUND256(f,g,h,a,b,c,d,e);
409 ROUND256(e,f,g,h,a,b,c,d);
410 ROUND256(d,e,f,g,h,a,b,c);
411 ROUND256(c,d,e,f,g,h,a,b);
412 ROUND256(b,c,d,e,f,g,h,a);
413 } while (j < 64);
414
415 /* Compute the current intermediate hash value */
416 context->state[0] += a;
417 context->state[1] += b;
418 context->state[2] += c;
419 context->state[3] += d;
420 context->state[4] += e;
421 context->state[5] += f;
422 context->state[6] += g;
423 context->state[7] += h;
424
425 /* Clean up */
426 a = b = c = d = e = f = g = h = T1 = 0;
427}
428
429#else /* SHA2_UNROLL_TRANSFORM */
430
431void SHA256_Transform(SHA256_CTX* context, const sha2_word32* data) {
432 sha2_word32 a, b, c, d, e, f, g, h, s0, s1;
433 sha2_word32 T1, T2, *W256;
434 int j;
435
436 W256 = (sha2_word32*)context->buffer;
437
438 /* Initialize registers with the prev. intermediate value */
439 a = context->state[0];
440 b = context->state[1];
441 c = context->state[2];
442 d = context->state[3];
443 e = context->state[4];
444 f = context->state[5];
445 g = context->state[6];
446 h = context->state[7];
447
448 j = 0;
449 do {
450#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
451 /* Copy data while converting to host byte order */
452 REVERSE32(*data++,W256[j]);
453 /* Apply the SHA-256 compression function to update a..h */
454 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j];
455#else /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
456 /* Apply the SHA-256 compression function to update a..h with copy */
457 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + (W256[j] = *data++);
458#endif /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
459 T2 = Sigma0_256(a) + Maj(a, b, c);
460 h = g;
461 g = f;
462 f = e;
463 e = d + T1;
464 d = c;
465 c = b;
466 b = a;
467 a = T1 + T2;
468
469 j++;
470 } while (j < 16);
471
472 do {
473 /* Part of the message block expansion: */
474 s0 = W256[(j+1)&0x0f];
475 s0 = sigma0_256(s0);
476 s1 = W256[(j+14)&0x0f];
477 s1 = sigma1_256(s1);
478
479 /* Apply the SHA-256 compression function to update a..h */
480 T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] +
481 (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0);
482 T2 = Sigma0_256(a) + Maj(a, b, c);
483 h = g;
484 g = f;
485 f = e;
486 e = d + T1;
487 d = c;
488 c = b;
489 b = a;
490 a = T1 + T2;
491
492 j++;
493 } while (j < 64);
494
495 /* Compute the current intermediate hash value */
496 context->state[0] += a;
497 context->state[1] += b;
498 context->state[2] += c;
499 context->state[3] += d;
500 context->state[4] += e;
501 context->state[5] += f;
502 context->state[6] += g;
503 context->state[7] += h;
504
505 /* Clean up */
506 a = b = c = d = e = f = g = h = T1 = T2 = 0;
507}
508
509#endif /* SHA2_UNROLL_TRANSFORM */
510
511void SHA256_Update(SHA256_CTX* context, const sha2_byte *data, size_t len) {
512 unsigned int freespace, usedspace;
513
514 if (len == 0) {
515 /* Calling with no data is valid - we do nothing */
516 return;
517 }
518
519 /* Sanity check: */
520 assert(context != (SHA256_CTX*)0 && data != (sha2_byte*)0);
521
522#if MINIX_64BIT
523 usedspace= rem64u(context->bitcount, SHA256_BLOCK_LENGTH*8)/8;
524#else /* !MINIX_64BIT */
525 usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
526#endif /* MINIX_64BIT */
527 if (usedspace > 0) {
528 /* Calculate how much free space is available in the buffer */
529 freespace = SHA256_BLOCK_LENGTH - usedspace;
530
531 if (len >= freespace) {
532 /* Fill the buffer completely and process it */
533 bcopy(data, &context->buffer[usedspace], freespace);
534#if MINIX_64BIT
535 context->bitcount= add64u(context->bitcount,
536 freespace << 3);
537#else /* !MINIX_64BIT */
538 context->bitcount += freespace << 3;
539#endif /* MINIX_64BIT */
540 len -= freespace;
541 data += freespace;
542 SHA256_Transform(context, (sha2_word32*)context->buffer);
543 } else {
544 /* The buffer is not yet full */
545 bcopy(data, &context->buffer[usedspace], len);
546#if MINIX_64BIT
547 context->bitcount= add64u(context->bitcount, len << 3);
548#else /* !MINIX_64BIT */
549 context->bitcount += len << 3;
550#endif /* MINIX_64BIT */
551 /* Clean up: */
552 usedspace = freespace = 0;
553 return;
554 }
555 }
556 while (len >= SHA256_BLOCK_LENGTH) {
557 /* Process as many complete blocks as we can */
558 SHA256_Transform(context, (const sha2_word32*)data);
559#if MINIX_64BIT
560 context->bitcount= add64u(context->bitcount,
561 SHA256_BLOCK_LENGTH << 3);
562#else /* !MINIX_64BIT */
563 context->bitcount += SHA256_BLOCK_LENGTH << 3;
564#endif /* MINIX_64BIT */
565 len -= SHA256_BLOCK_LENGTH;
566 data += SHA256_BLOCK_LENGTH;
567 }
568 if (len > 0) {
569 /* There's left-overs, so save 'em */
570 bcopy(data, context->buffer, len);
571#if MINIX_64BIT
572 context->bitcount= add64u(context->bitcount, len << 3);
573#else /* !MINIX_64BIT */
574 context->bitcount += len << 3;
575#endif /* MINIX_64BIT */
576 }
577 /* Clean up: */
578 usedspace = freespace = 0;
579}
580
581void SHA256_Final(sha2_byte digest[], SHA256_CTX* context) {
582 sha2_word32 *d = (sha2_word32*)digest;
583 unsigned int usedspace;
584
585 /* Sanity check: */
586 assert(context != (SHA256_CTX*)0);
587
588 /* If no digest buffer is passed, we don't bother doing this: */
589 if (digest != (sha2_byte*)0) {
590#if MINIX_64BIT
591 usedspace= rem64u(context->bitcount, SHA256_BLOCK_LENGTH*8)/8;
592#else /* !MINIX_64BIT */
593 usedspace = (context->bitcount >> 3) % SHA256_BLOCK_LENGTH;
594#endif /* MINIX_64BIT */
595#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
596 /* Convert FROM host byte order */
597 REVERSE64(context->bitcount,context->bitcount);
598#endif
599 if (usedspace > 0) {
600 /* Begin padding with a 1 bit: */
601 context->buffer[usedspace++] = 0x80;
602
603 if (usedspace <= SHA256_SHORT_BLOCK_LENGTH) {
604 /* Set-up for the last transform: */
605 bzero(&context->buffer[usedspace], SHA256_SHORT_BLOCK_LENGTH - usedspace);
606 } else {
607 if (usedspace < SHA256_BLOCK_LENGTH) {
608 bzero(&context->buffer[usedspace], SHA256_BLOCK_LENGTH - usedspace);
609 }
610 /* Do second-to-last transform: */
611 SHA256_Transform(context, (sha2_word32*)context->buffer);
612
613 /* And set-up for the last transform: */
614 bzero(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
615 }
616 } else {
617 /* Set-up for the last transform: */
618 bzero(context->buffer, SHA256_SHORT_BLOCK_LENGTH);
619
620 /* Begin padding with a 1 bit: */
621 *context->buffer = 0x80;
622 }
623 /* Set the bit count: */
624 *(sha2_word64*)&context->buffer[SHA256_SHORT_BLOCK_LENGTH] = context->bitcount;
625
626 /* Final transform: */
627 SHA256_Transform(context, (sha2_word32*)context->buffer);
628
629#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
630 {
631 /* Convert TO host byte order */
632 int j;
633 for (j = 0; j < 8; j++) {
634 REVERSE32(context->state[j],context->state[j]);
635 *d++ = context->state[j];
636 }
637 }
638#else
639 bcopy(context->state, d, SHA256_DIGEST_LENGTH);
640#endif
641 }
642
643 /* Clean up state data: */
644 bzero(context, sizeof(context));
645 usedspace = 0;
646}
647
648char *SHA256_End(SHA256_CTX* context, char buffer[]) {
649 sha2_byte digest[SHA256_DIGEST_LENGTH], *d = digest;
650 int i;
651
652 /* Sanity check: */
653 assert(context != (SHA256_CTX*)0);
654
655 if (buffer != (char*)0) {
656 SHA256_Final(digest, context);
657
658 for (i = 0; i < SHA256_DIGEST_LENGTH; i++) {
659 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
660 *buffer++ = sha2_hex_digits[*d & 0x0f];
661 d++;
662 }
663 *buffer = (char)0;
664 } else {
665 bzero(context, sizeof(context));
666 }
667 bzero(digest, SHA256_DIGEST_LENGTH);
668 return buffer;
669}
670
671char* SHA256_Data(const sha2_byte* data, size_t len, char digest[SHA256_DIGEST_STRING_LENGTH]) {
672 SHA256_CTX context;
673
674 SHA256_Init(&context);
675 SHA256_Update(&context, data, len);
676 return SHA256_End(&context, digest);
677}
678
679#if !NO_64BIT
680
681/*** SHA-512: *********************************************************/
682void SHA512_Init(SHA512_CTX* context) {
683 if (context == (SHA512_CTX*)0) {
684 return;
685 }
686 bcopy(sha512_initial_hash_value, context->state, SHA512_DIGEST_LENGTH);
687 bzero(context->buffer, SHA512_BLOCK_LENGTH);
688 context->bitcount[0] = context->bitcount[1] = 0;
689}
690
691#ifdef SHA2_UNROLL_TRANSFORM
692
693/* Unrolled SHA-512 round macros: */
694#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
695
696#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
697 REVERSE64(*data++, W512[j]); \
698 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
699 K512[j] + W512[j]; \
700 (d) += T1, \
701 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)), \
702 j++
703
704#else /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
705
706#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \
707 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \
708 K512[j] + (W512[j] = *data++); \
709 (d) += T1; \
710 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
711 j++
712
713#endif /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
714
715#define ROUND512(a,b,c,d,e,f,g,h) \
716 s0 = W512[(j+1)&0x0f]; \
717 s0 = sigma0_512(s0); \
718 s1 = W512[(j+14)&0x0f]; \
719 s1 = sigma1_512(s1); \
720 T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[j] + \
721 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \
722 (d) += T1; \
723 (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \
724 j++
725
726void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
727 sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
728 sha2_word64 T1, *W512 = (sha2_word64*)context->buffer;
729 int j;
730
731 /* Initialize registers with the prev. intermediate value */
732 a = context->state[0];
733 b = context->state[1];
734 c = context->state[2];
735 d = context->state[3];
736 e = context->state[4];
737 f = context->state[5];
738 g = context->state[6];
739 h = context->state[7];
740
741 j = 0;
742 do {
743 ROUND512_0_TO_15(a,b,c,d,e,f,g,h);
744 ROUND512_0_TO_15(h,a,b,c,d,e,f,g);
745 ROUND512_0_TO_15(g,h,a,b,c,d,e,f);
746 ROUND512_0_TO_15(f,g,h,a,b,c,d,e);
747 ROUND512_0_TO_15(e,f,g,h,a,b,c,d);
748 ROUND512_0_TO_15(d,e,f,g,h,a,b,c);
749 ROUND512_0_TO_15(c,d,e,f,g,h,a,b);
750 ROUND512_0_TO_15(b,c,d,e,f,g,h,a);
751 } while (j < 16);
752
753 /* Now for the remaining rounds up to 79: */
754 do {
755 ROUND512(a,b,c,d,e,f,g,h);
756 ROUND512(h,a,b,c,d,e,f,g);
757 ROUND512(g,h,a,b,c,d,e,f);
758 ROUND512(f,g,h,a,b,c,d,e);
759 ROUND512(e,f,g,h,a,b,c,d);
760 ROUND512(d,e,f,g,h,a,b,c);
761 ROUND512(c,d,e,f,g,h,a,b);
762 ROUND512(b,c,d,e,f,g,h,a);
763 } while (j < 80);
764
765 /* Compute the current intermediate hash value */
766 context->state[0] += a;
767 context->state[1] += b;
768 context->state[2] += c;
769 context->state[3] += d;
770 context->state[4] += e;
771 context->state[5] += f;
772 context->state[6] += g;
773 context->state[7] += h;
774
775 /* Clean up */
776 a = b = c = d = e = f = g = h = T1 = 0;
777}
778
779#else /* SHA2_UNROLL_TRANSFORM */
780
781void SHA512_Transform(SHA512_CTX* context, const sha2_word64* data) {
782 sha2_word64 a, b, c, d, e, f, g, h, s0, s1;
783 sha2_word64 T1, T2, *W512 = (sha2_word64*)context->buffer;
784 int j;
785
786 /* Initialize registers with the prev. intermediate value */
787 a = context->state[0];
788 b = context->state[1];
789 c = context->state[2];
790 d = context->state[3];
791 e = context->state[4];
792 f = context->state[5];
793 g = context->state[6];
794 h = context->state[7];
795
796 j = 0;
797 do {
798#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
799 /* Convert TO host byte order */
800 REVERSE64(*data++, W512[j]);
801 /* Apply the SHA-512 compression function to update a..h */
802 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j];
803#else /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
804 /* Apply the SHA-512 compression function to update a..h with copy */
805 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + (W512[j] = *data++);
806#endif /* SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN */
807 T2 = Sigma0_512(a) + Maj(a, b, c);
808 h = g;
809 g = f;
810 f = e;
811 e = d + T1;
812 d = c;
813 c = b;
814 b = a;
815 a = T1 + T2;
816
817 j++;
818 } while (j < 16);
819
820 do {
821 /* Part of the message block expansion: */
822 s0 = W512[(j+1)&0x0f];
823 s0 = sigma0_512(s0);
824 s1 = W512[(j+14)&0x0f];
825 s1 = sigma1_512(s1);
826
827 /* Apply the SHA-512 compression function to update a..h */
828 T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] +
829 (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0);
830 T2 = Sigma0_512(a) + Maj(a, b, c);
831 h = g;
832 g = f;
833 f = e;
834 e = d + T1;
835 d = c;
836 c = b;
837 b = a;
838 a = T1 + T2;
839
840 j++;
841 } while (j < 80);
842
843 /* Compute the current intermediate hash value */
844 context->state[0] += a;
845 context->state[1] += b;
846 context->state[2] += c;
847 context->state[3] += d;
848 context->state[4] += e;
849 context->state[5] += f;
850 context->state[6] += g;
851 context->state[7] += h;
852
853 /* Clean up */
854 a = b = c = d = e = f = g = h = T1 = T2 = 0;
855}
856
857#endif /* SHA2_UNROLL_TRANSFORM */
858
859void SHA512_Update(SHA512_CTX* context, const sha2_byte *data, size_t len) {
860 unsigned int freespace, usedspace;
861
862 if (len == 0) {
863 /* Calling with no data is valid - we do nothing */
864 return;
865 }
866
867 /* Sanity check: */
868 assert(context != (SHA512_CTX*)0 && data != (sha2_byte*)0);
869
870 usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
871 if (usedspace > 0) {
872 /* Calculate how much free space is available in the buffer */
873 freespace = SHA512_BLOCK_LENGTH - usedspace;
874
875 if (len >= freespace) {
876 /* Fill the buffer completely and process it */
877 bcopy(data, &context->buffer[usedspace], freespace);
878 ADDINC128(context->bitcount, freespace << 3);
879 len -= freespace;
880 data += freespace;
881 SHA512_Transform(context, (sha2_word64*)context->buffer);
882 } else {
883 /* The buffer is not yet full */
884 bcopy(data, &context->buffer[usedspace], len);
885 ADDINC128(context->bitcount, len << 3);
886 /* Clean up: */
887 usedspace = freespace = 0;
888 return;
889 }
890 }
891 while (len >= SHA512_BLOCK_LENGTH) {
892 /* Process as many complete blocks as we can */
893 SHA512_Transform(context, (const sha2_word64*)data);
894 ADDINC128(context->bitcount, SHA512_BLOCK_LENGTH << 3);
895 len -= SHA512_BLOCK_LENGTH;
896 data += SHA512_BLOCK_LENGTH;
897 }
898 if (len > 0) {
899 /* There's left-overs, so save 'em */
900 bcopy(data, context->buffer, len);
901 ADDINC128(context->bitcount, len << 3);
902 }
903 /* Clean up: */
904 usedspace = freespace = 0;
905}
906
907void SHA512_Last(SHA512_CTX* context) {
908 unsigned int usedspace;
909
910 usedspace = (context->bitcount[0] >> 3) % SHA512_BLOCK_LENGTH;
911#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
912 /* Convert FROM host byte order */
913 REVERSE64(context->bitcount[0],context->bitcount[0]);
914 REVERSE64(context->bitcount[1],context->bitcount[1]);
915#endif
916 if (usedspace > 0) {
917 /* Begin padding with a 1 bit: */
918 context->buffer[usedspace++] = 0x80;
919
920 if (usedspace <= SHA512_SHORT_BLOCK_LENGTH) {
921 /* Set-up for the last transform: */
922 bzero(&context->buffer[usedspace], SHA512_SHORT_BLOCK_LENGTH - usedspace);
923 } else {
924 if (usedspace < SHA512_BLOCK_LENGTH) {
925 bzero(&context->buffer[usedspace], SHA512_BLOCK_LENGTH - usedspace);
926 }
927 /* Do second-to-last transform: */
928 SHA512_Transform(context, (sha2_word64*)context->buffer);
929
930 /* And set-up for the last transform: */
931 bzero(context->buffer, SHA512_BLOCK_LENGTH - 2);
932 }
933 } else {
934 /* Prepare for final transform: */
935 bzero(context->buffer, SHA512_SHORT_BLOCK_LENGTH);
936
937 /* Begin padding with a 1 bit: */
938 *context->buffer = 0x80;
939 }
940 /* Store the length of input data (in bits): */
941 *(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH] = context->bitcount[1];
942 *(sha2_word64*)&context->buffer[SHA512_SHORT_BLOCK_LENGTH+8] = context->bitcount[0];
943
944 /* Final transform: */
945 SHA512_Transform(context, (sha2_word64*)context->buffer);
946}
947
948void SHA512_Final(sha2_byte digest[], SHA512_CTX* context) {
949 sha2_word64 *d = (sha2_word64*)digest;
950
951 /* Sanity check: */
952 assert(context != (SHA512_CTX*)0);
953
954 /* If no digest buffer is passed, we don't bother doing this: */
955 if (digest != (sha2_byte*)0) {
956 SHA512_Last(context);
957
958 /* Save the hash data for output: */
959#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
960 {
961 /* Convert TO host byte order */
962 int j;
963 for (j = 0; j < 8; j++) {
964 REVERSE64(context->state[j],context->state[j]);
965 *d++ = context->state[j];
966 }
967 }
968#else
969 bcopy(context->state, d, SHA512_DIGEST_LENGTH);
970#endif
971 }
972
973 /* Zero out state data */
974 bzero(context, sizeof(context));
975}
976
977char *SHA512_End(SHA512_CTX* context, char buffer[]) {
978 sha2_byte digest[SHA512_DIGEST_LENGTH], *d = digest;
979 int i;
980
981 /* Sanity check: */
982 assert(context != (SHA512_CTX*)0);
983
984 if (buffer != (char*)0) {
985 SHA512_Final(digest, context);
986
987 for (i = 0; i < SHA512_DIGEST_LENGTH; i++) {
988 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
989 *buffer++ = sha2_hex_digits[*d & 0x0f];
990 d++;
991 }
992 *buffer = (char)0;
993 } else {
994 bzero(context, sizeof(context));
995 }
996 bzero(digest, SHA512_DIGEST_LENGTH);
997 return buffer;
998}
999
1000char* SHA512_Data(const sha2_byte* data, size_t len, char digest[SHA512_DIGEST_STRING_LENGTH]) {
1001 SHA512_CTX context;
1002
1003 SHA512_Init(&context);
1004 SHA512_Update(&context, data, len);
1005 return SHA512_End(&context, digest);
1006}
1007
1008/*** SHA-384: *********************************************************/
1009void SHA384_Init(SHA384_CTX* context) {
1010 if (context == (SHA384_CTX*)0) {
1011 return;
1012 }
1013 bcopy(sha384_initial_hash_value, context->state, SHA512_DIGEST_LENGTH);
1014 bzero(context->buffer, SHA384_BLOCK_LENGTH);
1015 context->bitcount[0] = context->bitcount[1] = 0;
1016}
1017
1018void SHA384_Update(SHA384_CTX* context, const sha2_byte* data, size_t len) {
1019 SHA512_Update((SHA512_CTX*)context, data, len);
1020}
1021
1022void SHA384_Final(sha2_byte digest[], SHA384_CTX* context) {
1023 sha2_word64 *d = (sha2_word64*)digest;
1024
1025 /* Sanity check: */
1026 assert(context != (SHA384_CTX*)0);
1027
1028 /* If no digest buffer is passed, we don't bother doing this: */
1029 if (digest != (sha2_byte*)0) {
1030 SHA512_Last((SHA512_CTX*)context);
1031
1032 /* Save the hash data for output: */
1033#if SHA2_BYTE_ORDER == SHA2_LITTLE_ENDIAN
1034 {
1035 /* Convert TO host byte order */
1036 int j;
1037 for (j = 0; j < 6; j++) {
1038 REVERSE64(context->state[j],context->state[j]);
1039 *d++ = context->state[j];
1040 }
1041 }
1042#else
1043 bcopy(context->state, d, SHA384_DIGEST_LENGTH);
1044#endif
1045 }
1046
1047 /* Zero out state data */
1048 bzero(context, sizeof(context));
1049}
1050
1051char *SHA384_End(SHA384_CTX* context, char buffer[]) {
1052 sha2_byte digest[SHA384_DIGEST_LENGTH], *d = digest;
1053 int i;
1054
1055 /* Sanity check: */
1056 assert(context != (SHA384_CTX*)0);
1057
1058 if (buffer != (char*)0) {
1059 SHA384_Final(digest, context);
1060
1061 for (i = 0; i < SHA384_DIGEST_LENGTH; i++) {
1062 *buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
1063 *buffer++ = sha2_hex_digits[*d & 0x0f];
1064 d++;
1065 }
1066 *buffer = (char)0;
1067 } else {
1068 bzero(context, sizeof(context));
1069 }
1070 bzero(digest, SHA384_DIGEST_LENGTH);
1071 return buffer;
1072}
1073
1074char* SHA384_Data(const sha2_byte* data, size_t len, char digest[SHA384_DIGEST_STRING_LENGTH]) {
1075 SHA384_CTX context;
1076
1077 SHA384_Init(&context);
1078 SHA384_Update(&context, data, len);
1079 return SHA384_End(&context, digest);
1080}
1081
1082#endif /* !NO_64BIT */
1083
1084/*
1085 * $PchId: sha2.c,v 1.1 2005/06/28 14:29:23 philip Exp $
1086 */
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