1 // SPDX-License-Identifier: BSD-3-Clause
3 * Copyright (C) 2005, 2007 Olivier Gay <olivier.gay@a3.epfl.ch>
6 * FIPS 180-2 SHA-224/256/384/512 implementation
7 * Last update: 02/02/2007
8 * Issue date: 04/30/2005
13 #define SHFR(x, n) (x >> n)
14 #define ROTR(x, n) ((x >> n) | (x << ((sizeof(x) << 3) - n)))
15 #define ROTL(x, n) ((x << n) | (x >> ((sizeof(x) << 3) - n)))
16 #define CH(x, y, z) ((x & y) ^ (~x & z))
17 #define MAJ(x, y, z) ((x & y) ^ (x & z) ^ (y & z))
19 #define SHA256_F1(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
20 #define SHA256_F2(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
21 #define SHA256_F3(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHFR(x, 3))
22 #define SHA256_F4(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHFR(x, 10))
24 #define UNPACK32(x, str) \
26 *((str) + 3) = (uint8_t)((x)); \
27 *((str) + 2) = (uint8_t)((x) >> 8); \
28 *((str) + 1) = (uint8_t)((x) >> 16); \
29 *((str) + 0) = (uint8_t)((x) >> 24); \
32 #define UNPACK64(x, str) \
34 *((str) + 7) = (uint8_t)x; \
35 *((str) + 6) = (uint8_t)((uint64_t)x >> 8); \
36 *((str) + 5) = (uint8_t)((uint64_t)x >> 16); \
37 *((str) + 4) = (uint8_t)((uint64_t)x >> 24); \
38 *((str) + 3) = (uint8_t)((uint64_t)x >> 32); \
39 *((str) + 2) = (uint8_t)((uint64_t)x >> 40); \
40 *((str) + 1) = (uint8_t)((uint64_t)x >> 48); \
41 *((str) + 0) = (uint8_t)((uint64_t)x >> 56); \
44 #define PACK32(str, x) \
46 *(x) = ((uint32_t) * ((str) + 3)) | ((uint32_t) * ((str) + 2) << 8) | \
47 ((uint32_t) * ((str) + 1) << 16) | \
48 ((uint32_t) * ((str) + 0) << 24); \
51 /* Macros used for loops unrolling */
53 #define SHA256_SCR(i) \
54 { w[i] = SHA256_F4(w[i - 2]) + w[i - 7] + SHA256_F3(w[i - 15]) + w[i - 16]; }
56 #define SHA256_EXP(a, b, c, d, e, f, g, h, j) \
58 t1 = wv[h] + SHA256_F2(wv[e]) + CH(wv[e], wv[f], wv[g]) + sha256_k[j] + \
60 t2 = SHA256_F1(wv[a]) + MAJ(wv[a], wv[b], wv[c]); \
65 static const uint32_t sha256_h0[8] = {0x6a09e667,
74 static const uint32_t sha256_k[64] = {
75 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1,
76 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
77 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786,
78 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
79 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
80 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
81 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b,
82 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
83 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
84 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
85 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2};
87 /* SHA-256 implementation */
88 void avb_sha256_init(AvbSHA256Ctx* ctx) {
91 for (i = 0; i < 8; i++) {
92 ctx->h[i] = sha256_h0[i];
95 ctx->h[0] = sha256_h0[0];
96 ctx->h[1] = sha256_h0[1];
97 ctx->h[2] = sha256_h0[2];
98 ctx->h[3] = sha256_h0[3];
99 ctx->h[4] = sha256_h0[4];
100 ctx->h[5] = sha256_h0[5];
101 ctx->h[6] = sha256_h0[6];
102 ctx->h[7] = sha256_h0[7];
103 #endif /* !UNROLL_LOOPS */
109 static void SHA256_transform(AvbSHA256Ctx* ctx,
110 const uint8_t* message,
115 const unsigned char* sub_block;
122 for (i = 0; i < block_nb; i++) {
123 sub_block = message + (i << 6);
126 for (j = 0; j < 16; j++) {
127 PACK32(&sub_block[j << 2], &w[j]);
130 for (j = 16; j < 64; j++) {
134 for (j = 0; j < 8; j++) {
138 for (j = 0; j < 64; j++) {
139 t1 = wv[7] + SHA256_F2(wv[4]) + CH(wv[4], wv[5], wv[6]) + sha256_k[j] +
141 t2 = SHA256_F1(wv[0]) + MAJ(wv[0], wv[1], wv[2]);
152 for (j = 0; j < 8; j++) {
156 PACK32(&sub_block[0], &w[0]);
157 PACK32(&sub_block[4], &w[1]);
158 PACK32(&sub_block[8], &w[2]);
159 PACK32(&sub_block[12], &w[3]);
160 PACK32(&sub_block[16], &w[4]);
161 PACK32(&sub_block[20], &w[5]);
162 PACK32(&sub_block[24], &w[6]);
163 PACK32(&sub_block[28], &w[7]);
164 PACK32(&sub_block[32], &w[8]);
165 PACK32(&sub_block[36], &w[9]);
166 PACK32(&sub_block[40], &w[10]);
167 PACK32(&sub_block[44], &w[11]);
168 PACK32(&sub_block[48], &w[12]);
169 PACK32(&sub_block[52], &w[13]);
170 PACK32(&sub_block[56], &w[14]);
171 PACK32(&sub_block[60], &w[15]);
231 SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 0);
232 SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 1);
233 SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 2);
234 SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 3);
235 SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 4);
236 SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 5);
237 SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 6);
238 SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 7);
239 SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 8);
240 SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 9);
241 SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 10);
242 SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 11);
243 SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 12);
244 SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 13);
245 SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 14);
246 SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 15);
247 SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 16);
248 SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 17);
249 SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 18);
250 SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 19);
251 SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 20);
252 SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 21);
253 SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 22);
254 SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 23);
255 SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 24);
256 SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 25);
257 SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 26);
258 SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 27);
259 SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 28);
260 SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 29);
261 SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 30);
262 SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 31);
263 SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 32);
264 SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 33);
265 SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 34);
266 SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 35);
267 SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 36);
268 SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 37);
269 SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 38);
270 SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 39);
271 SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 40);
272 SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 41);
273 SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 42);
274 SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 43);
275 SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 44);
276 SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 45);
277 SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 46);
278 SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 47);
279 SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 48);
280 SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 49);
281 SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 50);
282 SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 51);
283 SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 52);
284 SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 53);
285 SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 54);
286 SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 55);
287 SHA256_EXP(0, 1, 2, 3, 4, 5, 6, 7, 56);
288 SHA256_EXP(7, 0, 1, 2, 3, 4, 5, 6, 57);
289 SHA256_EXP(6, 7, 0, 1, 2, 3, 4, 5, 58);
290 SHA256_EXP(5, 6, 7, 0, 1, 2, 3, 4, 59);
291 SHA256_EXP(4, 5, 6, 7, 0, 1, 2, 3, 60);
292 SHA256_EXP(3, 4, 5, 6, 7, 0, 1, 2, 61);
293 SHA256_EXP(2, 3, 4, 5, 6, 7, 0, 1, 62);
294 SHA256_EXP(1, 2, 3, 4, 5, 6, 7, 0, 63);
304 #endif /* !UNROLL_LOOPS */
308 void avb_sha256_update(AvbSHA256Ctx* ctx, const uint8_t* data, size_t len) {
310 size_t new_len, rem_len, tmp_len;
311 const uint8_t* shifted_data;
313 tmp_len = AVB_SHA256_BLOCK_SIZE - ctx->len;
314 rem_len = len < tmp_len ? len : tmp_len;
316 avb_memcpy(&ctx->block[ctx->len], data, rem_len);
318 if (ctx->len + len < AVB_SHA256_BLOCK_SIZE) {
323 new_len = len - rem_len;
324 block_nb = new_len / AVB_SHA256_BLOCK_SIZE;
326 shifted_data = data + rem_len;
328 SHA256_transform(ctx, ctx->block, 1);
329 SHA256_transform(ctx, shifted_data, block_nb);
331 rem_len = new_len % AVB_SHA256_BLOCK_SIZE;
333 avb_memcpy(ctx->block, &shifted_data[block_nb << 6], rem_len);
336 ctx->tot_len += (block_nb + 1) << 6;
339 uint8_t* avb_sha256_final(AvbSHA256Ctx* ctx) {
348 (1 + ((AVB_SHA256_BLOCK_SIZE - 9) < (ctx->len % AVB_SHA256_BLOCK_SIZE)));
350 len_b = (ctx->tot_len + ctx->len) << 3;
351 pm_len = block_nb << 6;
353 avb_memset(ctx->block + ctx->len, 0, pm_len - ctx->len);
354 ctx->block[ctx->len] = 0x80;
355 UNPACK64(len_b, ctx->block + pm_len - 8);
357 SHA256_transform(ctx, ctx->block, block_nb);
360 for (i = 0; i < 8; i++) {
361 UNPACK32(ctx->h[i], &ctx->buf[i << 2]);
364 UNPACK32(ctx->h[0], &ctx->buf[0]);
365 UNPACK32(ctx->h[1], &ctx->buf[4]);
366 UNPACK32(ctx->h[2], &ctx->buf[8]);
367 UNPACK32(ctx->h[3], &ctx->buf[12]);
368 UNPACK32(ctx->h[4], &ctx->buf[16]);
369 UNPACK32(ctx->h[5], &ctx->buf[20]);
370 UNPACK32(ctx->h[6], &ctx->buf[24]);
371 UNPACK32(ctx->h[7], &ctx->buf[28]);
372 #endif /* !UNROLL_LOOPS */