This source file includes following definitions.
- SHA1Transform
- CHAR64LONG16
- SHA1Init
- SHA1Update
- SHA1Final
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20 #define SHA1HANDSOFF
21
22 #include <sys/param.h>
23 #include <sys/systm.h>
24
25 #include <crypto/sha1.h>
26
27 #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
28
29
30
31 #if BYTE_ORDER == LITTLE_ENDIAN
32 #define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
33 |(rol(block->l[i],8)&0x00FF00FF))
34 #else
35 #define blk0(i) block->l[i]
36 #endif
37 #define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
38 ^block->l[(i+2)&15]^block->l[i&15],1))
39
40
41 #define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
42 #define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
43 #define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
44 #define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
45 #define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
46
47
48
49 void
50 SHA1Transform(u_int32_t state[5], unsigned char buffer[SHA1_BLOCK_LENGTH])
51 {
52 u_int32_t a, b, c, d, e;
53 typedef union {
54 unsigned char c[64];
55 unsigned int l[16];
56 } CHAR64LONG16;
57 CHAR64LONG16* block;
58 #ifdef SHA1HANDSOFF
59 unsigned char workspace[SHA1_BLOCK_LENGTH];
60
61 block = (CHAR64LONG16 *)workspace;
62 bcopy(buffer, block, SHA1_BLOCK_LENGTH);
63 #else
64 block = (CHAR64LONG16 *)buffer;
65 #endif
66
67 a = state[0];
68 b = state[1];
69 c = state[2];
70 d = state[3];
71 e = state[4];
72
73
74 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);
75 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);
76 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);
77 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);
78 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);
79 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);
80 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);
81 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);
82 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);
83 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);
84 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);
85 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);
86 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);
87 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);
88 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);
89 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);
90 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);
91 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);
92 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);
93 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);
94
95
96 state[0] += a;
97 state[1] += b;
98 state[2] += c;
99 state[3] += d;
100 state[4] += e;
101
102 a = b = c = d = e = 0;
103 }
104
105
106
107
108 void
109 SHA1Init(SHA1_CTX *context)
110 {
111
112 context->count = 0;
113 context->state[0] = 0x67452301;
114 context->state[1] = 0xEFCDAB89;
115 context->state[2] = 0x98BADCFE;
116 context->state[3] = 0x10325476;
117 context->state[4] = 0xC3D2E1F0;
118 }
119
120
121
122
123 void
124 SHA1Update(SHA1_CTX *context, unsigned char *data, unsigned int len)
125 {
126 unsigned int i;
127 unsigned int j;
128
129 j = (u_int32_t)((context->count >> 3) & 63);
130 context->count += (len << 3);
131 if ((j + len) > 63) {
132 bcopy(data, &context->buffer[j], (i = 64 - j));
133 SHA1Transform(context->state, context->buffer);
134 for ( ; i + 63 < len; i += 64) {
135 SHA1Transform(context->state, &data[i]);
136 }
137 j = 0;
138 }
139 else i = 0;
140 bcopy(&data[i], &context->buffer[j], len - i);
141 }
142
143
144
145
146 void
147 SHA1Final(unsigned char digest[SHA1_DIGEST_LENGTH], SHA1_CTX *context)
148 {
149 unsigned int i;
150 unsigned char finalcount[8];
151
152 for (i = 0; i < 8; i++) {
153 finalcount[i] = (unsigned char)((context->count >>
154 ((7 - (i & 7)) * 8)) & 255);
155 }
156 SHA1Update(context, (unsigned char *)"\200", 1);
157 while ((context->count & 504) != 448) {
158 SHA1Update(context, (unsigned char *)"\0", 1);
159 }
160 SHA1Update(context, finalcount, 8);
161
162 if (digest)
163 for (i = 0; i < SHA1_DIGEST_LENGTH; i++) {
164 digest[i] = (unsigned char)((context->state[i >> 2] >>
165 ((3 - (i & 3)) * 8)) & 255);
166 }
167 #if 0
168
169 i = 0;
170 bzero(context->buffer, 64);
171 bzero(context->state, 20);
172 bzero(context->count, 8);
173 bzero(&finalcount, 8);
174 #ifdef SHA1HANDSOFF
175 SHA1Transform(context->state, context->buffer);
176 #endif
177 #endif
178 }