1 | /**
|
---|
2 | * \file chachapoly.c
|
---|
3 | *
|
---|
4 | * \brief ChaCha20-Poly1305 AEAD construction based on RFC 7539.
|
---|
5 | *
|
---|
6 | * Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
|
---|
7 | * SPDX-License-Identifier: Apache-2.0
|
---|
8 | *
|
---|
9 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
|
---|
10 | * not use this file except in compliance with the License.
|
---|
11 | * You may obtain a copy of the License at
|
---|
12 | *
|
---|
13 | * http://www.apache.org/licenses/LICENSE-2.0
|
---|
14 | *
|
---|
15 | * Unless required by applicable law or agreed to in writing, software
|
---|
16 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
---|
17 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
---|
18 | * See the License for the specific language governing permissions and
|
---|
19 | * limitations under the License.
|
---|
20 | *
|
---|
21 | * This file is part of mbed TLS (https://tls.mbed.org)
|
---|
22 | */
|
---|
23 | #if !defined(MBEDTLS_CONFIG_FILE)
|
---|
24 | #include "mbedtls/config.h"
|
---|
25 | #else
|
---|
26 | #include MBEDTLS_CONFIG_FILE
|
---|
27 | #endif
|
---|
28 |
|
---|
29 | #if defined(MBEDTLS_CHACHAPOLY_C)
|
---|
30 |
|
---|
31 | #include "mbedtls/chachapoly.h"
|
---|
32 | #include "mbedtls/platform_util.h"
|
---|
33 |
|
---|
34 | #include <string.h>
|
---|
35 |
|
---|
36 | #if defined(MBEDTLS_SELF_TEST)
|
---|
37 | #if defined(MBEDTLS_PLATFORM_C)
|
---|
38 | #include "mbedtls/platform.h"
|
---|
39 | #else
|
---|
40 | #include <stdio.h>
|
---|
41 | #define mbedtls_printf printf
|
---|
42 | #endif /* MBEDTLS_PLATFORM_C */
|
---|
43 | #endif /* MBEDTLS_SELF_TEST */
|
---|
44 |
|
---|
45 | #if !defined(MBEDTLS_CHACHAPOLY_ALT)
|
---|
46 |
|
---|
47 | /* Parameter validation macros */
|
---|
48 | #define CHACHAPOLY_VALIDATE_RET( cond ) \
|
---|
49 | MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_POLY1305_BAD_INPUT_DATA )
|
---|
50 | #define CHACHAPOLY_VALIDATE( cond ) \
|
---|
51 | MBEDTLS_INTERNAL_VALIDATE( cond )
|
---|
52 |
|
---|
53 | #define CHACHAPOLY_STATE_INIT ( 0 )
|
---|
54 | #define CHACHAPOLY_STATE_AAD ( 1 )
|
---|
55 | #define CHACHAPOLY_STATE_CIPHERTEXT ( 2 ) /* Encrypting or decrypting */
|
---|
56 | #define CHACHAPOLY_STATE_FINISHED ( 3 )
|
---|
57 |
|
---|
58 | /**
|
---|
59 | * \brief Adds nul bytes to pad the AAD for Poly1305.
|
---|
60 | *
|
---|
61 | * \param ctx The ChaCha20-Poly1305 context.
|
---|
62 | */
|
---|
63 | static int chachapoly_pad_aad( mbedtls_chachapoly_context *ctx )
|
---|
64 | {
|
---|
65 | uint32_t partial_block_len = (uint32_t) ( ctx->aad_len % 16U );
|
---|
66 | unsigned char zeroes[15];
|
---|
67 |
|
---|
68 | if( partial_block_len == 0U )
|
---|
69 | return( 0 );
|
---|
70 |
|
---|
71 | memset( zeroes, 0, sizeof( zeroes ) );
|
---|
72 |
|
---|
73 | return( mbedtls_poly1305_update( &ctx->poly1305_ctx,
|
---|
74 | zeroes,
|
---|
75 | 16U - partial_block_len ) );
|
---|
76 | }
|
---|
77 |
|
---|
78 | /**
|
---|
79 | * \brief Adds nul bytes to pad the ciphertext for Poly1305.
|
---|
80 | *
|
---|
81 | * \param ctx The ChaCha20-Poly1305 context.
|
---|
82 | */
|
---|
83 | static int chachapoly_pad_ciphertext( mbedtls_chachapoly_context *ctx )
|
---|
84 | {
|
---|
85 | uint32_t partial_block_len = (uint32_t) ( ctx->ciphertext_len % 16U );
|
---|
86 | unsigned char zeroes[15];
|
---|
87 |
|
---|
88 | if( partial_block_len == 0U )
|
---|
89 | return( 0 );
|
---|
90 |
|
---|
91 | memset( zeroes, 0, sizeof( zeroes ) );
|
---|
92 | return( mbedtls_poly1305_update( &ctx->poly1305_ctx,
|
---|
93 | zeroes,
|
---|
94 | 16U - partial_block_len ) );
|
---|
95 | }
|
---|
96 |
|
---|
97 | void mbedtls_chachapoly_init( mbedtls_chachapoly_context *ctx )
|
---|
98 | {
|
---|
99 | CHACHAPOLY_VALIDATE( ctx != NULL );
|
---|
100 |
|
---|
101 | mbedtls_chacha20_init( &ctx->chacha20_ctx );
|
---|
102 | mbedtls_poly1305_init( &ctx->poly1305_ctx );
|
---|
103 | ctx->aad_len = 0U;
|
---|
104 | ctx->ciphertext_len = 0U;
|
---|
105 | ctx->state = CHACHAPOLY_STATE_INIT;
|
---|
106 | ctx->mode = MBEDTLS_CHACHAPOLY_ENCRYPT;
|
---|
107 | }
|
---|
108 |
|
---|
109 | void mbedtls_chachapoly_free( mbedtls_chachapoly_context *ctx )
|
---|
110 | {
|
---|
111 | if( ctx == NULL )
|
---|
112 | return;
|
---|
113 |
|
---|
114 | mbedtls_chacha20_free( &ctx->chacha20_ctx );
|
---|
115 | mbedtls_poly1305_free( &ctx->poly1305_ctx );
|
---|
116 | ctx->aad_len = 0U;
|
---|
117 | ctx->ciphertext_len = 0U;
|
---|
118 | ctx->state = CHACHAPOLY_STATE_INIT;
|
---|
119 | ctx->mode = MBEDTLS_CHACHAPOLY_ENCRYPT;
|
---|
120 | }
|
---|
121 |
|
---|
122 | int mbedtls_chachapoly_setkey( mbedtls_chachapoly_context *ctx,
|
---|
123 | const unsigned char key[32] )
|
---|
124 | {
|
---|
125 | int ret;
|
---|
126 | CHACHAPOLY_VALIDATE_RET( ctx != NULL );
|
---|
127 | CHACHAPOLY_VALIDATE_RET( key != NULL );
|
---|
128 |
|
---|
129 | ret = mbedtls_chacha20_setkey( &ctx->chacha20_ctx, key );
|
---|
130 |
|
---|
131 | return( ret );
|
---|
132 | }
|
---|
133 |
|
---|
134 | int mbedtls_chachapoly_starts( mbedtls_chachapoly_context *ctx,
|
---|
135 | const unsigned char nonce[12],
|
---|
136 | mbedtls_chachapoly_mode_t mode )
|
---|
137 | {
|
---|
138 | int ret;
|
---|
139 | unsigned char poly1305_key[64];
|
---|
140 | CHACHAPOLY_VALIDATE_RET( ctx != NULL );
|
---|
141 | CHACHAPOLY_VALIDATE_RET( nonce != NULL );
|
---|
142 |
|
---|
143 | /* Set counter = 0, will be update to 1 when generating Poly1305 key */
|
---|
144 | ret = mbedtls_chacha20_starts( &ctx->chacha20_ctx, nonce, 0U );
|
---|
145 | if( ret != 0 )
|
---|
146 | goto cleanup;
|
---|
147 |
|
---|
148 | /* Generate the Poly1305 key by getting the ChaCha20 keystream output with
|
---|
149 | * counter = 0. This is the same as encrypting a buffer of zeroes.
|
---|
150 | * Only the first 256-bits (32 bytes) of the key is used for Poly1305.
|
---|
151 | * The other 256 bits are discarded.
|
---|
152 | */
|
---|
153 | memset( poly1305_key, 0, sizeof( poly1305_key ) );
|
---|
154 | ret = mbedtls_chacha20_update( &ctx->chacha20_ctx, sizeof( poly1305_key ),
|
---|
155 | poly1305_key, poly1305_key );
|
---|
156 | if( ret != 0 )
|
---|
157 | goto cleanup;
|
---|
158 |
|
---|
159 | ret = mbedtls_poly1305_starts( &ctx->poly1305_ctx, poly1305_key );
|
---|
160 |
|
---|
161 | if( ret == 0 )
|
---|
162 | {
|
---|
163 | ctx->aad_len = 0U;
|
---|
164 | ctx->ciphertext_len = 0U;
|
---|
165 | ctx->state = CHACHAPOLY_STATE_AAD;
|
---|
166 | ctx->mode = mode;
|
---|
167 | }
|
---|
168 |
|
---|
169 | cleanup:
|
---|
170 | mbedtls_platform_zeroize( poly1305_key, 64U );
|
---|
171 | return( ret );
|
---|
172 | }
|
---|
173 |
|
---|
174 | int mbedtls_chachapoly_update_aad( mbedtls_chachapoly_context *ctx,
|
---|
175 | const unsigned char *aad,
|
---|
176 | size_t aad_len )
|
---|
177 | {
|
---|
178 | CHACHAPOLY_VALIDATE_RET( ctx != NULL );
|
---|
179 | CHACHAPOLY_VALIDATE_RET( aad_len == 0 || aad != NULL );
|
---|
180 |
|
---|
181 | if( ctx->state != CHACHAPOLY_STATE_AAD )
|
---|
182 | return( MBEDTLS_ERR_CHACHAPOLY_BAD_STATE );
|
---|
183 |
|
---|
184 | ctx->aad_len += aad_len;
|
---|
185 |
|
---|
186 | return( mbedtls_poly1305_update( &ctx->poly1305_ctx, aad, aad_len ) );
|
---|
187 | }
|
---|
188 |
|
---|
189 | int mbedtls_chachapoly_update( mbedtls_chachapoly_context *ctx,
|
---|
190 | size_t len,
|
---|
191 | const unsigned char *input,
|
---|
192 | unsigned char *output )
|
---|
193 | {
|
---|
194 | int ret;
|
---|
195 | CHACHAPOLY_VALIDATE_RET( ctx != NULL );
|
---|
196 | CHACHAPOLY_VALIDATE_RET( len == 0 || input != NULL );
|
---|
197 | CHACHAPOLY_VALIDATE_RET( len == 0 || output != NULL );
|
---|
198 |
|
---|
199 | if( ( ctx->state != CHACHAPOLY_STATE_AAD ) &&
|
---|
200 | ( ctx->state != CHACHAPOLY_STATE_CIPHERTEXT ) )
|
---|
201 | {
|
---|
202 | return( MBEDTLS_ERR_CHACHAPOLY_BAD_STATE );
|
---|
203 | }
|
---|
204 |
|
---|
205 | if( ctx->state == CHACHAPOLY_STATE_AAD )
|
---|
206 | {
|
---|
207 | ctx->state = CHACHAPOLY_STATE_CIPHERTEXT;
|
---|
208 |
|
---|
209 | ret = chachapoly_pad_aad( ctx );
|
---|
210 | if( ret != 0 )
|
---|
211 | return( ret );
|
---|
212 | }
|
---|
213 |
|
---|
214 | ctx->ciphertext_len += len;
|
---|
215 |
|
---|
216 | if( ctx->mode == MBEDTLS_CHACHAPOLY_ENCRYPT )
|
---|
217 | {
|
---|
218 | ret = mbedtls_chacha20_update( &ctx->chacha20_ctx, len, input, output );
|
---|
219 | if( ret != 0 )
|
---|
220 | return( ret );
|
---|
221 |
|
---|
222 | ret = mbedtls_poly1305_update( &ctx->poly1305_ctx, output, len );
|
---|
223 | if( ret != 0 )
|
---|
224 | return( ret );
|
---|
225 | }
|
---|
226 | else /* DECRYPT */
|
---|
227 | {
|
---|
228 | ret = mbedtls_poly1305_update( &ctx->poly1305_ctx, input, len );
|
---|
229 | if( ret != 0 )
|
---|
230 | return( ret );
|
---|
231 |
|
---|
232 | ret = mbedtls_chacha20_update( &ctx->chacha20_ctx, len, input, output );
|
---|
233 | if( ret != 0 )
|
---|
234 | return( ret );
|
---|
235 | }
|
---|
236 |
|
---|
237 | return( 0 );
|
---|
238 | }
|
---|
239 |
|
---|
240 | int mbedtls_chachapoly_finish( mbedtls_chachapoly_context *ctx,
|
---|
241 | unsigned char mac[16] )
|
---|
242 | {
|
---|
243 | int ret;
|
---|
244 | unsigned char len_block[16];
|
---|
245 | CHACHAPOLY_VALIDATE_RET( ctx != NULL );
|
---|
246 | CHACHAPOLY_VALIDATE_RET( mac != NULL );
|
---|
247 |
|
---|
248 | if( ctx->state == CHACHAPOLY_STATE_INIT )
|
---|
249 | {
|
---|
250 | return( MBEDTLS_ERR_CHACHAPOLY_BAD_STATE );
|
---|
251 | }
|
---|
252 |
|
---|
253 | if( ctx->state == CHACHAPOLY_STATE_AAD )
|
---|
254 | {
|
---|
255 | ret = chachapoly_pad_aad( ctx );
|
---|
256 | if( ret != 0 )
|
---|
257 | return( ret );
|
---|
258 | }
|
---|
259 | else if( ctx->state == CHACHAPOLY_STATE_CIPHERTEXT )
|
---|
260 | {
|
---|
261 | ret = chachapoly_pad_ciphertext( ctx );
|
---|
262 | if( ret != 0 )
|
---|
263 | return( ret );
|
---|
264 | }
|
---|
265 |
|
---|
266 | ctx->state = CHACHAPOLY_STATE_FINISHED;
|
---|
267 |
|
---|
268 | /* The lengths of the AAD and ciphertext are processed by
|
---|
269 | * Poly1305 as the final 128-bit block, encoded as little-endian integers.
|
---|
270 | */
|
---|
271 | len_block[ 0] = (unsigned char)( ctx->aad_len );
|
---|
272 | len_block[ 1] = (unsigned char)( ctx->aad_len >> 8 );
|
---|
273 | len_block[ 2] = (unsigned char)( ctx->aad_len >> 16 );
|
---|
274 | len_block[ 3] = (unsigned char)( ctx->aad_len >> 24 );
|
---|
275 | len_block[ 4] = (unsigned char)( ctx->aad_len >> 32 );
|
---|
276 | len_block[ 5] = (unsigned char)( ctx->aad_len >> 40 );
|
---|
277 | len_block[ 6] = (unsigned char)( ctx->aad_len >> 48 );
|
---|
278 | len_block[ 7] = (unsigned char)( ctx->aad_len >> 56 );
|
---|
279 | len_block[ 8] = (unsigned char)( ctx->ciphertext_len );
|
---|
280 | len_block[ 9] = (unsigned char)( ctx->ciphertext_len >> 8 );
|
---|
281 | len_block[10] = (unsigned char)( ctx->ciphertext_len >> 16 );
|
---|
282 | len_block[11] = (unsigned char)( ctx->ciphertext_len >> 24 );
|
---|
283 | len_block[12] = (unsigned char)( ctx->ciphertext_len >> 32 );
|
---|
284 | len_block[13] = (unsigned char)( ctx->ciphertext_len >> 40 );
|
---|
285 | len_block[14] = (unsigned char)( ctx->ciphertext_len >> 48 );
|
---|
286 | len_block[15] = (unsigned char)( ctx->ciphertext_len >> 56 );
|
---|
287 |
|
---|
288 | ret = mbedtls_poly1305_update( &ctx->poly1305_ctx, len_block, 16U );
|
---|
289 | if( ret != 0 )
|
---|
290 | return( ret );
|
---|
291 |
|
---|
292 | ret = mbedtls_poly1305_finish( &ctx->poly1305_ctx, mac );
|
---|
293 |
|
---|
294 | return( ret );
|
---|
295 | }
|
---|
296 |
|
---|
297 | static int chachapoly_crypt_and_tag( mbedtls_chachapoly_context *ctx,
|
---|
298 | mbedtls_chachapoly_mode_t mode,
|
---|
299 | size_t length,
|
---|
300 | const unsigned char nonce[12],
|
---|
301 | const unsigned char *aad,
|
---|
302 | size_t aad_len,
|
---|
303 | const unsigned char *input,
|
---|
304 | unsigned char *output,
|
---|
305 | unsigned char tag[16] )
|
---|
306 | {
|
---|
307 | int ret;
|
---|
308 |
|
---|
309 | ret = mbedtls_chachapoly_starts( ctx, nonce, mode );
|
---|
310 | if( ret != 0 )
|
---|
311 | goto cleanup;
|
---|
312 |
|
---|
313 | ret = mbedtls_chachapoly_update_aad( ctx, aad, aad_len );
|
---|
314 | if( ret != 0 )
|
---|
315 | goto cleanup;
|
---|
316 |
|
---|
317 | ret = mbedtls_chachapoly_update( ctx, length, input, output );
|
---|
318 | if( ret != 0 )
|
---|
319 | goto cleanup;
|
---|
320 |
|
---|
321 | ret = mbedtls_chachapoly_finish( ctx, tag );
|
---|
322 |
|
---|
323 | cleanup:
|
---|
324 | return( ret );
|
---|
325 | }
|
---|
326 |
|
---|
327 | int mbedtls_chachapoly_encrypt_and_tag( mbedtls_chachapoly_context *ctx,
|
---|
328 | size_t length,
|
---|
329 | const unsigned char nonce[12],
|
---|
330 | const unsigned char *aad,
|
---|
331 | size_t aad_len,
|
---|
332 | const unsigned char *input,
|
---|
333 | unsigned char *output,
|
---|
334 | unsigned char tag[16] )
|
---|
335 | {
|
---|
336 | CHACHAPOLY_VALIDATE_RET( ctx != NULL );
|
---|
337 | CHACHAPOLY_VALIDATE_RET( nonce != NULL );
|
---|
338 | CHACHAPOLY_VALIDATE_RET( tag != NULL );
|
---|
339 | CHACHAPOLY_VALIDATE_RET( aad_len == 0 || aad != NULL );
|
---|
340 | CHACHAPOLY_VALIDATE_RET( length == 0 || input != NULL );
|
---|
341 | CHACHAPOLY_VALIDATE_RET( length == 0 || output != NULL );
|
---|
342 |
|
---|
343 | return( chachapoly_crypt_and_tag( ctx, MBEDTLS_CHACHAPOLY_ENCRYPT,
|
---|
344 | length, nonce, aad, aad_len,
|
---|
345 | input, output, tag ) );
|
---|
346 | }
|
---|
347 |
|
---|
348 | int mbedtls_chachapoly_auth_decrypt( mbedtls_chachapoly_context *ctx,
|
---|
349 | size_t length,
|
---|
350 | const unsigned char nonce[12],
|
---|
351 | const unsigned char *aad,
|
---|
352 | size_t aad_len,
|
---|
353 | const unsigned char tag[16],
|
---|
354 | const unsigned char *input,
|
---|
355 | unsigned char *output )
|
---|
356 | {
|
---|
357 | int ret;
|
---|
358 | unsigned char check_tag[16];
|
---|
359 | size_t i;
|
---|
360 | int diff;
|
---|
361 | CHACHAPOLY_VALIDATE_RET( ctx != NULL );
|
---|
362 | CHACHAPOLY_VALIDATE_RET( nonce != NULL );
|
---|
363 | CHACHAPOLY_VALIDATE_RET( tag != NULL );
|
---|
364 | CHACHAPOLY_VALIDATE_RET( aad_len == 0 || aad != NULL );
|
---|
365 | CHACHAPOLY_VALIDATE_RET( length == 0 || input != NULL );
|
---|
366 | CHACHAPOLY_VALIDATE_RET( length == 0 || output != NULL );
|
---|
367 |
|
---|
368 | if( ( ret = chachapoly_crypt_and_tag( ctx,
|
---|
369 | MBEDTLS_CHACHAPOLY_DECRYPT, length, nonce,
|
---|
370 | aad, aad_len, input, output, check_tag ) ) != 0 )
|
---|
371 | {
|
---|
372 | return( ret );
|
---|
373 | }
|
---|
374 |
|
---|
375 | /* Check tag in "constant-time" */
|
---|
376 | for( diff = 0, i = 0; i < sizeof( check_tag ); i++ )
|
---|
377 | diff |= tag[i] ^ check_tag[i];
|
---|
378 |
|
---|
379 | if( diff != 0 )
|
---|
380 | {
|
---|
381 | mbedtls_platform_zeroize( output, length );
|
---|
382 | return( MBEDTLS_ERR_CHACHAPOLY_AUTH_FAILED );
|
---|
383 | }
|
---|
384 |
|
---|
385 | return( 0 );
|
---|
386 | }
|
---|
387 |
|
---|
388 | #endif /* MBEDTLS_CHACHAPOLY_ALT */
|
---|
389 |
|
---|
390 | #if defined(MBEDTLS_SELF_TEST)
|
---|
391 |
|
---|
392 | static const unsigned char test_key[1][32] =
|
---|
393 | {
|
---|
394 | {
|
---|
395 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
|
---|
396 | 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
|
---|
397 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
|
---|
398 | 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f
|
---|
399 | }
|
---|
400 | };
|
---|
401 |
|
---|
402 | static const unsigned char test_nonce[1][12] =
|
---|
403 | {
|
---|
404 | {
|
---|
405 | 0x07, 0x00, 0x00, 0x00, /* 32-bit common part */
|
---|
406 | 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47 /* 64-bit IV */
|
---|
407 | }
|
---|
408 | };
|
---|
409 |
|
---|
410 | static const unsigned char test_aad[1][12] =
|
---|
411 | {
|
---|
412 | {
|
---|
413 | 0x50, 0x51, 0x52, 0x53, 0xc0, 0xc1, 0xc2, 0xc3,
|
---|
414 | 0xc4, 0xc5, 0xc6, 0xc7
|
---|
415 | }
|
---|
416 | };
|
---|
417 |
|
---|
418 | static const size_t test_aad_len[1] =
|
---|
419 | {
|
---|
420 | 12U
|
---|
421 | };
|
---|
422 |
|
---|
423 | static const unsigned char test_input[1][114] =
|
---|
424 | {
|
---|
425 | {
|
---|
426 | 0x4c, 0x61, 0x64, 0x69, 0x65, 0x73, 0x20, 0x61,
|
---|
427 | 0x6e, 0x64, 0x20, 0x47, 0x65, 0x6e, 0x74, 0x6c,
|
---|
428 | 0x65, 0x6d, 0x65, 0x6e, 0x20, 0x6f, 0x66, 0x20,
|
---|
429 | 0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x61, 0x73,
|
---|
430 | 0x73, 0x20, 0x6f, 0x66, 0x20, 0x27, 0x39, 0x39,
|
---|
431 | 0x3a, 0x20, 0x49, 0x66, 0x20, 0x49, 0x20, 0x63,
|
---|
432 | 0x6f, 0x75, 0x6c, 0x64, 0x20, 0x6f, 0x66, 0x66,
|
---|
433 | 0x65, 0x72, 0x20, 0x79, 0x6f, 0x75, 0x20, 0x6f,
|
---|
434 | 0x6e, 0x6c, 0x79, 0x20, 0x6f, 0x6e, 0x65, 0x20,
|
---|
435 | 0x74, 0x69, 0x70, 0x20, 0x66, 0x6f, 0x72, 0x20,
|
---|
436 | 0x74, 0x68, 0x65, 0x20, 0x66, 0x75, 0x74, 0x75,
|
---|
437 | 0x72, 0x65, 0x2c, 0x20, 0x73, 0x75, 0x6e, 0x73,
|
---|
438 | 0x63, 0x72, 0x65, 0x65, 0x6e, 0x20, 0x77, 0x6f,
|
---|
439 | 0x75, 0x6c, 0x64, 0x20, 0x62, 0x65, 0x20, 0x69,
|
---|
440 | 0x74, 0x2e
|
---|
441 | }
|
---|
442 | };
|
---|
443 |
|
---|
444 | static const unsigned char test_output[1][114] =
|
---|
445 | {
|
---|
446 | {
|
---|
447 | 0xd3, 0x1a, 0x8d, 0x34, 0x64, 0x8e, 0x60, 0xdb,
|
---|
448 | 0x7b, 0x86, 0xaf, 0xbc, 0x53, 0xef, 0x7e, 0xc2,
|
---|
449 | 0xa4, 0xad, 0xed, 0x51, 0x29, 0x6e, 0x08, 0xfe,
|
---|
450 | 0xa9, 0xe2, 0xb5, 0xa7, 0x36, 0xee, 0x62, 0xd6,
|
---|
451 | 0x3d, 0xbe, 0xa4, 0x5e, 0x8c, 0xa9, 0x67, 0x12,
|
---|
452 | 0x82, 0xfa, 0xfb, 0x69, 0xda, 0x92, 0x72, 0x8b,
|
---|
453 | 0x1a, 0x71, 0xde, 0x0a, 0x9e, 0x06, 0x0b, 0x29,
|
---|
454 | 0x05, 0xd6, 0xa5, 0xb6, 0x7e, 0xcd, 0x3b, 0x36,
|
---|
455 | 0x92, 0xdd, 0xbd, 0x7f, 0x2d, 0x77, 0x8b, 0x8c,
|
---|
456 | 0x98, 0x03, 0xae, 0xe3, 0x28, 0x09, 0x1b, 0x58,
|
---|
457 | 0xfa, 0xb3, 0x24, 0xe4, 0xfa, 0xd6, 0x75, 0x94,
|
---|
458 | 0x55, 0x85, 0x80, 0x8b, 0x48, 0x31, 0xd7, 0xbc,
|
---|
459 | 0x3f, 0xf4, 0xde, 0xf0, 0x8e, 0x4b, 0x7a, 0x9d,
|
---|
460 | 0xe5, 0x76, 0xd2, 0x65, 0x86, 0xce, 0xc6, 0x4b,
|
---|
461 | 0x61, 0x16
|
---|
462 | }
|
---|
463 | };
|
---|
464 |
|
---|
465 | static const size_t test_input_len[1] =
|
---|
466 | {
|
---|
467 | 114U
|
---|
468 | };
|
---|
469 |
|
---|
470 | static const unsigned char test_mac[1][16] =
|
---|
471 | {
|
---|
472 | {
|
---|
473 | 0x1a, 0xe1, 0x0b, 0x59, 0x4f, 0x09, 0xe2, 0x6a,
|
---|
474 | 0x7e, 0x90, 0x2e, 0xcb, 0xd0, 0x60, 0x06, 0x91
|
---|
475 | }
|
---|
476 | };
|
---|
477 |
|
---|
478 | #define ASSERT( cond, args ) \
|
---|
479 | do \
|
---|
480 | { \
|
---|
481 | if( ! ( cond ) ) \
|
---|
482 | { \
|
---|
483 | if( verbose != 0 ) \
|
---|
484 | mbedtls_printf args; \
|
---|
485 | \
|
---|
486 | return( -1 ); \
|
---|
487 | } \
|
---|
488 | } \
|
---|
489 | while( 0 )
|
---|
490 |
|
---|
491 | int mbedtls_chachapoly_self_test( int verbose )
|
---|
492 | {
|
---|
493 | mbedtls_chachapoly_context ctx;
|
---|
494 | unsigned i;
|
---|
495 | int ret;
|
---|
496 | unsigned char output[200];
|
---|
497 | unsigned char mac[16];
|
---|
498 |
|
---|
499 | for( i = 0U; i < 1U; i++ )
|
---|
500 | {
|
---|
501 | if( verbose != 0 )
|
---|
502 | mbedtls_printf( " ChaCha20-Poly1305 test %u ", i );
|
---|
503 |
|
---|
504 | mbedtls_chachapoly_init( &ctx );
|
---|
505 |
|
---|
506 | ret = mbedtls_chachapoly_setkey( &ctx, test_key[i] );
|
---|
507 | ASSERT( 0 == ret, ( "setkey() error code: %i\n", ret ) );
|
---|
508 |
|
---|
509 | ret = mbedtls_chachapoly_encrypt_and_tag( &ctx,
|
---|
510 | test_input_len[i],
|
---|
511 | test_nonce[i],
|
---|
512 | test_aad[i],
|
---|
513 | test_aad_len[i],
|
---|
514 | test_input[i],
|
---|
515 | output,
|
---|
516 | mac );
|
---|
517 |
|
---|
518 | ASSERT( 0 == ret, ( "crypt_and_tag() error code: %i\n", ret ) );
|
---|
519 |
|
---|
520 | ASSERT( 0 == memcmp( output, test_output[i], test_input_len[i] ),
|
---|
521 | ( "failure (wrong output)\n" ) );
|
---|
522 |
|
---|
523 | ASSERT( 0 == memcmp( mac, test_mac[i], 16U ),
|
---|
524 | ( "failure (wrong MAC)\n" ) );
|
---|
525 |
|
---|
526 | mbedtls_chachapoly_free( &ctx );
|
---|
527 |
|
---|
528 | if( verbose != 0 )
|
---|
529 | mbedtls_printf( "passed\n" );
|
---|
530 | }
|
---|
531 |
|
---|
532 | if( verbose != 0 )
|
---|
533 | mbedtls_printf( "\n" );
|
---|
534 |
|
---|
535 | return( 0 );
|
---|
536 | }
|
---|
537 |
|
---|
538 | #endif /* MBEDTLS_SELF_TEST */
|
---|
539 |
|
---|
540 | #endif /* MBEDTLS_CHACHAPOLY_C */
|
---|