Greg Steiert / pegasus_dev

Dependents:   blinky_max32630fthr

features/mbedtls/src/gcm.c@0:5c4d7b2438d3, 2016-11-11 (annotated)

Committer:
switches
Date:
Fri Nov 11 20:59:50 2016 +0000
Revision:
0:5c4d7b2438d3
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
switches 0:5c4d7b2438d3 1 /*
switches 0:5c4d7b2438d3 2 * NIST SP800-38D compliant GCM implementation
switches 0:5c4d7b2438d3 3 *
switches 0:5c4d7b2438d3 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
switches 0:5c4d7b2438d3 5 * SPDX-License-Identifier: Apache-2.0
switches 0:5c4d7b2438d3 6 *
switches 0:5c4d7b2438d3 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
switches 0:5c4d7b2438d3 8 * not use this file except in compliance with the License.
switches 0:5c4d7b2438d3 9 * You may obtain a copy of the License at
switches 0:5c4d7b2438d3 10 *
switches 0:5c4d7b2438d3 11 * http://www.apache.org/licenses/LICENSE-2.0
switches 0:5c4d7b2438d3 12 *
switches 0:5c4d7b2438d3 13 * Unless required by applicable law or agreed to in writing, software
switches 0:5c4d7b2438d3 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
switches 0:5c4d7b2438d3 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
switches 0:5c4d7b2438d3 16 * See the License for the specific language governing permissions and
switches 0:5c4d7b2438d3 17 * limitations under the License.
switches 0:5c4d7b2438d3 18 *
switches 0:5c4d7b2438d3 19 * This file is part of mbed TLS (https://tls.mbed.org)
switches 0:5c4d7b2438d3 20 */
switches 0:5c4d7b2438d3 21
switches 0:5c4d7b2438d3 22 /*
switches 0:5c4d7b2438d3 23 * http://csrc.nist.gov/publications/nistpubs/800-38D/SP-800-38D.pdf
switches 0:5c4d7b2438d3 24 *
switches 0:5c4d7b2438d3 25 * See also:
switches 0:5c4d7b2438d3 26 * [MGV] http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/gcm/gcm-revised-spec.pdf
switches 0:5c4d7b2438d3 27 *
switches 0:5c4d7b2438d3 28 * We use the algorithm described as Shoup's method with 4-bit tables in
switches 0:5c4d7b2438d3 29 * [MGV] 4.1, pp. 12-13, to enhance speed without using too much memory.
switches 0:5c4d7b2438d3 30 */
switches 0:5c4d7b2438d3 31
switches 0:5c4d7b2438d3 32 #if !defined(MBEDTLS_CONFIG_FILE)
switches 0:5c4d7b2438d3 33 #include "mbedtls/config.h"
switches 0:5c4d7b2438d3 34 #else
switches 0:5c4d7b2438d3 35 #include MBEDTLS_CONFIG_FILE
switches 0:5c4d7b2438d3 36 #endif
switches 0:5c4d7b2438d3 37
switches 0:5c4d7b2438d3 38 #if defined(MBEDTLS_GCM_C)
switches 0:5c4d7b2438d3 39
switches 0:5c4d7b2438d3 40 #include "mbedtls/gcm.h"
switches 0:5c4d7b2438d3 41
switches 0:5c4d7b2438d3 42 #include <string.h>
switches 0:5c4d7b2438d3 43
switches 0:5c4d7b2438d3 44 #if defined(MBEDTLS_AESNI_C)
switches 0:5c4d7b2438d3 45 #include "mbedtls/aesni.h"
switches 0:5c4d7b2438d3 46 #endif
switches 0:5c4d7b2438d3 47
switches 0:5c4d7b2438d3 48 #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
switches 0:5c4d7b2438d3 49 #if defined(MBEDTLS_PLATFORM_C)
switches 0:5c4d7b2438d3 50 #include "mbedtls/platform.h"
switches 0:5c4d7b2438d3 51 #else
switches 0:5c4d7b2438d3 52 #include <stdio.h>
switches 0:5c4d7b2438d3 53 #define mbedtls_printf printf
switches 0:5c4d7b2438d3 54 #endif /* MBEDTLS_PLATFORM_C */
switches 0:5c4d7b2438d3 55 #endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
switches 0:5c4d7b2438d3 56
switches 0:5c4d7b2438d3 57 /*
switches 0:5c4d7b2438d3 58 * 32-bit integer manipulation macros (big endian)
switches 0:5c4d7b2438d3 59 */
switches 0:5c4d7b2438d3 60 #ifndef GET_UINT32_BE
switches 0:5c4d7b2438d3 61 #define GET_UINT32_BE(n,b,i) \
switches 0:5c4d7b2438d3 62 { \
switches 0:5c4d7b2438d3 63 (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
switches 0:5c4d7b2438d3 64 | ( (uint32_t) (b)[(i) + 1] << 16 ) \
switches 0:5c4d7b2438d3 65 | ( (uint32_t) (b)[(i) + 2] << 8 ) \
switches 0:5c4d7b2438d3 66 | ( (uint32_t) (b)[(i) + 3] ); \
switches 0:5c4d7b2438d3 67 }
switches 0:5c4d7b2438d3 68 #endif
switches 0:5c4d7b2438d3 69
switches 0:5c4d7b2438d3 70 #ifndef PUT_UINT32_BE
switches 0:5c4d7b2438d3 71 #define PUT_UINT32_BE(n,b,i) \
switches 0:5c4d7b2438d3 72 { \
switches 0:5c4d7b2438d3 73 (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
switches 0:5c4d7b2438d3 74 (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
switches 0:5c4d7b2438d3 75 (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
switches 0:5c4d7b2438d3 76 (b)[(i) + 3] = (unsigned char) ( (n) ); \
switches 0:5c4d7b2438d3 77 }
switches 0:5c4d7b2438d3 78 #endif
switches 0:5c4d7b2438d3 79
switches 0:5c4d7b2438d3 80 /* Implementation that should never be optimized out by the compiler */
switches 0:5c4d7b2438d3 81 static void mbedtls_zeroize( void *v, size_t n ) {
switches 0:5c4d7b2438d3 82 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
switches 0:5c4d7b2438d3 83 }
switches 0:5c4d7b2438d3 84
switches 0:5c4d7b2438d3 85 /*
switches 0:5c4d7b2438d3 86 * Initialize a context
switches 0:5c4d7b2438d3 87 */
switches 0:5c4d7b2438d3 88 void mbedtls_gcm_init( mbedtls_gcm_context *ctx )
switches 0:5c4d7b2438d3 89 {
switches 0:5c4d7b2438d3 90 memset( ctx, 0, sizeof( mbedtls_gcm_context ) );
switches 0:5c4d7b2438d3 91 }
switches 0:5c4d7b2438d3 92
switches 0:5c4d7b2438d3 93 /*
switches 0:5c4d7b2438d3 94 * Precompute small multiples of H, that is set
switches 0:5c4d7b2438d3 95 * HH[i] || HL[i] = H times i,
switches 0:5c4d7b2438d3 96 * where i is seen as a field element as in [MGV], ie high-order bits
switches 0:5c4d7b2438d3 97 * correspond to low powers of P. The result is stored in the same way, that
switches 0:5c4d7b2438d3 98 * is the high-order bit of HH corresponds to P^0 and the low-order bit of HL
switches 0:5c4d7b2438d3 99 * corresponds to P^127.
switches 0:5c4d7b2438d3 100 */
switches 0:5c4d7b2438d3 101 static int gcm_gen_table( mbedtls_gcm_context *ctx )
switches 0:5c4d7b2438d3 102 {
switches 0:5c4d7b2438d3 103 int ret, i, j;
switches 0:5c4d7b2438d3 104 uint64_t hi, lo;
switches 0:5c4d7b2438d3 105 uint64_t vl, vh;
switches 0:5c4d7b2438d3 106 unsigned char h[16];
switches 0:5c4d7b2438d3 107 size_t olen = 0;
switches 0:5c4d7b2438d3 108
switches 0:5c4d7b2438d3 109 memset( h, 0, 16 );
switches 0:5c4d7b2438d3 110 if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, h, 16, h, &olen ) ) != 0 )
switches 0:5c4d7b2438d3 111 return( ret );
switches 0:5c4d7b2438d3 112
switches 0:5c4d7b2438d3 113 /* pack h as two 64-bits ints, big-endian */
switches 0:5c4d7b2438d3 114 GET_UINT32_BE( hi, h, 0 );
switches 0:5c4d7b2438d3 115 GET_UINT32_BE( lo, h, 4 );
switches 0:5c4d7b2438d3 116 vh = (uint64_t) hi << 32 | lo;
switches 0:5c4d7b2438d3 117
switches 0:5c4d7b2438d3 118 GET_UINT32_BE( hi, h, 8 );
switches 0:5c4d7b2438d3 119 GET_UINT32_BE( lo, h, 12 );
switches 0:5c4d7b2438d3 120 vl = (uint64_t) hi << 32 | lo;
switches 0:5c4d7b2438d3 121
switches 0:5c4d7b2438d3 122 /* 8 = 1000 corresponds to 1 in GF(2^128) */
switches 0:5c4d7b2438d3 123 ctx->HL[8] = vl;
switches 0:5c4d7b2438d3 124 ctx->HH[8] = vh;
switches 0:5c4d7b2438d3 125
switches 0:5c4d7b2438d3 126 #if defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_HAVE_X86_64)
switches 0:5c4d7b2438d3 127 /* With CLMUL support, we need only h, not the rest of the table */
switches 0:5c4d7b2438d3 128 if( mbedtls_aesni_has_support( MBEDTLS_AESNI_CLMUL ) )
switches 0:5c4d7b2438d3 129 return( 0 );
switches 0:5c4d7b2438d3 130 #endif
switches 0:5c4d7b2438d3 131
switches 0:5c4d7b2438d3 132 /* 0 corresponds to 0 in GF(2^128) */
switches 0:5c4d7b2438d3 133 ctx->HH[0] = 0;
switches 0:5c4d7b2438d3 134 ctx->HL[0] = 0;
switches 0:5c4d7b2438d3 135
switches 0:5c4d7b2438d3 136 for( i = 4; i > 0; i >>= 1 )
switches 0:5c4d7b2438d3 137 {
switches 0:5c4d7b2438d3 138 uint32_t T = ( vl & 1 ) * 0xe1000000U;
switches 0:5c4d7b2438d3 139 vl = ( vh << 63 ) | ( vl >> 1 );
switches 0:5c4d7b2438d3 140 vh = ( vh >> 1 ) ^ ( (uint64_t) T << 32);
switches 0:5c4d7b2438d3 141
switches 0:5c4d7b2438d3 142 ctx->HL[i] = vl;
switches 0:5c4d7b2438d3 143 ctx->HH[i] = vh;
switches 0:5c4d7b2438d3 144 }
switches 0:5c4d7b2438d3 145
switches 0:5c4d7b2438d3 146 for( i = 2; i <= 8; i *= 2 )
switches 0:5c4d7b2438d3 147 {
switches 0:5c4d7b2438d3 148 uint64_t *HiL = ctx->HL + i, *HiH = ctx->HH + i;
switches 0:5c4d7b2438d3 149 vh = *HiH;
switches 0:5c4d7b2438d3 150 vl = *HiL;
switches 0:5c4d7b2438d3 151 for( j = 1; j < i; j++ )
switches 0:5c4d7b2438d3 152 {
switches 0:5c4d7b2438d3 153 HiH[j] = vh ^ ctx->HH[j];
switches 0:5c4d7b2438d3 154 HiL[j] = vl ^ ctx->HL[j];
switches 0:5c4d7b2438d3 155 }
switches 0:5c4d7b2438d3 156 }
switches 0:5c4d7b2438d3 157
switches 0:5c4d7b2438d3 158 return( 0 );
switches 0:5c4d7b2438d3 159 }
switches 0:5c4d7b2438d3 160
switches 0:5c4d7b2438d3 161 int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
switches 0:5c4d7b2438d3 162 mbedtls_cipher_id_t cipher,
switches 0:5c4d7b2438d3 163 const unsigned char *key,
switches 0:5c4d7b2438d3 164 unsigned int keybits )
switches 0:5c4d7b2438d3 165 {
switches 0:5c4d7b2438d3 166 int ret;
switches 0:5c4d7b2438d3 167 const mbedtls_cipher_info_t *cipher_info;
switches 0:5c4d7b2438d3 168
switches 0:5c4d7b2438d3 169 cipher_info = mbedtls_cipher_info_from_values( cipher, keybits, MBEDTLS_MODE_ECB );
switches 0:5c4d7b2438d3 170 if( cipher_info == NULL )
switches 0:5c4d7b2438d3 171 return( MBEDTLS_ERR_GCM_BAD_INPUT );
switches 0:5c4d7b2438d3 172
switches 0:5c4d7b2438d3 173 if( cipher_info->block_size != 16 )
switches 0:5c4d7b2438d3 174 return( MBEDTLS_ERR_GCM_BAD_INPUT );
switches 0:5c4d7b2438d3 175
switches 0:5c4d7b2438d3 176 mbedtls_cipher_free( &ctx->cipher_ctx );
switches 0:5c4d7b2438d3 177
switches 0:5c4d7b2438d3 178 if( ( ret = mbedtls_cipher_setup( &ctx->cipher_ctx, cipher_info ) ) != 0 )
switches 0:5c4d7b2438d3 179 return( ret );
switches 0:5c4d7b2438d3 180
switches 0:5c4d7b2438d3 181 if( ( ret = mbedtls_cipher_setkey( &ctx->cipher_ctx, key, keybits,
switches 0:5c4d7b2438d3 182 MBEDTLS_ENCRYPT ) ) != 0 )
switches 0:5c4d7b2438d3 183 {
switches 0:5c4d7b2438d3 184 return( ret );
switches 0:5c4d7b2438d3 185 }
switches 0:5c4d7b2438d3 186
switches 0:5c4d7b2438d3 187 if( ( ret = gcm_gen_table( ctx ) ) != 0 )
switches 0:5c4d7b2438d3 188 return( ret );
switches 0:5c4d7b2438d3 189
switches 0:5c4d7b2438d3 190 return( 0 );
switches 0:5c4d7b2438d3 191 }
switches 0:5c4d7b2438d3 192
switches 0:5c4d7b2438d3 193 /*
switches 0:5c4d7b2438d3 194 * Shoup's method for multiplication use this table with
switches 0:5c4d7b2438d3 195 * last4[x] = x times P^128
switches 0:5c4d7b2438d3 196 * where x and last4[x] are seen as elements of GF(2^128) as in [MGV]
switches 0:5c4d7b2438d3 197 */
switches 0:5c4d7b2438d3 198 static const uint64_t last4[16] =
switches 0:5c4d7b2438d3 199 {
switches 0:5c4d7b2438d3 200 0x0000, 0x1c20, 0x3840, 0x2460,
switches 0:5c4d7b2438d3 201 0x7080, 0x6ca0, 0x48c0, 0x54e0,
switches 0:5c4d7b2438d3 202 0xe100, 0xfd20, 0xd940, 0xc560,
switches 0:5c4d7b2438d3 203 0x9180, 0x8da0, 0xa9c0, 0xb5e0
switches 0:5c4d7b2438d3 204 };
switches 0:5c4d7b2438d3 205
switches 0:5c4d7b2438d3 206 /*
switches 0:5c4d7b2438d3 207 * Sets output to x times H using the precomputed tables.
switches 0:5c4d7b2438d3 208 * x and output are seen as elements of GF(2^128) as in [MGV].
switches 0:5c4d7b2438d3 209 */
switches 0:5c4d7b2438d3 210 static void gcm_mult( mbedtls_gcm_context *ctx, const unsigned char x[16],
switches 0:5c4d7b2438d3 211 unsigned char output[16] )
switches 0:5c4d7b2438d3 212 {
switches 0:5c4d7b2438d3 213 int i = 0;
switches 0:5c4d7b2438d3 214 unsigned char lo, hi, rem;
switches 0:5c4d7b2438d3 215 uint64_t zh, zl;
switches 0:5c4d7b2438d3 216
switches 0:5c4d7b2438d3 217 #if defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_HAVE_X86_64)
switches 0:5c4d7b2438d3 218 if( mbedtls_aesni_has_support( MBEDTLS_AESNI_CLMUL ) ) {
switches 0:5c4d7b2438d3 219 unsigned char h[16];
switches 0:5c4d7b2438d3 220
switches 0:5c4d7b2438d3 221 PUT_UINT32_BE( ctx->HH[8] >> 32, h, 0 );
switches 0:5c4d7b2438d3 222 PUT_UINT32_BE( ctx->HH[8], h, 4 );
switches 0:5c4d7b2438d3 223 PUT_UINT32_BE( ctx->HL[8] >> 32, h, 8 );
switches 0:5c4d7b2438d3 224 PUT_UINT32_BE( ctx->HL[8], h, 12 );
switches 0:5c4d7b2438d3 225
switches 0:5c4d7b2438d3 226 mbedtls_aesni_gcm_mult( output, x, h );
switches 0:5c4d7b2438d3 227 return;
switches 0:5c4d7b2438d3 228 }
switches 0:5c4d7b2438d3 229 #endif /* MBEDTLS_AESNI_C && MBEDTLS_HAVE_X86_64 */
switches 0:5c4d7b2438d3 230
switches 0:5c4d7b2438d3 231 lo = x[15] & 0xf;
switches 0:5c4d7b2438d3 232
switches 0:5c4d7b2438d3 233 zh = ctx->HH[lo];
switches 0:5c4d7b2438d3 234 zl = ctx->HL[lo];
switches 0:5c4d7b2438d3 235
switches 0:5c4d7b2438d3 236 for( i = 15; i >= 0; i-- )
switches 0:5c4d7b2438d3 237 {
switches 0:5c4d7b2438d3 238 lo = x[i] & 0xf;
switches 0:5c4d7b2438d3 239 hi = x[i] >> 4;
switches 0:5c4d7b2438d3 240
switches 0:5c4d7b2438d3 241 if( i != 15 )
switches 0:5c4d7b2438d3 242 {
switches 0:5c4d7b2438d3 243 rem = (unsigned char) zl & 0xf;
switches 0:5c4d7b2438d3 244 zl = ( zh << 60 ) | ( zl >> 4 );
switches 0:5c4d7b2438d3 245 zh = ( zh >> 4 );
switches 0:5c4d7b2438d3 246 zh ^= (uint64_t) last4[rem] << 48;
switches 0:5c4d7b2438d3 247 zh ^= ctx->HH[lo];
switches 0:5c4d7b2438d3 248 zl ^= ctx->HL[lo];
switches 0:5c4d7b2438d3 249
switches 0:5c4d7b2438d3 250 }
switches 0:5c4d7b2438d3 251
switches 0:5c4d7b2438d3 252 rem = (unsigned char) zl & 0xf;
switches 0:5c4d7b2438d3 253 zl = ( zh << 60 ) | ( zl >> 4 );
switches 0:5c4d7b2438d3 254 zh = ( zh >> 4 );
switches 0:5c4d7b2438d3 255 zh ^= (uint64_t) last4[rem] << 48;
switches 0:5c4d7b2438d3 256 zh ^= ctx->HH[hi];
switches 0:5c4d7b2438d3 257 zl ^= ctx->HL[hi];
switches 0:5c4d7b2438d3 258 }
switches 0:5c4d7b2438d3 259
switches 0:5c4d7b2438d3 260 PUT_UINT32_BE( zh >> 32, output, 0 );
switches 0:5c4d7b2438d3 261 PUT_UINT32_BE( zh, output, 4 );
switches 0:5c4d7b2438d3 262 PUT_UINT32_BE( zl >> 32, output, 8 );
switches 0:5c4d7b2438d3 263 PUT_UINT32_BE( zl, output, 12 );
switches 0:5c4d7b2438d3 264 }
switches 0:5c4d7b2438d3 265
switches 0:5c4d7b2438d3 266 int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
switches 0:5c4d7b2438d3 267 int mode,
switches 0:5c4d7b2438d3 268 const unsigned char *iv,
switches 0:5c4d7b2438d3 269 size_t iv_len,
switches 0:5c4d7b2438d3 270 const unsigned char *add,
switches 0:5c4d7b2438d3 271 size_t add_len )
switches 0:5c4d7b2438d3 272 {
switches 0:5c4d7b2438d3 273 int ret;
switches 0:5c4d7b2438d3 274 unsigned char work_buf[16];
switches 0:5c4d7b2438d3 275 size_t i;
switches 0:5c4d7b2438d3 276 const unsigned char *p;
switches 0:5c4d7b2438d3 277 size_t use_len, olen = 0;
switches 0:5c4d7b2438d3 278
switches 0:5c4d7b2438d3 279 /* IV and AD are limited to 2^64 bits, so 2^61 bytes */
switches 0:5c4d7b2438d3 280 if( ( (uint64_t) iv_len ) >> 61 != 0 ||
switches 0:5c4d7b2438d3 281 ( (uint64_t) add_len ) >> 61 != 0 )
switches 0:5c4d7b2438d3 282 {
switches 0:5c4d7b2438d3 283 return( MBEDTLS_ERR_GCM_BAD_INPUT );
switches 0:5c4d7b2438d3 284 }
switches 0:5c4d7b2438d3 285
switches 0:5c4d7b2438d3 286 memset( ctx->y, 0x00, sizeof(ctx->y) );
switches 0:5c4d7b2438d3 287 memset( ctx->buf, 0x00, sizeof(ctx->buf) );
switches 0:5c4d7b2438d3 288
switches 0:5c4d7b2438d3 289 ctx->mode = mode;
switches 0:5c4d7b2438d3 290 ctx->len = 0;
switches 0:5c4d7b2438d3 291 ctx->add_len = 0;
switches 0:5c4d7b2438d3 292
switches 0:5c4d7b2438d3 293 if( iv_len == 12 )
switches 0:5c4d7b2438d3 294 {
switches 0:5c4d7b2438d3 295 memcpy( ctx->y, iv, iv_len );
switches 0:5c4d7b2438d3 296 ctx->y[15] = 1;
switches 0:5c4d7b2438d3 297 }
switches 0:5c4d7b2438d3 298 else
switches 0:5c4d7b2438d3 299 {
switches 0:5c4d7b2438d3 300 memset( work_buf, 0x00, 16 );
switches 0:5c4d7b2438d3 301 PUT_UINT32_BE( iv_len * 8, work_buf, 12 );
switches 0:5c4d7b2438d3 302
switches 0:5c4d7b2438d3 303 p = iv;
switches 0:5c4d7b2438d3 304 while( iv_len > 0 )
switches 0:5c4d7b2438d3 305 {
switches 0:5c4d7b2438d3 306 use_len = ( iv_len < 16 ) ? iv_len : 16;
switches 0:5c4d7b2438d3 307
switches 0:5c4d7b2438d3 308 for( i = 0; i < use_len; i++ )
switches 0:5c4d7b2438d3 309 ctx->y[i] ^= p[i];
switches 0:5c4d7b2438d3 310
switches 0:5c4d7b2438d3 311 gcm_mult( ctx, ctx->y, ctx->y );
switches 0:5c4d7b2438d3 312
switches 0:5c4d7b2438d3 313 iv_len -= use_len;
switches 0:5c4d7b2438d3 314 p += use_len;
switches 0:5c4d7b2438d3 315 }
switches 0:5c4d7b2438d3 316
switches 0:5c4d7b2438d3 317 for( i = 0; i < 16; i++ )
switches 0:5c4d7b2438d3 318 ctx->y[i] ^= work_buf[i];
switches 0:5c4d7b2438d3 319
switches 0:5c4d7b2438d3 320 gcm_mult( ctx, ctx->y, ctx->y );
switches 0:5c4d7b2438d3 321 }
switches 0:5c4d7b2438d3 322
switches 0:5c4d7b2438d3 323 if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16, ctx->base_ectr,
switches 0:5c4d7b2438d3 324 &olen ) ) != 0 )
switches 0:5c4d7b2438d3 325 {
switches 0:5c4d7b2438d3 326 return( ret );
switches 0:5c4d7b2438d3 327 }
switches 0:5c4d7b2438d3 328
switches 0:5c4d7b2438d3 329 ctx->add_len = add_len;
switches 0:5c4d7b2438d3 330 p = add;
switches 0:5c4d7b2438d3 331 while( add_len > 0 )
switches 0:5c4d7b2438d3 332 {
switches 0:5c4d7b2438d3 333 use_len = ( add_len < 16 ) ? add_len : 16;
switches 0:5c4d7b2438d3 334
switches 0:5c4d7b2438d3 335 for( i = 0; i < use_len; i++ )
switches 0:5c4d7b2438d3 336 ctx->buf[i] ^= p[i];
switches 0:5c4d7b2438d3 337
switches 0:5c4d7b2438d3 338 gcm_mult( ctx, ctx->buf, ctx->buf );
switches 0:5c4d7b2438d3 339
switches 0:5c4d7b2438d3 340 add_len -= use_len;
switches 0:5c4d7b2438d3 341 p += use_len;
switches 0:5c4d7b2438d3 342 }
switches 0:5c4d7b2438d3 343
switches 0:5c4d7b2438d3 344 return( 0 );
switches 0:5c4d7b2438d3 345 }
switches 0:5c4d7b2438d3 346
switches 0:5c4d7b2438d3 347 int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
switches 0:5c4d7b2438d3 348 size_t length,
switches 0:5c4d7b2438d3 349 const unsigned char *input,
switches 0:5c4d7b2438d3 350 unsigned char *output )
switches 0:5c4d7b2438d3 351 {
switches 0:5c4d7b2438d3 352 int ret;
switches 0:5c4d7b2438d3 353 unsigned char ectr[16];
switches 0:5c4d7b2438d3 354 size_t i;
switches 0:5c4d7b2438d3 355 const unsigned char *p;
switches 0:5c4d7b2438d3 356 unsigned char *out_p = output;
switches 0:5c4d7b2438d3 357 size_t use_len, olen = 0;
switches 0:5c4d7b2438d3 358
switches 0:5c4d7b2438d3 359 if( output > input && (size_t) ( output - input ) < length )
switches 0:5c4d7b2438d3 360 return( MBEDTLS_ERR_GCM_BAD_INPUT );
switches 0:5c4d7b2438d3 361
switches 0:5c4d7b2438d3 362 /* Total length is restricted to 2^39 - 256 bits, ie 2^36 - 2^5 bytes
switches 0:5c4d7b2438d3 363 * Also check for possible overflow */
switches 0:5c4d7b2438d3 364 if( ctx->len + length < ctx->len ||
switches 0:5c4d7b2438d3 365 (uint64_t) ctx->len + length > 0xFFFFFFFE0ull )
switches 0:5c4d7b2438d3 366 {
switches 0:5c4d7b2438d3 367 return( MBEDTLS_ERR_GCM_BAD_INPUT );
switches 0:5c4d7b2438d3 368 }
switches 0:5c4d7b2438d3 369
switches 0:5c4d7b2438d3 370 ctx->len += length;
switches 0:5c4d7b2438d3 371
switches 0:5c4d7b2438d3 372 p = input;
switches 0:5c4d7b2438d3 373 while( length > 0 )
switches 0:5c4d7b2438d3 374 {
switches 0:5c4d7b2438d3 375 use_len = ( length < 16 ) ? length : 16;
switches 0:5c4d7b2438d3 376
switches 0:5c4d7b2438d3 377 for( i = 16; i > 12; i-- )
switches 0:5c4d7b2438d3 378 if( ++ctx->y[i - 1] != 0 )
switches 0:5c4d7b2438d3 379 break;
switches 0:5c4d7b2438d3 380
switches 0:5c4d7b2438d3 381 if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16, ectr,
switches 0:5c4d7b2438d3 382 &olen ) ) != 0 )
switches 0:5c4d7b2438d3 383 {
switches 0:5c4d7b2438d3 384 return( ret );
switches 0:5c4d7b2438d3 385 }
switches 0:5c4d7b2438d3 386
switches 0:5c4d7b2438d3 387 for( i = 0; i < use_len; i++ )
switches 0:5c4d7b2438d3 388 {
switches 0:5c4d7b2438d3 389 if( ctx->mode == MBEDTLS_GCM_DECRYPT )
switches 0:5c4d7b2438d3 390 ctx->buf[i] ^= p[i];
switches 0:5c4d7b2438d3 391 out_p[i] = ectr[i] ^ p[i];
switches 0:5c4d7b2438d3 392 if( ctx->mode == MBEDTLS_GCM_ENCRYPT )
switches 0:5c4d7b2438d3 393 ctx->buf[i] ^= out_p[i];
switches 0:5c4d7b2438d3 394 }
switches 0:5c4d7b2438d3 395
switches 0:5c4d7b2438d3 396 gcm_mult( ctx, ctx->buf, ctx->buf );
switches 0:5c4d7b2438d3 397
switches 0:5c4d7b2438d3 398 length -= use_len;
switches 0:5c4d7b2438d3 399 p += use_len;
switches 0:5c4d7b2438d3 400 out_p += use_len;
switches 0:5c4d7b2438d3 401 }
switches 0:5c4d7b2438d3 402
switches 0:5c4d7b2438d3 403 return( 0 );
switches 0:5c4d7b2438d3 404 }
switches 0:5c4d7b2438d3 405
switches 0:5c4d7b2438d3 406 int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
switches 0:5c4d7b2438d3 407 unsigned char *tag,
switches 0:5c4d7b2438d3 408 size_t tag_len )
switches 0:5c4d7b2438d3 409 {
switches 0:5c4d7b2438d3 410 unsigned char work_buf[16];
switches 0:5c4d7b2438d3 411 size_t i;
switches 0:5c4d7b2438d3 412 uint64_t orig_len = ctx->len * 8;
switches 0:5c4d7b2438d3 413 uint64_t orig_add_len = ctx->add_len * 8;
switches 0:5c4d7b2438d3 414
switches 0:5c4d7b2438d3 415 if( tag_len > 16 || tag_len < 4 )
switches 0:5c4d7b2438d3 416 return( MBEDTLS_ERR_GCM_BAD_INPUT );
switches 0:5c4d7b2438d3 417
switches 0:5c4d7b2438d3 418 memcpy( tag, ctx->base_ectr, tag_len );
switches 0:5c4d7b2438d3 419
switches 0:5c4d7b2438d3 420 if( orig_len || orig_add_len )
switches 0:5c4d7b2438d3 421 {
switches 0:5c4d7b2438d3 422 memset( work_buf, 0x00, 16 );
switches 0:5c4d7b2438d3 423
switches 0:5c4d7b2438d3 424 PUT_UINT32_BE( ( orig_add_len >> 32 ), work_buf, 0 );
switches 0:5c4d7b2438d3 425 PUT_UINT32_BE( ( orig_add_len ), work_buf, 4 );
switches 0:5c4d7b2438d3 426 PUT_UINT32_BE( ( orig_len >> 32 ), work_buf, 8 );
switches 0:5c4d7b2438d3 427 PUT_UINT32_BE( ( orig_len ), work_buf, 12 );
switches 0:5c4d7b2438d3 428
switches 0:5c4d7b2438d3 429 for( i = 0; i < 16; i++ )
switches 0:5c4d7b2438d3 430 ctx->buf[i] ^= work_buf[i];
switches 0:5c4d7b2438d3 431
switches 0:5c4d7b2438d3 432 gcm_mult( ctx, ctx->buf, ctx->buf );
switches 0:5c4d7b2438d3 433
switches 0:5c4d7b2438d3 434 for( i = 0; i < tag_len; i++ )
switches 0:5c4d7b2438d3 435 tag[i] ^= ctx->buf[i];
switches 0:5c4d7b2438d3 436 }
switches 0:5c4d7b2438d3 437
switches 0:5c4d7b2438d3 438 return( 0 );
switches 0:5c4d7b2438d3 439 }
switches 0:5c4d7b2438d3 440
switches 0:5c4d7b2438d3 441 int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
switches 0:5c4d7b2438d3 442 int mode,
switches 0:5c4d7b2438d3 443 size_t length,
switches 0:5c4d7b2438d3 444 const unsigned char *iv,
switches 0:5c4d7b2438d3 445 size_t iv_len,
switches 0:5c4d7b2438d3 446 const unsigned char *add,
switches 0:5c4d7b2438d3 447 size_t add_len,
switches 0:5c4d7b2438d3 448 const unsigned char *input,
switches 0:5c4d7b2438d3 449 unsigned char *output,
switches 0:5c4d7b2438d3 450 size_t tag_len,
switches 0:5c4d7b2438d3 451 unsigned char *tag )
switches 0:5c4d7b2438d3 452 {
switches 0:5c4d7b2438d3 453 int ret;
switches 0:5c4d7b2438d3 454
switches 0:5c4d7b2438d3 455 if( ( ret = mbedtls_gcm_starts( ctx, mode, iv, iv_len, add, add_len ) ) != 0 )
switches 0:5c4d7b2438d3 456 return( ret );
switches 0:5c4d7b2438d3 457
switches 0:5c4d7b2438d3 458 if( ( ret = mbedtls_gcm_update( ctx, length, input, output ) ) != 0 )
switches 0:5c4d7b2438d3 459 return( ret );
switches 0:5c4d7b2438d3 460
switches 0:5c4d7b2438d3 461 if( ( ret = mbedtls_gcm_finish( ctx, tag, tag_len ) ) != 0 )
switches 0:5c4d7b2438d3 462 return( ret );
switches 0:5c4d7b2438d3 463
switches 0:5c4d7b2438d3 464 return( 0 );
switches 0:5c4d7b2438d3 465 }
switches 0:5c4d7b2438d3 466
switches 0:5c4d7b2438d3 467 int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
switches 0:5c4d7b2438d3 468 size_t length,
switches 0:5c4d7b2438d3 469 const unsigned char *iv,
switches 0:5c4d7b2438d3 470 size_t iv_len,
switches 0:5c4d7b2438d3 471 const unsigned char *add,
switches 0:5c4d7b2438d3 472 size_t add_len,
switches 0:5c4d7b2438d3 473 const unsigned char *tag,
switches 0:5c4d7b2438d3 474 size_t tag_len,
switches 0:5c4d7b2438d3 475 const unsigned char *input,
switches 0:5c4d7b2438d3 476 unsigned char *output )
switches 0:5c4d7b2438d3 477 {
switches 0:5c4d7b2438d3 478 int ret;
switches 0:5c4d7b2438d3 479 unsigned char check_tag[16];
switches 0:5c4d7b2438d3 480 size_t i;
switches 0:5c4d7b2438d3 481 int diff;
switches 0:5c4d7b2438d3 482
switches 0:5c4d7b2438d3 483 if( ( ret = mbedtls_gcm_crypt_and_tag( ctx, MBEDTLS_GCM_DECRYPT, length,
switches 0:5c4d7b2438d3 484 iv, iv_len, add, add_len,
switches 0:5c4d7b2438d3 485 input, output, tag_len, check_tag ) ) != 0 )
switches 0:5c4d7b2438d3 486 {
switches 0:5c4d7b2438d3 487 return( ret );
switches 0:5c4d7b2438d3 488 }
switches 0:5c4d7b2438d3 489
switches 0:5c4d7b2438d3 490 /* Check tag in "constant-time" */
switches 0:5c4d7b2438d3 491 for( diff = 0, i = 0; i < tag_len; i++ )
switches 0:5c4d7b2438d3 492 diff |= tag[i] ^ check_tag[i];
switches 0:5c4d7b2438d3 493
switches 0:5c4d7b2438d3 494 if( diff != 0 )
switches 0:5c4d7b2438d3 495 {
switches 0:5c4d7b2438d3 496 mbedtls_zeroize( output, length );
switches 0:5c4d7b2438d3 497 return( MBEDTLS_ERR_GCM_AUTH_FAILED );
switches 0:5c4d7b2438d3 498 }
switches 0:5c4d7b2438d3 499
switches 0:5c4d7b2438d3 500 return( 0 );
switches 0:5c4d7b2438d3 501 }
switches 0:5c4d7b2438d3 502
switches 0:5c4d7b2438d3 503 void mbedtls_gcm_free( mbedtls_gcm_context *ctx )
switches 0:5c4d7b2438d3 504 {
switches 0:5c4d7b2438d3 505 mbedtls_cipher_free( &ctx->cipher_ctx );
switches 0:5c4d7b2438d3 506 mbedtls_zeroize( ctx, sizeof( mbedtls_gcm_context ) );
switches 0:5c4d7b2438d3 507 }
switches 0:5c4d7b2438d3 508
switches 0:5c4d7b2438d3 509 #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
switches 0:5c4d7b2438d3 510 /*
switches 0:5c4d7b2438d3 511 * AES-GCM test vectors from:
switches 0:5c4d7b2438d3 512 *
switches 0:5c4d7b2438d3 513 * http://csrc.nist.gov/groups/STM/cavp/documents/mac/gcmtestvectors.zip
switches 0:5c4d7b2438d3 514 */
switches 0:5c4d7b2438d3 515 #define MAX_TESTS 6
switches 0:5c4d7b2438d3 516
switches 0:5c4d7b2438d3 517 static const int key_index[MAX_TESTS] =
switches 0:5c4d7b2438d3 518 { 0, 0, 1, 1, 1, 1 };
switches 0:5c4d7b2438d3 519
switches 0:5c4d7b2438d3 520 static const unsigned char key[MAX_TESTS][32] =
switches 0:5c4d7b2438d3 521 {
switches 0:5c4d7b2438d3 522 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
switches 0:5c4d7b2438d3 523 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
switches 0:5c4d7b2438d3 524 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
switches 0:5c4d7b2438d3 525 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
switches 0:5c4d7b2438d3 526 { 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
switches 0:5c4d7b2438d3 527 0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08,
switches 0:5c4d7b2438d3 528 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
switches 0:5c4d7b2438d3 529 0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08 },
switches 0:5c4d7b2438d3 530 };
switches 0:5c4d7b2438d3 531
switches 0:5c4d7b2438d3 532 static const size_t iv_len[MAX_TESTS] =
switches 0:5c4d7b2438d3 533 { 12, 12, 12, 12, 8, 60 };
switches 0:5c4d7b2438d3 534
switches 0:5c4d7b2438d3 535 static const int iv_index[MAX_TESTS] =
switches 0:5c4d7b2438d3 536 { 0, 0, 1, 1, 1, 2 };
switches 0:5c4d7b2438d3 537
switches 0:5c4d7b2438d3 538 static const unsigned char iv[MAX_TESTS][64] =
switches 0:5c4d7b2438d3 539 {
switches 0:5c4d7b2438d3 540 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
switches 0:5c4d7b2438d3 541 0x00, 0x00, 0x00, 0x00 },
switches 0:5c4d7b2438d3 542 { 0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad,
switches 0:5c4d7b2438d3 543 0xde, 0xca, 0xf8, 0x88 },
switches 0:5c4d7b2438d3 544 { 0x93, 0x13, 0x22, 0x5d, 0xf8, 0x84, 0x06, 0xe5,
switches 0:5c4d7b2438d3 545 0x55, 0x90, 0x9c, 0x5a, 0xff, 0x52, 0x69, 0xaa,
switches 0:5c4d7b2438d3 546 0x6a, 0x7a, 0x95, 0x38, 0x53, 0x4f, 0x7d, 0xa1,
switches 0:5c4d7b2438d3 547 0xe4, 0xc3, 0x03, 0xd2, 0xa3, 0x18, 0xa7, 0x28,
switches 0:5c4d7b2438d3 548 0xc3, 0xc0, 0xc9, 0x51, 0x56, 0x80, 0x95, 0x39,
switches 0:5c4d7b2438d3 549 0xfc, 0xf0, 0xe2, 0x42, 0x9a, 0x6b, 0x52, 0x54,
switches 0:5c4d7b2438d3 550 0x16, 0xae, 0xdb, 0xf5, 0xa0, 0xde, 0x6a, 0x57,
switches 0:5c4d7b2438d3 551 0xa6, 0x37, 0xb3, 0x9b },
switches 0:5c4d7b2438d3 552 };
switches 0:5c4d7b2438d3 553
switches 0:5c4d7b2438d3 554 static const size_t add_len[MAX_TESTS] =
switches 0:5c4d7b2438d3 555 { 0, 0, 0, 20, 20, 20 };
switches 0:5c4d7b2438d3 556
switches 0:5c4d7b2438d3 557 static const int add_index[MAX_TESTS] =
switches 0:5c4d7b2438d3 558 { 0, 0, 0, 1, 1, 1 };
switches 0:5c4d7b2438d3 559
switches 0:5c4d7b2438d3 560 static const unsigned char additional[MAX_TESTS][64] =
switches 0:5c4d7b2438d3 561 {
switches 0:5c4d7b2438d3 562 { 0x00 },
switches 0:5c4d7b2438d3 563 { 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
switches 0:5c4d7b2438d3 564 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
switches 0:5c4d7b2438d3 565 0xab, 0xad, 0xda, 0xd2 },
switches 0:5c4d7b2438d3 566 };
switches 0:5c4d7b2438d3 567
switches 0:5c4d7b2438d3 568 static const size_t pt_len[MAX_TESTS] =
switches 0:5c4d7b2438d3 569 { 0, 16, 64, 60, 60, 60 };
switches 0:5c4d7b2438d3 570
switches 0:5c4d7b2438d3 571 static const int pt_index[MAX_TESTS] =
switches 0:5c4d7b2438d3 572 { 0, 0, 1, 1, 1, 1 };
switches 0:5c4d7b2438d3 573
switches 0:5c4d7b2438d3 574 static const unsigned char pt[MAX_TESTS][64] =
switches 0:5c4d7b2438d3 575 {
switches 0:5c4d7b2438d3 576 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
switches 0:5c4d7b2438d3 577 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
switches 0:5c4d7b2438d3 578 { 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
switches 0:5c4d7b2438d3 579 0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
switches 0:5c4d7b2438d3 580 0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
switches 0:5c4d7b2438d3 581 0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
switches 0:5c4d7b2438d3 582 0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
switches 0:5c4d7b2438d3 583 0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
switches 0:5c4d7b2438d3 584 0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
switches 0:5c4d7b2438d3 585 0xba, 0x63, 0x7b, 0x39, 0x1a, 0xaf, 0xd2, 0x55 },
switches 0:5c4d7b2438d3 586 };
switches 0:5c4d7b2438d3 587
switches 0:5c4d7b2438d3 588 static const unsigned char ct[MAX_TESTS * 3][64] =
switches 0:5c4d7b2438d3 589 {
switches 0:5c4d7b2438d3 590 { 0x00 },
switches 0:5c4d7b2438d3 591 { 0x03, 0x88, 0xda, 0xce, 0x60, 0xb6, 0xa3, 0x92,
switches 0:5c4d7b2438d3 592 0xf3, 0x28, 0xc2, 0xb9, 0x71, 0xb2, 0xfe, 0x78 },
switches 0:5c4d7b2438d3 593 { 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
switches 0:5c4d7b2438d3 594 0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
switches 0:5c4d7b2438d3 595 0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
switches 0:5c4d7b2438d3 596 0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
switches 0:5c4d7b2438d3 597 0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
switches 0:5c4d7b2438d3 598 0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
switches 0:5c4d7b2438d3 599 0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
switches 0:5c4d7b2438d3 600 0x3d, 0x58, 0xe0, 0x91, 0x47, 0x3f, 0x59, 0x85 },
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switches 0:5c4d7b2438d3 633 0xac, 0x61, 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47,
switches 0:5c4d7b2438d3 634 0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9,
switches 0:5c4d7b2438d3 635 0xcc, 0xda, 0x27, 0x10, 0xac, 0xad, 0xe2, 0x56 },
switches 0:5c4d7b2438d3 636 { 0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41,
switches 0:5c4d7b2438d3 637 0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, 0x27, 0x57,
switches 0:5c4d7b2438d3 638 0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84,
switches 0:5c4d7b2438d3 639 0x62, 0x85, 0x93, 0xb4, 0x0c, 0xa1, 0xe1, 0x9c,
switches 0:5c4d7b2438d3 640 0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25,
switches 0:5c4d7b2438d3 641 0xac, 0x61, 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47,
switches 0:5c4d7b2438d3 642 0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9,
switches 0:5c4d7b2438d3 643 0xcc, 0xda, 0x27, 0x10 },
switches 0:5c4d7b2438d3 644 { 0x0f, 0x10, 0xf5, 0x99, 0xae, 0x14, 0xa1, 0x54,
switches 0:5c4d7b2438d3 645 0xed, 0x24, 0xb3, 0x6e, 0x25, 0x32, 0x4d, 0xb8,
switches 0:5c4d7b2438d3 646 0xc5, 0x66, 0x63, 0x2e, 0xf2, 0xbb, 0xb3, 0x4f,
switches 0:5c4d7b2438d3 647 0x83, 0x47, 0x28, 0x0f, 0xc4, 0x50, 0x70, 0x57,
switches 0:5c4d7b2438d3 648 0xfd, 0xdc, 0x29, 0xdf, 0x9a, 0x47, 0x1f, 0x75,
switches 0:5c4d7b2438d3 649 0xc6, 0x65, 0x41, 0xd4, 0xd4, 0xda, 0xd1, 0xc9,
switches 0:5c4d7b2438d3 650 0xe9, 0x3a, 0x19, 0xa5, 0x8e, 0x8b, 0x47, 0x3f,
switches 0:5c4d7b2438d3 651 0xa0, 0xf0, 0x62, 0xf7 },
switches 0:5c4d7b2438d3 652 { 0xd2, 0x7e, 0x88, 0x68, 0x1c, 0xe3, 0x24, 0x3c,
switches 0:5c4d7b2438d3 653 0x48, 0x30, 0x16, 0x5a, 0x8f, 0xdc, 0xf9, 0xff,
switches 0:5c4d7b2438d3 654 0x1d, 0xe9, 0xa1, 0xd8, 0xe6, 0xb4, 0x47, 0xef,
switches 0:5c4d7b2438d3 655 0x6e, 0xf7, 0xb7, 0x98, 0x28, 0x66, 0x6e, 0x45,
switches 0:5c4d7b2438d3 656 0x81, 0xe7, 0x90, 0x12, 0xaf, 0x34, 0xdd, 0xd9,
switches 0:5c4d7b2438d3 657 0xe2, 0xf0, 0x37, 0x58, 0x9b, 0x29, 0x2d, 0xb3,
switches 0:5c4d7b2438d3 658 0xe6, 0x7c, 0x03, 0x67, 0x45, 0xfa, 0x22, 0xe7,
switches 0:5c4d7b2438d3 659 0xe9, 0xb7, 0x37, 0x3b },
switches 0:5c4d7b2438d3 660 { 0x00 },
switches 0:5c4d7b2438d3 661 { 0xce, 0xa7, 0x40, 0x3d, 0x4d, 0x60, 0x6b, 0x6e,
switches 0:5c4d7b2438d3 662 0x07, 0x4e, 0xc5, 0xd3, 0xba, 0xf3, 0x9d, 0x18 },
switches 0:5c4d7b2438d3 663 { 0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07,
switches 0:5c4d7b2438d3 664 0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, 0x42, 0x7d,
switches 0:5c4d7b2438d3 665 0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9,
switches 0:5c4d7b2438d3 666 0x75, 0x98, 0xa2, 0xbd, 0x25, 0x55, 0xd1, 0xaa,
switches 0:5c4d7b2438d3 667 0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d,
switches 0:5c4d7b2438d3 668 0xa7, 0xb0, 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38,
switches 0:5c4d7b2438d3 669 0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a,
switches 0:5c4d7b2438d3 670 0xbc, 0xc9, 0xf6, 0x62, 0x89, 0x80, 0x15, 0xad },
switches 0:5c4d7b2438d3 671 { 0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07,
switches 0:5c4d7b2438d3 672 0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, 0x42, 0x7d,
switches 0:5c4d7b2438d3 673 0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9,
switches 0:5c4d7b2438d3 674 0x75, 0x98, 0xa2, 0xbd, 0x25, 0x55, 0xd1, 0xaa,
switches 0:5c4d7b2438d3 675 0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d,
switches 0:5c4d7b2438d3 676 0xa7, 0xb0, 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38,
switches 0:5c4d7b2438d3 677 0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a,
switches 0:5c4d7b2438d3 678 0xbc, 0xc9, 0xf6, 0x62 },
switches 0:5c4d7b2438d3 679 { 0xc3, 0x76, 0x2d, 0xf1, 0xca, 0x78, 0x7d, 0x32,
switches 0:5c4d7b2438d3 680 0xae, 0x47, 0xc1, 0x3b, 0xf1, 0x98, 0x44, 0xcb,
switches 0:5c4d7b2438d3 681 0xaf, 0x1a, 0xe1, 0x4d, 0x0b, 0x97, 0x6a, 0xfa,
switches 0:5c4d7b2438d3 682 0xc5, 0x2f, 0xf7, 0xd7, 0x9b, 0xba, 0x9d, 0xe0,
switches 0:5c4d7b2438d3 683 0xfe, 0xb5, 0x82, 0xd3, 0x39, 0x34, 0xa4, 0xf0,
switches 0:5c4d7b2438d3 684 0x95, 0x4c, 0xc2, 0x36, 0x3b, 0xc7, 0x3f, 0x78,
switches 0:5c4d7b2438d3 685 0x62, 0xac, 0x43, 0x0e, 0x64, 0xab, 0xe4, 0x99,
switches 0:5c4d7b2438d3 686 0xf4, 0x7c, 0x9b, 0x1f },
switches 0:5c4d7b2438d3 687 { 0x5a, 0x8d, 0xef, 0x2f, 0x0c, 0x9e, 0x53, 0xf1,
switches 0:5c4d7b2438d3 688 0xf7, 0x5d, 0x78, 0x53, 0x65, 0x9e, 0x2a, 0x20,
switches 0:5c4d7b2438d3 689 0xee, 0xb2, 0xb2, 0x2a, 0xaf, 0xde, 0x64, 0x19,
switches 0:5c4d7b2438d3 690 0xa0, 0x58, 0xab, 0x4f, 0x6f, 0x74, 0x6b, 0xf4,
switches 0:5c4d7b2438d3 691 0x0f, 0xc0, 0xc3, 0xb7, 0x80, 0xf2, 0x44, 0x45,
switches 0:5c4d7b2438d3 692 0x2d, 0xa3, 0xeb, 0xf1, 0xc5, 0xd8, 0x2c, 0xde,
switches 0:5c4d7b2438d3 693 0xa2, 0x41, 0x89, 0x97, 0x20, 0x0e, 0xf8, 0x2e,
switches 0:5c4d7b2438d3 694 0x44, 0xae, 0x7e, 0x3f },
switches 0:5c4d7b2438d3 695 };
switches 0:5c4d7b2438d3 696
switches 0:5c4d7b2438d3 697 static const unsigned char tag[MAX_TESTS * 3][16] =
switches 0:5c4d7b2438d3 698 {
switches 0:5c4d7b2438d3 699 { 0x58, 0xe2, 0xfc, 0xce, 0xfa, 0x7e, 0x30, 0x61,
switches 0:5c4d7b2438d3 700 0x36, 0x7f, 0x1d, 0x57, 0xa4, 0xe7, 0x45, 0x5a },
switches 0:5c4d7b2438d3 701 { 0xab, 0x6e, 0x47, 0xd4, 0x2c, 0xec, 0x13, 0xbd,
switches 0:5c4d7b2438d3 702 0xf5, 0x3a, 0x67, 0xb2, 0x12, 0x57, 0xbd, 0xdf },
switches 0:5c4d7b2438d3 703 { 0x4d, 0x5c, 0x2a, 0xf3, 0x27, 0xcd, 0x64, 0xa6,
switches 0:5c4d7b2438d3 704 0x2c, 0xf3, 0x5a, 0xbd, 0x2b, 0xa6, 0xfa, 0xb4 },
switches 0:5c4d7b2438d3 705 { 0x5b, 0xc9, 0x4f, 0xbc, 0x32, 0x21, 0xa5, 0xdb,
switches 0:5c4d7b2438d3 706 0x94, 0xfa, 0xe9, 0x5a, 0xe7, 0x12, 0x1a, 0x47 },
switches 0:5c4d7b2438d3 707 { 0x36, 0x12, 0xd2, 0xe7, 0x9e, 0x3b, 0x07, 0x85,
switches 0:5c4d7b2438d3 708 0x56, 0x1b, 0xe1, 0x4a, 0xac, 0xa2, 0xfc, 0xcb },
switches 0:5c4d7b2438d3 709 { 0x61, 0x9c, 0xc5, 0xae, 0xff, 0xfe, 0x0b, 0xfa,
switches 0:5c4d7b2438d3 710 0x46, 0x2a, 0xf4, 0x3c, 0x16, 0x99, 0xd0, 0x50 },
switches 0:5c4d7b2438d3 711 { 0xcd, 0x33, 0xb2, 0x8a, 0xc7, 0x73, 0xf7, 0x4b,
switches 0:5c4d7b2438d3 712 0xa0, 0x0e, 0xd1, 0xf3, 0x12, 0x57, 0x24, 0x35 },
switches 0:5c4d7b2438d3 713 { 0x2f, 0xf5, 0x8d, 0x80, 0x03, 0x39, 0x27, 0xab,
switches 0:5c4d7b2438d3 714 0x8e, 0xf4, 0xd4, 0x58, 0x75, 0x14, 0xf0, 0xfb },
switches 0:5c4d7b2438d3 715 { 0x99, 0x24, 0xa7, 0xc8, 0x58, 0x73, 0x36, 0xbf,
switches 0:5c4d7b2438d3 716 0xb1, 0x18, 0x02, 0x4d, 0xb8, 0x67, 0x4a, 0x14 },
switches 0:5c4d7b2438d3 717 { 0x25, 0x19, 0x49, 0x8e, 0x80, 0xf1, 0x47, 0x8f,
switches 0:5c4d7b2438d3 718 0x37, 0xba, 0x55, 0xbd, 0x6d, 0x27, 0x61, 0x8c },
switches 0:5c4d7b2438d3 719 { 0x65, 0xdc, 0xc5, 0x7f, 0xcf, 0x62, 0x3a, 0x24,
switches 0:5c4d7b2438d3 720 0x09, 0x4f, 0xcc, 0xa4, 0x0d, 0x35, 0x33, 0xf8 },
switches 0:5c4d7b2438d3 721 { 0xdc, 0xf5, 0x66, 0xff, 0x29, 0x1c, 0x25, 0xbb,
switches 0:5c4d7b2438d3 722 0xb8, 0x56, 0x8f, 0xc3, 0xd3, 0x76, 0xa6, 0xd9 },
switches 0:5c4d7b2438d3 723 { 0x53, 0x0f, 0x8a, 0xfb, 0xc7, 0x45, 0x36, 0xb9,
switches 0:5c4d7b2438d3 724 0xa9, 0x63, 0xb4, 0xf1, 0xc4, 0xcb, 0x73, 0x8b },
switches 0:5c4d7b2438d3 725 { 0xd0, 0xd1, 0xc8, 0xa7, 0x99, 0x99, 0x6b, 0xf0,
switches 0:5c4d7b2438d3 726 0x26, 0x5b, 0x98, 0xb5, 0xd4, 0x8a, 0xb9, 0x19 },
switches 0:5c4d7b2438d3 727 { 0xb0, 0x94, 0xda, 0xc5, 0xd9, 0x34, 0x71, 0xbd,
switches 0:5c4d7b2438d3 728 0xec, 0x1a, 0x50, 0x22, 0x70, 0xe3, 0xcc, 0x6c },
switches 0:5c4d7b2438d3 729 { 0x76, 0xfc, 0x6e, 0xce, 0x0f, 0x4e, 0x17, 0x68,
switches 0:5c4d7b2438d3 730 0xcd, 0xdf, 0x88, 0x53, 0xbb, 0x2d, 0x55, 0x1b },
switches 0:5c4d7b2438d3 731 { 0x3a, 0x33, 0x7d, 0xbf, 0x46, 0xa7, 0x92, 0xc4,
switches 0:5c4d7b2438d3 732 0x5e, 0x45, 0x49, 0x13, 0xfe, 0x2e, 0xa8, 0xf2 },
switches 0:5c4d7b2438d3 733 { 0xa4, 0x4a, 0x82, 0x66, 0xee, 0x1c, 0x8e, 0xb0,
switches 0:5c4d7b2438d3 734 0xc8, 0xb5, 0xd4, 0xcf, 0x5a, 0xe9, 0xf1, 0x9a },
switches 0:5c4d7b2438d3 735 };
switches 0:5c4d7b2438d3 736
switches 0:5c4d7b2438d3 737 int mbedtls_gcm_self_test( int verbose )
switches 0:5c4d7b2438d3 738 {
switches 0:5c4d7b2438d3 739 mbedtls_gcm_context ctx;
switches 0:5c4d7b2438d3 740 unsigned char buf[64];
switches 0:5c4d7b2438d3 741 unsigned char tag_buf[16];
switches 0:5c4d7b2438d3 742 int i, j, ret;
switches 0:5c4d7b2438d3 743 mbedtls_cipher_id_t cipher = MBEDTLS_CIPHER_ID_AES;
switches 0:5c4d7b2438d3 744
switches 0:5c4d7b2438d3 745 mbedtls_gcm_init( &ctx );
switches 0:5c4d7b2438d3 746
switches 0:5c4d7b2438d3 747 for( j = 0; j < 3; j++ )
switches 0:5c4d7b2438d3 748 {
switches 0:5c4d7b2438d3 749 int key_len = 128 + 64 * j;
switches 0:5c4d7b2438d3 750
switches 0:5c4d7b2438d3 751 for( i = 0; i < MAX_TESTS; i++ )
switches 0:5c4d7b2438d3 752 {
switches 0:5c4d7b2438d3 753 if( verbose != 0 )
switches 0:5c4d7b2438d3 754 mbedtls_printf( " AES-GCM-%3d #%d (%s): ",
switches 0:5c4d7b2438d3 755 key_len, i, "enc" );
switches 0:5c4d7b2438d3 756
switches 0:5c4d7b2438d3 757 mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
switches 0:5c4d7b2438d3 758
switches 0:5c4d7b2438d3 759 ret = mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_ENCRYPT,
switches 0:5c4d7b2438d3 760 pt_len[i],
switches 0:5c4d7b2438d3 761 iv[iv_index[i]], iv_len[i],
switches 0:5c4d7b2438d3 762 additional[add_index[i]], add_len[i],
switches 0:5c4d7b2438d3 763 pt[pt_index[i]], buf, 16, tag_buf );
switches 0:5c4d7b2438d3 764
switches 0:5c4d7b2438d3 765 if( ret != 0 ||
switches 0:5c4d7b2438d3 766 memcmp( buf, ct[j * 6 + i], pt_len[i] ) != 0 ||
switches 0:5c4d7b2438d3 767 memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
switches 0:5c4d7b2438d3 768 {
switches 0:5c4d7b2438d3 769 if( verbose != 0 )
switches 0:5c4d7b2438d3 770 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 771
switches 0:5c4d7b2438d3 772 return( 1 );
switches 0:5c4d7b2438d3 773 }
switches 0:5c4d7b2438d3 774
switches 0:5c4d7b2438d3 775 mbedtls_gcm_free( &ctx );
switches 0:5c4d7b2438d3 776
switches 0:5c4d7b2438d3 777 if( verbose != 0 )
switches 0:5c4d7b2438d3 778 mbedtls_printf( "passed\n" );
switches 0:5c4d7b2438d3 779
switches 0:5c4d7b2438d3 780 if( verbose != 0 )
switches 0:5c4d7b2438d3 781 mbedtls_printf( " AES-GCM-%3d #%d (%s): ",
switches 0:5c4d7b2438d3 782 key_len, i, "dec" );
switches 0:5c4d7b2438d3 783
switches 0:5c4d7b2438d3 784 mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
switches 0:5c4d7b2438d3 785
switches 0:5c4d7b2438d3 786 ret = mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_DECRYPT,
switches 0:5c4d7b2438d3 787 pt_len[i],
switches 0:5c4d7b2438d3 788 iv[iv_index[i]], iv_len[i],
switches 0:5c4d7b2438d3 789 additional[add_index[i]], add_len[i],
switches 0:5c4d7b2438d3 790 ct[j * 6 + i], buf, 16, tag_buf );
switches 0:5c4d7b2438d3 791
switches 0:5c4d7b2438d3 792 if( ret != 0 ||
switches 0:5c4d7b2438d3 793 memcmp( buf, pt[pt_index[i]], pt_len[i] ) != 0 ||
switches 0:5c4d7b2438d3 794 memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
switches 0:5c4d7b2438d3 795 {
switches 0:5c4d7b2438d3 796 if( verbose != 0 )
switches 0:5c4d7b2438d3 797 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 798
switches 0:5c4d7b2438d3 799 return( 1 );
switches 0:5c4d7b2438d3 800 }
switches 0:5c4d7b2438d3 801
switches 0:5c4d7b2438d3 802 mbedtls_gcm_free( &ctx );
switches 0:5c4d7b2438d3 803
switches 0:5c4d7b2438d3 804 if( verbose != 0 )
switches 0:5c4d7b2438d3 805 mbedtls_printf( "passed\n" );
switches 0:5c4d7b2438d3 806
switches 0:5c4d7b2438d3 807 if( verbose != 0 )
switches 0:5c4d7b2438d3 808 mbedtls_printf( " AES-GCM-%3d #%d split (%s): ",
switches 0:5c4d7b2438d3 809 key_len, i, "enc" );
switches 0:5c4d7b2438d3 810
switches 0:5c4d7b2438d3 811 mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
switches 0:5c4d7b2438d3 812
switches 0:5c4d7b2438d3 813 ret = mbedtls_gcm_starts( &ctx, MBEDTLS_GCM_ENCRYPT,
switches 0:5c4d7b2438d3 814 iv[iv_index[i]], iv_len[i],
switches 0:5c4d7b2438d3 815 additional[add_index[i]], add_len[i] );
switches 0:5c4d7b2438d3 816 if( ret != 0 )
switches 0:5c4d7b2438d3 817 {
switches 0:5c4d7b2438d3 818 if( verbose != 0 )
switches 0:5c4d7b2438d3 819 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 820
switches 0:5c4d7b2438d3 821 return( 1 );
switches 0:5c4d7b2438d3 822 }
switches 0:5c4d7b2438d3 823
switches 0:5c4d7b2438d3 824 if( pt_len[i] > 32 )
switches 0:5c4d7b2438d3 825 {
switches 0:5c4d7b2438d3 826 size_t rest_len = pt_len[i] - 32;
switches 0:5c4d7b2438d3 827 ret = mbedtls_gcm_update( &ctx, 32, pt[pt_index[i]], buf );
switches 0:5c4d7b2438d3 828 if( ret != 0 )
switches 0:5c4d7b2438d3 829 {
switches 0:5c4d7b2438d3 830 if( verbose != 0 )
switches 0:5c4d7b2438d3 831 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 832
switches 0:5c4d7b2438d3 833 return( 1 );
switches 0:5c4d7b2438d3 834 }
switches 0:5c4d7b2438d3 835
switches 0:5c4d7b2438d3 836 ret = mbedtls_gcm_update( &ctx, rest_len, pt[pt_index[i]] + 32,
switches 0:5c4d7b2438d3 837 buf + 32 );
switches 0:5c4d7b2438d3 838 if( ret != 0 )
switches 0:5c4d7b2438d3 839 {
switches 0:5c4d7b2438d3 840 if( verbose != 0 )
switches 0:5c4d7b2438d3 841 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 842
switches 0:5c4d7b2438d3 843 return( 1 );
switches 0:5c4d7b2438d3 844 }
switches 0:5c4d7b2438d3 845 }
switches 0:5c4d7b2438d3 846 else
switches 0:5c4d7b2438d3 847 {
switches 0:5c4d7b2438d3 848 ret = mbedtls_gcm_update( &ctx, pt_len[i], pt[pt_index[i]], buf );
switches 0:5c4d7b2438d3 849 if( ret != 0 )
switches 0:5c4d7b2438d3 850 {
switches 0:5c4d7b2438d3 851 if( verbose != 0 )
switches 0:5c4d7b2438d3 852 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 853
switches 0:5c4d7b2438d3 854 return( 1 );
switches 0:5c4d7b2438d3 855 }
switches 0:5c4d7b2438d3 856 }
switches 0:5c4d7b2438d3 857
switches 0:5c4d7b2438d3 858 ret = mbedtls_gcm_finish( &ctx, tag_buf, 16 );
switches 0:5c4d7b2438d3 859 if( ret != 0 ||
switches 0:5c4d7b2438d3 860 memcmp( buf, ct[j * 6 + i], pt_len[i] ) != 0 ||
switches 0:5c4d7b2438d3 861 memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
switches 0:5c4d7b2438d3 862 {
switches 0:5c4d7b2438d3 863 if( verbose != 0 )
switches 0:5c4d7b2438d3 864 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 865
switches 0:5c4d7b2438d3 866 return( 1 );
switches 0:5c4d7b2438d3 867 }
switches 0:5c4d7b2438d3 868
switches 0:5c4d7b2438d3 869 mbedtls_gcm_free( &ctx );
switches 0:5c4d7b2438d3 870
switches 0:5c4d7b2438d3 871 if( verbose != 0 )
switches 0:5c4d7b2438d3 872 mbedtls_printf( "passed\n" );
switches 0:5c4d7b2438d3 873
switches 0:5c4d7b2438d3 874 if( verbose != 0 )
switches 0:5c4d7b2438d3 875 mbedtls_printf( " AES-GCM-%3d #%d split (%s): ",
switches 0:5c4d7b2438d3 876 key_len, i, "dec" );
switches 0:5c4d7b2438d3 877
switches 0:5c4d7b2438d3 878 mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
switches 0:5c4d7b2438d3 879
switches 0:5c4d7b2438d3 880 ret = mbedtls_gcm_starts( &ctx, MBEDTLS_GCM_DECRYPT,
switches 0:5c4d7b2438d3 881 iv[iv_index[i]], iv_len[i],
switches 0:5c4d7b2438d3 882 additional[add_index[i]], add_len[i] );
switches 0:5c4d7b2438d3 883 if( ret != 0 )
switches 0:5c4d7b2438d3 884 {
switches 0:5c4d7b2438d3 885 if( verbose != 0 )
switches 0:5c4d7b2438d3 886 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 887
switches 0:5c4d7b2438d3 888 return( 1 );
switches 0:5c4d7b2438d3 889 }
switches 0:5c4d7b2438d3 890
switches 0:5c4d7b2438d3 891 if( pt_len[i] > 32 )
switches 0:5c4d7b2438d3 892 {
switches 0:5c4d7b2438d3 893 size_t rest_len = pt_len[i] - 32;
switches 0:5c4d7b2438d3 894 ret = mbedtls_gcm_update( &ctx, 32, ct[j * 6 + i], buf );
switches 0:5c4d7b2438d3 895 if( ret != 0 )
switches 0:5c4d7b2438d3 896 {
switches 0:5c4d7b2438d3 897 if( verbose != 0 )
switches 0:5c4d7b2438d3 898 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 899
switches 0:5c4d7b2438d3 900 return( 1 );
switches 0:5c4d7b2438d3 901 }
switches 0:5c4d7b2438d3 902
switches 0:5c4d7b2438d3 903 ret = mbedtls_gcm_update( &ctx, rest_len, ct[j * 6 + i] + 32,
switches 0:5c4d7b2438d3 904 buf + 32 );
switches 0:5c4d7b2438d3 905 if( ret != 0 )
switches 0:5c4d7b2438d3 906 {
switches 0:5c4d7b2438d3 907 if( verbose != 0 )
switches 0:5c4d7b2438d3 908 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 909
switches 0:5c4d7b2438d3 910 return( 1 );
switches 0:5c4d7b2438d3 911 }
switches 0:5c4d7b2438d3 912 }
switches 0:5c4d7b2438d3 913 else
switches 0:5c4d7b2438d3 914 {
switches 0:5c4d7b2438d3 915 ret = mbedtls_gcm_update( &ctx, pt_len[i], ct[j * 6 + i], buf );
switches 0:5c4d7b2438d3 916 if( ret != 0 )
switches 0:5c4d7b2438d3 917 {
switches 0:5c4d7b2438d3 918 if( verbose != 0 )
switches 0:5c4d7b2438d3 919 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 920
switches 0:5c4d7b2438d3 921 return( 1 );
switches 0:5c4d7b2438d3 922 }
switches 0:5c4d7b2438d3 923 }
switches 0:5c4d7b2438d3 924
switches 0:5c4d7b2438d3 925 ret = mbedtls_gcm_finish( &ctx, tag_buf, 16 );
switches 0:5c4d7b2438d3 926 if( ret != 0 ||
switches 0:5c4d7b2438d3 927 memcmp( buf, pt[pt_index[i]], pt_len[i] ) != 0 ||
switches 0:5c4d7b2438d3 928 memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
switches 0:5c4d7b2438d3 929 {
switches 0:5c4d7b2438d3 930 if( verbose != 0 )
switches 0:5c4d7b2438d3 931 mbedtls_printf( "failed\n" );
switches 0:5c4d7b2438d3 932
switches 0:5c4d7b2438d3 933 return( 1 );
switches 0:5c4d7b2438d3 934 }
switches 0:5c4d7b2438d3 935
switches 0:5c4d7b2438d3 936 mbedtls_gcm_free( &ctx );
switches 0:5c4d7b2438d3 937
switches 0:5c4d7b2438d3 938 if( verbose != 0 )
switches 0:5c4d7b2438d3 939 mbedtls_printf( "passed\n" );
switches 0:5c4d7b2438d3 940
switches 0:5c4d7b2438d3 941 }
switches 0:5c4d7b2438d3 942 }
switches 0:5c4d7b2438d3 943
switches 0:5c4d7b2438d3 944 if( verbose != 0 )
switches 0:5c4d7b2438d3 945 mbedtls_printf( "\n" );
switches 0:5c4d7b2438d3 946
switches 0:5c4d7b2438d3 947 return( 0 );
switches 0:5c4d7b2438d3 948 }
switches 0:5c4d7b2438d3 949
switches 0:5c4d7b2438d3 950 #endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
switches 0:5c4d7b2438d3 951
switches 0:5c4d7b2438d3 952 #endif /* MBEDTLS_GCM_C */