1 | /* |
2 | * FIPS-180-2 compliant SHA-256 implementation |
3 | * |
4 | * Copyright The Mbed TLS Contributors |
5 | * SPDX-License-Identifier: Apache-2.0 |
6 | * |
7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
8 | * not use this file except in compliance with the License. |
9 | * You may obtain a copy of the License at |
10 | * |
11 | * http://www.apache.org/licenses/LICENSE-2.0 |
12 | * |
13 | * Unless required by applicable law or agreed to in writing, software |
14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
16 | * See the License for the specific language governing permissions and |
17 | * limitations under the License. |
18 | */ |
19 | /* |
20 | * The SHA-256 Secure Hash Standard was published by NIST in 2002. |
21 | * |
22 | * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf |
23 | */ |
24 | |
25 | #include "common.h" |
26 | |
27 | #if defined(MBEDTLS_SHA256_C) |
28 | |
29 | #include "mbedtls/sha256.h" |
30 | #include "mbedtls/platform_util.h" |
31 | #include "mbedtls/error.h" |
32 | |
33 | #include <string.h> |
34 | |
35 | #include "mbedtls/platform.h" |
36 | |
37 | #define SHA256_VALIDATE_RET(cond) \ |
38 | MBEDTLS_INTERNAL_VALIDATE_RET(cond, MBEDTLS_ERR_SHA256_BAD_INPUT_DATA) |
39 | #define SHA256_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE(cond) |
40 | |
41 | #if !defined(MBEDTLS_SHA256_ALT) |
42 | |
43 | void mbedtls_sha256_init(mbedtls_sha256_context *ctx) |
44 | { |
45 | SHA256_VALIDATE(ctx != NULL); |
46 | |
47 | memset(ctx, 0, sizeof(mbedtls_sha256_context)); |
48 | } |
49 | |
50 | void mbedtls_sha256_free(mbedtls_sha256_context *ctx) |
51 | { |
52 | if (ctx == NULL) { |
53 | return; |
54 | } |
55 | |
56 | mbedtls_platform_zeroize(ctx, sizeof(mbedtls_sha256_context)); |
57 | } |
58 | |
59 | void mbedtls_sha256_clone(mbedtls_sha256_context *dst, |
60 | const mbedtls_sha256_context *src) |
61 | { |
62 | SHA256_VALIDATE(dst != NULL); |
63 | SHA256_VALIDATE(src != NULL); |
64 | |
65 | *dst = *src; |
66 | } |
67 | |
68 | /* |
69 | * SHA-256 context setup |
70 | */ |
71 | int mbedtls_sha256_starts_ret(mbedtls_sha256_context *ctx, int is224) |
72 | { |
73 | SHA256_VALIDATE_RET(ctx != NULL); |
74 | SHA256_VALIDATE_RET(is224 == 0 || is224 == 1); |
75 | |
76 | ctx->total[0] = 0; |
77 | ctx->total[1] = 0; |
78 | |
79 | if (is224 == 0) { |
80 | /* SHA-256 */ |
81 | ctx->state[0] = 0x6A09E667; |
82 | ctx->state[1] = 0xBB67AE85; |
83 | ctx->state[2] = 0x3C6EF372; |
84 | ctx->state[3] = 0xA54FF53A; |
85 | ctx->state[4] = 0x510E527F; |
86 | ctx->state[5] = 0x9B05688C; |
87 | ctx->state[6] = 0x1F83D9AB; |
88 | ctx->state[7] = 0x5BE0CD19; |
89 | } else { |
90 | /* SHA-224 */ |
91 | ctx->state[0] = 0xC1059ED8; |
92 | ctx->state[1] = 0x367CD507; |
93 | ctx->state[2] = 0x3070DD17; |
94 | ctx->state[3] = 0xF70E5939; |
95 | ctx->state[4] = 0xFFC00B31; |
96 | ctx->state[5] = 0x68581511; |
97 | ctx->state[6] = 0x64F98FA7; |
98 | ctx->state[7] = 0xBEFA4FA4; |
99 | } |
100 | |
101 | ctx->is224 = is224; |
102 | |
103 | return 0; |
104 | } |
105 | |
106 | #if !defined(MBEDTLS_DEPRECATED_REMOVED) |
107 | void mbedtls_sha256_starts(mbedtls_sha256_context *ctx, |
108 | int is224) |
109 | { |
110 | mbedtls_sha256_starts_ret(ctx, is224); |
111 | } |
112 | #endif |
113 | |
114 | #if !defined(MBEDTLS_SHA256_PROCESS_ALT) |
115 | static const uint32_t K[] = |
116 | { |
117 | 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, |
118 | 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, |
119 | 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, |
120 | 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, |
121 | 0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC, |
122 | 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, |
123 | 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, |
124 | 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967, |
125 | 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, |
126 | 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, |
127 | 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, |
128 | 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, |
129 | 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, |
130 | 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, |
131 | 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, |
132 | 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2, |
133 | }; |
134 | |
135 | #define SHR(x, n) (((x) & 0xFFFFFFFF) >> (n)) |
136 | #define ROTR(x, n) (SHR(x, n) | ((x) << (32 - (n)))) |
137 | |
138 | #define S0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3)) |
139 | #define S1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10)) |
140 | |
141 | #define S2(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22)) |
142 | #define S3(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25)) |
143 | |
144 | #define F0(x, y, z) (((x) & (y)) | ((z) & ((x) | (y)))) |
145 | #define F1(x, y, z) ((z) ^ ((x) & ((y) ^ (z)))) |
146 | |
147 | #define R(t) \ |
148 | ( \ |
149 | local.W[t] = S1(local.W[(t) - 2]) + local.W[(t) - 7] + \ |
150 | S0(local.W[(t) - 15]) + local.W[(t) - 16] \ |
151 | ) |
152 | |
153 | #define P(a, b, c, d, e, f, g, h, x, K) \ |
154 | do \ |
155 | { \ |
156 | local.temp1 = (h) + S3(e) + F1((e), (f), (g)) + (K) + (x); \ |
157 | local.temp2 = S2(a) + F0((a), (b), (c)); \ |
158 | (d) += local.temp1; (h) = local.temp1 + local.temp2; \ |
159 | } while (0) |
160 | |
161 | int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx, |
162 | const unsigned char data[64]) |
163 | { |
164 | struct { |
165 | uint32_t temp1, temp2, W[64]; |
166 | uint32_t A[8]; |
167 | } local; |
168 | |
169 | unsigned int i; |
170 | |
171 | SHA256_VALIDATE_RET(ctx != NULL); |
172 | SHA256_VALIDATE_RET((const unsigned char *) data != NULL); |
173 | |
174 | for (i = 0; i < 8; i++) { |
175 | local.A[i] = ctx->state[i]; |
176 | } |
177 | |
178 | #if defined(MBEDTLS_SHA256_SMALLER) |
179 | for (i = 0; i < 64; i++) { |
180 | if (i < 16) { |
181 | local.W[i] = MBEDTLS_GET_UINT32_BE(data, 4 * i); |
182 | } else { |
183 | R(i); |
184 | } |
185 | |
186 | P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4], |
187 | local.A[5], local.A[6], local.A[7], local.W[i], K[i]); |
188 | |
189 | local.temp1 = local.A[7]; local.A[7] = local.A[6]; |
190 | local.A[6] = local.A[5]; local.A[5] = local.A[4]; |
191 | local.A[4] = local.A[3]; local.A[3] = local.A[2]; |
192 | local.A[2] = local.A[1]; local.A[1] = local.A[0]; |
193 | local.A[0] = local.temp1; |
194 | } |
195 | #else /* MBEDTLS_SHA256_SMALLER */ |
196 | for (i = 0; i < 16; i++) { |
197 | local.W[i] = MBEDTLS_GET_UINT32_BE(data, 4 * i); |
198 | } |
199 | |
200 | for (i = 0; i < 16; i += 8) { |
201 | P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4], |
202 | local.A[5], local.A[6], local.A[7], local.W[i+0], K[i+0]); |
203 | P(local.A[7], local.A[0], local.A[1], local.A[2], local.A[3], |
204 | local.A[4], local.A[5], local.A[6], local.W[i+1], K[i+1]); |
205 | P(local.A[6], local.A[7], local.A[0], local.A[1], local.A[2], |
206 | local.A[3], local.A[4], local.A[5], local.W[i+2], K[i+2]); |
207 | P(local.A[5], local.A[6], local.A[7], local.A[0], local.A[1], |
208 | local.A[2], local.A[3], local.A[4], local.W[i+3], K[i+3]); |
209 | P(local.A[4], local.A[5], local.A[6], local.A[7], local.A[0], |
210 | local.A[1], local.A[2], local.A[3], local.W[i+4], K[i+4]); |
211 | P(local.A[3], local.A[4], local.A[5], local.A[6], local.A[7], |
212 | local.A[0], local.A[1], local.A[2], local.W[i+5], K[i+5]); |
213 | P(local.A[2], local.A[3], local.A[4], local.A[5], local.A[6], |
214 | local.A[7], local.A[0], local.A[1], local.W[i+6], K[i+6]); |
215 | P(local.A[1], local.A[2], local.A[3], local.A[4], local.A[5], |
216 | local.A[6], local.A[7], local.A[0], local.W[i+7], K[i+7]); |
217 | } |
218 | |
219 | for (i = 16; i < 64; i += 8) { |
220 | P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4], |
221 | local.A[5], local.A[6], local.A[7], R(i+0), K[i+0]); |
222 | P(local.A[7], local.A[0], local.A[1], local.A[2], local.A[3], |
223 | local.A[4], local.A[5], local.A[6], R(i+1), K[i+1]); |
224 | P(local.A[6], local.A[7], local.A[0], local.A[1], local.A[2], |
225 | local.A[3], local.A[4], local.A[5], R(i+2), K[i+2]); |
226 | P(local.A[5], local.A[6], local.A[7], local.A[0], local.A[1], |
227 | local.A[2], local.A[3], local.A[4], R(i+3), K[i+3]); |
228 | P(local.A[4], local.A[5], local.A[6], local.A[7], local.A[0], |
229 | local.A[1], local.A[2], local.A[3], R(i+4), K[i+4]); |
230 | P(local.A[3], local.A[4], local.A[5], local.A[6], local.A[7], |
231 | local.A[0], local.A[1], local.A[2], R(i+5), K[i+5]); |
232 | P(local.A[2], local.A[3], local.A[4], local.A[5], local.A[6], |
233 | local.A[7], local.A[0], local.A[1], R(i+6), K[i+6]); |
234 | P(local.A[1], local.A[2], local.A[3], local.A[4], local.A[5], |
235 | local.A[6], local.A[7], local.A[0], R(i+7), K[i+7]); |
236 | } |
237 | #endif /* MBEDTLS_SHA256_SMALLER */ |
238 | |
239 | for (i = 0; i < 8; i++) { |
240 | ctx->state[i] += local.A[i]; |
241 | } |
242 | |
243 | /* Zeroise buffers and variables to clear sensitive data from memory. */ |
244 | mbedtls_platform_zeroize(&local, sizeof(local)); |
245 | |
246 | return 0; |
247 | } |
248 | |
249 | #if !defined(MBEDTLS_DEPRECATED_REMOVED) |
250 | void mbedtls_sha256_process(mbedtls_sha256_context *ctx, |
251 | const unsigned char data[64]) |
252 | { |
253 | mbedtls_internal_sha256_process(ctx, data); |
254 | } |
255 | #endif |
256 | #endif /* !MBEDTLS_SHA256_PROCESS_ALT */ |
257 | |
258 | /* |
259 | * SHA-256 process buffer |
260 | */ |
261 | int mbedtls_sha256_update_ret(mbedtls_sha256_context *ctx, |
262 | const unsigned char *input, |
263 | size_t ilen) |
264 | { |
265 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
266 | size_t fill; |
267 | uint32_t left; |
268 | |
269 | SHA256_VALIDATE_RET(ctx != NULL); |
270 | SHA256_VALIDATE_RET(ilen == 0 || input != NULL); |
271 | |
272 | if (ilen == 0) { |
273 | return 0; |
274 | } |
275 | |
276 | left = ctx->total[0] & 0x3F; |
277 | fill = 64 - left; |
278 | |
279 | ctx->total[0] += (uint32_t) ilen; |
280 | ctx->total[0] &= 0xFFFFFFFF; |
281 | |
282 | if (ctx->total[0] < (uint32_t) ilen) { |
283 | ctx->total[1]++; |
284 | } |
285 | |
286 | if (left && ilen >= fill) { |
287 | memcpy((void *) (ctx->buffer + left), input, fill); |
288 | |
289 | if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0) { |
290 | return ret; |
291 | } |
292 | |
293 | input += fill; |
294 | ilen -= fill; |
295 | left = 0; |
296 | } |
297 | |
298 | while (ilen >= 64) { |
299 | if ((ret = mbedtls_internal_sha256_process(ctx, input)) != 0) { |
300 | return ret; |
301 | } |
302 | |
303 | input += 64; |
304 | ilen -= 64; |
305 | } |
306 | |
307 | if (ilen > 0) { |
308 | memcpy((void *) (ctx->buffer + left), input, ilen); |
309 | } |
310 | |
311 | return 0; |
312 | } |
313 | |
314 | #if !defined(MBEDTLS_DEPRECATED_REMOVED) |
315 | void mbedtls_sha256_update(mbedtls_sha256_context *ctx, |
316 | const unsigned char *input, |
317 | size_t ilen) |
318 | { |
319 | mbedtls_sha256_update_ret(ctx, input, ilen); |
320 | } |
321 | #endif |
322 | |
323 | /* |
324 | * SHA-256 final digest |
325 | */ |
326 | int mbedtls_sha256_finish_ret(mbedtls_sha256_context *ctx, |
327 | unsigned char output[32]) |
328 | { |
329 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
330 | uint32_t used; |
331 | uint32_t high, low; |
332 | |
333 | SHA256_VALIDATE_RET(ctx != NULL); |
334 | SHA256_VALIDATE_RET((unsigned char *) output != NULL); |
335 | |
336 | /* |
337 | * Add padding: 0x80 then 0x00 until 8 bytes remain for the length |
338 | */ |
339 | used = ctx->total[0] & 0x3F; |
340 | |
341 | ctx->buffer[used++] = 0x80; |
342 | |
343 | if (used <= 56) { |
344 | /* Enough room for padding + length in current block */ |
345 | memset(ctx->buffer + used, 0, 56 - used); |
346 | } else { |
347 | /* We'll need an extra block */ |
348 | memset(ctx->buffer + used, 0, 64 - used); |
349 | |
350 | if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0) { |
351 | return ret; |
352 | } |
353 | |
354 | memset(ctx->buffer, 0, 56); |
355 | } |
356 | |
357 | /* |
358 | * Add message length |
359 | */ |
360 | high = (ctx->total[0] >> 29) |
361 | | (ctx->total[1] << 3); |
362 | low = (ctx->total[0] << 3); |
363 | |
364 | MBEDTLS_PUT_UINT32_BE(high, ctx->buffer, 56); |
365 | MBEDTLS_PUT_UINT32_BE(low, ctx->buffer, 60); |
366 | |
367 | if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0) { |
368 | return ret; |
369 | } |
370 | |
371 | /* |
372 | * Output final state |
373 | */ |
374 | MBEDTLS_PUT_UINT32_BE(ctx->state[0], output, 0); |
375 | MBEDTLS_PUT_UINT32_BE(ctx->state[1], output, 4); |
376 | MBEDTLS_PUT_UINT32_BE(ctx->state[2], output, 8); |
377 | MBEDTLS_PUT_UINT32_BE(ctx->state[3], output, 12); |
378 | MBEDTLS_PUT_UINT32_BE(ctx->state[4], output, 16); |
379 | MBEDTLS_PUT_UINT32_BE(ctx->state[5], output, 20); |
380 | MBEDTLS_PUT_UINT32_BE(ctx->state[6], output, 24); |
381 | |
382 | if (ctx->is224 == 0) { |
383 | MBEDTLS_PUT_UINT32_BE(ctx->state[7], output, 28); |
384 | } |
385 | |
386 | return 0; |
387 | } |
388 | |
389 | #if !defined(MBEDTLS_DEPRECATED_REMOVED) |
390 | void mbedtls_sha256_finish(mbedtls_sha256_context *ctx, |
391 | unsigned char output[32]) |
392 | { |
393 | mbedtls_sha256_finish_ret(ctx, output); |
394 | } |
395 | #endif |
396 | |
397 | #endif /* !MBEDTLS_SHA256_ALT */ |
398 | |
399 | /* |
400 | * output = SHA-256( input buffer ) |
401 | */ |
402 | int mbedtls_sha256_ret(const unsigned char *input, |
403 | size_t ilen, |
404 | unsigned char output[32], |
405 | int is224) |
406 | { |
407 | int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
408 | mbedtls_sha256_context ctx; |
409 | |
410 | SHA256_VALIDATE_RET(is224 == 0 || is224 == 1); |
411 | SHA256_VALIDATE_RET(ilen == 0 || input != NULL); |
412 | SHA256_VALIDATE_RET((unsigned char *) output != NULL); |
413 | |
414 | mbedtls_sha256_init(&ctx); |
415 | |
416 | if ((ret = mbedtls_sha256_starts_ret(&ctx, is224)) != 0) { |
417 | goto exit; |
418 | } |
419 | |
420 | if ((ret = mbedtls_sha256_update_ret(&ctx, input, ilen)) != 0) { |
421 | goto exit; |
422 | } |
423 | |
424 | if ((ret = mbedtls_sha256_finish_ret(&ctx, output)) != 0) { |
425 | goto exit; |
426 | } |
427 | |
428 | exit: |
429 | mbedtls_sha256_free(&ctx); |
430 | |
431 | return ret; |
432 | } |
433 | |
434 | #if !defined(MBEDTLS_DEPRECATED_REMOVED) |
435 | void mbedtls_sha256(const unsigned char *input, |
436 | size_t ilen, |
437 | unsigned char output[32], |
438 | int is224) |
439 | { |
440 | mbedtls_sha256_ret(input, ilen, output, is224); |
441 | } |
442 | #endif |
443 | |
444 | #if defined(MBEDTLS_SELF_TEST) |
445 | /* |
446 | * FIPS-180-2 test vectors |
447 | */ |
448 | static const unsigned char sha256_test_buf[3][57] = |
449 | { |
450 | { "abc" }, |
451 | { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" }, |
452 | { "" } |
453 | }; |
454 | |
455 | static const size_t sha256_test_buflen[3] = |
456 | { |
457 | 3, 56, 1000 |
458 | }; |
459 | |
460 | static const unsigned char sha256_test_sum[6][32] = |
461 | { |
462 | /* |
463 | * SHA-224 test vectors |
464 | */ |
465 | { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22, |
466 | 0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3, |
467 | 0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7, |
468 | 0xE3, 0x6C, 0x9D, 0xA7 }, |
469 | { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC, |
470 | 0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50, |
471 | 0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19, |
472 | 0x52, 0x52, 0x25, 0x25 }, |
473 | { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8, |
474 | 0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B, |
475 | 0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE, |
476 | 0x4E, 0xE7, 0xAD, 0x67 }, |
477 | |
478 | /* |
479 | * SHA-256 test vectors |
480 | */ |
481 | { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA, |
482 | 0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23, |
483 | 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C, |
484 | 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD }, |
485 | { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8, |
486 | 0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39, |
487 | 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67, |
488 | 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 }, |
489 | { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92, |
490 | 0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67, |
491 | 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E, |
492 | 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 } |
493 | }; |
494 | |
495 | /* |
496 | * Checkup routine |
497 | */ |
498 | int mbedtls_sha256_self_test(int verbose) |
499 | { |
500 | int i, j, k, buflen, ret = 0; |
501 | unsigned char *buf; |
502 | unsigned char sha256sum[32]; |
503 | mbedtls_sha256_context ctx; |
504 | |
505 | buf = mbedtls_calloc(1024, sizeof(unsigned char)); |
506 | if (NULL == buf) { |
507 | if (verbose != 0) { |
508 | mbedtls_printf("Buffer allocation failed\n" ); |
509 | } |
510 | |
511 | return 1; |
512 | } |
513 | |
514 | mbedtls_sha256_init(&ctx); |
515 | |
516 | for (i = 0; i < 6; i++) { |
517 | j = i % 3; |
518 | k = i < 3; |
519 | |
520 | if (verbose != 0) { |
521 | mbedtls_printf(" SHA-%d test #%d: " , 256 - k * 32, j + 1); |
522 | } |
523 | |
524 | if ((ret = mbedtls_sha256_starts_ret(&ctx, k)) != 0) { |
525 | goto fail; |
526 | } |
527 | |
528 | if (j == 2) { |
529 | memset(buf, 'a', buflen = 1000); |
530 | |
531 | for (j = 0; j < 1000; j++) { |
532 | ret = mbedtls_sha256_update_ret(&ctx, buf, buflen); |
533 | if (ret != 0) { |
534 | goto fail; |
535 | } |
536 | } |
537 | |
538 | } else { |
539 | ret = mbedtls_sha256_update_ret(&ctx, sha256_test_buf[j], |
540 | sha256_test_buflen[j]); |
541 | if (ret != 0) { |
542 | goto fail; |
543 | } |
544 | } |
545 | |
546 | if ((ret = mbedtls_sha256_finish_ret(&ctx, sha256sum)) != 0) { |
547 | goto fail; |
548 | } |
549 | |
550 | |
551 | if (memcmp(sha256sum, sha256_test_sum[i], 32 - k * 4) != 0) { |
552 | ret = 1; |
553 | goto fail; |
554 | } |
555 | |
556 | if (verbose != 0) { |
557 | mbedtls_printf("passed\n" ); |
558 | } |
559 | } |
560 | |
561 | if (verbose != 0) { |
562 | mbedtls_printf("\n" ); |
563 | } |
564 | |
565 | goto exit; |
566 | |
567 | fail: |
568 | if (verbose != 0) { |
569 | mbedtls_printf("failed\n" ); |
570 | } |
571 | |
572 | exit: |
573 | mbedtls_sha256_free(&ctx); |
574 | mbedtls_free(buf); |
575 | |
576 | return ret; |
577 | } |
578 | |
579 | #endif /* MBEDTLS_SELF_TEST */ |
580 | |
581 | #endif /* MBEDTLS_SHA256_C */ |
582 | |