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