1 /* @(#)sha1.c 1.3 12/12/02 2009-2012 J. Schilling */
2 #include <schily/mconfig.h>
3 #ifndef lint
4 static UConst char sccsid[] =
5 "@(#)sha1.c 1.3 12/12/02 2009-2012 J. Schilling";
6 #endif
7 /*
8 * SHA1 hash code taken from OpenBSD
9 *
10 * Portions Copyright (c) 2009-2012 J. Schilling
11 */
12
13 /* $OpenBSD: sha1.c,v 1.21 2008/07/29 19:32:50 miod Exp $ */
14
15 /*
16 * SHA-1 in C
17 * By Steve Reid <steve@edmweb.com>
18 * 100% Public Domain
19 *
20 * Test Vectors (from FIPS PUB 180-1)
21 * "abc"
22 * A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
23 * "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
24 * 84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
25 * A million repetitions of "a"
26 * 34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
27 */
28
29 #include <schily/standard.h>
30 #include <schily/string.h>
31 #include <schily/sha1.h>
32
33 #if !defined(HAVE_MEMCPY) || !defined(HAVE_MEMSET)
34 #include <schily/schily.h>
35 #endif
36 #if !defined(HAVE_MEMCPY) && !defined(memcpy)
37 #define memcpy(s1, s2, n) movebytes(s2, s1, n)
38 #endif
39 #if !defined(HAVE_MEMSET) && !defined(memset)
40 #define memset(s, c, n) fillbytes(s, n, c)
41 #endif
42
43
44 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
45
46 /*
47 * blk0() and blk() perform the initial expand.
48 * I got the idea of expanding during the round function from SSLeay
49 */
50 #ifndef WORDS_BIGENDIAN
51 #define blk0(i) (block->l[i] = (rol(block->l[i], 24)&0xFF00FF00) \
52 |(rol(block->l[i], 8)&0x00FF00FF))
53 #else
54 #define blk0(i) block->l[i]
55 #endif
56 #define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
57 ^block->l[(i+2)&15]^block->l[i&15], 1))
58
59 /*
60 * (R0+R1), R2, R3, R4 are the different operations (rounds) used in SHA1
61 */
62 #define R0(v, w, x, y, z, i) z += ((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v, 5); w = rol(w, 30);
63 #define R1(v, w, x, y, z, i) z += ((w&(x^y))^y)+blk(i)+0x5A827999+rol(v, 5); w = rol(w, 30);
64 #define R2(v, w, x, y, z, i) z += (w^x^y)+blk(i)+0x6ED9EBA1+rol(v, 5); w = rol(w, 30);
65 #define R3(v, w, x, y, z, i) z += (((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v, 5); w = rol(w, 30);
66 #define R4(v, w, x, y, z, i) z += (w^x^y)+blk(i)+0xCA62C1D6+rol(v, 5); w = rol(w, 30);
67
68 typedef union {
69 UInt8_t c[64];
70 UInt32_t l[16];
71 } CHAR64LONG16;
72
73 #ifdef __sh__
74 static void do_R01(UInt32_t *a, UInt32_t *b, UInt32_t *c, UInt32_t *d, UInt32_t *e, CHAR64LONG16 *);
75 static void do_R2(UInt32_t *a, UInt32_t *b, UInt32_t *c, UInt32_t *d, UInt32_t *e, CHAR64LONG16 *);
76 static void do_R3(UInt32_t *a, UInt32_t *b, UInt32_t *c, UInt32_t *d, UInt32_t *e, CHAR64LONG16 *);
77 static void do_R4(UInt32_t *a, UInt32_t *b, UInt32_t *c, UInt32_t *d, UInt32_t *e, CHAR64LONG16 *);
78
79 #define nR0(v, w, x, y, z, i) R0(*v, *w, *x, *y, *z, i)
80 #define nR1(v, w, x, y, z, i) R1(*v, *w, *x, *y, *z, i)
81 #define nR2(v, w, x, y, z, i) R2(*v, *w, *x, *y, *z, i)
82 #define nR3(v, w, x, y, z, i) R3(*v, *w, *x, *y, *z, i)
83 #define nR4(v, w, x, y, z, i) R4(*v, *w, *x, *y, *z, i)
84
85 /* BEGIN CSTYLED */
86 static void
do_R01(UInt32_t * a,UInt32_t * b,UInt32_t * c,UInt32_t * d,UInt32_t * e,CHAR64LONG16 * block)87 do_R01(UInt32_t *a, UInt32_t *b, UInt32_t *c, UInt32_t *d, UInt32_t *e, CHAR64LONG16 *block)
88 {
89 nR0(a,b,c,d,e, 0); nR0(e,a,b,c,d, 1); nR0(d,e,a,b,c, 2); nR0(c,d,e,a,b, 3);
90 nR0(b,c,d,e,a, 4); nR0(a,b,c,d,e, 5); nR0(e,a,b,c,d, 6); nR0(d,e,a,b,c, 7);
91 nR0(c,d,e,a,b, 8); nR0(b,c,d,e,a, 9); nR0(a,b,c,d,e,10); nR0(e,a,b,c,d,11);
92 nR0(d,e,a,b,c,12); nR0(c,d,e,a,b,13); nR0(b,c,d,e,a,14); nR0(a,b,c,d,e,15);
93 nR1(e,a,b,c,d,16); nR1(d,e,a,b,c,17); nR1(c,d,e,a,b,18); nR1(b,c,d,e,a,19);
94 }
95
96 static void
do_R2(UInt32_t * a,UInt32_t * b,UInt32_t * c,UInt32_t * d,UInt32_t * e,CHAR64LONG16 * block)97 do_R2(UInt32_t *a, UInt32_t *b, UInt32_t *c, UInt32_t *d, UInt32_t *e, CHAR64LONG16 *block)
98 {
99 nR2(a,b,c,d,e,20); nR2(e,a,b,c,d,21); nR2(d,e,a,b,c,22); nR2(c,d,e,a,b,23);
100 nR2(b,c,d,e,a,24); nR2(a,b,c,d,e,25); nR2(e,a,b,c,d,26); nR2(d,e,a,b,c,27);
101 nR2(c,d,e,a,b,28); nR2(b,c,d,e,a,29); nR2(a,b,c,d,e,30); nR2(e,a,b,c,d,31);
102 nR2(d,e,a,b,c,32); nR2(c,d,e,a,b,33); nR2(b,c,d,e,a,34); nR2(a,b,c,d,e,35);
103 nR2(e,a,b,c,d,36); nR2(d,e,a,b,c,37); nR2(c,d,e,a,b,38); nR2(b,c,d,e,a,39);
104 }
105
106 static void
do_R3(UInt32_t * a,UInt32_t * b,UInt32_t * c,UInt32_t * d,UInt32_t * e,CHAR64LONG16 * block)107 do_R3(UInt32_t *a, UInt32_t *b, UInt32_t *c, UInt32_t *d, UInt32_t *e, CHAR64LONG16 *block)
108 {
109 nR3(a,b,c,d,e,40); nR3(e,a,b,c,d,41); nR3(d,e,a,b,c,42); nR3(c,d,e,a,b,43);
110 nR3(b,c,d,e,a,44); nR3(a,b,c,d,e,45); nR3(e,a,b,c,d,46); nR3(d,e,a,b,c,47);
111 nR3(c,d,e,a,b,48); nR3(b,c,d,e,a,49); nR3(a,b,c,d,e,50); nR3(e,a,b,c,d,51);
112 nR3(d,e,a,b,c,52); nR3(c,d,e,a,b,53); nR3(b,c,d,e,a,54); nR3(a,b,c,d,e,55);
113 nR3(e,a,b,c,d,56); nR3(d,e,a,b,c,57); nR3(c,d,e,a,b,58); nR3(b,c,d,e,a,59);
114 }
115
116 static void
do_R4(UInt32_t * a,UInt32_t * b,UInt32_t * c,UInt32_t * d,UInt32_t * e,CHAR64LONG16 * block)117 do_R4(UInt32_t *a, UInt32_t *b, UInt32_t *c, UInt32_t *d, UInt32_t *e, CHAR64LONG16 *block)
118 {
119 nR4(a,b,c,d,e,60); nR4(e,a,b,c,d,61); nR4(d,e,a,b,c,62); nR4(c,d,e,a,b,63);
120 nR4(b,c,d,e,a,64); nR4(a,b,c,d,e,65); nR4(e,a,b,c,d,66); nR4(d,e,a,b,c,67);
121 nR4(c,d,e,a,b,68); nR4(b,c,d,e,a,69); nR4(a,b,c,d,e,70); nR4(e,a,b,c,d,71);
122 nR4(d,e,a,b,c,72); nR4(c,d,e,a,b,73); nR4(b,c,d,e,a,74); nR4(a,b,c,d,e,75);
123 nR4(e,a,b,c,d,76); nR4(d,e,a,b,c,77); nR4(c,d,e,a,b,78); nR4(b,c,d,e,a,79);
124 }
125 /* END CSTYLED */
126 #endif
127
128 /*
129 * Hash a single 512-bit block. This is the core of the algorithm.
130 */
131 EXPORT void
SHA1Transform(state,buffer)132 SHA1Transform(state, buffer)
133 UInt32_t state[5];
134 const UInt8_t buffer[SHA1_BLOCK_LENGTH];
135 {
136 UInt32_t a, b, c, d, e;
137 UInt8_t workspace[SHA1_BLOCK_LENGTH];
138 CHAR64LONG16 *block = (CHAR64LONG16 *)workspace;
139
140 (void) memcpy(block, buffer, SHA1_BLOCK_LENGTH);
141
142 /* Copy context->state[] to working vars */
143 a = state[0];
144 b = state[1];
145 c = state[2];
146 d = state[3];
147 e = state[4];
148
149 #ifdef __sh__
150 do_R01(&a, &b, &c, &d, &e, block);
151 do_R2(&a, &b, &c, &d, &e, block);
152 do_R3(&a, &b, &c, &d, &e, block);
153 do_R4(&a, &b, &c, &d, &e, block);
154 #else
155 /* BEGIN CSTYLED */
156 /* 4 rounds of 20 operations each. Loop unrolled. */
157 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);
158 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);
159 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);
160 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);
161 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);
162 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);
163 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);
164 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);
165 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);
166 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);
167 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);
168 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);
169 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);
170 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);
171 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);
172 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);
173 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);
174 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);
175 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);
176 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);
177 /* END CSTYLED */
178 #endif
179
180 /* Add the working vars back into context.state[] */
181 state[0] += a;
182 state[1] += b;
183 state[2] += c;
184 state[3] += d;
185 state[4] += e;
186
187 /* Wipe variables */
188 a = b = c = d = e = 0;
189 }
190
191
192 /*
193 * SHA1Init - Initialize new context
194 */
195 EXPORT void
SHA1Init(context)196 SHA1Init(context)
197 SHA1_CTX *context;
198 {
199
200 /* SHA1 initialization constants */
201 context->count[0] = context->count[1] = 0;
202 context->state[0] = 0x67452301;
203 context->state[1] = 0xEFCDAB89;
204 context->state[2] = 0x98BADCFE;
205 context->state[3] = 0x10325476;
206 context->state[4] = 0xC3D2E1F0;
207 }
208
209
210 /*
211 * Run your data through this.
212 */
213 EXPORT void
SHA1Update(context,data,len)214 SHA1Update(context, data, len)
215 SHA1_CTX *context;
216 const UInt8_t *data;
217 size_t len;
218 {
219 size_t i, j;
220
221 j = (size_t)((context->count[0] >> 3) & 63);
222 if ((context->count[0] += (UInt32_t)len << 3) < ((UInt32_t)len << 3))
223 context->count[1] += 1;
224 if ((j + len) > 63) {
225 (void) memcpy(&context->buffer[j], data, (i = 64-j));
226 SHA1Transform(context->state, context->buffer);
227 for (; i + 63 < len; i += 64)
228 SHA1Transform(context->state, (UInt8_t *)&data[i]);
229 j = 0;
230 } else {
231 i = 0;
232 }
233 (void) memcpy(&context->buffer[j], &data[i], len - i);
234 }
235
236
237 /*
238 * Add padding and return the message digest.
239 */
240 EXPORT void
SHA1Pad(context)241 SHA1Pad(context)
242 SHA1_CTX *context;
243 {
244 UInt8_t finalcount[8];
245 u_int i;
246
247 for (i = 0; i < 8; i++) {
248 finalcount[i] = (UInt8_t)((context->count[1- (i / 4)] >>
249 (((7 - (i & 7)) * 8)%32)) & 255); /* Endian independent */
250 }
251 SHA1Update(context, (UInt8_t *)"\200", 1);
252 while ((context->count[0] & 504) != 448)
253 SHA1Update(context, (UInt8_t *)"\0", 1);
254 SHA1Update(context, finalcount, 8); /* Should cause a SHA1Transform() */
255 }
256
257 EXPORT void
SHA1Final(digest,context)258 SHA1Final(digest, context)
259 UInt8_t digest[SHA1_DIGEST_LENGTH];
260 SHA1_CTX *context;
261 {
262 u_int i;
263
264 SHA1Pad(context);
265 if (digest) {
266 for (i = 0; i < SHA1_DIGEST_LENGTH; i++) {
267 digest[i] = (UInt8_t)
268 ((context->state[i>>2] >> ((3-(i & 3)) * 8)) & 255);
269 }
270 memset(context, 0, sizeof (*context));
271 }
272 }
273