[398] | 1 | /*
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| 2 | * NIST SP800-38D compliant GCM implementation
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| 3 | *
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| 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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| 5 | * SPDX-License-Identifier: Apache-2.0
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| 6 | *
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| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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| 8 | * not use this file except in compliance with the License.
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| 9 | * You may obtain a copy of the License at
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| 10 | *
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| 11 | * http://www.apache.org/licenses/LICENSE-2.0
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| 12 | *
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| 13 | * Unless required by applicable law or agreed to in writing, software
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| 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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| 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 16 | * See the License for the specific language governing permissions and
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| 17 | * limitations under the License.
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| 18 | *
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| 19 | * This file is part of mbed TLS (https://tls.mbed.org)
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| 20 | */
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| 21 |
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| 22 | /*
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| 23 | * http://csrc.nist.gov/publications/nistpubs/800-38D/SP-800-38D.pdf
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| 24 | *
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| 25 | * See also:
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| 26 | * [MGV] http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/gcm/gcm-revised-spec.pdf
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| 27 | *
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| 28 | * We use the algorithm described as Shoup's method with 4-bit tables in
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| 29 | * [MGV] 4.1, pp. 12-13, to enhance speed without using too much memory.
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| 30 | */
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| 31 |
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| 32 | #if !defined(MBEDTLS_CONFIG_FILE)
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| 33 | #include "mbedtls/config.h"
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| 34 | #else
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| 35 | #include MBEDTLS_CONFIG_FILE
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| 36 | #endif
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| 37 |
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| 38 | #if defined(MBEDTLS_GCM_C)
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| 39 |
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| 40 | #include "mbedtls/gcm.h"
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| 41 | #include "mbedtls/platform_util.h"
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| 42 |
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| 43 | #include <string.h>
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| 44 |
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| 45 | #if defined(MBEDTLS_AESNI_C)
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| 46 | #include "mbedtls/aesni.h"
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| 47 | #endif
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| 48 |
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| 49 | #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
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| 50 | #include "mbedtls/aes.h"
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| 51 | #include "mbedtls/platform.h"
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| 52 | #if !defined(MBEDTLS_PLATFORM_C)
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| 53 | #include <stdio.h>
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| 54 | #define mbedtls_printf printf
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| 55 | #endif /* MBEDTLS_PLATFORM_C */
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| 56 | #endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
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| 57 |
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| 58 | #if !defined(MBEDTLS_GCM_ALT)
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| 59 |
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| 60 | /* Parameter validation macros */
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| 61 | #define GCM_VALIDATE_RET( cond ) \
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| 62 | MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_GCM_BAD_INPUT )
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| 63 | #define GCM_VALIDATE( cond ) \
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| 64 | MBEDTLS_INTERNAL_VALIDATE( cond )
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| 65 |
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| 66 | /*
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| 67 | * 32-bit integer manipulation macros (big endian)
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| 68 | */
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| 69 | #ifndef GET_UINT32_BE
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| 70 | #define GET_UINT32_BE(n,b,i) \
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| 71 | { \
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| 72 | (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
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| 73 | | ( (uint32_t) (b)[(i) + 1] << 16 ) \
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| 74 | | ( (uint32_t) (b)[(i) + 2] << 8 ) \
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| 75 | | ( (uint32_t) (b)[(i) + 3] ); \
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| 76 | }
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| 77 | #endif
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| 78 |
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| 79 | #ifndef PUT_UINT32_BE
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| 80 | #define PUT_UINT32_BE(n,b,i) \
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| 81 | { \
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| 82 | (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
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| 83 | (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
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| 84 | (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
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| 85 | (b)[(i) + 3] = (unsigned char) ( (n) ); \
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| 86 | }
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| 87 | #endif
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| 88 |
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| 89 | /*
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| 90 | * Initialize a context
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| 91 | */
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| 92 | void mbedtls_gcm_init( mbedtls_gcm_context *ctx )
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| 93 | {
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| 94 | GCM_VALIDATE( ctx != NULL );
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| 95 | memset( ctx, 0, sizeof( mbedtls_gcm_context ) );
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| 96 | }
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| 97 |
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| 98 | /*
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| 99 | * Precompute small multiples of H, that is set
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| 100 | * HH[i] || HL[i] = H times i,
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| 101 | * where i is seen as a field element as in [MGV], ie high-order bits
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| 102 | * correspond to low powers of P. The result is stored in the same way, that
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| 103 | * is the high-order bit of HH corresponds to P^0 and the low-order bit of HL
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| 104 | * corresponds to P^127.
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| 105 | */
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| 106 | static int gcm_gen_table( mbedtls_gcm_context *ctx )
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| 107 | {
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| 108 | int ret, i, j;
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| 109 | uint64_t hi, lo;
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| 110 | uint64_t vl, vh;
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| 111 | unsigned char h[16];
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| 112 | size_t olen = 0;
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| 113 |
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| 114 | memset( h, 0, 16 );
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| 115 | if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, h, 16, h, &olen ) ) != 0 )
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| 116 | return( ret );
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| 117 |
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| 118 | /* pack h as two 64-bits ints, big-endian */
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| 119 | GET_UINT32_BE( hi, h, 0 );
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| 120 | GET_UINT32_BE( lo, h, 4 );
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| 121 | vh = (uint64_t) hi << 32 | lo;
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| 122 |
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| 123 | GET_UINT32_BE( hi, h, 8 );
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| 124 | GET_UINT32_BE( lo, h, 12 );
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| 125 | vl = (uint64_t) hi << 32 | lo;
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| 126 |
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| 127 | /* 8 = 1000 corresponds to 1 in GF(2^128) */
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| 128 | ctx->HL[8] = vl;
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| 129 | ctx->HH[8] = vh;
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| 130 |
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| 131 | #if defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_HAVE_X86_64)
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| 132 | /* With CLMUL support, we need only h, not the rest of the table */
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| 133 | if( mbedtls_aesni_has_support( MBEDTLS_AESNI_CLMUL ) )
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| 134 | return( 0 );
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| 135 | #endif
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| 136 |
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| 137 | /* 0 corresponds to 0 in GF(2^128) */
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| 138 | ctx->HH[0] = 0;
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| 139 | ctx->HL[0] = 0;
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| 140 |
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| 141 | for( i = 4; i > 0; i >>= 1 )
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| 142 | {
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| 143 | uint32_t T = ( vl & 1 ) * 0xe1000000U;
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| 144 | vl = ( vh << 63 ) | ( vl >> 1 );
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| 145 | vh = ( vh >> 1 ) ^ ( (uint64_t) T << 32);
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| 146 |
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| 147 | ctx->HL[i] = vl;
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| 148 | ctx->HH[i] = vh;
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| 149 | }
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| 150 |
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| 151 | for( i = 2; i <= 8; i *= 2 )
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| 152 | {
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| 153 | uint64_t *HiL = ctx->HL + i, *HiH = ctx->HH + i;
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| 154 | vh = *HiH;
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| 155 | vl = *HiL;
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| 156 | for( j = 1; j < i; j++ )
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| 157 | {
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| 158 | HiH[j] = vh ^ ctx->HH[j];
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| 159 | HiL[j] = vl ^ ctx->HL[j];
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| 160 | }
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| 161 | }
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| 162 |
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| 163 | return( 0 );
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| 164 | }
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| 165 |
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| 166 | int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
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| 167 | mbedtls_cipher_id_t cipher,
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| 168 | const unsigned char *key,
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| 169 | unsigned int keybits )
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| 170 | {
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| 171 | int ret;
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| 172 | const mbedtls_cipher_info_t *cipher_info;
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| 173 |
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| 174 | GCM_VALIDATE_RET( ctx != NULL );
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| 175 | GCM_VALIDATE_RET( key != NULL );
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| 176 | GCM_VALIDATE_RET( keybits == 128 || keybits == 192 || keybits == 256 );
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| 177 |
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| 178 | cipher_info = mbedtls_cipher_info_from_values( cipher, keybits, MBEDTLS_MODE_ECB );
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| 179 | if( cipher_info == NULL )
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| 180 | return( MBEDTLS_ERR_GCM_BAD_INPUT );
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| 181 |
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| 182 | if( cipher_info->block_size != 16 )
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| 183 | return( MBEDTLS_ERR_GCM_BAD_INPUT );
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| 184 |
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| 185 | mbedtls_cipher_free( &ctx->cipher_ctx );
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| 186 |
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| 187 | if( ( ret = mbedtls_cipher_setup( &ctx->cipher_ctx, cipher_info ) ) != 0 )
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| 188 | return( ret );
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| 189 |
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| 190 | if( ( ret = mbedtls_cipher_setkey( &ctx->cipher_ctx, key, keybits,
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| 191 | MBEDTLS_ENCRYPT ) ) != 0 )
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| 192 | {
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| 193 | return( ret );
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| 194 | }
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| 195 |
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| 196 | if( ( ret = gcm_gen_table( ctx ) ) != 0 )
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| 197 | return( ret );
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| 198 |
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| 199 | return( 0 );
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| 200 | }
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| 201 |
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| 202 | /*
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| 203 | * Shoup's method for multiplication use this table with
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| 204 | * last4[x] = x times P^128
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| 205 | * where x and last4[x] are seen as elements of GF(2^128) as in [MGV]
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| 206 | */
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| 207 | static const uint64_t last4[16] =
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| 208 | {
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| 209 | 0x0000, 0x1c20, 0x3840, 0x2460,
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| 210 | 0x7080, 0x6ca0, 0x48c0, 0x54e0,
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| 211 | 0xe100, 0xfd20, 0xd940, 0xc560,
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| 212 | 0x9180, 0x8da0, 0xa9c0, 0xb5e0
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| 213 | };
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| 214 |
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| 215 | /*
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| 216 | * Sets output to x times H using the precomputed tables.
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| 217 | * x and output are seen as elements of GF(2^128) as in [MGV].
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| 218 | */
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| 219 | static void gcm_mult( mbedtls_gcm_context *ctx, const unsigned char x[16],
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| 220 | unsigned char output[16] )
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| 221 | {
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| 222 | int i = 0;
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| 223 | unsigned char lo, hi, rem;
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| 224 | uint64_t zh, zl;
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| 225 |
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| 226 | #if defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_HAVE_X86_64)
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| 227 | if( mbedtls_aesni_has_support( MBEDTLS_AESNI_CLMUL ) ) {
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| 228 | unsigned char h[16];
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| 229 |
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| 230 | PUT_UINT32_BE( ctx->HH[8] >> 32, h, 0 );
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| 231 | PUT_UINT32_BE( ctx->HH[8], h, 4 );
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| 232 | PUT_UINT32_BE( ctx->HL[8] >> 32, h, 8 );
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| 233 | PUT_UINT32_BE( ctx->HL[8], h, 12 );
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| 234 |
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| 235 | mbedtls_aesni_gcm_mult( output, x, h );
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| 236 | return;
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| 237 | }
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| 238 | #endif /* MBEDTLS_AESNI_C && MBEDTLS_HAVE_X86_64 */
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| 239 |
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| 240 | lo = x[15] & 0xf;
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| 241 |
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| 242 | zh = ctx->HH[lo];
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| 243 | zl = ctx->HL[lo];
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| 244 |
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| 245 | for( i = 15; i >= 0; i-- )
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| 246 | {
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| 247 | lo = x[i] & 0xf;
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| 248 | hi = x[i] >> 4;
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| 249 |
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| 250 | if( i != 15 )
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| 251 | {
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| 252 | rem = (unsigned char) zl & 0xf;
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| 253 | zl = ( zh << 60 ) | ( zl >> 4 );
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| 254 | zh = ( zh >> 4 );
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| 255 | zh ^= (uint64_t) last4[rem] << 48;
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| 256 | zh ^= ctx->HH[lo];
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| 257 | zl ^= ctx->HL[lo];
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| 258 |
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| 259 | }
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| 260 |
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| 261 | rem = (unsigned char) zl & 0xf;
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| 262 | zl = ( zh << 60 ) | ( zl >> 4 );
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| 263 | zh = ( zh >> 4 );
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| 264 | zh ^= (uint64_t) last4[rem] << 48;
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| 265 | zh ^= ctx->HH[hi];
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| 266 | zl ^= ctx->HL[hi];
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| 267 | }
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| 268 |
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| 269 | PUT_UINT32_BE( zh >> 32, output, 0 );
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| 270 | PUT_UINT32_BE( zh, output, 4 );
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| 271 | PUT_UINT32_BE( zl >> 32, output, 8 );
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| 272 | PUT_UINT32_BE( zl, output, 12 );
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| 273 | }
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| 274 |
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| 275 | int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
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| 276 | int mode,
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| 277 | const unsigned char *iv,
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| 278 | size_t iv_len,
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| 279 | const unsigned char *add,
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| 280 | size_t add_len )
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| 281 | {
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| 282 | int ret;
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| 283 | unsigned char work_buf[16];
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| 284 | size_t i;
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| 285 | const unsigned char *p;
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| 286 | size_t use_len, olen = 0;
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| 287 |
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| 288 | GCM_VALIDATE_RET( ctx != NULL );
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| 289 | GCM_VALIDATE_RET( iv != NULL );
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| 290 | GCM_VALIDATE_RET( add_len == 0 || add != NULL );
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| 291 |
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| 292 | /* IV and AD are limited to 2^64 bits, so 2^61 bytes */
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| 293 | /* IV is not allowed to be zero length */
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| 294 | if( iv_len == 0 ||
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| 295 | ( (uint64_t) iv_len ) >> 61 != 0 ||
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| 296 | ( (uint64_t) add_len ) >> 61 != 0 )
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| 297 | {
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| 298 | return( MBEDTLS_ERR_GCM_BAD_INPUT );
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| 299 | }
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| 300 |
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| 301 | memset( ctx->y, 0x00, sizeof(ctx->y) );
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| 302 | memset( ctx->buf, 0x00, sizeof(ctx->buf) );
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| 303 |
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| 304 | ctx->mode = mode;
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| 305 | ctx->len = 0;
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| 306 | ctx->add_len = 0;
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| 307 |
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| 308 | if( iv_len == 12 )
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| 309 | {
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| 310 | memcpy( ctx->y, iv, iv_len );
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| 311 | ctx->y[15] = 1;
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| 312 | }
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| 313 | else
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| 314 | {
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| 315 | memset( work_buf, 0x00, 16 );
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| 316 | PUT_UINT32_BE( iv_len * 8, work_buf, 12 );
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| 317 |
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| 318 | p = iv;
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| 319 | while( iv_len > 0 )
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| 320 | {
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| 321 | use_len = ( iv_len < 16 ) ? iv_len : 16;
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| 322 |
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| 323 | for( i = 0; i < use_len; i++ )
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| 324 | ctx->y[i] ^= p[i];
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| 325 |
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| 326 | gcm_mult( ctx, ctx->y, ctx->y );
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| 327 |
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| 328 | iv_len -= use_len;
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| 329 | p += use_len;
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| 330 | }
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| 331 |
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| 332 | for( i = 0; i < 16; i++ )
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| 333 | ctx->y[i] ^= work_buf[i];
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| 334 |
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| 335 | gcm_mult( ctx, ctx->y, ctx->y );
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| 336 | }
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| 337 |
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| 338 | if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16, ctx->base_ectr,
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| 339 | &olen ) ) != 0 )
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| 340 | {
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| 341 | return( ret );
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| 342 | }
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| 343 |
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| 344 | ctx->add_len = add_len;
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| 345 | p = add;
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| 346 | while( add_len > 0 )
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| 347 | {
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| 348 | use_len = ( add_len < 16 ) ? add_len : 16;
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| 349 |
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| 350 | for( i = 0; i < use_len; i++ )
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| 351 | ctx->buf[i] ^= p[i];
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| 352 |
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| 353 | gcm_mult( ctx, ctx->buf, ctx->buf );
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| 354 |
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| 355 | add_len -= use_len;
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| 356 | p += use_len;
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| 357 | }
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| 358 |
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| 359 | return( 0 );
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| 360 | }
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| 361 |
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| 362 | int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
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| 363 | size_t length,
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| 364 | const unsigned char *input,
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| 365 | unsigned char *output )
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| 366 | {
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| 367 | int ret;
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| 368 | unsigned char ectr[16];
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| 369 | size_t i;
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| 370 | const unsigned char *p;
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| 371 | unsigned char *out_p = output;
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| 372 | size_t use_len, olen = 0;
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| 373 |
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| 374 | GCM_VALIDATE_RET( ctx != NULL );
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| 375 | GCM_VALIDATE_RET( length == 0 || input != NULL );
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| 376 | GCM_VALIDATE_RET( length == 0 || output != NULL );
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| 377 |
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| 378 | if( output > input && (size_t) ( output - input ) < length )
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| 379 | return( MBEDTLS_ERR_GCM_BAD_INPUT );
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| 380 |
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| 381 | /* Total length is restricted to 2^39 - 256 bits, ie 2^36 - 2^5 bytes
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| 382 | * Also check for possible overflow */
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| 383 | if( ctx->len + length < ctx->len ||
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| 384 | (uint64_t) ctx->len + length > 0xFFFFFFFE0ull )
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| 385 | {
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| 386 | return( MBEDTLS_ERR_GCM_BAD_INPUT );
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| 387 | }
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| 388 |
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| 389 | ctx->len += length;
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| 390 |
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| 391 | p = input;
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| 392 | while( length > 0 )
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| 393 | {
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| 394 | use_len = ( length < 16 ) ? length : 16;
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| 395 |
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| 396 | for( i = 16; i > 12; i-- )
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| 397 | if( ++ctx->y[i - 1] != 0 )
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| 398 | break;
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| 399 |
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| 400 | if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16, ectr,
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| 401 | &olen ) ) != 0 )
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| 402 | {
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| 403 | return( ret );
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| 404 | }
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| 405 |
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| 406 | for( i = 0; i < use_len; i++ )
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| 407 | {
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| 408 | if( ctx->mode == MBEDTLS_GCM_DECRYPT )
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| 409 | ctx->buf[i] ^= p[i];
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| 410 | out_p[i] = ectr[i] ^ p[i];
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| 411 | if( ctx->mode == MBEDTLS_GCM_ENCRYPT )
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| 412 | ctx->buf[i] ^= out_p[i];
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| 413 | }
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| 414 |
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| 415 | gcm_mult( ctx, ctx->buf, ctx->buf );
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| 416 |
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| 417 | length -= use_len;
|
---|
| 418 | p += use_len;
|
---|
| 419 | out_p += use_len;
|
---|
| 420 | }
|
---|
| 421 |
|
---|
| 422 | return( 0 );
|
---|
| 423 | }
|
---|
| 424 |
|
---|
| 425 | int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
|
---|
| 426 | unsigned char *tag,
|
---|
| 427 | size_t tag_len )
|
---|
| 428 | {
|
---|
| 429 | unsigned char work_buf[16];
|
---|
| 430 | size_t i;
|
---|
| 431 | uint64_t orig_len;
|
---|
| 432 | uint64_t orig_add_len;
|
---|
| 433 |
|
---|
| 434 | GCM_VALIDATE_RET( ctx != NULL );
|
---|
| 435 | GCM_VALIDATE_RET( tag != NULL );
|
---|
| 436 |
|
---|
| 437 | orig_len = ctx->len * 8;
|
---|
| 438 | orig_add_len = ctx->add_len * 8;
|
---|
| 439 |
|
---|
| 440 | if( tag_len > 16 || tag_len < 4 )
|
---|
| 441 | return( MBEDTLS_ERR_GCM_BAD_INPUT );
|
---|
| 442 |
|
---|
| 443 | memcpy( tag, ctx->base_ectr, tag_len );
|
---|
| 444 |
|
---|
| 445 | if( orig_len || orig_add_len )
|
---|
| 446 | {
|
---|
| 447 | memset( work_buf, 0x00, 16 );
|
---|
| 448 |
|
---|
| 449 | PUT_UINT32_BE( ( orig_add_len >> 32 ), work_buf, 0 );
|
---|
| 450 | PUT_UINT32_BE( ( orig_add_len ), work_buf, 4 );
|
---|
| 451 | PUT_UINT32_BE( ( orig_len >> 32 ), work_buf, 8 );
|
---|
| 452 | PUT_UINT32_BE( ( orig_len ), work_buf, 12 );
|
---|
| 453 |
|
---|
| 454 | for( i = 0; i < 16; i++ )
|
---|
| 455 | ctx->buf[i] ^= work_buf[i];
|
---|
| 456 |
|
---|
| 457 | gcm_mult( ctx, ctx->buf, ctx->buf );
|
---|
| 458 |
|
---|
| 459 | for( i = 0; i < tag_len; i++ )
|
---|
| 460 | tag[i] ^= ctx->buf[i];
|
---|
| 461 | }
|
---|
| 462 |
|
---|
| 463 | return( 0 );
|
---|
| 464 | }
|
---|
| 465 |
|
---|
| 466 | int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
|
---|
| 467 | int mode,
|
---|
| 468 | size_t length,
|
---|
| 469 | const unsigned char *iv,
|
---|
| 470 | size_t iv_len,
|
---|
| 471 | const unsigned char *add,
|
---|
| 472 | size_t add_len,
|
---|
| 473 | const unsigned char *input,
|
---|
| 474 | unsigned char *output,
|
---|
| 475 | size_t tag_len,
|
---|
| 476 | unsigned char *tag )
|
---|
| 477 | {
|
---|
| 478 | int ret;
|
---|
| 479 |
|
---|
| 480 | GCM_VALIDATE_RET( ctx != NULL );
|
---|
| 481 | GCM_VALIDATE_RET( iv != NULL );
|
---|
| 482 | GCM_VALIDATE_RET( add_len == 0 || add != NULL );
|
---|
| 483 | GCM_VALIDATE_RET( length == 0 || input != NULL );
|
---|
| 484 | GCM_VALIDATE_RET( length == 0 || output != NULL );
|
---|
| 485 | GCM_VALIDATE_RET( tag != NULL );
|
---|
| 486 |
|
---|
| 487 | if( ( ret = mbedtls_gcm_starts( ctx, mode, iv, iv_len, add, add_len ) ) != 0 )
|
---|
| 488 | return( ret );
|
---|
| 489 |
|
---|
| 490 | if( ( ret = mbedtls_gcm_update( ctx, length, input, output ) ) != 0 )
|
---|
| 491 | return( ret );
|
---|
| 492 |
|
---|
| 493 | if( ( ret = mbedtls_gcm_finish( ctx, tag, tag_len ) ) != 0 )
|
---|
| 494 | return( ret );
|
---|
| 495 |
|
---|
| 496 | return( 0 );
|
---|
| 497 | }
|
---|
| 498 |
|
---|
| 499 | int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
|
---|
| 500 | size_t length,
|
---|
| 501 | const unsigned char *iv,
|
---|
| 502 | size_t iv_len,
|
---|
| 503 | const unsigned char *add,
|
---|
| 504 | size_t add_len,
|
---|
| 505 | const unsigned char *tag,
|
---|
| 506 | size_t tag_len,
|
---|
| 507 | const unsigned char *input,
|
---|
| 508 | unsigned char *output )
|
---|
| 509 | {
|
---|
| 510 | int ret;
|
---|
| 511 | unsigned char check_tag[16];
|
---|
| 512 | size_t i;
|
---|
| 513 | int diff;
|
---|
| 514 |
|
---|
| 515 | GCM_VALIDATE_RET( ctx != NULL );
|
---|
| 516 | GCM_VALIDATE_RET( iv != NULL );
|
---|
| 517 | GCM_VALIDATE_RET( add_len == 0 || add != NULL );
|
---|
| 518 | GCM_VALIDATE_RET( tag != NULL );
|
---|
| 519 | GCM_VALIDATE_RET( length == 0 || input != NULL );
|
---|
| 520 | GCM_VALIDATE_RET( length == 0 || output != NULL );
|
---|
| 521 |
|
---|
| 522 | if( ( ret = mbedtls_gcm_crypt_and_tag( ctx, MBEDTLS_GCM_DECRYPT, length,
|
---|
| 523 | iv, iv_len, add, add_len,
|
---|
| 524 | input, output, tag_len, check_tag ) ) != 0 )
|
---|
| 525 | {
|
---|
| 526 | return( ret );
|
---|
| 527 | }
|
---|
| 528 |
|
---|
| 529 | /* Check tag in "constant-time" */
|
---|
| 530 | for( diff = 0, i = 0; i < tag_len; i++ )
|
---|
| 531 | diff |= tag[i] ^ check_tag[i];
|
---|
| 532 |
|
---|
| 533 | if( diff != 0 )
|
---|
| 534 | {
|
---|
| 535 | mbedtls_platform_zeroize( output, length );
|
---|
| 536 | return( MBEDTLS_ERR_GCM_AUTH_FAILED );
|
---|
| 537 | }
|
---|
| 538 |
|
---|
| 539 | return( 0 );
|
---|
| 540 | }
|
---|
| 541 |
|
---|
| 542 | void mbedtls_gcm_free( mbedtls_gcm_context *ctx )
|
---|
| 543 | {
|
---|
| 544 | if( ctx == NULL )
|
---|
| 545 | return;
|
---|
| 546 | mbedtls_cipher_free( &ctx->cipher_ctx );
|
---|
| 547 | mbedtls_platform_zeroize( ctx, sizeof( mbedtls_gcm_context ) );
|
---|
| 548 | }
|
---|
| 549 |
|
---|
| 550 | #endif /* !MBEDTLS_GCM_ALT */
|
---|
| 551 |
|
---|
| 552 | #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
|
---|
| 553 | /*
|
---|
| 554 | * AES-GCM test vectors from:
|
---|
| 555 | *
|
---|
| 556 | * http://csrc.nist.gov/groups/STM/cavp/documents/mac/gcmtestvectors.zip
|
---|
| 557 | */
|
---|
| 558 | #define MAX_TESTS 6
|
---|
| 559 |
|
---|
| 560 | static const int key_index[MAX_TESTS] =
|
---|
| 561 | { 0, 0, 1, 1, 1, 1 };
|
---|
| 562 |
|
---|
| 563 | static const unsigned char key[MAX_TESTS][32] =
|
---|
| 564 | {
|
---|
| 565 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
---|
| 566 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
---|
| 567 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
---|
| 568 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
---|
| 569 | { 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
|
---|
| 570 | 0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08,
|
---|
| 571 | 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
|
---|
| 572 | 0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08 },
|
---|
| 573 | };
|
---|
| 574 |
|
---|
| 575 | static const size_t iv_len[MAX_TESTS] =
|
---|
| 576 | { 12, 12, 12, 12, 8, 60 };
|
---|
| 577 |
|
---|
| 578 | static const int iv_index[MAX_TESTS] =
|
---|
| 579 | { 0, 0, 1, 1, 1, 2 };
|
---|
| 580 |
|
---|
| 581 | static const unsigned char iv[MAX_TESTS][64] =
|
---|
| 582 | {
|
---|
| 583 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
---|
| 584 | 0x00, 0x00, 0x00, 0x00 },
|
---|
| 585 | { 0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad,
|
---|
| 586 | 0xde, 0xca, 0xf8, 0x88 },
|
---|
| 587 | { 0x93, 0x13, 0x22, 0x5d, 0xf8, 0x84, 0x06, 0xe5,
|
---|
| 588 | 0x55, 0x90, 0x9c, 0x5a, 0xff, 0x52, 0x69, 0xaa,
|
---|
| 589 | 0x6a, 0x7a, 0x95, 0x38, 0x53, 0x4f, 0x7d, 0xa1,
|
---|
| 590 | 0xe4, 0xc3, 0x03, 0xd2, 0xa3, 0x18, 0xa7, 0x28,
|
---|
| 591 | 0xc3, 0xc0, 0xc9, 0x51, 0x56, 0x80, 0x95, 0x39,
|
---|
| 592 | 0xfc, 0xf0, 0xe2, 0x42, 0x9a, 0x6b, 0x52, 0x54,
|
---|
| 593 | 0x16, 0xae, 0xdb, 0xf5, 0xa0, 0xde, 0x6a, 0x57,
|
---|
| 594 | 0xa6, 0x37, 0xb3, 0x9b },
|
---|
| 595 | };
|
---|
| 596 |
|
---|
| 597 | static const size_t add_len[MAX_TESTS] =
|
---|
| 598 | { 0, 0, 0, 20, 20, 20 };
|
---|
| 599 |
|
---|
| 600 | static const int add_index[MAX_TESTS] =
|
---|
| 601 | { 0, 0, 0, 1, 1, 1 };
|
---|
| 602 |
|
---|
| 603 | static const unsigned char additional[MAX_TESTS][64] =
|
---|
| 604 | {
|
---|
| 605 | { 0x00 },
|
---|
| 606 | { 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
|
---|
| 607 | 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
|
---|
| 608 | 0xab, 0xad, 0xda, 0xd2 },
|
---|
| 609 | };
|
---|
| 610 |
|
---|
| 611 | static const size_t pt_len[MAX_TESTS] =
|
---|
| 612 | { 0, 16, 64, 60, 60, 60 };
|
---|
| 613 |
|
---|
| 614 | static const int pt_index[MAX_TESTS] =
|
---|
| 615 | { 0, 0, 1, 1, 1, 1 };
|
---|
| 616 |
|
---|
| 617 | static const unsigned char pt[MAX_TESTS][64] =
|
---|
| 618 | {
|
---|
| 619 | { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
---|
| 620 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
|
---|
| 621 | { 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
|
---|
| 622 | 0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
|
---|
| 623 | 0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
|
---|
| 624 | 0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
|
---|
| 625 | 0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
|
---|
| 626 | 0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
|
---|
| 627 | 0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
|
---|
| 628 | 0xba, 0x63, 0x7b, 0x39, 0x1a, 0xaf, 0xd2, 0x55 },
|
---|
| 629 | };
|
---|
| 630 |
|
---|
| 631 | static const unsigned char ct[MAX_TESTS * 3][64] =
|
---|
| 632 | {
|
---|
| 633 | { 0x00 },
|
---|
| 634 | { 0x03, 0x88, 0xda, 0xce, 0x60, 0xb6, 0xa3, 0x92,
|
---|
| 635 | 0xf3, 0x28, 0xc2, 0xb9, 0x71, 0xb2, 0xfe, 0x78 },
|
---|
| 636 | { 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
|
---|
| 637 | 0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
|
---|
| 638 | 0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
|
---|
| 639 | 0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
|
---|
| 640 | 0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
|
---|
| 641 | 0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
|
---|
| 642 | 0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
|
---|
| 643 | 0x3d, 0x58, 0xe0, 0x91, 0x47, 0x3f, 0x59, 0x85 },
|
---|
| 644 | { 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
|
---|
| 645 | 0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
|
---|
| 646 | 0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
|
---|
| 647 | 0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
|
---|
| 648 | 0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
|
---|
| 649 | 0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
|
---|
| 650 | 0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
|
---|
| 651 | 0x3d, 0x58, 0xe0, 0x91 },
|
---|
| 652 | { 0x61, 0x35, 0x3b, 0x4c, 0x28, 0x06, 0x93, 0x4a,
|
---|
| 653 | 0x77, 0x7f, 0xf5, 0x1f, 0xa2, 0x2a, 0x47, 0x55,
|
---|
| 654 | 0x69, 0x9b, 0x2a, 0x71, 0x4f, 0xcd, 0xc6, 0xf8,
|
---|
| 655 | 0x37, 0x66, 0xe5, 0xf9, 0x7b, 0x6c, 0x74, 0x23,
|
---|
| 656 | 0x73, 0x80, 0x69, 0x00, 0xe4, 0x9f, 0x24, 0xb2,
|
---|
| 657 | 0x2b, 0x09, 0x75, 0x44, 0xd4, 0x89, 0x6b, 0x42,
|
---|
| 658 | 0x49, 0x89, 0xb5, 0xe1, 0xeb, 0xac, 0x0f, 0x07,
|
---|
| 659 | 0xc2, 0x3f, 0x45, 0x98 },
|
---|
| 660 | { 0x8c, 0xe2, 0x49, 0x98, 0x62, 0x56, 0x15, 0xb6,
|
---|
| 661 | 0x03, 0xa0, 0x33, 0xac, 0xa1, 0x3f, 0xb8, 0x94,
|
---|
| 662 | 0xbe, 0x91, 0x12, 0xa5, 0xc3, 0xa2, 0x11, 0xa8,
|
---|
| 663 | 0xba, 0x26, 0x2a, 0x3c, 0xca, 0x7e, 0x2c, 0xa7,
|
---|
| 664 | 0x01, 0xe4, 0xa9, 0xa4, 0xfb, 0xa4, 0x3c, 0x90,
|
---|
| 665 | 0xcc, 0xdc, 0xb2, 0x81, 0xd4, 0x8c, 0x7c, 0x6f,
|
---|
| 666 | 0xd6, 0x28, 0x75, 0xd2, 0xac, 0xa4, 0x17, 0x03,
|
---|
| 667 | 0x4c, 0x34, 0xae, 0xe5 },
|
---|
| 668 | { 0x00 },
|
---|
| 669 | { 0x98, 0xe7, 0x24, 0x7c, 0x07, 0xf0, 0xfe, 0x41,
|
---|
| 670 | 0x1c, 0x26, 0x7e, 0x43, 0x84, 0xb0, 0xf6, 0x00 },
|
---|
| 671 | { 0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41,
|
---|
| 672 | 0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, 0x27, 0x57,
|
---|
| 673 | 0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84,
|
---|
| 674 | 0x62, 0x85, 0x93, 0xb4, 0x0c, 0xa1, 0xe1, 0x9c,
|
---|
| 675 | 0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25,
|
---|
| 676 | 0xac, 0x61, 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47,
|
---|
| 677 | 0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9,
|
---|
| 678 | 0xcc, 0xda, 0x27, 0x10, 0xac, 0xad, 0xe2, 0x56 },
|
---|
| 679 | { 0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41,
|
---|
| 680 | 0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, 0x27, 0x57,
|
---|
| 681 | 0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84,
|
---|
| 682 | 0x62, 0x85, 0x93, 0xb4, 0x0c, 0xa1, 0xe1, 0x9c,
|
---|
| 683 | 0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25,
|
---|
| 684 | 0xac, 0x61, 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47,
|
---|
| 685 | 0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9,
|
---|
| 686 | 0xcc, 0xda, 0x27, 0x10 },
|
---|
| 687 | { 0x0f, 0x10, 0xf5, 0x99, 0xae, 0x14, 0xa1, 0x54,
|
---|
| 688 | 0xed, 0x24, 0xb3, 0x6e, 0x25, 0x32, 0x4d, 0xb8,
|
---|
| 689 | 0xc5, 0x66, 0x63, 0x2e, 0xf2, 0xbb, 0xb3, 0x4f,
|
---|
| 690 | 0x83, 0x47, 0x28, 0x0f, 0xc4, 0x50, 0x70, 0x57,
|
---|
| 691 | 0xfd, 0xdc, 0x29, 0xdf, 0x9a, 0x47, 0x1f, 0x75,
|
---|
| 692 | 0xc6, 0x65, 0x41, 0xd4, 0xd4, 0xda, 0xd1, 0xc9,
|
---|
| 693 | 0xe9, 0x3a, 0x19, 0xa5, 0x8e, 0x8b, 0x47, 0x3f,
|
---|
| 694 | 0xa0, 0xf0, 0x62, 0xf7 },
|
---|
| 695 | { 0xd2, 0x7e, 0x88, 0x68, 0x1c, 0xe3, 0x24, 0x3c,
|
---|
| 696 | 0x48, 0x30, 0x16, 0x5a, 0x8f, 0xdc, 0xf9, 0xff,
|
---|
| 697 | 0x1d, 0xe9, 0xa1, 0xd8, 0xe6, 0xb4, 0x47, 0xef,
|
---|
| 698 | 0x6e, 0xf7, 0xb7, 0x98, 0x28, 0x66, 0x6e, 0x45,
|
---|
| 699 | 0x81, 0xe7, 0x90, 0x12, 0xaf, 0x34, 0xdd, 0xd9,
|
---|
| 700 | 0xe2, 0xf0, 0x37, 0x58, 0x9b, 0x29, 0x2d, 0xb3,
|
---|
| 701 | 0xe6, 0x7c, 0x03, 0x67, 0x45, 0xfa, 0x22, 0xe7,
|
---|
| 702 | 0xe9, 0xb7, 0x37, 0x3b },
|
---|
| 703 | { 0x00 },
|
---|
| 704 | { 0xce, 0xa7, 0x40, 0x3d, 0x4d, 0x60, 0x6b, 0x6e,
|
---|
| 705 | 0x07, 0x4e, 0xc5, 0xd3, 0xba, 0xf3, 0x9d, 0x18 },
|
---|
| 706 | { 0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07,
|
---|
| 707 | 0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, 0x42, 0x7d,
|
---|
| 708 | 0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9,
|
---|
| 709 | 0x75, 0x98, 0xa2, 0xbd, 0x25, 0x55, 0xd1, 0xaa,
|
---|
| 710 | 0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d,
|
---|
| 711 | 0xa7, 0xb0, 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38,
|
---|
| 712 | 0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a,
|
---|
| 713 | 0xbc, 0xc9, 0xf6, 0x62, 0x89, 0x80, 0x15, 0xad },
|
---|
| 714 | { 0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07,
|
---|
| 715 | 0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, 0x42, 0x7d,
|
---|
| 716 | 0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9,
|
---|
| 717 | 0x75, 0x98, 0xa2, 0xbd, 0x25, 0x55, 0xd1, 0xaa,
|
---|
| 718 | 0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d,
|
---|
| 719 | 0xa7, 0xb0, 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38,
|
---|
| 720 | 0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a,
|
---|
| 721 | 0xbc, 0xc9, 0xf6, 0x62 },
|
---|
| 722 | { 0xc3, 0x76, 0x2d, 0xf1, 0xca, 0x78, 0x7d, 0x32,
|
---|
| 723 | 0xae, 0x47, 0xc1, 0x3b, 0xf1, 0x98, 0x44, 0xcb,
|
---|
| 724 | 0xaf, 0x1a, 0xe1, 0x4d, 0x0b, 0x97, 0x6a, 0xfa,
|
---|
| 725 | 0xc5, 0x2f, 0xf7, 0xd7, 0x9b, 0xba, 0x9d, 0xe0,
|
---|
| 726 | 0xfe, 0xb5, 0x82, 0xd3, 0x39, 0x34, 0xa4, 0xf0,
|
---|
| 727 | 0x95, 0x4c, 0xc2, 0x36, 0x3b, 0xc7, 0x3f, 0x78,
|
---|
| 728 | 0x62, 0xac, 0x43, 0x0e, 0x64, 0xab, 0xe4, 0x99,
|
---|
| 729 | 0xf4, 0x7c, 0x9b, 0x1f },
|
---|
| 730 | { 0x5a, 0x8d, 0xef, 0x2f, 0x0c, 0x9e, 0x53, 0xf1,
|
---|
| 731 | 0xf7, 0x5d, 0x78, 0x53, 0x65, 0x9e, 0x2a, 0x20,
|
---|
| 732 | 0xee, 0xb2, 0xb2, 0x2a, 0xaf, 0xde, 0x64, 0x19,
|
---|
| 733 | 0xa0, 0x58, 0xab, 0x4f, 0x6f, 0x74, 0x6b, 0xf4,
|
---|
| 734 | 0x0f, 0xc0, 0xc3, 0xb7, 0x80, 0xf2, 0x44, 0x45,
|
---|
| 735 | 0x2d, 0xa3, 0xeb, 0xf1, 0xc5, 0xd8, 0x2c, 0xde,
|
---|
| 736 | 0xa2, 0x41, 0x89, 0x97, 0x20, 0x0e, 0xf8, 0x2e,
|
---|
| 737 | 0x44, 0xae, 0x7e, 0x3f },
|
---|
| 738 | };
|
---|
| 739 |
|
---|
| 740 | static const unsigned char tag[MAX_TESTS * 3][16] =
|
---|
| 741 | {
|
---|
| 742 | { 0x58, 0xe2, 0xfc, 0xce, 0xfa, 0x7e, 0x30, 0x61,
|
---|
| 743 | 0x36, 0x7f, 0x1d, 0x57, 0xa4, 0xe7, 0x45, 0x5a },
|
---|
| 744 | { 0xab, 0x6e, 0x47, 0xd4, 0x2c, 0xec, 0x13, 0xbd,
|
---|
| 745 | 0xf5, 0x3a, 0x67, 0xb2, 0x12, 0x57, 0xbd, 0xdf },
|
---|
| 746 | { 0x4d, 0x5c, 0x2a, 0xf3, 0x27, 0xcd, 0x64, 0xa6,
|
---|
| 747 | 0x2c, 0xf3, 0x5a, 0xbd, 0x2b, 0xa6, 0xfa, 0xb4 },
|
---|
| 748 | { 0x5b, 0xc9, 0x4f, 0xbc, 0x32, 0x21, 0xa5, 0xdb,
|
---|
| 749 | 0x94, 0xfa, 0xe9, 0x5a, 0xe7, 0x12, 0x1a, 0x47 },
|
---|
| 750 | { 0x36, 0x12, 0xd2, 0xe7, 0x9e, 0x3b, 0x07, 0x85,
|
---|
| 751 | 0x56, 0x1b, 0xe1, 0x4a, 0xac, 0xa2, 0xfc, 0xcb },
|
---|
| 752 | { 0x61, 0x9c, 0xc5, 0xae, 0xff, 0xfe, 0x0b, 0xfa,
|
---|
| 753 | 0x46, 0x2a, 0xf4, 0x3c, 0x16, 0x99, 0xd0, 0x50 },
|
---|
| 754 | { 0xcd, 0x33, 0xb2, 0x8a, 0xc7, 0x73, 0xf7, 0x4b,
|
---|
| 755 | 0xa0, 0x0e, 0xd1, 0xf3, 0x12, 0x57, 0x24, 0x35 },
|
---|
| 756 | { 0x2f, 0xf5, 0x8d, 0x80, 0x03, 0x39, 0x27, 0xab,
|
---|
| 757 | 0x8e, 0xf4, 0xd4, 0x58, 0x75, 0x14, 0xf0, 0xfb },
|
---|
| 758 | { 0x99, 0x24, 0xa7, 0xc8, 0x58, 0x73, 0x36, 0xbf,
|
---|
| 759 | 0xb1, 0x18, 0x02, 0x4d, 0xb8, 0x67, 0x4a, 0x14 },
|
---|
| 760 | { 0x25, 0x19, 0x49, 0x8e, 0x80, 0xf1, 0x47, 0x8f,
|
---|
| 761 | 0x37, 0xba, 0x55, 0xbd, 0x6d, 0x27, 0x61, 0x8c },
|
---|
| 762 | { 0x65, 0xdc, 0xc5, 0x7f, 0xcf, 0x62, 0x3a, 0x24,
|
---|
| 763 | 0x09, 0x4f, 0xcc, 0xa4, 0x0d, 0x35, 0x33, 0xf8 },
|
---|
| 764 | { 0xdc, 0xf5, 0x66, 0xff, 0x29, 0x1c, 0x25, 0xbb,
|
---|
| 765 | 0xb8, 0x56, 0x8f, 0xc3, 0xd3, 0x76, 0xa6, 0xd9 },
|
---|
| 766 | { 0x53, 0x0f, 0x8a, 0xfb, 0xc7, 0x45, 0x36, 0xb9,
|
---|
| 767 | 0xa9, 0x63, 0xb4, 0xf1, 0xc4, 0xcb, 0x73, 0x8b },
|
---|
| 768 | { 0xd0, 0xd1, 0xc8, 0xa7, 0x99, 0x99, 0x6b, 0xf0,
|
---|
| 769 | 0x26, 0x5b, 0x98, 0xb5, 0xd4, 0x8a, 0xb9, 0x19 },
|
---|
| 770 | { 0xb0, 0x94, 0xda, 0xc5, 0xd9, 0x34, 0x71, 0xbd,
|
---|
| 771 | 0xec, 0x1a, 0x50, 0x22, 0x70, 0xe3, 0xcc, 0x6c },
|
---|
| 772 | { 0x76, 0xfc, 0x6e, 0xce, 0x0f, 0x4e, 0x17, 0x68,
|
---|
| 773 | 0xcd, 0xdf, 0x88, 0x53, 0xbb, 0x2d, 0x55, 0x1b },
|
---|
| 774 | { 0x3a, 0x33, 0x7d, 0xbf, 0x46, 0xa7, 0x92, 0xc4,
|
---|
| 775 | 0x5e, 0x45, 0x49, 0x13, 0xfe, 0x2e, 0xa8, 0xf2 },
|
---|
| 776 | { 0xa4, 0x4a, 0x82, 0x66, 0xee, 0x1c, 0x8e, 0xb0,
|
---|
| 777 | 0xc8, 0xb5, 0xd4, 0xcf, 0x5a, 0xe9, 0xf1, 0x9a },
|
---|
| 778 | };
|
---|
| 779 |
|
---|
| 780 | int mbedtls_gcm_self_test( int verbose )
|
---|
| 781 | {
|
---|
| 782 | mbedtls_gcm_context ctx;
|
---|
| 783 | unsigned char buf[64];
|
---|
| 784 | unsigned char tag_buf[16];
|
---|
| 785 | int i, j, ret;
|
---|
| 786 | mbedtls_cipher_id_t cipher = MBEDTLS_CIPHER_ID_AES;
|
---|
| 787 |
|
---|
| 788 | for( j = 0; j < 3; j++ )
|
---|
| 789 | {
|
---|
| 790 | int key_len = 128 + 64 * j;
|
---|
| 791 |
|
---|
| 792 | for( i = 0; i < MAX_TESTS; i++ )
|
---|
| 793 | {
|
---|
| 794 | mbedtls_gcm_init( &ctx );
|
---|
| 795 |
|
---|
| 796 | if( verbose != 0 )
|
---|
| 797 | mbedtls_printf( " AES-GCM-%3d #%d (%s): ",
|
---|
| 798 | key_len, i, "enc" );
|
---|
| 799 |
|
---|
| 800 | ret = mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]],
|
---|
| 801 | key_len );
|
---|
| 802 | /*
|
---|
| 803 | * AES-192 is an optional feature that may be unavailable when
|
---|
| 804 | * there is an alternative underlying implementation i.e. when
|
---|
| 805 | * MBEDTLS_AES_ALT is defined.
|
---|
| 806 | */
|
---|
| 807 | if( ret == MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED && key_len == 192 )
|
---|
| 808 | {
|
---|
| 809 | mbedtls_printf( "skipped\n" );
|
---|
| 810 | break;
|
---|
| 811 | }
|
---|
| 812 | else if( ret != 0 )
|
---|
| 813 | {
|
---|
| 814 | goto exit;
|
---|
| 815 | }
|
---|
| 816 |
|
---|
| 817 | ret = mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_ENCRYPT,
|
---|
| 818 | pt_len[i],
|
---|
| 819 | iv[iv_index[i]], iv_len[i],
|
---|
| 820 | additional[add_index[i]], add_len[i],
|
---|
| 821 | pt[pt_index[i]], buf, 16, tag_buf );
|
---|
| 822 | if( ret != 0 )
|
---|
| 823 | goto exit;
|
---|
| 824 |
|
---|
| 825 | if ( memcmp( buf, ct[j * 6 + i], pt_len[i] ) != 0 ||
|
---|
| 826 | memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
|
---|
| 827 | {
|
---|
| 828 | ret = 1;
|
---|
| 829 | goto exit;
|
---|
| 830 | }
|
---|
| 831 |
|
---|
| 832 | mbedtls_gcm_free( &ctx );
|
---|
| 833 |
|
---|
| 834 | if( verbose != 0 )
|
---|
| 835 | mbedtls_printf( "passed\n" );
|
---|
| 836 |
|
---|
| 837 | mbedtls_gcm_init( &ctx );
|
---|
| 838 |
|
---|
| 839 | if( verbose != 0 )
|
---|
| 840 | mbedtls_printf( " AES-GCM-%3d #%d (%s): ",
|
---|
| 841 | key_len, i, "dec" );
|
---|
| 842 |
|
---|
| 843 | ret = mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]],
|
---|
| 844 | key_len );
|
---|
| 845 | if( ret != 0 )
|
---|
| 846 | goto exit;
|
---|
| 847 |
|
---|
| 848 | ret = mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_DECRYPT,
|
---|
| 849 | pt_len[i],
|
---|
| 850 | iv[iv_index[i]], iv_len[i],
|
---|
| 851 | additional[add_index[i]], add_len[i],
|
---|
| 852 | ct[j * 6 + i], buf, 16, tag_buf );
|
---|
| 853 |
|
---|
| 854 | if( ret != 0 )
|
---|
| 855 | goto exit;
|
---|
| 856 |
|
---|
| 857 | if( memcmp( buf, pt[pt_index[i]], pt_len[i] ) != 0 ||
|
---|
| 858 | memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
|
---|
| 859 | {
|
---|
| 860 | ret = 1;
|
---|
| 861 | goto exit;
|
---|
| 862 | }
|
---|
| 863 |
|
---|
| 864 | mbedtls_gcm_free( &ctx );
|
---|
| 865 |
|
---|
| 866 | if( verbose != 0 )
|
---|
| 867 | mbedtls_printf( "passed\n" );
|
---|
| 868 |
|
---|
| 869 | mbedtls_gcm_init( &ctx );
|
---|
| 870 |
|
---|
| 871 | if( verbose != 0 )
|
---|
| 872 | mbedtls_printf( " AES-GCM-%3d #%d split (%s): ",
|
---|
| 873 | key_len, i, "enc" );
|
---|
| 874 |
|
---|
| 875 | ret = mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]],
|
---|
| 876 | key_len );
|
---|
| 877 | if( ret != 0 )
|
---|
| 878 | goto exit;
|
---|
| 879 |
|
---|
| 880 | ret = mbedtls_gcm_starts( &ctx, MBEDTLS_GCM_ENCRYPT,
|
---|
| 881 | iv[iv_index[i]], iv_len[i],
|
---|
| 882 | additional[add_index[i]], add_len[i] );
|
---|
| 883 | if( ret != 0 )
|
---|
| 884 | goto exit;
|
---|
| 885 |
|
---|
| 886 | if( pt_len[i] > 32 )
|
---|
| 887 | {
|
---|
| 888 | size_t rest_len = pt_len[i] - 32;
|
---|
| 889 | ret = mbedtls_gcm_update( &ctx, 32, pt[pt_index[i]], buf );
|
---|
| 890 | if( ret != 0 )
|
---|
| 891 | goto exit;
|
---|
| 892 |
|
---|
| 893 | ret = mbedtls_gcm_update( &ctx, rest_len, pt[pt_index[i]] + 32,
|
---|
| 894 | buf + 32 );
|
---|
| 895 | if( ret != 0 )
|
---|
| 896 | goto exit;
|
---|
| 897 | }
|
---|
| 898 | else
|
---|
| 899 | {
|
---|
| 900 | ret = mbedtls_gcm_update( &ctx, pt_len[i], pt[pt_index[i]], buf );
|
---|
| 901 | if( ret != 0 )
|
---|
| 902 | goto exit;
|
---|
| 903 | }
|
---|
| 904 |
|
---|
| 905 | ret = mbedtls_gcm_finish( &ctx, tag_buf, 16 );
|
---|
| 906 | if( ret != 0 )
|
---|
| 907 | goto exit;
|
---|
| 908 |
|
---|
| 909 | if( memcmp( buf, ct[j * 6 + i], pt_len[i] ) != 0 ||
|
---|
| 910 | memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
|
---|
| 911 | {
|
---|
| 912 | ret = 1;
|
---|
| 913 | goto exit;
|
---|
| 914 | }
|
---|
| 915 |
|
---|
| 916 | mbedtls_gcm_free( &ctx );
|
---|
| 917 |
|
---|
| 918 | if( verbose != 0 )
|
---|
| 919 | mbedtls_printf( "passed\n" );
|
---|
| 920 |
|
---|
| 921 | mbedtls_gcm_init( &ctx );
|
---|
| 922 |
|
---|
| 923 | if( verbose != 0 )
|
---|
| 924 | mbedtls_printf( " AES-GCM-%3d #%d split (%s): ",
|
---|
| 925 | key_len, i, "dec" );
|
---|
| 926 |
|
---|
| 927 | ret = mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]],
|
---|
| 928 | key_len );
|
---|
| 929 | if( ret != 0 )
|
---|
| 930 | goto exit;
|
---|
| 931 |
|
---|
| 932 | ret = mbedtls_gcm_starts( &ctx, MBEDTLS_GCM_DECRYPT,
|
---|
| 933 | iv[iv_index[i]], iv_len[i],
|
---|
| 934 | additional[add_index[i]], add_len[i] );
|
---|
| 935 | if( ret != 0 )
|
---|
| 936 | goto exit;
|
---|
| 937 |
|
---|
| 938 | if( pt_len[i] > 32 )
|
---|
| 939 | {
|
---|
| 940 | size_t rest_len = pt_len[i] - 32;
|
---|
| 941 | ret = mbedtls_gcm_update( &ctx, 32, ct[j * 6 + i], buf );
|
---|
| 942 | if( ret != 0 )
|
---|
| 943 | goto exit;
|
---|
| 944 |
|
---|
| 945 | ret = mbedtls_gcm_update( &ctx, rest_len, ct[j * 6 + i] + 32,
|
---|
| 946 | buf + 32 );
|
---|
| 947 | if( ret != 0 )
|
---|
| 948 | goto exit;
|
---|
| 949 | }
|
---|
| 950 | else
|
---|
| 951 | {
|
---|
| 952 | ret = mbedtls_gcm_update( &ctx, pt_len[i], ct[j * 6 + i],
|
---|
| 953 | buf );
|
---|
| 954 | if( ret != 0 )
|
---|
| 955 | goto exit;
|
---|
| 956 | }
|
---|
| 957 |
|
---|
| 958 | ret = mbedtls_gcm_finish( &ctx, tag_buf, 16 );
|
---|
| 959 | if( ret != 0 )
|
---|
| 960 | goto exit;
|
---|
| 961 |
|
---|
| 962 | if( memcmp( buf, pt[pt_index[i]], pt_len[i] ) != 0 ||
|
---|
| 963 | memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
|
---|
| 964 | {
|
---|
| 965 | ret = 1;
|
---|
| 966 | goto exit;
|
---|
| 967 | }
|
---|
| 968 |
|
---|
| 969 | mbedtls_gcm_free( &ctx );
|
---|
| 970 |
|
---|
| 971 | if( verbose != 0 )
|
---|
| 972 | mbedtls_printf( "passed\n" );
|
---|
| 973 | }
|
---|
| 974 | }
|
---|
| 975 |
|
---|
| 976 | if( verbose != 0 )
|
---|
| 977 | mbedtls_printf( "\n" );
|
---|
| 978 |
|
---|
| 979 | ret = 0;
|
---|
| 980 |
|
---|
| 981 | exit:
|
---|
| 982 | if( ret != 0 )
|
---|
| 983 | {
|
---|
| 984 | if( verbose != 0 )
|
---|
| 985 | mbedtls_printf( "failed\n" );
|
---|
| 986 | mbedtls_gcm_free( &ctx );
|
---|
| 987 | }
|
---|
| 988 |
|
---|
| 989 | return( ret );
|
---|
| 990 | }
|
---|
| 991 |
|
---|
| 992 | #endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
|
---|
| 993 |
|
---|
| 994 | #endif /* MBEDTLS_GCM_C */
|
---|