/* * FIPS-180-1 compliant SHA-1 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-1 standard was published by NIST in 1993. * * http://www.itl.nist.gov/fipspubs/fip180-1.htm */ #include "common.h" #if defined(MBEDTLS_SHA1_C) #include "mbedtls/sha1.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> #define mbedtls_printf printf #endif /* MBEDTLS_PLATFORM_C */ #endif /* MBEDTLS_SELF_TEST */ #define SHA1_VALIDATE_RET(cond) \ MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_SHA1_BAD_INPUT_DATA ) #define SHA1_VALIDATE(cond) MBEDTLS_INTERNAL_VALIDATE( cond ) #if !defined(MBEDTLS_SHA1_ALT) void mbedtls_sha1_init( mbedtls_sha1_context *ctx ) { SHA1_VALIDATE( ctx != NULL ); memset( ctx, 0, sizeof( mbedtls_sha1_context ) ); } void mbedtls_sha1_free( mbedtls_sha1_context *ctx ) { if( ctx == NULL ) return; mbedtls_platform_zeroize( ctx, sizeof( mbedtls_sha1_context ) ); } void mbedtls_sha1_clone( mbedtls_sha1_context *dst, const mbedtls_sha1_context *src ) { SHA1_VALIDATE( dst != NULL ); SHA1_VALIDATE( src != NULL ); *dst = *src; } /* * SHA-1 context setup */ int mbedtls_sha1_starts_ret( mbedtls_sha1_context *ctx ) { SHA1_VALIDATE_RET( ctx != NULL ); ctx->total[0] = 0; ctx->total[1] = 0; ctx->state[0] = 0x67452301; ctx->state[1] = 0xEFCDAB89; ctx->state[2] = 0x98BADCFE; ctx->state[3] = 0x10325476; ctx->state[4] = 0xC3D2E1F0; return( 0 ); } #if !defined(MBEDTLS_DEPRECATED_REMOVED) void mbedtls_sha1_starts( mbedtls_sha1_context *ctx ) { mbedtls_sha1_starts_ret( ctx ); } #endif #if !defined(MBEDTLS_SHA1_PROCESS_ALT) int mbedtls_internal_sha1_process( mbedtls_sha1_context *ctx, const unsigned char data[64] ) { struct { uint32_t temp, W[16], A, B, C, D, E; } local; SHA1_VALIDATE_RET( ctx != NULL ); SHA1_VALIDATE_RET( (const unsigned char *)data != NULL ); local.W[ 0] = MBEDTLS_GET_UINT32_BE( data, 0 ); local.W[ 1] = MBEDTLS_GET_UINT32_BE( data, 4 ); local.W[ 2] = MBEDTLS_GET_UINT32_BE( data, 8 ); local.W[ 3] = MBEDTLS_GET_UINT32_BE( data, 12 ); local.W[ 4] = MBEDTLS_GET_UINT32_BE( data, 16 ); local.W[ 5] = MBEDTLS_GET_UINT32_BE( data, 20 ); local.W[ 6] = MBEDTLS_GET_UINT32_BE( data, 24 ); local.W[ 7] = MBEDTLS_GET_UINT32_BE( data, 28 ); local.W[ 8] = MBEDTLS_GET_UINT32_BE( data, 32 ); local.W[ 9] = MBEDTLS_GET_UINT32_BE( data, 36 ); local.W[10] = MBEDTLS_GET_UINT32_BE( data, 40 ); local.W[11] = MBEDTLS_GET_UINT32_BE( data, 44 ); local.W[12] = MBEDTLS_GET_UINT32_BE( data, 48 ); local.W[13] = MBEDTLS_GET_UINT32_BE( data, 52 ); local.W[14] = MBEDTLS_GET_UINT32_BE( data, 56 ); local.W[15] = MBEDTLS_GET_UINT32_BE( data, 60 ); #define S(x,n) (((x) << (n)) | (((x) & 0xFFFFFFFF) >> (32 - (n)))) #define R(t) \ ( \ local.temp = local.W[( (t) - 3 ) & 0x0F] ^ \ local.W[( (t) - 8 ) & 0x0F] ^ \ local.W[( (t) - 14 ) & 0x0F] ^ \ local.W[ (t) & 0x0F], \ ( local.W[(t) & 0x0F] = S(local.temp,1) ) \ ) #define P(a,b,c,d,e,x) \ do \ { \ (e) += S((a),5) + F((b),(c),(d)) + K + (x); \ (b) = S((b),30); \ } while( 0 ) local.A = ctx->state[0]; local.B = ctx->state[1]; local.C = ctx->state[2]; local.D = ctx->state[3]; local.E = ctx->state[4]; #define F(x,y,z) ((z) ^ ((x) & ((y) ^ (z)))) #define K 0x5A827999 P( local.A, local.B, local.C, local.D, local.E, local.W[0] ); P( local.E, local.A, local.B, local.C, local.D, local.W[1] ); P( local.D, local.E, local.A, local.B, local.C, local.W[2] ); P( local.C, local.D, local.E, local.A, local.B, local.W[3] ); P( local.B, local.C, local.D, local.E, local.A, local.W[4] ); P( local.A, local.B, local.C, local.D, local.E, local.W[5] ); P( local.E, local.A, local.B, local.C, local.D, local.W[6] ); P( local.D, local.E, local.A, local.B, local.C, local.W[7] ); P( local.C, local.D, local.E, local.A, local.B, local.W[8] ); P( local.B, local.C, local.D, local.E, local.A, local.W[9] ); P( local.A, local.B, local.C, local.D, local.E, local.W[10] ); P( local.E, local.A, local.B, local.C, local.D, local.W[11] ); P( local.D, local.E, local.A, local.B, local.C, local.W[12] ); P( local.C, local.D, local.E, local.A, local.B, local.W[13] ); P( local.B, local.C, local.D, local.E, local.A, local.W[14] ); P( local.A, local.B, local.C, local.D, local.E, local.W[15] ); P( local.E, local.A, local.B, local.C, local.D, R(16) ); P( local.D, local.E, local.A, local.B, local.C, R(17) ); P( local.C, local.D, local.E, local.A, local.B, R(18) ); P( local.B, local.C, local.D, local.E, local.A, R(19) ); #undef K #undef F #define F(x,y,z) ((x) ^ (y) ^ (z)) #define K 0x6ED9EBA1 P( local.A, local.B, local.C, local.D, local.E, R(20) ); P( local.E, local.A, local.B, local.C, local.D, R(21) ); P( local.D, local.E, local.A, local.B, local.C, R(22) ); P( local.C, local.D, local.E, local.A, local.B, R(23) ); P( local.B, local.C, local.D, local.E, local.A, R(24) ); P( local.A, local.B, local.C, local.D, local.E, R(25) ); P( local.E, local.A, local.B, local.C, local.D, R(26) ); P( local.D, local.E, local.A, local.B, local.C, R(27) ); P( local.C, local.D, local.E, local.A, local.B, R(28) ); P( local.B, local.C, local.D, local.E, local.A, R(29) ); P( local.A, local.B, local.C, local.D, local.E, R(30) ); P( local.E, local.A, local.B, local.C, local.D, R(31) ); P( local.D, local.E, local.A, local.B, local.C, R(32) ); P( local.C, local.D, local.E, local.A, local.B, R(33) ); P( local.B, local.C, local.D, local.E, local.A, R(34) ); P( local.A, local.B, local.C, local.D, local.E, R(35) ); P( local.E, local.A, local.B, local.C, local.D, R(36) ); P( local.D, local.E, local.A, local.B, local.C, R(37) ); P( local.C, local.D, local.E, local.A, local.B, R(38) ); P( local.B, local.C, local.D, local.E, local.A, R(39) ); #undef K #undef F #define F(x,y,z) (((x) & (y)) | ((z) & ((x) | (y)))) #define K 0x8F1BBCDC P( local.A, local.B, local.C, local.D, local.E, R(40) ); P( local.E, local.A, local.B, local.C, local.D, R(41) ); P( local.D, local.E, local.A, local.B, local.C, R(42) ); P( local.C, local.D, local.E, local.A, local.B, R(43) ); P( local.B, local.C, local.D, local.E, local.A, R(44) ); P( local.A, local.B, local.C, local.D, local.E, R(45) ); P( local.E, local.A, local.B, local.C, local.D, R(46) ); P( local.D, local.E, local.A, local.B, local.C, R(47) ); P( local.C, local.D, local.E, local.A, local.B, R(48) ); P( local.B, local.C, local.D, local.E, local.A, R(49) ); P( local.A, local.B, local.C, local.D, local.E, R(50) ); P( local.E, local.A, local.B, local.C, local.D, R(51) ); P( local.D, local.E, local.A, local.B, local.C, R(52) ); P( local.C, local.D, local.E, local.A, local.B, R(53) ); P( local.B, local.C, local.D, local.E, local.A, R(54) ); P( local.A, local.B, local.C, local.D, local.E, R(55) ); P( local.E, local.A, local.B, local.C, local.D, R(56) ); P( local.D, local.E, local.A, local.B, local.C, R(57) ); P( local.C, local.D, local.E, local.A, local.B, R(58) ); P( local.B, local.C, local.D, local.E, local.A, R(59) ); #undef K #undef F #define F(x,y,z) ((x) ^ (y) ^ (z)) #define K 0xCA62C1D6 P( local.A, local.B, local.C, local.D, local.E, R(60) ); P( local.E, local.A, local.B, local.C, local.D, R(61) ); P( local.D, local.E, local.A, local.B, local.C, R(62) ); P( local.C, local.D, local.E, local.A, local.B, R(63) ); P( local.B, local.C, local.D, local.E, local.A, R(64) ); P( local.A, local.B, local.C, local.D, local.E, R(65) ); P( local.E, local.A, local.B, local.C, local.D, R(66) ); P( local.D, local.E, local.A, local.B, local.C, R(67) ); P( local.C, local.D, local.E, local.A, local.B, R(68) ); P( local.B, local.C, local.D, local.E, local.A, R(69) ); P( local.A, local.B, local.C, local.D, local.E, R(70) ); P( local.E, local.A, local.B, local.C, local.D, R(71) ); P( local.D, local.E, local.A, local.B, local.C, R(72) ); P( local.C, local.D, local.E, local.A, local.B, R(73) ); P( local.B, local.C, local.D, local.E, local.A, R(74) ); P( local.A, local.B, local.C, local.D, local.E, R(75) ); P( local.E, local.A, local.B, local.C, local.D, R(76) ); P( local.D, local.E, local.A, local.B, local.C, R(77) ); P( local.C, local.D, local.E, local.A, local.B, R(78) ); P( local.B, local.C, local.D, local.E, local.A, R(79) ); #undef K #undef F ctx->state[0] += local.A; ctx->state[1] += local.B; ctx->state[2] += local.C; ctx->state[3] += local.D; ctx->state[4] += local.E; /* Zeroise buffers and variables to clear sensitive data from memory. */ mbedtls_platform_zeroize( &local, sizeof( local ) ); return( 0 ); } #if !defined(MBEDTLS_DEPRECATED_REMOVED) void mbedtls_sha1_process( mbedtls_sha1_context *ctx, const unsigned char data[64] ) { mbedtls_internal_sha1_process( ctx, data ); } #endif #endif /* !MBEDTLS_SHA1_PROCESS_ALT */ /* * SHA-1 process buffer */ int mbedtls_sha1_update_ret( mbedtls_sha1_context *ctx, const unsigned char *input, size_t ilen ) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; size_t fill; uint32_t left; SHA1_VALIDATE_RET( ctx != NULL ); SHA1_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_sha1_process( ctx, ctx->buffer ) ) != 0 ) return( ret ); input += fill; ilen -= fill; left = 0; } while( ilen >= 64 ) { if( ( ret = mbedtls_internal_sha1_process( ctx, input ) ) != 0 ) return( ret ); input += 64; ilen -= 64; } if( ilen > 0 ) memcpy( (void *) (ctx->buffer + left), input, ilen ); return( 0 ); } #if !defined(MBEDTLS_DEPRECATED_REMOVED) void mbedtls_sha1_update( mbedtls_sha1_context *ctx, const unsigned char *input, size_t ilen ) { mbedtls_sha1_update_ret( ctx, input, ilen ); } #endif /* * SHA-1 final digest */ int mbedtls_sha1_finish_ret( mbedtls_sha1_context *ctx, unsigned char output[20] ) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; uint32_t used; uint32_t high, low; SHA1_VALIDATE_RET( ctx != NULL ); SHA1_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_sha1_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 ); MBEDTLS_PUT_UINT32_BE( high, ctx->buffer, 56 ); MBEDTLS_PUT_UINT32_BE( low, ctx->buffer, 60 ); if( ( ret = mbedtls_internal_sha1_process( ctx, ctx->buffer ) ) != 0 ) return( ret ); /* * Output final state */ MBEDTLS_PUT_UINT32_BE( ctx->state[0], output, 0 ); MBEDTLS_PUT_UINT32_BE( ctx->state[1], output, 4 ); MBEDTLS_PUT_UINT32_BE( ctx->state[2], output, 8 ); MBEDTLS_PUT_UINT32_BE( ctx->state[3], output, 12 ); MBEDTLS_PUT_UINT32_BE( ctx->state[4], output, 16 ); return( 0 ); } #if !defined(MBEDTLS_DEPRECATED_REMOVED) void mbedtls_sha1_finish( mbedtls_sha1_context *ctx, unsigned char output[20] ) { mbedtls_sha1_finish_ret( ctx, output ); } #endif #endif /* !MBEDTLS_SHA1_ALT */ /* * output = SHA-1( input buffer ) */ int mbedtls_sha1_ret( const unsigned char *input, size_t ilen, unsigned char output[20] ) { int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; mbedtls_sha1_context ctx; SHA1_VALIDATE_RET( ilen == 0 || input != NULL ); SHA1_VALIDATE_RET( (unsigned char *)output != NULL ); mbedtls_sha1_init( &ctx ); if( ( ret = mbedtls_sha1_starts_ret( &ctx ) ) != 0 ) goto exit; if( ( ret = mbedtls_sha1_update_ret( &ctx, input, ilen ) ) != 0 ) goto exit; if( ( ret = mbedtls_sha1_finish_ret( &ctx, output ) ) != 0 ) goto exit; exit: mbedtls_sha1_free( &ctx ); return( ret ); } #if !defined(MBEDTLS_DEPRECATED_REMOVED) void mbedtls_sha1( const unsigned char *input, size_t ilen, unsigned char output[20] ) { mbedtls_sha1_ret( input, ilen, output ); } #endif #if defined(MBEDTLS_SELF_TEST) /* * FIPS-180-1 test vectors */ static const unsigned char sha1_test_buf[3][57] = { { "abc" }, { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" }, { "" } }; static const size_t sha1_test_buflen[3] = { 3, 56, 1000 }; static const unsigned char sha1_test_sum[3][20] = { { 0xA9, 0x99, 0x3E, 0x36, 0x47, 0x06, 0x81, 0x6A, 0xBA, 0x3E, 0x25, 0x71, 0x78, 0x50, 0xC2, 0x6C, 0x9C, 0xD0, 0xD8, 0x9D }, { 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E, 0xBA, 0xAE, 0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5, 0xE5, 0x46, 0x70, 0xF1 }, { 0x34, 0xAA, 0x97, 0x3C, 0xD4, 0xC4, 0xDA, 0xA4, 0xF6, 0x1E, 0xEB, 0x2B, 0xDB, 0xAD, 0x27, 0x31, 0x65, 0x34, 0x01, 0x6F } }; /* * Checkup routine */ int mbedtls_sha1_self_test( int verbose ) { int i, j, buflen, ret = 0; 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_ret( &ctx ) ) != 0 ) goto fail; if( i == 2 ) { memset( buf, 'a', buflen = 1000 ); for( j = 0; j < 1000; j++ ) { ret = mbedtls_sha1_update_ret( &ctx, buf, buflen ); if( ret != 0 ) goto fail; } } else { ret = mbedtls_sha1_update_ret( &ctx, sha1_test_buf[i], sha1_test_buflen[i] ); if( ret != 0 ) goto fail; } if( ( ret = mbedtls_sha1_finish_ret( &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 */