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
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
|
/*
* FIPS-180-2 compliant SHA-256 implementation
*
* Copyright (C) 2001-2003 Christophe Devine
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef USE_HOSTCC
#include <common.h>
#include <linux/string.h>
#else
#include <string.h>
#endif /* USE_HOSTCC */
#include <watchdog.h>
#include <u-boot/sha256.h>
/*
* 32-bit integer manipulation macros (big endian)
*/
#ifndef GET_UINT32_BE
#define GET_UINT32_BE(n,b,i) { \
(n) = ( (unsigned long) (b)[(i) ] << 24 ) \
| ( (unsigned long) (b)[(i) + 1] << 16 ) \
| ( (unsigned long) (b)[(i) + 2] << 8 ) \
| ( (unsigned long) (b)[(i) + 3] ); \
}
#endif
#ifndef PUT_UINT32_BE
#define PUT_UINT32_BE(n,b,i) { \
(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
(b)[(i) + 3] = (unsigned char) ( (n) ); \
}
#endif
void sha256_starts(sha256_context * ctx)
{
ctx->total[0] = 0;
ctx->total[1] = 0;
ctx->state[0] = 0x6A09E667;
ctx->state[1] = 0xBB67AE85;
ctx->state[2] = 0x3C6EF372;
ctx->state[3] = 0xA54FF53A;
ctx->state[4] = 0x510E527F;
ctx->state[5] = 0x9B05688C;
ctx->state[6] = 0x1F83D9AB;
ctx->state[7] = 0x5BE0CD19;
}
static void sha256_process(sha256_context *ctx, const uint8_t data[64])
{
uint32_t temp1, temp2;
uint32_t W[64];
uint32_t A, B, C, D, E, F, G, H;
GET_UINT32_BE(W[0], data, 0);
GET_UINT32_BE(W[1], data, 4);
GET_UINT32_BE(W[2], data, 8);
GET_UINT32_BE(W[3], data, 12);
GET_UINT32_BE(W[4], data, 16);
GET_UINT32_BE(W[5], data, 20);
GET_UINT32_BE(W[6], data, 24);
GET_UINT32_BE(W[7], data, 28);
GET_UINT32_BE(W[8], data, 32);
GET_UINT32_BE(W[9], data, 36);
GET_UINT32_BE(W[10], data, 40);
GET_UINT32_BE(W[11], data, 44);
GET_UINT32_BE(W[12], data, 48);
GET_UINT32_BE(W[13], data, 52);
GET_UINT32_BE(W[14], data, 56);
GET_UINT32_BE(W[15], data, 60);
#define SHR(x,n) ((x & 0xFFFFFFFF) >> n)
#define ROTR(x,n) (SHR(x,n) | (x << (32 - n)))
#define S0(x) (ROTR(x, 7) ^ ROTR(x,18) ^ SHR(x, 3))
#define S1(x) (ROTR(x,17) ^ ROTR(x,19) ^ SHR(x,10))
#define S2(x) (ROTR(x, 2) ^ ROTR(x,13) ^ ROTR(x,22))
#define S3(x) (ROTR(x, 6) ^ ROTR(x,11) ^ ROTR(x,25))
#define F0(x,y,z) ((x & y) | (z & (x | y)))
#define F1(x,y,z) (z ^ (x & (y ^ z)))
#define R(t) \
( \
W[t] = S1(W[t - 2]) + W[t - 7] + \
S0(W[t - 15]) + W[t - 16] \
)
#define P(a,b,c,d,e,f,g,h,x,K) { \
temp1 = h + S3(e) + F1(e,f,g) + K + x; \
temp2 = S2(a) + F0(a,b,c); \
d += temp1; h = temp1 + temp2; \
}
A = ctx->state[0];
B = ctx->state[1];
C = ctx->state[2];
D = ctx->state[3];
E = ctx->state[4];
F = ctx->state[5];
G = ctx->state[6];
H = ctx->state[7];
P(A, B, C, D, E, F, G, H, W[0], 0x428A2F98);
P(H, A, B, C, D, E, F, G, W[1], 0x71374491);
P(G, H, A, B, C, D, E, F, W[2], 0xB5C0FBCF);
P(F, G, H, A, B, C, D, E, W[3], 0xE9B5DBA5);
P(E, F, G, H, A, B, C, D, W[4], 0x3956C25B);
P(D, E, F, G, H, A, B, C, W[5], 0x59F111F1);
P(C, D, E, F, G, H, A, B, W[6], 0x923F82A4);
P(B, C, D, E, F, G, H, A, W[7], 0xAB1C5ED5);
P(A, B, C, D, E, F, G, H, W[8], 0xD807AA98);
P(H, A, B, C, D, E, F, G, W[9], 0x12835B01);
P(G, H, A, B, C, D, E, F, W[10], 0x243185BE);
P(F, G, H, A, B, C, D, E, W[11], 0x550C7DC3);
P(E, F, G, H, A, B, C, D, W[12], 0x72BE5D74);
P(D, E, F, G, H, A, B, C, W[13], 0x80DEB1FE);
P(C, D, E, F, G, H, A, B, W[14], 0x9BDC06A7);
P(B, C, D, E, F, G, H, A, W[15], 0xC19BF174);
P(A, B, C, D, E, F, G, H, R(16), 0xE49B69C1);
P(H, A, B, C, D, E, F, G, R(17), 0xEFBE4786);
P(G, H, A, B, C, D, E, F, R(18), 0x0FC19DC6);
P(F, G, H, A, B, C, D, E, R(19), 0x240CA1CC);
P(E, F, G, H, A, B, C, D, R(20), 0x2DE92C6F);
P(D, E, F, G, H, A, B, C, R(21), 0x4A7484AA);
P(C, D, E, F, G, H, A, B, R(22), 0x5CB0A9DC);
P(B, C, D, E, F, G, H, A, R(23), 0x76F988DA);
P(A, B, C, D, E, F, G, H, R(24), 0x983E5152);
P(H, A, B, C, D, E, F, G, R(25), 0xA831C66D);
P(G, H, A, B, C, D, E, F, R(26), 0xB00327C8);
P(F, G, H, A, B, C, D, E, R(27), 0xBF597FC7);
P(E, F, G, H, A, B, C, D, R(28), 0xC6E00BF3);
P(D, E, F, G, H, A, B, C, R(29), 0xD5A79147);
P(C, D, E, F, G, H, A, B, R(30), 0x06CA6351);
P(B, C, D, E, F, G, H, A, R(31), 0x14292967);
P(A, B, C, D, E, F, G, H, R(32), 0x27B70A85);
P(H, A, B, C, D, E, F, G, R(33), 0x2E1B2138);
P(G, H, A, B, C, D, E, F, R(34), 0x4D2C6DFC);
P(F, G, H, A, B, C, D, E, R(35), 0x53380D13);
P(E, F, G, H, A, B, C, D, R(36), 0x650A7354);
P(D, E, F, G, H, A, B, C, R(37), 0x766A0ABB);
P(C, D, E, F, G, H, A, B, R(38), 0x81C2C92E);
P(B, C, D, E, F, G, H, A, R(39), 0x92722C85);
P(A, B, C, D, E, F, G, H, R(40), 0xA2BFE8A1);
P(H, A, B, C, D, E, F, G, R(41), 0xA81A664B);
P(G, H, A, B, C, D, E, F, R(42), 0xC24B8B70);
P(F, G, H, A, B, C, D, E, R(43), 0xC76C51A3);
P(E, F, G, H, A, B, C, D, R(44), 0xD192E819);
P(D, E, F, G, H, A, B, C, R(45), 0xD6990624);
P(C, D, E, F, G, H, A, B, R(46), 0xF40E3585);
P(B, C, D, E, F, G, H, A, R(47), 0x106AA070);
P(A, B, C, D, E, F, G, H, R(48), 0x19A4C116);
P(H, A, B, C, D, E, F, G, R(49), 0x1E376C08);
P(G, H, A, B, C, D, E, F, R(50), 0x2748774C);
P(F, G, H, A, B, C, D, E, R(51), 0x34B0BCB5);
P(E, F, G, H, A, B, C, D, R(52), 0x391C0CB3);
P(D, E, F, G, H, A, B, C, R(53), 0x4ED8AA4A);
P(C, D, E, F, G, H, A, B, R(54), 0x5B9CCA4F);
P(B, C, D, E, F, G, H, A, R(55), 0x682E6FF3);
P(A, B, C, D, E, F, G, H, R(56), 0x748F82EE);
P(H, A, B, C, D, E, F, G, R(57), 0x78A5636F);
P(G, H, A, B, C, D, E, F, R(58), 0x84C87814);
P(F, G, H, A, B, C, D, E, R(59), 0x8CC70208);
P(E, F, G, H, A, B, C, D, R(60), 0x90BEFFFA);
P(D, E, F, G, H, A, B, C, R(61), 0xA4506CEB);
P(C, D, E, F, G, H, A, B, R(62), 0xBEF9A3F7);
P(B, C, D, E, F, G, H, A, R(63), 0xC67178F2);
ctx->state[0] += A;
ctx->state[1] += B;
ctx->state[2] += C;
ctx->state[3] += D;
ctx->state[4] += E;
ctx->state[5] += F;
ctx->state[6] += G;
ctx->state[7] += H;
}
void sha256_update(sha256_context *ctx, const uint8_t *input, uint32_t length)
{
uint32_t left, fill;
if (!length)
return;
left = ctx->total[0] & 0x3F;
fill = 64 - left;
ctx->total[0] += length;
ctx->total[0] &= 0xFFFFFFFF;
if (ctx->total[0] < length)
ctx->total[1]++;
if (left && length >= fill) {
memcpy((void *) (ctx->buffer + left), (void *) input, fill);
sha256_process(ctx, ctx->buffer);
length -= fill;
input += fill;
left = 0;
}
while (length >= 64) {
sha256_process(ctx, input);
length -= 64;
input += 64;
}
if (length)
memcpy((void *) (ctx->buffer + left), (void *) input, length);
}
static uint8_t sha256_padding[64] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
void sha256_finish(sha256_context * ctx, uint8_t digest[32])
{
uint32_t last, padn;
uint32_t high, low;
uint8_t msglen[8];
high = ((ctx->total[0] >> 29)
| (ctx->total[1] << 3));
low = (ctx->total[0] << 3);
PUT_UINT32_BE(high, msglen, 0);
PUT_UINT32_BE(low, msglen, 4);
last = ctx->total[0] & 0x3F;
padn = (last < 56) ? (56 - last) : (120 - last);
sha256_update(ctx, sha256_padding, padn);
sha256_update(ctx, msglen, 8);
PUT_UINT32_BE(ctx->state[0], digest, 0);
PUT_UINT32_BE(ctx->state[1], digest, 4);
PUT_UINT32_BE(ctx->state[2], digest, 8);
PUT_UINT32_BE(ctx->state[3], digest, 12);
PUT_UINT32_BE(ctx->state[4], digest, 16);
PUT_UINT32_BE(ctx->state[5], digest, 20);
PUT_UINT32_BE(ctx->state[6], digest, 24);
PUT_UINT32_BE(ctx->state[7], digest, 28);
}
/*
* Output = SHA-256( input buffer ). Trigger the watchdog every 'chunk_sz'
* bytes of input processed.
*/
void sha256_csum_wd(const unsigned char *input, unsigned int ilen,
unsigned char *output, unsigned int chunk_sz)
{
sha256_context ctx;
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
const unsigned char *end;
unsigned char *curr;
int chunk;
#endif
sha256_starts(&ctx);
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
curr = (unsigned char *)input;
end = input + ilen;
while (curr < end) {
chunk = end - curr;
if (chunk > chunk_sz)
chunk = chunk_sz;
sha256_update(&ctx, curr, chunk);
curr += chunk;
WATCHDOG_RESET();
}
#else
sha256_update(&ctx, input, ilen);
#endif
sha256_finish(&ctx, output);
}
|
