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8d138742 CE |
1 | /* |
2 | ** Copyright 2008 Double Precision, Inc. | |
3 | ** See COPYING for distribution information. | |
4 | */ | |
5 | ||
6 | #define SHA1_INTERNAL | |
7 | #include "sha1.h" | |
8 | ||
9 | #include <string.h> | |
10 | #include <stdlib.h> | |
11 | ||
8d138742 CE |
12 | |
13 | #define ROTR(x,n) ((SHA512_WORD)(((SHA512_WORD)(x) >> (n))|((x) << (64-(n))))) | |
14 | ||
15 | #define ROTL(x,n) ((SHA512_WORD)(((SHA512_WORD)(x) << (n))|((x) >> (64-(n))))) | |
16 | ||
17 | ||
18 | #define CH(x,y,z) ((SHA512_WORD)(((x) & (y)) ^ ((~(x))&(z)))) | |
19 | #define MAJ(x,y,z) ((SHA512_WORD)(((x)&(y))^((x)&(z))^((y)&(z)))) | |
20 | ||
21 | #define SUM0(x) ((SHA512_WORD)(ROTR((x),28)^ROTR((x),34)^ROTR((x),39))) | |
22 | #define SUM1(x) ((SHA512_WORD)(ROTR((x),14)^ROTR((x),18)^ROTR((x),41))) | |
23 | ||
24 | #define TH0(x) ((SHA512_WORD)(ROTR((x),1)^ROTR((x),8)^((SHA512_WORD)(x)>>7))) | |
25 | #define TH1(x) ((SHA512_WORD)(ROTR((x),19)^ROTR((x),61)^((SHA512_WORD)(x)>>6))) | |
26 | ||
27 | static const SHA512_WORD K[80]={ | |
28 | 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL, | |
29 | 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, | |
30 | 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, | |
31 | 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL, | |
32 | 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, | |
33 | 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, | |
34 | 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL, | |
35 | 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, | |
36 | 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, | |
37 | 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL, | |
38 | 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, | |
39 | 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, | |
40 | 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL, | |
41 | 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, | |
42 | 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, | |
43 | 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL, | |
44 | 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, | |
45 | 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, | |
46 | 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL, | |
47 | 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL}; | |
48 | ||
49 | void sha512_context_init(struct SHA512_CONTEXT *c) | |
50 | { | |
51 | if (sizeof(SHA512_WORD) != 8) | |
52 | abort(); | |
53 | ||
54 | c->H[0] = 0x6a09e667f3bcc908ULL; | |
55 | c->H[1] = 0xbb67ae8584caa73bULL; | |
56 | c->H[2] = 0x3c6ef372fe94f82bULL; | |
57 | c->H[3] = 0xa54ff53a5f1d36f1ULL; | |
58 | c->H[4] = 0x510e527fade682d1ULL; | |
59 | c->H[5] = 0x9b05688c2b3e6c1fULL; | |
60 | c->H[6] = 0x1f83d9abfb41bd6bULL; | |
61 | c->H[7] = 0x5be0cd19137e2179ULL; | |
62 | ||
63 | c->blk_ptr=0; | |
64 | } | |
65 | ||
66 | void sha512_context_hash(struct SHA512_CONTEXT *cc, | |
67 | const unsigned char blk[SHA512_BLOCK_SIZE]) | |
68 | { | |
69 | SHA512_WORD W[80]; | |
70 | unsigned i, t; | |
71 | SHA512_WORD a,b,c,d,e,f,g,h; | |
72 | ||
73 | for (i=t=0; t<16; t++) | |
74 | { | |
75 | SHA512_WORD x=blk[i]; i++; | |
76 | ||
77 | x=(x << 8) | blk[i]; i++; | |
78 | x=(x << 8) | blk[i]; i++; | |
79 | x=(x << 8) | blk[i]; i++; | |
80 | x=(x << 8) | blk[i]; i++; | |
81 | x=(x << 8) | blk[i]; i++; | |
82 | x=(x << 8) | blk[i]; i++; | |
83 | W[t]=(x << 8) | blk[i]; i++; | |
84 | } | |
85 | ||
86 | for (t=16; t<80; t++) | |
87 | W[t]= TH1(W[t-2]) + W[t-7] + TH0(W[t-15]) + W[t-16]; | |
88 | ||
89 | a=cc->H[0]; | |
90 | b=cc->H[1]; | |
91 | c=cc->H[2]; | |
92 | d=cc->H[3]; | |
93 | e=cc->H[4]; | |
94 | f=cc->H[5]; | |
95 | g=cc->H[6]; | |
96 | h=cc->H[7]; | |
97 | ||
98 | for (t=0; t<80; t++) | |
99 | { | |
100 | SHA512_WORD T1=h + SUM1(e) + CH(e,f,g) + K[t] + W[t]; | |
101 | SHA512_WORD T2=SUM0(a)+MAJ(a,b,c); | |
102 | h=g; | |
103 | g=f; | |
104 | f=e; | |
105 | e=d+T1; | |
106 | d=c; | |
107 | c=b; | |
108 | b=a; | |
109 | a=T1+T2; | |
110 | } | |
111 | ||
112 | cc->H[0] += a; | |
113 | cc->H[1] += b; | |
114 | cc->H[2] += c; | |
115 | cc->H[3] += d; | |
116 | cc->H[4] += e; | |
117 | cc->H[5] += f; | |
118 | cc->H[6] += g; | |
119 | cc->H[7] += h; | |
120 | } | |
121 | ||
122 | void sha512_context_hashstream(struct SHA512_CONTEXT *c, const void *p, unsigned l) | |
123 | { | |
124 | const unsigned char *cp=(const unsigned char *)p; | |
125 | unsigned ll; | |
126 | ||
127 | while (l) | |
128 | { | |
129 | if (c->blk_ptr == 0 && l >= SHA512_BLOCK_SIZE) | |
130 | { | |
131 | sha512_context_hash(c, cp); | |
132 | cp += SHA512_BLOCK_SIZE; | |
133 | l -= SHA512_BLOCK_SIZE; | |
134 | continue; | |
135 | } | |
136 | ||
137 | ll=l; | |
138 | if (ll > SHA512_BLOCK_SIZE - c->blk_ptr) | |
139 | ll=SHA512_BLOCK_SIZE - c->blk_ptr; | |
140 | memcpy(c->blk + c->blk_ptr, cp, ll); | |
141 | c->blk_ptr += ll; | |
142 | cp += ll; | |
143 | l -= ll; | |
144 | if (c->blk_ptr >= SHA512_BLOCK_SIZE) | |
145 | { | |
146 | sha512_context_hash(c, c->blk); | |
147 | c->blk_ptr=0; | |
148 | } | |
149 | } | |
150 | } | |
151 | ||
152 | void sha512_context_endstream(struct SHA512_CONTEXT *c, SHA512_WORD l) | |
153 | { | |
154 | unsigned char buf[16]; | |
155 | size_t i; | |
156 | static const unsigned char zero[SHA512_BLOCK_SIZE-8]; | |
157 | ||
158 | buf[0]=0x80; | |
159 | sha512_context_hashstream(c, &buf, 1); | |
160 | while (c->blk_ptr != SHA512_BLOCK_SIZE-16) | |
161 | { | |
162 | if (c->blk_ptr > SHA512_BLOCK_SIZE-16) | |
163 | { | |
164 | sha512_context_hashstream(c, zero, | |
165 | SHA512_BLOCK_SIZE - c->blk_ptr); | |
166 | continue; | |
167 | } | |
168 | sha512_context_hashstream(c, zero, | |
169 | SHA512_BLOCK_SIZE-16-c->blk_ptr); | |
170 | } | |
171 | ||
172 | l *= 8; | |
173 | ||
174 | for (i=0; i<16; i++) | |
175 | { | |
176 | buf[15-i]=l; | |
177 | l >>= 8; | |
178 | } | |
179 | ||
180 | sha512_context_hashstream(c, buf, sizeof(buf)); | |
181 | } | |
182 | ||
183 | void sha512_context_digest(struct SHA512_CONTEXT *c, SHA512_DIGEST d) | |
184 | { | |
185 | unsigned char *dp=d + SHA512_DIGEST_SIZE; | |
186 | unsigned i; | |
187 | ||
188 | for ( i=8; i; ) | |
189 | { | |
190 | SHA512_WORD w=c->H[--i]; | |
191 | ||
192 | *--dp=w; w >>= 8; | |
193 | *--dp=w; w >>= 8; | |
194 | *--dp=w; w >>= 8; | |
195 | *--dp=w; w >>= 8; | |
196 | *--dp=w; w >>= 8; | |
197 | *--dp=w; w >>= 8; | |
198 | *--dp=w; w >>= 8; | |
199 | *--dp=w; | |
200 | } | |
201 | } | |
202 | ||
203 | void sha512_context_restore(struct SHA512_CONTEXT *c, const SHA512_DIGEST d) | |
204 | { | |
205 | const unsigned char *dp=d; | |
206 | unsigned i; | |
207 | ||
208 | for (i=0; i<8; i++) | |
209 | { | |
210 | SHA512_WORD w= *dp++; | |
211 | ||
212 | w=(w << 8) | *dp++; | |
213 | w=(w << 8) | *dp++; | |
214 | w=(w << 8) | *dp++; | |
215 | w=(w << 8) | *dp++; | |
216 | w=(w << 8) | *dp++; | |
217 | w=(w << 8) | *dp++; | |
218 | w=(w << 8) | *dp++; | |
219 | c->H[i]=w; | |
220 | } | |
221 | c->blk_ptr=0; | |
222 | } | |
223 | ||
224 | void sha512_digest(const void *msg, unsigned len, SHA512_DIGEST d) | |
225 | { | |
226 | struct SHA512_CONTEXT c; | |
227 | ||
228 | sha512_context_init( &c ); | |
229 | sha512_context_hashstream(&c, msg, len); | |
230 | sha512_context_endstream(&c, len); | |
231 | sha512_context_digest( &c, d ); | |
232 | } |