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1 /**
2 * \file aes.h
3 *
4 * \brief This file contains AES definitions and functions.
5 *
6 * The Advanced Encryption Standard (AES) specifies a FIPS-approved
7 * cryptographic algorithm that can be used to protect electronic
8 * data.
9 *
10 * The AES algorithm is a symmetric block cipher that can
11 * encrypt and decrypt information. For more information, see
12 * <em>FIPS Publication 197: Advanced Encryption Standard</em> and
13 * <em>ISO/IEC 18033-2:2006: Information technology -- Security
14 * techniques -- Encryption algorithms -- Part 2: Asymmetric
15 * ciphers</em>.
16 *
17 * The AES-XTS block mode is standardized by NIST SP 800-38E
18 * <https://nvlpubs.nist.gov/nistpubs/legacy/sp/nistspecialpublication800-38e.pdf>
19 * and described in detail by IEEE P1619
20 * <https://ieeexplore.ieee.org/servlet/opac?punumber=4375278>.
21 */
22
23 /* Copyright (C) 2006-2018, Arm Limited (or its affiliates), All Rights Reserved.
24 * SPDX-License-Identifier: GPL-2.0
25 *
26 * This program is free software; you can redistribute it and/or modify
27 * it under the terms of the GNU General Public License as published by
28 * the Free Software Foundation; either version 2 of the License, or
29 * (at your option) any later version.
30 *
31 * This program is distributed in the hope that it will be useful,
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
34 * GNU General Public License for more details.
35 *
36 * You should have received a copy of the GNU General Public License along
37 * with this program; if not, write to the Free Software Foundation, Inc.,
38 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
39 *
40 * This file is part of Mbed TLS (https://tls.mbed.org)
41 */
42
43 #ifndef MBEDTLS_AES_H
44 #define MBEDTLS_AES_H
45
46 #if !defined(MBEDTLS_CONFIG_FILE)
47 #include "config.h"
48 #else
49 #include MBEDTLS_CONFIG_FILE
50 #endif
51
52 #include <stddef.h>
53 #include <stdint.h>
54
55 /* padlock.c and aesni.c rely on these values! */
56 #define MBEDTLS_AES_ENCRYPT 1 /**< AES encryption. */
57 #define MBEDTLS_AES_DECRYPT 0 /**< AES decryption. */
58
59 /* Error codes in range 0x0020-0x0022 */
60 #define MBEDTLS_ERR_AES_INVALID_KEY_LENGTH -0x0020 /**< Invalid key length. */
61 #define MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH -0x0022 /**< Invalid data input length. */
62
63 /* Error codes in range 0x0021-0x0025 */
64 #define MBEDTLS_ERR_AES_BAD_INPUT_DATA -0x0021 /**< Invalid input data. */
65 #define MBEDTLS_ERR_AES_FEATURE_UNAVAILABLE -0x0023 /**< Feature not available. For example, an unsupported AES key size. */
66 #define MBEDTLS_ERR_AES_HW_ACCEL_FAILED -0x0025 /**< AES hardware accelerator failed. */
67
68 #if ( defined(__ARMCC_VERSION) || defined(_MSC_VER) ) && \
69 !defined(inline) && !defined(__cplusplus)
70 #define inline __inline
71 #endif
72
73 #ifdef __cplusplus
74 extern "C" {
75 #endif
76
77 #if !defined(MBEDTLS_AES_ALT)
78 // Regular implementation
79 //
80
81 /**
82 * \brief The AES context-type definition.
83 */
84 typedef struct mbedtls_aes_context
85 {
86 int nr; /*!< The number of rounds. */
87 uint32_t *rk; /*!< AES round keys. */
88 uint32_t buf[68]; /*!< Unaligned data buffer. This buffer can
89 hold 32 extra Bytes, which can be used for
90 one of the following purposes:
91 <ul><li>Alignment if VIA padlock is
92 used.</li>
93 <li>Simplifying key expansion in the 256-bit
94 case by generating an extra round key.
95 </li></ul> */
96 }
97 mbedtls_aes_context;
98
99 #if defined(MBEDTLS_CIPHER_MODE_XTS)
100 /**
101 * \brief The AES XTS context-type definition.
102 */
103 typedef struct mbedtls_aes_xts_context
104 {
105 mbedtls_aes_context crypt; /*!< The AES context to use for AES block
106 encryption or decryption. */
107 mbedtls_aes_context tweak; /*!< The AES context used for tweak
108 computation. */
109 } mbedtls_aes_xts_context;
110 #endif /* MBEDTLS_CIPHER_MODE_XTS */
111
112 #else /* MBEDTLS_AES_ALT */
113 #include "aes_alt.h"
114 #endif /* MBEDTLS_AES_ALT */
115
116 /**
117 * \brief This function initializes the specified AES context.
118 *
119 * It must be the first API called before using
120 * the context.
121 *
122 * \param ctx The AES context to initialize.
123 */
124 void mbedtls_aes_init( mbedtls_aes_context *ctx );
125
126 /**
127 * \brief This function releases and clears the specified AES context.
128 *
129 * \param ctx The AES context to clear.
130 */
131 void mbedtls_aes_free( mbedtls_aes_context *ctx );
132
133 #if defined(MBEDTLS_CIPHER_MODE_XTS)
134 /**
135 * \brief This function initializes the specified AES XTS context.
136 *
137 * It must be the first API called before using
138 * the context.
139 *
140 * \param ctx The AES XTS context to initialize.
141 */
142 void mbedtls_aes_xts_init( mbedtls_aes_xts_context *ctx );
143
144 /**
145 * \brief This function releases and clears the specified AES XTS context.
146 *
147 * \param ctx The AES XTS context to clear.
148 */
149 void mbedtls_aes_xts_free( mbedtls_aes_xts_context *ctx );
150 #endif /* MBEDTLS_CIPHER_MODE_XTS */
151
152 /**
153 * \brief This function sets the encryption key.
154 *
155 * \param ctx The AES context to which the key should be bound.
156 * \param key The encryption key.
157 * \param keybits The size of data passed in bits. Valid options are:
158 * <ul><li>128 bits</li>
159 * <li>192 bits</li>
160 * <li>256 bits</li></ul>
161 *
162 * \return \c 0 on success.
163 * \return #MBEDTLS_ERR_AES_INVALID_KEY_LENGTH on failure.
164 */
165 int mbedtls_aes_setkey_enc( mbedtls_aes_context *ctx, const unsigned char *key,
166 unsigned int keybits );
167
168 /**
169 * \brief This function sets the decryption key.
170 *
171 * \param ctx The AES context to which the key should be bound.
172 * \param key The decryption key.
173 * \param keybits The size of data passed. Valid options are:
174 * <ul><li>128 bits</li>
175 * <li>192 bits</li>
176 * <li>256 bits</li></ul>
177 *
178 * \return \c 0 on success.
179 * \return #MBEDTLS_ERR_AES_INVALID_KEY_LENGTH on failure.
180 */
181 int mbedtls_aes_setkey_dec( mbedtls_aes_context *ctx, const unsigned char *key,
182 unsigned int keybits );
183
184 #if defined(MBEDTLS_CIPHER_MODE_XTS)
185 /**
186 * \brief This function prepares an XTS context for encryption and
187 * sets the encryption key.
188 *
189 * \param ctx The AES XTS context to which the key should be bound.
190 * \param key The encryption key. This is comprised of the XTS key1
191 * concatenated with the XTS key2.
192 * \param keybits The size of \p key passed in bits. Valid options are:
193 * <ul><li>256 bits (each of key1 and key2 is a 128-bit key)</li>
194 * <li>512 bits (each of key1 and key2 is a 256-bit key)</li></ul>
195 *
196 * \return \c 0 on success.
197 * \return #MBEDTLS_ERR_AES_INVALID_KEY_LENGTH on failure.
198 */
199 int mbedtls_aes_xts_setkey_enc( mbedtls_aes_xts_context *ctx,
200 const unsigned char *key,
201 unsigned int keybits );
202
203 /**
204 * \brief This function prepares an XTS context for decryption and
205 * sets the decryption key.
206 *
207 * \param ctx The AES XTS context to which the key should be bound.
208 * \param key The decryption key. This is comprised of the XTS key1
209 * concatenated with the XTS key2.
210 * \param keybits The size of \p key passed in bits. Valid options are:
211 * <ul><li>256 bits (each of key1 and key2 is a 128-bit key)</li>
212 * <li>512 bits (each of key1 and key2 is a 256-bit key)</li></ul>
213 *
214 * \return \c 0 on success.
215 * \return #MBEDTLS_ERR_AES_INVALID_KEY_LENGTH on failure.
216 */
217 int mbedtls_aes_xts_setkey_dec( mbedtls_aes_xts_context *ctx,
218 const unsigned char *key,
219 unsigned int keybits );
220 #endif /* MBEDTLS_CIPHER_MODE_XTS */
221
222 /**
223 * \brief This function performs an AES single-block encryption or
224 * decryption operation.
225 *
226 * It performs the operation defined in the \p mode parameter
227 * (encrypt or decrypt), on the input data buffer defined in
228 * the \p input parameter.
229 *
230 * mbedtls_aes_init(), and either mbedtls_aes_setkey_enc() or
231 * mbedtls_aes_setkey_dec() must be called before the first
232 * call to this API with the same context.
233 *
234 * \param ctx The AES context to use for encryption or decryption.
235 * \param mode The AES operation: #MBEDTLS_AES_ENCRYPT or
236 * #MBEDTLS_AES_DECRYPT.
237 * \param input The 16-Byte buffer holding the input data.
238 * \param output The 16-Byte buffer holding the output data.
239
240 * \return \c 0 on success.
241 */
242 int mbedtls_aes_crypt_ecb( mbedtls_aes_context *ctx,
243 int mode,
244 const unsigned char input[16],
245 unsigned char output[16] );
246
247 #if defined(MBEDTLS_CIPHER_MODE_CBC)
248 /**
249 * \brief This function performs an AES-CBC encryption or decryption operation
250 * on full blocks.
251 *
252 * It performs the operation defined in the \p mode
253 * parameter (encrypt/decrypt), on the input data buffer defined in
254 * the \p input parameter.
255 *
256 * It can be called as many times as needed, until all the input
257 * data is processed. mbedtls_aes_init(), and either
258 * mbedtls_aes_setkey_enc() or mbedtls_aes_setkey_dec() must be called
259 * before the first call to this API with the same context.
260 *
261 * \note This function operates on aligned blocks, that is, the input size
262 * must be a multiple of the AES block size of 16 Bytes.
263 *
264 * \note Upon exit, the content of the IV is updated so that you can
265 * call the same function again on the next
266 * block(s) of data and get the same result as if it was
267 * encrypted in one call. This allows a "streaming" usage.
268 * If you need to retain the contents of the IV, you should
269 * either save it manually or use the cipher module instead.
270 *
271 *
272 * \param ctx The AES context to use for encryption or decryption.
273 * \param mode The AES operation: #MBEDTLS_AES_ENCRYPT or
274 * #MBEDTLS_AES_DECRYPT.
275 * \param length The length of the input data in Bytes. This must be a
276 * multiple of the block size (16 Bytes).
277 * \param iv Initialization vector (updated after use).
278 * \param input The buffer holding the input data.
279 * \param output The buffer holding the output data.
280 *
281 * \return \c 0 on success.
282 * \return #MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH
283 * on failure.
284 */
285 int mbedtls_aes_crypt_cbc( mbedtls_aes_context *ctx,
286 int mode,
287 size_t length,
288 unsigned char iv[16],
289 const unsigned char *input,
290 unsigned char *output );
291 #endif /* MBEDTLS_CIPHER_MODE_CBC */
292
293 #if defined(MBEDTLS_CIPHER_MODE_XTS)
294 /**
295 * \brief This function performs an AES-XTS encryption or decryption
296 * operation for an entire XTS data unit.
297 *
298 * AES-XTS encrypts or decrypts blocks based on their location as
299 * defined by a data unit number. The data unit number must be
300 * provided by \p data_unit.
301 *
302 * NIST SP 800-38E limits the maximum size of a data unit to 2^20
303 * AES blocks. If the data unit is larger than this, this function
304 * returns #MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH.
305 *
306 * \param ctx The AES XTS context to use for AES XTS operations.
307 * \param mode The AES operation: #MBEDTLS_AES_ENCRYPT or
308 * #MBEDTLS_AES_DECRYPT.
309 * \param length The length of a data unit in bytes. This can be any
310 * length between 16 bytes and 2^24 bytes inclusive
311 * (between 1 and 2^20 block cipher blocks).
312 * \param data_unit The address of the data unit encoded as an array of 16
313 * bytes in little-endian format. For disk encryption, this
314 * is typically the index of the block device sector that
315 * contains the data.
316 * \param input The buffer holding the input data (which is an entire
317 * data unit). This function reads \p length bytes from \p
318 * input.
319 * \param output The buffer holding the output data (which is an entire
320 * data unit). This function writes \p length bytes to \p
321 * output.
322 *
323 * \return \c 0 on success.
324 * \return #MBEDTLS_ERR_AES_INVALID_INPUT_LENGTH if \p length is
325 * smaller than an AES block in size (16 bytes) or if \p
326 * length is larger than 2^20 blocks (16 MiB).
327 */
328 int mbedtls_aes_crypt_xts( mbedtls_aes_xts_context *ctx,
329 int mode,
330 size_t length,
331 const unsigned char data_unit[16],
332 const unsigned char *input,
333 unsigned char *output );
334 #endif /* MBEDTLS_CIPHER_MODE_XTS */
335
336 #if defined(MBEDTLS_CIPHER_MODE_CFB)
337 /**
338 * \brief This function performs an AES-CFB128 encryption or decryption
339 * operation.
340 *
341 * It performs the operation defined in the \p mode
342 * parameter (encrypt or decrypt), on the input data buffer
343 * defined in the \p input parameter.
344 *
345 * For CFB, you must set up the context with mbedtls_aes_setkey_enc(),
346 * regardless of whether you are performing an encryption or decryption
347 * operation, that is, regardless of the \p mode parameter. This is
348 * because CFB mode uses the same key schedule for encryption and
349 * decryption.
350 *
351 * \note Upon exit, the content of the IV is updated so that you can
352 * call the same function again on the next
353 * block(s) of data and get the same result as if it was
354 * encrypted in one call. This allows a "streaming" usage.
355 * If you need to retain the contents of the
356 * IV, you must either save it manually or use the cipher
357 * module instead.
358 *
359 *
360 * \param ctx The AES context to use for encryption or decryption.
361 * \param mode The AES operation: #MBEDTLS_AES_ENCRYPT or
362 * #MBEDTLS_AES_DECRYPT.
363 * \param length The length of the input data.
364 * \param iv_off The offset in IV (updated after use).
365 * \param iv The initialization vector (updated after use).
366 * \param input The buffer holding the input data.
367 * \param output The buffer holding the output data.
368 *
369 * \return \c 0 on success.
370 */
371 int mbedtls_aes_crypt_cfb128( mbedtls_aes_context *ctx,
372 int mode,
373 size_t length,
374 size_t *iv_off,
375 unsigned char iv[16],
376 const unsigned char *input,
377 unsigned char *output );
378
379 /**
380 * \brief This function performs an AES-CFB8 encryption or decryption
381 * operation.
382 *
383 * It performs the operation defined in the \p mode
384 * parameter (encrypt/decrypt), on the input data buffer defined
385 * in the \p input parameter.
386 *
387 * Due to the nature of CFB, you must use the same key schedule for
388 * both encryption and decryption operations. Therefore, you must
389 * use the context initialized with mbedtls_aes_setkey_enc() for
390 * both #MBEDTLS_AES_ENCRYPT and #MBEDTLS_AES_DECRYPT.
391 *
392 * \note Upon exit, the content of the IV is updated so that you can
393 * call the same function again on the next
394 * block(s) of data and get the same result as if it was
395 * encrypted in one call. This allows a "streaming" usage.
396 * If you need to retain the contents of the
397 * IV, you should either save it manually or use the cipher
398 * module instead.
399 *
400 *
401 * \param ctx The AES context to use for encryption or decryption.
402 * \param mode The AES operation: #MBEDTLS_AES_ENCRYPT or
403 * #MBEDTLS_AES_DECRYPT
404 * \param length The length of the input data.
405 * \param iv The initialization vector (updated after use).
406 * \param input The buffer holding the input data.
407 * \param output The buffer holding the output data.
408 *
409 * \return \c 0 on success.
410 */
411 int mbedtls_aes_crypt_cfb8( mbedtls_aes_context *ctx,
412 int mode,
413 size_t length,
414 unsigned char iv[16],
415 const unsigned char *input,
416 unsigned char *output );
417 #endif /*MBEDTLS_CIPHER_MODE_CFB */
418
419 #if defined(MBEDTLS_CIPHER_MODE_OFB)
420 /**
421 * \brief This function performs an AES-OFB (Output Feedback Mode)
422 * encryption or decryption operation.
423 *
424 * For OFB, you must set up the context with
425 * mbedtls_aes_setkey_enc(), regardless of whether you are
426 * performing an encryption or decryption operation. This is
427 * because OFB mode uses the same key schedule for encryption and
428 * decryption.
429 *
430 * The OFB operation is identical for encryption or decryption,
431 * therefore no operation mode needs to be specified.
432 *
433 * \note Upon exit, the content of iv, the Initialisation Vector, is
434 * updated so that you can call the same function again on the next
435 * block(s) of data and get the same result as if it was encrypted
436 * in one call. This allows a "streaming" usage, by initialising
437 * iv_off to 0 before the first call, and preserving its value
438 * between calls.
439 *
440 * For non-streaming use, the iv should be initialised on each call
441 * to a unique value, and iv_off set to 0 on each call.
442 *
443 * If you need to retain the contents of the initialisation vector,
444 * you must either save it manually or use the cipher module
445 * instead.
446 *
447 * \warning For the OFB mode, the initialisation vector must be unique
448 * every encryption operation. Reuse of an initialisation vector
449 * will compromise security.
450 *
451 * \param ctx The AES context to use for encryption or decryption.
452 * \param length The length of the input data.
453 * \param iv_off The offset in IV (updated after use).
454 * \param iv The initialization vector (updated after use).
455 * \param input The buffer holding the input data.
456 * \param output The buffer holding the output data.
457 *
458 * \return \c 0 on success.
459 */
460 int mbedtls_aes_crypt_ofb( mbedtls_aes_context *ctx,
461 size_t length,
462 size_t *iv_off,
463 unsigned char iv[16],
464 const unsigned char *input,
465 unsigned char *output );
466
467 #endif /* MBEDTLS_CIPHER_MODE_OFB */
468
469 #if defined(MBEDTLS_CIPHER_MODE_CTR)
470 /**
471 * \brief This function performs an AES-CTR encryption or decryption
472 * operation.
473 *
474 * This function performs the operation defined in the \p mode
475 * parameter (encrypt/decrypt), on the input data buffer
476 * defined in the \p input parameter.
477 *
478 * Due to the nature of CTR, you must use the same key schedule
479 * for both encryption and decryption operations. Therefore, you
480 * must use the context initialized with mbedtls_aes_setkey_enc()
481 * for both #MBEDTLS_AES_ENCRYPT and #MBEDTLS_AES_DECRYPT.
482 *
483 * \warning You must never reuse a nonce value with the same key. Doing so
484 * would void the encryption for the two messages encrypted with
485 * the same nonce and key.
486 *
487 * There are two common strategies for managing nonces with CTR:
488 *
489 * 1. You can handle everything as a single message processed over
490 * successive calls to this function. In that case, you want to
491 * set \p nonce_counter and \p nc_off to 0 for the first call, and
492 * then preserve the values of \p nonce_counter, \p nc_off and \p
493 * stream_block across calls to this function as they will be
494 * updated by this function.
495 *
496 * With this strategy, you must not encrypt more than 2**128
497 * blocks of data with the same key.
498 *
499 * 2. You can encrypt separate messages by dividing the \p
500 * nonce_counter buffer in two areas: the first one used for a
501 * per-message nonce, handled by yourself, and the second one
502 * updated by this function internally.
503 *
504 * For example, you might reserve the first 12 bytes for the
505 * per-message nonce, and the last 4 bytes for internal use. In that
506 * case, before calling this function on a new message you need to
507 * set the first 12 bytes of \p nonce_counter to your chosen nonce
508 * value, the last 4 to 0, and \p nc_off to 0 (which will cause \p
509 * stream_block to be ignored). That way, you can encrypt at most
510 * 2**96 messages of up to 2**32 blocks each with the same key.
511 *
512 * The per-message nonce (or information sufficient to reconstruct
513 * it) needs to be communicated with the ciphertext and must be unique.
514 * The recommended way to ensure uniqueness is to use a message
515 * counter. An alternative is to generate random nonces, but this
516 * limits the number of messages that can be securely encrypted:
517 * for example, with 96-bit random nonces, you should not encrypt
518 * more than 2**32 messages with the same key.
519 *
520 * Note that for both stategies, sizes are measured in blocks and
521 * that an AES block is 16 bytes.
522 *
523 * \warning Upon return, \p stream_block contains sensitive data. Its
524 * content must not be written to insecure storage and should be
525 * securely discarded as soon as it's no longer needed.
526 *
527 * \param ctx The AES context to use for encryption or decryption.
528 * \param length The length of the input data.
529 * \param nc_off The offset in the current \p stream_block, for
530 * resuming within the current cipher stream. The
531 * offset pointer should be 0 at the start of a stream.
532 * \param nonce_counter The 128-bit nonce and counter.
533 * \param stream_block The saved stream block for resuming. This is
534 * overwritten by the function.
535 * \param input The buffer holding the input data.
536 * \param output The buffer holding the output data.
537 *
538 * \return \c 0 on success.
539 */
540 int mbedtls_aes_crypt_ctr( mbedtls_aes_context *ctx,
541 size_t length,
542 size_t *nc_off,
543 unsigned char nonce_counter[16],
544 unsigned char stream_block[16],
545 const unsigned char *input,
546 unsigned char *output );
547 #endif /* MBEDTLS_CIPHER_MODE_CTR */
548
549 /**
550 * \brief Internal AES block encryption function. This is only
551 * exposed to allow overriding it using
552 * \c MBEDTLS_AES_ENCRYPT_ALT.
553 *
554 * \param ctx The AES context to use for encryption.
555 * \param input The plaintext block.
556 * \param output The output (ciphertext) block.
557 *
558 * \return \c 0 on success.
559 */
560 int mbedtls_internal_aes_encrypt( mbedtls_aes_context *ctx,
561 const unsigned char input[16],
562 unsigned char output[16] );
563
564 /**
565 * \brief Internal AES block decryption function. This is only
566 * exposed to allow overriding it using see
567 * \c MBEDTLS_AES_DECRYPT_ALT.
568 *
569 * \param ctx The AES context to use for decryption.
570 * \param input The ciphertext block.
571 * \param output The output (plaintext) block.
572 *
573 * \return \c 0 on success.
574 */
575 int mbedtls_internal_aes_decrypt( mbedtls_aes_context *ctx,
576 const unsigned char input[16],
577 unsigned char output[16] );
578
579 #if !defined(MBEDTLS_DEPRECATED_REMOVED)
580 #if defined(MBEDTLS_DEPRECATED_WARNING)
581 #define MBEDTLS_DEPRECATED __attribute__((deprecated))
582 #else
583 #define MBEDTLS_DEPRECATED
584 #endif
585 /**
586 * \brief Deprecated internal AES block encryption function
587 * without return value.
588 *
589 * \deprecated Superseded by mbedtls_aes_encrypt_ext() in 2.5.0.
590 *
591 * \param ctx The AES context to use for encryption.
592 * \param input Plaintext block.
593 * \param output Output (ciphertext) block.
594 */
595 MBEDTLS_DEPRECATED void mbedtls_aes_encrypt( mbedtls_aes_context *ctx,
596 const unsigned char input[16],
597 unsigned char output[16] );
598
599 /**
600 * \brief Deprecated internal AES block decryption function
601 * without return value.
602 *
603 * \deprecated Superseded by mbedtls_aes_decrypt_ext() in 2.5.0.
604 *
605 * \param ctx The AES context to use for decryption.
606 * \param input Ciphertext block.
607 * \param output Output (plaintext) block.
608 */
609 MBEDTLS_DEPRECATED void mbedtls_aes_decrypt( mbedtls_aes_context *ctx,
610 const unsigned char input[16],
611 unsigned char output[16] );
612
613 #undef MBEDTLS_DEPRECATED
614 #endif /* !MBEDTLS_DEPRECATED_REMOVED */
615
616 /**
617 * \brief Checkup routine.
618 *
619 * \return \c 0 on success.
620 * \return \c 1 on failure.
621 */
622 int mbedtls_aes_self_test( int verbose );
623
624 #ifdef __cplusplus
625 }
626 #endif
627
628 #endif /* aes.h */
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