| /* |
| * FIPS-180-2 compliant SHA-256 implementation |
| * |
| * Copyright The Mbed TLS Contributors |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may |
| * not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * The SHA-256 Secure Hash Standard was published by NIST in 2002. |
| * |
| * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf |
| */ |
| |
| #include "common.h" |
| |
| #if defined(MBEDTLS_SHA256_C) |
| |
| # include "mbedtls/sha256.h" |
| # include "mbedtls/platform_util.h" |
| # include "mbedtls/error.h" |
| |
| # include <string.h> |
| |
| # if defined(MBEDTLS_SELF_TEST) |
| # if defined(MBEDTLS_PLATFORM_C) |
| # include "mbedtls/platform.h" |
| # else |
| # include <stdio.h> |
| # include <stdlib.h> |
| # define mbedtls_printf printf |
| # define mbedtls_calloc calloc |
| # define mbedtls_free free |
| # endif /* MBEDTLS_PLATFORM_C */ |
| # endif /* MBEDTLS_SELF_TEST */ |
| |
| # define SHA256_VALIDATE_RET(cond) \ |
| MBEDTLS_INTERNAL_VALIDATE_RET(cond, MBEDTLS_ERR_SHA256_BAD_INPUT_DATA) |
| # define SHA256_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE(cond) |
| |
| # if !defined(MBEDTLS_SHA256_ALT) |
| |
| /* |
| * 32-bit integer manipulation macros (big endian) |
| */ |
| # ifndef GET_UINT32_BE |
| # define GET_UINT32_BE(n, b, i) \ |
| do { \ |
| (n) = ((uint32_t)(b)[(i)] << 24) | \ |
| ((uint32_t)(b)[(i) + 1] << 16) | \ |
| ((uint32_t)(b)[(i) + 2] << 8) | \ |
| ((uint32_t)(b)[(i) + 3]); \ |
| } while (0) |
| # endif |
| |
| # ifndef PUT_UINT32_BE |
| # define PUT_UINT32_BE(n, b, i) \ |
| do { \ |
| (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)); \ |
| } while (0) |
| # endif |
| |
| void mbedtls_sha256_init(mbedtls_sha256_context *ctx) |
| { |
| SHA256_VALIDATE(ctx != NULL); |
| |
| memset(ctx, 0, sizeof(mbedtls_sha256_context)); |
| } |
| |
| void mbedtls_sha256_free(mbedtls_sha256_context *ctx) |
| { |
| if (ctx == NULL) |
| return; |
| |
| mbedtls_platform_zeroize(ctx, sizeof(mbedtls_sha256_context)); |
| } |
| |
| void mbedtls_sha256_clone(mbedtls_sha256_context *dst, |
| const mbedtls_sha256_context *src) |
| { |
| SHA256_VALIDATE(dst != NULL); |
| SHA256_VALIDATE(src != NULL); |
| |
| *dst = *src; |
| } |
| |
| /* |
| * SHA-256 context setup |
| */ |
| int mbedtls_sha256_starts(mbedtls_sha256_context *ctx, int is224) |
| { |
| SHA256_VALIDATE_RET(ctx != NULL); |
| |
| # if defined(MBEDTLS_SHA224_C) |
| SHA256_VALIDATE_RET(is224 == 0 || is224 == 1); |
| # else |
| SHA256_VALIDATE_RET(is224 == 0); |
| # endif |
| |
| ctx->total[0] = 0; |
| ctx->total[1] = 0; |
| |
| if (is224 == 0) { |
| /* SHA-256 */ |
| 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; |
| } else { |
| # if defined(MBEDTLS_SHA224_C) |
| /* SHA-224 */ |
| ctx->state[0] = 0xC1059ED8; |
| ctx->state[1] = 0x367CD507; |
| ctx->state[2] = 0x3070DD17; |
| ctx->state[3] = 0xF70E5939; |
| ctx->state[4] = 0xFFC00B31; |
| ctx->state[5] = 0x68581511; |
| ctx->state[6] = 0x64F98FA7; |
| ctx->state[7] = 0xBEFA4FA4; |
| # endif |
| } |
| |
| ctx->is224 = is224; |
| |
| return 0; |
| } |
| |
| # if !defined(MBEDTLS_SHA256_PROCESS_ALT) |
| static const uint32_t K[] = { |
| 0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, |
| 0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, |
| 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786, |
| 0x0FC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, |
| 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, |
| 0x06CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, |
| 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B, |
| 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, |
| 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, |
| 0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, |
| 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2, |
| }; |
| |
| # 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) \ |
| (local.W[t] = S1(local.W[(t)-2]) + local.W[(t)-7] + \ |
| S0(local.W[(t)-15]) + local.W[(t)-16]) |
| |
| # define P(a, b, c, d, e, f, g, h, x, K) \ |
| do { \ |
| local.temp1 = (h) + S3(e) + F1((e), (f), (g)) + (K) + (x); \ |
| local.temp2 = S2(a) + F0((a), (b), (c)); \ |
| (d) += local.temp1; \ |
| (h) = local.temp1 + local.temp2; \ |
| } while (0) |
| |
| int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx, |
| const unsigned char data[64]) |
| { |
| struct { |
| uint32_t temp1, temp2, W[64]; |
| uint32_t A[8]; |
| } local; |
| |
| unsigned int i; |
| |
| SHA256_VALIDATE_RET(ctx != NULL); |
| SHA256_VALIDATE_RET((const unsigned char *)data != NULL); |
| |
| for (i = 0; i < 8; i++) |
| local.A[i] = ctx->state[i]; |
| |
| # if defined(MBEDTLS_SHA256_SMALLER) |
| for (i = 0; i < 64; i++) { |
| if (i < 16) |
| GET_UINT32_BE(local.W[i], data, 4 * i); |
| else |
| R(i); |
| |
| P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4], |
| local.A[5], local.A[6], local.A[7], local.W[i], K[i]); |
| |
| local.temp1 = local.A[7]; |
| local.A[7] = local.A[6]; |
| local.A[6] = local.A[5]; |
| local.A[5] = local.A[4]; |
| local.A[4] = local.A[3]; |
| local.A[3] = local.A[2]; |
| local.A[2] = local.A[1]; |
| local.A[1] = local.A[0]; |
| local.A[0] = local.temp1; |
| } |
| # else /* MBEDTLS_SHA256_SMALLER */ |
| for (i = 0; i < 16; i++) |
| GET_UINT32_BE(local.W[i], data, 4 * i); |
| |
| for (i = 0; i < 16; i += 8) { |
| P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4], |
| local.A[5], local.A[6], local.A[7], local.W[i + 0], K[i + 0]); |
| P(local.A[7], local.A[0], local.A[1], local.A[2], local.A[3], |
| local.A[4], local.A[5], local.A[6], local.W[i + 1], K[i + 1]); |
| P(local.A[6], local.A[7], local.A[0], local.A[1], local.A[2], |
| local.A[3], local.A[4], local.A[5], local.W[i + 2], K[i + 2]); |
| P(local.A[5], local.A[6], local.A[7], local.A[0], local.A[1], |
| local.A[2], local.A[3], local.A[4], local.W[i + 3], K[i + 3]); |
| P(local.A[4], local.A[5], local.A[6], local.A[7], local.A[0], |
| local.A[1], local.A[2], local.A[3], local.W[i + 4], K[i + 4]); |
| P(local.A[3], local.A[4], local.A[5], local.A[6], local.A[7], |
| local.A[0], local.A[1], local.A[2], local.W[i + 5], K[i + 5]); |
| P(local.A[2], local.A[3], local.A[4], local.A[5], local.A[6], |
| local.A[7], local.A[0], local.A[1], local.W[i + 6], K[i + 6]); |
| P(local.A[1], local.A[2], local.A[3], local.A[4], local.A[5], |
| local.A[6], local.A[7], local.A[0], local.W[i + 7], K[i + 7]); |
| } |
| |
| for (i = 16; i < 64; i += 8) { |
| P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4], |
| local.A[5], local.A[6], local.A[7], R(i + 0), K[i + 0]); |
| P(local.A[7], local.A[0], local.A[1], local.A[2], local.A[3], |
| local.A[4], local.A[5], local.A[6], R(i + 1), K[i + 1]); |
| P(local.A[6], local.A[7], local.A[0], local.A[1], local.A[2], |
| local.A[3], local.A[4], local.A[5], R(i + 2), K[i + 2]); |
| P(local.A[5], local.A[6], local.A[7], local.A[0], local.A[1], |
| local.A[2], local.A[3], local.A[4], R(i + 3), K[i + 3]); |
| P(local.A[4], local.A[5], local.A[6], local.A[7], local.A[0], |
| local.A[1], local.A[2], local.A[3], R(i + 4), K[i + 4]); |
| P(local.A[3], local.A[4], local.A[5], local.A[6], local.A[7], |
| local.A[0], local.A[1], local.A[2], R(i + 5), K[i + 5]); |
| P(local.A[2], local.A[3], local.A[4], local.A[5], local.A[6], |
| local.A[7], local.A[0], local.A[1], R(i + 6), K[i + 6]); |
| P(local.A[1], local.A[2], local.A[3], local.A[4], local.A[5], |
| local.A[6], local.A[7], local.A[0], R(i + 7), K[i + 7]); |
| } |
| # endif /* MBEDTLS_SHA256_SMALLER */ |
| |
| for (i = 0; i < 8; i++) |
| ctx->state[i] += local.A[i]; |
| |
| /* Zeroise buffers and variables to clear sensitive data from memory. */ |
| mbedtls_platform_zeroize(&local, sizeof(local)); |
| |
| return 0; |
| } |
| |
| # endif /* !MBEDTLS_SHA256_PROCESS_ALT */ |
| |
| /* |
| * SHA-256 process buffer |
| */ |
| int mbedtls_sha256_update(mbedtls_sha256_context *ctx, |
| const unsigned char *input, |
| size_t ilen) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| size_t fill; |
| uint32_t left; |
| |
| SHA256_VALIDATE_RET(ctx != NULL); |
| SHA256_VALIDATE_RET(ilen == 0 || input != NULL); |
| |
| if (ilen == 0) |
| return 0; |
| |
| left = ctx->total[0] & 0x3F; |
| fill = 64 - left; |
| |
| ctx->total[0] += (uint32_t)ilen; |
| ctx->total[0] &= 0xFFFFFFFF; |
| |
| if (ctx->total[0] < (uint32_t)ilen) |
| ctx->total[1]++; |
| |
| if (left && ilen >= fill) { |
| memcpy((void *)(ctx->buffer + left), input, fill); |
| |
| if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0) |
| return ret; |
| |
| input += fill; |
| ilen -= fill; |
| left = 0; |
| } |
| |
| while (ilen >= 64) { |
| if ((ret = mbedtls_internal_sha256_process(ctx, input)) != 0) |
| return ret; |
| |
| input += 64; |
| ilen -= 64; |
| } |
| |
| if (ilen > 0) |
| memcpy((void *)(ctx->buffer + left), input, ilen); |
| |
| return 0; |
| } |
| |
| /* |
| * SHA-256 final digest |
| */ |
| int mbedtls_sha256_finish(mbedtls_sha256_context *ctx, unsigned char *output) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| uint32_t used; |
| uint32_t high, low; |
| |
| SHA256_VALIDATE_RET(ctx != NULL); |
| SHA256_VALIDATE_RET((unsigned char *)output != NULL); |
| |
| /* |
| * Add padding: 0x80 then 0x00 until 8 bytes remain for the length |
| */ |
| used = ctx->total[0] & 0x3F; |
| |
| ctx->buffer[used++] = 0x80; |
| |
| if (used <= 56) { |
| /* Enough room for padding + length in current block */ |
| memset(ctx->buffer + used, 0, 56 - used); |
| } else { |
| /* We'll need an extra block */ |
| memset(ctx->buffer + used, 0, 64 - used); |
| |
| if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0) |
| return ret; |
| |
| memset(ctx->buffer, 0, 56); |
| } |
| |
| /* |
| * Add message length |
| */ |
| high = (ctx->total[0] >> 29) | (ctx->total[1] << 3); |
| low = (ctx->total[0] << 3); |
| |
| PUT_UINT32_BE(high, ctx->buffer, 56); |
| PUT_UINT32_BE(low, ctx->buffer, 60); |
| |
| if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0) |
| return ret; |
| |
| /* |
| * Output final state |
| */ |
| PUT_UINT32_BE(ctx->state[0], output, 0); |
| PUT_UINT32_BE(ctx->state[1], output, 4); |
| PUT_UINT32_BE(ctx->state[2], output, 8); |
| PUT_UINT32_BE(ctx->state[3], output, 12); |
| PUT_UINT32_BE(ctx->state[4], output, 16); |
| PUT_UINT32_BE(ctx->state[5], output, 20); |
| PUT_UINT32_BE(ctx->state[6], output, 24); |
| |
| # if defined(MBEDTLS_SHA224_C) |
| if (ctx->is224 == 0) |
| # endif |
| PUT_UINT32_BE(ctx->state[7], output, 28); |
| |
| return 0; |
| } |
| |
| # endif /* !MBEDTLS_SHA256_ALT */ |
| |
| /* |
| * output = SHA-256( input buffer ) |
| */ |
| int mbedtls_sha256(const unsigned char *input, |
| size_t ilen, |
| unsigned char *output, |
| int is224) |
| { |
| int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; |
| mbedtls_sha256_context ctx; |
| |
| # if defined(MBEDTLS_SHA224_C) |
| SHA256_VALIDATE_RET(is224 == 0 || is224 == 1); |
| # else |
| SHA256_VALIDATE_RET(is224 == 0); |
| # endif |
| |
| SHA256_VALIDATE_RET(ilen == 0 || input != NULL); |
| SHA256_VALIDATE_RET((unsigned char *)output != NULL); |
| |
| mbedtls_sha256_init(&ctx); |
| |
| if ((ret = mbedtls_sha256_starts(&ctx, is224)) != 0) |
| goto exit; |
| |
| if ((ret = mbedtls_sha256_update(&ctx, input, ilen)) != 0) |
| goto exit; |
| |
| if ((ret = mbedtls_sha256_finish(&ctx, output)) != 0) |
| goto exit; |
| |
| exit: |
| mbedtls_sha256_free(&ctx); |
| |
| return ret; |
| } |
| |
| # if defined(MBEDTLS_SELF_TEST) |
| /* |
| * FIPS-180-2 test vectors |
| */ |
| static const unsigned char sha256_test_buf[3][57] = { |
| { "abc" }, |
| { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" }, |
| { "" } |
| }; |
| |
| static const size_t sha256_test_buflen[3] = { 3, 56, 1000 }; |
| |
| static const unsigned char sha256_test_sum[6][32] = { |
| /* |
| * SHA-224 test vectors |
| */ |
| { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22, 0x86, 0x42, |
| 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3, 0x2A, 0xAD, 0xBC, 0xE4, |
| 0xBD, 0xA0, 0xB3, 0xF7, 0xE3, 0x6C, 0x9D, 0xA7 }, |
| { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC, 0x5D, 0xBA, |
| 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50, 0xB0, 0xC6, 0x45, 0x5C, |
| 0xB4, 0xF5, 0x8B, 0x19, 0x52, 0x52, 0x25, 0x25 }, |
| { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8, 0xBB, 0xB4, |
| 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B, 0xF0, 0x3F, 0x42, 0x58, |
| 0x19, 0x48, 0xB2, 0xEE, 0x4E, 0xE7, 0xAD, 0x67 }, |
| |
| /* |
| * SHA-256 test vectors |
| */ |
| { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA, 0x41, 0x41, 0x40, |
| 0xDE, 0x5D, 0xAE, 0x22, 0x23, 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, |
| 0x7A, 0x9C, 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD }, |
| { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8, 0xE5, 0xC0, 0x26, |
| 0x93, 0x0C, 0x3E, 0x60, 0x39, 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, |
| 0x21, 0x67, 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 }, |
| { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92, 0x81, 0xA1, 0xC7, |
| 0xE2, 0x84, 0xD7, 0x3E, 0x67, 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, |
| 0x20, 0x0E, 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 } |
| }; |
| |
| /* |
| * Checkup routine |
| */ |
| int mbedtls_sha256_self_test(int verbose) |
| { |
| int i, j, k, buflen, ret = 0; |
| unsigned char *buf; |
| unsigned char sha256sum[32]; |
| mbedtls_sha256_context ctx; |
| |
| buf = mbedtls_calloc(1024, sizeof(unsigned char)); |
| if (NULL == buf) { |
| if (verbose != 0) |
| mbedtls_printf("Buffer allocation failed\n"); |
| |
| return 1; |
| } |
| |
| mbedtls_sha256_init(&ctx); |
| |
| for (i = 0; i < 6; i++) { |
| j = i % 3; |
| k = i < 3; |
| |
| if (verbose != 0) |
| mbedtls_printf(" SHA-%d test #%d: ", 256 - k * 32, j + 1); |
| |
| if ((ret = mbedtls_sha256_starts(&ctx, k)) != 0) |
| goto fail; |
| |
| if (j == 2) { |
| memset(buf, 'a', buflen = 1000); |
| |
| for (j = 0; j < 1000; j++) { |
| ret = mbedtls_sha256_update(&ctx, buf, buflen); |
| if (ret != 0) |
| goto fail; |
| } |
| |
| } else { |
| ret = mbedtls_sha256_update(&ctx, sha256_test_buf[j], |
| sha256_test_buflen[j]); |
| if (ret != 0) |
| goto fail; |
| } |
| |
| if ((ret = mbedtls_sha256_finish(&ctx, sha256sum)) != 0) |
| goto fail; |
| |
| if (memcmp(sha256sum, sha256_test_sum[i], 32 - k * 4) != 0) { |
| ret = 1; |
| goto fail; |
| } |
| |
| if (verbose != 0) |
| mbedtls_printf("passed\n"); |
| } |
| |
| if (verbose != 0) |
| mbedtls_printf("\n"); |
| |
| goto exit; |
| |
| fail: |
| if (verbose != 0) |
| mbedtls_printf("failed\n"); |
| |
| exit: |
| mbedtls_sha256_free(&ctx); |
| mbedtls_free(buf); |
| |
| return ret; |
| } |
| |
| # endif /* MBEDTLS_SELF_TEST */ |
| |
| #endif /* MBEDTLS_SHA256_C */ |