490 lines
14 KiB
C
490 lines
14 KiB
C
/*
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* FIPS-180-1 compliant SHA-1 implementation
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* The SHA-1 standard was published by NIST in 1993.
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*
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* http://www.itl.nist.gov/fipspubs/fip180-1.htm
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*/
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#include "common.h"
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#if defined(MBEDTLS_SHA1_C)
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#include "mbedtls/sha1.h"
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#include "mbedtls/platform_util.h"
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#include "mbedtls/error.h"
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#include <string.h>
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#include "mbedtls/platform.h"
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#if !defined(MBEDTLS_SHA1_ALT)
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void mbedtls_sha1_init(mbedtls_sha1_context *ctx)
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{
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memset(ctx, 0, sizeof(mbedtls_sha1_context));
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}
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void mbedtls_sha1_free(mbedtls_sha1_context *ctx)
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{
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if (ctx == NULL) {
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return;
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}
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mbedtls_platform_zeroize(ctx, sizeof(mbedtls_sha1_context));
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}
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void mbedtls_sha1_clone(mbedtls_sha1_context *dst,
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const mbedtls_sha1_context *src)
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{
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*dst = *src;
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}
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/*
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* SHA-1 context setup
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*/
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int mbedtls_sha1_starts(mbedtls_sha1_context *ctx)
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{
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ctx->total[0] = 0;
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ctx->total[1] = 0;
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ctx->state[0] = 0x67452301;
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ctx->state[1] = 0xEFCDAB89;
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ctx->state[2] = 0x98BADCFE;
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ctx->state[3] = 0x10325476;
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ctx->state[4] = 0xC3D2E1F0;
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return 0;
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}
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#if !defined(MBEDTLS_SHA1_PROCESS_ALT)
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int mbedtls_internal_sha1_process(mbedtls_sha1_context *ctx,
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const unsigned char data[64])
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{
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struct {
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uint32_t temp, W[16], A, B, C, D, E;
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} local;
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local.W[0] = MBEDTLS_GET_UINT32_BE(data, 0);
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local.W[1] = MBEDTLS_GET_UINT32_BE(data, 4);
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local.W[2] = MBEDTLS_GET_UINT32_BE(data, 8);
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local.W[3] = MBEDTLS_GET_UINT32_BE(data, 12);
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local.W[4] = MBEDTLS_GET_UINT32_BE(data, 16);
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local.W[5] = MBEDTLS_GET_UINT32_BE(data, 20);
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local.W[6] = MBEDTLS_GET_UINT32_BE(data, 24);
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local.W[7] = MBEDTLS_GET_UINT32_BE(data, 28);
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local.W[8] = MBEDTLS_GET_UINT32_BE(data, 32);
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local.W[9] = MBEDTLS_GET_UINT32_BE(data, 36);
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local.W[10] = MBEDTLS_GET_UINT32_BE(data, 40);
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local.W[11] = MBEDTLS_GET_UINT32_BE(data, 44);
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local.W[12] = MBEDTLS_GET_UINT32_BE(data, 48);
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local.W[13] = MBEDTLS_GET_UINT32_BE(data, 52);
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local.W[14] = MBEDTLS_GET_UINT32_BE(data, 56);
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local.W[15] = MBEDTLS_GET_UINT32_BE(data, 60);
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#define S(x, n) (((x) << (n)) | (((x) & 0xFFFFFFFF) >> (32 - (n))))
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#define R(t) \
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( \
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local.temp = local.W[((t) - 3) & 0x0F] ^ \
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local.W[((t) - 8) & 0x0F] ^ \
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local.W[((t) - 14) & 0x0F] ^ \
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local.W[(t) & 0x0F], \
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(local.W[(t) & 0x0F] = S(local.temp, 1)) \
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)
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#define P(a, b, c, d, e, x) \
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do \
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{ \
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(e) += S((a), 5) + F((b), (c), (d)) + K + (x); \
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(b) = S((b), 30); \
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} while (0)
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local.A = ctx->state[0];
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local.B = ctx->state[1];
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local.C = ctx->state[2];
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local.D = ctx->state[3];
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local.E = ctx->state[4];
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#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
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#define K 0x5A827999
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P(local.A, local.B, local.C, local.D, local.E, local.W[0]);
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P(local.E, local.A, local.B, local.C, local.D, local.W[1]);
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P(local.D, local.E, local.A, local.B, local.C, local.W[2]);
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P(local.C, local.D, local.E, local.A, local.B, local.W[3]);
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P(local.B, local.C, local.D, local.E, local.A, local.W[4]);
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P(local.A, local.B, local.C, local.D, local.E, local.W[5]);
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P(local.E, local.A, local.B, local.C, local.D, local.W[6]);
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P(local.D, local.E, local.A, local.B, local.C, local.W[7]);
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P(local.C, local.D, local.E, local.A, local.B, local.W[8]);
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P(local.B, local.C, local.D, local.E, local.A, local.W[9]);
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P(local.A, local.B, local.C, local.D, local.E, local.W[10]);
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P(local.E, local.A, local.B, local.C, local.D, local.W[11]);
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P(local.D, local.E, local.A, local.B, local.C, local.W[12]);
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P(local.C, local.D, local.E, local.A, local.B, local.W[13]);
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P(local.B, local.C, local.D, local.E, local.A, local.W[14]);
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P(local.A, local.B, local.C, local.D, local.E, local.W[15]);
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P(local.E, local.A, local.B, local.C, local.D, R(16));
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P(local.D, local.E, local.A, local.B, local.C, R(17));
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P(local.C, local.D, local.E, local.A, local.B, R(18));
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P(local.B, local.C, local.D, local.E, local.A, R(19));
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#undef K
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#undef F
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#define F(x, y, z) ((x) ^ (y) ^ (z))
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#define K 0x6ED9EBA1
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P(local.A, local.B, local.C, local.D, local.E, R(20));
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P(local.E, local.A, local.B, local.C, local.D, R(21));
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P(local.D, local.E, local.A, local.B, local.C, R(22));
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P(local.C, local.D, local.E, local.A, local.B, R(23));
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P(local.B, local.C, local.D, local.E, local.A, R(24));
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P(local.A, local.B, local.C, local.D, local.E, R(25));
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P(local.E, local.A, local.B, local.C, local.D, R(26));
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P(local.D, local.E, local.A, local.B, local.C, R(27));
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P(local.C, local.D, local.E, local.A, local.B, R(28));
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P(local.B, local.C, local.D, local.E, local.A, R(29));
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P(local.A, local.B, local.C, local.D, local.E, R(30));
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P(local.E, local.A, local.B, local.C, local.D, R(31));
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P(local.D, local.E, local.A, local.B, local.C, R(32));
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P(local.C, local.D, local.E, local.A, local.B, R(33));
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P(local.B, local.C, local.D, local.E, local.A, R(34));
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P(local.A, local.B, local.C, local.D, local.E, R(35));
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P(local.E, local.A, local.B, local.C, local.D, R(36));
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P(local.D, local.E, local.A, local.B, local.C, R(37));
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P(local.C, local.D, local.E, local.A, local.B, R(38));
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P(local.B, local.C, local.D, local.E, local.A, R(39));
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#undef K
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#undef F
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#define F(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
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#define K 0x8F1BBCDC
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P(local.A, local.B, local.C, local.D, local.E, R(40));
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P(local.E, local.A, local.B, local.C, local.D, R(41));
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P(local.D, local.E, local.A, local.B, local.C, R(42));
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P(local.C, local.D, local.E, local.A, local.B, R(43));
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P(local.B, local.C, local.D, local.E, local.A, R(44));
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P(local.A, local.B, local.C, local.D, local.E, R(45));
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P(local.E, local.A, local.B, local.C, local.D, R(46));
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P(local.D, local.E, local.A, local.B, local.C, R(47));
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P(local.C, local.D, local.E, local.A, local.B, R(48));
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P(local.B, local.C, local.D, local.E, local.A, R(49));
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P(local.A, local.B, local.C, local.D, local.E, R(50));
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P(local.E, local.A, local.B, local.C, local.D, R(51));
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P(local.D, local.E, local.A, local.B, local.C, R(52));
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P(local.C, local.D, local.E, local.A, local.B, R(53));
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P(local.B, local.C, local.D, local.E, local.A, R(54));
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P(local.A, local.B, local.C, local.D, local.E, R(55));
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P(local.E, local.A, local.B, local.C, local.D, R(56));
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P(local.D, local.E, local.A, local.B, local.C, R(57));
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P(local.C, local.D, local.E, local.A, local.B, R(58));
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P(local.B, local.C, local.D, local.E, local.A, R(59));
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#undef K
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#undef F
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#define F(x, y, z) ((x) ^ (y) ^ (z))
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#define K 0xCA62C1D6
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P(local.A, local.B, local.C, local.D, local.E, R(60));
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P(local.E, local.A, local.B, local.C, local.D, R(61));
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P(local.D, local.E, local.A, local.B, local.C, R(62));
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P(local.C, local.D, local.E, local.A, local.B, R(63));
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P(local.B, local.C, local.D, local.E, local.A, R(64));
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P(local.A, local.B, local.C, local.D, local.E, R(65));
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P(local.E, local.A, local.B, local.C, local.D, R(66));
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P(local.D, local.E, local.A, local.B, local.C, R(67));
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P(local.C, local.D, local.E, local.A, local.B, R(68));
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P(local.B, local.C, local.D, local.E, local.A, R(69));
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P(local.A, local.B, local.C, local.D, local.E, R(70));
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P(local.E, local.A, local.B, local.C, local.D, R(71));
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P(local.D, local.E, local.A, local.B, local.C, R(72));
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P(local.C, local.D, local.E, local.A, local.B, R(73));
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P(local.B, local.C, local.D, local.E, local.A, R(74));
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P(local.A, local.B, local.C, local.D, local.E, R(75));
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P(local.E, local.A, local.B, local.C, local.D, R(76));
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P(local.D, local.E, local.A, local.B, local.C, R(77));
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P(local.C, local.D, local.E, local.A, local.B, R(78));
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P(local.B, local.C, local.D, local.E, local.A, R(79));
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#undef K
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#undef F
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ctx->state[0] += local.A;
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ctx->state[1] += local.B;
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ctx->state[2] += local.C;
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ctx->state[3] += local.D;
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ctx->state[4] += local.E;
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/* Zeroise buffers and variables to clear sensitive data from memory. */
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mbedtls_platform_zeroize(&local, sizeof(local));
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return 0;
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}
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#endif /* !MBEDTLS_SHA1_PROCESS_ALT */
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/*
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* SHA-1 process buffer
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*/
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int mbedtls_sha1_update(mbedtls_sha1_context *ctx,
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const unsigned char *input,
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size_t ilen)
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t fill;
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uint32_t left;
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if (ilen == 0) {
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return 0;
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}
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left = ctx->total[0] & 0x3F;
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fill = 64 - left;
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ctx->total[0] += (uint32_t) ilen;
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ctx->total[0] &= 0xFFFFFFFF;
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if (ctx->total[0] < (uint32_t) ilen) {
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ctx->total[1]++;
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}
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if (left && ilen >= fill) {
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memcpy((void *) (ctx->buffer + left), input, fill);
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if ((ret = mbedtls_internal_sha1_process(ctx, ctx->buffer)) != 0) {
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return ret;
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}
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input += fill;
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ilen -= fill;
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left = 0;
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}
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while (ilen >= 64) {
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if ((ret = mbedtls_internal_sha1_process(ctx, input)) != 0) {
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return ret;
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}
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input += 64;
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ilen -= 64;
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}
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if (ilen > 0) {
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memcpy((void *) (ctx->buffer + left), input, ilen);
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}
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return 0;
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}
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/*
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* SHA-1 final digest
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*/
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int mbedtls_sha1_finish(mbedtls_sha1_context *ctx,
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unsigned char output[20])
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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uint32_t used;
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uint32_t high, low;
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/*
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* Add padding: 0x80 then 0x00 until 8 bytes remain for the length
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*/
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used = ctx->total[0] & 0x3F;
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ctx->buffer[used++] = 0x80;
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if (used <= 56) {
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/* Enough room for padding + length in current block */
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memset(ctx->buffer + used, 0, 56 - used);
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} else {
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/* We'll need an extra block */
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memset(ctx->buffer + used, 0, 64 - used);
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if ((ret = mbedtls_internal_sha1_process(ctx, ctx->buffer)) != 0) {
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return ret;
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}
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memset(ctx->buffer, 0, 56);
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}
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/*
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* Add message length
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*/
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high = (ctx->total[0] >> 29)
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| (ctx->total[1] << 3);
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low = (ctx->total[0] << 3);
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MBEDTLS_PUT_UINT32_BE(high, ctx->buffer, 56);
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MBEDTLS_PUT_UINT32_BE(low, ctx->buffer, 60);
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if ((ret = mbedtls_internal_sha1_process(ctx, ctx->buffer)) != 0) {
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return ret;
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}
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/*
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* Output final state
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*/
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MBEDTLS_PUT_UINT32_BE(ctx->state[0], output, 0);
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MBEDTLS_PUT_UINT32_BE(ctx->state[1], output, 4);
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MBEDTLS_PUT_UINT32_BE(ctx->state[2], output, 8);
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MBEDTLS_PUT_UINT32_BE(ctx->state[3], output, 12);
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MBEDTLS_PUT_UINT32_BE(ctx->state[4], output, 16);
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return 0;
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}
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#endif /* !MBEDTLS_SHA1_ALT */
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/*
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* output = SHA-1( input buffer )
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*/
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int mbedtls_sha1(const unsigned char *input,
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size_t ilen,
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unsigned char output[20])
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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mbedtls_sha1_context ctx;
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mbedtls_sha1_init(&ctx);
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if ((ret = mbedtls_sha1_starts(&ctx)) != 0) {
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goto exit;
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}
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if ((ret = mbedtls_sha1_update(&ctx, input, ilen)) != 0) {
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goto exit;
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}
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if ((ret = mbedtls_sha1_finish(&ctx, output)) != 0) {
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goto exit;
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}
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exit:
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mbedtls_sha1_free(&ctx);
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return ret;
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}
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#if defined(MBEDTLS_SELF_TEST)
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/*
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* FIPS-180-1 test vectors
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*/
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static const unsigned char sha1_test_buf[3][57] =
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{
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{ "abc" },
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{ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
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{ "" }
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};
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static const size_t sha1_test_buflen[3] =
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{
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3, 56, 1000
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};
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static const unsigned char sha1_test_sum[3][20] =
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{
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{ 0xA9, 0x99, 0x3E, 0x36, 0x47, 0x06, 0x81, 0x6A, 0xBA, 0x3E,
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0x25, 0x71, 0x78, 0x50, 0xC2, 0x6C, 0x9C, 0xD0, 0xD8, 0x9D },
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{ 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E, 0xBA, 0xAE,
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0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5, 0xE5, 0x46, 0x70, 0xF1 },
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{ 0x34, 0xAA, 0x97, 0x3C, 0xD4, 0xC4, 0xDA, 0xA4, 0xF6, 0x1E,
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0xEB, 0x2B, 0xDB, 0xAD, 0x27, 0x31, 0x65, 0x34, 0x01, 0x6F }
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};
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/*
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* Checkup routine
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*/
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int mbedtls_sha1_self_test(int verbose)
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{
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int i, j, buflen, ret = 0;
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unsigned char buf[1024];
|
|
unsigned char sha1sum[20];
|
|
mbedtls_sha1_context ctx;
|
|
|
|
mbedtls_sha1_init(&ctx);
|
|
|
|
/*
|
|
* SHA-1
|
|
*/
|
|
for (i = 0; i < 3; i++) {
|
|
if (verbose != 0) {
|
|
mbedtls_printf(" SHA-1 test #%d: ", i + 1);
|
|
}
|
|
|
|
if ((ret = mbedtls_sha1_starts(&ctx)) != 0) {
|
|
goto fail;
|
|
}
|
|
|
|
if (i == 2) {
|
|
memset(buf, 'a', buflen = 1000);
|
|
|
|
for (j = 0; j < 1000; j++) {
|
|
ret = mbedtls_sha1_update(&ctx, buf, buflen);
|
|
if (ret != 0) {
|
|
goto fail;
|
|
}
|
|
}
|
|
} else {
|
|
ret = mbedtls_sha1_update(&ctx, sha1_test_buf[i],
|
|
sha1_test_buflen[i]);
|
|
if (ret != 0) {
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if ((ret = mbedtls_sha1_finish(&ctx, sha1sum)) != 0) {
|
|
goto fail;
|
|
}
|
|
|
|
if (memcmp(sha1sum, sha1_test_sum[i], 20) != 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_sha1_free(&ctx);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#endif /* MBEDTLS_SELF_TEST */
|
|
|
|
#endif /* MBEDTLS_SHA1_C */
|