1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/*
* SHA-{224,256}
* (C) 1999-2010 Jack Lloyd
* 2007 FlexSecure GmbH
*
* Distributed under the terms of the Botan license
*/
#include <botan/sha2_32.h>
#include <botan/loadstor.h>
#include <botan/rotate.h>
namespace Botan {
namespace {
/*
* SHA-256 Rho Function
*/
inline u32bit rho(u32bit X, u32bit rot1, u32bit rot2, u32bit rot3)
{
return (rotate_right(X, rot1) ^ rotate_right(X, rot2) ^
rotate_right(X, rot3));
}
/*
* SHA-256 Sigma Function
*/
inline u32bit sigma(u32bit X, u32bit rot1, u32bit rot2, u32bit shift)
{
return (rotate_right(X, rot1) ^ rotate_right(X, rot2) ^ (X >> shift));
}
/*
* SHA-256 F1 Function
*/
inline void F1(u32bit A, u32bit B, u32bit C, u32bit& D,
u32bit E, u32bit F, u32bit G, u32bit& H,
u32bit msg, u32bit magic)
{
H += magic + rho(E, 6, 11, 25) + ((E & F) ^ (~E & G)) + msg;
D += H;
H += rho(A, 2, 13, 22) + ((A & B) | ((A | B) & C));
}
/*
* SHA-224 / SHA-256 compression function
*/
void sha2_32_compress(MemoryRegion<u32bit>& W,
MemoryRegion<u32bit>& digest,
const byte input[], u32bit blocks)
{
u32bit A = digest[0], B = digest[1], C = digest[2],
D = digest[3], E = digest[4], F = digest[5],
G = digest[6], H = digest[7];
for(u32bit i = 0; i != blocks; ++i)
{
load_be(W.begin(), input, 16);
for(u32bit j = 16; j != 64; j += 8)
{
W[j ] = sigma(W[j- 2], 17, 19, 10) + W[j-7] +
sigma(W[j-15], 7, 18, 3) + W[j-16];
W[j+1] = sigma(W[j- 1], 17, 19, 10) + W[j-6] +
sigma(W[j-14], 7, 18, 3) + W[j-15];
W[j+2] = sigma(W[j ], 17, 19, 10) + W[j-5] +
sigma(W[j-13], 7, 18, 3) + W[j-14];
W[j+3] = sigma(W[j+ 1], 17, 19, 10) + W[j-4] +
sigma(W[j-12], 7, 18, 3) + W[j-13];
W[j+4] = sigma(W[j+ 2], 17, 19, 10) + W[j-3] +
sigma(W[j-11], 7, 18, 3) + W[j-12];
W[j+5] = sigma(W[j+ 3], 17, 19, 10) + W[j-2] +
sigma(W[j-10], 7, 18, 3) + W[j-11];
W[j+6] = sigma(W[j+ 4], 17, 19, 10) + W[j-1] +
sigma(W[j- 9], 7, 18, 3) + W[j-10];
W[j+7] = sigma(W[j+ 5], 17, 19, 10) + W[j ] +
sigma(W[j- 8], 7, 18, 3) + W[j- 9];
}
F1(A, B, C, D, E, F, G, H, W[ 0], 0x428A2F98);
F1(H, A, B, C, D, E, F, G, W[ 1], 0x71374491);
F1(G, H, A, B, C, D, E, F, W[ 2], 0xB5C0FBCF);
F1(F, G, H, A, B, C, D, E, W[ 3], 0xE9B5DBA5);
F1(E, F, G, H, A, B, C, D, W[ 4], 0x3956C25B);
F1(D, E, F, G, H, A, B, C, W[ 5], 0x59F111F1);
F1(C, D, E, F, G, H, A, B, W[ 6], 0x923F82A4);
F1(B, C, D, E, F, G, H, A, W[ 7], 0xAB1C5ED5);
F1(A, B, C, D, E, F, G, H, W[ 8], 0xD807AA98);
F1(H, A, B, C, D, E, F, G, W[ 9], 0x12835B01);
F1(G, H, A, B, C, D, E, F, W[10], 0x243185BE);
F1(F, G, H, A, B, C, D, E, W[11], 0x550C7DC3);
F1(E, F, G, H, A, B, C, D, W[12], 0x72BE5D74);
F1(D, E, F, G, H, A, B, C, W[13], 0x80DEB1FE);
F1(C, D, E, F, G, H, A, B, W[14], 0x9BDC06A7);
F1(B, C, D, E, F, G, H, A, W[15], 0xC19BF174);
F1(A, B, C, D, E, F, G, H, W[16], 0xE49B69C1);
F1(H, A, B, C, D, E, F, G, W[17], 0xEFBE4786);
F1(G, H, A, B, C, D, E, F, W[18], 0x0FC19DC6);
F1(F, G, H, A, B, C, D, E, W[19], 0x240CA1CC);
F1(E, F, G, H, A, B, C, D, W[20], 0x2DE92C6F);
F1(D, E, F, G, H, A, B, C, W[21], 0x4A7484AA);
F1(C, D, E, F, G, H, A, B, W[22], 0x5CB0A9DC);
F1(B, C, D, E, F, G, H, A, W[23], 0x76F988DA);
F1(A, B, C, D, E, F, G, H, W[24], 0x983E5152);
F1(H, A, B, C, D, E, F, G, W[25], 0xA831C66D);
F1(G, H, A, B, C, D, E, F, W[26], 0xB00327C8);
F1(F, G, H, A, B, C, D, E, W[27], 0xBF597FC7);
F1(E, F, G, H, A, B, C, D, W[28], 0xC6E00BF3);
F1(D, E, F, G, H, A, B, C, W[29], 0xD5A79147);
F1(C, D, E, F, G, H, A, B, W[30], 0x06CA6351);
F1(B, C, D, E, F, G, H, A, W[31], 0x14292967);
F1(A, B, C, D, E, F, G, H, W[32], 0x27B70A85);
F1(H, A, B, C, D, E, F, G, W[33], 0x2E1B2138);
F1(G, H, A, B, C, D, E, F, W[34], 0x4D2C6DFC);
F1(F, G, H, A, B, C, D, E, W[35], 0x53380D13);
F1(E, F, G, H, A, B, C, D, W[36], 0x650A7354);
F1(D, E, F, G, H, A, B, C, W[37], 0x766A0ABB);
F1(C, D, E, F, G, H, A, B, W[38], 0x81C2C92E);
F1(B, C, D, E, F, G, H, A, W[39], 0x92722C85);
F1(A, B, C, D, E, F, G, H, W[40], 0xA2BFE8A1);
F1(H, A, B, C, D, E, F, G, W[41], 0xA81A664B);
F1(G, H, A, B, C, D, E, F, W[42], 0xC24B8B70);
F1(F, G, H, A, B, C, D, E, W[43], 0xC76C51A3);
F1(E, F, G, H, A, B, C, D, W[44], 0xD192E819);
F1(D, E, F, G, H, A, B, C, W[45], 0xD6990624);
F1(C, D, E, F, G, H, A, B, W[46], 0xF40E3585);
F1(B, C, D, E, F, G, H, A, W[47], 0x106AA070);
F1(A, B, C, D, E, F, G, H, W[48], 0x19A4C116);
F1(H, A, B, C, D, E, F, G, W[49], 0x1E376C08);
F1(G, H, A, B, C, D, E, F, W[50], 0x2748774C);
F1(F, G, H, A, B, C, D, E, W[51], 0x34B0BCB5);
F1(E, F, G, H, A, B, C, D, W[52], 0x391C0CB3);
F1(D, E, F, G, H, A, B, C, W[53], 0x4ED8AA4A);
F1(C, D, E, F, G, H, A, B, W[54], 0x5B9CCA4F);
F1(B, C, D, E, F, G, H, A, W[55], 0x682E6FF3);
F1(A, B, C, D, E, F, G, H, W[56], 0x748F82EE);
F1(H, A, B, C, D, E, F, G, W[57], 0x78A5636F);
F1(G, H, A, B, C, D, E, F, W[58], 0x84C87814);
F1(F, G, H, A, B, C, D, E, W[59], 0x8CC70208);
F1(E, F, G, H, A, B, C, D, W[60], 0x90BEFFFA);
F1(D, E, F, G, H, A, B, C, W[61], 0xA4506CEB);
F1(C, D, E, F, G, H, A, B, W[62], 0xBEF9A3F7);
F1(B, C, D, E, F, G, H, A, W[63], 0xC67178F2);
A = (digest[0] += A);
B = (digest[1] += B);
C = (digest[2] += C);
D = (digest[3] += D);
E = (digest[4] += E);
F = (digest[5] += F);
G = (digest[6] += G);
H = (digest[7] += H);
input += 64;
}
}
}
/*
* SHA-224 compression function
*/
void SHA_224::compress_n(const byte input[], u32bit blocks)
{
sha2_32_compress(W, digest, input, blocks);
}
/*
* Copy out the digest
*/
void SHA_224::copy_out(byte output[])
{
for(u32bit j = 0; j != OUTPUT_LENGTH; j += 4)
store_be(digest[j/4], output + j);
}
/*
* Clear memory of sensitive data
*/
void SHA_224::clear()
{
MDx_HashFunction::clear();
zeroise(W);
digest[0] = 0xC1059ED8;
digest[1] = 0x367CD507;
digest[2] = 0x3070DD17;
digest[3] = 0xF70E5939;
digest[4] = 0xFFC00B31;
digest[5] = 0x68581511;
digest[6] = 0x64F98FA7;
digest[7] = 0xBEFA4FA4;
}
/*
* SHA-256 compression function
*/
void SHA_256::compress_n(const byte input[], u32bit blocks)
{
sha2_32_compress(W, digest, input, blocks);
}
/*
* Copy out the digest
*/
void SHA_256::copy_out(byte output[])
{
for(u32bit j = 0; j != OUTPUT_LENGTH; j += 4)
store_be(digest[j/4], output + j);
}
/*
* Clear memory of sensitive data
*/
void SHA_256::clear()
{
MDx_HashFunction::clear();
zeroise(W);
digest[0] = 0x6A09E667;
digest[1] = 0xBB67AE85;
digest[2] = 0x3C6EF372;
digest[3] = 0xA54FF53A;
digest[4] = 0x510E527F;
digest[5] = 0x9B05688C;
digest[6] = 0x1F83D9AB;
digest[7] = 0x5BE0CD19;
}
}
|
