Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
8774 | rgimad | 1 | /* |
2 | * Public Key abstraction layer |
||
3 | * |
||
4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved |
||
5 | * SPDX-License-Identifier: GPL-2.0 |
||
6 | * |
||
7 | * This program is free software; you can redistribute it and/or modify |
||
8 | * it under the terms of the GNU General Public License as published by |
||
9 | * the Free Software Foundation; either version 2 of the License, or |
||
10 | * (at your option) any later version. |
||
11 | * |
||
12 | * This program is distributed in the hope that it will be useful, |
||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||
15 | * GNU General Public License for more details. |
||
16 | * |
||
17 | * You should have received a copy of the GNU General Public License along |
||
18 | * with this program; if not, write to the Free Software Foundation, Inc., |
||
19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
||
20 | * |
||
21 | * This file is part of mbed TLS (https://tls.mbed.org) |
||
22 | */ |
||
23 | |||
24 | #if !defined(MBEDTLS_CONFIG_FILE) |
||
25 | #include "mbedtls/config.h" |
||
26 | #else |
||
27 | #include MBEDTLS_CONFIG_FILE |
||
28 | #endif |
||
29 | |||
30 | #if defined(MBEDTLS_PK_C) |
||
31 | #include "mbedtls/pk.h" |
||
32 | #include "mbedtls/pk_internal.h" |
||
33 | |||
34 | #include "mbedtls/platform_util.h" |
||
35 | |||
36 | #if defined(MBEDTLS_RSA_C) |
||
37 | #include "mbedtls/rsa.h" |
||
38 | #endif |
||
39 | #if defined(MBEDTLS_ECP_C) |
||
40 | #include "mbedtls/ecp.h" |
||
41 | #endif |
||
42 | #if defined(MBEDTLS_ECDSA_C) |
||
43 | #include "mbedtls/ecdsa.h" |
||
44 | #endif |
||
45 | |||
46 | #include |
||
47 | #include |
||
48 | |||
49 | /* Parameter validation macros based on platform_util.h */ |
||
50 | #define PK_VALIDATE_RET( cond ) \ |
||
51 | MBEDTLS_INTERNAL_VALIDATE_RET( cond, MBEDTLS_ERR_PK_BAD_INPUT_DATA ) |
||
52 | #define PK_VALIDATE( cond ) \ |
||
53 | MBEDTLS_INTERNAL_VALIDATE( cond ) |
||
54 | |||
55 | /* |
||
56 | * Initialise a mbedtls_pk_context |
||
57 | */ |
||
58 | void mbedtls_pk_init( mbedtls_pk_context *ctx ) |
||
59 | { |
||
60 | PK_VALIDATE( ctx != NULL ); |
||
61 | |||
62 | ctx->pk_info = NULL; |
||
63 | ctx->pk_ctx = NULL; |
||
64 | } |
||
65 | |||
66 | /* |
||
67 | * Free (the components of) a mbedtls_pk_context |
||
68 | */ |
||
69 | void mbedtls_pk_free( mbedtls_pk_context *ctx ) |
||
70 | { |
||
71 | if( ctx == NULL ) |
||
72 | return; |
||
73 | |||
74 | if ( ctx->pk_info != NULL ) |
||
75 | ctx->pk_info->ctx_free_func( ctx->pk_ctx ); |
||
76 | |||
77 | mbedtls_platform_zeroize( ctx, sizeof( mbedtls_pk_context ) ); |
||
78 | } |
||
79 | |||
80 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
||
81 | /* |
||
82 | * Initialize a restart context |
||
83 | */ |
||
84 | void mbedtls_pk_restart_init( mbedtls_pk_restart_ctx *ctx ) |
||
85 | { |
||
86 | PK_VALIDATE( ctx != NULL ); |
||
87 | ctx->pk_info = NULL; |
||
88 | ctx->rs_ctx = NULL; |
||
89 | } |
||
90 | |||
91 | /* |
||
92 | * Free the components of a restart context |
||
93 | */ |
||
94 | void mbedtls_pk_restart_free( mbedtls_pk_restart_ctx *ctx ) |
||
95 | { |
||
96 | if( ctx == NULL || ctx->pk_info == NULL || |
||
97 | ctx->pk_info->rs_free_func == NULL ) |
||
98 | { |
||
99 | return; |
||
100 | } |
||
101 | |||
102 | ctx->pk_info->rs_free_func( ctx->rs_ctx ); |
||
103 | |||
104 | ctx->pk_info = NULL; |
||
105 | ctx->rs_ctx = NULL; |
||
106 | } |
||
107 | #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
||
108 | |||
109 | /* |
||
110 | * Get pk_info structure from type |
||
111 | */ |
||
112 | const mbedtls_pk_info_t * mbedtls_pk_info_from_type( mbedtls_pk_type_t pk_type ) |
||
113 | { |
||
114 | switch( pk_type ) { |
||
115 | #if defined(MBEDTLS_RSA_C) |
||
116 | case MBEDTLS_PK_RSA: |
||
117 | return( &mbedtls_rsa_info ); |
||
118 | #endif |
||
119 | #if defined(MBEDTLS_ECP_C) |
||
120 | case MBEDTLS_PK_ECKEY: |
||
121 | return( &mbedtls_eckey_info ); |
||
122 | case MBEDTLS_PK_ECKEY_DH: |
||
123 | return( &mbedtls_eckeydh_info ); |
||
124 | #endif |
||
125 | #if defined(MBEDTLS_ECDSA_C) |
||
126 | case MBEDTLS_PK_ECDSA: |
||
127 | return( &mbedtls_ecdsa_info ); |
||
128 | #endif |
||
129 | /* MBEDTLS_PK_RSA_ALT omitted on purpose */ |
||
130 | default: |
||
131 | return( NULL ); |
||
132 | } |
||
133 | } |
||
134 | |||
135 | /* |
||
136 | * Initialise context |
||
137 | */ |
||
138 | int mbedtls_pk_setup( mbedtls_pk_context *ctx, const mbedtls_pk_info_t *info ) |
||
139 | { |
||
140 | PK_VALIDATE_RET( ctx != NULL ); |
||
141 | if( info == NULL || ctx->pk_info != NULL ) |
||
142 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
143 | |||
144 | if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL ) |
||
145 | return( MBEDTLS_ERR_PK_ALLOC_FAILED ); |
||
146 | |||
147 | ctx->pk_info = info; |
||
148 | |||
149 | return( 0 ); |
||
150 | } |
||
151 | |||
152 | #if defined(MBEDTLS_PK_RSA_ALT_SUPPORT) |
||
153 | /* |
||
154 | * Initialize an RSA-alt context |
||
155 | */ |
||
156 | int mbedtls_pk_setup_rsa_alt( mbedtls_pk_context *ctx, void * key, |
||
157 | mbedtls_pk_rsa_alt_decrypt_func decrypt_func, |
||
158 | mbedtls_pk_rsa_alt_sign_func sign_func, |
||
159 | mbedtls_pk_rsa_alt_key_len_func key_len_func ) |
||
160 | { |
||
161 | mbedtls_rsa_alt_context *rsa_alt; |
||
162 | const mbedtls_pk_info_t *info = &mbedtls_rsa_alt_info; |
||
163 | |||
164 | PK_VALIDATE_RET( ctx != NULL ); |
||
165 | if( ctx->pk_info != NULL ) |
||
166 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
167 | |||
168 | if( ( ctx->pk_ctx = info->ctx_alloc_func() ) == NULL ) |
||
169 | return( MBEDTLS_ERR_PK_ALLOC_FAILED ); |
||
170 | |||
171 | ctx->pk_info = info; |
||
172 | |||
173 | rsa_alt = (mbedtls_rsa_alt_context *) ctx->pk_ctx; |
||
174 | |||
175 | rsa_alt->key = key; |
||
176 | rsa_alt->decrypt_func = decrypt_func; |
||
177 | rsa_alt->sign_func = sign_func; |
||
178 | rsa_alt->key_len_func = key_len_func; |
||
179 | |||
180 | return( 0 ); |
||
181 | } |
||
182 | #endif /* MBEDTLS_PK_RSA_ALT_SUPPORT */ |
||
183 | |||
184 | /* |
||
185 | * Tell if a PK can do the operations of the given type |
||
186 | */ |
||
187 | int mbedtls_pk_can_do( const mbedtls_pk_context *ctx, mbedtls_pk_type_t type ) |
||
188 | { |
||
189 | /* A context with null pk_info is not set up yet and can't do anything. |
||
190 | * For backward compatibility, also accept NULL instead of a context |
||
191 | * pointer. */ |
||
192 | if( ctx == NULL || ctx->pk_info == NULL ) |
||
193 | return( 0 ); |
||
194 | |||
195 | return( ctx->pk_info->can_do( type ) ); |
||
196 | } |
||
197 | |||
198 | /* |
||
199 | * Helper for mbedtls_pk_sign and mbedtls_pk_verify |
||
200 | */ |
||
201 | static inline int pk_hashlen_helper( mbedtls_md_type_t md_alg, size_t *hash_len ) |
||
202 | { |
||
203 | const mbedtls_md_info_t *md_info; |
||
204 | |||
205 | if( *hash_len != 0 ) |
||
206 | return( 0 ); |
||
207 | |||
208 | if( ( md_info = mbedtls_md_info_from_type( md_alg ) ) == NULL ) |
||
209 | return( -1 ); |
||
210 | |||
211 | *hash_len = mbedtls_md_get_size( md_info ); |
||
212 | return( 0 ); |
||
213 | } |
||
214 | |||
215 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
||
216 | /* |
||
217 | * Helper to set up a restart context if needed |
||
218 | */ |
||
219 | static int pk_restart_setup( mbedtls_pk_restart_ctx *ctx, |
||
220 | const mbedtls_pk_info_t *info ) |
||
221 | { |
||
222 | /* Don't do anything if already set up or invalid */ |
||
223 | if( ctx == NULL || ctx->pk_info != NULL ) |
||
224 | return( 0 ); |
||
225 | |||
226 | /* Should never happen when we're called */ |
||
227 | if( info->rs_alloc_func == NULL || info->rs_free_func == NULL ) |
||
228 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
229 | |||
230 | if( ( ctx->rs_ctx = info->rs_alloc_func() ) == NULL ) |
||
231 | return( MBEDTLS_ERR_PK_ALLOC_FAILED ); |
||
232 | |||
233 | ctx->pk_info = info; |
||
234 | |||
235 | return( 0 ); |
||
236 | } |
||
237 | #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
||
238 | |||
239 | /* |
||
240 | * Verify a signature (restartable) |
||
241 | */ |
||
242 | int mbedtls_pk_verify_restartable( mbedtls_pk_context *ctx, |
||
243 | mbedtls_md_type_t md_alg, |
||
244 | const unsigned char *hash, size_t hash_len, |
||
245 | const unsigned char *sig, size_t sig_len, |
||
246 | mbedtls_pk_restart_ctx *rs_ctx ) |
||
247 | { |
||
248 | PK_VALIDATE_RET( ctx != NULL ); |
||
249 | PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) || |
||
250 | hash != NULL ); |
||
251 | PK_VALIDATE_RET( sig != NULL ); |
||
252 | |||
253 | if( ctx->pk_info == NULL || |
||
254 | pk_hashlen_helper( md_alg, &hash_len ) != 0 ) |
||
255 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
256 | |||
257 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
||
258 | /* optimization: use non-restartable version if restart disabled */ |
||
259 | if( rs_ctx != NULL && |
||
260 | mbedtls_ecp_restart_is_enabled() && |
||
261 | ctx->pk_info->verify_rs_func != NULL ) |
||
262 | { |
||
263 | int ret; |
||
264 | |||
265 | if( ( ret = pk_restart_setup( rs_ctx, ctx->pk_info ) ) != 0 ) |
||
266 | return( ret ); |
||
267 | |||
268 | ret = ctx->pk_info->verify_rs_func( ctx->pk_ctx, |
||
269 | md_alg, hash, hash_len, sig, sig_len, rs_ctx->rs_ctx ); |
||
270 | |||
271 | if( ret != MBEDTLS_ERR_ECP_IN_PROGRESS ) |
||
272 | mbedtls_pk_restart_free( rs_ctx ); |
||
273 | |||
274 | return( ret ); |
||
275 | } |
||
276 | #else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
||
277 | (void) rs_ctx; |
||
278 | #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
||
279 | |||
280 | if( ctx->pk_info->verify_func == NULL ) |
||
281 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH ); |
||
282 | |||
283 | return( ctx->pk_info->verify_func( ctx->pk_ctx, md_alg, hash, hash_len, |
||
284 | sig, sig_len ) ); |
||
285 | } |
||
286 | |||
287 | /* |
||
288 | * Verify a signature |
||
289 | */ |
||
290 | int mbedtls_pk_verify( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg, |
||
291 | const unsigned char *hash, size_t hash_len, |
||
292 | const unsigned char *sig, size_t sig_len ) |
||
293 | { |
||
294 | return( mbedtls_pk_verify_restartable( ctx, md_alg, hash, hash_len, |
||
295 | sig, sig_len, NULL ) ); |
||
296 | } |
||
297 | |||
298 | /* |
||
299 | * Verify a signature with options |
||
300 | */ |
||
301 | int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options, |
||
302 | mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg, |
||
303 | const unsigned char *hash, size_t hash_len, |
||
304 | const unsigned char *sig, size_t sig_len ) |
||
305 | { |
||
306 | PK_VALIDATE_RET( ctx != NULL ); |
||
307 | PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) || |
||
308 | hash != NULL ); |
||
309 | PK_VALIDATE_RET( sig != NULL ); |
||
310 | |||
311 | if( ctx->pk_info == NULL ) |
||
312 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
313 | |||
314 | if( ! mbedtls_pk_can_do( ctx, type ) ) |
||
315 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH ); |
||
316 | |||
317 | if( type == MBEDTLS_PK_RSASSA_PSS ) |
||
318 | { |
||
319 | #if defined(MBEDTLS_RSA_C) && defined(MBEDTLS_PKCS1_V21) |
||
320 | int ret; |
||
321 | const mbedtls_pk_rsassa_pss_options *pss_opts; |
||
322 | |||
323 | #if SIZE_MAX > UINT_MAX |
||
324 | if( md_alg == MBEDTLS_MD_NONE && UINT_MAX < hash_len ) |
||
325 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
326 | #endif /* SIZE_MAX > UINT_MAX */ |
||
327 | |||
328 | if( options == NULL ) |
||
329 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
330 | |||
331 | pss_opts = (const mbedtls_pk_rsassa_pss_options *) options; |
||
332 | |||
333 | if( sig_len < mbedtls_pk_get_len( ctx ) ) |
||
334 | return( MBEDTLS_ERR_RSA_VERIFY_FAILED ); |
||
335 | |||
336 | ret = mbedtls_rsa_rsassa_pss_verify_ext( mbedtls_pk_rsa( *ctx ), |
||
337 | NULL, NULL, MBEDTLS_RSA_PUBLIC, |
||
338 | md_alg, (unsigned int) hash_len, hash, |
||
339 | pss_opts->mgf1_hash_id, |
||
340 | pss_opts->expected_salt_len, |
||
341 | sig ); |
||
342 | if( ret != 0 ) |
||
343 | return( ret ); |
||
344 | |||
345 | if( sig_len > mbedtls_pk_get_len( ctx ) ) |
||
346 | return( MBEDTLS_ERR_PK_SIG_LEN_MISMATCH ); |
||
347 | |||
348 | return( 0 ); |
||
349 | #else |
||
350 | return( MBEDTLS_ERR_PK_FEATURE_UNAVAILABLE ); |
||
351 | #endif /* MBEDTLS_RSA_C && MBEDTLS_PKCS1_V21 */ |
||
352 | } |
||
353 | |||
354 | /* General case: no options */ |
||
355 | if( options != NULL ) |
||
356 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
357 | |||
358 | return( mbedtls_pk_verify( ctx, md_alg, hash, hash_len, sig, sig_len ) ); |
||
359 | } |
||
360 | |||
361 | /* |
||
362 | * Make a signature (restartable) |
||
363 | */ |
||
364 | int mbedtls_pk_sign_restartable( mbedtls_pk_context *ctx, |
||
365 | mbedtls_md_type_t md_alg, |
||
366 | const unsigned char *hash, size_t hash_len, |
||
367 | unsigned char *sig, size_t *sig_len, |
||
368 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng, |
||
369 | mbedtls_pk_restart_ctx *rs_ctx ) |
||
370 | { |
||
371 | PK_VALIDATE_RET( ctx != NULL ); |
||
372 | PK_VALIDATE_RET( ( md_alg == MBEDTLS_MD_NONE && hash_len == 0 ) || |
||
373 | hash != NULL ); |
||
374 | PK_VALIDATE_RET( sig != NULL ); |
||
375 | |||
376 | if( ctx->pk_info == NULL || |
||
377 | pk_hashlen_helper( md_alg, &hash_len ) != 0 ) |
||
378 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
379 | |||
380 | #if defined(MBEDTLS_ECDSA_C) && defined(MBEDTLS_ECP_RESTARTABLE) |
||
381 | /* optimization: use non-restartable version if restart disabled */ |
||
382 | if( rs_ctx != NULL && |
||
383 | mbedtls_ecp_restart_is_enabled() && |
||
384 | ctx->pk_info->sign_rs_func != NULL ) |
||
385 | { |
||
386 | int ret; |
||
387 | |||
388 | if( ( ret = pk_restart_setup( rs_ctx, ctx->pk_info ) ) != 0 ) |
||
389 | return( ret ); |
||
390 | |||
391 | ret = ctx->pk_info->sign_rs_func( ctx->pk_ctx, md_alg, |
||
392 | hash, hash_len, sig, sig_len, f_rng, p_rng, rs_ctx->rs_ctx ); |
||
393 | |||
394 | if( ret != MBEDTLS_ERR_ECP_IN_PROGRESS ) |
||
395 | mbedtls_pk_restart_free( rs_ctx ); |
||
396 | |||
397 | return( ret ); |
||
398 | } |
||
399 | #else /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
||
400 | (void) rs_ctx; |
||
401 | #endif /* MBEDTLS_ECDSA_C && MBEDTLS_ECP_RESTARTABLE */ |
||
402 | |||
403 | if( ctx->pk_info->sign_func == NULL ) |
||
404 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH ); |
||
405 | |||
406 | return( ctx->pk_info->sign_func( ctx->pk_ctx, md_alg, hash, hash_len, |
||
407 | sig, sig_len, f_rng, p_rng ) ); |
||
408 | } |
||
409 | |||
410 | /* |
||
411 | * Make a signature |
||
412 | */ |
||
413 | int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg, |
||
414 | const unsigned char *hash, size_t hash_len, |
||
415 | unsigned char *sig, size_t *sig_len, |
||
416 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) |
||
417 | { |
||
418 | return( mbedtls_pk_sign_restartable( ctx, md_alg, hash, hash_len, |
||
419 | sig, sig_len, f_rng, p_rng, NULL ) ); |
||
420 | } |
||
421 | |||
422 | /* |
||
423 | * Decrypt message |
||
424 | */ |
||
425 | int mbedtls_pk_decrypt( mbedtls_pk_context *ctx, |
||
426 | const unsigned char *input, size_t ilen, |
||
427 | unsigned char *output, size_t *olen, size_t osize, |
||
428 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) |
||
429 | { |
||
430 | PK_VALIDATE_RET( ctx != NULL ); |
||
431 | PK_VALIDATE_RET( input != NULL || ilen == 0 ); |
||
432 | PK_VALIDATE_RET( output != NULL || osize == 0 ); |
||
433 | PK_VALIDATE_RET( olen != NULL ); |
||
434 | |||
435 | if( ctx->pk_info == NULL ) |
||
436 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
437 | |||
438 | if( ctx->pk_info->decrypt_func == NULL ) |
||
439 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH ); |
||
440 | |||
441 | return( ctx->pk_info->decrypt_func( ctx->pk_ctx, input, ilen, |
||
442 | output, olen, osize, f_rng, p_rng ) ); |
||
443 | } |
||
444 | |||
445 | /* |
||
446 | * Encrypt message |
||
447 | */ |
||
448 | int mbedtls_pk_encrypt( mbedtls_pk_context *ctx, |
||
449 | const unsigned char *input, size_t ilen, |
||
450 | unsigned char *output, size_t *olen, size_t osize, |
||
451 | int (*f_rng)(void *, unsigned char *, size_t), void *p_rng ) |
||
452 | { |
||
453 | PK_VALIDATE_RET( ctx != NULL ); |
||
454 | PK_VALIDATE_RET( input != NULL || ilen == 0 ); |
||
455 | PK_VALIDATE_RET( output != NULL || osize == 0 ); |
||
456 | PK_VALIDATE_RET( olen != NULL ); |
||
457 | |||
458 | if( ctx->pk_info == NULL ) |
||
459 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
460 | |||
461 | if( ctx->pk_info->encrypt_func == NULL ) |
||
462 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH ); |
||
463 | |||
464 | return( ctx->pk_info->encrypt_func( ctx->pk_ctx, input, ilen, |
||
465 | output, olen, osize, f_rng, p_rng ) ); |
||
466 | } |
||
467 | |||
468 | /* |
||
469 | * Check public-private key pair |
||
470 | */ |
||
471 | int mbedtls_pk_check_pair( const mbedtls_pk_context *pub, const mbedtls_pk_context *prv ) |
||
472 | { |
||
473 | PK_VALIDATE_RET( pub != NULL ); |
||
474 | PK_VALIDATE_RET( prv != NULL ); |
||
475 | |||
476 | if( pub->pk_info == NULL || |
||
477 | prv->pk_info == NULL || |
||
478 | prv->pk_info->check_pair_func == NULL ) |
||
479 | { |
||
480 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
481 | } |
||
482 | |||
483 | if( prv->pk_info->type == MBEDTLS_PK_RSA_ALT ) |
||
484 | { |
||
485 | if( pub->pk_info->type != MBEDTLS_PK_RSA ) |
||
486 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH ); |
||
487 | } |
||
488 | else |
||
489 | { |
||
490 | if( pub->pk_info != prv->pk_info ) |
||
491 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH ); |
||
492 | } |
||
493 | |||
494 | return( prv->pk_info->check_pair_func( pub->pk_ctx, prv->pk_ctx ) ); |
||
495 | } |
||
496 | |||
497 | /* |
||
498 | * Get key size in bits |
||
499 | */ |
||
500 | size_t mbedtls_pk_get_bitlen( const mbedtls_pk_context *ctx ) |
||
501 | { |
||
502 | /* For backward compatibility, accept NULL or a context that |
||
503 | * isn't set up yet, and return a fake value that should be safe. */ |
||
504 | if( ctx == NULL || ctx->pk_info == NULL ) |
||
505 | return( 0 ); |
||
506 | |||
507 | return( ctx->pk_info->get_bitlen( ctx->pk_ctx ) ); |
||
508 | } |
||
509 | |||
510 | /* |
||
511 | * Export debug information |
||
512 | */ |
||
513 | int mbedtls_pk_debug( const mbedtls_pk_context *ctx, mbedtls_pk_debug_item *items ) |
||
514 | { |
||
515 | PK_VALIDATE_RET( ctx != NULL ); |
||
516 | if( ctx->pk_info == NULL ) |
||
517 | return( MBEDTLS_ERR_PK_BAD_INPUT_DATA ); |
||
518 | |||
519 | if( ctx->pk_info->debug_func == NULL ) |
||
520 | return( MBEDTLS_ERR_PK_TYPE_MISMATCH ); |
||
521 | |||
522 | ctx->pk_info->debug_func( ctx->pk_ctx, items ); |
||
523 | return( 0 ); |
||
524 | } |
||
525 | |||
526 | /* |
||
527 | * Access the PK type name |
||
528 | */ |
||
529 | const char *mbedtls_pk_get_name( const mbedtls_pk_context *ctx ) |
||
530 | { |
||
531 | if( ctx == NULL || ctx->pk_info == NULL ) |
||
532 | return( "invalid PK" ); |
||
533 | |||
534 | return( ctx->pk_info->name ); |
||
535 | } |
||
536 | |||
537 | /* |
||
538 | * Access the PK type |
||
539 | */ |
||
540 | mbedtls_pk_type_t mbedtls_pk_get_type( const mbedtls_pk_context *ctx ) |
||
541 | { |
||
542 | if( ctx == NULL || ctx->pk_info == NULL ) |
||
543 | return( MBEDTLS_PK_NONE ); |
||
544 | |||
545 | return( ctx->pk_info->type ); |
||
546 | } |
||
547 | |||
548 | #endif /* MBEDTLS_PK_C */>> |