Willie Solano / mbedtls-slave-prot-prod

mbed TLS Build

Dependents:   Slave-prot-prod

library/gcm.c@0:cdf462088d13, 2017-01-05 (annotated)

Committer:
markrad
Date:
Thu Jan 05 00:18:44 2017 +0000
Revision:
0:cdf462088d13
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
markrad 0:cdf462088d13 1 /*
markrad 0:cdf462088d13 2 * NIST SP800-38D compliant GCM implementation
markrad 0:cdf462088d13 3 *
markrad 0:cdf462088d13 4 * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
markrad 0:cdf462088d13 5 * SPDX-License-Identifier: Apache-2.0
markrad 0:cdf462088d13 6 *
markrad 0:cdf462088d13 7 * Licensed under the Apache License, Version 2.0 (the "License"); you may
markrad 0:cdf462088d13 8 * not use this file except in compliance with the License.
markrad 0:cdf462088d13 9 * You may obtain a copy of the License at
markrad 0:cdf462088d13 10 *
markrad 0:cdf462088d13 11 * http://www.apache.org/licenses/LICENSE-2.0
markrad 0:cdf462088d13 12 *
markrad 0:cdf462088d13 13 * Unless required by applicable law or agreed to in writing, software
markrad 0:cdf462088d13 14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
markrad 0:cdf462088d13 15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
markrad 0:cdf462088d13 16 * See the License for the specific language governing permissions and
markrad 0:cdf462088d13 17 * limitations under the License.
markrad 0:cdf462088d13 18 *
markrad 0:cdf462088d13 19 * This file is part of mbed TLS (https://tls.mbed.org)
markrad 0:cdf462088d13 20 */
markrad 0:cdf462088d13 21
markrad 0:cdf462088d13 22 /*
markrad 0:cdf462088d13 23 * http://csrc.nist.gov/publications/nistpubs/800-38D/SP-800-38D.pdf
markrad 0:cdf462088d13 24 *
markrad 0:cdf462088d13 25 * See also:
markrad 0:cdf462088d13 26 * [MGV] http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/gcm/gcm-revised-spec.pdf
markrad 0:cdf462088d13 27 *
markrad 0:cdf462088d13 28 * We use the algorithm described as Shoup's method with 4-bit tables in
markrad 0:cdf462088d13 29 * [MGV] 4.1, pp. 12-13, to enhance speed without using too much memory.
markrad 0:cdf462088d13 30 */
markrad 0:cdf462088d13 31
markrad 0:cdf462088d13 32 #if !defined(MBEDTLS_CONFIG_FILE)
markrad 0:cdf462088d13 33 #include "mbedtls/config.h"
markrad 0:cdf462088d13 34 #else
markrad 0:cdf462088d13 35 #include MBEDTLS_CONFIG_FILE
markrad 0:cdf462088d13 36 #endif
markrad 0:cdf462088d13 37
markrad 0:cdf462088d13 38 #if defined(MBEDTLS_GCM_C)
markrad 0:cdf462088d13 39
markrad 0:cdf462088d13 40 #include "mbedtls/gcm.h"
markrad 0:cdf462088d13 41
markrad 0:cdf462088d13 42 #include <string.h>
markrad 0:cdf462088d13 43
markrad 0:cdf462088d13 44 #if defined(MBEDTLS_AESNI_C)
markrad 0:cdf462088d13 45 #include "mbedtls/aesni.h"
markrad 0:cdf462088d13 46 #endif
markrad 0:cdf462088d13 47
markrad 0:cdf462088d13 48 #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
markrad 0:cdf462088d13 49 #if defined(MBEDTLS_PLATFORM_C)
markrad 0:cdf462088d13 50 #include "mbedtls/platform.h"
markrad 0:cdf462088d13 51 #else
markrad 0:cdf462088d13 52 #include <stdio.h>
markrad 0:cdf462088d13 53 #define mbedtls_printf printf
markrad 0:cdf462088d13 54 #endif /* MBEDTLS_PLATFORM_C */
markrad 0:cdf462088d13 55 #endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
markrad 0:cdf462088d13 56
markrad 0:cdf462088d13 57 /*
markrad 0:cdf462088d13 58 * 32-bit integer manipulation macros (big endian)
markrad 0:cdf462088d13 59 */
markrad 0:cdf462088d13 60 #ifndef GET_UINT32_BE
markrad 0:cdf462088d13 61 #define GET_UINT32_BE(n,b,i) \
markrad 0:cdf462088d13 62 { \
markrad 0:cdf462088d13 63 (n) = ( (uint32_t) (b)[(i) ] << 24 ) \
markrad 0:cdf462088d13 64 | ( (uint32_t) (b)[(i) + 1] << 16 ) \
markrad 0:cdf462088d13 65 | ( (uint32_t) (b)[(i) + 2] << 8 ) \
markrad 0:cdf462088d13 66 | ( (uint32_t) (b)[(i) + 3] ); \
markrad 0:cdf462088d13 67 }
markrad 0:cdf462088d13 68 #endif
markrad 0:cdf462088d13 69
markrad 0:cdf462088d13 70 #ifndef PUT_UINT32_BE
markrad 0:cdf462088d13 71 #define PUT_UINT32_BE(n,b,i) \
markrad 0:cdf462088d13 72 { \
markrad 0:cdf462088d13 73 (b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
markrad 0:cdf462088d13 74 (b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
markrad 0:cdf462088d13 75 (b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
markrad 0:cdf462088d13 76 (b)[(i) + 3] = (unsigned char) ( (n) ); \
markrad 0:cdf462088d13 77 }
markrad 0:cdf462088d13 78 #endif
markrad 0:cdf462088d13 79
markrad 0:cdf462088d13 80 /* Implementation that should never be optimized out by the compiler */
markrad 0:cdf462088d13 81 static void mbedtls_zeroize( void *v, size_t n ) {
markrad 0:cdf462088d13 82 volatile unsigned char *p = v; while( n-- ) *p++ = 0;
markrad 0:cdf462088d13 83 }
markrad 0:cdf462088d13 84
markrad 0:cdf462088d13 85 /*
markrad 0:cdf462088d13 86 * Initialize a context
markrad 0:cdf462088d13 87 */
markrad 0:cdf462088d13 88 void mbedtls_gcm_init( mbedtls_gcm_context *ctx )
markrad 0:cdf462088d13 89 {
markrad 0:cdf462088d13 90 memset( ctx, 0, sizeof( mbedtls_gcm_context ) );
markrad 0:cdf462088d13 91 }
markrad 0:cdf462088d13 92
markrad 0:cdf462088d13 93 /*
markrad 0:cdf462088d13 94 * Precompute small multiples of H, that is set
markrad 0:cdf462088d13 95 * HH[i] || HL[i] = H times i,
markrad 0:cdf462088d13 96 * where i is seen as a field element as in [MGV], ie high-order bits
markrad 0:cdf462088d13 97 * correspond to low powers of P. The result is stored in the same way, that
markrad 0:cdf462088d13 98 * is the high-order bit of HH corresponds to P^0 and the low-order bit of HL
markrad 0:cdf462088d13 99 * corresponds to P^127.
markrad 0:cdf462088d13 100 */
markrad 0:cdf462088d13 101 static int gcm_gen_table( mbedtls_gcm_context *ctx )
markrad 0:cdf462088d13 102 {
markrad 0:cdf462088d13 103 int ret, i, j;
markrad 0:cdf462088d13 104 uint64_t hi, lo;
markrad 0:cdf462088d13 105 uint64_t vl, vh;
markrad 0:cdf462088d13 106 unsigned char h[16];
markrad 0:cdf462088d13 107 size_t olen = 0;
markrad 0:cdf462088d13 108
markrad 0:cdf462088d13 109 memset( h, 0, 16 );
markrad 0:cdf462088d13 110 if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, h, 16, h, &olen ) ) != 0 )
markrad 0:cdf462088d13 111 return( ret );
markrad 0:cdf462088d13 112
markrad 0:cdf462088d13 113 /* pack h as two 64-bits ints, big-endian */
markrad 0:cdf462088d13 114 GET_UINT32_BE( hi, h, 0 );
markrad 0:cdf462088d13 115 GET_UINT32_BE( lo, h, 4 );
markrad 0:cdf462088d13 116 vh = (uint64_t) hi << 32 | lo;
markrad 0:cdf462088d13 117
markrad 0:cdf462088d13 118 GET_UINT32_BE( hi, h, 8 );
markrad 0:cdf462088d13 119 GET_UINT32_BE( lo, h, 12 );
markrad 0:cdf462088d13 120 vl = (uint64_t) hi << 32 | lo;
markrad 0:cdf462088d13 121
markrad 0:cdf462088d13 122 /* 8 = 1000 corresponds to 1 in GF(2^128) */
markrad 0:cdf462088d13 123 ctx->HL[8] = vl;
markrad 0:cdf462088d13 124 ctx->HH[8] = vh;
markrad 0:cdf462088d13 125
markrad 0:cdf462088d13 126 #if defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_HAVE_X86_64)
markrad 0:cdf462088d13 127 /* With CLMUL support, we need only h, not the rest of the table */
markrad 0:cdf462088d13 128 if( mbedtls_aesni_has_support( MBEDTLS_AESNI_CLMUL ) )
markrad 0:cdf462088d13 129 return( 0 );
markrad 0:cdf462088d13 130 #endif
markrad 0:cdf462088d13 131
markrad 0:cdf462088d13 132 /* 0 corresponds to 0 in GF(2^128) */
markrad 0:cdf462088d13 133 ctx->HH[0] = 0;
markrad 0:cdf462088d13 134 ctx->HL[0] = 0;
markrad 0:cdf462088d13 135
markrad 0:cdf462088d13 136 for( i = 4; i > 0; i >>= 1 )
markrad 0:cdf462088d13 137 {
markrad 0:cdf462088d13 138 uint32_t T = ( vl & 1 ) * 0xe1000000U;
markrad 0:cdf462088d13 139 vl = ( vh << 63 ) | ( vl >> 1 );
markrad 0:cdf462088d13 140 vh = ( vh >> 1 ) ^ ( (uint64_t) T << 32);
markrad 0:cdf462088d13 141
markrad 0:cdf462088d13 142 ctx->HL[i] = vl;
markrad 0:cdf462088d13 143 ctx->HH[i] = vh;
markrad 0:cdf462088d13 144 }
markrad 0:cdf462088d13 145
markrad 0:cdf462088d13 146 for( i = 2; i <= 8; i *= 2 )
markrad 0:cdf462088d13 147 {
markrad 0:cdf462088d13 148 uint64_t *HiL = ctx->HL + i, *HiH = ctx->HH + i;
markrad 0:cdf462088d13 149 vh = *HiH;
markrad 0:cdf462088d13 150 vl = *HiL;
markrad 0:cdf462088d13 151 for( j = 1; j < i; j++ )
markrad 0:cdf462088d13 152 {
markrad 0:cdf462088d13 153 HiH[j] = vh ^ ctx->HH[j];
markrad 0:cdf462088d13 154 HiL[j] = vl ^ ctx->HL[j];
markrad 0:cdf462088d13 155 }
markrad 0:cdf462088d13 156 }
markrad 0:cdf462088d13 157
markrad 0:cdf462088d13 158 return( 0 );
markrad 0:cdf462088d13 159 }
markrad 0:cdf462088d13 160
markrad 0:cdf462088d13 161 int mbedtls_gcm_setkey( mbedtls_gcm_context *ctx,
markrad 0:cdf462088d13 162 mbedtls_cipher_id_t cipher,
markrad 0:cdf462088d13 163 const unsigned char *key,
markrad 0:cdf462088d13 164 unsigned int keybits )
markrad 0:cdf462088d13 165 {
markrad 0:cdf462088d13 166 int ret;
markrad 0:cdf462088d13 167 const mbedtls_cipher_info_t *cipher_info;
markrad 0:cdf462088d13 168
markrad 0:cdf462088d13 169 cipher_info = mbedtls_cipher_info_from_values( cipher, keybits, MBEDTLS_MODE_ECB );
markrad 0:cdf462088d13 170 if( cipher_info == NULL )
markrad 0:cdf462088d13 171 return( MBEDTLS_ERR_GCM_BAD_INPUT );
markrad 0:cdf462088d13 172
markrad 0:cdf462088d13 173 if( cipher_info->block_size != 16 )
markrad 0:cdf462088d13 174 return( MBEDTLS_ERR_GCM_BAD_INPUT );
markrad 0:cdf462088d13 175
markrad 0:cdf462088d13 176 mbedtls_cipher_free( &ctx->cipher_ctx );
markrad 0:cdf462088d13 177
markrad 0:cdf462088d13 178 if( ( ret = mbedtls_cipher_setup( &ctx->cipher_ctx, cipher_info ) ) != 0 )
markrad 0:cdf462088d13 179 return( ret );
markrad 0:cdf462088d13 180
markrad 0:cdf462088d13 181 if( ( ret = mbedtls_cipher_setkey( &ctx->cipher_ctx, key, keybits,
markrad 0:cdf462088d13 182 MBEDTLS_ENCRYPT ) ) != 0 )
markrad 0:cdf462088d13 183 {
markrad 0:cdf462088d13 184 return( ret );
markrad 0:cdf462088d13 185 }
markrad 0:cdf462088d13 186
markrad 0:cdf462088d13 187 if( ( ret = gcm_gen_table( ctx ) ) != 0 )
markrad 0:cdf462088d13 188 return( ret );
markrad 0:cdf462088d13 189
markrad 0:cdf462088d13 190 return( 0 );
markrad 0:cdf462088d13 191 }
markrad 0:cdf462088d13 192
markrad 0:cdf462088d13 193 /*
markrad 0:cdf462088d13 194 * Shoup's method for multiplication use this table with
markrad 0:cdf462088d13 195 * last4[x] = x times P^128
markrad 0:cdf462088d13 196 * where x and last4[x] are seen as elements of GF(2^128) as in [MGV]
markrad 0:cdf462088d13 197 */
markrad 0:cdf462088d13 198 static const uint64_t last4[16] =
markrad 0:cdf462088d13 199 {
markrad 0:cdf462088d13 200 0x0000, 0x1c20, 0x3840, 0x2460,
markrad 0:cdf462088d13 201 0x7080, 0x6ca0, 0x48c0, 0x54e0,
markrad 0:cdf462088d13 202 0xe100, 0xfd20, 0xd940, 0xc560,
markrad 0:cdf462088d13 203 0x9180, 0x8da0, 0xa9c0, 0xb5e0
markrad 0:cdf462088d13 204 };
markrad 0:cdf462088d13 205
markrad 0:cdf462088d13 206 /*
markrad 0:cdf462088d13 207 * Sets output to x times H using the precomputed tables.
markrad 0:cdf462088d13 208 * x and output are seen as elements of GF(2^128) as in [MGV].
markrad 0:cdf462088d13 209 */
markrad 0:cdf462088d13 210 static void gcm_mult( mbedtls_gcm_context *ctx, const unsigned char x[16],
markrad 0:cdf462088d13 211 unsigned char output[16] )
markrad 0:cdf462088d13 212 {
markrad 0:cdf462088d13 213 int i = 0;
markrad 0:cdf462088d13 214 unsigned char lo, hi, rem;
markrad 0:cdf462088d13 215 uint64_t zh, zl;
markrad 0:cdf462088d13 216
markrad 0:cdf462088d13 217 #if defined(MBEDTLS_AESNI_C) && defined(MBEDTLS_HAVE_X86_64)
markrad 0:cdf462088d13 218 if( mbedtls_aesni_has_support( MBEDTLS_AESNI_CLMUL ) ) {
markrad 0:cdf462088d13 219 unsigned char h[16];
markrad 0:cdf462088d13 220
markrad 0:cdf462088d13 221 PUT_UINT32_BE( ctx->HH[8] >> 32, h, 0 );
markrad 0:cdf462088d13 222 PUT_UINT32_BE( ctx->HH[8], h, 4 );
markrad 0:cdf462088d13 223 PUT_UINT32_BE( ctx->HL[8] >> 32, h, 8 );
markrad 0:cdf462088d13 224 PUT_UINT32_BE( ctx->HL[8], h, 12 );
markrad 0:cdf462088d13 225
markrad 0:cdf462088d13 226 mbedtls_aesni_gcm_mult( output, x, h );
markrad 0:cdf462088d13 227 return;
markrad 0:cdf462088d13 228 }
markrad 0:cdf462088d13 229 #endif /* MBEDTLS_AESNI_C && MBEDTLS_HAVE_X86_64 */
markrad 0:cdf462088d13 230
markrad 0:cdf462088d13 231 lo = x[15] & 0xf;
markrad 0:cdf462088d13 232
markrad 0:cdf462088d13 233 zh = ctx->HH[lo];
markrad 0:cdf462088d13 234 zl = ctx->HL[lo];
markrad 0:cdf462088d13 235
markrad 0:cdf462088d13 236 for( i = 15; i >= 0; i-- )
markrad 0:cdf462088d13 237 {
markrad 0:cdf462088d13 238 lo = x[i] & 0xf;
markrad 0:cdf462088d13 239 hi = x[i] >> 4;
markrad 0:cdf462088d13 240
markrad 0:cdf462088d13 241 if( i != 15 )
markrad 0:cdf462088d13 242 {
markrad 0:cdf462088d13 243 rem = (unsigned char) zl & 0xf;
markrad 0:cdf462088d13 244 zl = ( zh << 60 ) | ( zl >> 4 );
markrad 0:cdf462088d13 245 zh = ( zh >> 4 );
markrad 0:cdf462088d13 246 zh ^= (uint64_t) last4[rem] << 48;
markrad 0:cdf462088d13 247 zh ^= ctx->HH[lo];
markrad 0:cdf462088d13 248 zl ^= ctx->HL[lo];
markrad 0:cdf462088d13 249
markrad 0:cdf462088d13 250 }
markrad 0:cdf462088d13 251
markrad 0:cdf462088d13 252 rem = (unsigned char) zl & 0xf;
markrad 0:cdf462088d13 253 zl = ( zh << 60 ) | ( zl >> 4 );
markrad 0:cdf462088d13 254 zh = ( zh >> 4 );
markrad 0:cdf462088d13 255 zh ^= (uint64_t) last4[rem] << 48;
markrad 0:cdf462088d13 256 zh ^= ctx->HH[hi];
markrad 0:cdf462088d13 257 zl ^= ctx->HL[hi];
markrad 0:cdf462088d13 258 }
markrad 0:cdf462088d13 259
markrad 0:cdf462088d13 260 PUT_UINT32_BE( zh >> 32, output, 0 );
markrad 0:cdf462088d13 261 PUT_UINT32_BE( zh, output, 4 );
markrad 0:cdf462088d13 262 PUT_UINT32_BE( zl >> 32, output, 8 );
markrad 0:cdf462088d13 263 PUT_UINT32_BE( zl, output, 12 );
markrad 0:cdf462088d13 264 }
markrad 0:cdf462088d13 265
markrad 0:cdf462088d13 266 int mbedtls_gcm_starts( mbedtls_gcm_context *ctx,
markrad 0:cdf462088d13 267 int mode,
markrad 0:cdf462088d13 268 const unsigned char *iv,
markrad 0:cdf462088d13 269 size_t iv_len,
markrad 0:cdf462088d13 270 const unsigned char *add,
markrad 0:cdf462088d13 271 size_t add_len )
markrad 0:cdf462088d13 272 {
markrad 0:cdf462088d13 273 int ret;
markrad 0:cdf462088d13 274 unsigned char work_buf[16];
markrad 0:cdf462088d13 275 size_t i;
markrad 0:cdf462088d13 276 const unsigned char *p;
markrad 0:cdf462088d13 277 size_t use_len, olen = 0;
markrad 0:cdf462088d13 278
markrad 0:cdf462088d13 279 /* IV and AD are limited to 2^64 bits, so 2^61 bytes */
markrad 0:cdf462088d13 280 if( ( (uint64_t) iv_len ) >> 61 != 0 ||
markrad 0:cdf462088d13 281 ( (uint64_t) add_len ) >> 61 != 0 )
markrad 0:cdf462088d13 282 {
markrad 0:cdf462088d13 283 return( MBEDTLS_ERR_GCM_BAD_INPUT );
markrad 0:cdf462088d13 284 }
markrad 0:cdf462088d13 285
markrad 0:cdf462088d13 286 memset( ctx->y, 0x00, sizeof(ctx->y) );
markrad 0:cdf462088d13 287 memset( ctx->buf, 0x00, sizeof(ctx->buf) );
markrad 0:cdf462088d13 288
markrad 0:cdf462088d13 289 ctx->mode = mode;
markrad 0:cdf462088d13 290 ctx->len = 0;
markrad 0:cdf462088d13 291 ctx->add_len = 0;
markrad 0:cdf462088d13 292
markrad 0:cdf462088d13 293 if( iv_len == 12 )
markrad 0:cdf462088d13 294 {
markrad 0:cdf462088d13 295 memcpy( ctx->y, iv, iv_len );
markrad 0:cdf462088d13 296 ctx->y[15] = 1;
markrad 0:cdf462088d13 297 }
markrad 0:cdf462088d13 298 else
markrad 0:cdf462088d13 299 {
markrad 0:cdf462088d13 300 memset( work_buf, 0x00, 16 );
markrad 0:cdf462088d13 301 PUT_UINT32_BE( iv_len * 8, work_buf, 12 );
markrad 0:cdf462088d13 302
markrad 0:cdf462088d13 303 p = iv;
markrad 0:cdf462088d13 304 while( iv_len > 0 )
markrad 0:cdf462088d13 305 {
markrad 0:cdf462088d13 306 use_len = ( iv_len < 16 ) ? iv_len : 16;
markrad 0:cdf462088d13 307
markrad 0:cdf462088d13 308 for( i = 0; i < use_len; i++ )
markrad 0:cdf462088d13 309 ctx->y[i] ^= p[i];
markrad 0:cdf462088d13 310
markrad 0:cdf462088d13 311 gcm_mult( ctx, ctx->y, ctx->y );
markrad 0:cdf462088d13 312
markrad 0:cdf462088d13 313 iv_len -= use_len;
markrad 0:cdf462088d13 314 p += use_len;
markrad 0:cdf462088d13 315 }
markrad 0:cdf462088d13 316
markrad 0:cdf462088d13 317 for( i = 0; i < 16; i++ )
markrad 0:cdf462088d13 318 ctx->y[i] ^= work_buf[i];
markrad 0:cdf462088d13 319
markrad 0:cdf462088d13 320 gcm_mult( ctx, ctx->y, ctx->y );
markrad 0:cdf462088d13 321 }
markrad 0:cdf462088d13 322
markrad 0:cdf462088d13 323 if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16, ctx->base_ectr,
markrad 0:cdf462088d13 324 &olen ) ) != 0 )
markrad 0:cdf462088d13 325 {
markrad 0:cdf462088d13 326 return( ret );
markrad 0:cdf462088d13 327 }
markrad 0:cdf462088d13 328
markrad 0:cdf462088d13 329 ctx->add_len = add_len;
markrad 0:cdf462088d13 330 p = add;
markrad 0:cdf462088d13 331 while( add_len > 0 )
markrad 0:cdf462088d13 332 {
markrad 0:cdf462088d13 333 use_len = ( add_len < 16 ) ? add_len : 16;
markrad 0:cdf462088d13 334
markrad 0:cdf462088d13 335 for( i = 0; i < use_len; i++ )
markrad 0:cdf462088d13 336 ctx->buf[i] ^= p[i];
markrad 0:cdf462088d13 337
markrad 0:cdf462088d13 338 gcm_mult( ctx, ctx->buf, ctx->buf );
markrad 0:cdf462088d13 339
markrad 0:cdf462088d13 340 add_len -= use_len;
markrad 0:cdf462088d13 341 p += use_len;
markrad 0:cdf462088d13 342 }
markrad 0:cdf462088d13 343
markrad 0:cdf462088d13 344 return( 0 );
markrad 0:cdf462088d13 345 }
markrad 0:cdf462088d13 346
markrad 0:cdf462088d13 347 int mbedtls_gcm_update( mbedtls_gcm_context *ctx,
markrad 0:cdf462088d13 348 size_t length,
markrad 0:cdf462088d13 349 const unsigned char *input,
markrad 0:cdf462088d13 350 unsigned char *output )
markrad 0:cdf462088d13 351 {
markrad 0:cdf462088d13 352 int ret;
markrad 0:cdf462088d13 353 unsigned char ectr[16];
markrad 0:cdf462088d13 354 size_t i;
markrad 0:cdf462088d13 355 const unsigned char *p;
markrad 0:cdf462088d13 356 unsigned char *out_p = output;
markrad 0:cdf462088d13 357 size_t use_len, olen = 0;
markrad 0:cdf462088d13 358
markrad 0:cdf462088d13 359 if( output > input && (size_t) ( output - input ) < length )
markrad 0:cdf462088d13 360 return( MBEDTLS_ERR_GCM_BAD_INPUT );
markrad 0:cdf462088d13 361
markrad 0:cdf462088d13 362 /* Total length is restricted to 2^39 - 256 bits, ie 2^36 - 2^5 bytes
markrad 0:cdf462088d13 363 * Also check for possible overflow */
markrad 0:cdf462088d13 364 if( ctx->len + length < ctx->len ||
markrad 0:cdf462088d13 365 (uint64_t) ctx->len + length > 0xFFFFFFFE0ull )
markrad 0:cdf462088d13 366 {
markrad 0:cdf462088d13 367 return( MBEDTLS_ERR_GCM_BAD_INPUT );
markrad 0:cdf462088d13 368 }
markrad 0:cdf462088d13 369
markrad 0:cdf462088d13 370 ctx->len += length;
markrad 0:cdf462088d13 371
markrad 0:cdf462088d13 372 p = input;
markrad 0:cdf462088d13 373 while( length > 0 )
markrad 0:cdf462088d13 374 {
markrad 0:cdf462088d13 375 use_len = ( length < 16 ) ? length : 16;
markrad 0:cdf462088d13 376
markrad 0:cdf462088d13 377 for( i = 16; i > 12; i-- )
markrad 0:cdf462088d13 378 if( ++ctx->y[i - 1] != 0 )
markrad 0:cdf462088d13 379 break;
markrad 0:cdf462088d13 380
markrad 0:cdf462088d13 381 if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->y, 16, ectr,
markrad 0:cdf462088d13 382 &olen ) ) != 0 )
markrad 0:cdf462088d13 383 {
markrad 0:cdf462088d13 384 return( ret );
markrad 0:cdf462088d13 385 }
markrad 0:cdf462088d13 386
markrad 0:cdf462088d13 387 for( i = 0; i < use_len; i++ )
markrad 0:cdf462088d13 388 {
markrad 0:cdf462088d13 389 if( ctx->mode == MBEDTLS_GCM_DECRYPT )
markrad 0:cdf462088d13 390 ctx->buf[i] ^= p[i];
markrad 0:cdf462088d13 391 out_p[i] = ectr[i] ^ p[i];
markrad 0:cdf462088d13 392 if( ctx->mode == MBEDTLS_GCM_ENCRYPT )
markrad 0:cdf462088d13 393 ctx->buf[i] ^= out_p[i];
markrad 0:cdf462088d13 394 }
markrad 0:cdf462088d13 395
markrad 0:cdf462088d13 396 gcm_mult( ctx, ctx->buf, ctx->buf );
markrad 0:cdf462088d13 397
markrad 0:cdf462088d13 398 length -= use_len;
markrad 0:cdf462088d13 399 p += use_len;
markrad 0:cdf462088d13 400 out_p += use_len;
markrad 0:cdf462088d13 401 }
markrad 0:cdf462088d13 402
markrad 0:cdf462088d13 403 return( 0 );
markrad 0:cdf462088d13 404 }
markrad 0:cdf462088d13 405
markrad 0:cdf462088d13 406 int mbedtls_gcm_finish( mbedtls_gcm_context *ctx,
markrad 0:cdf462088d13 407 unsigned char *tag,
markrad 0:cdf462088d13 408 size_t tag_len )
markrad 0:cdf462088d13 409 {
markrad 0:cdf462088d13 410 unsigned char work_buf[16];
markrad 0:cdf462088d13 411 size_t i;
markrad 0:cdf462088d13 412 uint64_t orig_len = ctx->len * 8;
markrad 0:cdf462088d13 413 uint64_t orig_add_len = ctx->add_len * 8;
markrad 0:cdf462088d13 414
markrad 0:cdf462088d13 415 if( tag_len > 16 || tag_len < 4 )
markrad 0:cdf462088d13 416 return( MBEDTLS_ERR_GCM_BAD_INPUT );
markrad 0:cdf462088d13 417
markrad 0:cdf462088d13 418 memcpy( tag, ctx->base_ectr, tag_len );
markrad 0:cdf462088d13 419
markrad 0:cdf462088d13 420 if( orig_len || orig_add_len )
markrad 0:cdf462088d13 421 {
markrad 0:cdf462088d13 422 memset( work_buf, 0x00, 16 );
markrad 0:cdf462088d13 423
markrad 0:cdf462088d13 424 PUT_UINT32_BE( ( orig_add_len >> 32 ), work_buf, 0 );
markrad 0:cdf462088d13 425 PUT_UINT32_BE( ( orig_add_len ), work_buf, 4 );
markrad 0:cdf462088d13 426 PUT_UINT32_BE( ( orig_len >> 32 ), work_buf, 8 );
markrad 0:cdf462088d13 427 PUT_UINT32_BE( ( orig_len ), work_buf, 12 );
markrad 0:cdf462088d13 428
markrad 0:cdf462088d13 429 for( i = 0; i < 16; i++ )
markrad 0:cdf462088d13 430 ctx->buf[i] ^= work_buf[i];
markrad 0:cdf462088d13 431
markrad 0:cdf462088d13 432 gcm_mult( ctx, ctx->buf, ctx->buf );
markrad 0:cdf462088d13 433
markrad 0:cdf462088d13 434 for( i = 0; i < tag_len; i++ )
markrad 0:cdf462088d13 435 tag[i] ^= ctx->buf[i];
markrad 0:cdf462088d13 436 }
markrad 0:cdf462088d13 437
markrad 0:cdf462088d13 438 return( 0 );
markrad 0:cdf462088d13 439 }
markrad 0:cdf462088d13 440
markrad 0:cdf462088d13 441 int mbedtls_gcm_crypt_and_tag( mbedtls_gcm_context *ctx,
markrad 0:cdf462088d13 442 int mode,
markrad 0:cdf462088d13 443 size_t length,
markrad 0:cdf462088d13 444 const unsigned char *iv,
markrad 0:cdf462088d13 445 size_t iv_len,
markrad 0:cdf462088d13 446 const unsigned char *add,
markrad 0:cdf462088d13 447 size_t add_len,
markrad 0:cdf462088d13 448 const unsigned char *input,
markrad 0:cdf462088d13 449 unsigned char *output,
markrad 0:cdf462088d13 450 size_t tag_len,
markrad 0:cdf462088d13 451 unsigned char *tag )
markrad 0:cdf462088d13 452 {
markrad 0:cdf462088d13 453 int ret;
markrad 0:cdf462088d13 454
markrad 0:cdf462088d13 455 if( ( ret = mbedtls_gcm_starts( ctx, mode, iv, iv_len, add, add_len ) ) != 0 )
markrad 0:cdf462088d13 456 return( ret );
markrad 0:cdf462088d13 457
markrad 0:cdf462088d13 458 if( ( ret = mbedtls_gcm_update( ctx, length, input, output ) ) != 0 )
markrad 0:cdf462088d13 459 return( ret );
markrad 0:cdf462088d13 460
markrad 0:cdf462088d13 461 if( ( ret = mbedtls_gcm_finish( ctx, tag, tag_len ) ) != 0 )
markrad 0:cdf462088d13 462 return( ret );
markrad 0:cdf462088d13 463
markrad 0:cdf462088d13 464 return( 0 );
markrad 0:cdf462088d13 465 }
markrad 0:cdf462088d13 466
markrad 0:cdf462088d13 467 int mbedtls_gcm_auth_decrypt( mbedtls_gcm_context *ctx,
markrad 0:cdf462088d13 468 size_t length,
markrad 0:cdf462088d13 469 const unsigned char *iv,
markrad 0:cdf462088d13 470 size_t iv_len,
markrad 0:cdf462088d13 471 const unsigned char *add,
markrad 0:cdf462088d13 472 size_t add_len,
markrad 0:cdf462088d13 473 const unsigned char *tag,
markrad 0:cdf462088d13 474 size_t tag_len,
markrad 0:cdf462088d13 475 const unsigned char *input,
markrad 0:cdf462088d13 476 unsigned char *output )
markrad 0:cdf462088d13 477 {
markrad 0:cdf462088d13 478 int ret;
markrad 0:cdf462088d13 479 unsigned char check_tag[16];
markrad 0:cdf462088d13 480 size_t i;
markrad 0:cdf462088d13 481 int diff;
markrad 0:cdf462088d13 482
markrad 0:cdf462088d13 483 if( ( ret = mbedtls_gcm_crypt_and_tag( ctx, MBEDTLS_GCM_DECRYPT, length,
markrad 0:cdf462088d13 484 iv, iv_len, add, add_len,
markrad 0:cdf462088d13 485 input, output, tag_len, check_tag ) ) != 0 )
markrad 0:cdf462088d13 486 {
markrad 0:cdf462088d13 487 return( ret );
markrad 0:cdf462088d13 488 }
markrad 0:cdf462088d13 489
markrad 0:cdf462088d13 490 /* Check tag in "constant-time" */
markrad 0:cdf462088d13 491 for( diff = 0, i = 0; i < tag_len; i++ )
markrad 0:cdf462088d13 492 diff |= tag[i] ^ check_tag[i];
markrad 0:cdf462088d13 493
markrad 0:cdf462088d13 494 if( diff != 0 )
markrad 0:cdf462088d13 495 {
markrad 0:cdf462088d13 496 mbedtls_zeroize( output, length );
markrad 0:cdf462088d13 497 return( MBEDTLS_ERR_GCM_AUTH_FAILED );
markrad 0:cdf462088d13 498 }
markrad 0:cdf462088d13 499
markrad 0:cdf462088d13 500 return( 0 );
markrad 0:cdf462088d13 501 }
markrad 0:cdf462088d13 502
markrad 0:cdf462088d13 503 void mbedtls_gcm_free( mbedtls_gcm_context *ctx )
markrad 0:cdf462088d13 504 {
markrad 0:cdf462088d13 505 mbedtls_cipher_free( &ctx->cipher_ctx );
markrad 0:cdf462088d13 506 mbedtls_zeroize( ctx, sizeof( mbedtls_gcm_context ) );
markrad 0:cdf462088d13 507 }
markrad 0:cdf462088d13 508
markrad 0:cdf462088d13 509 #if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
markrad 0:cdf462088d13 510 /*
markrad 0:cdf462088d13 511 * AES-GCM test vectors from:
markrad 0:cdf462088d13 512 *
markrad 0:cdf462088d13 513 * http://csrc.nist.gov/groups/STM/cavp/documents/mac/gcmtestvectors.zip
markrad 0:cdf462088d13 514 */
markrad 0:cdf462088d13 515 #define MAX_TESTS 6
markrad 0:cdf462088d13 516
markrad 0:cdf462088d13 517 static const int key_index[MAX_TESTS] =
markrad 0:cdf462088d13 518 { 0, 0, 1, 1, 1, 1 };
markrad 0:cdf462088d13 519
markrad 0:cdf462088d13 520 static const unsigned char key[MAX_TESTS][32] =
markrad 0:cdf462088d13 521 {
markrad 0:cdf462088d13 522 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
markrad 0:cdf462088d13 523 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
markrad 0:cdf462088d13 524 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
markrad 0:cdf462088d13 525 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
markrad 0:cdf462088d13 526 { 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
markrad 0:cdf462088d13 527 0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08,
markrad 0:cdf462088d13 528 0xfe, 0xff, 0xe9, 0x92, 0x86, 0x65, 0x73, 0x1c,
markrad 0:cdf462088d13 529 0x6d, 0x6a, 0x8f, 0x94, 0x67, 0x30, 0x83, 0x08 },
markrad 0:cdf462088d13 530 };
markrad 0:cdf462088d13 531
markrad 0:cdf462088d13 532 static const size_t iv_len[MAX_TESTS] =
markrad 0:cdf462088d13 533 { 12, 12, 12, 12, 8, 60 };
markrad 0:cdf462088d13 534
markrad 0:cdf462088d13 535 static const int iv_index[MAX_TESTS] =
markrad 0:cdf462088d13 536 { 0, 0, 1, 1, 1, 2 };
markrad 0:cdf462088d13 537
markrad 0:cdf462088d13 538 static const unsigned char iv[MAX_TESTS][64] =
markrad 0:cdf462088d13 539 {
markrad 0:cdf462088d13 540 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
markrad 0:cdf462088d13 541 0x00, 0x00, 0x00, 0x00 },
markrad 0:cdf462088d13 542 { 0xca, 0xfe, 0xba, 0xbe, 0xfa, 0xce, 0xdb, 0xad,
markrad 0:cdf462088d13 543 0xde, 0xca, 0xf8, 0x88 },
markrad 0:cdf462088d13 544 { 0x93, 0x13, 0x22, 0x5d, 0xf8, 0x84, 0x06, 0xe5,
markrad 0:cdf462088d13 545 0x55, 0x90, 0x9c, 0x5a, 0xff, 0x52, 0x69, 0xaa,
markrad 0:cdf462088d13 546 0x6a, 0x7a, 0x95, 0x38, 0x53, 0x4f, 0x7d, 0xa1,
markrad 0:cdf462088d13 547 0xe4, 0xc3, 0x03, 0xd2, 0xa3, 0x18, 0xa7, 0x28,
markrad 0:cdf462088d13 548 0xc3, 0xc0, 0xc9, 0x51, 0x56, 0x80, 0x95, 0x39,
markrad 0:cdf462088d13 549 0xfc, 0xf0, 0xe2, 0x42, 0x9a, 0x6b, 0x52, 0x54,
markrad 0:cdf462088d13 550 0x16, 0xae, 0xdb, 0xf5, 0xa0, 0xde, 0x6a, 0x57,
markrad 0:cdf462088d13 551 0xa6, 0x37, 0xb3, 0x9b },
markrad 0:cdf462088d13 552 };
markrad 0:cdf462088d13 553
markrad 0:cdf462088d13 554 static const size_t add_len[MAX_TESTS] =
markrad 0:cdf462088d13 555 { 0, 0, 0, 20, 20, 20 };
markrad 0:cdf462088d13 556
markrad 0:cdf462088d13 557 static const int add_index[MAX_TESTS] =
markrad 0:cdf462088d13 558 { 0, 0, 0, 1, 1, 1 };
markrad 0:cdf462088d13 559
markrad 0:cdf462088d13 560 static const unsigned char additional[MAX_TESTS][64] =
markrad 0:cdf462088d13 561 {
markrad 0:cdf462088d13 562 { 0x00 },
markrad 0:cdf462088d13 563 { 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
markrad 0:cdf462088d13 564 0xfe, 0xed, 0xfa, 0xce, 0xde, 0xad, 0xbe, 0xef,
markrad 0:cdf462088d13 565 0xab, 0xad, 0xda, 0xd2 },
markrad 0:cdf462088d13 566 };
markrad 0:cdf462088d13 567
markrad 0:cdf462088d13 568 static const size_t pt_len[MAX_TESTS] =
markrad 0:cdf462088d13 569 { 0, 16, 64, 60, 60, 60 };
markrad 0:cdf462088d13 570
markrad 0:cdf462088d13 571 static const int pt_index[MAX_TESTS] =
markrad 0:cdf462088d13 572 { 0, 0, 1, 1, 1, 1 };
markrad 0:cdf462088d13 573
markrad 0:cdf462088d13 574 static const unsigned char pt[MAX_TESTS][64] =
markrad 0:cdf462088d13 575 {
markrad 0:cdf462088d13 576 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
markrad 0:cdf462088d13 577 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
markrad 0:cdf462088d13 578 { 0xd9, 0x31, 0x32, 0x25, 0xf8, 0x84, 0x06, 0xe5,
markrad 0:cdf462088d13 579 0xa5, 0x59, 0x09, 0xc5, 0xaf, 0xf5, 0x26, 0x9a,
markrad 0:cdf462088d13 580 0x86, 0xa7, 0xa9, 0x53, 0x15, 0x34, 0xf7, 0xda,
markrad 0:cdf462088d13 581 0x2e, 0x4c, 0x30, 0x3d, 0x8a, 0x31, 0x8a, 0x72,
markrad 0:cdf462088d13 582 0x1c, 0x3c, 0x0c, 0x95, 0x95, 0x68, 0x09, 0x53,
markrad 0:cdf462088d13 583 0x2f, 0xcf, 0x0e, 0x24, 0x49, 0xa6, 0xb5, 0x25,
markrad 0:cdf462088d13 584 0xb1, 0x6a, 0xed, 0xf5, 0xaa, 0x0d, 0xe6, 0x57,
markrad 0:cdf462088d13 585 0xba, 0x63, 0x7b, 0x39, 0x1a, 0xaf, 0xd2, 0x55 },
markrad 0:cdf462088d13 586 };
markrad 0:cdf462088d13 587
markrad 0:cdf462088d13 588 static const unsigned char ct[MAX_TESTS * 3][64] =
markrad 0:cdf462088d13 589 {
markrad 0:cdf462088d13 590 { 0x00 },
markrad 0:cdf462088d13 591 { 0x03, 0x88, 0xda, 0xce, 0x60, 0xb6, 0xa3, 0x92,
markrad 0:cdf462088d13 592 0xf3, 0x28, 0xc2, 0xb9, 0x71, 0xb2, 0xfe, 0x78 },
markrad 0:cdf462088d13 593 { 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
markrad 0:cdf462088d13 594 0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
markrad 0:cdf462088d13 595 0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
markrad 0:cdf462088d13 596 0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
markrad 0:cdf462088d13 597 0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
markrad 0:cdf462088d13 598 0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
markrad 0:cdf462088d13 599 0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
markrad 0:cdf462088d13 600 0x3d, 0x58, 0xe0, 0x91, 0x47, 0x3f, 0x59, 0x85 },
markrad 0:cdf462088d13 601 { 0x42, 0x83, 0x1e, 0xc2, 0x21, 0x77, 0x74, 0x24,
markrad 0:cdf462088d13 602 0x4b, 0x72, 0x21, 0xb7, 0x84, 0xd0, 0xd4, 0x9c,
markrad 0:cdf462088d13 603 0xe3, 0xaa, 0x21, 0x2f, 0x2c, 0x02, 0xa4, 0xe0,
markrad 0:cdf462088d13 604 0x35, 0xc1, 0x7e, 0x23, 0x29, 0xac, 0xa1, 0x2e,
markrad 0:cdf462088d13 605 0x21, 0xd5, 0x14, 0xb2, 0x54, 0x66, 0x93, 0x1c,
markrad 0:cdf462088d13 606 0x7d, 0x8f, 0x6a, 0x5a, 0xac, 0x84, 0xaa, 0x05,
markrad 0:cdf462088d13 607 0x1b, 0xa3, 0x0b, 0x39, 0x6a, 0x0a, 0xac, 0x97,
markrad 0:cdf462088d13 608 0x3d, 0x58, 0xe0, 0x91 },
markrad 0:cdf462088d13 609 { 0x61, 0x35, 0x3b, 0x4c, 0x28, 0x06, 0x93, 0x4a,
markrad 0:cdf462088d13 610 0x77, 0x7f, 0xf5, 0x1f, 0xa2, 0x2a, 0x47, 0x55,
markrad 0:cdf462088d13 611 0x69, 0x9b, 0x2a, 0x71, 0x4f, 0xcd, 0xc6, 0xf8,
markrad 0:cdf462088d13 612 0x37, 0x66, 0xe5, 0xf9, 0x7b, 0x6c, 0x74, 0x23,
markrad 0:cdf462088d13 613 0x73, 0x80, 0x69, 0x00, 0xe4, 0x9f, 0x24, 0xb2,
markrad 0:cdf462088d13 614 0x2b, 0x09, 0x75, 0x44, 0xd4, 0x89, 0x6b, 0x42,
markrad 0:cdf462088d13 615 0x49, 0x89, 0xb5, 0xe1, 0xeb, 0xac, 0x0f, 0x07,
markrad 0:cdf462088d13 616 0xc2, 0x3f, 0x45, 0x98 },
markrad 0:cdf462088d13 617 { 0x8c, 0xe2, 0x49, 0x98, 0x62, 0x56, 0x15, 0xb6,
markrad 0:cdf462088d13 618 0x03, 0xa0, 0x33, 0xac, 0xa1, 0x3f, 0xb8, 0x94,
markrad 0:cdf462088d13 619 0xbe, 0x91, 0x12, 0xa5, 0xc3, 0xa2, 0x11, 0xa8,
markrad 0:cdf462088d13 620 0xba, 0x26, 0x2a, 0x3c, 0xca, 0x7e, 0x2c, 0xa7,
markrad 0:cdf462088d13 621 0x01, 0xe4, 0xa9, 0xa4, 0xfb, 0xa4, 0x3c, 0x90,
markrad 0:cdf462088d13 622 0xcc, 0xdc, 0xb2, 0x81, 0xd4, 0x8c, 0x7c, 0x6f,
markrad 0:cdf462088d13 623 0xd6, 0x28, 0x75, 0xd2, 0xac, 0xa4, 0x17, 0x03,
markrad 0:cdf462088d13 624 0x4c, 0x34, 0xae, 0xe5 },
markrad 0:cdf462088d13 625 { 0x00 },
markrad 0:cdf462088d13 626 { 0x98, 0xe7, 0x24, 0x7c, 0x07, 0xf0, 0xfe, 0x41,
markrad 0:cdf462088d13 627 0x1c, 0x26, 0x7e, 0x43, 0x84, 0xb0, 0xf6, 0x00 },
markrad 0:cdf462088d13 628 { 0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41,
markrad 0:cdf462088d13 629 0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, 0x27, 0x57,
markrad 0:cdf462088d13 630 0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84,
markrad 0:cdf462088d13 631 0x62, 0x85, 0x93, 0xb4, 0x0c, 0xa1, 0xe1, 0x9c,
markrad 0:cdf462088d13 632 0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25,
markrad 0:cdf462088d13 633 0xac, 0x61, 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47,
markrad 0:cdf462088d13 634 0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9,
markrad 0:cdf462088d13 635 0xcc, 0xda, 0x27, 0x10, 0xac, 0xad, 0xe2, 0x56 },
markrad 0:cdf462088d13 636 { 0x39, 0x80, 0xca, 0x0b, 0x3c, 0x00, 0xe8, 0x41,
markrad 0:cdf462088d13 637 0xeb, 0x06, 0xfa, 0xc4, 0x87, 0x2a, 0x27, 0x57,
markrad 0:cdf462088d13 638 0x85, 0x9e, 0x1c, 0xea, 0xa6, 0xef, 0xd9, 0x84,
markrad 0:cdf462088d13 639 0x62, 0x85, 0x93, 0xb4, 0x0c, 0xa1, 0xe1, 0x9c,
markrad 0:cdf462088d13 640 0x7d, 0x77, 0x3d, 0x00, 0xc1, 0x44, 0xc5, 0x25,
markrad 0:cdf462088d13 641 0xac, 0x61, 0x9d, 0x18, 0xc8, 0x4a, 0x3f, 0x47,
markrad 0:cdf462088d13 642 0x18, 0xe2, 0x44, 0x8b, 0x2f, 0xe3, 0x24, 0xd9,
markrad 0:cdf462088d13 643 0xcc, 0xda, 0x27, 0x10 },
markrad 0:cdf462088d13 644 { 0x0f, 0x10, 0xf5, 0x99, 0xae, 0x14, 0xa1, 0x54,
markrad 0:cdf462088d13 645 0xed, 0x24, 0xb3, 0x6e, 0x25, 0x32, 0x4d, 0xb8,
markrad 0:cdf462088d13 646 0xc5, 0x66, 0x63, 0x2e, 0xf2, 0xbb, 0xb3, 0x4f,
markrad 0:cdf462088d13 647 0x83, 0x47, 0x28, 0x0f, 0xc4, 0x50, 0x70, 0x57,
markrad 0:cdf462088d13 648 0xfd, 0xdc, 0x29, 0xdf, 0x9a, 0x47, 0x1f, 0x75,
markrad 0:cdf462088d13 649 0xc6, 0x65, 0x41, 0xd4, 0xd4, 0xda, 0xd1, 0xc9,
markrad 0:cdf462088d13 650 0xe9, 0x3a, 0x19, 0xa5, 0x8e, 0x8b, 0x47, 0x3f,
markrad 0:cdf462088d13 651 0xa0, 0xf0, 0x62, 0xf7 },
markrad 0:cdf462088d13 652 { 0xd2, 0x7e, 0x88, 0x68, 0x1c, 0xe3, 0x24, 0x3c,
markrad 0:cdf462088d13 653 0x48, 0x30, 0x16, 0x5a, 0x8f, 0xdc, 0xf9, 0xff,
markrad 0:cdf462088d13 654 0x1d, 0xe9, 0xa1, 0xd8, 0xe6, 0xb4, 0x47, 0xef,
markrad 0:cdf462088d13 655 0x6e, 0xf7, 0xb7, 0x98, 0x28, 0x66, 0x6e, 0x45,
markrad 0:cdf462088d13 656 0x81, 0xe7, 0x90, 0x12, 0xaf, 0x34, 0xdd, 0xd9,
markrad 0:cdf462088d13 657 0xe2, 0xf0, 0x37, 0x58, 0x9b, 0x29, 0x2d, 0xb3,
markrad 0:cdf462088d13 658 0xe6, 0x7c, 0x03, 0x67, 0x45, 0xfa, 0x22, 0xe7,
markrad 0:cdf462088d13 659 0xe9, 0xb7, 0x37, 0x3b },
markrad 0:cdf462088d13 660 { 0x00 },
markrad 0:cdf462088d13 661 { 0xce, 0xa7, 0x40, 0x3d, 0x4d, 0x60, 0x6b, 0x6e,
markrad 0:cdf462088d13 662 0x07, 0x4e, 0xc5, 0xd3, 0xba, 0xf3, 0x9d, 0x18 },
markrad 0:cdf462088d13 663 { 0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07,
markrad 0:cdf462088d13 664 0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, 0x42, 0x7d,
markrad 0:cdf462088d13 665 0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9,
markrad 0:cdf462088d13 666 0x75, 0x98, 0xa2, 0xbd, 0x25, 0x55, 0xd1, 0xaa,
markrad 0:cdf462088d13 667 0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d,
markrad 0:cdf462088d13 668 0xa7, 0xb0, 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38,
markrad 0:cdf462088d13 669 0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a,
markrad 0:cdf462088d13 670 0xbc, 0xc9, 0xf6, 0x62, 0x89, 0x80, 0x15, 0xad },
markrad 0:cdf462088d13 671 { 0x52, 0x2d, 0xc1, 0xf0, 0x99, 0x56, 0x7d, 0x07,
markrad 0:cdf462088d13 672 0xf4, 0x7f, 0x37, 0xa3, 0x2a, 0x84, 0x42, 0x7d,
markrad 0:cdf462088d13 673 0x64, 0x3a, 0x8c, 0xdc, 0xbf, 0xe5, 0xc0, 0xc9,
markrad 0:cdf462088d13 674 0x75, 0x98, 0xa2, 0xbd, 0x25, 0x55, 0xd1, 0xaa,
markrad 0:cdf462088d13 675 0x8c, 0xb0, 0x8e, 0x48, 0x59, 0x0d, 0xbb, 0x3d,
markrad 0:cdf462088d13 676 0xa7, 0xb0, 0x8b, 0x10, 0x56, 0x82, 0x88, 0x38,
markrad 0:cdf462088d13 677 0xc5, 0xf6, 0x1e, 0x63, 0x93, 0xba, 0x7a, 0x0a,
markrad 0:cdf462088d13 678 0xbc, 0xc9, 0xf6, 0x62 },
markrad 0:cdf462088d13 679 { 0xc3, 0x76, 0x2d, 0xf1, 0xca, 0x78, 0x7d, 0x32,
markrad 0:cdf462088d13 680 0xae, 0x47, 0xc1, 0x3b, 0xf1, 0x98, 0x44, 0xcb,
markrad 0:cdf462088d13 681 0xaf, 0x1a, 0xe1, 0x4d, 0x0b, 0x97, 0x6a, 0xfa,
markrad 0:cdf462088d13 682 0xc5, 0x2f, 0xf7, 0xd7, 0x9b, 0xba, 0x9d, 0xe0,
markrad 0:cdf462088d13 683 0xfe, 0xb5, 0x82, 0xd3, 0x39, 0x34, 0xa4, 0xf0,
markrad 0:cdf462088d13 684 0x95, 0x4c, 0xc2, 0x36, 0x3b, 0xc7, 0x3f, 0x78,
markrad 0:cdf462088d13 685 0x62, 0xac, 0x43, 0x0e, 0x64, 0xab, 0xe4, 0x99,
markrad 0:cdf462088d13 686 0xf4, 0x7c, 0x9b, 0x1f },
markrad 0:cdf462088d13 687 { 0x5a, 0x8d, 0xef, 0x2f, 0x0c, 0x9e, 0x53, 0xf1,
markrad 0:cdf462088d13 688 0xf7, 0x5d, 0x78, 0x53, 0x65, 0x9e, 0x2a, 0x20,
markrad 0:cdf462088d13 689 0xee, 0xb2, 0xb2, 0x2a, 0xaf, 0xde, 0x64, 0x19,
markrad 0:cdf462088d13 690 0xa0, 0x58, 0xab, 0x4f, 0x6f, 0x74, 0x6b, 0xf4,
markrad 0:cdf462088d13 691 0x0f, 0xc0, 0xc3, 0xb7, 0x80, 0xf2, 0x44, 0x45,
markrad 0:cdf462088d13 692 0x2d, 0xa3, 0xeb, 0xf1, 0xc5, 0xd8, 0x2c, 0xde,
markrad 0:cdf462088d13 693 0xa2, 0x41, 0x89, 0x97, 0x20, 0x0e, 0xf8, 0x2e,
markrad 0:cdf462088d13 694 0x44, 0xae, 0x7e, 0x3f },
markrad 0:cdf462088d13 695 };
markrad 0:cdf462088d13 696
markrad 0:cdf462088d13 697 static const unsigned char tag[MAX_TESTS * 3][16] =
markrad 0:cdf462088d13 698 {
markrad 0:cdf462088d13 699 { 0x58, 0xe2, 0xfc, 0xce, 0xfa, 0x7e, 0x30, 0x61,
markrad 0:cdf462088d13 700 0x36, 0x7f, 0x1d, 0x57, 0xa4, 0xe7, 0x45, 0x5a },
markrad 0:cdf462088d13 701 { 0xab, 0x6e, 0x47, 0xd4, 0x2c, 0xec, 0x13, 0xbd,
markrad 0:cdf462088d13 702 0xf5, 0x3a, 0x67, 0xb2, 0x12, 0x57, 0xbd, 0xdf },
markrad 0:cdf462088d13 703 { 0x4d, 0x5c, 0x2a, 0xf3, 0x27, 0xcd, 0x64, 0xa6,
markrad 0:cdf462088d13 704 0x2c, 0xf3, 0x5a, 0xbd, 0x2b, 0xa6, 0xfa, 0xb4 },
markrad 0:cdf462088d13 705 { 0x5b, 0xc9, 0x4f, 0xbc, 0x32, 0x21, 0xa5, 0xdb,
markrad 0:cdf462088d13 706 0x94, 0xfa, 0xe9, 0x5a, 0xe7, 0x12, 0x1a, 0x47 },
markrad 0:cdf462088d13 707 { 0x36, 0x12, 0xd2, 0xe7, 0x9e, 0x3b, 0x07, 0x85,
markrad 0:cdf462088d13 708 0x56, 0x1b, 0xe1, 0x4a, 0xac, 0xa2, 0xfc, 0xcb },
markrad 0:cdf462088d13 709 { 0x61, 0x9c, 0xc5, 0xae, 0xff, 0xfe, 0x0b, 0xfa,
markrad 0:cdf462088d13 710 0x46, 0x2a, 0xf4, 0x3c, 0x16, 0x99, 0xd0, 0x50 },
markrad 0:cdf462088d13 711 { 0xcd, 0x33, 0xb2, 0x8a, 0xc7, 0x73, 0xf7, 0x4b,
markrad 0:cdf462088d13 712 0xa0, 0x0e, 0xd1, 0xf3, 0x12, 0x57, 0x24, 0x35 },
markrad 0:cdf462088d13 713 { 0x2f, 0xf5, 0x8d, 0x80, 0x03, 0x39, 0x27, 0xab,
markrad 0:cdf462088d13 714 0x8e, 0xf4, 0xd4, 0x58, 0x75, 0x14, 0xf0, 0xfb },
markrad 0:cdf462088d13 715 { 0x99, 0x24, 0xa7, 0xc8, 0x58, 0x73, 0x36, 0xbf,
markrad 0:cdf462088d13 716 0xb1, 0x18, 0x02, 0x4d, 0xb8, 0x67, 0x4a, 0x14 },
markrad 0:cdf462088d13 717 { 0x25, 0x19, 0x49, 0x8e, 0x80, 0xf1, 0x47, 0x8f,
markrad 0:cdf462088d13 718 0x37, 0xba, 0x55, 0xbd, 0x6d, 0x27, 0x61, 0x8c },
markrad 0:cdf462088d13 719 { 0x65, 0xdc, 0xc5, 0x7f, 0xcf, 0x62, 0x3a, 0x24,
markrad 0:cdf462088d13 720 0x09, 0x4f, 0xcc, 0xa4, 0x0d, 0x35, 0x33, 0xf8 },
markrad 0:cdf462088d13 721 { 0xdc, 0xf5, 0x66, 0xff, 0x29, 0x1c, 0x25, 0xbb,
markrad 0:cdf462088d13 722 0xb8, 0x56, 0x8f, 0xc3, 0xd3, 0x76, 0xa6, 0xd9 },
markrad 0:cdf462088d13 723 { 0x53, 0x0f, 0x8a, 0xfb, 0xc7, 0x45, 0x36, 0xb9,
markrad 0:cdf462088d13 724 0xa9, 0x63, 0xb4, 0xf1, 0xc4, 0xcb, 0x73, 0x8b },
markrad 0:cdf462088d13 725 { 0xd0, 0xd1, 0xc8, 0xa7, 0x99, 0x99, 0x6b, 0xf0,
markrad 0:cdf462088d13 726 0x26, 0x5b, 0x98, 0xb5, 0xd4, 0x8a, 0xb9, 0x19 },
markrad 0:cdf462088d13 727 { 0xb0, 0x94, 0xda, 0xc5, 0xd9, 0x34, 0x71, 0xbd,
markrad 0:cdf462088d13 728 0xec, 0x1a, 0x50, 0x22, 0x70, 0xe3, 0xcc, 0x6c },
markrad 0:cdf462088d13 729 { 0x76, 0xfc, 0x6e, 0xce, 0x0f, 0x4e, 0x17, 0x68,
markrad 0:cdf462088d13 730 0xcd, 0xdf, 0x88, 0x53, 0xbb, 0x2d, 0x55, 0x1b },
markrad 0:cdf462088d13 731 { 0x3a, 0x33, 0x7d, 0xbf, 0x46, 0xa7, 0x92, 0xc4,
markrad 0:cdf462088d13 732 0x5e, 0x45, 0x49, 0x13, 0xfe, 0x2e, 0xa8, 0xf2 },
markrad 0:cdf462088d13 733 { 0xa4, 0x4a, 0x82, 0x66, 0xee, 0x1c, 0x8e, 0xb0,
markrad 0:cdf462088d13 734 0xc8, 0xb5, 0xd4, 0xcf, 0x5a, 0xe9, 0xf1, 0x9a },
markrad 0:cdf462088d13 735 };
markrad 0:cdf462088d13 736
markrad 0:cdf462088d13 737 int mbedtls_gcm_self_test( int verbose )
markrad 0:cdf462088d13 738 {
markrad 0:cdf462088d13 739 mbedtls_gcm_context ctx;
markrad 0:cdf462088d13 740 unsigned char buf[64];
markrad 0:cdf462088d13 741 unsigned char tag_buf[16];
markrad 0:cdf462088d13 742 int i, j, ret;
markrad 0:cdf462088d13 743 mbedtls_cipher_id_t cipher = MBEDTLS_CIPHER_ID_AES;
markrad 0:cdf462088d13 744
markrad 0:cdf462088d13 745 mbedtls_gcm_init( &ctx );
markrad 0:cdf462088d13 746
markrad 0:cdf462088d13 747 for( j = 0; j < 3; j++ )
markrad 0:cdf462088d13 748 {
markrad 0:cdf462088d13 749 int key_len = 128 + 64 * j;
markrad 0:cdf462088d13 750
markrad 0:cdf462088d13 751 for( i = 0; i < MAX_TESTS; i++ )
markrad 0:cdf462088d13 752 {
markrad 0:cdf462088d13 753 if( verbose != 0 )
markrad 0:cdf462088d13 754 mbedtls_printf( " AES-GCM-%3d #%d (%s): ",
markrad 0:cdf462088d13 755 key_len, i, "enc" );
markrad 0:cdf462088d13 756
markrad 0:cdf462088d13 757 mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
markrad 0:cdf462088d13 758
markrad 0:cdf462088d13 759 ret = mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_ENCRYPT,
markrad 0:cdf462088d13 760 pt_len[i],
markrad 0:cdf462088d13 761 iv[iv_index[i]], iv_len[i],
markrad 0:cdf462088d13 762 additional[add_index[i]], add_len[i],
markrad 0:cdf462088d13 763 pt[pt_index[i]], buf, 16, tag_buf );
markrad 0:cdf462088d13 764
markrad 0:cdf462088d13 765 if( ret != 0 ||
markrad 0:cdf462088d13 766 memcmp( buf, ct[j * 6 + i], pt_len[i] ) != 0 ||
markrad 0:cdf462088d13 767 memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
markrad 0:cdf462088d13 768 {
markrad 0:cdf462088d13 769 if( verbose != 0 )
markrad 0:cdf462088d13 770 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 771
markrad 0:cdf462088d13 772 return( 1 );
markrad 0:cdf462088d13 773 }
markrad 0:cdf462088d13 774
markrad 0:cdf462088d13 775 mbedtls_gcm_free( &ctx );
markrad 0:cdf462088d13 776
markrad 0:cdf462088d13 777 if( verbose != 0 )
markrad 0:cdf462088d13 778 mbedtls_printf( "passed\n" );
markrad 0:cdf462088d13 779
markrad 0:cdf462088d13 780 if( verbose != 0 )
markrad 0:cdf462088d13 781 mbedtls_printf( " AES-GCM-%3d #%d (%s): ",
markrad 0:cdf462088d13 782 key_len, i, "dec" );
markrad 0:cdf462088d13 783
markrad 0:cdf462088d13 784 mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
markrad 0:cdf462088d13 785
markrad 0:cdf462088d13 786 ret = mbedtls_gcm_crypt_and_tag( &ctx, MBEDTLS_GCM_DECRYPT,
markrad 0:cdf462088d13 787 pt_len[i],
markrad 0:cdf462088d13 788 iv[iv_index[i]], iv_len[i],
markrad 0:cdf462088d13 789 additional[add_index[i]], add_len[i],
markrad 0:cdf462088d13 790 ct[j * 6 + i], buf, 16, tag_buf );
markrad 0:cdf462088d13 791
markrad 0:cdf462088d13 792 if( ret != 0 ||
markrad 0:cdf462088d13 793 memcmp( buf, pt[pt_index[i]], pt_len[i] ) != 0 ||
markrad 0:cdf462088d13 794 memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
markrad 0:cdf462088d13 795 {
markrad 0:cdf462088d13 796 if( verbose != 0 )
markrad 0:cdf462088d13 797 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 798
markrad 0:cdf462088d13 799 return( 1 );
markrad 0:cdf462088d13 800 }
markrad 0:cdf462088d13 801
markrad 0:cdf462088d13 802 mbedtls_gcm_free( &ctx );
markrad 0:cdf462088d13 803
markrad 0:cdf462088d13 804 if( verbose != 0 )
markrad 0:cdf462088d13 805 mbedtls_printf( "passed\n" );
markrad 0:cdf462088d13 806
markrad 0:cdf462088d13 807 if( verbose != 0 )
markrad 0:cdf462088d13 808 mbedtls_printf( " AES-GCM-%3d #%d split (%s): ",
markrad 0:cdf462088d13 809 key_len, i, "enc" );
markrad 0:cdf462088d13 810
markrad 0:cdf462088d13 811 mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
markrad 0:cdf462088d13 812
markrad 0:cdf462088d13 813 ret = mbedtls_gcm_starts( &ctx, MBEDTLS_GCM_ENCRYPT,
markrad 0:cdf462088d13 814 iv[iv_index[i]], iv_len[i],
markrad 0:cdf462088d13 815 additional[add_index[i]], add_len[i] );
markrad 0:cdf462088d13 816 if( ret != 0 )
markrad 0:cdf462088d13 817 {
markrad 0:cdf462088d13 818 if( verbose != 0 )
markrad 0:cdf462088d13 819 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 820
markrad 0:cdf462088d13 821 return( 1 );
markrad 0:cdf462088d13 822 }
markrad 0:cdf462088d13 823
markrad 0:cdf462088d13 824 if( pt_len[i] > 32 )
markrad 0:cdf462088d13 825 {
markrad 0:cdf462088d13 826 size_t rest_len = pt_len[i] - 32;
markrad 0:cdf462088d13 827 ret = mbedtls_gcm_update( &ctx, 32, pt[pt_index[i]], buf );
markrad 0:cdf462088d13 828 if( ret != 0 )
markrad 0:cdf462088d13 829 {
markrad 0:cdf462088d13 830 if( verbose != 0 )
markrad 0:cdf462088d13 831 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 832
markrad 0:cdf462088d13 833 return( 1 );
markrad 0:cdf462088d13 834 }
markrad 0:cdf462088d13 835
markrad 0:cdf462088d13 836 ret = mbedtls_gcm_update( &ctx, rest_len, pt[pt_index[i]] + 32,
markrad 0:cdf462088d13 837 buf + 32 );
markrad 0:cdf462088d13 838 if( ret != 0 )
markrad 0:cdf462088d13 839 {
markrad 0:cdf462088d13 840 if( verbose != 0 )
markrad 0:cdf462088d13 841 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 842
markrad 0:cdf462088d13 843 return( 1 );
markrad 0:cdf462088d13 844 }
markrad 0:cdf462088d13 845 }
markrad 0:cdf462088d13 846 else
markrad 0:cdf462088d13 847 {
markrad 0:cdf462088d13 848 ret = mbedtls_gcm_update( &ctx, pt_len[i], pt[pt_index[i]], buf );
markrad 0:cdf462088d13 849 if( ret != 0 )
markrad 0:cdf462088d13 850 {
markrad 0:cdf462088d13 851 if( verbose != 0 )
markrad 0:cdf462088d13 852 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 853
markrad 0:cdf462088d13 854 return( 1 );
markrad 0:cdf462088d13 855 }
markrad 0:cdf462088d13 856 }
markrad 0:cdf462088d13 857
markrad 0:cdf462088d13 858 ret = mbedtls_gcm_finish( &ctx, tag_buf, 16 );
markrad 0:cdf462088d13 859 if( ret != 0 ||
markrad 0:cdf462088d13 860 memcmp( buf, ct[j * 6 + i], pt_len[i] ) != 0 ||
markrad 0:cdf462088d13 861 memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
markrad 0:cdf462088d13 862 {
markrad 0:cdf462088d13 863 if( verbose != 0 )
markrad 0:cdf462088d13 864 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 865
markrad 0:cdf462088d13 866 return( 1 );
markrad 0:cdf462088d13 867 }
markrad 0:cdf462088d13 868
markrad 0:cdf462088d13 869 mbedtls_gcm_free( &ctx );
markrad 0:cdf462088d13 870
markrad 0:cdf462088d13 871 if( verbose != 0 )
markrad 0:cdf462088d13 872 mbedtls_printf( "passed\n" );
markrad 0:cdf462088d13 873
markrad 0:cdf462088d13 874 if( verbose != 0 )
markrad 0:cdf462088d13 875 mbedtls_printf( " AES-GCM-%3d #%d split (%s): ",
markrad 0:cdf462088d13 876 key_len, i, "dec" );
markrad 0:cdf462088d13 877
markrad 0:cdf462088d13 878 mbedtls_gcm_setkey( &ctx, cipher, key[key_index[i]], key_len );
markrad 0:cdf462088d13 879
markrad 0:cdf462088d13 880 ret = mbedtls_gcm_starts( &ctx, MBEDTLS_GCM_DECRYPT,
markrad 0:cdf462088d13 881 iv[iv_index[i]], iv_len[i],
markrad 0:cdf462088d13 882 additional[add_index[i]], add_len[i] );
markrad 0:cdf462088d13 883 if( ret != 0 )
markrad 0:cdf462088d13 884 {
markrad 0:cdf462088d13 885 if( verbose != 0 )
markrad 0:cdf462088d13 886 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 887
markrad 0:cdf462088d13 888 return( 1 );
markrad 0:cdf462088d13 889 }
markrad 0:cdf462088d13 890
markrad 0:cdf462088d13 891 if( pt_len[i] > 32 )
markrad 0:cdf462088d13 892 {
markrad 0:cdf462088d13 893 size_t rest_len = pt_len[i] - 32;
markrad 0:cdf462088d13 894 ret = mbedtls_gcm_update( &ctx, 32, ct[j * 6 + i], buf );
markrad 0:cdf462088d13 895 if( ret != 0 )
markrad 0:cdf462088d13 896 {
markrad 0:cdf462088d13 897 if( verbose != 0 )
markrad 0:cdf462088d13 898 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 899
markrad 0:cdf462088d13 900 return( 1 );
markrad 0:cdf462088d13 901 }
markrad 0:cdf462088d13 902
markrad 0:cdf462088d13 903 ret = mbedtls_gcm_update( &ctx, rest_len, ct[j * 6 + i] + 32,
markrad 0:cdf462088d13 904 buf + 32 );
markrad 0:cdf462088d13 905 if( ret != 0 )
markrad 0:cdf462088d13 906 {
markrad 0:cdf462088d13 907 if( verbose != 0 )
markrad 0:cdf462088d13 908 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 909
markrad 0:cdf462088d13 910 return( 1 );
markrad 0:cdf462088d13 911 }
markrad 0:cdf462088d13 912 }
markrad 0:cdf462088d13 913 else
markrad 0:cdf462088d13 914 {
markrad 0:cdf462088d13 915 ret = mbedtls_gcm_update( &ctx, pt_len[i], ct[j * 6 + i], buf );
markrad 0:cdf462088d13 916 if( ret != 0 )
markrad 0:cdf462088d13 917 {
markrad 0:cdf462088d13 918 if( verbose != 0 )
markrad 0:cdf462088d13 919 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 920
markrad 0:cdf462088d13 921 return( 1 );
markrad 0:cdf462088d13 922 }
markrad 0:cdf462088d13 923 }
markrad 0:cdf462088d13 924
markrad 0:cdf462088d13 925 ret = mbedtls_gcm_finish( &ctx, tag_buf, 16 );
markrad 0:cdf462088d13 926 if( ret != 0 ||
markrad 0:cdf462088d13 927 memcmp( buf, pt[pt_index[i]], pt_len[i] ) != 0 ||
markrad 0:cdf462088d13 928 memcmp( tag_buf, tag[j * 6 + i], 16 ) != 0 )
markrad 0:cdf462088d13 929 {
markrad 0:cdf462088d13 930 if( verbose != 0 )
markrad 0:cdf462088d13 931 mbedtls_printf( "failed\n" );
markrad 0:cdf462088d13 932
markrad 0:cdf462088d13 933 return( 1 );
markrad 0:cdf462088d13 934 }
markrad 0:cdf462088d13 935
markrad 0:cdf462088d13 936 mbedtls_gcm_free( &ctx );
markrad 0:cdf462088d13 937
markrad 0:cdf462088d13 938 if( verbose != 0 )
markrad 0:cdf462088d13 939 mbedtls_printf( "passed\n" );
markrad 0:cdf462088d13 940
markrad 0:cdf462088d13 941 }
markrad 0:cdf462088d13 942 }
markrad 0:cdf462088d13 943
markrad 0:cdf462088d13 944 if( verbose != 0 )
markrad 0:cdf462088d13 945 mbedtls_printf( "\n" );
markrad 0:cdf462088d13 946
markrad 0:cdf462088d13 947 return( 0 );
markrad 0:cdf462088d13 948 }
markrad 0:cdf462088d13 949
markrad 0:cdf462088d13 950 #endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
markrad 0:cdf462088d13 951
markrad 0:cdf462088d13 952 #endif /* MBEDTLS_GCM_C */