Annotation of embedaddon/ntp/lib/isc/sha1.c, revision 1.1.1.1
1.1 misho 1: /*
2: * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
3: * Copyright (C) 2000, 2001, 2003 Internet Software Consortium.
4: *
5: * Permission to use, copy, modify, and/or distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
10: * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
11: * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
12: * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
13: * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
14: * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
15: * PERFORMANCE OF THIS SOFTWARE.
16: */
17:
18: /* $Id: sha1.c,v 1.18 2007/06/19 23:47:17 tbox Exp $ */
19:
20: /* $NetBSD: sha1.c,v 1.5 2000/01/22 22:19:14 mycroft Exp $ */
21: /* $OpenBSD: sha1.c,v 1.9 1997/07/23 21:12:32 kstailey Exp $ */
22:
23: /*! \file
24: * SHA-1 in C
25: * \author By Steve Reid <steve@edmweb.com>
26: * 100% Public Domain
27: * \verbatim
28: * Test Vectors (from FIPS PUB 180-1)
29: * "abc"
30: * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
31: * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
32: * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
33: * A million repetitions of "a"
34: * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
35: * \endverbatim
36: */
37:
38: #include "config.h"
39:
40: #include <isc/assertions.h>
41: #include <isc/sha1.h>
42: #include <isc/string.h>
43: #include <isc/types.h>
44: #include <isc/util.h>
45:
46: #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
47:
48: /*@{*/
49: /*!
50: * blk0() and blk() perform the initial expand.
51: * I got the idea of expanding during the round function from SSLeay
52: */
53: #if !defined(WORDS_BIGENDIAN)
54: # define blk0(i) \
55: (block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) \
56: | (rol(block->l[i], 8) & 0x00FF00FF))
57: #else
58: # define blk0(i) block->l[i]
59: #endif
60: #define blk(i) \
61: (block->l[i & 15] = rol(block->l[(i + 13) & 15] \
62: ^ block->l[(i + 8) & 15] \
63: ^ block->l[(i + 2) & 15] \
64: ^ block->l[i & 15], 1))
65:
66: /*@}*/
67: /*@{*/
68: /*!
69: * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1
70: */
71: #define R0(v,w,x,y,z,i) \
72: z += ((w & (x ^ y)) ^ y) + blk0(i) + 0x5A827999 + rol(v, 5); \
73: w = rol(w, 30);
74: #define R1(v,w,x,y,z,i) \
75: z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \
76: w = rol(w, 30);
77: #define R2(v,w,x,y,z,i) \
78: z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \
79: w = rol(w, 30);
80: #define R3(v,w,x,y,z,i) \
81: z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \
82: w = rol(w, 30);
83: #define R4(v,w,x,y,z,i) \
84: z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \
85: w = rol(w, 30);
86:
87: /*@}*/
88:
89: typedef union {
90: unsigned char c[64];
91: unsigned int l[16];
92: } CHAR64LONG16;
93:
94: #ifdef __sparc_v9__
95: static void do_R01(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
96: isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
97: static void do_R2(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
98: isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
99: static void do_R3(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
100: isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
101: static void do_R4(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c,
102: isc_uint32_t *d, isc_uint32_t *e, CHAR64LONG16 *);
103:
104: #define nR0(v,w,x,y,z,i) R0(*v,*w,*x,*y,*z,i)
105: #define nR1(v,w,x,y,z,i) R1(*v,*w,*x,*y,*z,i)
106: #define nR2(v,w,x,y,z,i) R2(*v,*w,*x,*y,*z,i)
107: #define nR3(v,w,x,y,z,i) R3(*v,*w,*x,*y,*z,i)
108: #define nR4(v,w,x,y,z,i) R4(*v,*w,*x,*y,*z,i)
109:
110: static void
111: do_R01(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
112: isc_uint32_t *e, CHAR64LONG16 *block)
113: {
114: nR0(a,b,c,d,e, 0); nR0(e,a,b,c,d, 1); nR0(d,e,a,b,c, 2);
115: nR0(c,d,e,a,b, 3); nR0(b,c,d,e,a, 4); nR0(a,b,c,d,e, 5);
116: nR0(e,a,b,c,d, 6); nR0(d,e,a,b,c, 7); nR0(c,d,e,a,b, 8);
117: nR0(b,c,d,e,a, 9); nR0(a,b,c,d,e,10); nR0(e,a,b,c,d,11);
118: nR0(d,e,a,b,c,12); nR0(c,d,e,a,b,13); nR0(b,c,d,e,a,14);
119: nR0(a,b,c,d,e,15); nR1(e,a,b,c,d,16); nR1(d,e,a,b,c,17);
120: nR1(c,d,e,a,b,18); nR1(b,c,d,e,a,19);
121: }
122:
123: static void
124: do_R2(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
125: isc_uint32_t *e, CHAR64LONG16 *block)
126: {
127: nR2(a,b,c,d,e,20); nR2(e,a,b,c,d,21); nR2(d,e,a,b,c,22);
128: nR2(c,d,e,a,b,23); nR2(b,c,d,e,a,24); nR2(a,b,c,d,e,25);
129: nR2(e,a,b,c,d,26); nR2(d,e,a,b,c,27); nR2(c,d,e,a,b,28);
130: nR2(b,c,d,e,a,29); nR2(a,b,c,d,e,30); nR2(e,a,b,c,d,31);
131: nR2(d,e,a,b,c,32); nR2(c,d,e,a,b,33); nR2(b,c,d,e,a,34);
132: nR2(a,b,c,d,e,35); nR2(e,a,b,c,d,36); nR2(d,e,a,b,c,37);
133: nR2(c,d,e,a,b,38); nR2(b,c,d,e,a,39);
134: }
135:
136: static void
137: do_R3(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
138: isc_uint32_t *e, CHAR64LONG16 *block)
139: {
140: nR3(a,b,c,d,e,40); nR3(e,a,b,c,d,41); nR3(d,e,a,b,c,42);
141: nR3(c,d,e,a,b,43); nR3(b,c,d,e,a,44); nR3(a,b,c,d,e,45);
142: nR3(e,a,b,c,d,46); nR3(d,e,a,b,c,47); nR3(c,d,e,a,b,48);
143: nR3(b,c,d,e,a,49); nR3(a,b,c,d,e,50); nR3(e,a,b,c,d,51);
144: nR3(d,e,a,b,c,52); nR3(c,d,e,a,b,53); nR3(b,c,d,e,a,54);
145: nR3(a,b,c,d,e,55); nR3(e,a,b,c,d,56); nR3(d,e,a,b,c,57);
146: nR3(c,d,e,a,b,58); nR3(b,c,d,e,a,59);
147: }
148:
149: static void
150: do_R4(isc_uint32_t *a, isc_uint32_t *b, isc_uint32_t *c, isc_uint32_t *d,
151: isc_uint32_t *e, CHAR64LONG16 *block)
152: {
153: nR4(a,b,c,d,e,60); nR4(e,a,b,c,d,61); nR4(d,e,a,b,c,62);
154: nR4(c,d,e,a,b,63); nR4(b,c,d,e,a,64); nR4(a,b,c,d,e,65);
155: nR4(e,a,b,c,d,66); nR4(d,e,a,b,c,67); nR4(c,d,e,a,b,68);
156: nR4(b,c,d,e,a,69); nR4(a,b,c,d,e,70); nR4(e,a,b,c,d,71);
157: nR4(d,e,a,b,c,72); nR4(c,d,e,a,b,73); nR4(b,c,d,e,a,74);
158: nR4(a,b,c,d,e,75); nR4(e,a,b,c,d,76); nR4(d,e,a,b,c,77);
159: nR4(c,d,e,a,b,78); nR4(b,c,d,e,a,79);
160: }
161: #endif
162:
163: /*!
164: * Hash a single 512-bit block. This is the core of the algorithm.
165: */
166: static void
167: transform(isc_uint32_t state[5], const unsigned char buffer[64]) {
168: isc_uint32_t a, b, c, d, e;
169: CHAR64LONG16 *block;
170: CHAR64LONG16 workspace;
171:
172: INSIST(buffer != NULL);
173: INSIST(state != NULL);
174:
175: block = &workspace;
176: (void)memcpy(block, buffer, 64);
177:
178: /* Copy context->state[] to working vars */
179: a = state[0];
180: b = state[1];
181: c = state[2];
182: d = state[3];
183: e = state[4];
184:
185: #ifdef __sparc_v9__
186: do_R01(&a, &b, &c, &d, &e, block);
187: do_R2(&a, &b, &c, &d, &e, block);
188: do_R3(&a, &b, &c, &d, &e, block);
189: do_R4(&a, &b, &c, &d, &e, block);
190: #else
191: /* 4 rounds of 20 operations each. Loop unrolled. */
192: R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
193: R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
194: R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
195: R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
196: R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
197: R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
198: R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
199: R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
200: R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
201: R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
202: R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
203: R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
204: R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
205: R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
206: R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
207: R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
208: R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
209: R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
210: R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
211: R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
212: #endif
213:
214: /* Add the working vars back into context.state[] */
215: state[0] += a;
216: state[1] += b;
217: state[2] += c;
218: state[3] += d;
219: state[4] += e;
220:
221: /* Wipe variables */
222: a = b = c = d = e = 0;
223: }
224:
225:
226: /*!
227: * isc_sha1_init - Initialize new context
228: */
229: void
230: isc_sha1_init(isc_sha1_t *context)
231: {
232: INSIST(context != NULL);
233:
234: /* SHA1 initialization constants */
235: context->state[0] = 0x67452301;
236: context->state[1] = 0xEFCDAB89;
237: context->state[2] = 0x98BADCFE;
238: context->state[3] = 0x10325476;
239: context->state[4] = 0xC3D2E1F0;
240: context->count[0] = 0;
241: context->count[1] = 0;
242: }
243:
244: void
245: isc_sha1_invalidate(isc_sha1_t *context) {
246: memset(context, 0, sizeof(isc_sha1_t));
247: }
248:
249: /*!
250: * Run your data through this.
251: */
252: void
253: isc_sha1_update(isc_sha1_t *context, const unsigned char *data,
254: unsigned int len)
255: {
256: unsigned int i, j;
257:
258: INSIST(context != 0);
259: INSIST(data != 0);
260:
261: j = context->count[0];
262: if ((context->count[0] += len << 3) < j)
263: context->count[1] += (len >> 29) + 1;
264: j = (j >> 3) & 63;
265: if ((j + len) > 63) {
266: (void)memcpy(&context->buffer[j], data, (i = 64 - j));
267: transform(context->state, context->buffer);
268: for (; i + 63 < len; i += 64)
269: transform(context->state, &data[i]);
270: j = 0;
271: } else {
272: i = 0;
273: }
274:
275: (void)memcpy(&context->buffer[j], &data[i], len - i);
276: }
277:
278:
279: /*!
280: * Add padding and return the message digest.
281: */
282:
283: static const unsigned char final_200 = 128;
284: static const unsigned char final_0 = 0;
285:
286: void
287: isc_sha1_final(isc_sha1_t *context, unsigned char *digest) {
288: unsigned int i;
289: unsigned char finalcount[8];
290:
291: INSIST(digest != 0);
292: INSIST(context != 0);
293:
294: for (i = 0; i < 8; i++) {
295: /* Endian independent */
296: finalcount[i] = (unsigned char)
297: ((context->count[(i >= 4 ? 0 : 1)]
298: >> ((3 - (i & 3)) * 8)) & 255);
299: }
300:
301: isc_sha1_update(context, &final_200, 1);
302: while ((context->count[0] & 504) != 448)
303: isc_sha1_update(context, &final_0, 1);
304: /* The next Update should cause a transform() */
305: isc_sha1_update(context, finalcount, 8);
306:
307: if (digest) {
308: for (i = 0; i < 20; i++)
309: digest[i] = (unsigned char)
310: ((context->state[i >> 2]
311: >> ((3 - (i & 3)) * 8)) & 255);
312: }
313:
314: memset(context, 0, sizeof(isc_sha1_t));
315: }
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