Coverage Report

Created: 2024-11-21 07:03

/src/mbedtls/library/cipher.c
Line
Count
Source (jump to first uncovered line)
1
/**
2
 * \file cipher.c
3
 *
4
 * \brief Generic cipher wrapper for Mbed TLS
5
 *
6
 * \author Adriaan de Jong <dejong@fox-it.com>
7
 *
8
 *  Copyright The Mbed TLS Contributors
9
 *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
10
 */
11
12
#include "common.h"
13
14
#if defined(MBEDTLS_CIPHER_C)
15
16
#include "mbedtls/cipher.h"
17
#include "cipher_wrap.h"
18
#include "mbedtls/platform_util.h"
19
#include "mbedtls/error.h"
20
#include "mbedtls/constant_time.h"
21
#include "constant_time_internal.h"
22
23
#include <stdlib.h>
24
#include <string.h>
25
26
#if defined(MBEDTLS_CHACHAPOLY_C)
27
#include "mbedtls/chachapoly.h"
28
#endif
29
30
#if defined(MBEDTLS_GCM_C)
31
#include "mbedtls/gcm.h"
32
#endif
33
34
#if defined(MBEDTLS_CCM_C)
35
#include "mbedtls/ccm.h"
36
#endif
37
38
#if defined(MBEDTLS_CHACHA20_C)
39
#include "mbedtls/chacha20.h"
40
#endif
41
42
#if defined(MBEDTLS_CMAC_C)
43
#include "mbedtls/cmac.h"
44
#endif
45
46
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
47
#include "psa/crypto.h"
48
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
49
50
#if defined(MBEDTLS_NIST_KW_C)
51
#include "mbedtls/nist_kw.h"
52
#endif
53
54
#include "mbedtls/platform.h"
55
56
static int supported_init = 0;
57
58
static inline const mbedtls_cipher_base_t *mbedtls_cipher_get_base(
59
    const mbedtls_cipher_info_t *info)
60
14.9k
{
61
14.9k
    return mbedtls_cipher_base_lookup_table[info->base_idx];
62
14.9k
}
63
64
const int *mbedtls_cipher_list(void)
65
0
{
66
0
    const mbedtls_cipher_definition_t *def;
67
0
    int *type;
68
69
0
    if (!supported_init) {
70
0
        def = mbedtls_cipher_definitions;
71
0
        type = mbedtls_cipher_supported;
72
73
0
        while (def->type != 0) {
74
0
            *type++ = (*def++).type;
75
0
        }
76
77
0
        *type = 0;
78
79
0
        supported_init = 1;
80
0
    }
81
82
0
    return mbedtls_cipher_supported;
83
0
}
84
85
const mbedtls_cipher_info_t *mbedtls_cipher_info_from_type(
86
    const mbedtls_cipher_type_t cipher_type)
87
1.71k
{
88
1.71k
    const mbedtls_cipher_definition_t *def;
89
90
61.3k
    for (def = mbedtls_cipher_definitions; def->info != NULL; def++) {
91
61.3k
        if (def->type == cipher_type) {
92
1.71k
            return def->info;
93
1.71k
        }
94
61.3k
    }
95
96
0
    return NULL;
97
1.71k
}
98
99
const mbedtls_cipher_info_t *mbedtls_cipher_info_from_string(
100
    const char *cipher_name)
101
0
{
102
0
    const mbedtls_cipher_definition_t *def;
103
104
0
    if (NULL == cipher_name) {
105
0
        return NULL;
106
0
    }
107
108
0
    for (def = mbedtls_cipher_definitions; def->info != NULL; def++) {
109
0
        if (!strcmp(def->info->name, cipher_name)) {
110
0
            return def->info;
111
0
        }
112
0
    }
113
114
0
    return NULL;
115
0
}
116
117
const mbedtls_cipher_info_t *mbedtls_cipher_info_from_values(
118
    const mbedtls_cipher_id_t cipher_id,
119
    int key_bitlen,
120
    const mbedtls_cipher_mode_t mode)
121
267
{
122
267
    const mbedtls_cipher_definition_t *def;
123
124
5.17k
    for (def = mbedtls_cipher_definitions; def->info != NULL; def++) {
125
5.17k
        if (mbedtls_cipher_get_base(def->info)->cipher == cipher_id &&
126
5.17k
            mbedtls_cipher_info_get_key_bitlen(def->info) == (unsigned) key_bitlen &&
127
5.17k
            def->info->mode == mode) {
128
267
            return def->info;
129
267
        }
130
5.17k
    }
131
132
0
    return NULL;
133
267
}
134
135
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
136
static inline psa_key_type_t mbedtls_psa_translate_cipher_type(
137
    mbedtls_cipher_type_t cipher)
138
{
139
    switch (cipher) {
140
        case MBEDTLS_CIPHER_AES_128_CCM:
141
        case MBEDTLS_CIPHER_AES_192_CCM:
142
        case MBEDTLS_CIPHER_AES_256_CCM:
143
        case MBEDTLS_CIPHER_AES_128_CCM_STAR_NO_TAG:
144
        case MBEDTLS_CIPHER_AES_192_CCM_STAR_NO_TAG:
145
        case MBEDTLS_CIPHER_AES_256_CCM_STAR_NO_TAG:
146
        case MBEDTLS_CIPHER_AES_128_GCM:
147
        case MBEDTLS_CIPHER_AES_192_GCM:
148
        case MBEDTLS_CIPHER_AES_256_GCM:
149
        case MBEDTLS_CIPHER_AES_128_CBC:
150
        case MBEDTLS_CIPHER_AES_192_CBC:
151
        case MBEDTLS_CIPHER_AES_256_CBC:
152
        case MBEDTLS_CIPHER_AES_128_ECB:
153
        case MBEDTLS_CIPHER_AES_192_ECB:
154
        case MBEDTLS_CIPHER_AES_256_ECB:
155
            return PSA_KEY_TYPE_AES;
156
157
        /* ARIA not yet supported in PSA. */
158
        /* case MBEDTLS_CIPHER_ARIA_128_CCM:
159
           case MBEDTLS_CIPHER_ARIA_192_CCM:
160
           case MBEDTLS_CIPHER_ARIA_256_CCM:
161
           case MBEDTLS_CIPHER_ARIA_128_CCM_STAR_NO_TAG:
162
           case MBEDTLS_CIPHER_ARIA_192_CCM_STAR_NO_TAG:
163
           case MBEDTLS_CIPHER_ARIA_256_CCM_STAR_NO_TAG:
164
           case MBEDTLS_CIPHER_ARIA_128_GCM:
165
           case MBEDTLS_CIPHER_ARIA_192_GCM:
166
           case MBEDTLS_CIPHER_ARIA_256_GCM:
167
           case MBEDTLS_CIPHER_ARIA_128_CBC:
168
           case MBEDTLS_CIPHER_ARIA_192_CBC:
169
           case MBEDTLS_CIPHER_ARIA_256_CBC:
170
               return( PSA_KEY_TYPE_ARIA ); */
171
172
        default:
173
            return 0;
174
    }
175
}
176
177
static inline psa_algorithm_t mbedtls_psa_translate_cipher_mode(
178
    mbedtls_cipher_mode_t mode, size_t taglen)
179
{
180
    switch (mode) {
181
        case MBEDTLS_MODE_ECB:
182
            return PSA_ALG_ECB_NO_PADDING;
183
        case MBEDTLS_MODE_GCM:
184
            return PSA_ALG_AEAD_WITH_SHORTENED_TAG(PSA_ALG_GCM, taglen);
185
        case MBEDTLS_MODE_CCM:
186
            return PSA_ALG_AEAD_WITH_SHORTENED_TAG(PSA_ALG_CCM, taglen);
187
        case MBEDTLS_MODE_CCM_STAR_NO_TAG:
188
            return PSA_ALG_CCM_STAR_NO_TAG;
189
        case MBEDTLS_MODE_CBC:
190
            if (taglen == 0) {
191
                return PSA_ALG_CBC_NO_PADDING;
192
            } else {
193
                return 0;
194
            }
195
        default:
196
            return 0;
197
    }
198
}
199
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
200
201
void mbedtls_cipher_init(mbedtls_cipher_context_t *ctx)
202
1.73k
{
203
1.73k
    memset(ctx, 0, sizeof(mbedtls_cipher_context_t));
204
1.73k
}
205
206
void mbedtls_cipher_free(mbedtls_cipher_context_t *ctx)
207
2.37k
{
208
2.37k
    if (ctx == NULL) {
209
0
        return;
210
0
    }
211
212
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
213
    if (ctx->psa_enabled == 1) {
214
        if (ctx->cipher_ctx != NULL) {
215
            mbedtls_cipher_context_psa * const cipher_psa =
216
                (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
217
218
            if (cipher_psa->slot_state == MBEDTLS_CIPHER_PSA_KEY_OWNED) {
219
                /* xxx_free() doesn't allow to return failures. */
220
                (void) psa_destroy_key(cipher_psa->slot);
221
            }
222
223
            mbedtls_zeroize_and_free(cipher_psa, sizeof(*cipher_psa));
224
        }
225
226
        mbedtls_platform_zeroize(ctx, sizeof(mbedtls_cipher_context_t));
227
        return;
228
    }
229
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
230
231
2.37k
#if defined(MBEDTLS_CMAC_C)
232
2.37k
    if (ctx->cmac_ctx) {
233
2
        mbedtls_zeroize_and_free(ctx->cmac_ctx,
234
2
                                 sizeof(mbedtls_cmac_context_t));
235
2
    }
236
2.37k
#endif
237
238
2.37k
    if (ctx->cipher_ctx) {
239
1.24k
        mbedtls_cipher_get_base(ctx->cipher_info)->ctx_free_func(ctx->cipher_ctx);
240
1.24k
    }
241
242
2.37k
    mbedtls_platform_zeroize(ctx, sizeof(mbedtls_cipher_context_t));
243
2.37k
}
244
245
int mbedtls_cipher_setup(mbedtls_cipher_context_t *ctx,
246
                         const mbedtls_cipher_info_t *cipher_info)
247
1.24k
{
248
1.24k
    if (cipher_info == NULL) {
249
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
250
0
    }
251
252
1.24k
    memset(ctx, 0, sizeof(mbedtls_cipher_context_t));
253
254
1.24k
    if (mbedtls_cipher_get_base(cipher_info)->ctx_alloc_func != NULL) {
255
1.24k
        ctx->cipher_ctx = mbedtls_cipher_get_base(cipher_info)->ctx_alloc_func();
256
1.24k
        if (ctx->cipher_ctx == NULL) {
257
0
            return MBEDTLS_ERR_CIPHER_ALLOC_FAILED;
258
0
        }
259
1.24k
    }
260
261
1.24k
    ctx->cipher_info = cipher_info;
262
263
1.24k
    return 0;
264
1.24k
}
265
266
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
267
int mbedtls_cipher_setup_psa(mbedtls_cipher_context_t *ctx,
268
                             const mbedtls_cipher_info_t *cipher_info,
269
                             size_t taglen)
270
{
271
    psa_algorithm_t alg;
272
    mbedtls_cipher_context_psa *cipher_psa;
273
274
    if (NULL == cipher_info || NULL == ctx) {
275
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
276
    }
277
278
    /* Check that the underlying cipher mode and cipher type are
279
     * supported by the underlying PSA Crypto implementation. */
280
    alg = mbedtls_psa_translate_cipher_mode(((mbedtls_cipher_mode_t) cipher_info->mode), taglen);
281
    if (alg == 0) {
282
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
283
    }
284
    if (mbedtls_psa_translate_cipher_type(((mbedtls_cipher_type_t) cipher_info->type)) == 0) {
285
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
286
    }
287
288
    memset(ctx, 0, sizeof(mbedtls_cipher_context_t));
289
290
    cipher_psa = mbedtls_calloc(1, sizeof(mbedtls_cipher_context_psa));
291
    if (cipher_psa == NULL) {
292
        return MBEDTLS_ERR_CIPHER_ALLOC_FAILED;
293
    }
294
    cipher_psa->alg  = alg;
295
    ctx->cipher_ctx  = cipher_psa;
296
    ctx->cipher_info = cipher_info;
297
    ctx->psa_enabled = 1;
298
    return 0;
299
}
300
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
301
302
int mbedtls_cipher_setkey(mbedtls_cipher_context_t *ctx,
303
                          const unsigned char *key,
304
                          int key_bitlen,
305
                          const mbedtls_operation_t operation)
306
1.24k
{
307
1.24k
    if (operation != MBEDTLS_ENCRYPT && operation != MBEDTLS_DECRYPT) {
308
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
309
0
    }
310
1.24k
    if (ctx->cipher_info == NULL) {
311
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
312
0
    }
313
#if defined(MBEDTLS_BLOCK_CIPHER_NO_DECRYPT)
314
    if (MBEDTLS_MODE_ECB == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) &&
315
        MBEDTLS_DECRYPT == operation) {
316
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
317
    }
318
#endif
319
320
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
321
    if (ctx->psa_enabled == 1) {
322
        mbedtls_cipher_context_psa * const cipher_psa =
323
            (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
324
325
        size_t const key_bytelen = ((size_t) key_bitlen + 7) / 8;
326
327
        psa_status_t status;
328
        psa_key_type_t key_type;
329
        psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
330
331
        /* PSA Crypto API only accepts byte-aligned keys. */
332
        if (key_bitlen % 8 != 0) {
333
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
334
        }
335
336
        /* Don't allow keys to be set multiple times. */
337
        if (cipher_psa->slot_state != MBEDTLS_CIPHER_PSA_KEY_UNSET) {
338
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
339
        }
340
341
        key_type = mbedtls_psa_translate_cipher_type(
342
            ((mbedtls_cipher_type_t) ctx->cipher_info->type));
343
        if (key_type == 0) {
344
            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
345
        }
346
        psa_set_key_type(&attributes, key_type);
347
348
        /* Mbed TLS' cipher layer doesn't enforce the mode of operation
349
         * (encrypt vs. decrypt): it is possible to setup a key for encryption
350
         * and use it for AEAD decryption. Until tests relying on this
351
         * are changed, allow any usage in PSA. */
352
        psa_set_key_usage_flags(&attributes,
353
                                PSA_KEY_USAGE_ENCRYPT | PSA_KEY_USAGE_DECRYPT);
354
        psa_set_key_algorithm(&attributes, cipher_psa->alg);
355
356
        status = psa_import_key(&attributes, key, key_bytelen,
357
                                &cipher_psa->slot);
358
        switch (status) {
359
            case PSA_SUCCESS:
360
                break;
361
            case PSA_ERROR_INSUFFICIENT_MEMORY:
362
                return MBEDTLS_ERR_CIPHER_ALLOC_FAILED;
363
            case PSA_ERROR_NOT_SUPPORTED:
364
                return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
365
            default:
366
                return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
367
        }
368
        /* Indicate that we own the key slot and need to
369
         * destroy it in mbedtls_cipher_free(). */
370
        cipher_psa->slot_state = MBEDTLS_CIPHER_PSA_KEY_OWNED;
371
372
        ctx->key_bitlen = key_bitlen;
373
        ctx->operation = operation;
374
        return 0;
375
    }
376
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
377
378
1.24k
    if ((ctx->cipher_info->flags & MBEDTLS_CIPHER_VARIABLE_KEY_LEN) == 0 &&
379
1.24k
        (int) mbedtls_cipher_info_get_key_bitlen(ctx->cipher_info) != key_bitlen) {
380
455
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
381
455
    }
382
383
791
    ctx->key_bitlen = key_bitlen;
384
791
    ctx->operation = operation;
385
386
791
#if !defined(MBEDTLS_BLOCK_CIPHER_NO_DECRYPT)
387
    /*
388
     * For OFB, CFB and CTR mode always use the encryption key schedule
389
     */
390
791
    if (MBEDTLS_ENCRYPT == operation ||
391
791
        MBEDTLS_MODE_CFB == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) ||
392
791
        MBEDTLS_MODE_OFB == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) ||
393
791
        MBEDTLS_MODE_CTR == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
394
531
        return mbedtls_cipher_get_base(ctx->cipher_info)->setkey_enc_func(ctx->cipher_ctx, key,
395
531
                                                                          ctx->key_bitlen);
396
531
    }
397
398
260
    if (MBEDTLS_DECRYPT == operation) {
399
260
        return mbedtls_cipher_get_base(ctx->cipher_info)->setkey_dec_func(ctx->cipher_ctx, key,
400
260
                                                                          ctx->key_bitlen);
401
260
    }
402
#else
403
    if (operation == MBEDTLS_ENCRYPT || operation == MBEDTLS_DECRYPT) {
404
        return mbedtls_cipher_get_base(ctx->cipher_info)->setkey_enc_func(ctx->cipher_ctx, key,
405
                                                                          ctx->key_bitlen);
406
    }
407
#endif
408
409
0
    return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
410
260
}
411
412
int mbedtls_cipher_set_iv(mbedtls_cipher_context_t *ctx,
413
                          const unsigned char *iv,
414
                          size_t iv_len)
415
227
{
416
227
    size_t actual_iv_size;
417
418
227
    if (ctx->cipher_info == NULL) {
419
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
420
0
    }
421
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
422
    if (ctx->psa_enabled == 1) {
423
        /* While PSA Crypto has an API for multipart
424
         * operations, we currently don't make it
425
         * accessible through the cipher layer. */
426
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
427
    }
428
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
429
430
    /* avoid buffer overflow in ctx->iv */
431
227
    if (iv_len > MBEDTLS_MAX_IV_LENGTH) {
432
24
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
433
24
    }
434
435
203
    if ((ctx->cipher_info->flags & MBEDTLS_CIPHER_VARIABLE_IV_LEN) != 0) {
436
49
        actual_iv_size = iv_len;
437
154
    } else {
438
154
        actual_iv_size = mbedtls_cipher_info_get_iv_size(ctx->cipher_info);
439
440
        /* avoid reading past the end of input buffer */
441
154
        if (actual_iv_size > iv_len) {
442
9
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
443
9
        }
444
154
    }
445
446
194
#if defined(MBEDTLS_CHACHA20_C)
447
194
    if (((mbedtls_cipher_type_t) ctx->cipher_info->type) == MBEDTLS_CIPHER_CHACHA20) {
448
        /* Even though the actual_iv_size is overwritten with a correct value
449
         * of 12 from the cipher info, return an error to indicate that
450
         * the input iv_len is wrong. */
451
0
        if (iv_len != 12) {
452
0
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
453
0
        }
454
455
0
        if (0 != mbedtls_chacha20_starts((mbedtls_chacha20_context *) ctx->cipher_ctx,
456
0
                                         iv,
457
0
                                         0U)) {   /* Initial counter value */
458
0
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
459
0
        }
460
0
    }
461
194
#if defined(MBEDTLS_CHACHAPOLY_C)
462
194
    if (((mbedtls_cipher_type_t) ctx->cipher_info->type) == MBEDTLS_CIPHER_CHACHA20_POLY1305 &&
463
194
        iv_len != 12) {
464
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
465
0
    }
466
194
#endif
467
194
#endif
468
469
194
#if defined(MBEDTLS_GCM_C)
470
194
    if (MBEDTLS_MODE_GCM == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
471
45
        return mbedtls_gcm_starts((mbedtls_gcm_context *) ctx->cipher_ctx,
472
45
                                  ctx->operation,
473
45
                                  iv, iv_len);
474
45
    }
475
149
#endif
476
477
149
#if defined(MBEDTLS_CCM_C)
478
149
    if (MBEDTLS_MODE_CCM_STAR_NO_TAG == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
479
2
        int set_lengths_result;
480
2
        int ccm_star_mode;
481
482
2
        set_lengths_result = mbedtls_ccm_set_lengths(
483
2
            (mbedtls_ccm_context *) ctx->cipher_ctx,
484
2
            0, 0, 0);
485
2
        if (set_lengths_result != 0) {
486
0
            return set_lengths_result;
487
0
        }
488
489
2
        if (ctx->operation == MBEDTLS_DECRYPT) {
490
2
            ccm_star_mode = MBEDTLS_CCM_STAR_DECRYPT;
491
2
        } else if (ctx->operation == MBEDTLS_ENCRYPT) {
492
0
            ccm_star_mode = MBEDTLS_CCM_STAR_ENCRYPT;
493
0
        } else {
494
0
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
495
0
        }
496
497
2
        return mbedtls_ccm_starts((mbedtls_ccm_context *) ctx->cipher_ctx,
498
2
                                  ccm_star_mode,
499
2
                                  iv, iv_len);
500
2
    }
501
147
#endif
502
503
147
    if (actual_iv_size != 0) {
504
124
        memcpy(ctx->iv, iv, actual_iv_size);
505
124
        ctx->iv_size = actual_iv_size;
506
124
    }
507
508
147
    return 0;
509
149
}
510
511
int mbedtls_cipher_reset(mbedtls_cipher_context_t *ctx)
512
491
{
513
491
    if (ctx->cipher_info == NULL) {
514
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
515
0
    }
516
517
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
518
    if (ctx->psa_enabled == 1) {
519
        /* We don't support resetting PSA-based
520
         * cipher contexts, yet. */
521
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
522
    }
523
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
524
525
491
    ctx->unprocessed_len = 0;
526
527
491
    return 0;
528
491
}
529
530
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
531
int mbedtls_cipher_update_ad(mbedtls_cipher_context_t *ctx,
532
                             const unsigned char *ad, size_t ad_len)
533
171
{
534
171
    if (ctx->cipher_info == NULL) {
535
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
536
0
    }
537
538
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
539
    if (ctx->psa_enabled == 1) {
540
        /* While PSA Crypto has an API for multipart
541
         * operations, we currently don't make it
542
         * accessible through the cipher layer. */
543
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
544
    }
545
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
546
547
171
#if defined(MBEDTLS_GCM_C)
548
171
    if (MBEDTLS_MODE_GCM == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
549
45
        return mbedtls_gcm_update_ad((mbedtls_gcm_context *) ctx->cipher_ctx,
550
45
                                     ad, ad_len);
551
45
    }
552
126
#endif
553
554
126
#if defined(MBEDTLS_CHACHAPOLY_C)
555
126
    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ((mbedtls_cipher_type_t) ctx->cipher_info->type)) {
556
8
        int result;
557
8
        mbedtls_chachapoly_mode_t mode;
558
559
8
        mode = (ctx->operation == MBEDTLS_ENCRYPT)
560
8
                ? MBEDTLS_CHACHAPOLY_ENCRYPT
561
8
                : MBEDTLS_CHACHAPOLY_DECRYPT;
562
563
8
        result = mbedtls_chachapoly_starts((mbedtls_chachapoly_context *) ctx->cipher_ctx,
564
8
                                           ctx->iv,
565
8
                                           mode);
566
8
        if (result != 0) {
567
0
            return result;
568
0
        }
569
570
8
        return mbedtls_chachapoly_update_aad((mbedtls_chachapoly_context *) ctx->cipher_ctx,
571
8
                                             ad, ad_len);
572
8
    }
573
118
#endif
574
575
118
    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
576
126
}
577
#endif /* MBEDTLS_GCM_C || MBEDTLS_CHACHAPOLY_C */
578
579
int mbedtls_cipher_update(mbedtls_cipher_context_t *ctx, const unsigned char *input,
580
                          size_t ilen, unsigned char *output, size_t *olen)
581
5.51k
{
582
5.51k
    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
583
5.51k
    size_t block_size;
584
585
5.51k
    if (ctx->cipher_info == NULL) {
586
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
587
0
    }
588
589
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
590
    if (ctx->psa_enabled == 1) {
591
        /* While PSA Crypto has an API for multipart
592
         * operations, we currently don't make it
593
         * accessible through the cipher layer. */
594
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
595
    }
596
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
597
598
5.51k
    *olen = 0;
599
5.51k
    block_size = mbedtls_cipher_get_block_size(ctx);
600
5.51k
    if (0 == block_size) {
601
0
        return MBEDTLS_ERR_CIPHER_INVALID_CONTEXT;
602
0
    }
603
604
5.51k
    if (((mbedtls_cipher_mode_t) ctx->cipher_info->mode) == MBEDTLS_MODE_ECB) {
605
5.17k
        if (ilen != block_size) {
606
0
            return MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED;
607
0
        }
608
609
5.17k
        *olen = ilen;
610
611
5.17k
        if (0 != (ret = mbedtls_cipher_get_base(ctx->cipher_info)->ecb_func(ctx->cipher_ctx,
612
5.17k
                                                                            ctx->operation, input,
613
5.17k
                                                                            output))) {
614
0
            return ret;
615
0
        }
616
617
5.17k
        return 0;
618
5.17k
    }
619
620
337
#if defined(MBEDTLS_GCM_C)
621
337
    if (((mbedtls_cipher_mode_t) ctx->cipher_info->mode) == MBEDTLS_MODE_GCM) {
622
262
        return mbedtls_gcm_update((mbedtls_gcm_context *) ctx->cipher_ctx,
623
262
                                  input, ilen,
624
262
                                  output, ilen, olen);
625
262
    }
626
75
#endif
627
628
75
#if defined(MBEDTLS_CCM_C)
629
75
    if (((mbedtls_cipher_mode_t) ctx->cipher_info->mode) == MBEDTLS_MODE_CCM_STAR_NO_TAG) {
630
2
        return mbedtls_ccm_update((mbedtls_ccm_context *) ctx->cipher_ctx,
631
2
                                  input, ilen,
632
2
                                  output, ilen, olen);
633
2
    }
634
73
#endif
635
636
73
#if defined(MBEDTLS_CHACHAPOLY_C)
637
73
    if (((mbedtls_cipher_type_t) ctx->cipher_info->type) == MBEDTLS_CIPHER_CHACHA20_POLY1305) {
638
8
        *olen = ilen;
639
8
        return mbedtls_chachapoly_update((mbedtls_chachapoly_context *) ctx->cipher_ctx,
640
8
                                         ilen, input, output);
641
8
    }
642
65
#endif
643
644
65
    if (input == output &&
645
65
        (ctx->unprocessed_len != 0 || ilen % block_size)) {
646
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
647
0
    }
648
649
65
#if defined(MBEDTLS_CIPHER_MODE_CBC)
650
65
    if (((mbedtls_cipher_mode_t) ctx->cipher_info->mode) == MBEDTLS_MODE_CBC) {
651
12
        size_t copy_len = 0;
652
653
        /*
654
         * If there is not enough data for a full block, cache it.
655
         */
656
12
        if ((ctx->operation == MBEDTLS_DECRYPT && NULL != ctx->add_padding &&
657
12
             ilen <= block_size - ctx->unprocessed_len) ||
658
12
            (ctx->operation == MBEDTLS_DECRYPT && NULL == ctx->add_padding &&
659
8
             ilen < block_size - ctx->unprocessed_len) ||
660
12
            (ctx->operation == MBEDTLS_ENCRYPT &&
661
8
             ilen < block_size - ctx->unprocessed_len)) {
662
7
            memcpy(&(ctx->unprocessed_data[ctx->unprocessed_len]), input,
663
7
                   ilen);
664
665
7
            ctx->unprocessed_len += ilen;
666
7
            return 0;
667
7
        }
668
669
        /*
670
         * Process cached data first
671
         */
672
5
        if (0 != ctx->unprocessed_len) {
673
2
            copy_len = block_size - ctx->unprocessed_len;
674
675
2
            memcpy(&(ctx->unprocessed_data[ctx->unprocessed_len]), input,
676
2
                   copy_len);
677
678
2
            if (0 != (ret = mbedtls_cipher_get_base(ctx->cipher_info)->cbc_func(ctx->cipher_ctx,
679
2
                                                                                ctx->operation,
680
2
                                                                                block_size, ctx->iv,
681
2
                                                                                ctx->
682
2
                                                                                unprocessed_data,
683
2
                                                                                output))) {
684
0
                return ret;
685
0
            }
686
687
2
            *olen += block_size;
688
2
            output += block_size;
689
2
            ctx->unprocessed_len = 0;
690
691
2
            input += copy_len;
692
2
            ilen -= copy_len;
693
2
        }
694
695
        /*
696
         * Cache final, incomplete block
697
         */
698
5
        if (0 != ilen) {
699
            /* Encryption: only cache partial blocks
700
             * Decryption w/ padding: always keep at least one whole block
701
             * Decryption w/o padding: only cache partial blocks
702
             */
703
4
            copy_len = ilen % block_size;
704
4
            if (copy_len == 0 &&
705
4
                ctx->operation == MBEDTLS_DECRYPT &&
706
4
                NULL != ctx->add_padding) {
707
3
                copy_len = block_size;
708
3
            }
709
710
4
            memcpy(ctx->unprocessed_data, &(input[ilen - copy_len]),
711
4
                   copy_len);
712
713
4
            ctx->unprocessed_len += copy_len;
714
4
            ilen -= copy_len;
715
4
        }
716
717
        /*
718
         * Process remaining full blocks
719
         */
720
5
        if (ilen) {
721
3
            if (0 != (ret = mbedtls_cipher_get_base(ctx->cipher_info)->cbc_func(ctx->cipher_ctx,
722
3
                                                                                ctx->operation,
723
3
                                                                                ilen, ctx->iv,
724
3
                                                                                input,
725
3
                                                                                output))) {
726
0
                return ret;
727
0
            }
728
729
3
            *olen += ilen;
730
3
        }
731
732
5
        return 0;
733
5
    }
734
53
#endif /* MBEDTLS_CIPHER_MODE_CBC */
735
736
53
#if defined(MBEDTLS_CIPHER_MODE_CFB)
737
53
    if (((mbedtls_cipher_mode_t) ctx->cipher_info->mode) == MBEDTLS_MODE_CFB) {
738
4
        if (0 != (ret = mbedtls_cipher_get_base(ctx->cipher_info)->cfb_func(ctx->cipher_ctx,
739
4
                                                                            ctx->operation, ilen,
740
4
                                                                            &ctx->unprocessed_len,
741
4
                                                                            ctx->iv,
742
4
                                                                            input, output))) {
743
0
            return ret;
744
0
        }
745
746
4
        *olen = ilen;
747
748
4
        return 0;
749
4
    }
750
49
#endif /* MBEDTLS_CIPHER_MODE_CFB */
751
752
49
#if defined(MBEDTLS_CIPHER_MODE_OFB)
753
49
    if (((mbedtls_cipher_mode_t) ctx->cipher_info->mode) == MBEDTLS_MODE_OFB) {
754
38
        if (0 != (ret = mbedtls_cipher_get_base(ctx->cipher_info)->ofb_func(ctx->cipher_ctx,
755
38
                                                                            ilen,
756
38
                                                                            &ctx->unprocessed_len,
757
38
                                                                            ctx->iv,
758
38
                                                                            input, output))) {
759
0
            return ret;
760
0
        }
761
762
38
        *olen = ilen;
763
764
38
        return 0;
765
38
    }
766
11
#endif /* MBEDTLS_CIPHER_MODE_OFB */
767
768
11
#if defined(MBEDTLS_CIPHER_MODE_CTR)
769
11
    if (((mbedtls_cipher_mode_t) ctx->cipher_info->mode) == MBEDTLS_MODE_CTR) {
770
11
        if (0 != (ret = mbedtls_cipher_get_base(ctx->cipher_info)->ctr_func(ctx->cipher_ctx,
771
11
                                                                            ilen,
772
11
                                                                            &ctx->unprocessed_len,
773
11
                                                                            ctx->iv,
774
11
                                                                            ctx->unprocessed_data,
775
11
                                                                            input, output))) {
776
0
            return ret;
777
0
        }
778
779
11
        *olen = ilen;
780
781
11
        return 0;
782
11
    }
783
0
#endif /* MBEDTLS_CIPHER_MODE_CTR */
784
785
0
#if defined(MBEDTLS_CIPHER_MODE_XTS)
786
0
    if (((mbedtls_cipher_mode_t) ctx->cipher_info->mode) == MBEDTLS_MODE_XTS) {
787
0
        if (ctx->unprocessed_len > 0) {
788
            /* We can only process an entire data unit at a time. */
789
0
            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
790
0
        }
791
792
0
        ret = mbedtls_cipher_get_base(ctx->cipher_info)->xts_func(ctx->cipher_ctx,
793
0
                                                                  ctx->operation,
794
0
                                                                  ilen,
795
0
                                                                  ctx->iv,
796
0
                                                                  input,
797
0
                                                                  output);
798
0
        if (ret != 0) {
799
0
            return ret;
800
0
        }
801
802
0
        *olen = ilen;
803
804
0
        return 0;
805
0
    }
806
0
#endif /* MBEDTLS_CIPHER_MODE_XTS */
807
808
0
#if defined(MBEDTLS_CIPHER_MODE_STREAM)
809
0
    if (((mbedtls_cipher_mode_t) ctx->cipher_info->mode) == MBEDTLS_MODE_STREAM) {
810
0
        if (0 != (ret = mbedtls_cipher_get_base(ctx->cipher_info)->stream_func(ctx->cipher_ctx,
811
0
                                                                               ilen, input,
812
0
                                                                               output))) {
813
0
            return ret;
814
0
        }
815
816
0
        *olen = ilen;
817
818
0
        return 0;
819
0
    }
820
0
#endif /* MBEDTLS_CIPHER_MODE_STREAM */
821
822
0
    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
823
0
}
824
825
#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
826
#if defined(MBEDTLS_CIPHER_PADDING_PKCS7)
827
/*
828
 * PKCS7 (and PKCS5) padding: fill with ll bytes, with ll = padding_len
829
 */
830
static void add_pkcs_padding(unsigned char *output, size_t output_len,
831
                             size_t data_len)
832
1
{
833
1
    size_t padding_len = output_len - data_len;
834
1
    unsigned char i;
835
836
17
    for (i = 0; i < padding_len; i++) {
837
16
        output[data_len + i] = (unsigned char) padding_len;
838
16
    }
839
1
}
840
841
static int get_pkcs_padding(unsigned char *input, size_t input_len,
842
                            size_t *data_len)
843
4
{
844
4
    size_t i, pad_idx;
845
4
    unsigned char padding_len;
846
847
4
    if (NULL == input || NULL == data_len) {
848
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
849
0
    }
850
851
4
    padding_len = input[input_len - 1];
852
4
    if (padding_len == 0 || padding_len > input_len) {
853
3
        return MBEDTLS_ERR_CIPHER_INVALID_PADDING;
854
3
    }
855
1
    *data_len = input_len - padding_len;
856
857
1
    mbedtls_ct_condition_t bad = mbedtls_ct_uint_gt(padding_len, input_len);
858
1
    bad = mbedtls_ct_bool_or(bad, mbedtls_ct_uint_eq(padding_len, 0));
859
860
    /* The number of bytes checked must be independent of padding_len,
861
     * so pick input_len, which is usually 8 or 16 (one block) */
862
1
    pad_idx = input_len - padding_len;
863
9
    for (i = 0; i < input_len; i++) {
864
8
        mbedtls_ct_condition_t in_padding = mbedtls_ct_uint_ge(i, pad_idx);
865
8
        mbedtls_ct_condition_t different  = mbedtls_ct_uint_ne(input[i], padding_len);
866
8
        bad = mbedtls_ct_bool_or(bad, mbedtls_ct_bool_and(in_padding, different));
867
8
    }
868
869
1
    return mbedtls_ct_error_if_else_0(bad, MBEDTLS_ERR_CIPHER_INVALID_PADDING);
870
4
}
871
#endif /* MBEDTLS_CIPHER_PADDING_PKCS7 */
872
873
#if defined(MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS)
874
/*
875
 * One and zeros padding: fill with 80 00 ... 00
876
 */
877
static void add_one_and_zeros_padding(unsigned char *output,
878
                                      size_t output_len, size_t data_len)
879
0
{
880
0
    size_t padding_len = output_len - data_len;
881
0
    unsigned char i = 0;
882
883
0
    output[data_len] = 0x80;
884
0
    for (i = 1; i < padding_len; i++) {
885
0
        output[data_len + i] = 0x00;
886
0
    }
887
0
}
888
889
static int get_one_and_zeros_padding(unsigned char *input, size_t input_len,
890
                                     size_t *data_len)
891
0
{
892
0
    if (NULL == input || NULL == data_len) {
893
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
894
0
    }
895
896
0
    mbedtls_ct_condition_t in_padding = MBEDTLS_CT_TRUE;
897
0
    mbedtls_ct_condition_t bad = MBEDTLS_CT_TRUE;
898
899
0
    *data_len = 0;
900
901
0
    for (ptrdiff_t i = (ptrdiff_t) (input_len) - 1; i >= 0; i--) {
902
0
        mbedtls_ct_condition_t is_nonzero = mbedtls_ct_bool(input[i]);
903
904
0
        mbedtls_ct_condition_t hit_first_nonzero = mbedtls_ct_bool_and(is_nonzero, in_padding);
905
906
0
        *data_len = mbedtls_ct_size_if(hit_first_nonzero, i, *data_len);
907
908
0
        bad = mbedtls_ct_bool_if(hit_first_nonzero, mbedtls_ct_uint_ne(input[i], 0x80), bad);
909
910
0
        in_padding = mbedtls_ct_bool_and(in_padding, mbedtls_ct_bool_not(is_nonzero));
911
0
    }
912
913
0
    return mbedtls_ct_error_if_else_0(bad, MBEDTLS_ERR_CIPHER_INVALID_PADDING);
914
0
}
915
#endif /* MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS */
916
917
#if defined(MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN)
918
/*
919
 * Zeros and len padding: fill with 00 ... 00 ll, where ll is padding length
920
 */
921
static void add_zeros_and_len_padding(unsigned char *output,
922
                                      size_t output_len, size_t data_len)
923
0
{
924
0
    size_t padding_len = output_len - data_len;
925
0
    unsigned char i = 0;
926
927
0
    for (i = 1; i < padding_len; i++) {
928
0
        output[data_len + i - 1] = 0x00;
929
0
    }
930
0
    output[output_len - 1] = (unsigned char) padding_len;
931
0
}
932
933
static int get_zeros_and_len_padding(unsigned char *input, size_t input_len,
934
                                     size_t *data_len)
935
0
{
936
0
    size_t i, pad_idx;
937
0
    unsigned char padding_len;
938
0
    mbedtls_ct_condition_t bad;
939
940
0
    if (NULL == input || NULL == data_len) {
941
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
942
0
    }
943
944
0
    padding_len = input[input_len - 1];
945
0
    *data_len = input_len - padding_len;
946
947
    /* Avoid logical || since it results in a branch */
948
0
    bad = mbedtls_ct_uint_gt(padding_len, input_len);
949
0
    bad = mbedtls_ct_bool_or(bad, mbedtls_ct_uint_eq(padding_len, 0));
950
951
    /* The number of bytes checked must be independent of padding_len */
952
0
    pad_idx = input_len - padding_len;
953
0
    for (i = 0; i < input_len - 1; i++) {
954
0
        mbedtls_ct_condition_t is_padding = mbedtls_ct_uint_ge(i, pad_idx);
955
0
        mbedtls_ct_condition_t nonzero_pad_byte;
956
0
        nonzero_pad_byte = mbedtls_ct_bool_if_else_0(is_padding, mbedtls_ct_bool(input[i]));
957
0
        bad = mbedtls_ct_bool_or(bad, nonzero_pad_byte);
958
0
    }
959
960
0
    return mbedtls_ct_error_if_else_0(bad, MBEDTLS_ERR_CIPHER_INVALID_PADDING);
961
0
}
962
#endif /* MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN */
963
964
#if defined(MBEDTLS_CIPHER_PADDING_ZEROS)
965
/*
966
 * Zero padding: fill with 00 ... 00
967
 */
968
static void add_zeros_padding(unsigned char *output,
969
                              size_t output_len, size_t data_len)
970
0
{
971
0
    memset(output + data_len, 0, output_len - data_len);
972
0
}
973
974
static int get_zeros_padding(unsigned char *input, size_t input_len,
975
                             size_t *data_len)
976
0
{
977
0
    size_t i;
978
0
    mbedtls_ct_condition_t done = MBEDTLS_CT_FALSE, prev_done;
979
980
0
    if (NULL == input || NULL == data_len) {
981
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
982
0
    }
983
984
0
    *data_len = 0;
985
0
    for (i = input_len; i > 0; i--) {
986
0
        prev_done = done;
987
0
        done = mbedtls_ct_bool_or(done, mbedtls_ct_uint_ne(input[i-1], 0));
988
0
        *data_len = mbedtls_ct_size_if(mbedtls_ct_bool_ne(done, prev_done), i, *data_len);
989
0
    }
990
991
0
    return 0;
992
0
}
993
#endif /* MBEDTLS_CIPHER_PADDING_ZEROS */
994
995
/*
996
 * No padding: don't pad :)
997
 *
998
 * There is no add_padding function (check for NULL in mbedtls_cipher_finish)
999
 * but a trivial get_padding function
1000
 */
1001
static int get_no_padding(unsigned char *input, size_t input_len,
1002
                          size_t *data_len)
1003
0
{
1004
0
    if (NULL == input || NULL == data_len) {
1005
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1006
0
    }
1007
1008
0
    *data_len = input_len;
1009
1010
0
    return 0;
1011
0
}
1012
#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
1013
1014
int mbedtls_cipher_finish(mbedtls_cipher_context_t *ctx,
1015
                          unsigned char *output, size_t *olen)
1016
74
{
1017
74
    if (ctx->cipher_info == NULL) {
1018
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1019
0
    }
1020
1021
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
1022
    if (ctx->psa_enabled == 1) {
1023
        /* While PSA Crypto has an API for multipart
1024
         * operations, we currently don't make it
1025
         * accessible through the cipher layer. */
1026
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1027
    }
1028
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
1029
1030
74
    *olen = 0;
1031
1032
74
#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
1033
    /* CBC mode requires padding so we make sure a call to
1034
     * mbedtls_cipher_set_padding_mode has been done successfully. */
1035
74
    if (MBEDTLS_MODE_CBC == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1036
5
        if (ctx->get_padding == NULL) {
1037
0
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1038
0
        }
1039
5
    }
1040
74
#endif
1041
1042
74
    if (MBEDTLS_MODE_CFB == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) ||
1043
74
        MBEDTLS_MODE_OFB == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) ||
1044
74
        MBEDTLS_MODE_CTR == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) ||
1045
74
        MBEDTLS_MODE_GCM == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) ||
1046
74
        MBEDTLS_MODE_CCM_STAR_NO_TAG == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) ||
1047
74
        MBEDTLS_MODE_XTS == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) ||
1048
74
        MBEDTLS_MODE_STREAM == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1049
59
        return 0;
1050
59
    }
1051
1052
15
    if ((MBEDTLS_CIPHER_CHACHA20          == ((mbedtls_cipher_type_t) ctx->cipher_info->type)) ||
1053
15
        (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ((mbedtls_cipher_type_t) ctx->cipher_info->type))) {
1054
8
        return 0;
1055
8
    }
1056
1057
7
    if (MBEDTLS_MODE_ECB == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1058
2
        if (ctx->unprocessed_len != 0) {
1059
0
            return MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED;
1060
0
        }
1061
1062
2
        return 0;
1063
2
    }
1064
1065
5
#if defined(MBEDTLS_CIPHER_MODE_CBC)
1066
5
    if (MBEDTLS_MODE_CBC == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1067
5
        int ret = 0;
1068
1069
5
        if (MBEDTLS_ENCRYPT == ctx->operation) {
1070
            /* check for 'no padding' mode */
1071
1
            if (NULL == ctx->add_padding) {
1072
0
                if (0 != ctx->unprocessed_len) {
1073
0
                    return MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED;
1074
0
                }
1075
1076
0
                return 0;
1077
0
            }
1078
1079
1
            ctx->add_padding(ctx->unprocessed_data, mbedtls_cipher_get_iv_size(ctx),
1080
1
                             ctx->unprocessed_len);
1081
4
        } else if (mbedtls_cipher_get_block_size(ctx) != ctx->unprocessed_len) {
1082
            /*
1083
             * For decrypt operations, expect a full block,
1084
             * or an empty block if no padding
1085
             */
1086
0
            if (NULL == ctx->add_padding && 0 == ctx->unprocessed_len) {
1087
0
                return 0;
1088
0
            }
1089
1090
0
            return MBEDTLS_ERR_CIPHER_FULL_BLOCK_EXPECTED;
1091
0
        }
1092
1093
        /* cipher block */
1094
5
        if (0 != (ret = mbedtls_cipher_get_base(ctx->cipher_info)->cbc_func(ctx->cipher_ctx,
1095
5
                                                                            ctx->operation,
1096
5
                                                                            mbedtls_cipher_get_block_size(
1097
5
                                                                                ctx),
1098
5
                                                                            ctx->iv,
1099
5
                                                                            ctx->unprocessed_data,
1100
5
                                                                            output))) {
1101
0
            return ret;
1102
0
        }
1103
1104
        /* Set output size for decryption */
1105
5
        if (MBEDTLS_DECRYPT == ctx->operation) {
1106
4
            return ctx->get_padding(output, mbedtls_cipher_get_block_size(ctx),
1107
4
                                    olen);
1108
4
        }
1109
1110
        /* Set output size for encryption */
1111
1
        *olen = mbedtls_cipher_get_block_size(ctx);
1112
1
        return 0;
1113
5
    }
1114
#else
1115
    ((void) output);
1116
#endif /* MBEDTLS_CIPHER_MODE_CBC */
1117
1118
0
    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1119
5
}
1120
1121
#if defined(MBEDTLS_CIPHER_MODE_WITH_PADDING)
1122
int mbedtls_cipher_set_padding_mode(mbedtls_cipher_context_t *ctx,
1123
                                    mbedtls_cipher_padding_t mode)
1124
5
{
1125
5
    if (NULL == ctx->cipher_info ||
1126
5
        MBEDTLS_MODE_CBC != ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1127
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1128
0
    }
1129
1130
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
1131
    if (ctx->psa_enabled == 1) {
1132
        /* While PSA Crypto knows about CBC padding
1133
         * schemes, we currently don't make them
1134
         * accessible through the cipher layer. */
1135
        if (mode != MBEDTLS_PADDING_NONE) {
1136
            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1137
        }
1138
1139
        return 0;
1140
    }
1141
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
1142
1143
5
    switch (mode) {
1144
0
#if defined(MBEDTLS_CIPHER_PADDING_PKCS7)
1145
5
        case MBEDTLS_PADDING_PKCS7:
1146
5
            ctx->add_padding = add_pkcs_padding;
1147
5
            ctx->get_padding = get_pkcs_padding;
1148
5
            break;
1149
0
#endif
1150
0
#if defined(MBEDTLS_CIPHER_PADDING_ONE_AND_ZEROS)
1151
0
        case MBEDTLS_PADDING_ONE_AND_ZEROS:
1152
0
            ctx->add_padding = add_one_and_zeros_padding;
1153
0
            ctx->get_padding = get_one_and_zeros_padding;
1154
0
            break;
1155
0
#endif
1156
0
#if defined(MBEDTLS_CIPHER_PADDING_ZEROS_AND_LEN)
1157
0
        case MBEDTLS_PADDING_ZEROS_AND_LEN:
1158
0
            ctx->add_padding = add_zeros_and_len_padding;
1159
0
            ctx->get_padding = get_zeros_and_len_padding;
1160
0
            break;
1161
0
#endif
1162
0
#if defined(MBEDTLS_CIPHER_PADDING_ZEROS)
1163
0
        case MBEDTLS_PADDING_ZEROS:
1164
0
            ctx->add_padding = add_zeros_padding;
1165
0
            ctx->get_padding = get_zeros_padding;
1166
0
            break;
1167
0
#endif
1168
0
        case MBEDTLS_PADDING_NONE:
1169
0
            ctx->add_padding = NULL;
1170
0
            ctx->get_padding = get_no_padding;
1171
0
            break;
1172
1173
0
        default:
1174
0
            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1175
5
    }
1176
1177
5
    return 0;
1178
5
}
1179
#endif /* MBEDTLS_CIPHER_MODE_WITH_PADDING */
1180
1181
#if defined(MBEDTLS_GCM_C) || defined(MBEDTLS_CHACHAPOLY_C)
1182
int mbedtls_cipher_write_tag(mbedtls_cipher_context_t *ctx,
1183
                             unsigned char *tag, size_t tag_len)
1184
0
{
1185
0
    if (ctx->cipher_info == NULL) {
1186
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1187
0
    }
1188
1189
0
    if (MBEDTLS_ENCRYPT != ctx->operation) {
1190
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1191
0
    }
1192
1193
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
1194
    if (ctx->psa_enabled == 1) {
1195
        /* While PSA Crypto has an API for multipart
1196
         * operations, we currently don't make it
1197
         * accessible through the cipher layer. */
1198
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1199
    }
1200
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
1201
1202
0
#if defined(MBEDTLS_GCM_C)
1203
0
    if (MBEDTLS_MODE_GCM == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1204
0
        size_t output_length;
1205
        /* The code here doesn't yet support alternative implementations
1206
         * that can delay up to a block of output. */
1207
0
        return mbedtls_gcm_finish((mbedtls_gcm_context *) ctx->cipher_ctx,
1208
0
                                  NULL, 0, &output_length,
1209
0
                                  tag, tag_len);
1210
0
    }
1211
0
#endif
1212
1213
0
#if defined(MBEDTLS_CHACHAPOLY_C)
1214
0
    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ((mbedtls_cipher_type_t) ctx->cipher_info->type)) {
1215
        /* Don't allow truncated MAC for Poly1305 */
1216
0
        if (tag_len != 16U) {
1217
0
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1218
0
        }
1219
1220
0
        return mbedtls_chachapoly_finish(
1221
0
            (mbedtls_chachapoly_context *) ctx->cipher_ctx, tag);
1222
0
    }
1223
0
#endif
1224
1225
0
    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1226
0
}
1227
1228
int mbedtls_cipher_check_tag(mbedtls_cipher_context_t *ctx,
1229
                             const unsigned char *tag, size_t tag_len)
1230
0
{
1231
0
    unsigned char check_tag[16];
1232
0
    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
1233
1234
0
    if (ctx->cipher_info == NULL) {
1235
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1236
0
    }
1237
1238
0
    if (MBEDTLS_DECRYPT != ctx->operation) {
1239
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1240
0
    }
1241
1242
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
1243
    if (ctx->psa_enabled == 1) {
1244
        /* While PSA Crypto has an API for multipart
1245
         * operations, we currently don't make it
1246
         * accessible through the cipher layer. */
1247
        return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1248
    }
1249
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
1250
1251
    /* Status to return on a non-authenticated algorithm. */
1252
0
    ret = MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1253
1254
0
#if defined(MBEDTLS_GCM_C)
1255
0
    if (MBEDTLS_MODE_GCM == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1256
0
        size_t output_length;
1257
        /* The code here doesn't yet support alternative implementations
1258
         * that can delay up to a block of output. */
1259
1260
0
        if (tag_len > sizeof(check_tag)) {
1261
0
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1262
0
        }
1263
1264
0
        if (0 != (ret = mbedtls_gcm_finish(
1265
0
                      (mbedtls_gcm_context *) ctx->cipher_ctx,
1266
0
                      NULL, 0, &output_length,
1267
0
                      check_tag, tag_len))) {
1268
0
            return ret;
1269
0
        }
1270
1271
        /* Check the tag in "constant-time" */
1272
0
        if (mbedtls_ct_memcmp(tag, check_tag, tag_len) != 0) {
1273
0
            ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
1274
0
            goto exit;
1275
0
        }
1276
0
    }
1277
0
#endif /* MBEDTLS_GCM_C */
1278
1279
0
#if defined(MBEDTLS_CHACHAPOLY_C)
1280
0
    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ((mbedtls_cipher_type_t) ctx->cipher_info->type)) {
1281
        /* Don't allow truncated MAC for Poly1305 */
1282
0
        if (tag_len != sizeof(check_tag)) {
1283
0
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1284
0
        }
1285
1286
0
        ret = mbedtls_chachapoly_finish(
1287
0
            (mbedtls_chachapoly_context *) ctx->cipher_ctx, check_tag);
1288
0
        if (ret != 0) {
1289
0
            return ret;
1290
0
        }
1291
1292
        /* Check the tag in "constant-time" */
1293
0
        if (mbedtls_ct_memcmp(tag, check_tag, tag_len) != 0) {
1294
0
            ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
1295
0
            goto exit;
1296
0
        }
1297
0
    }
1298
0
#endif /* MBEDTLS_CHACHAPOLY_C */
1299
1300
0
exit:
1301
0
    mbedtls_platform_zeroize(check_tag, tag_len);
1302
0
    return ret;
1303
0
}
1304
#endif /* MBEDTLS_GCM_C || MBEDTLS_CHACHAPOLY_C */
1305
1306
/*
1307
 * Packet-oriented wrapper for non-AEAD modes
1308
 */
1309
int mbedtls_cipher_crypt(mbedtls_cipher_context_t *ctx,
1310
                         const unsigned char *iv, size_t iv_len,
1311
                         const unsigned char *input, size_t ilen,
1312
                         unsigned char *output, size_t *olen)
1313
0
{
1314
0
    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
1315
0
    size_t finish_olen;
1316
1317
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
1318
    if (ctx->psa_enabled == 1) {
1319
        /* As in the non-PSA case, we don't check that
1320
         * a key has been set. If not, the key slot will
1321
         * still be in its default state of 0, which is
1322
         * guaranteed to be invalid, hence the PSA-call
1323
         * below will gracefully fail. */
1324
        mbedtls_cipher_context_psa * const cipher_psa =
1325
            (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
1326
1327
        psa_status_t status;
1328
        psa_cipher_operation_t cipher_op = PSA_CIPHER_OPERATION_INIT;
1329
        size_t part_len;
1330
1331
        if (ctx->operation == MBEDTLS_DECRYPT) {
1332
            status = psa_cipher_decrypt_setup(&cipher_op,
1333
                                              cipher_psa->slot,
1334
                                              cipher_psa->alg);
1335
        } else if (ctx->operation == MBEDTLS_ENCRYPT) {
1336
            status = psa_cipher_encrypt_setup(&cipher_op,
1337
                                              cipher_psa->slot,
1338
                                              cipher_psa->alg);
1339
        } else {
1340
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1341
        }
1342
1343
        /* In the following, we can immediately return on an error,
1344
         * because the PSA Crypto API guarantees that cipher operations
1345
         * are terminated by unsuccessful calls to psa_cipher_update(),
1346
         * and by any call to psa_cipher_finish(). */
1347
        if (status != PSA_SUCCESS) {
1348
            return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
1349
        }
1350
1351
        if (((mbedtls_cipher_mode_t) ctx->cipher_info->mode) != MBEDTLS_MODE_ECB) {
1352
            status = psa_cipher_set_iv(&cipher_op, iv, iv_len);
1353
            if (status != PSA_SUCCESS) {
1354
                return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
1355
            }
1356
        }
1357
1358
        status = psa_cipher_update(&cipher_op,
1359
                                   input, ilen,
1360
                                   output, ilen, olen);
1361
        if (status != PSA_SUCCESS) {
1362
            return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
1363
        }
1364
1365
        status = psa_cipher_finish(&cipher_op,
1366
                                   output + *olen, ilen - *olen,
1367
                                   &part_len);
1368
        if (status != PSA_SUCCESS) {
1369
            return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
1370
        }
1371
1372
        *olen += part_len;
1373
        return 0;
1374
    }
1375
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
1376
1377
0
    if ((ret = mbedtls_cipher_set_iv(ctx, iv, iv_len)) != 0) {
1378
0
        return ret;
1379
0
    }
1380
1381
0
    if ((ret = mbedtls_cipher_reset(ctx)) != 0) {
1382
0
        return ret;
1383
0
    }
1384
1385
0
    if ((ret = mbedtls_cipher_update(ctx, input, ilen,
1386
0
                                     output, olen)) != 0) {
1387
0
        return ret;
1388
0
    }
1389
1390
0
    if ((ret = mbedtls_cipher_finish(ctx, output + *olen,
1391
0
                                     &finish_olen)) != 0) {
1392
0
        return ret;
1393
0
    }
1394
1395
0
    *olen += finish_olen;
1396
1397
0
    return 0;
1398
0
}
1399
1400
#if defined(MBEDTLS_CIPHER_MODE_AEAD)
1401
/*
1402
 * Packet-oriented encryption for AEAD modes: internal function used by
1403
 * mbedtls_cipher_auth_encrypt_ext().
1404
 */
1405
static int mbedtls_cipher_aead_encrypt(mbedtls_cipher_context_t *ctx,
1406
                                       const unsigned char *iv, size_t iv_len,
1407
                                       const unsigned char *ad, size_t ad_len,
1408
                                       const unsigned char *input, size_t ilen,
1409
                                       unsigned char *output, size_t *olen,
1410
                                       unsigned char *tag, size_t tag_len)
1411
49
{
1412
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
1413
    if (ctx->psa_enabled == 1) {
1414
        /* As in the non-PSA case, we don't check that
1415
         * a key has been set. If not, the key slot will
1416
         * still be in its default state of 0, which is
1417
         * guaranteed to be invalid, hence the PSA-call
1418
         * below will gracefully fail. */
1419
        mbedtls_cipher_context_psa * const cipher_psa =
1420
            (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
1421
1422
        psa_status_t status;
1423
1424
        /* PSA Crypto API always writes the authentication tag
1425
         * at the end of the encrypted message. */
1426
        if (output == NULL || tag != output + ilen) {
1427
            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1428
        }
1429
1430
        status = psa_aead_encrypt(cipher_psa->slot,
1431
                                  cipher_psa->alg,
1432
                                  iv, iv_len,
1433
                                  ad, ad_len,
1434
                                  input, ilen,
1435
                                  output, ilen + tag_len, olen);
1436
        if (status != PSA_SUCCESS) {
1437
            return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
1438
        }
1439
1440
        *olen -= tag_len;
1441
        return 0;
1442
    }
1443
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
1444
1445
49
#if defined(MBEDTLS_GCM_C)
1446
49
    if (MBEDTLS_MODE_GCM == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1447
44
        *olen = ilen;
1448
44
        return mbedtls_gcm_crypt_and_tag(ctx->cipher_ctx, MBEDTLS_GCM_ENCRYPT,
1449
44
                                         ilen, iv, iv_len, ad, ad_len,
1450
44
                                         input, output, tag_len, tag);
1451
44
    }
1452
5
#endif /* MBEDTLS_GCM_C */
1453
5
#if defined(MBEDTLS_CCM_C)
1454
5
    if (MBEDTLS_MODE_CCM == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1455
0
        *olen = ilen;
1456
0
        return mbedtls_ccm_encrypt_and_tag(ctx->cipher_ctx, ilen,
1457
0
                                           iv, iv_len, ad, ad_len, input, output,
1458
0
                                           tag, tag_len);
1459
0
    }
1460
5
#endif /* MBEDTLS_CCM_C */
1461
5
#if defined(MBEDTLS_CHACHAPOLY_C)
1462
5
    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ((mbedtls_cipher_type_t) ctx->cipher_info->type)) {
1463
        /* ChachaPoly has fixed length nonce and MAC (tag) */
1464
1
        if ((iv_len != mbedtls_cipher_info_get_iv_size(ctx->cipher_info)) ||
1465
1
            (tag_len != 16U)) {
1466
1
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1467
1
        }
1468
1469
0
        *olen = ilen;
1470
0
        return mbedtls_chachapoly_encrypt_and_tag(ctx->cipher_ctx,
1471
0
                                                  ilen, iv, ad, ad_len, input, output, tag);
1472
1
    }
1473
4
#endif /* MBEDTLS_CHACHAPOLY_C */
1474
1475
4
    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1476
5
}
1477
1478
/*
1479
 * Packet-oriented encryption for AEAD modes: internal function used by
1480
 * mbedtls_cipher_auth_encrypt_ext().
1481
 */
1482
static int mbedtls_cipher_aead_decrypt(mbedtls_cipher_context_t *ctx,
1483
                                       const unsigned char *iv, size_t iv_len,
1484
                                       const unsigned char *ad, size_t ad_len,
1485
                                       const unsigned char *input, size_t ilen,
1486
                                       unsigned char *output, size_t *olen,
1487
                                       const unsigned char *tag, size_t tag_len)
1488
166
{
1489
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
1490
    if (ctx->psa_enabled == 1) {
1491
        /* As in the non-PSA case, we don't check that
1492
         * a key has been set. If not, the key slot will
1493
         * still be in its default state of 0, which is
1494
         * guaranteed to be invalid, hence the PSA-call
1495
         * below will gracefully fail. */
1496
        mbedtls_cipher_context_psa * const cipher_psa =
1497
            (mbedtls_cipher_context_psa *) ctx->cipher_ctx;
1498
1499
        psa_status_t status;
1500
1501
        /* PSA Crypto API always writes the authentication tag
1502
         * at the end of the encrypted message. */
1503
        if (input == NULL || tag != input + ilen) {
1504
            return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1505
        }
1506
1507
        status = psa_aead_decrypt(cipher_psa->slot,
1508
                                  cipher_psa->alg,
1509
                                  iv, iv_len,
1510
                                  ad, ad_len,
1511
                                  input, ilen + tag_len,
1512
                                  output, ilen, olen);
1513
        if (status == PSA_ERROR_INVALID_SIGNATURE) {
1514
            return MBEDTLS_ERR_CIPHER_AUTH_FAILED;
1515
        } else if (status != PSA_SUCCESS) {
1516
            return MBEDTLS_ERR_PLATFORM_HW_ACCEL_FAILED;
1517
        }
1518
1519
        return 0;
1520
    }
1521
#endif /* MBEDTLS_USE_PSA_CRYPTO && !MBEDTLS_DEPRECATED_REMOVED */
1522
1523
166
#if defined(MBEDTLS_GCM_C)
1524
166
    if (MBEDTLS_MODE_GCM == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1525
55
        int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
1526
1527
55
        *olen = ilen;
1528
55
        ret = mbedtls_gcm_auth_decrypt(ctx->cipher_ctx, ilen,
1529
55
                                       iv, iv_len, ad, ad_len,
1530
55
                                       tag, tag_len, input, output);
1531
1532
55
        if (ret == MBEDTLS_ERR_GCM_AUTH_FAILED) {
1533
6
            ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
1534
6
        }
1535
1536
55
        return ret;
1537
55
    }
1538
111
#endif /* MBEDTLS_GCM_C */
1539
111
#if defined(MBEDTLS_CCM_C)
1540
111
    if (MBEDTLS_MODE_CCM == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) {
1541
15
        int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
1542
1543
15
        *olen = ilen;
1544
15
        ret = mbedtls_ccm_auth_decrypt(ctx->cipher_ctx, ilen,
1545
15
                                       iv, iv_len, ad, ad_len,
1546
15
                                       input, output, tag, tag_len);
1547
1548
15
        if (ret == MBEDTLS_ERR_CCM_AUTH_FAILED) {
1549
13
            ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
1550
13
        }
1551
1552
15
        return ret;
1553
15
    }
1554
96
#endif /* MBEDTLS_CCM_C */
1555
96
#if defined(MBEDTLS_CHACHAPOLY_C)
1556
96
    if (MBEDTLS_CIPHER_CHACHA20_POLY1305 == ((mbedtls_cipher_type_t) ctx->cipher_info->type)) {
1557
39
        int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
1558
1559
        /* ChachaPoly has fixed length nonce and MAC (tag) */
1560
39
        if ((iv_len != mbedtls_cipher_info_get_iv_size(ctx->cipher_info)) ||
1561
39
            (tag_len != 16U)) {
1562
10
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1563
10
        }
1564
1565
29
        *olen = ilen;
1566
29
        ret = mbedtls_chachapoly_auth_decrypt(ctx->cipher_ctx, ilen,
1567
29
                                              iv, ad, ad_len, tag, input, output);
1568
1569
29
        if (ret == MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED) {
1570
29
            ret = MBEDTLS_ERR_CIPHER_AUTH_FAILED;
1571
29
        }
1572
1573
29
        return ret;
1574
39
    }
1575
57
#endif /* MBEDTLS_CHACHAPOLY_C */
1576
1577
57
    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1578
96
}
1579
#endif /* MBEDTLS_CIPHER_MODE_AEAD */
1580
1581
#if defined(MBEDTLS_CIPHER_MODE_AEAD) || defined(MBEDTLS_NIST_KW_C)
1582
/*
1583
 * Packet-oriented encryption for AEAD/NIST_KW: public function.
1584
 */
1585
int mbedtls_cipher_auth_encrypt_ext(mbedtls_cipher_context_t *ctx,
1586
                                    const unsigned char *iv, size_t iv_len,
1587
                                    const unsigned char *ad, size_t ad_len,
1588
                                    const unsigned char *input, size_t ilen,
1589
                                    unsigned char *output, size_t output_len,
1590
                                    size_t *olen, size_t tag_len)
1591
98
{
1592
98
#if defined(MBEDTLS_NIST_KW_C)
1593
98
    if (
1594
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
1595
        ctx->psa_enabled == 0 &&
1596
#endif
1597
98
        (MBEDTLS_MODE_KW == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) ||
1598
98
         MBEDTLS_MODE_KWP == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode))) {
1599
1
        mbedtls_nist_kw_mode_t mode =
1600
1
            (MBEDTLS_MODE_KW == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) ?
1601
1
            MBEDTLS_KW_MODE_KW : MBEDTLS_KW_MODE_KWP;
1602
1603
        /* There is no iv, tag or ad associated with KW and KWP,
1604
         * so these length should be 0 as documented. */
1605
1
        if (iv_len != 0 || tag_len != 0 || ad_len != 0) {
1606
1
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1607
1
        }
1608
1609
0
        (void) iv;
1610
0
        (void) ad;
1611
1612
0
        return mbedtls_nist_kw_wrap(ctx->cipher_ctx, mode, input, ilen,
1613
0
                                    output, olen, output_len);
1614
1
    }
1615
97
#endif /* MBEDTLS_NIST_KW_C */
1616
1617
97
#if defined(MBEDTLS_CIPHER_MODE_AEAD)
1618
    /* AEAD case: check length before passing on to shared function */
1619
97
    if (output_len < ilen + tag_len) {
1620
48
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1621
48
    }
1622
1623
49
    int ret = mbedtls_cipher_aead_encrypt(ctx, iv, iv_len, ad, ad_len,
1624
49
                                          input, ilen, output, olen,
1625
49
                                          output + ilen, tag_len);
1626
49
    *olen += tag_len;
1627
49
    return ret;
1628
#else
1629
    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1630
#endif /* MBEDTLS_CIPHER_MODE_AEAD */
1631
97
}
1632
1633
/*
1634
 * Packet-oriented decryption for AEAD/NIST_KW: public function.
1635
 */
1636
int mbedtls_cipher_auth_decrypt_ext(mbedtls_cipher_context_t *ctx,
1637
                                    const unsigned char *iv, size_t iv_len,
1638
                                    const unsigned char *ad, size_t ad_len,
1639
                                    const unsigned char *input, size_t ilen,
1640
                                    unsigned char *output, size_t output_len,
1641
                                    size_t *olen, size_t tag_len)
1642
167
{
1643
167
#if defined(MBEDTLS_NIST_KW_C)
1644
167
    if (
1645
#if defined(MBEDTLS_USE_PSA_CRYPTO) && !defined(MBEDTLS_DEPRECATED_REMOVED)
1646
        ctx->psa_enabled == 0 &&
1647
#endif
1648
167
        (MBEDTLS_MODE_KW == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode) ||
1649
167
         MBEDTLS_MODE_KWP == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode))) {
1650
1
        mbedtls_nist_kw_mode_t mode =
1651
1
            (MBEDTLS_MODE_KW == ((mbedtls_cipher_mode_t) ctx->cipher_info->mode)) ?
1652
1
            MBEDTLS_KW_MODE_KW : MBEDTLS_KW_MODE_KWP;
1653
1654
        /* There is no iv, tag or ad associated with KW and KWP,
1655
         * so these length should be 0 as documented. */
1656
1
        if (iv_len != 0 || tag_len != 0 || ad_len != 0) {
1657
1
            return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1658
1
        }
1659
1660
0
        (void) iv;
1661
0
        (void) ad;
1662
1663
0
        return mbedtls_nist_kw_unwrap(ctx->cipher_ctx, mode, input, ilen,
1664
0
                                      output, olen, output_len);
1665
1
    }
1666
166
#endif /* MBEDTLS_NIST_KW_C */
1667
1668
166
#if defined(MBEDTLS_CIPHER_MODE_AEAD)
1669
    /* AEAD case: check length before passing on to shared function */
1670
166
    if (ilen < tag_len || output_len < ilen - tag_len) {
1671
0
        return MBEDTLS_ERR_CIPHER_BAD_INPUT_DATA;
1672
0
    }
1673
1674
166
    return mbedtls_cipher_aead_decrypt(ctx, iv, iv_len, ad, ad_len,
1675
166
                                       input, ilen - tag_len, output, olen,
1676
166
                                       input + ilen - tag_len, tag_len);
1677
#else
1678
    return MBEDTLS_ERR_CIPHER_FEATURE_UNAVAILABLE;
1679
#endif /* MBEDTLS_CIPHER_MODE_AEAD */
1680
166
}
1681
#endif /* MBEDTLS_CIPHER_MODE_AEAD || MBEDTLS_NIST_KW_C */
1682
1683
#endif /* MBEDTLS_CIPHER_C */