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29
30 #include "mh_sha256_internal.h"
31 #include <string.h>
32
33 ////////////////////////////////////////////////////////////////////////
34 ////////////////////////////////////////////////////////////////////////
35 // Reference SHA256 Functions for mh_sha256
36 ////////////////////////////////////////////////////////////////////////
37 ////////////////////////////////////////////////////////////////////////
38
39 #define W(x) w[(x) & 15]
40
41 #define step(i, a, b, c, d, e, f, g, h, k) \
42 if (i < 16) \
43 W(i) = to_be32(ww[i]); \
44 else \
45 W(i) = W(i - 16) + S0(W(i - 15)) + W(i - 7) + S1(W(i - 2)); \
46 t2 = s0(a) + maj(a, b, c); \
47 t1 = h + s1(e) + ch(e, f, g) + k + W(i); \
48 d += t1; \
49 h = t1 + t2;
50
51 void
sha256_single_for_mh_sha256(const uint8_t * data,uint32_t digest[])52 sha256_single_for_mh_sha256(const uint8_t *data, uint32_t digest[])
53 {
54 uint32_t a, b, c, d, e, f, g, h, t1, t2;
55 uint32_t w[16];
56 uint32_t *ww = (uint32_t *) data;
57
58 a = digest[0];
59 b = digest[1];
60 c = digest[2];
61 d = digest[3];
62 e = digest[4];
63 f = digest[5];
64 g = digest[6];
65 h = digest[7];
66
67 step(0, a, b, c, d, e, f, g, h, 0x428a2f98);
68 step(1, h, a, b, c, d, e, f, g, 0x71374491);
69 step(2, g, h, a, b, c, d, e, f, 0xb5c0fbcf);
70 step(3, f, g, h, a, b, c, d, e, 0xe9b5dba5);
71 step(4, e, f, g, h, a, b, c, d, 0x3956c25b);
72 step(5, d, e, f, g, h, a, b, c, 0x59f111f1);
73 step(6, c, d, e, f, g, h, a, b, 0x923f82a4);
74 step(7, b, c, d, e, f, g, h, a, 0xab1c5ed5);
75 step(8, a, b, c, d, e, f, g, h, 0xd807aa98);
76 step(9, h, a, b, c, d, e, f, g, 0x12835b01);
77 step(10, g, h, a, b, c, d, e, f, 0x243185be);
78 step(11, f, g, h, a, b, c, d, e, 0x550c7dc3);
79 step(12, e, f, g, h, a, b, c, d, 0x72be5d74);
80 step(13, d, e, f, g, h, a, b, c, 0x80deb1fe);
81 step(14, c, d, e, f, g, h, a, b, 0x9bdc06a7);
82 step(15, b, c, d, e, f, g, h, a, 0xc19bf174);
83 step(16, a, b, c, d, e, f, g, h, 0xe49b69c1);
84 step(17, h, a, b, c, d, e, f, g, 0xefbe4786);
85 step(18, g, h, a, b, c, d, e, f, 0x0fc19dc6);
86 step(19, f, g, h, a, b, c, d, e, 0x240ca1cc);
87 step(20, e, f, g, h, a, b, c, d, 0x2de92c6f);
88 step(21, d, e, f, g, h, a, b, c, 0x4a7484aa);
89 step(22, c, d, e, f, g, h, a, b, 0x5cb0a9dc);
90 step(23, b, c, d, e, f, g, h, a, 0x76f988da);
91 step(24, a, b, c, d, e, f, g, h, 0x983e5152);
92 step(25, h, a, b, c, d, e, f, g, 0xa831c66d);
93 step(26, g, h, a, b, c, d, e, f, 0xb00327c8);
94 step(27, f, g, h, a, b, c, d, e, 0xbf597fc7);
95 step(28, e, f, g, h, a, b, c, d, 0xc6e00bf3);
96 step(29, d, e, f, g, h, a, b, c, 0xd5a79147);
97 step(30, c, d, e, f, g, h, a, b, 0x06ca6351);
98 step(31, b, c, d, e, f, g, h, a, 0x14292967);
99 step(32, a, b, c, d, e, f, g, h, 0x27b70a85);
100 step(33, h, a, b, c, d, e, f, g, 0x2e1b2138);
101 step(34, g, h, a, b, c, d, e, f, 0x4d2c6dfc);
102 step(35, f, g, h, a, b, c, d, e, 0x53380d13);
103 step(36, e, f, g, h, a, b, c, d, 0x650a7354);
104 step(37, d, e, f, g, h, a, b, c, 0x766a0abb);
105 step(38, c, d, e, f, g, h, a, b, 0x81c2c92e);
106 step(39, b, c, d, e, f, g, h, a, 0x92722c85);
107 step(40, a, b, c, d, e, f, g, h, 0xa2bfe8a1);
108 step(41, h, a, b, c, d, e, f, g, 0xa81a664b);
109 step(42, g, h, a, b, c, d, e, f, 0xc24b8b70);
110 step(43, f, g, h, a, b, c, d, e, 0xc76c51a3);
111 step(44, e, f, g, h, a, b, c, d, 0xd192e819);
112 step(45, d, e, f, g, h, a, b, c, 0xd6990624);
113 step(46, c, d, e, f, g, h, a, b, 0xf40e3585);
114 step(47, b, c, d, e, f, g, h, a, 0x106aa070);
115 step(48, a, b, c, d, e, f, g, h, 0x19a4c116);
116 step(49, h, a, b, c, d, e, f, g, 0x1e376c08);
117 step(50, g, h, a, b, c, d, e, f, 0x2748774c);
118 step(51, f, g, h, a, b, c, d, e, 0x34b0bcb5);
119 step(52, e, f, g, h, a, b, c, d, 0x391c0cb3);
120 step(53, d, e, f, g, h, a, b, c, 0x4ed8aa4a);
121 step(54, c, d, e, f, g, h, a, b, 0x5b9cca4f);
122 step(55, b, c, d, e, f, g, h, a, 0x682e6ff3);
123 step(56, a, b, c, d, e, f, g, h, 0x748f82ee);
124 step(57, h, a, b, c, d, e, f, g, 0x78a5636f);
125 step(58, g, h, a, b, c, d, e, f, 0x84c87814);
126 step(59, f, g, h, a, b, c, d, e, 0x8cc70208);
127 step(60, e, f, g, h, a, b, c, d, 0x90befffa);
128 step(61, d, e, f, g, h, a, b, c, 0xa4506ceb);
129 step(62, c, d, e, f, g, h, a, b, 0xbef9a3f7);
130 step(63, b, c, d, e, f, g, h, a, 0xc67178f2);
131
132 digest[0] += a;
133 digest[1] += b;
134 digest[2] += c;
135 digest[3] += d;
136 digest[4] += e;
137 digest[5] += f;
138 digest[6] += g;
139 digest[7] += h;
140 }
141
142 void
sha256_for_mh_sha256(const uint8_t * input_data,uint32_t * digest,const uint32_t len)143 sha256_for_mh_sha256(const uint8_t *input_data, uint32_t *digest, const uint32_t len)
144 {
145 uint32_t i, j;
146 uint8_t buf[2 * ISAL_SHA256_BLOCK_SIZE];
147
148 digest[0] = MH_SHA256_H0;
149 digest[1] = MH_SHA256_H1;
150 digest[2] = MH_SHA256_H2;
151 digest[3] = MH_SHA256_H3;
152 digest[4] = MH_SHA256_H4;
153 digest[5] = MH_SHA256_H5;
154 digest[6] = MH_SHA256_H6;
155 digest[7] = MH_SHA256_H7;
156
157 i = len;
158 while (i >= ISAL_SHA256_BLOCK_SIZE) {
159 sha256_single_for_mh_sha256(input_data, digest);
160 input_data += ISAL_SHA256_BLOCK_SIZE;
161 i -= ISAL_SHA256_BLOCK_SIZE;
162 }
163
164 memcpy(buf, input_data, i);
165 buf[i++] = 0x80;
166 for (j = i; j < ((2 * ISAL_SHA256_BLOCK_SIZE) - 8); j++)
167 buf[j] = 0;
168
169 if (i > ISAL_SHA256_BLOCK_SIZE - 8)
170 i = 2 * ISAL_SHA256_BLOCK_SIZE;
171 else
172 i = ISAL_SHA256_BLOCK_SIZE;
173
174 *(uint64_t *) (buf + i - 8) = to_be64((uint64_t) len * 8);
175
176 sha256_single_for_mh_sha256(buf, digest);
177 if (i == (2 * ISAL_SHA256_BLOCK_SIZE))
178 sha256_single_for_mh_sha256(buf + ISAL_SHA256_BLOCK_SIZE, digest);
179 }
180