1 | /* rsa.c
|
---|
2 | *
|
---|
3 | * Copyright (C) 2006-2020 wolfSSL Inc.
|
---|
4 | *
|
---|
5 | * This file is part of wolfSSL.
|
---|
6 | *
|
---|
7 | * wolfSSL 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 | * wolfSSL 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
|
---|
18 | * along with this program; if not, write to the Free Software
|
---|
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
|
---|
20 | */
|
---|
21 |
|
---|
22 |
|
---|
23 | #ifdef HAVE_CONFIG_H
|
---|
24 | #include <config.h>
|
---|
25 | #endif
|
---|
26 |
|
---|
27 | #include <wolfssl/wolfcrypt/settings.h>
|
---|
28 | #include <wolfssl/wolfcrypt/error-crypt.h>
|
---|
29 |
|
---|
30 | #ifndef NO_RSA
|
---|
31 |
|
---|
32 | #if defined(HAVE_FIPS) && \
|
---|
33 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
|
---|
34 |
|
---|
35 | /* set NO_WRAPPERS before headers, use direct internal f()s not wrappers */
|
---|
36 | #define FIPS_NO_WRAPPERS
|
---|
37 |
|
---|
38 | #ifdef USE_WINDOWS_API
|
---|
39 | #pragma code_seg(".fipsA$e")
|
---|
40 | #pragma const_seg(".fipsB$e")
|
---|
41 | #endif
|
---|
42 | #endif
|
---|
43 |
|
---|
44 | #include <wolfssl/wolfcrypt/rsa.h>
|
---|
45 |
|
---|
46 | #ifdef WOLFSSL_AFALG_XILINX_RSA
|
---|
47 | #include <wolfssl/wolfcrypt/port/af_alg/wc_afalg.h>
|
---|
48 | #endif
|
---|
49 |
|
---|
50 | #ifdef WOLFSSL_HAVE_SP_RSA
|
---|
51 | #include <wolfssl/wolfcrypt/sp.h>
|
---|
52 | #endif
|
---|
53 |
|
---|
54 | /*
|
---|
55 | Possible RSA enable options:
|
---|
56 | * NO_RSA: Overall control of RSA default: on (not defined)
|
---|
57 | * WC_RSA_BLINDING: Uses Blinding w/ Private Ops default: off
|
---|
58 | Note: slower by ~20%
|
---|
59 | * WOLFSSL_KEY_GEN: Allows Private Key Generation default: off
|
---|
60 | * RSA_LOW_MEM: NON CRT Private Operations, less memory default: off
|
---|
61 | * WC_NO_RSA_OAEP: Disables RSA OAEP padding default: on (not defined)
|
---|
62 | * WC_RSA_NONBLOCK: Enables support for RSA non-blocking default: off
|
---|
63 | * WC_RSA_NONBLOCK_TIME:Enables support for time based blocking default: off
|
---|
64 | * time calculation.
|
---|
65 | */
|
---|
66 |
|
---|
67 | /*
|
---|
68 | RSA Key Size Configuration:
|
---|
69 | * FP_MAX_BITS: With USE_FAST_MATH only default: 4096
|
---|
70 | If USE_FAST_MATH then use this to override default.
|
---|
71 | Value is key size * 2. Example: RSA 3072 = 6144
|
---|
72 | */
|
---|
73 |
|
---|
74 |
|
---|
75 | /* If building for old FIPS. */
|
---|
76 | #if defined(HAVE_FIPS) && \
|
---|
77 | (!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2))
|
---|
78 |
|
---|
79 | int wc_InitRsaKey(RsaKey* key, void* ptr)
|
---|
80 | {
|
---|
81 | if (key == NULL) {
|
---|
82 | return BAD_FUNC_ARG;
|
---|
83 | }
|
---|
84 |
|
---|
85 | return InitRsaKey_fips(key, ptr);
|
---|
86 | }
|
---|
87 |
|
---|
88 |
|
---|
89 | int wc_InitRsaKey_ex(RsaKey* key, void* ptr, int devId)
|
---|
90 | {
|
---|
91 | (void)devId;
|
---|
92 | if (key == NULL) {
|
---|
93 | return BAD_FUNC_ARG;
|
---|
94 | }
|
---|
95 | return InitRsaKey_fips(key, ptr);
|
---|
96 | }
|
---|
97 |
|
---|
98 |
|
---|
99 | int wc_FreeRsaKey(RsaKey* key)
|
---|
100 | {
|
---|
101 | return FreeRsaKey_fips(key);
|
---|
102 | }
|
---|
103 |
|
---|
104 |
|
---|
105 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
106 | int wc_RsaPublicEncrypt(const byte* in, word32 inLen, byte* out,
|
---|
107 | word32 outLen, RsaKey* key, WC_RNG* rng)
|
---|
108 | {
|
---|
109 | if (in == NULL || out == NULL || key == NULL || rng == NULL) {
|
---|
110 | return BAD_FUNC_ARG;
|
---|
111 | }
|
---|
112 | return RsaPublicEncrypt_fips(in, inLen, out, outLen, key, rng);
|
---|
113 | }
|
---|
114 | #endif
|
---|
115 |
|
---|
116 |
|
---|
117 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
118 | int wc_RsaPrivateDecryptInline(byte* in, word32 inLen, byte** out,
|
---|
119 | RsaKey* key)
|
---|
120 | {
|
---|
121 | if (in == NULL || out == NULL || key == NULL) {
|
---|
122 | return BAD_FUNC_ARG;
|
---|
123 | }
|
---|
124 | return RsaPrivateDecryptInline_fips(in, inLen, out, key);
|
---|
125 | }
|
---|
126 |
|
---|
127 |
|
---|
128 | int wc_RsaPrivateDecrypt(const byte* in, word32 inLen, byte* out,
|
---|
129 | word32 outLen, RsaKey* key)
|
---|
130 | {
|
---|
131 | if (in == NULL || out == NULL || key == NULL) {
|
---|
132 | return BAD_FUNC_ARG;
|
---|
133 | }
|
---|
134 | return RsaPrivateDecrypt_fips(in, inLen, out, outLen, key);
|
---|
135 | }
|
---|
136 |
|
---|
137 |
|
---|
138 | int wc_RsaSSL_Sign(const byte* in, word32 inLen, byte* out,
|
---|
139 | word32 outLen, RsaKey* key, WC_RNG* rng)
|
---|
140 | {
|
---|
141 | if (in == NULL || out == NULL || key == NULL || inLen == 0) {
|
---|
142 | return BAD_FUNC_ARG;
|
---|
143 | }
|
---|
144 | return RsaSSL_Sign_fips(in, inLen, out, outLen, key, rng);
|
---|
145 | }
|
---|
146 | #endif
|
---|
147 |
|
---|
148 |
|
---|
149 | int wc_RsaSSL_VerifyInline(byte* in, word32 inLen, byte** out, RsaKey* key)
|
---|
150 | {
|
---|
151 | if (in == NULL || out == NULL || key == NULL) {
|
---|
152 | return BAD_FUNC_ARG;
|
---|
153 | }
|
---|
154 | return RsaSSL_VerifyInline_fips(in, inLen, out, key);
|
---|
155 | }
|
---|
156 |
|
---|
157 |
|
---|
158 | int wc_RsaSSL_Verify(const byte* in, word32 inLen, byte* out,
|
---|
159 | word32 outLen, RsaKey* key)
|
---|
160 | {
|
---|
161 | if (in == NULL || out == NULL || key == NULL || inLen == 0) {
|
---|
162 | return BAD_FUNC_ARG;
|
---|
163 | }
|
---|
164 | return RsaSSL_Verify_fips(in, inLen, out, outLen, key);
|
---|
165 | }
|
---|
166 |
|
---|
167 |
|
---|
168 | int wc_RsaEncryptSize(RsaKey* key)
|
---|
169 | {
|
---|
170 | if (key == NULL) {
|
---|
171 | return BAD_FUNC_ARG;
|
---|
172 | }
|
---|
173 | return RsaEncryptSize_fips(key);
|
---|
174 | }
|
---|
175 |
|
---|
176 |
|
---|
177 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
178 | int wc_RsaFlattenPublicKey(RsaKey* key, byte* a, word32* aSz, byte* b,
|
---|
179 | word32* bSz)
|
---|
180 | {
|
---|
181 |
|
---|
182 | /* not specified as fips so not needing _fips */
|
---|
183 | return RsaFlattenPublicKey(key, a, aSz, b, bSz);
|
---|
184 | }
|
---|
185 | #endif
|
---|
186 |
|
---|
187 |
|
---|
188 | #ifdef WOLFSSL_KEY_GEN
|
---|
189 | int wc_MakeRsaKey(RsaKey* key, int size, long e, WC_RNG* rng)
|
---|
190 | {
|
---|
191 | return MakeRsaKey(key, size, e, rng);
|
---|
192 | }
|
---|
193 | #endif
|
---|
194 |
|
---|
195 |
|
---|
196 | /* these are functions in asn and are routed to wolfssl/wolfcrypt/asn.c
|
---|
197 | * wc_RsaPrivateKeyDecode
|
---|
198 | * wc_RsaPublicKeyDecode
|
---|
199 | */
|
---|
200 |
|
---|
201 | #else /* else build without fips, or for new fips */
|
---|
202 |
|
---|
203 | #include <wolfssl/wolfcrypt/random.h>
|
---|
204 | #include <wolfssl/wolfcrypt/logging.h>
|
---|
205 | #ifdef WOLF_CRYPTO_CB
|
---|
206 | #include <wolfssl/wolfcrypt/cryptocb.h>
|
---|
207 | #endif
|
---|
208 | #ifdef NO_INLINE
|
---|
209 | #include <wolfssl/wolfcrypt/misc.h>
|
---|
210 | #else
|
---|
211 | #define WOLFSSL_MISC_INCLUDED
|
---|
212 | #include <wolfcrypt/src/misc.c>
|
---|
213 | #endif
|
---|
214 |
|
---|
215 |
|
---|
216 | enum {
|
---|
217 | RSA_STATE_NONE = 0,
|
---|
218 |
|
---|
219 | RSA_STATE_ENCRYPT_PAD,
|
---|
220 | RSA_STATE_ENCRYPT_EXPTMOD,
|
---|
221 | RSA_STATE_ENCRYPT_RES,
|
---|
222 |
|
---|
223 | RSA_STATE_DECRYPT_EXPTMOD,
|
---|
224 | RSA_STATE_DECRYPT_UNPAD,
|
---|
225 | RSA_STATE_DECRYPT_RES,
|
---|
226 | };
|
---|
227 |
|
---|
228 |
|
---|
229 | static void wc_RsaCleanup(RsaKey* key)
|
---|
230 | {
|
---|
231 | #ifndef WOLFSSL_RSA_VERIFY_INLINE
|
---|
232 | if (key && key->data) {
|
---|
233 | /* make sure any allocated memory is free'd */
|
---|
234 | if (key->dataIsAlloc) {
|
---|
235 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
236 | if (key->type == RSA_PRIVATE_DECRYPT ||
|
---|
237 | key->type == RSA_PRIVATE_ENCRYPT) {
|
---|
238 | ForceZero(key->data, key->dataLen);
|
---|
239 | }
|
---|
240 | #endif
|
---|
241 | XFREE(key->data, key->heap, DYNAMIC_TYPE_WOLF_BIGINT);
|
---|
242 | key->dataIsAlloc = 0;
|
---|
243 | }
|
---|
244 | key->data = NULL;
|
---|
245 | key->dataLen = 0;
|
---|
246 | }
|
---|
247 | #else
|
---|
248 | (void)key;
|
---|
249 | #endif
|
---|
250 | }
|
---|
251 |
|
---|
252 | int wc_InitRsaKey_ex(RsaKey* key, void* heap, int devId)
|
---|
253 | {
|
---|
254 | int ret = 0;
|
---|
255 |
|
---|
256 | if (key == NULL) {
|
---|
257 | return BAD_FUNC_ARG;
|
---|
258 | }
|
---|
259 |
|
---|
260 | XMEMSET(key, 0, sizeof(RsaKey));
|
---|
261 |
|
---|
262 | key->type = RSA_TYPE_UNKNOWN;
|
---|
263 | key->state = RSA_STATE_NONE;
|
---|
264 | key->heap = heap;
|
---|
265 | #ifndef WOLFSSL_RSA_VERIFY_INLINE
|
---|
266 | key->dataIsAlloc = 0;
|
---|
267 | key->data = NULL;
|
---|
268 | #endif
|
---|
269 | key->dataLen = 0;
|
---|
270 | #ifdef WC_RSA_BLINDING
|
---|
271 | key->rng = NULL;
|
---|
272 | #endif
|
---|
273 |
|
---|
274 | #ifdef WOLF_CRYPTO_CB
|
---|
275 | key->devId = devId;
|
---|
276 | #else
|
---|
277 | (void)devId;
|
---|
278 | #endif
|
---|
279 |
|
---|
280 | #ifdef WOLFSSL_ASYNC_CRYPT
|
---|
281 | #ifdef WOLFSSL_CERT_GEN
|
---|
282 | XMEMSET(&key->certSignCtx, 0, sizeof(CertSignCtx));
|
---|
283 | #endif
|
---|
284 |
|
---|
285 | #ifdef WC_ASYNC_ENABLE_RSA
|
---|
286 | /* handle as async */
|
---|
287 | ret = wolfAsync_DevCtxInit(&key->asyncDev, WOLFSSL_ASYNC_MARKER_RSA,
|
---|
288 | key->heap, devId);
|
---|
289 | if (ret != 0)
|
---|
290 | return ret;
|
---|
291 | #endif /* WC_ASYNC_ENABLE_RSA */
|
---|
292 | #endif /* WOLFSSL_ASYNC_CRYPT */
|
---|
293 |
|
---|
294 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
295 | ret = mp_init_multi(&key->n, &key->e, NULL, NULL, NULL, NULL);
|
---|
296 | if (ret != MP_OKAY)
|
---|
297 | return ret;
|
---|
298 |
|
---|
299 | #if !defined(WOLFSSL_KEY_GEN) && !defined(OPENSSL_EXTRA) && defined(RSA_LOW_MEM)
|
---|
300 | ret = mp_init_multi(&key->d, &key->p, &key->q, NULL, NULL, NULL);
|
---|
301 | #else
|
---|
302 | ret = mp_init_multi(&key->d, &key->p, &key->q, &key->dP, &key->dQ, &key->u);
|
---|
303 | #endif
|
---|
304 | if (ret != MP_OKAY) {
|
---|
305 | mp_clear(&key->n);
|
---|
306 | mp_clear(&key->e);
|
---|
307 | return ret;
|
---|
308 | }
|
---|
309 | #else
|
---|
310 | ret = mp_init(&key->n);
|
---|
311 | if (ret != MP_OKAY)
|
---|
312 | return ret;
|
---|
313 | ret = mp_init(&key->e);
|
---|
314 | if (ret != MP_OKAY) {
|
---|
315 | mp_clear(&key->n);
|
---|
316 | return ret;
|
---|
317 | }
|
---|
318 | #endif
|
---|
319 |
|
---|
320 | #ifdef WOLFSSL_XILINX_CRYPT
|
---|
321 | key->pubExp = 0;
|
---|
322 | key->mod = NULL;
|
---|
323 | #endif
|
---|
324 |
|
---|
325 | #ifdef WOLFSSL_AFALG_XILINX_RSA
|
---|
326 | key->alFd = WC_SOCK_NOTSET;
|
---|
327 | key->rdFd = WC_SOCK_NOTSET;
|
---|
328 | #endif
|
---|
329 |
|
---|
330 | return ret;
|
---|
331 | }
|
---|
332 |
|
---|
333 | int wc_InitRsaKey(RsaKey* key, void* heap)
|
---|
334 | {
|
---|
335 | return wc_InitRsaKey_ex(key, heap, INVALID_DEVID);
|
---|
336 | }
|
---|
337 |
|
---|
338 | #ifdef HAVE_PKCS11
|
---|
339 | int wc_InitRsaKey_Id(RsaKey* key, unsigned char* id, int len, void* heap,
|
---|
340 | int devId)
|
---|
341 | {
|
---|
342 | int ret = 0;
|
---|
343 |
|
---|
344 | if (key == NULL)
|
---|
345 | ret = BAD_FUNC_ARG;
|
---|
346 | if (ret == 0 && (len < 0 || len > RSA_MAX_ID_LEN))
|
---|
347 | ret = BUFFER_E;
|
---|
348 |
|
---|
349 | if (ret == 0)
|
---|
350 | ret = wc_InitRsaKey_ex(key, heap, devId);
|
---|
351 |
|
---|
352 | if (ret == 0 && id != NULL && len != 0) {
|
---|
353 | XMEMCPY(key->id, id, len);
|
---|
354 | key->idLen = len;
|
---|
355 | }
|
---|
356 |
|
---|
357 | return ret;
|
---|
358 | }
|
---|
359 | #endif
|
---|
360 |
|
---|
361 |
|
---|
362 | #ifdef WOLFSSL_XILINX_CRYPT
|
---|
363 | #define MAX_E_SIZE 4
|
---|
364 | /* Used to setup hardware state
|
---|
365 | *
|
---|
366 | * key the RSA key to setup
|
---|
367 | *
|
---|
368 | * returns 0 on success
|
---|
369 | */
|
---|
370 | int wc_InitRsaHw(RsaKey* key)
|
---|
371 | {
|
---|
372 | unsigned char* m; /* RSA modulous */
|
---|
373 | word32 e = 0; /* RSA public exponent */
|
---|
374 | int mSz;
|
---|
375 | int eSz;
|
---|
376 |
|
---|
377 | if (key == NULL) {
|
---|
378 | return BAD_FUNC_ARG;
|
---|
379 | }
|
---|
380 |
|
---|
381 | mSz = mp_unsigned_bin_size(&(key->n));
|
---|
382 | m = (unsigned char*)XMALLOC(mSz, key->heap, DYNAMIC_TYPE_KEY);
|
---|
383 | if (m == 0) {
|
---|
384 | return MEMORY_E;
|
---|
385 | }
|
---|
386 |
|
---|
387 | if (mp_to_unsigned_bin(&(key->n), m) != MP_OKAY) {
|
---|
388 | WOLFSSL_MSG("Unable to get RSA key modulus");
|
---|
389 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
|
---|
390 | return MP_READ_E;
|
---|
391 | }
|
---|
392 |
|
---|
393 | eSz = mp_unsigned_bin_size(&(key->e));
|
---|
394 | if (eSz > MAX_E_SIZE) {
|
---|
395 | WOLFSSL_MSG("Exponent of size 4 bytes expected");
|
---|
396 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
|
---|
397 | return BAD_FUNC_ARG;
|
---|
398 | }
|
---|
399 |
|
---|
400 | if (mp_to_unsigned_bin(&(key->e), (byte*)&e + (MAX_E_SIZE - eSz))
|
---|
401 | != MP_OKAY) {
|
---|
402 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
|
---|
403 | WOLFSSL_MSG("Unable to get RSA key exponent");
|
---|
404 | return MP_READ_E;
|
---|
405 | }
|
---|
406 |
|
---|
407 | /* check for existing mod buffer to avoid memory leak */
|
---|
408 | if (key->mod != NULL) {
|
---|
409 | XFREE(key->mod, key->heap, DYNAMIC_TYPE_KEY);
|
---|
410 | }
|
---|
411 |
|
---|
412 | key->pubExp = e;
|
---|
413 | key->mod = m;
|
---|
414 |
|
---|
415 | if (XSecure_RsaInitialize(&(key->xRsa), key->mod, NULL,
|
---|
416 | (byte*)&(key->pubExp)) != XST_SUCCESS) {
|
---|
417 | WOLFSSL_MSG("Unable to initialize RSA on hardware");
|
---|
418 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
|
---|
419 | return BAD_STATE_E;
|
---|
420 | }
|
---|
421 |
|
---|
422 | #ifdef WOLFSSL_XILINX_PATCH
|
---|
423 | /* currently a patch of xsecure_rsa.c for 2048 bit keys */
|
---|
424 | if (wc_RsaEncryptSize(key) == 256) {
|
---|
425 | if (XSecure_RsaSetSize(&(key->xRsa), 2048) != XST_SUCCESS) {
|
---|
426 | WOLFSSL_MSG("Unable to set RSA key size on hardware");
|
---|
427 | XFREE(m, key->heap, DYNAMIC_TYPE_KEY);
|
---|
428 | return BAD_STATE_E;
|
---|
429 | }
|
---|
430 | }
|
---|
431 | #endif
|
---|
432 | return 0;
|
---|
433 | } /* WOLFSSL_XILINX_CRYPT*/
|
---|
434 |
|
---|
435 | #elif defined(WOLFSSL_CRYPTOCELL)
|
---|
436 |
|
---|
437 | int wc_InitRsaHw(RsaKey* key)
|
---|
438 | {
|
---|
439 | CRYSError_t ret = 0;
|
---|
440 | byte e[3];
|
---|
441 | word32 eSz = sizeof(e);
|
---|
442 | byte n[256];
|
---|
443 | word32 nSz = sizeof(n);
|
---|
444 | byte d[256];
|
---|
445 | word32 dSz = sizeof(d);
|
---|
446 | byte p[128];
|
---|
447 | word32 pSz = sizeof(p);
|
---|
448 | byte q[128];
|
---|
449 | word32 qSz = sizeof(q);
|
---|
450 |
|
---|
451 | if (key == NULL) {
|
---|
452 | return BAD_FUNC_ARG;
|
---|
453 | }
|
---|
454 |
|
---|
455 | ret = wc_RsaExportKey(key, e, &eSz, n, &nSz, d, &dSz, p, &pSz, q, &qSz);
|
---|
456 | if (ret != 0)
|
---|
457 | return MP_READ_E;
|
---|
458 |
|
---|
459 | ret = CRYS_RSA_Build_PubKey(&key->ctx.pubKey, e, eSz, n, nSz);
|
---|
460 | if (ret != SA_SILIB_RET_OK){
|
---|
461 | WOLFSSL_MSG("CRYS_RSA_Build_PubKey failed");
|
---|
462 | return ret;
|
---|
463 | }
|
---|
464 |
|
---|
465 | ret = CRYS_RSA_Build_PrivKey(&key->ctx.privKey, d, dSz, e, eSz, n, nSz);
|
---|
466 |
|
---|
467 | if (ret != SA_SILIB_RET_OK){
|
---|
468 | WOLFSSL_MSG("CRYS_RSA_Build_PrivKey failed");
|
---|
469 | return ret;
|
---|
470 | }
|
---|
471 | key->type = RSA_PRIVATE;
|
---|
472 | return 0;
|
---|
473 | }
|
---|
474 | static int cc310_RSA_GenerateKeyPair(RsaKey* key, int size, long e)
|
---|
475 | {
|
---|
476 | CRYSError_t ret = 0;
|
---|
477 | CRYS_RSAKGData_t KeyGenData;
|
---|
478 | CRYS_RSAKGFipsContext_t FipsCtx;
|
---|
479 | byte ex[3];
|
---|
480 | uint16_t eSz = sizeof(ex);
|
---|
481 | byte n[256];
|
---|
482 | uint16_t nSz = sizeof(n);
|
---|
483 |
|
---|
484 | ret = CRYS_RSA_KG_GenerateKeyPair(&wc_rndState,
|
---|
485 | wc_rndGenVectFunc,
|
---|
486 | (byte*)&e,
|
---|
487 | 3*sizeof(uint8_t),
|
---|
488 | size,
|
---|
489 | &key->ctx.privKey,
|
---|
490 | &key->ctx.pubKey,
|
---|
491 | &KeyGenData,
|
---|
492 | &FipsCtx);
|
---|
493 |
|
---|
494 | if (ret != SA_SILIB_RET_OK){
|
---|
495 | WOLFSSL_MSG("CRYS_RSA_KG_GenerateKeyPair failed");
|
---|
496 | return ret;
|
---|
497 | }
|
---|
498 |
|
---|
499 | ret = CRYS_RSA_Get_PubKey(&key->ctx.pubKey, ex, &eSz, n, &nSz);
|
---|
500 | if (ret != SA_SILIB_RET_OK){
|
---|
501 | WOLFSSL_MSG("CRYS_RSA_Get_PubKey failed");
|
---|
502 | return ret;
|
---|
503 | }
|
---|
504 | ret = wc_RsaPublicKeyDecodeRaw(n, nSz, ex, eSz, key);
|
---|
505 |
|
---|
506 | key->type = RSA_PRIVATE;
|
---|
507 |
|
---|
508 | return ret;
|
---|
509 | }
|
---|
510 | #endif /* WOLFSSL_CRYPTOCELL */
|
---|
511 |
|
---|
512 | int wc_FreeRsaKey(RsaKey* key)
|
---|
513 | {
|
---|
514 | int ret = 0;
|
---|
515 |
|
---|
516 | if (key == NULL) {
|
---|
517 | return BAD_FUNC_ARG;
|
---|
518 | }
|
---|
519 |
|
---|
520 | wc_RsaCleanup(key);
|
---|
521 |
|
---|
522 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA)
|
---|
523 | wolfAsync_DevCtxFree(&key->asyncDev, WOLFSSL_ASYNC_MARKER_RSA);
|
---|
524 | #endif
|
---|
525 |
|
---|
526 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
527 | if (key->type == RSA_PRIVATE) {
|
---|
528 | #if defined(WOLFSSL_KEY_GEN) || defined(OPENSSL_EXTRA) || !defined(RSA_LOW_MEM)
|
---|
529 | mp_forcezero(&key->u);
|
---|
530 | mp_forcezero(&key->dQ);
|
---|
531 | mp_forcezero(&key->dP);
|
---|
532 | #endif
|
---|
533 | mp_forcezero(&key->q);
|
---|
534 | mp_forcezero(&key->p);
|
---|
535 | mp_forcezero(&key->d);
|
---|
536 | }
|
---|
537 | /* private part */
|
---|
538 | #if defined(WOLFSSL_KEY_GEN) || defined(OPENSSL_EXTRA) || !defined(RSA_LOW_MEM)
|
---|
539 | mp_clear(&key->u);
|
---|
540 | mp_clear(&key->dQ);
|
---|
541 | mp_clear(&key->dP);
|
---|
542 | #endif
|
---|
543 | mp_clear(&key->q);
|
---|
544 | mp_clear(&key->p);
|
---|
545 | mp_clear(&key->d);
|
---|
546 | #endif /* WOLFSSL_RSA_PUBLIC_ONLY */
|
---|
547 |
|
---|
548 | /* public part */
|
---|
549 | mp_clear(&key->e);
|
---|
550 | mp_clear(&key->n);
|
---|
551 |
|
---|
552 | #ifdef WOLFSSL_XILINX_CRYPT
|
---|
553 | XFREE(key->mod, key->heap, DYNAMIC_TYPE_KEY);
|
---|
554 | key->mod = NULL;
|
---|
555 | #endif
|
---|
556 |
|
---|
557 | #ifdef WOLFSSL_AFALG_XILINX_RSA
|
---|
558 | /* make sure that sockets are closed on cleanup */
|
---|
559 | if (key->alFd > 0) {
|
---|
560 | close(key->alFd);
|
---|
561 | key->alFd = WC_SOCK_NOTSET;
|
---|
562 | }
|
---|
563 | if (key->rdFd > 0) {
|
---|
564 | close(key->rdFd);
|
---|
565 | key->rdFd = WC_SOCK_NOTSET;
|
---|
566 | }
|
---|
567 | #endif
|
---|
568 |
|
---|
569 | return ret;
|
---|
570 | }
|
---|
571 |
|
---|
572 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
573 | #if defined(WOLFSSL_KEY_GEN) && !defined(WOLFSSL_NO_RSA_KEY_CHECK)
|
---|
574 | /* Check the pair-wise consistency of the RSA key.
|
---|
575 | * From NIST SP 800-56B, section 6.4.1.1.
|
---|
576 | * Verify that k = (k^e)^d, for some k: 1 < k < n-1. */
|
---|
577 | int wc_CheckRsaKey(RsaKey* key)
|
---|
578 | {
|
---|
579 | #if defined(WOLFSSL_CRYPTOCELL)
|
---|
580 | return 0;
|
---|
581 | #endif
|
---|
582 | #ifdef WOLFSSL_SMALL_STACK
|
---|
583 | mp_int *k = NULL, *tmp = NULL;
|
---|
584 | #else
|
---|
585 | mp_int k[1], tmp[1];
|
---|
586 | #endif
|
---|
587 | int ret = 0;
|
---|
588 |
|
---|
589 | #ifdef WOLFSSL_SMALL_STACK
|
---|
590 | k = (mp_int*)XMALLOC(sizeof(mp_int) * 2, NULL, DYNAMIC_TYPE_RSA);
|
---|
591 | if (k == NULL)
|
---|
592 | return MEMORY_E;
|
---|
593 | tmp = k + 1;
|
---|
594 | #endif
|
---|
595 |
|
---|
596 | if (mp_init_multi(k, tmp, NULL, NULL, NULL, NULL) != MP_OKAY)
|
---|
597 | ret = MP_INIT_E;
|
---|
598 |
|
---|
599 | if (ret == 0) {
|
---|
600 | if (key == NULL)
|
---|
601 | ret = BAD_FUNC_ARG;
|
---|
602 | }
|
---|
603 |
|
---|
604 | if (ret == 0) {
|
---|
605 | if (mp_set_int(k, 0x2342) != MP_OKAY)
|
---|
606 | ret = MP_READ_E;
|
---|
607 | }
|
---|
608 |
|
---|
609 | #ifdef WOLFSSL_HAVE_SP_RSA
|
---|
610 | #ifndef WOLFSSL_SP_NO_2048
|
---|
611 | if (mp_count_bits(&key->n) == 2048) {
|
---|
612 | ret = sp_ModExp_2048(k, &key->e, &key->n, tmp);
|
---|
613 | if (ret != 0)
|
---|
614 | ret = MP_EXPTMOD_E;
|
---|
615 | ret = sp_ModExp_2048(tmp, &key->d, &key->n, tmp);
|
---|
616 | if (ret != 0)
|
---|
617 | ret = MP_EXPTMOD_E;
|
---|
618 | }
|
---|
619 | else
|
---|
620 | #endif
|
---|
621 | #ifndef WOLFSSL_SP_NO_3072
|
---|
622 | if (mp_count_bits(&key->n) == 3072) {
|
---|
623 | ret = sp_ModExp_3072(k, &key->e, &key->n, tmp);
|
---|
624 | if (ret != 0)
|
---|
625 | ret = MP_EXPTMOD_E;
|
---|
626 | ret = sp_ModExp_3072(tmp, &key->d, &key->n, tmp);
|
---|
627 | if (ret != 0)
|
---|
628 | ret = MP_EXPTMOD_E;
|
---|
629 | }
|
---|
630 | else
|
---|
631 | #endif
|
---|
632 | #ifdef WOLFSSL_SP_4096
|
---|
633 | if (mp_count_bits(&key->n) == 4096) {
|
---|
634 | ret = sp_ModExp_4096(k, &key->e, &key->n, tmp);
|
---|
635 | if (ret != 0)
|
---|
636 | ret = MP_EXPTMOD_E;
|
---|
637 | ret = sp_ModExp_4096(tmp, &key->d, &key->n, tmp);
|
---|
638 | if (ret != 0)
|
---|
639 | ret = MP_EXPTMOD_E;
|
---|
640 | }
|
---|
641 | else
|
---|
642 | #endif
|
---|
643 | #endif
|
---|
644 | #ifdef WOLFSSL_SP_MATH
|
---|
645 | {
|
---|
646 | ret = WC_KEY_SIZE_E;
|
---|
647 | }
|
---|
648 | #else
|
---|
649 | {
|
---|
650 | if (ret == 0) {
|
---|
651 | if (mp_exptmod(k, &key->e, &key->n, tmp) != MP_OKAY)
|
---|
652 | ret = MP_EXPTMOD_E;
|
---|
653 | }
|
---|
654 |
|
---|
655 | if (ret == 0) {
|
---|
656 | if (mp_exptmod(tmp, &key->d, &key->n, tmp) != MP_OKAY)
|
---|
657 | ret = MP_EXPTMOD_E;
|
---|
658 | }
|
---|
659 | }
|
---|
660 | #endif
|
---|
661 |
|
---|
662 | if (ret == 0) {
|
---|
663 | if (mp_cmp(k, tmp) != MP_EQ)
|
---|
664 | ret = RSA_KEY_PAIR_E;
|
---|
665 | }
|
---|
666 |
|
---|
667 | /* Check d is less than n. */
|
---|
668 | if (ret == 0 ) {
|
---|
669 | if (mp_cmp(&key->d, &key->n) != MP_LT) {
|
---|
670 | ret = MP_EXPTMOD_E;
|
---|
671 | }
|
---|
672 | }
|
---|
673 | /* Check p*q = n. */
|
---|
674 | if (ret == 0 ) {
|
---|
675 | if (mp_mul(&key->p, &key->q, tmp) != MP_OKAY) {
|
---|
676 | ret = MP_EXPTMOD_E;
|
---|
677 | }
|
---|
678 | }
|
---|
679 | if (ret == 0 ) {
|
---|
680 | if (mp_cmp(&key->n, tmp) != MP_EQ) {
|
---|
681 | ret = MP_EXPTMOD_E;
|
---|
682 | }
|
---|
683 | }
|
---|
684 |
|
---|
685 | /* Check dP, dQ and u if they exist */
|
---|
686 | if (ret == 0 && !mp_iszero(&key->dP)) {
|
---|
687 | if (mp_sub_d(&key->p, 1, tmp) != MP_OKAY) {
|
---|
688 | ret = MP_EXPTMOD_E;
|
---|
689 | }
|
---|
690 | /* Check dP <= p-1. */
|
---|
691 | if (ret == 0) {
|
---|
692 | if (mp_cmp(&key->dP, tmp) != MP_LT) {
|
---|
693 | ret = MP_EXPTMOD_E;
|
---|
694 | }
|
---|
695 | }
|
---|
696 | /* Check e*dP mod p-1 = 1. (dP = 1/e mod p-1) */
|
---|
697 | if (ret == 0) {
|
---|
698 | if (mp_mulmod(&key->dP, &key->e, tmp, tmp) != MP_OKAY) {
|
---|
699 | ret = MP_EXPTMOD_E;
|
---|
700 | }
|
---|
701 | }
|
---|
702 | if (ret == 0 ) {
|
---|
703 | if (!mp_isone(tmp)) {
|
---|
704 | ret = MP_EXPTMOD_E;
|
---|
705 | }
|
---|
706 | }
|
---|
707 |
|
---|
708 | if (ret == 0) {
|
---|
709 | if (mp_sub_d(&key->q, 1, tmp) != MP_OKAY) {
|
---|
710 | ret = MP_EXPTMOD_E;
|
---|
711 | }
|
---|
712 | }
|
---|
713 | /* Check dQ <= q-1. */
|
---|
714 | if (ret == 0) {
|
---|
715 | if (mp_cmp(&key->dQ, tmp) != MP_LT) {
|
---|
716 | ret = MP_EXPTMOD_E;
|
---|
717 | }
|
---|
718 | }
|
---|
719 | /* Check e*dP mod p-1 = 1. (dQ = 1/e mod q-1) */
|
---|
720 | if (ret == 0) {
|
---|
721 | if (mp_mulmod(&key->dQ, &key->e, tmp, tmp) != MP_OKAY) {
|
---|
722 | ret = MP_EXPTMOD_E;
|
---|
723 | }
|
---|
724 | }
|
---|
725 | if (ret == 0 ) {
|
---|
726 | if (!mp_isone(tmp)) {
|
---|
727 | ret = MP_EXPTMOD_E;
|
---|
728 | }
|
---|
729 | }
|
---|
730 |
|
---|
731 | /* Check u <= p. */
|
---|
732 | if (ret == 0) {
|
---|
733 | if (mp_cmp(&key->u, &key->p) != MP_LT) {
|
---|
734 | ret = MP_EXPTMOD_E;
|
---|
735 | }
|
---|
736 | }
|
---|
737 | /* Check u*q mod p = 1. (u = 1/q mod p) */
|
---|
738 | if (ret == 0) {
|
---|
739 | if (mp_mulmod(&key->u, &key->q, &key->p, tmp) != MP_OKAY) {
|
---|
740 | ret = MP_EXPTMOD_E;
|
---|
741 | }
|
---|
742 | }
|
---|
743 | if (ret == 0 ) {
|
---|
744 | if (!mp_isone(tmp)) {
|
---|
745 | ret = MP_EXPTMOD_E;
|
---|
746 | }
|
---|
747 | }
|
---|
748 | }
|
---|
749 |
|
---|
750 | mp_forcezero(tmp);
|
---|
751 | mp_clear(tmp);
|
---|
752 | mp_clear(k);
|
---|
753 | #ifdef WOLFSSL_SMALL_STACK
|
---|
754 | XFREE(k, NULL, DYNAMIC_TYPE_RSA);
|
---|
755 | #endif
|
---|
756 |
|
---|
757 | return ret;
|
---|
758 | }
|
---|
759 | #endif
|
---|
760 | #endif
|
---|
761 |
|
---|
762 |
|
---|
763 | #if !defined(WC_NO_RSA_OAEP) || defined(WC_RSA_PSS)
|
---|
764 | /* Uses MGF1 standard as a mask generation function
|
---|
765 | hType: hash type used
|
---|
766 | seed: seed to use for generating mask
|
---|
767 | seedSz: size of seed buffer
|
---|
768 | out: mask output after generation
|
---|
769 | outSz: size of output buffer
|
---|
770 | */
|
---|
771 | #if !defined(NO_SHA) || !defined(NO_SHA256) || defined(WOLFSSL_SHA384) || defined(WOLFSSL_SHA512)
|
---|
772 | static int RsaMGF1(enum wc_HashType hType, byte* seed, word32 seedSz,
|
---|
773 | byte* out, word32 outSz, void* heap)
|
---|
774 | {
|
---|
775 | byte* tmp;
|
---|
776 | /* needs to be large enough for seed size plus counter(4) */
|
---|
777 | byte tmpA[WC_MAX_DIGEST_SIZE + 4];
|
---|
778 | byte tmpF; /* 1 if dynamic memory needs freed */
|
---|
779 | word32 tmpSz;
|
---|
780 | int hLen;
|
---|
781 | int ret;
|
---|
782 | word32 counter;
|
---|
783 | word32 idx;
|
---|
784 | hLen = wc_HashGetDigestSize(hType);
|
---|
785 | counter = 0;
|
---|
786 | idx = 0;
|
---|
787 |
|
---|
788 | (void)heap;
|
---|
789 |
|
---|
790 | /* check error return of wc_HashGetDigestSize */
|
---|
791 | if (hLen < 0) {
|
---|
792 | return hLen;
|
---|
793 | }
|
---|
794 |
|
---|
795 | /* if tmp is not large enough than use some dynamic memory */
|
---|
796 | if ((seedSz + 4) > sizeof(tmpA) || (word32)hLen > sizeof(tmpA)) {
|
---|
797 | /* find largest amount of memory needed which will be the max of
|
---|
798 | * hLen and (seedSz + 4) since tmp is used to store the hash digest */
|
---|
799 | tmpSz = ((seedSz + 4) > (word32)hLen)? seedSz + 4: (word32)hLen;
|
---|
800 | tmp = (byte*)XMALLOC(tmpSz, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
801 | if (tmp == NULL) {
|
---|
802 | return MEMORY_E;
|
---|
803 | }
|
---|
804 | tmpF = 1; /* make sure to free memory when done */
|
---|
805 | }
|
---|
806 | else {
|
---|
807 | /* use array on the stack */
|
---|
808 | tmpSz = sizeof(tmpA);
|
---|
809 | tmp = tmpA;
|
---|
810 | tmpF = 0; /* no need to free memory at end */
|
---|
811 | }
|
---|
812 |
|
---|
813 | do {
|
---|
814 | int i = 0;
|
---|
815 | XMEMCPY(tmp, seed, seedSz);
|
---|
816 |
|
---|
817 | /* counter to byte array appended to tmp */
|
---|
818 | tmp[seedSz] = (counter >> 24) & 0xFF;
|
---|
819 | tmp[seedSz + 1] = (counter >> 16) & 0xFF;
|
---|
820 | tmp[seedSz + 2] = (counter >> 8) & 0xFF;
|
---|
821 | tmp[seedSz + 3] = (counter) & 0xFF;
|
---|
822 |
|
---|
823 | /* hash and append to existing output */
|
---|
824 | if ((ret = wc_Hash(hType, tmp, (seedSz + 4), tmp, tmpSz)) != 0) {
|
---|
825 | /* check for if dynamic memory was needed, then free */
|
---|
826 | if (tmpF) {
|
---|
827 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
828 | }
|
---|
829 | return ret;
|
---|
830 | }
|
---|
831 |
|
---|
832 | for (i = 0; i < hLen && idx < outSz; i++) {
|
---|
833 | out[idx++] = tmp[i];
|
---|
834 | }
|
---|
835 | counter++;
|
---|
836 | } while (idx < outSz);
|
---|
837 |
|
---|
838 | /* check for if dynamic memory was needed, then free */
|
---|
839 | if (tmpF) {
|
---|
840 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
841 | }
|
---|
842 |
|
---|
843 | return 0;
|
---|
844 | }
|
---|
845 | #endif /* SHA2 Hashes */
|
---|
846 |
|
---|
847 | /* helper function to direct which mask generation function is used
|
---|
848 | switched on type input
|
---|
849 | */
|
---|
850 | static int RsaMGF(int type, byte* seed, word32 seedSz, byte* out,
|
---|
851 | word32 outSz, void* heap)
|
---|
852 | {
|
---|
853 | int ret;
|
---|
854 |
|
---|
855 | switch(type) {
|
---|
856 | #ifndef NO_SHA
|
---|
857 | case WC_MGF1SHA1:
|
---|
858 | ret = RsaMGF1(WC_HASH_TYPE_SHA, seed, seedSz, out, outSz, heap);
|
---|
859 | break;
|
---|
860 | #endif
|
---|
861 | #ifndef NO_SHA256
|
---|
862 | #ifdef WOLFSSL_SHA224
|
---|
863 | case WC_MGF1SHA224:
|
---|
864 | ret = RsaMGF1(WC_HASH_TYPE_SHA224, seed, seedSz, out, outSz, heap);
|
---|
865 | break;
|
---|
866 | #endif
|
---|
867 | case WC_MGF1SHA256:
|
---|
868 | ret = RsaMGF1(WC_HASH_TYPE_SHA256, seed, seedSz, out, outSz, heap);
|
---|
869 | break;
|
---|
870 | #endif
|
---|
871 | #ifdef WOLFSSL_SHA384
|
---|
872 | case WC_MGF1SHA384:
|
---|
873 | ret = RsaMGF1(WC_HASH_TYPE_SHA384, seed, seedSz, out, outSz, heap);
|
---|
874 | break;
|
---|
875 | #endif
|
---|
876 | #ifdef WOLFSSL_SHA512
|
---|
877 | case WC_MGF1SHA512:
|
---|
878 | ret = RsaMGF1(WC_HASH_TYPE_SHA512, seed, seedSz, out, outSz, heap);
|
---|
879 | break;
|
---|
880 | #endif
|
---|
881 | default:
|
---|
882 | WOLFSSL_MSG("Unknown MGF type: check build options");
|
---|
883 | ret = BAD_FUNC_ARG;
|
---|
884 | }
|
---|
885 |
|
---|
886 | /* in case of default avoid unused warning */
|
---|
887 | (void)seed;
|
---|
888 | (void)seedSz;
|
---|
889 | (void)out;
|
---|
890 | (void)outSz;
|
---|
891 | (void)heap;
|
---|
892 |
|
---|
893 | return ret;
|
---|
894 | }
|
---|
895 | #endif /* !WC_NO_RSA_OAEP || WC_RSA_PSS */
|
---|
896 |
|
---|
897 |
|
---|
898 | /* Padding */
|
---|
899 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
900 | #ifndef WC_NO_RNG
|
---|
901 | #ifndef WC_NO_RSA_OAEP
|
---|
902 | static int RsaPad_OAEP(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
903 | word32 pkcsBlockLen, byte padValue, WC_RNG* rng,
|
---|
904 | enum wc_HashType hType, int mgf, byte* optLabel, word32 labelLen,
|
---|
905 | void* heap)
|
---|
906 | {
|
---|
907 | int ret;
|
---|
908 | int hLen;
|
---|
909 | int psLen;
|
---|
910 | int i;
|
---|
911 | word32 idx;
|
---|
912 |
|
---|
913 | byte* dbMask;
|
---|
914 |
|
---|
915 | #ifdef WOLFSSL_SMALL_STACK
|
---|
916 | byte* lHash = NULL;
|
---|
917 | byte* seed = NULL;
|
---|
918 | #else
|
---|
919 | /* must be large enough to contain largest hash */
|
---|
920 | byte lHash[WC_MAX_DIGEST_SIZE];
|
---|
921 | byte seed[ WC_MAX_DIGEST_SIZE];
|
---|
922 | #endif
|
---|
923 |
|
---|
924 | /* no label is allowed, but catch if no label provided and length > 0 */
|
---|
925 | if (optLabel == NULL && labelLen > 0) {
|
---|
926 | return BUFFER_E;
|
---|
927 | }
|
---|
928 |
|
---|
929 | /* limit of label is the same as limit of hash function which is massive */
|
---|
930 | hLen = wc_HashGetDigestSize(hType);
|
---|
931 | if (hLen < 0) {
|
---|
932 | return hLen;
|
---|
933 | }
|
---|
934 |
|
---|
935 | #ifdef WOLFSSL_SMALL_STACK
|
---|
936 | lHash = (byte*)XMALLOC(hLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
937 | if (lHash == NULL) {
|
---|
938 | return MEMORY_E;
|
---|
939 | }
|
---|
940 | seed = (byte*)XMALLOC(hLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
941 | if (seed == NULL) {
|
---|
942 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
943 | return MEMORY_E;
|
---|
944 | }
|
---|
945 | #else
|
---|
946 | /* hLen should never be larger than lHash since size is max digest size,
|
---|
947 | but check before blindly calling wc_Hash */
|
---|
948 | if ((word32)hLen > sizeof(lHash)) {
|
---|
949 | WOLFSSL_MSG("OAEP lHash to small for digest!!");
|
---|
950 | return MEMORY_E;
|
---|
951 | }
|
---|
952 | #endif
|
---|
953 |
|
---|
954 | if ((ret = wc_Hash(hType, optLabel, labelLen, lHash, hLen)) != 0) {
|
---|
955 | WOLFSSL_MSG("OAEP hash type possibly not supported or lHash to small");
|
---|
956 | #ifdef WOLFSSL_SMALL_STACK
|
---|
957 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
958 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
959 | #endif
|
---|
960 | return ret;
|
---|
961 | }
|
---|
962 |
|
---|
963 | /* handles check of location for idx as well as psLen, cast to int to check
|
---|
964 | for pkcsBlockLen(k) - 2 * hLen - 2 being negative
|
---|
965 | This check is similar to decryption where k > 2 * hLen + 2 as msg
|
---|
966 | size approaches 0. In decryption if k is less than or equal -- then there
|
---|
967 | is no possible room for msg.
|
---|
968 | k = RSA key size
|
---|
969 | hLen = hash digest size -- will always be >= 0 at this point
|
---|
970 | */
|
---|
971 | if ((word32)(2 * hLen + 2) > pkcsBlockLen) {
|
---|
972 | WOLFSSL_MSG("OAEP pad error hash to big for RSA key size");
|
---|
973 | #ifdef WOLFSSL_SMALL_STACK
|
---|
974 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
975 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
976 | #endif
|
---|
977 | return BAD_FUNC_ARG;
|
---|
978 | }
|
---|
979 |
|
---|
980 | if (inputLen > (pkcsBlockLen - 2 * hLen - 2)) {
|
---|
981 | WOLFSSL_MSG("OAEP pad error message too long");
|
---|
982 | #ifdef WOLFSSL_SMALL_STACK
|
---|
983 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
984 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
985 | #endif
|
---|
986 | return BAD_FUNC_ARG;
|
---|
987 | }
|
---|
988 |
|
---|
989 | /* concatenate lHash || PS || 0x01 || msg */
|
---|
990 | idx = pkcsBlockLen - 1 - inputLen;
|
---|
991 | psLen = pkcsBlockLen - inputLen - 2 * hLen - 2;
|
---|
992 | if (pkcsBlockLen < inputLen) { /*make sure not writing over end of buffer */
|
---|
993 | #ifdef WOLFSSL_SMALL_STACK
|
---|
994 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
995 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
996 | #endif
|
---|
997 | return BUFFER_E;
|
---|
998 | }
|
---|
999 | XMEMCPY(pkcsBlock + (pkcsBlockLen - inputLen), input, inputLen);
|
---|
1000 | pkcsBlock[idx--] = 0x01; /* PS and M separator */
|
---|
1001 | while (psLen > 0 && idx > 0) {
|
---|
1002 | pkcsBlock[idx--] = 0x00;
|
---|
1003 | psLen--;
|
---|
1004 | }
|
---|
1005 |
|
---|
1006 | idx = idx - hLen + 1;
|
---|
1007 | XMEMCPY(pkcsBlock + idx, lHash, hLen);
|
---|
1008 |
|
---|
1009 | /* generate random seed */
|
---|
1010 | if ((ret = wc_RNG_GenerateBlock(rng, seed, hLen)) != 0) {
|
---|
1011 | #ifdef WOLFSSL_SMALL_STACK
|
---|
1012 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1013 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1014 | #endif
|
---|
1015 | return ret;
|
---|
1016 | }
|
---|
1017 |
|
---|
1018 | /* create maskedDB from dbMask */
|
---|
1019 | dbMask = (byte*)XMALLOC(pkcsBlockLen - hLen - 1, heap, DYNAMIC_TYPE_RSA);
|
---|
1020 | if (dbMask == NULL) {
|
---|
1021 | #ifdef WOLFSSL_SMALL_STACK
|
---|
1022 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1023 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1024 | #endif
|
---|
1025 | return MEMORY_E;
|
---|
1026 | }
|
---|
1027 | XMEMSET(dbMask, 0, pkcsBlockLen - hLen - 1); /* help static analyzer */
|
---|
1028 |
|
---|
1029 | ret = RsaMGF(mgf, seed, hLen, dbMask, pkcsBlockLen - hLen - 1, heap);
|
---|
1030 | if (ret != 0) {
|
---|
1031 | XFREE(dbMask, heap, DYNAMIC_TYPE_RSA);
|
---|
1032 | #ifdef WOLFSSL_SMALL_STACK
|
---|
1033 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1034 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1035 | #endif
|
---|
1036 | return ret;
|
---|
1037 | }
|
---|
1038 |
|
---|
1039 | i = 0;
|
---|
1040 | idx = hLen + 1;
|
---|
1041 | while (idx < pkcsBlockLen && (word32)i < (pkcsBlockLen - hLen -1)) {
|
---|
1042 | pkcsBlock[idx] = dbMask[i++] ^ pkcsBlock[idx];
|
---|
1043 | idx++;
|
---|
1044 | }
|
---|
1045 | XFREE(dbMask, heap, DYNAMIC_TYPE_RSA);
|
---|
1046 |
|
---|
1047 |
|
---|
1048 | /* create maskedSeed from seedMask */
|
---|
1049 | idx = 0;
|
---|
1050 | pkcsBlock[idx++] = 0x00;
|
---|
1051 | /* create seedMask inline */
|
---|
1052 | if ((ret = RsaMGF(mgf, pkcsBlock + hLen + 1, pkcsBlockLen - hLen - 1,
|
---|
1053 | pkcsBlock + 1, hLen, heap)) != 0) {
|
---|
1054 | #ifdef WOLFSSL_SMALL_STACK
|
---|
1055 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1056 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1057 | #endif
|
---|
1058 | return ret;
|
---|
1059 | }
|
---|
1060 |
|
---|
1061 | /* xor created seedMask with seed to make maskedSeed */
|
---|
1062 | i = 0;
|
---|
1063 | while (idx < (word32)(hLen + 1) && i < hLen) {
|
---|
1064 | pkcsBlock[idx] = pkcsBlock[idx] ^ seed[i++];
|
---|
1065 | idx++;
|
---|
1066 | }
|
---|
1067 |
|
---|
1068 | #ifdef WOLFSSL_SMALL_STACK
|
---|
1069 | XFREE(lHash, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1070 | XFREE(seed, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1071 | #endif
|
---|
1072 | (void)padValue;
|
---|
1073 |
|
---|
1074 | return 0;
|
---|
1075 | }
|
---|
1076 | #endif /* !WC_NO_RSA_OAEP */
|
---|
1077 |
|
---|
1078 | #ifdef WC_RSA_PSS
|
---|
1079 |
|
---|
1080 | /* 0x00 .. 0x00 0x01 | Salt | Gen Hash | 0xbc
|
---|
1081 | * XOR MGF over all bytes down to end of Salt
|
---|
1082 | * Gen Hash = HASH(8 * 0x00 | Message Hash | Salt)
|
---|
1083 | *
|
---|
1084 | * input Digest of the message.
|
---|
1085 | * inputLen Length of digest.
|
---|
1086 | * pkcsBlock Buffer to write to.
|
---|
1087 | * pkcsBlockLen Length of buffer to write to.
|
---|
1088 | * rng Random number generator (for salt).
|
---|
1089 | * htype Hash function to use.
|
---|
1090 | * mgf Mask generation function.
|
---|
1091 | * saltLen Length of salt to put in padding.
|
---|
1092 | * bits Length of key in bits.
|
---|
1093 | * heap Used for dynamic memory allocation.
|
---|
1094 | * returns 0 on success, PSS_SALTLEN_E when the salt length is invalid
|
---|
1095 | * and other negative values on error.
|
---|
1096 | */
|
---|
1097 | static int RsaPad_PSS(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
1098 | word32 pkcsBlockLen, WC_RNG* rng, enum wc_HashType hType, int mgf,
|
---|
1099 | int saltLen, int bits, void* heap)
|
---|
1100 | {
|
---|
1101 | int ret = 0;
|
---|
1102 | int hLen, i, o, maskLen, hiBits;
|
---|
1103 | byte* m;
|
---|
1104 | byte* s;
|
---|
1105 | #if defined(WOLFSSL_PSS_LONG_SALT) || defined(WOLFSSL_PSS_SALT_LEN_DISCOVER)
|
---|
1106 | #if defined(WOLFSSL_NO_MALLOC) && !defined(WOLFSSL_STATIC_MEMORY)
|
---|
1107 | byte salt[RSA_MAX_SIZE/8 + RSA_PSS_PAD_SZ];
|
---|
1108 | #else
|
---|
1109 | byte* salt = NULL;
|
---|
1110 | #endif
|
---|
1111 | #else
|
---|
1112 | byte salt[WC_MAX_DIGEST_SIZE];
|
---|
1113 | #endif
|
---|
1114 |
|
---|
1115 | #if defined(WOLFSSL_PSS_LONG_SALT) || defined(WOLFSSL_PSS_SALT_LEN_DISCOVER)
|
---|
1116 | if (pkcsBlockLen > RSA_MAX_SIZE/8) {
|
---|
1117 | return MEMORY_E;
|
---|
1118 | }
|
---|
1119 | #endif
|
---|
1120 |
|
---|
1121 | hLen = wc_HashGetDigestSize(hType);
|
---|
1122 | if (hLen < 0)
|
---|
1123 | return hLen;
|
---|
1124 |
|
---|
1125 | hiBits = (bits - 1) & 0x7;
|
---|
1126 | if (hiBits == 0) {
|
---|
1127 | *(pkcsBlock++) = 0;
|
---|
1128 | pkcsBlockLen--;
|
---|
1129 | }
|
---|
1130 |
|
---|
1131 | if (saltLen == RSA_PSS_SALT_LEN_DEFAULT) {
|
---|
1132 | saltLen = hLen;
|
---|
1133 | #ifdef WOLFSSL_SHA512
|
---|
1134 | /* See FIPS 186-4 section 5.5 item (e). */
|
---|
1135 | if (bits == 1024 && hLen == WC_SHA512_DIGEST_SIZE) {
|
---|
1136 | saltLen = RSA_PSS_SALT_MAX_SZ;
|
---|
1137 | }
|
---|
1138 | #endif
|
---|
1139 | }
|
---|
1140 | #ifndef WOLFSSL_PSS_LONG_SALT
|
---|
1141 | else if (saltLen > hLen) {
|
---|
1142 | return PSS_SALTLEN_E;
|
---|
1143 | }
|
---|
1144 | #endif
|
---|
1145 | #ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
1146 | else if (saltLen < RSA_PSS_SALT_LEN_DEFAULT) {
|
---|
1147 | return PSS_SALTLEN_E;
|
---|
1148 | }
|
---|
1149 | #else
|
---|
1150 | else if (saltLen == RSA_PSS_SALT_LEN_DISCOVER) {
|
---|
1151 | saltLen = (int)pkcsBlockLen - hLen - 2;
|
---|
1152 | if (saltLen < 0) {
|
---|
1153 | return PSS_SALTLEN_E;
|
---|
1154 | }
|
---|
1155 | }
|
---|
1156 | else if (saltLen < RSA_PSS_SALT_LEN_DISCOVER) {
|
---|
1157 | return PSS_SALTLEN_E;
|
---|
1158 | }
|
---|
1159 | #endif
|
---|
1160 | if ((int)pkcsBlockLen - hLen < saltLen + 2) {
|
---|
1161 | return PSS_SALTLEN_E;
|
---|
1162 | }
|
---|
1163 |
|
---|
1164 | maskLen = pkcsBlockLen - 1 - hLen;
|
---|
1165 |
|
---|
1166 | #if defined(WOLFSSL_PSS_LONG_SALT) || defined(WOLFSSL_PSS_SALT_LEN_DISCOVER)
|
---|
1167 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
1168 | salt = (byte*)XMALLOC(RSA_PSS_PAD_SZ + inputLen + saltLen, heap,
|
---|
1169 | DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1170 | if (salt == NULL) {
|
---|
1171 | return MEMORY_E;
|
---|
1172 | }
|
---|
1173 | #endif
|
---|
1174 | s = m = salt;
|
---|
1175 | XMEMSET(m, 0, RSA_PSS_PAD_SZ);
|
---|
1176 | m += RSA_PSS_PAD_SZ;
|
---|
1177 | XMEMCPY(m, input, inputLen);
|
---|
1178 | m += inputLen;
|
---|
1179 | o = (int)(m - s);
|
---|
1180 | if (saltLen > 0) {
|
---|
1181 | ret = wc_RNG_GenerateBlock(rng, m, saltLen);
|
---|
1182 | if (ret == 0) {
|
---|
1183 | m += saltLen;
|
---|
1184 | }
|
---|
1185 | }
|
---|
1186 | #else
|
---|
1187 | s = m = pkcsBlock;
|
---|
1188 | XMEMSET(m, 0, RSA_PSS_PAD_SZ);
|
---|
1189 | m += RSA_PSS_PAD_SZ;
|
---|
1190 | XMEMCPY(m, input, inputLen);
|
---|
1191 | m += inputLen;
|
---|
1192 | o = 0;
|
---|
1193 | if (saltLen > 0) {
|
---|
1194 | ret = wc_RNG_GenerateBlock(rng, salt, saltLen);
|
---|
1195 | if (ret == 0) {
|
---|
1196 | XMEMCPY(m, salt, saltLen);
|
---|
1197 | m += saltLen;
|
---|
1198 | }
|
---|
1199 | }
|
---|
1200 | #endif
|
---|
1201 | if (ret == 0) {
|
---|
1202 | /* Put Hash at end of pkcsBlock - 1 */
|
---|
1203 | ret = wc_Hash(hType, s, (word32)(m - s), pkcsBlock + maskLen, hLen);
|
---|
1204 | }
|
---|
1205 | if (ret == 0) {
|
---|
1206 | pkcsBlock[pkcsBlockLen - 1] = RSA_PSS_PAD_TERM;
|
---|
1207 |
|
---|
1208 | ret = RsaMGF(mgf, pkcsBlock + maskLen, hLen, pkcsBlock, maskLen, heap);
|
---|
1209 | }
|
---|
1210 | if (ret == 0) {
|
---|
1211 | pkcsBlock[0] &= (1 << hiBits) - 1;
|
---|
1212 |
|
---|
1213 | m = pkcsBlock + maskLen - saltLen - 1;
|
---|
1214 | *(m++) ^= 0x01;
|
---|
1215 | for (i = 0; i < saltLen; i++) {
|
---|
1216 | m[i] ^= salt[o + i];
|
---|
1217 | }
|
---|
1218 | }
|
---|
1219 |
|
---|
1220 | #if defined(WOLFSSL_PSS_LONG_SALT) || defined(WOLFSSL_PSS_SALT_LEN_DISCOVER)
|
---|
1221 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
1222 | if (salt != NULL) {
|
---|
1223 | XFREE(salt, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1224 | }
|
---|
1225 | #endif
|
---|
1226 | #endif
|
---|
1227 | return ret;
|
---|
1228 | }
|
---|
1229 | #endif /* WC_RSA_PSS */
|
---|
1230 | #endif /* !WC_NO_RNG */
|
---|
1231 |
|
---|
1232 | static int RsaPad(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
1233 | word32 pkcsBlockLen, byte padValue, WC_RNG* rng)
|
---|
1234 | {
|
---|
1235 | if (input == NULL || inputLen == 0 || pkcsBlock == NULL ||
|
---|
1236 | pkcsBlockLen == 0) {
|
---|
1237 | return BAD_FUNC_ARG;
|
---|
1238 | }
|
---|
1239 |
|
---|
1240 | pkcsBlock[0] = 0x0; /* set first byte to zero and advance */
|
---|
1241 | pkcsBlock++; pkcsBlockLen--;
|
---|
1242 | pkcsBlock[0] = padValue; /* insert padValue */
|
---|
1243 |
|
---|
1244 | if (padValue == RSA_BLOCK_TYPE_1) {
|
---|
1245 | if (pkcsBlockLen < inputLen + 2) {
|
---|
1246 | WOLFSSL_MSG("RsaPad error, invalid length");
|
---|
1247 | return RSA_PAD_E;
|
---|
1248 | }
|
---|
1249 |
|
---|
1250 | /* pad with 0xff bytes */
|
---|
1251 | XMEMSET(&pkcsBlock[1], 0xFF, pkcsBlockLen - inputLen - 2);
|
---|
1252 | }
|
---|
1253 | else {
|
---|
1254 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WC_NO_RNG)
|
---|
1255 | /* pad with non-zero random bytes */
|
---|
1256 | word32 padLen, i;
|
---|
1257 | int ret;
|
---|
1258 |
|
---|
1259 | if (pkcsBlockLen < inputLen + 1) {
|
---|
1260 | WOLFSSL_MSG("RsaPad error, invalid length");
|
---|
1261 | return RSA_PAD_E;
|
---|
1262 | }
|
---|
1263 |
|
---|
1264 | padLen = pkcsBlockLen - inputLen - 1;
|
---|
1265 | ret = wc_RNG_GenerateBlock(rng, &pkcsBlock[1], padLen);
|
---|
1266 | if (ret != 0) {
|
---|
1267 | return ret;
|
---|
1268 | }
|
---|
1269 |
|
---|
1270 | /* remove zeros */
|
---|
1271 | for (i = 1; i < padLen; i++) {
|
---|
1272 | if (pkcsBlock[i] == 0) pkcsBlock[i] = 0x01;
|
---|
1273 | }
|
---|
1274 | #else
|
---|
1275 | (void)rng;
|
---|
1276 | return RSA_WRONG_TYPE_E;
|
---|
1277 | #endif
|
---|
1278 | }
|
---|
1279 |
|
---|
1280 | pkcsBlock[pkcsBlockLen-inputLen-1] = 0; /* separator */
|
---|
1281 | XMEMCPY(pkcsBlock+pkcsBlockLen-inputLen, input, inputLen);
|
---|
1282 |
|
---|
1283 | return 0;
|
---|
1284 | }
|
---|
1285 |
|
---|
1286 | /* helper function to direct which padding is used */
|
---|
1287 | int wc_RsaPad_ex(const byte* input, word32 inputLen, byte* pkcsBlock,
|
---|
1288 | word32 pkcsBlockLen, byte padValue, WC_RNG* rng, int padType,
|
---|
1289 | enum wc_HashType hType, int mgf, byte* optLabel, word32 labelLen,
|
---|
1290 | int saltLen, int bits, void* heap)
|
---|
1291 | {
|
---|
1292 | int ret;
|
---|
1293 |
|
---|
1294 | switch (padType)
|
---|
1295 | {
|
---|
1296 | case WC_RSA_PKCSV15_PAD:
|
---|
1297 | /*WOLFSSL_MSG("wolfSSL Using RSA PKCSV15 padding");*/
|
---|
1298 | ret = RsaPad(input, inputLen, pkcsBlock, pkcsBlockLen,
|
---|
1299 | padValue, rng);
|
---|
1300 | break;
|
---|
1301 |
|
---|
1302 | #ifndef WC_NO_RNG
|
---|
1303 | #ifndef WC_NO_RSA_OAEP
|
---|
1304 | case WC_RSA_OAEP_PAD:
|
---|
1305 | WOLFSSL_MSG("wolfSSL Using RSA OAEP padding");
|
---|
1306 | ret = RsaPad_OAEP(input, inputLen, pkcsBlock, pkcsBlockLen,
|
---|
1307 | padValue, rng, hType, mgf, optLabel, labelLen, heap);
|
---|
1308 | break;
|
---|
1309 | #endif
|
---|
1310 |
|
---|
1311 | #ifdef WC_RSA_PSS
|
---|
1312 | case WC_RSA_PSS_PAD:
|
---|
1313 | WOLFSSL_MSG("wolfSSL Using RSA PSS padding");
|
---|
1314 | ret = RsaPad_PSS(input, inputLen, pkcsBlock, pkcsBlockLen, rng,
|
---|
1315 | hType, mgf, saltLen, bits, heap);
|
---|
1316 | break;
|
---|
1317 | #endif
|
---|
1318 | #endif /* !WC_NO_RNG */
|
---|
1319 |
|
---|
1320 | #ifdef WC_RSA_NO_PADDING
|
---|
1321 | case WC_RSA_NO_PAD:
|
---|
1322 | WOLFSSL_MSG("wolfSSL Using NO padding");
|
---|
1323 |
|
---|
1324 | /* In the case of no padding being used check that input is exactly
|
---|
1325 | * the RSA key length */
|
---|
1326 | if (bits <= 0 || inputLen != ((word32)bits/WOLFSSL_BIT_SIZE)) {
|
---|
1327 | WOLFSSL_MSG("Bad input size");
|
---|
1328 | ret = RSA_PAD_E;
|
---|
1329 | }
|
---|
1330 | else {
|
---|
1331 | XMEMCPY(pkcsBlock, input, inputLen);
|
---|
1332 | ret = 0;
|
---|
1333 | }
|
---|
1334 | break;
|
---|
1335 | #endif
|
---|
1336 |
|
---|
1337 | default:
|
---|
1338 | WOLFSSL_MSG("Unknown RSA Pad Type");
|
---|
1339 | ret = RSA_PAD_E;
|
---|
1340 | }
|
---|
1341 |
|
---|
1342 | /* silence warning if not used with padding scheme */
|
---|
1343 | (void)input;
|
---|
1344 | (void)inputLen;
|
---|
1345 | (void)pkcsBlock;
|
---|
1346 | (void)pkcsBlockLen;
|
---|
1347 | (void)padValue;
|
---|
1348 | (void)rng;
|
---|
1349 | (void)padType;
|
---|
1350 | (void)hType;
|
---|
1351 | (void)mgf;
|
---|
1352 | (void)optLabel;
|
---|
1353 | (void)labelLen;
|
---|
1354 | (void)saltLen;
|
---|
1355 | (void)bits;
|
---|
1356 | (void)heap;
|
---|
1357 |
|
---|
1358 | return ret;
|
---|
1359 | }
|
---|
1360 | #endif /* WOLFSSL_RSA_VERIFY_ONLY */
|
---|
1361 |
|
---|
1362 |
|
---|
1363 | /* UnPadding */
|
---|
1364 | #ifndef WC_NO_RSA_OAEP
|
---|
1365 | /* UnPad plaintext, set start to *output, return length of plaintext,
|
---|
1366 | * < 0 on error */
|
---|
1367 | static int RsaUnPad_OAEP(byte *pkcsBlock, unsigned int pkcsBlockLen,
|
---|
1368 | byte **output, enum wc_HashType hType, int mgf,
|
---|
1369 | byte* optLabel, word32 labelLen, void* heap)
|
---|
1370 | {
|
---|
1371 | int hLen;
|
---|
1372 | int ret;
|
---|
1373 | byte h[WC_MAX_DIGEST_SIZE]; /* max digest size */
|
---|
1374 | byte* tmp;
|
---|
1375 | word32 idx;
|
---|
1376 |
|
---|
1377 | /* no label is allowed, but catch if no label provided and length > 0 */
|
---|
1378 | if (optLabel == NULL && labelLen > 0) {
|
---|
1379 | return BUFFER_E;
|
---|
1380 | }
|
---|
1381 |
|
---|
1382 | hLen = wc_HashGetDigestSize(hType);
|
---|
1383 | if ((hLen < 0) || (pkcsBlockLen < (2 * (word32)hLen + 2))) {
|
---|
1384 | return BAD_FUNC_ARG;
|
---|
1385 | }
|
---|
1386 |
|
---|
1387 | tmp = (byte*)XMALLOC(pkcsBlockLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1388 | if (tmp == NULL) {
|
---|
1389 | return MEMORY_E;
|
---|
1390 | }
|
---|
1391 | XMEMSET(tmp, 0, pkcsBlockLen);
|
---|
1392 |
|
---|
1393 | /* find seedMask value */
|
---|
1394 | if ((ret = RsaMGF(mgf, (byte*)(pkcsBlock + (hLen + 1)),
|
---|
1395 | pkcsBlockLen - hLen - 1, tmp, hLen, heap)) != 0) {
|
---|
1396 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1397 | return ret;
|
---|
1398 | }
|
---|
1399 |
|
---|
1400 | /* xor seedMask value with maskedSeed to get seed value */
|
---|
1401 | for (idx = 0; idx < (word32)hLen; idx++) {
|
---|
1402 | tmp[idx] = tmp[idx] ^ pkcsBlock[1 + idx];
|
---|
1403 | }
|
---|
1404 |
|
---|
1405 | /* get dbMask value */
|
---|
1406 | if ((ret = RsaMGF(mgf, tmp, hLen, tmp + hLen,
|
---|
1407 | pkcsBlockLen - hLen - 1, heap)) != 0) {
|
---|
1408 | XFREE(tmp, NULL, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1409 | return ret;
|
---|
1410 | }
|
---|
1411 |
|
---|
1412 | /* get DB value by doing maskedDB xor dbMask */
|
---|
1413 | for (idx = 0; idx < (pkcsBlockLen - hLen - 1); idx++) {
|
---|
1414 | pkcsBlock[hLen + 1 + idx] = pkcsBlock[hLen + 1 + idx] ^ tmp[idx + hLen];
|
---|
1415 | }
|
---|
1416 |
|
---|
1417 | /* done with use of tmp buffer */
|
---|
1418 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1419 |
|
---|
1420 | /* advance idx to index of PS and msg separator, account for PS size of 0*/
|
---|
1421 | idx = hLen + 1 + hLen;
|
---|
1422 | while (idx < pkcsBlockLen && pkcsBlock[idx] == 0) {idx++;}
|
---|
1423 |
|
---|
1424 | /* create hash of label for comparison with hash sent */
|
---|
1425 | if ((ret = wc_Hash(hType, optLabel, labelLen, h, hLen)) != 0) {
|
---|
1426 | return ret;
|
---|
1427 | }
|
---|
1428 |
|
---|
1429 | /* say no to chosen ciphertext attack.
|
---|
1430 | Comparison of lHash, Y, and separator value needs to all happen in
|
---|
1431 | constant time.
|
---|
1432 | Attackers should not be able to get error condition from the timing of
|
---|
1433 | these checks.
|
---|
1434 | */
|
---|
1435 | ret = 0;
|
---|
1436 | ret |= ConstantCompare(pkcsBlock + hLen + 1, h, hLen);
|
---|
1437 | ret += pkcsBlock[idx++] ^ 0x01; /* separator value is 0x01 */
|
---|
1438 | ret += pkcsBlock[0] ^ 0x00; /* Y, the first value, should be 0 */
|
---|
1439 |
|
---|
1440 | /* Return 0 data length on error. */
|
---|
1441 | idx = ctMaskSelInt(ctMaskEq(ret, 0), idx, pkcsBlockLen);
|
---|
1442 |
|
---|
1443 | /* adjust pointer to correct location in array and return size of M */
|
---|
1444 | *output = (byte*)(pkcsBlock + idx);
|
---|
1445 | return pkcsBlockLen - idx;
|
---|
1446 | }
|
---|
1447 | #endif /* WC_NO_RSA_OAEP */
|
---|
1448 |
|
---|
1449 | #ifdef WC_RSA_PSS
|
---|
1450 | /* 0x00 .. 0x00 0x01 | Salt | Gen Hash | 0xbc
|
---|
1451 | * MGF over all bytes down to end of Salt
|
---|
1452 | *
|
---|
1453 | * pkcsBlock Buffer holding decrypted data.
|
---|
1454 | * pkcsBlockLen Length of buffer.
|
---|
1455 | * htype Hash function to use.
|
---|
1456 | * mgf Mask generation function.
|
---|
1457 | * saltLen Length of salt to put in padding.
|
---|
1458 | * bits Length of key in bits.
|
---|
1459 | * heap Used for dynamic memory allocation.
|
---|
1460 | * returns 0 on success, PSS_SALTLEN_E when the salt length is invalid,
|
---|
1461 | * BAD_PADDING_E when the padding is not valid, MEMORY_E when allocation fails
|
---|
1462 | * and other negative values on error.
|
---|
1463 | */
|
---|
1464 | static int RsaUnPad_PSS(byte *pkcsBlock, unsigned int pkcsBlockLen,
|
---|
1465 | byte **output, enum wc_HashType hType, int mgf,
|
---|
1466 | int saltLen, int bits, void* heap)
|
---|
1467 | {
|
---|
1468 | int ret;
|
---|
1469 | byte* tmp;
|
---|
1470 | int hLen, i, maskLen;
|
---|
1471 | #ifdef WOLFSSL_SHA512
|
---|
1472 | int orig_bits = bits;
|
---|
1473 | #endif
|
---|
1474 | #if defined(WOLFSSL_NO_MALLOC) && !defined(WOLFSSL_STATIC_MEMORY)
|
---|
1475 | byte tmp_buf[RSA_MAX_SIZE/8];
|
---|
1476 | tmp = tmp_buf;
|
---|
1477 |
|
---|
1478 | if (pkcsBlockLen > RSA_MAX_SIZE/8) {
|
---|
1479 | return MEMORY_E;
|
---|
1480 | }
|
---|
1481 | #endif
|
---|
1482 |
|
---|
1483 | hLen = wc_HashGetDigestSize(hType);
|
---|
1484 | if (hLen < 0)
|
---|
1485 | return hLen;
|
---|
1486 | bits = (bits - 1) & 0x7;
|
---|
1487 | if ((pkcsBlock[0] & (0xff << bits)) != 0) {
|
---|
1488 | return BAD_PADDING_E;
|
---|
1489 | }
|
---|
1490 | if (bits == 0) {
|
---|
1491 | pkcsBlock++;
|
---|
1492 | pkcsBlockLen--;
|
---|
1493 | }
|
---|
1494 | maskLen = (int)pkcsBlockLen - 1 - hLen;
|
---|
1495 | if (maskLen < 0) {
|
---|
1496 | WOLFSSL_MSG("RsaUnPad_PSS: Hash too large");
|
---|
1497 | return WC_KEY_SIZE_E;
|
---|
1498 | }
|
---|
1499 |
|
---|
1500 | if (saltLen == RSA_PSS_SALT_LEN_DEFAULT) {
|
---|
1501 | saltLen = hLen;
|
---|
1502 | #ifdef WOLFSSL_SHA512
|
---|
1503 | /* See FIPS 186-4 section 5.5 item (e). */
|
---|
1504 | if (orig_bits == 1024 && hLen == WC_SHA512_DIGEST_SIZE)
|
---|
1505 | saltLen = RSA_PSS_SALT_MAX_SZ;
|
---|
1506 | #endif
|
---|
1507 | }
|
---|
1508 | #ifndef WOLFSSL_PSS_LONG_SALT
|
---|
1509 | else if (saltLen > hLen)
|
---|
1510 | return PSS_SALTLEN_E;
|
---|
1511 | #endif
|
---|
1512 | #ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
1513 | else if (saltLen < RSA_PSS_SALT_LEN_DEFAULT)
|
---|
1514 | return PSS_SALTLEN_E;
|
---|
1515 | if (maskLen < saltLen + 1) {
|
---|
1516 | return PSS_SALTLEN_E;
|
---|
1517 | }
|
---|
1518 | #else
|
---|
1519 | else if (saltLen < RSA_PSS_SALT_LEN_DISCOVER)
|
---|
1520 | return PSS_SALTLEN_E;
|
---|
1521 | if (saltLen != RSA_PSS_SALT_LEN_DISCOVER && maskLen < saltLen + 1) {
|
---|
1522 | return WC_KEY_SIZE_E;
|
---|
1523 | }
|
---|
1524 | #endif
|
---|
1525 |
|
---|
1526 | if (pkcsBlock[pkcsBlockLen - 1] != RSA_PSS_PAD_TERM) {
|
---|
1527 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Term Error");
|
---|
1528 | return BAD_PADDING_E;
|
---|
1529 | }
|
---|
1530 |
|
---|
1531 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
1532 | tmp = (byte*)XMALLOC(maskLen, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1533 | if (tmp == NULL) {
|
---|
1534 | return MEMORY_E;
|
---|
1535 | }
|
---|
1536 | #endif
|
---|
1537 |
|
---|
1538 | if ((ret = RsaMGF(mgf, pkcsBlock + maskLen, hLen, tmp, maskLen,
|
---|
1539 | heap)) != 0) {
|
---|
1540 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1541 | return ret;
|
---|
1542 | }
|
---|
1543 |
|
---|
1544 | tmp[0] &= (1 << bits) - 1;
|
---|
1545 | pkcsBlock[0] &= (1 << bits) - 1;
|
---|
1546 | #ifdef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
1547 | if (saltLen == RSA_PSS_SALT_LEN_DISCOVER) {
|
---|
1548 | for (i = 0; i < maskLen - 1; i++) {
|
---|
1549 | if (tmp[i] != pkcsBlock[i]) {
|
---|
1550 | break;
|
---|
1551 | }
|
---|
1552 | }
|
---|
1553 | if (tmp[i] != (pkcsBlock[i] ^ 0x01)) {
|
---|
1554 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1555 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Error Match");
|
---|
1556 | return PSS_SALTLEN_RECOVER_E;
|
---|
1557 | }
|
---|
1558 | saltLen = maskLen - (i + 1);
|
---|
1559 | }
|
---|
1560 | else
|
---|
1561 | #endif
|
---|
1562 | {
|
---|
1563 | for (i = 0; i < maskLen - 1 - saltLen; i++) {
|
---|
1564 | if (tmp[i] != pkcsBlock[i]) {
|
---|
1565 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1566 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Error Match");
|
---|
1567 | return PSS_SALTLEN_E;
|
---|
1568 | }
|
---|
1569 | }
|
---|
1570 | if (tmp[i] != (pkcsBlock[i] ^ 0x01)) {
|
---|
1571 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1572 | WOLFSSL_MSG("RsaUnPad_PSS: Padding Error End");
|
---|
1573 | return PSS_SALTLEN_E;
|
---|
1574 | }
|
---|
1575 | }
|
---|
1576 | for (i++; i < maskLen; i++)
|
---|
1577 | pkcsBlock[i] ^= tmp[i];
|
---|
1578 |
|
---|
1579 | #if !defined(WOLFSSL_NO_MALLOC) || defined(WOLFSSL_STATIC_MEMORY)
|
---|
1580 | XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
1581 | #endif
|
---|
1582 |
|
---|
1583 | *output = pkcsBlock + maskLen - saltLen;
|
---|
1584 | return saltLen + hLen;
|
---|
1585 | }
|
---|
1586 | #endif
|
---|
1587 |
|
---|
1588 | /* UnPad plaintext, set start to *output, return length of plaintext,
|
---|
1589 | * < 0 on error */
|
---|
1590 | static int RsaUnPad(const byte *pkcsBlock, unsigned int pkcsBlockLen,
|
---|
1591 | byte **output, byte padValue)
|
---|
1592 | {
|
---|
1593 | int ret = BAD_FUNC_ARG;
|
---|
1594 | word16 i;
|
---|
1595 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
1596 | byte invalid = 0;
|
---|
1597 | #endif
|
---|
1598 |
|
---|
1599 | if (output == NULL || pkcsBlockLen == 0 || pkcsBlockLen > 0xFFFF) {
|
---|
1600 | return BAD_FUNC_ARG;
|
---|
1601 | }
|
---|
1602 |
|
---|
1603 | if (padValue == RSA_BLOCK_TYPE_1) {
|
---|
1604 | /* First byte must be 0x00 and Second byte, block type, 0x01 */
|
---|
1605 | if (pkcsBlock[0] != 0 || pkcsBlock[1] != RSA_BLOCK_TYPE_1) {
|
---|
1606 | WOLFSSL_MSG("RsaUnPad error, invalid formatting");
|
---|
1607 | return RSA_PAD_E;
|
---|
1608 | }
|
---|
1609 |
|
---|
1610 | /* check the padding until we find the separator */
|
---|
1611 | for (i = 2; i < pkcsBlockLen && pkcsBlock[i++] == 0xFF; ) { }
|
---|
1612 |
|
---|
1613 | /* Minimum of 11 bytes of pre-message data and must have separator. */
|
---|
1614 | if (i < RSA_MIN_PAD_SZ || pkcsBlock[i-1] != 0) {
|
---|
1615 | WOLFSSL_MSG("RsaUnPad error, bad formatting");
|
---|
1616 | return RSA_PAD_E;
|
---|
1617 | }
|
---|
1618 |
|
---|
1619 | *output = (byte *)(pkcsBlock + i);
|
---|
1620 | ret = pkcsBlockLen - i;
|
---|
1621 | }
|
---|
1622 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
1623 | else {
|
---|
1624 | word16 j;
|
---|
1625 | word16 pastSep = 0;
|
---|
1626 |
|
---|
1627 | /* Decrypted with private key - unpad must be constant time. */
|
---|
1628 | for (i = 0, j = 2; j < pkcsBlockLen; j++) {
|
---|
1629 | /* Update i if not passed the separator and at separator. */
|
---|
1630 | i |= (~pastSep) & ctMask16Eq(pkcsBlock[j], 0x00) & (j + 1);
|
---|
1631 | pastSep |= ctMask16Eq(pkcsBlock[j], 0x00);
|
---|
1632 | }
|
---|
1633 |
|
---|
1634 | /* Minimum of 11 bytes of pre-message data - including leading 0x00. */
|
---|
1635 | invalid |= ctMaskLT(i, RSA_MIN_PAD_SZ);
|
---|
1636 | /* Must have seen separator. */
|
---|
1637 | invalid |= ~pastSep;
|
---|
1638 | /* First byte must be 0x00. */
|
---|
1639 | invalid |= ctMaskNotEq(pkcsBlock[0], 0x00);
|
---|
1640 | /* Check against expected block type: padValue */
|
---|
1641 | invalid |= ctMaskNotEq(pkcsBlock[1], padValue);
|
---|
1642 |
|
---|
1643 | *output = (byte *)(pkcsBlock + i);
|
---|
1644 | ret = ((int)~invalid) & (pkcsBlockLen - i);
|
---|
1645 | }
|
---|
1646 | #endif
|
---|
1647 |
|
---|
1648 | return ret;
|
---|
1649 | }
|
---|
1650 |
|
---|
1651 | /* helper function to direct unpadding
|
---|
1652 | *
|
---|
1653 | * bits is the key modulus size in bits
|
---|
1654 | */
|
---|
1655 | int wc_RsaUnPad_ex(byte* pkcsBlock, word32 pkcsBlockLen, byte** out,
|
---|
1656 | byte padValue, int padType, enum wc_HashType hType,
|
---|
1657 | int mgf, byte* optLabel, word32 labelLen, int saltLen,
|
---|
1658 | int bits, void* heap)
|
---|
1659 | {
|
---|
1660 | int ret;
|
---|
1661 |
|
---|
1662 | switch (padType) {
|
---|
1663 | case WC_RSA_PKCSV15_PAD:
|
---|
1664 | /*WOLFSSL_MSG("wolfSSL Using RSA PKCSV15 un-padding");*/
|
---|
1665 | ret = RsaUnPad(pkcsBlock, pkcsBlockLen, out, padValue);
|
---|
1666 | break;
|
---|
1667 |
|
---|
1668 | #ifndef WC_NO_RSA_OAEP
|
---|
1669 | case WC_RSA_OAEP_PAD:
|
---|
1670 | WOLFSSL_MSG("wolfSSL Using RSA OAEP un-padding");
|
---|
1671 | ret = RsaUnPad_OAEP((byte*)pkcsBlock, pkcsBlockLen, out,
|
---|
1672 | hType, mgf, optLabel, labelLen, heap);
|
---|
1673 | break;
|
---|
1674 | #endif
|
---|
1675 |
|
---|
1676 | #ifdef WC_RSA_PSS
|
---|
1677 | case WC_RSA_PSS_PAD:
|
---|
1678 | WOLFSSL_MSG("wolfSSL Using RSA PSS un-padding");
|
---|
1679 | ret = RsaUnPad_PSS((byte*)pkcsBlock, pkcsBlockLen, out, hType, mgf,
|
---|
1680 | saltLen, bits, heap);
|
---|
1681 | break;
|
---|
1682 | #endif
|
---|
1683 |
|
---|
1684 | #ifdef WC_RSA_NO_PADDING
|
---|
1685 | case WC_RSA_NO_PAD:
|
---|
1686 | WOLFSSL_MSG("wolfSSL Using NO un-padding");
|
---|
1687 |
|
---|
1688 | /* In the case of no padding being used check that input is exactly
|
---|
1689 | * the RSA key length */
|
---|
1690 | if (bits <= 0 || pkcsBlockLen !=
|
---|
1691 | ((word32)(bits+WOLFSSL_BIT_SIZE-1)/WOLFSSL_BIT_SIZE)) {
|
---|
1692 | WOLFSSL_MSG("Bad input size");
|
---|
1693 | ret = RSA_PAD_E;
|
---|
1694 | }
|
---|
1695 | else {
|
---|
1696 | if (out != NULL) {
|
---|
1697 | *out = pkcsBlock;
|
---|
1698 | }
|
---|
1699 | ret = pkcsBlockLen;
|
---|
1700 | }
|
---|
1701 | break;
|
---|
1702 | #endif /* WC_RSA_NO_PADDING */
|
---|
1703 |
|
---|
1704 | default:
|
---|
1705 | WOLFSSL_MSG("Unknown RSA UnPad Type");
|
---|
1706 | ret = RSA_PAD_E;
|
---|
1707 | }
|
---|
1708 |
|
---|
1709 | /* silence warning if not used with padding scheme */
|
---|
1710 | (void)hType;
|
---|
1711 | (void)mgf;
|
---|
1712 | (void)optLabel;
|
---|
1713 | (void)labelLen;
|
---|
1714 | (void)saltLen;
|
---|
1715 | (void)bits;
|
---|
1716 | (void)heap;
|
---|
1717 |
|
---|
1718 | return ret;
|
---|
1719 | }
|
---|
1720 |
|
---|
1721 | #if defined(WOLFSSL_XILINX_CRYPT)
|
---|
1722 | /*
|
---|
1723 | * Xilinx hardened crypto acceleration.
|
---|
1724 | *
|
---|
1725 | * Returns 0 on success and negative values on error.
|
---|
1726 | */
|
---|
1727 | static int wc_RsaFunctionXil(const byte* in, word32 inLen, byte* out,
|
---|
1728 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
1729 | {
|
---|
1730 | int ret = 0;
|
---|
1731 | word32 keyLen;
|
---|
1732 | (void)rng;
|
---|
1733 |
|
---|
1734 | keyLen = wc_RsaEncryptSize(key);
|
---|
1735 | if (keyLen > *outLen) {
|
---|
1736 | WOLFSSL_MSG("Output buffer is not big enough");
|
---|
1737 | return BAD_FUNC_ARG;
|
---|
1738 | }
|
---|
1739 |
|
---|
1740 | if (inLen != keyLen) {
|
---|
1741 | WOLFSSL_MSG("Expected that inLen equals RSA key length");
|
---|
1742 | return BAD_FUNC_ARG;
|
---|
1743 | }
|
---|
1744 |
|
---|
1745 | switch(type) {
|
---|
1746 | case RSA_PRIVATE_DECRYPT:
|
---|
1747 | case RSA_PRIVATE_ENCRYPT:
|
---|
1748 | /* Currently public exponent is loaded by default.
|
---|
1749 | * In SDK 2017.1 RSA exponent values are expected to be of 4 bytes
|
---|
1750 | * leading to private key operations with Xsecure_RsaDecrypt not being
|
---|
1751 | * supported */
|
---|
1752 | ret = RSA_WRONG_TYPE_E;
|
---|
1753 | break;
|
---|
1754 | case RSA_PUBLIC_ENCRYPT:
|
---|
1755 | case RSA_PUBLIC_DECRYPT:
|
---|
1756 | if (XSecure_RsaDecrypt(&(key->xRsa), in, out) != XST_SUCCESS) {
|
---|
1757 | ret = BAD_STATE_E;
|
---|
1758 | }
|
---|
1759 | break;
|
---|
1760 | default:
|
---|
1761 | ret = RSA_WRONG_TYPE_E;
|
---|
1762 | }
|
---|
1763 |
|
---|
1764 | *outLen = keyLen;
|
---|
1765 |
|
---|
1766 | return ret;
|
---|
1767 | }
|
---|
1768 | #endif /* WOLFSSL_XILINX_CRYPT */
|
---|
1769 |
|
---|
1770 | #ifdef WC_RSA_NONBLOCK
|
---|
1771 | static int wc_RsaFunctionNonBlock(const byte* in, word32 inLen, byte* out,
|
---|
1772 | word32* outLen, int type, RsaKey* key)
|
---|
1773 | {
|
---|
1774 | int ret = 0;
|
---|
1775 | word32 keyLen, len;
|
---|
1776 |
|
---|
1777 | if (key == NULL || key->nb == NULL) {
|
---|
1778 | return BAD_FUNC_ARG;
|
---|
1779 | }
|
---|
1780 |
|
---|
1781 | if (key->nb->exptmod.state == TFM_EXPTMOD_NB_INIT) {
|
---|
1782 | if (mp_init(&key->nb->tmp) != MP_OKAY) {
|
---|
1783 | ret = MP_INIT_E;
|
---|
1784 | }
|
---|
1785 |
|
---|
1786 | if (ret == 0) {
|
---|
1787 | if (mp_read_unsigned_bin(&key->nb->tmp, (byte*)in, inLen) != MP_OKAY) {
|
---|
1788 | ret = MP_READ_E;
|
---|
1789 | }
|
---|
1790 | }
|
---|
1791 | }
|
---|
1792 |
|
---|
1793 | if (ret == 0) {
|
---|
1794 | switch(type) {
|
---|
1795 | case RSA_PRIVATE_DECRYPT:
|
---|
1796 | case RSA_PRIVATE_ENCRYPT:
|
---|
1797 | ret = fp_exptmod_nb(&key->nb->exptmod, &key->nb->tmp, &key->d,
|
---|
1798 | &key->n, &key->nb->tmp);
|
---|
1799 | if (ret == FP_WOULDBLOCK)
|
---|
1800 | return ret;
|
---|
1801 | if (ret != MP_OKAY)
|
---|
1802 | ret = MP_EXPTMOD_E;
|
---|
1803 | break;
|
---|
1804 |
|
---|
1805 | case RSA_PUBLIC_ENCRYPT:
|
---|
1806 | case RSA_PUBLIC_DECRYPT:
|
---|
1807 | ret = fp_exptmod_nb(&key->nb->exptmod, &key->nb->tmp, &key->e,
|
---|
1808 | &key->n, &key->nb->tmp);
|
---|
1809 | if (ret == FP_WOULDBLOCK)
|
---|
1810 | return ret;
|
---|
1811 | if (ret != MP_OKAY)
|
---|
1812 | ret = MP_EXPTMOD_E;
|
---|
1813 | break;
|
---|
1814 | default:
|
---|
1815 | ret = RSA_WRONG_TYPE_E;
|
---|
1816 | break;
|
---|
1817 | }
|
---|
1818 | }
|
---|
1819 |
|
---|
1820 | if (ret == 0) {
|
---|
1821 | keyLen = wc_RsaEncryptSize(key);
|
---|
1822 | if (keyLen > *outLen)
|
---|
1823 | ret = RSA_BUFFER_E;
|
---|
1824 | }
|
---|
1825 | if (ret == 0) {
|
---|
1826 | len = mp_unsigned_bin_size(&key->nb->tmp);
|
---|
1827 |
|
---|
1828 | /* pad front w/ zeros to match key length */
|
---|
1829 | while (len < keyLen) {
|
---|
1830 | *out++ = 0x00;
|
---|
1831 | len++;
|
---|
1832 | }
|
---|
1833 |
|
---|
1834 | *outLen = keyLen;
|
---|
1835 |
|
---|
1836 | /* convert */
|
---|
1837 | if (mp_to_unsigned_bin(&key->nb->tmp, out) != MP_OKAY) {
|
---|
1838 | ret = MP_TO_E;
|
---|
1839 | }
|
---|
1840 | }
|
---|
1841 |
|
---|
1842 | mp_clear(&key->nb->tmp);
|
---|
1843 |
|
---|
1844 | return ret;
|
---|
1845 | }
|
---|
1846 | #endif /* WC_RSA_NONBLOCK */
|
---|
1847 |
|
---|
1848 | #ifdef WOLFSSL_AFALG_XILINX_RSA
|
---|
1849 | #ifndef ERROR_OUT
|
---|
1850 | #define ERROR_OUT(x) ret = (x); goto done
|
---|
1851 | #endif
|
---|
1852 |
|
---|
1853 | static const char WC_TYPE_ASYMKEY[] = "skcipher";
|
---|
1854 | static const char WC_NAME_RSA[] = "xilinx-zynqmp-rsa";
|
---|
1855 | #ifndef MAX_XILINX_RSA_KEY
|
---|
1856 | /* max key size of 4096 bits / 512 bytes */
|
---|
1857 | #define MAX_XILINX_RSA_KEY 512
|
---|
1858 | #endif
|
---|
1859 | static const byte XILINX_RSA_FLAG[] = {0x1};
|
---|
1860 |
|
---|
1861 |
|
---|
1862 | /* AF_ALG implementation of RSA */
|
---|
1863 | static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
|
---|
1864 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
1865 | {
|
---|
1866 | struct msghdr msg;
|
---|
1867 | struct cmsghdr* cmsg;
|
---|
1868 | struct iovec iov;
|
---|
1869 | byte* keyBuf = NULL;
|
---|
1870 | word32 keyBufSz = 0;
|
---|
1871 | char cbuf[CMSG_SPACE(4) + CMSG_SPACE(sizeof(struct af_alg_iv) + 1)] = {0};
|
---|
1872 | int ret = 0;
|
---|
1873 | int op = 0; /* decryption vs encryption flag */
|
---|
1874 | word32 keyLen;
|
---|
1875 |
|
---|
1876 | /* input and output buffer need to be aligned */
|
---|
1877 | ALIGN64 byte outBuf[MAX_XILINX_RSA_KEY];
|
---|
1878 | ALIGN64 byte inBuf[MAX_XILINX_RSA_KEY];
|
---|
1879 |
|
---|
1880 | XMEMSET(&msg, 0, sizeof(struct msghdr));
|
---|
1881 | (void)rng;
|
---|
1882 |
|
---|
1883 | keyLen = wc_RsaEncryptSize(key);
|
---|
1884 | if (keyLen > *outLen) {
|
---|
1885 | ERROR_OUT(RSA_BUFFER_E);
|
---|
1886 | }
|
---|
1887 |
|
---|
1888 | if (keyLen > MAX_XILINX_RSA_KEY) {
|
---|
1889 | WOLFSSL_MSG("RSA key size larger than supported");
|
---|
1890 | ERROR_OUT(BAD_FUNC_ARG);
|
---|
1891 | }
|
---|
1892 |
|
---|
1893 | if ((keyBuf = (byte*)XMALLOC(keyLen * 2, key->heap, DYNAMIC_TYPE_KEY))
|
---|
1894 | == NULL) {
|
---|
1895 | ERROR_OUT(MEMORY_E);
|
---|
1896 | }
|
---|
1897 |
|
---|
1898 | if ((ret = mp_to_unsigned_bin(&(key->n), keyBuf)) != MP_OKAY) {
|
---|
1899 | ERROR_OUT(MP_TO_E);
|
---|
1900 | }
|
---|
1901 |
|
---|
1902 | switch(type) {
|
---|
1903 | case RSA_PRIVATE_DECRYPT:
|
---|
1904 | case RSA_PRIVATE_ENCRYPT:
|
---|
1905 | op = 1; /* set as decrypt */
|
---|
1906 | {
|
---|
1907 | keyBufSz = mp_unsigned_bin_size(&(key->d));
|
---|
1908 | if ((mp_to_unsigned_bin(&(key->d), keyBuf + keyLen))
|
---|
1909 | != MP_OKAY) {
|
---|
1910 | ERROR_OUT(MP_TO_E);
|
---|
1911 | }
|
---|
1912 | }
|
---|
1913 | break;
|
---|
1914 |
|
---|
1915 | case RSA_PUBLIC_DECRYPT:
|
---|
1916 | case RSA_PUBLIC_ENCRYPT: {
|
---|
1917 | word32 exp = 0;
|
---|
1918 | word32 eSz = mp_unsigned_bin_size(&(key->e));
|
---|
1919 | if ((mp_to_unsigned_bin(&(key->e), (byte*)&exp +
|
---|
1920 | (sizeof(word32) - eSz))) != MP_OKAY) {
|
---|
1921 | ERROR_OUT(MP_TO_E);
|
---|
1922 | }
|
---|
1923 | keyBufSz = sizeof(word32);
|
---|
1924 | XMEMCPY(keyBuf + keyLen, (byte*)&exp, keyBufSz);
|
---|
1925 | break;
|
---|
1926 | }
|
---|
1927 |
|
---|
1928 | default:
|
---|
1929 | ERROR_OUT(RSA_WRONG_TYPE_E);
|
---|
1930 | }
|
---|
1931 | keyBufSz += keyLen; /* add size of modulus */
|
---|
1932 |
|
---|
1933 | /* check for existing sockets before creating new ones */
|
---|
1934 | if (key->alFd > 0) {
|
---|
1935 | close(key->alFd);
|
---|
1936 | key->alFd = WC_SOCK_NOTSET;
|
---|
1937 | }
|
---|
1938 | if (key->rdFd > 0) {
|
---|
1939 | close(key->rdFd);
|
---|
1940 | key->rdFd = WC_SOCK_NOTSET;
|
---|
1941 | }
|
---|
1942 |
|
---|
1943 | /* create new sockets and set the key to use */
|
---|
1944 | if ((key->alFd = wc_Afalg_Socket()) < 0) {
|
---|
1945 | WOLFSSL_MSG("Unable to create socket");
|
---|
1946 | ERROR_OUT(key->alFd);
|
---|
1947 | }
|
---|
1948 | if ((key->rdFd = wc_Afalg_CreateRead(key->alFd, WC_TYPE_ASYMKEY,
|
---|
1949 | WC_NAME_RSA)) < 0) {
|
---|
1950 | WOLFSSL_MSG("Unable to bind and create read/send socket");
|
---|
1951 | ERROR_OUT(key->rdFd);
|
---|
1952 | }
|
---|
1953 | if ((ret = setsockopt(key->alFd, SOL_ALG, ALG_SET_KEY, keyBuf,
|
---|
1954 | keyBufSz)) < 0) {
|
---|
1955 | WOLFSSL_MSG("Error setting RSA key");
|
---|
1956 | ERROR_OUT(ret);
|
---|
1957 | }
|
---|
1958 |
|
---|
1959 | msg.msg_control = cbuf;
|
---|
1960 | msg.msg_controllen = sizeof(cbuf);
|
---|
1961 | cmsg = CMSG_FIRSTHDR(&msg);
|
---|
1962 | if ((ret = wc_Afalg_SetOp(cmsg, op)) < 0) {
|
---|
1963 | ERROR_OUT(ret);
|
---|
1964 | }
|
---|
1965 |
|
---|
1966 | /* set flag in IV spot, needed for Xilinx hardware acceleration use */
|
---|
1967 | cmsg = CMSG_NXTHDR(&msg, cmsg);
|
---|
1968 | if ((ret = wc_Afalg_SetIv(cmsg, (byte*)XILINX_RSA_FLAG,
|
---|
1969 | sizeof(XILINX_RSA_FLAG))) != 0) {
|
---|
1970 | ERROR_OUT(ret);
|
---|
1971 | }
|
---|
1972 |
|
---|
1973 | /* compose and send msg */
|
---|
1974 | XMEMCPY(inBuf, (byte*)in, inLen); /* for alignment */
|
---|
1975 | iov.iov_base = inBuf;
|
---|
1976 | iov.iov_len = inLen;
|
---|
1977 | msg.msg_iov = &iov;
|
---|
1978 | msg.msg_iovlen = 1;
|
---|
1979 | if ((ret = sendmsg(key->rdFd, &msg, 0)) <= 0) {
|
---|
1980 | ERROR_OUT(WC_AFALG_SOCK_E);
|
---|
1981 | }
|
---|
1982 |
|
---|
1983 | if ((ret = read(key->rdFd, outBuf, inLen)) <= 0) {
|
---|
1984 | ERROR_OUT(WC_AFALG_SOCK_E);
|
---|
1985 | }
|
---|
1986 | XMEMCPY(out, outBuf, ret);
|
---|
1987 | *outLen = keyLen;
|
---|
1988 |
|
---|
1989 | done:
|
---|
1990 | /* clear key data and free buffer */
|
---|
1991 | if (keyBuf != NULL) {
|
---|
1992 | ForceZero(keyBuf, keyBufSz);
|
---|
1993 | }
|
---|
1994 | XFREE(keyBuf, key->heap, DYNAMIC_TYPE_KEY);
|
---|
1995 |
|
---|
1996 | if (key->alFd > 0) {
|
---|
1997 | close(key->alFd);
|
---|
1998 | key->alFd = WC_SOCK_NOTSET;
|
---|
1999 | }
|
---|
2000 | if (key->rdFd > 0) {
|
---|
2001 | close(key->rdFd);
|
---|
2002 | key->rdFd = WC_SOCK_NOTSET;
|
---|
2003 | }
|
---|
2004 |
|
---|
2005 | return ret;
|
---|
2006 | }
|
---|
2007 |
|
---|
2008 | #else
|
---|
2009 | static int wc_RsaFunctionSync(const byte* in, word32 inLen, byte* out,
|
---|
2010 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
2011 | {
|
---|
2012 | #ifndef WOLFSSL_SP_MATH
|
---|
2013 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2014 | mp_int* tmp;
|
---|
2015 | #ifdef WC_RSA_BLINDING
|
---|
2016 | mp_int* rnd;
|
---|
2017 | mp_int* rndi;
|
---|
2018 | #endif
|
---|
2019 | #else
|
---|
2020 | mp_int tmp[1];
|
---|
2021 | #ifdef WC_RSA_BLINDING
|
---|
2022 | mp_int rnd[1], rndi[1];
|
---|
2023 | #endif
|
---|
2024 | #endif
|
---|
2025 | int ret = 0;
|
---|
2026 | word32 keyLen = 0;
|
---|
2027 | #endif
|
---|
2028 |
|
---|
2029 | #ifdef WOLFSSL_HAVE_SP_RSA
|
---|
2030 | #ifndef WOLFSSL_SP_NO_2048
|
---|
2031 | if (mp_count_bits(&key->n) == 2048) {
|
---|
2032 | switch(type) {
|
---|
2033 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
2034 | case RSA_PRIVATE_DECRYPT:
|
---|
2035 | case RSA_PRIVATE_ENCRYPT:
|
---|
2036 | #ifdef WC_RSA_BLINDING
|
---|
2037 | if (rng == NULL)
|
---|
2038 | return MISSING_RNG_E;
|
---|
2039 | #endif
|
---|
2040 | #ifndef RSA_LOW_MEM
|
---|
2041 | return sp_RsaPrivate_2048(in, inLen, &key->d, &key->p, &key->q,
|
---|
2042 | &key->dP, &key->dQ, &key->u, &key->n,
|
---|
2043 | out, outLen);
|
---|
2044 | #else
|
---|
2045 | return sp_RsaPrivate_2048(in, inLen, &key->d, &key->p, &key->q,
|
---|
2046 | NULL, NULL, NULL, &key->n, out, outLen);
|
---|
2047 | #endif
|
---|
2048 | #endif
|
---|
2049 | case RSA_PUBLIC_ENCRYPT:
|
---|
2050 | case RSA_PUBLIC_DECRYPT:
|
---|
2051 | return sp_RsaPublic_2048(in, inLen, &key->e, &key->n, out, outLen);
|
---|
2052 | }
|
---|
2053 | }
|
---|
2054 | #endif
|
---|
2055 | #ifndef WOLFSSL_SP_NO_3072
|
---|
2056 | if (mp_count_bits(&key->n) == 3072) {
|
---|
2057 | switch(type) {
|
---|
2058 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
2059 | case RSA_PRIVATE_DECRYPT:
|
---|
2060 | case RSA_PRIVATE_ENCRYPT:
|
---|
2061 | #ifdef WC_RSA_BLINDING
|
---|
2062 | if (rng == NULL)
|
---|
2063 | return MISSING_RNG_E;
|
---|
2064 | #endif
|
---|
2065 | #ifndef RSA_LOW_MEM
|
---|
2066 | return sp_RsaPrivate_3072(in, inLen, &key->d, &key->p, &key->q,
|
---|
2067 | &key->dP, &key->dQ, &key->u, &key->n,
|
---|
2068 | out, outLen);
|
---|
2069 | #else
|
---|
2070 | return sp_RsaPrivate_3072(in, inLen, &key->d, &key->p, &key->q,
|
---|
2071 | NULL, NULL, NULL, &key->n, out, outLen);
|
---|
2072 | #endif
|
---|
2073 | #endif
|
---|
2074 | case RSA_PUBLIC_ENCRYPT:
|
---|
2075 | case RSA_PUBLIC_DECRYPT:
|
---|
2076 | return sp_RsaPublic_3072(in, inLen, &key->e, &key->n, out, outLen);
|
---|
2077 | }
|
---|
2078 | }
|
---|
2079 | #endif
|
---|
2080 | #ifdef WOLFSSL_SP_4096
|
---|
2081 | if (mp_count_bits(&key->n) == 4096) {
|
---|
2082 | switch(type) {
|
---|
2083 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
2084 | case RSA_PRIVATE_DECRYPT:
|
---|
2085 | case RSA_PRIVATE_ENCRYPT:
|
---|
2086 | #ifdef WC_RSA_BLINDING
|
---|
2087 | if (rng == NULL)
|
---|
2088 | return MISSING_RNG_E;
|
---|
2089 | #endif
|
---|
2090 | #ifndef RSA_LOW_MEM
|
---|
2091 | return sp_RsaPrivate_4096(in, inLen, &key->d, &key->p, &key->q,
|
---|
2092 | &key->dP, &key->dQ, &key->u, &key->n,
|
---|
2093 | out, outLen);
|
---|
2094 | #else
|
---|
2095 | return sp_RsaPrivate_4096(in, inLen, &key->d, &key->p, &key->q,
|
---|
2096 | NULL, NULL, NULL, &key->n, out, outLen);
|
---|
2097 | #endif
|
---|
2098 | #endif
|
---|
2099 | case RSA_PUBLIC_ENCRYPT:
|
---|
2100 | case RSA_PUBLIC_DECRYPT:
|
---|
2101 | return sp_RsaPublic_4096(in, inLen, &key->e, &key->n, out, outLen);
|
---|
2102 | }
|
---|
2103 | }
|
---|
2104 | #endif
|
---|
2105 | #endif /* WOLFSSL_HAVE_SP_RSA */
|
---|
2106 |
|
---|
2107 | #ifdef WOLFSSL_SP_MATH
|
---|
2108 | (void)rng;
|
---|
2109 | WOLFSSL_MSG("SP Key Size Error");
|
---|
2110 | return WC_KEY_SIZE_E;
|
---|
2111 | #else
|
---|
2112 | (void)rng;
|
---|
2113 |
|
---|
2114 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2115 | tmp = (mp_int*)XMALLOC(sizeof(mp_int), key->heap, DYNAMIC_TYPE_RSA);
|
---|
2116 | if (tmp == NULL)
|
---|
2117 | return MEMORY_E;
|
---|
2118 | #ifdef WC_RSA_BLINDING
|
---|
2119 | rnd = (mp_int*)XMALLOC(sizeof(mp_int) * 2, key->heap, DYNAMIC_TYPE_RSA);
|
---|
2120 | if (rnd == NULL) {
|
---|
2121 | XFREE(tmp, key->heap, DYNAMIC_TYPE_RSA);
|
---|
2122 | return MEMORY_E;
|
---|
2123 | }
|
---|
2124 | rndi = rnd + 1;
|
---|
2125 | #endif /* WC_RSA_BLINDING */
|
---|
2126 | #endif /* WOLFSSL_SMALL_STACK */
|
---|
2127 |
|
---|
2128 | if (mp_init(tmp) != MP_OKAY)
|
---|
2129 | ret = MP_INIT_E;
|
---|
2130 |
|
---|
2131 | #ifdef WC_RSA_BLINDING
|
---|
2132 | if (ret == 0) {
|
---|
2133 | if (type == RSA_PRIVATE_DECRYPT || type == RSA_PRIVATE_ENCRYPT) {
|
---|
2134 | if (mp_init_multi(rnd, rndi, NULL, NULL, NULL, NULL) != MP_OKAY) {
|
---|
2135 | mp_clear(tmp);
|
---|
2136 | ret = MP_INIT_E;
|
---|
2137 | }
|
---|
2138 | }
|
---|
2139 | }
|
---|
2140 | #endif
|
---|
2141 |
|
---|
2142 | #ifndef TEST_UNPAD_CONSTANT_TIME
|
---|
2143 | if (ret == 0 && mp_read_unsigned_bin(tmp, (byte*)in, inLen) != MP_OKAY)
|
---|
2144 | ret = MP_READ_E;
|
---|
2145 |
|
---|
2146 | if (ret == 0) {
|
---|
2147 | switch(type) {
|
---|
2148 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
2149 | case RSA_PRIVATE_DECRYPT:
|
---|
2150 | case RSA_PRIVATE_ENCRYPT:
|
---|
2151 | {
|
---|
2152 | #if defined(WC_RSA_BLINDING) && !defined(WC_NO_RNG)
|
---|
2153 | /* blind */
|
---|
2154 | ret = mp_rand(rnd, get_digit_count(&key->n), rng);
|
---|
2155 |
|
---|
2156 | /* rndi = 1/rnd mod n */
|
---|
2157 | if (ret == 0 && mp_invmod(rnd, &key->n, rndi) != MP_OKAY)
|
---|
2158 | ret = MP_INVMOD_E;
|
---|
2159 |
|
---|
2160 | /* rnd = rnd^e */
|
---|
2161 | if (ret == 0 && mp_exptmod(rnd, &key->e, &key->n, rnd) != MP_OKAY)
|
---|
2162 | ret = MP_EXPTMOD_E;
|
---|
2163 |
|
---|
2164 | /* tmp = tmp*rnd mod n */
|
---|
2165 | if (ret == 0 && mp_mulmod(tmp, rnd, &key->n, tmp) != MP_OKAY)
|
---|
2166 | ret = MP_MULMOD_E;
|
---|
2167 | #endif /* WC_RSA_BLINDING && !WC_NO_RNG */
|
---|
2168 |
|
---|
2169 | #ifdef RSA_LOW_MEM /* half as much memory but twice as slow */
|
---|
2170 | if (ret == 0 && mp_exptmod(tmp, &key->d, &key->n, tmp) != MP_OKAY)
|
---|
2171 | ret = MP_EXPTMOD_E;
|
---|
2172 | #else
|
---|
2173 | if (ret == 0) {
|
---|
2174 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2175 | mp_int* tmpa;
|
---|
2176 | mp_int* tmpb = NULL;
|
---|
2177 | #else
|
---|
2178 | mp_int tmpa[1], tmpb[1];
|
---|
2179 | #endif
|
---|
2180 | int cleara = 0, clearb = 0;
|
---|
2181 |
|
---|
2182 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2183 | tmpa = (mp_int*)XMALLOC(sizeof(mp_int) * 2,
|
---|
2184 | key->heap, DYNAMIC_TYPE_RSA);
|
---|
2185 | if (tmpa != NULL)
|
---|
2186 | tmpb = tmpa + 1;
|
---|
2187 | else
|
---|
2188 | ret = MEMORY_E;
|
---|
2189 | #endif
|
---|
2190 |
|
---|
2191 | if (ret == 0) {
|
---|
2192 | if (mp_init(tmpa) != MP_OKAY)
|
---|
2193 | ret = MP_INIT_E;
|
---|
2194 | else
|
---|
2195 | cleara = 1;
|
---|
2196 | }
|
---|
2197 |
|
---|
2198 | if (ret == 0) {
|
---|
2199 | if (mp_init(tmpb) != MP_OKAY)
|
---|
2200 | ret = MP_INIT_E;
|
---|
2201 | else
|
---|
2202 | clearb = 1;
|
---|
2203 | }
|
---|
2204 |
|
---|
2205 | /* tmpa = tmp^dP mod p */
|
---|
2206 | if (ret == 0 && mp_exptmod(tmp, &key->dP, &key->p,
|
---|
2207 | tmpa) != MP_OKAY)
|
---|
2208 | ret = MP_EXPTMOD_E;
|
---|
2209 |
|
---|
2210 | /* tmpb = tmp^dQ mod q */
|
---|
2211 | if (ret == 0 && mp_exptmod(tmp, &key->dQ, &key->q,
|
---|
2212 | tmpb) != MP_OKAY)
|
---|
2213 | ret = MP_EXPTMOD_E;
|
---|
2214 |
|
---|
2215 | /* tmp = (tmpa - tmpb) * qInv (mod p) */
|
---|
2216 | if (ret == 0 && mp_sub(tmpa, tmpb, tmp) != MP_OKAY)
|
---|
2217 | ret = MP_SUB_E;
|
---|
2218 |
|
---|
2219 | if (ret == 0 && mp_mulmod(tmp, &key->u, &key->p,
|
---|
2220 | tmp) != MP_OKAY)
|
---|
2221 | ret = MP_MULMOD_E;
|
---|
2222 |
|
---|
2223 | /* tmp = tmpb + q * tmp */
|
---|
2224 | if (ret == 0 && mp_mul(tmp, &key->q, tmp) != MP_OKAY)
|
---|
2225 | ret = MP_MUL_E;
|
---|
2226 |
|
---|
2227 | if (ret == 0 && mp_add(tmp, tmpb, tmp) != MP_OKAY)
|
---|
2228 | ret = MP_ADD_E;
|
---|
2229 |
|
---|
2230 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2231 | if (tmpa != NULL)
|
---|
2232 | #endif
|
---|
2233 | {
|
---|
2234 | if (cleara)
|
---|
2235 | mp_clear(tmpa);
|
---|
2236 | if (clearb)
|
---|
2237 | mp_clear(tmpb);
|
---|
2238 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2239 | XFREE(tmpa, key->heap, DYNAMIC_TYPE_RSA);
|
---|
2240 | #endif
|
---|
2241 | }
|
---|
2242 | } /* tmpa/b scope */
|
---|
2243 | #endif /* RSA_LOW_MEM */
|
---|
2244 |
|
---|
2245 | #ifdef WC_RSA_BLINDING
|
---|
2246 | /* unblind */
|
---|
2247 | if (ret == 0 && mp_mulmod(tmp, rndi, &key->n, tmp) != MP_OKAY)
|
---|
2248 | ret = MP_MULMOD_E;
|
---|
2249 | #endif /* WC_RSA_BLINDING */
|
---|
2250 |
|
---|
2251 | break;
|
---|
2252 | }
|
---|
2253 | #endif
|
---|
2254 | case RSA_PUBLIC_ENCRYPT:
|
---|
2255 | case RSA_PUBLIC_DECRYPT:
|
---|
2256 | #ifdef WOLFSSL_XILINX_CRYPT
|
---|
2257 | ret = wc_RsaFunctionXil(in, inLen, out, outLen, type, key, rng);
|
---|
2258 | #else
|
---|
2259 | if (mp_exptmod_nct(tmp, &key->e, &key->n, tmp) != MP_OKAY)
|
---|
2260 | ret = MP_EXPTMOD_E;
|
---|
2261 | #endif
|
---|
2262 | break;
|
---|
2263 | default:
|
---|
2264 | ret = RSA_WRONG_TYPE_E;
|
---|
2265 | break;
|
---|
2266 | }
|
---|
2267 | }
|
---|
2268 |
|
---|
2269 | if (ret == 0) {
|
---|
2270 | keyLen = wc_RsaEncryptSize(key);
|
---|
2271 | if (keyLen > *outLen)
|
---|
2272 | ret = RSA_BUFFER_E;
|
---|
2273 | }
|
---|
2274 | if (ret == 0) {
|
---|
2275 | *outLen = keyLen;
|
---|
2276 | if (mp_to_unsigned_bin_len(tmp, out, keyLen) != MP_OKAY)
|
---|
2277 | ret = MP_TO_E;
|
---|
2278 | }
|
---|
2279 | #else
|
---|
2280 | (void)type;
|
---|
2281 | (void)key;
|
---|
2282 | (void)keyLen;
|
---|
2283 | XMEMCPY(out, in, inLen);
|
---|
2284 | *outLen = inLen;
|
---|
2285 | #endif
|
---|
2286 |
|
---|
2287 | mp_clear(tmp);
|
---|
2288 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2289 | XFREE(tmp, key->heap, DYNAMIC_TYPE_RSA);
|
---|
2290 | #endif
|
---|
2291 | #ifdef WC_RSA_BLINDING
|
---|
2292 | if (type == RSA_PRIVATE_DECRYPT || type == RSA_PRIVATE_ENCRYPT) {
|
---|
2293 | mp_clear(rndi);
|
---|
2294 | mp_clear(rnd);
|
---|
2295 | }
|
---|
2296 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2297 | XFREE(rnd, key->heap, DYNAMIC_TYPE_RSA);
|
---|
2298 | #endif
|
---|
2299 | #endif /* WC_RSA_BLINDING */
|
---|
2300 | return ret;
|
---|
2301 | #endif /* WOLFSSL_SP_MATH */
|
---|
2302 | }
|
---|
2303 | #endif
|
---|
2304 |
|
---|
2305 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA)
|
---|
2306 | static int wc_RsaFunctionAsync(const byte* in, word32 inLen, byte* out,
|
---|
2307 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
2308 | {
|
---|
2309 | int ret = 0;
|
---|
2310 |
|
---|
2311 | (void)rng;
|
---|
2312 |
|
---|
2313 | #ifdef WOLFSSL_ASYNC_CRYPT_TEST
|
---|
2314 | if (wc_AsyncTestInit(&key->asyncDev, ASYNC_TEST_RSA_FUNC)) {
|
---|
2315 | WC_ASYNC_TEST* testDev = &key->asyncDev.test;
|
---|
2316 | testDev->rsaFunc.in = in;
|
---|
2317 | testDev->rsaFunc.inSz = inLen;
|
---|
2318 | testDev->rsaFunc.out = out;
|
---|
2319 | testDev->rsaFunc.outSz = outLen;
|
---|
2320 | testDev->rsaFunc.type = type;
|
---|
2321 | testDev->rsaFunc.key = key;
|
---|
2322 | testDev->rsaFunc.rng = rng;
|
---|
2323 | return WC_PENDING_E;
|
---|
2324 | }
|
---|
2325 | #endif /* WOLFSSL_ASYNC_CRYPT_TEST */
|
---|
2326 |
|
---|
2327 | switch(type) {
|
---|
2328 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
2329 | case RSA_PRIVATE_DECRYPT:
|
---|
2330 | case RSA_PRIVATE_ENCRYPT:
|
---|
2331 | #ifdef HAVE_CAVIUM
|
---|
2332 | key->dataLen = key->n.raw.len;
|
---|
2333 | ret = NitroxRsaExptMod(in, inLen,
|
---|
2334 | key->d.raw.buf, key->d.raw.len,
|
---|
2335 | key->n.raw.buf, key->n.raw.len,
|
---|
2336 | out, outLen, key);
|
---|
2337 | #elif defined(HAVE_INTEL_QA)
|
---|
2338 | #ifdef RSA_LOW_MEM
|
---|
2339 | ret = IntelQaRsaPrivate(&key->asyncDev, in, inLen,
|
---|
2340 | &key->d.raw, &key->n.raw,
|
---|
2341 | out, outLen);
|
---|
2342 | #else
|
---|
2343 | ret = IntelQaRsaCrtPrivate(&key->asyncDev, in, inLen,
|
---|
2344 | &key->p.raw, &key->q.raw,
|
---|
2345 | &key->dP.raw, &key->dQ.raw,
|
---|
2346 | &key->u.raw,
|
---|
2347 | out, outLen);
|
---|
2348 | #endif
|
---|
2349 | #else /* WOLFSSL_ASYNC_CRYPT_TEST */
|
---|
2350 | ret = wc_RsaFunctionSync(in, inLen, out, outLen, type, key, rng);
|
---|
2351 | #endif
|
---|
2352 | break;
|
---|
2353 | #endif
|
---|
2354 |
|
---|
2355 | case RSA_PUBLIC_ENCRYPT:
|
---|
2356 | case RSA_PUBLIC_DECRYPT:
|
---|
2357 | #ifdef HAVE_CAVIUM
|
---|
2358 | key->dataLen = key->n.raw.len;
|
---|
2359 | ret = NitroxRsaExptMod(in, inLen,
|
---|
2360 | key->e.raw.buf, key->e.raw.len,
|
---|
2361 | key->n.raw.buf, key->n.raw.len,
|
---|
2362 | out, outLen, key);
|
---|
2363 | #elif defined(HAVE_INTEL_QA)
|
---|
2364 | ret = IntelQaRsaPublic(&key->asyncDev, in, inLen,
|
---|
2365 | &key->e.raw, &key->n.raw,
|
---|
2366 | out, outLen);
|
---|
2367 | #else /* WOLFSSL_ASYNC_CRYPT_TEST */
|
---|
2368 | ret = wc_RsaFunctionSync(in, inLen, out, outLen, type, key, rng);
|
---|
2369 | #endif
|
---|
2370 | break;
|
---|
2371 |
|
---|
2372 | default:
|
---|
2373 | ret = RSA_WRONG_TYPE_E;
|
---|
2374 | }
|
---|
2375 |
|
---|
2376 | return ret;
|
---|
2377 | }
|
---|
2378 | #endif /* WOLFSSL_ASYNC_CRYPT && WC_ASYNC_ENABLE_RSA */
|
---|
2379 |
|
---|
2380 | #if defined(WC_RSA_DIRECT) || defined(WC_RSA_NO_PADDING)
|
---|
2381 | /* Function that does the RSA operation directly with no padding.
|
---|
2382 | *
|
---|
2383 | * in buffer to do operation on
|
---|
2384 | * inLen length of input buffer
|
---|
2385 | * out buffer to hold results
|
---|
2386 | * outSz gets set to size of result buffer. Should be passed in as length
|
---|
2387 | * of out buffer. If the pointer "out" is null then outSz gets set to
|
---|
2388 | * the expected buffer size needed and LENGTH_ONLY_E gets returned.
|
---|
2389 | * key RSA key to use for encrypt/decrypt
|
---|
2390 | * type if using private or public key {RSA_PUBLIC_ENCRYPT,
|
---|
2391 | * RSA_PUBLIC_DECRYPT, RSA_PRIVATE_ENCRYPT, RSA_PRIVATE_DECRYPT}
|
---|
2392 | * rng wolfSSL RNG to use if needed
|
---|
2393 | *
|
---|
2394 | * returns size of result on success
|
---|
2395 | */
|
---|
2396 | int wc_RsaDirect(byte* in, word32 inLen, byte* out, word32* outSz,
|
---|
2397 | RsaKey* key, int type, WC_RNG* rng)
|
---|
2398 | {
|
---|
2399 | int ret;
|
---|
2400 |
|
---|
2401 | if (in == NULL || outSz == NULL || key == NULL) {
|
---|
2402 | return BAD_FUNC_ARG;
|
---|
2403 | }
|
---|
2404 |
|
---|
2405 | /* sanity check on type of RSA operation */
|
---|
2406 | switch (type) {
|
---|
2407 | case RSA_PUBLIC_ENCRYPT:
|
---|
2408 | case RSA_PUBLIC_DECRYPT:
|
---|
2409 | case RSA_PRIVATE_ENCRYPT:
|
---|
2410 | case RSA_PRIVATE_DECRYPT:
|
---|
2411 | break;
|
---|
2412 | default:
|
---|
2413 | WOLFSSL_MSG("Bad RSA type");
|
---|
2414 | return BAD_FUNC_ARG;
|
---|
2415 | }
|
---|
2416 |
|
---|
2417 | if ((ret = wc_RsaEncryptSize(key)) < 0) {
|
---|
2418 | return BAD_FUNC_ARG;
|
---|
2419 | }
|
---|
2420 |
|
---|
2421 | if (inLen != (word32)ret) {
|
---|
2422 | WOLFSSL_MSG("Bad input length. Should be RSA key size");
|
---|
2423 | return BAD_FUNC_ARG;
|
---|
2424 | }
|
---|
2425 |
|
---|
2426 | if (out == NULL) {
|
---|
2427 | *outSz = inLen;
|
---|
2428 | return LENGTH_ONLY_E;
|
---|
2429 | }
|
---|
2430 |
|
---|
2431 | switch (key->state) {
|
---|
2432 | case RSA_STATE_NONE:
|
---|
2433 | case RSA_STATE_ENCRYPT_PAD:
|
---|
2434 | case RSA_STATE_ENCRYPT_EXPTMOD:
|
---|
2435 | case RSA_STATE_DECRYPT_EXPTMOD:
|
---|
2436 | case RSA_STATE_DECRYPT_UNPAD:
|
---|
2437 | key->state = (type == RSA_PRIVATE_ENCRYPT ||
|
---|
2438 | type == RSA_PUBLIC_ENCRYPT) ? RSA_STATE_ENCRYPT_EXPTMOD:
|
---|
2439 | RSA_STATE_DECRYPT_EXPTMOD;
|
---|
2440 |
|
---|
2441 | key->dataLen = *outSz;
|
---|
2442 |
|
---|
2443 | ret = wc_RsaFunction(in, inLen, out, &key->dataLen, type, key, rng);
|
---|
2444 | if (ret >= 0 || ret == WC_PENDING_E) {
|
---|
2445 | key->state = (type == RSA_PRIVATE_ENCRYPT ||
|
---|
2446 | type == RSA_PUBLIC_ENCRYPT) ? RSA_STATE_ENCRYPT_RES:
|
---|
2447 | RSA_STATE_DECRYPT_RES;
|
---|
2448 | }
|
---|
2449 | if (ret < 0) {
|
---|
2450 | break;
|
---|
2451 | }
|
---|
2452 |
|
---|
2453 | FALL_THROUGH;
|
---|
2454 |
|
---|
2455 | case RSA_STATE_ENCRYPT_RES:
|
---|
2456 | case RSA_STATE_DECRYPT_RES:
|
---|
2457 | ret = key->dataLen;
|
---|
2458 | break;
|
---|
2459 |
|
---|
2460 | default:
|
---|
2461 | ret = BAD_STATE_E;
|
---|
2462 | }
|
---|
2463 |
|
---|
2464 | /* if async pending then skip cleanup*/
|
---|
2465 | if (ret == WC_PENDING_E
|
---|
2466 | #ifdef WC_RSA_NONBLOCK
|
---|
2467 | || ret == FP_WOULDBLOCK
|
---|
2468 | #endif
|
---|
2469 | ) {
|
---|
2470 | return ret;
|
---|
2471 | }
|
---|
2472 |
|
---|
2473 | key->state = RSA_STATE_NONE;
|
---|
2474 | wc_RsaCleanup(key);
|
---|
2475 |
|
---|
2476 | return ret;
|
---|
2477 | }
|
---|
2478 | #endif /* WC_RSA_DIRECT || WC_RSA_NO_PADDING */
|
---|
2479 |
|
---|
2480 | #if defined(WOLFSSL_CRYPTOCELL)
|
---|
2481 | static int cc310_RsaPublicEncrypt(const byte* in, word32 inLen, byte* out,
|
---|
2482 | word32 outLen, RsaKey* key)
|
---|
2483 | {
|
---|
2484 | CRYSError_t ret = 0;
|
---|
2485 | CRYS_RSAPrimeData_t primeData;
|
---|
2486 | int modulusSize = wc_RsaEncryptSize(key);
|
---|
2487 |
|
---|
2488 | /* The out buffer must be at least modulus size bytes long. */
|
---|
2489 | if (outLen < modulusSize)
|
---|
2490 | return BAD_FUNC_ARG;
|
---|
2491 |
|
---|
2492 | ret = CRYS_RSA_PKCS1v15_Encrypt(&wc_rndState,
|
---|
2493 | wc_rndGenVectFunc,
|
---|
2494 | &key->ctx.pubKey,
|
---|
2495 | &primeData,
|
---|
2496 | (byte*)in,
|
---|
2497 | inLen,
|
---|
2498 | out);
|
---|
2499 |
|
---|
2500 | if (ret != SA_SILIB_RET_OK){
|
---|
2501 | WOLFSSL_MSG("CRYS_RSA_PKCS1v15_Encrypt failed");
|
---|
2502 | return -1;
|
---|
2503 | }
|
---|
2504 |
|
---|
2505 | return modulusSize;
|
---|
2506 | }
|
---|
2507 | static int cc310_RsaPublicDecrypt(const byte* in, word32 inLen, byte* out,
|
---|
2508 | word32 outLen, RsaKey* key)
|
---|
2509 | {
|
---|
2510 | CRYSError_t ret = 0;
|
---|
2511 | CRYS_RSAPrimeData_t primeData;
|
---|
2512 | uint16_t actualOutLen = outLen;
|
---|
2513 |
|
---|
2514 | ret = CRYS_RSA_PKCS1v15_Decrypt(&key->ctx.privKey,
|
---|
2515 | &primeData,
|
---|
2516 | (byte*)in,
|
---|
2517 | inLen,
|
---|
2518 | out,
|
---|
2519 | &actualOutLen);
|
---|
2520 |
|
---|
2521 | if (ret != SA_SILIB_RET_OK){
|
---|
2522 | WOLFSSL_MSG("CRYS_RSA_PKCS1v15_Decrypt failed");
|
---|
2523 | return -1;
|
---|
2524 | }
|
---|
2525 | return actualOutLen;
|
---|
2526 | }
|
---|
2527 |
|
---|
2528 | int cc310_RsaSSL_Sign(const byte* in, word32 inLen, byte* out,
|
---|
2529 | word32 outLen, RsaKey* key, CRYS_RSA_HASH_OpMode_t mode)
|
---|
2530 | {
|
---|
2531 | CRYSError_t ret = 0;
|
---|
2532 | uint16_t actualOutLen = outLen*sizeof(byte);
|
---|
2533 | CRYS_RSAPrivUserContext_t contextPrivate;
|
---|
2534 |
|
---|
2535 | ret = CRYS_RSA_PKCS1v15_Sign(&wc_rndState,
|
---|
2536 | wc_rndGenVectFunc,
|
---|
2537 | &contextPrivate,
|
---|
2538 | &key->ctx.privKey,
|
---|
2539 | mode,
|
---|
2540 | (byte*)in,
|
---|
2541 | inLen,
|
---|
2542 | out,
|
---|
2543 | &actualOutLen);
|
---|
2544 |
|
---|
2545 | if (ret != SA_SILIB_RET_OK){
|
---|
2546 | WOLFSSL_MSG("CRYS_RSA_PKCS1v15_Sign failed");
|
---|
2547 | return -1;
|
---|
2548 | }
|
---|
2549 | return actualOutLen;
|
---|
2550 | }
|
---|
2551 |
|
---|
2552 | int cc310_RsaSSL_Verify(const byte* in, word32 inLen, byte* sig,
|
---|
2553 | RsaKey* key, CRYS_RSA_HASH_OpMode_t mode)
|
---|
2554 | {
|
---|
2555 | CRYSError_t ret = 0;
|
---|
2556 | CRYS_RSAPubUserContext_t contextPub;
|
---|
2557 |
|
---|
2558 | /* verify the signature in the sig pointer */
|
---|
2559 | ret = CRYS_RSA_PKCS1v15_Verify(&contextPub,
|
---|
2560 | &key->ctx.pubKey,
|
---|
2561 | mode,
|
---|
2562 | (byte*)in,
|
---|
2563 | inLen,
|
---|
2564 | sig);
|
---|
2565 |
|
---|
2566 | if (ret != SA_SILIB_RET_OK){
|
---|
2567 | WOLFSSL_MSG("CRYS_RSA_PKCS1v15_Verify failed");
|
---|
2568 | return -1;
|
---|
2569 | }
|
---|
2570 |
|
---|
2571 | return ret;
|
---|
2572 | }
|
---|
2573 | #endif /* WOLFSSL_CRYPTOCELL */
|
---|
2574 |
|
---|
2575 | int wc_RsaFunction(const byte* in, word32 inLen, byte* out,
|
---|
2576 | word32* outLen, int type, RsaKey* key, WC_RNG* rng)
|
---|
2577 | {
|
---|
2578 | int ret = 0;
|
---|
2579 |
|
---|
2580 | if (key == NULL || in == NULL || inLen == 0 || out == NULL ||
|
---|
2581 | outLen == NULL || *outLen == 0 || type == RSA_TYPE_UNKNOWN) {
|
---|
2582 | return BAD_FUNC_ARG;
|
---|
2583 | }
|
---|
2584 |
|
---|
2585 | #ifdef WOLF_CRYPTO_CB
|
---|
2586 | if (key->devId != INVALID_DEVID) {
|
---|
2587 | ret = wc_CryptoCb_Rsa(in, inLen, out, outLen, type, key, rng);
|
---|
2588 | if (ret != CRYPTOCB_UNAVAILABLE)
|
---|
2589 | return ret;
|
---|
2590 | /* fall-through when unavailable */
|
---|
2591 | ret = 0; /* reset error code and try using software */
|
---|
2592 | }
|
---|
2593 | #endif
|
---|
2594 |
|
---|
2595 | #ifndef TEST_UNPAD_CONSTANT_TIME
|
---|
2596 | #ifndef NO_RSA_BOUNDS_CHECK
|
---|
2597 | if (type == RSA_PRIVATE_DECRYPT &&
|
---|
2598 | key->state == RSA_STATE_DECRYPT_EXPTMOD) {
|
---|
2599 |
|
---|
2600 | /* Check that 1 < in < n-1. (Requirement of 800-56B.) */
|
---|
2601 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2602 | mp_int* c;
|
---|
2603 | #else
|
---|
2604 | mp_int c[1];
|
---|
2605 | #endif
|
---|
2606 |
|
---|
2607 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2608 | c = (mp_int*)XMALLOC(sizeof(mp_int), key->heap, DYNAMIC_TYPE_RSA);
|
---|
2609 | if (c == NULL)
|
---|
2610 | ret = MEMORY_E;
|
---|
2611 | #endif
|
---|
2612 |
|
---|
2613 | if (mp_init(c) != MP_OKAY)
|
---|
2614 | ret = MEMORY_E;
|
---|
2615 | if (ret == 0) {
|
---|
2616 | if (mp_read_unsigned_bin(c, in, inLen) != 0)
|
---|
2617 | ret = MP_READ_E;
|
---|
2618 | }
|
---|
2619 | if (ret == 0) {
|
---|
2620 | /* check c > 1 */
|
---|
2621 | if (mp_cmp_d(c, 1) != MP_GT)
|
---|
2622 | ret = RSA_OUT_OF_RANGE_E;
|
---|
2623 | }
|
---|
2624 | if (ret == 0) {
|
---|
2625 | /* add c+1 */
|
---|
2626 | if (mp_add_d(c, 1, c) != MP_OKAY)
|
---|
2627 | ret = MP_ADD_E;
|
---|
2628 | }
|
---|
2629 | if (ret == 0) {
|
---|
2630 | /* check c+1 < n */
|
---|
2631 | if (mp_cmp(c, &key->n) != MP_LT)
|
---|
2632 | ret = RSA_OUT_OF_RANGE_E;
|
---|
2633 | }
|
---|
2634 | mp_clear(c);
|
---|
2635 |
|
---|
2636 | #ifdef WOLFSSL_SMALL_STACK
|
---|
2637 | XFREE(c, key->heap, DYNAMIC_TYPE_RSA);
|
---|
2638 | #endif
|
---|
2639 |
|
---|
2640 | if (ret != 0)
|
---|
2641 | return ret;
|
---|
2642 | }
|
---|
2643 | #endif /* NO_RSA_BOUNDS_CHECK */
|
---|
2644 | #endif
|
---|
2645 |
|
---|
2646 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA)
|
---|
2647 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA &&
|
---|
2648 | key->n.raw.len > 0) {
|
---|
2649 | ret = wc_RsaFunctionAsync(in, inLen, out, outLen, type, key, rng);
|
---|
2650 | }
|
---|
2651 | else
|
---|
2652 | #endif
|
---|
2653 | #ifdef WC_RSA_NONBLOCK
|
---|
2654 | if (key->nb) {
|
---|
2655 | ret = wc_RsaFunctionNonBlock(in, inLen, out, outLen, type, key);
|
---|
2656 | }
|
---|
2657 | else
|
---|
2658 | #endif
|
---|
2659 | {
|
---|
2660 | ret = wc_RsaFunctionSync(in, inLen, out, outLen, type, key, rng);
|
---|
2661 | }
|
---|
2662 |
|
---|
2663 | /* handle error */
|
---|
2664 | if (ret < 0 && ret != WC_PENDING_E
|
---|
2665 | #ifdef WC_RSA_NONBLOCK
|
---|
2666 | && ret != FP_WOULDBLOCK
|
---|
2667 | #endif
|
---|
2668 | ) {
|
---|
2669 | if (ret == MP_EXPTMOD_E) {
|
---|
2670 | /* This can happen due to incorrectly set FP_MAX_BITS or missing XREALLOC */
|
---|
2671 | WOLFSSL_MSG("RSA_FUNCTION MP_EXPTMOD_E: memory/config problem");
|
---|
2672 | }
|
---|
2673 |
|
---|
2674 | key->state = RSA_STATE_NONE;
|
---|
2675 | wc_RsaCleanup(key);
|
---|
2676 | }
|
---|
2677 |
|
---|
2678 | return ret;
|
---|
2679 | }
|
---|
2680 |
|
---|
2681 |
|
---|
2682 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
2683 | /* Internal Wrappers */
|
---|
2684 | /* Gives the option of choosing padding type
|
---|
2685 | in : input to be encrypted
|
---|
2686 | inLen: length of input buffer
|
---|
2687 | out: encrypted output
|
---|
2688 | outLen: length of encrypted output buffer
|
---|
2689 | key : wolfSSL initialized RSA key struct
|
---|
2690 | rng : wolfSSL initialized random number struct
|
---|
2691 | rsa_type : type of RSA: RSA_PUBLIC_ENCRYPT, RSA_PUBLIC_DECRYPT,
|
---|
2692 | RSA_PRIVATE_ENCRYPT or RSA_PRIVATE_DECRYPT
|
---|
2693 | pad_value: RSA_BLOCK_TYPE_1 or RSA_BLOCK_TYPE_2
|
---|
2694 | pad_type : type of padding: WC_RSA_PKCSV15_PAD, WC_RSA_OAEP_PAD,
|
---|
2695 | WC_RSA_NO_PAD or WC_RSA_PSS_PAD
|
---|
2696 | hash : type of hash algorithm to use found in wolfssl/wolfcrypt/hash.h
|
---|
2697 | mgf : type of mask generation function to use
|
---|
2698 | label : optional label
|
---|
2699 | labelSz : size of optional label buffer
|
---|
2700 | saltLen : Length of salt used in PSS
|
---|
2701 | rng : random number generator */
|
---|
2702 | static int RsaPublicEncryptEx(const byte* in, word32 inLen, byte* out,
|
---|
2703 | word32 outLen, RsaKey* key, int rsa_type,
|
---|
2704 | byte pad_value, int pad_type,
|
---|
2705 | enum wc_HashType hash, int mgf,
|
---|
2706 | byte* label, word32 labelSz, int saltLen,
|
---|
2707 | WC_RNG* rng)
|
---|
2708 | {
|
---|
2709 | int ret, sz;
|
---|
2710 |
|
---|
2711 | if (in == NULL || inLen == 0 || out == NULL || key == NULL) {
|
---|
2712 | return BAD_FUNC_ARG;
|
---|
2713 | }
|
---|
2714 |
|
---|
2715 | sz = wc_RsaEncryptSize(key);
|
---|
2716 | if (sz > (int)outLen) {
|
---|
2717 | return RSA_BUFFER_E;
|
---|
2718 | }
|
---|
2719 |
|
---|
2720 | if (sz < RSA_MIN_PAD_SZ) {
|
---|
2721 | return WC_KEY_SIZE_E;
|
---|
2722 | }
|
---|
2723 |
|
---|
2724 | if (inLen > (word32)(sz - RSA_MIN_PAD_SZ)) {
|
---|
2725 | #ifdef WC_RSA_NO_PADDING
|
---|
2726 | /* In the case that no padding is used the input length can and should
|
---|
2727 | * be the same size as the RSA key. */
|
---|
2728 | if (pad_type != WC_RSA_NO_PAD)
|
---|
2729 | #endif
|
---|
2730 | return RSA_BUFFER_E;
|
---|
2731 | }
|
---|
2732 |
|
---|
2733 | switch (key->state) {
|
---|
2734 | case RSA_STATE_NONE:
|
---|
2735 | case RSA_STATE_ENCRYPT_PAD:
|
---|
2736 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
2737 | defined(HAVE_CAVIUM)
|
---|
2738 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA &&
|
---|
2739 | pad_type != WC_RSA_PSS_PAD && key->n.raw.buf) {
|
---|
2740 | /* Async operations that include padding */
|
---|
2741 | if (rsa_type == RSA_PUBLIC_ENCRYPT &&
|
---|
2742 | pad_value == RSA_BLOCK_TYPE_2) {
|
---|
2743 | key->state = RSA_STATE_ENCRYPT_RES;
|
---|
2744 | key->dataLen = key->n.raw.len;
|
---|
2745 | return NitroxRsaPublicEncrypt(in, inLen, out, outLen, key);
|
---|
2746 | }
|
---|
2747 | else if (rsa_type == RSA_PRIVATE_ENCRYPT &&
|
---|
2748 | pad_value == RSA_BLOCK_TYPE_1) {
|
---|
2749 | key->state = RSA_STATE_ENCRYPT_RES;
|
---|
2750 | key->dataLen = key->n.raw.len;
|
---|
2751 | return NitroxRsaSSL_Sign(in, inLen, out, outLen, key);
|
---|
2752 | }
|
---|
2753 | }
|
---|
2754 | #elif defined(WOLFSSL_CRYPTOCELL)
|
---|
2755 | if (rsa_type == RSA_PUBLIC_ENCRYPT &&
|
---|
2756 | pad_value == RSA_BLOCK_TYPE_2) {
|
---|
2757 |
|
---|
2758 | return cc310_RsaPublicEncrypt(in, inLen, out, outLen, key);
|
---|
2759 | }
|
---|
2760 | else if (rsa_type == RSA_PRIVATE_ENCRYPT &&
|
---|
2761 | pad_value == RSA_BLOCK_TYPE_1) {
|
---|
2762 | return cc310_RsaSSL_Sign(in, inLen, out, outLen, key,
|
---|
2763 | cc310_hashModeRSA(hash, 0));
|
---|
2764 | }
|
---|
2765 | #endif /* WOLFSSL_CRYPTOCELL */
|
---|
2766 |
|
---|
2767 | key->state = RSA_STATE_ENCRYPT_PAD;
|
---|
2768 | ret = wc_RsaPad_ex(in, inLen, out, sz, pad_value, rng, pad_type, hash,
|
---|
2769 | mgf, label, labelSz, saltLen, mp_count_bits(&key->n),
|
---|
2770 | key->heap);
|
---|
2771 | if (ret < 0) {
|
---|
2772 | break;
|
---|
2773 | }
|
---|
2774 |
|
---|
2775 | key->state = RSA_STATE_ENCRYPT_EXPTMOD;
|
---|
2776 | FALL_THROUGH;
|
---|
2777 |
|
---|
2778 | case RSA_STATE_ENCRYPT_EXPTMOD:
|
---|
2779 |
|
---|
2780 | key->dataLen = outLen;
|
---|
2781 | ret = wc_RsaFunction(out, sz, out, &key->dataLen, rsa_type, key, rng);
|
---|
2782 |
|
---|
2783 | if (ret >= 0 || ret == WC_PENDING_E) {
|
---|
2784 | key->state = RSA_STATE_ENCRYPT_RES;
|
---|
2785 | }
|
---|
2786 | if (ret < 0) {
|
---|
2787 | break;
|
---|
2788 | }
|
---|
2789 |
|
---|
2790 | FALL_THROUGH;
|
---|
2791 |
|
---|
2792 | case RSA_STATE_ENCRYPT_RES:
|
---|
2793 | ret = key->dataLen;
|
---|
2794 | break;
|
---|
2795 |
|
---|
2796 | default:
|
---|
2797 | ret = BAD_STATE_E;
|
---|
2798 | break;
|
---|
2799 | }
|
---|
2800 |
|
---|
2801 | /* if async pending then return and skip done cleanup below */
|
---|
2802 | if (ret == WC_PENDING_E
|
---|
2803 | #ifdef WC_RSA_NONBLOCK
|
---|
2804 | || ret == FP_WOULDBLOCK
|
---|
2805 | #endif
|
---|
2806 | ) {
|
---|
2807 | return ret;
|
---|
2808 | }
|
---|
2809 |
|
---|
2810 | key->state = RSA_STATE_NONE;
|
---|
2811 | wc_RsaCleanup(key);
|
---|
2812 |
|
---|
2813 | return ret;
|
---|
2814 | }
|
---|
2815 |
|
---|
2816 | #endif
|
---|
2817 |
|
---|
2818 | /* Gives the option of choosing padding type
|
---|
2819 | in : input to be decrypted
|
---|
2820 | inLen: length of input buffer
|
---|
2821 | out: decrypted message
|
---|
2822 | outLen: length of decrypted message in bytes
|
---|
2823 | outPtr: optional inline output pointer (if provided doing inline)
|
---|
2824 | key : wolfSSL initialized RSA key struct
|
---|
2825 | rsa_type : type of RSA: RSA_PUBLIC_ENCRYPT, RSA_PUBLIC_DECRYPT,
|
---|
2826 | RSA_PRIVATE_ENCRYPT or RSA_PRIVATE_DECRYPT
|
---|
2827 | pad_value: RSA_BLOCK_TYPE_1 or RSA_BLOCK_TYPE_2
|
---|
2828 | pad_type : type of padding: WC_RSA_PKCSV15_PAD, WC_RSA_OAEP_PAD,
|
---|
2829 | WC_RSA_NO_PAD, WC_RSA_PSS_PAD
|
---|
2830 | hash : type of hash algorithm to use found in wolfssl/wolfcrypt/hash.h
|
---|
2831 | mgf : type of mask generation function to use
|
---|
2832 | label : optional label
|
---|
2833 | labelSz : size of optional label buffer
|
---|
2834 | saltLen : Length of salt used in PSS
|
---|
2835 | rng : random number generator */
|
---|
2836 | static int RsaPrivateDecryptEx(byte* in, word32 inLen, byte* out,
|
---|
2837 | word32 outLen, byte** outPtr, RsaKey* key,
|
---|
2838 | int rsa_type, byte pad_value, int pad_type,
|
---|
2839 | enum wc_HashType hash, int mgf,
|
---|
2840 | byte* label, word32 labelSz, int saltLen,
|
---|
2841 | WC_RNG* rng)
|
---|
2842 | {
|
---|
2843 | int ret = RSA_WRONG_TYPE_E;
|
---|
2844 | byte* pad = NULL;
|
---|
2845 |
|
---|
2846 | if (in == NULL || inLen == 0 || out == NULL || key == NULL) {
|
---|
2847 | return BAD_FUNC_ARG;
|
---|
2848 | }
|
---|
2849 |
|
---|
2850 | switch (key->state) {
|
---|
2851 | case RSA_STATE_NONE:
|
---|
2852 | key->dataLen = inLen;
|
---|
2853 |
|
---|
2854 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
2855 | defined(HAVE_CAVIUM)
|
---|
2856 | /* Async operations that include padding */
|
---|
2857 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA &&
|
---|
2858 | pad_type != WC_RSA_PSS_PAD) {
|
---|
2859 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
2860 | if (rsa_type == RSA_PRIVATE_DECRYPT &&
|
---|
2861 | pad_value == RSA_BLOCK_TYPE_2) {
|
---|
2862 | key->state = RSA_STATE_DECRYPT_RES;
|
---|
2863 | key->data = NULL;
|
---|
2864 | return NitroxRsaPrivateDecrypt(in, inLen, out, &key->dataLen,
|
---|
2865 | key);
|
---|
2866 | #endif
|
---|
2867 | }
|
---|
2868 | else if (rsa_type == RSA_PUBLIC_DECRYPT &&
|
---|
2869 | pad_value == RSA_BLOCK_TYPE_1) {
|
---|
2870 | key->state = RSA_STATE_DECRYPT_RES;
|
---|
2871 | key->data = NULL;
|
---|
2872 | return NitroxRsaSSL_Verify(in, inLen, out, &key->dataLen, key);
|
---|
2873 | }
|
---|
2874 | }
|
---|
2875 | #elif defined(WOLFSSL_CRYPTOCELL)
|
---|
2876 | if (rsa_type == RSA_PRIVATE_DECRYPT &&
|
---|
2877 | pad_value == RSA_BLOCK_TYPE_2) {
|
---|
2878 | ret = cc310_RsaPublicDecrypt(in, inLen, out, outLen, key);
|
---|
2879 | if (outPtr != NULL)
|
---|
2880 | *outPtr = out; /* for inline */
|
---|
2881 | return ret;
|
---|
2882 | }
|
---|
2883 | else if (rsa_type == RSA_PUBLIC_DECRYPT &&
|
---|
2884 | pad_value == RSA_BLOCK_TYPE_1) {
|
---|
2885 | return cc310_RsaSSL_Verify(in, inLen, out, key,
|
---|
2886 | cc310_hashModeRSA(hash, 0));
|
---|
2887 | }
|
---|
2888 | #endif /* WOLFSSL_CRYPTOCELL */
|
---|
2889 |
|
---|
2890 |
|
---|
2891 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_VERIFY_INLINE)
|
---|
2892 | /* verify the tmp ptr is NULL, otherwise indicates bad state */
|
---|
2893 | if (key->data != NULL) {
|
---|
2894 | ret = BAD_STATE_E;
|
---|
2895 | break;
|
---|
2896 | }
|
---|
2897 |
|
---|
2898 | /* if not doing this inline then allocate a buffer for it */
|
---|
2899 | if (outPtr == NULL) {
|
---|
2900 | key->data = (byte*)XMALLOC(inLen, key->heap,
|
---|
2901 | DYNAMIC_TYPE_WOLF_BIGINT);
|
---|
2902 | key->dataIsAlloc = 1;
|
---|
2903 | if (key->data == NULL) {
|
---|
2904 | ret = MEMORY_E;
|
---|
2905 | break;
|
---|
2906 | }
|
---|
2907 | XMEMCPY(key->data, in, inLen);
|
---|
2908 | }
|
---|
2909 | else {
|
---|
2910 | key->data = out;
|
---|
2911 | }
|
---|
2912 | #endif
|
---|
2913 |
|
---|
2914 | key->state = RSA_STATE_DECRYPT_EXPTMOD;
|
---|
2915 | FALL_THROUGH;
|
---|
2916 |
|
---|
2917 | case RSA_STATE_DECRYPT_EXPTMOD:
|
---|
2918 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_VERIFY_INLINE)
|
---|
2919 | ret = wc_RsaFunction(key->data, inLen, key->data, &key->dataLen,
|
---|
2920 | rsa_type, key, rng);
|
---|
2921 | #else
|
---|
2922 | ret = wc_RsaFunction(in, inLen, out, &key->dataLen, rsa_type, key, rng);
|
---|
2923 | #endif
|
---|
2924 |
|
---|
2925 | if (ret >= 0 || ret == WC_PENDING_E) {
|
---|
2926 | key->state = RSA_STATE_DECRYPT_UNPAD;
|
---|
2927 | }
|
---|
2928 | if (ret < 0) {
|
---|
2929 | break;
|
---|
2930 | }
|
---|
2931 |
|
---|
2932 | FALL_THROUGH;
|
---|
2933 |
|
---|
2934 | case RSA_STATE_DECRYPT_UNPAD:
|
---|
2935 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_VERIFY_INLINE)
|
---|
2936 | ret = wc_RsaUnPad_ex(key->data, key->dataLen, &pad, pad_value, pad_type,
|
---|
2937 | hash, mgf, label, labelSz, saltLen,
|
---|
2938 | mp_count_bits(&key->n), key->heap);
|
---|
2939 | #else
|
---|
2940 | ret = wc_RsaUnPad_ex(out, key->dataLen, &pad, pad_value, pad_type, hash,
|
---|
2941 | mgf, label, labelSz, saltLen,
|
---|
2942 | mp_count_bits(&key->n), key->heap);
|
---|
2943 | #endif
|
---|
2944 | if (rsa_type == RSA_PUBLIC_DECRYPT && ret > (int)outLen)
|
---|
2945 | ret = RSA_BUFFER_E;
|
---|
2946 | else if (ret >= 0 && pad != NULL) {
|
---|
2947 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_VERIFY_INLINE)
|
---|
2948 | signed char c;
|
---|
2949 | #endif
|
---|
2950 |
|
---|
2951 | /* only copy output if not inline */
|
---|
2952 | if (outPtr == NULL) {
|
---|
2953 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) && !defined(WOLFSSL_RSA_VERIFY_INLINE)
|
---|
2954 | if (rsa_type == RSA_PRIVATE_DECRYPT) {
|
---|
2955 | word32 i, j;
|
---|
2956 | int start = (int)((size_t)pad - (size_t)key->data);
|
---|
2957 |
|
---|
2958 | for (i = 0, j = 0; j < key->dataLen; j++) {
|
---|
2959 | out[i] = key->data[j];
|
---|
2960 | c = ctMaskGTE(j, start);
|
---|
2961 | c &= ctMaskLT(i, outLen);
|
---|
2962 | /* 0 - no add, -1 add */
|
---|
2963 | i += (word32)((byte)(-c));
|
---|
2964 | }
|
---|
2965 | }
|
---|
2966 | else
|
---|
2967 | #endif
|
---|
2968 | {
|
---|
2969 | XMEMCPY(out, pad, ret);
|
---|
2970 | }
|
---|
2971 | }
|
---|
2972 | else
|
---|
2973 | *outPtr = pad;
|
---|
2974 |
|
---|
2975 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY)
|
---|
2976 | ret = ctMaskSelInt(ctMaskLTE(ret, outLen), ret, RSA_BUFFER_E);
|
---|
2977 | ret = ctMaskSelInt(ctMaskNotEq(ret, 0), ret, RSA_BUFFER_E);
|
---|
2978 | #else
|
---|
2979 | if (outLen < (word32)ret)
|
---|
2980 | ret = RSA_BUFFER_E;
|
---|
2981 | #endif
|
---|
2982 | }
|
---|
2983 |
|
---|
2984 | key->state = RSA_STATE_DECRYPT_RES;
|
---|
2985 | FALL_THROUGH;
|
---|
2986 |
|
---|
2987 | case RSA_STATE_DECRYPT_RES:
|
---|
2988 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
2989 | defined(HAVE_CAVIUM)
|
---|
2990 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA &&
|
---|
2991 | pad_type != WC_RSA_PSS_PAD) {
|
---|
2992 | if (ret > 0) {
|
---|
2993 | /* convert result */
|
---|
2994 | byte* dataLen = (byte*)&key->dataLen;
|
---|
2995 | ret = (dataLen[0] << 8) | (dataLen[1]);
|
---|
2996 |
|
---|
2997 | if (outPtr)
|
---|
2998 | *outPtr = in;
|
---|
2999 | }
|
---|
3000 | }
|
---|
3001 | #endif
|
---|
3002 | break;
|
---|
3003 |
|
---|
3004 | default:
|
---|
3005 | ret = BAD_STATE_E;
|
---|
3006 | break;
|
---|
3007 | }
|
---|
3008 |
|
---|
3009 | /* if async pending then return and skip done cleanup below */
|
---|
3010 | if (ret == WC_PENDING_E
|
---|
3011 | #ifdef WC_RSA_NONBLOCK
|
---|
3012 | || ret == FP_WOULDBLOCK
|
---|
3013 | #endif
|
---|
3014 | ) {
|
---|
3015 | return ret;
|
---|
3016 | }
|
---|
3017 |
|
---|
3018 | key->state = RSA_STATE_NONE;
|
---|
3019 | wc_RsaCleanup(key);
|
---|
3020 |
|
---|
3021 | return ret;
|
---|
3022 | }
|
---|
3023 |
|
---|
3024 |
|
---|
3025 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
3026 | /* Public RSA Functions */
|
---|
3027 | int wc_RsaPublicEncrypt(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
3028 | RsaKey* key, WC_RNG* rng)
|
---|
3029 | {
|
---|
3030 | return RsaPublicEncryptEx(in, inLen, out, outLen, key,
|
---|
3031 | RSA_PUBLIC_ENCRYPT, RSA_BLOCK_TYPE_2, WC_RSA_PKCSV15_PAD,
|
---|
3032 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
3033 | }
|
---|
3034 |
|
---|
3035 |
|
---|
3036 | #if !defined(WC_NO_RSA_OAEP) || defined(WC_RSA_NO_PADDING)
|
---|
3037 | int wc_RsaPublicEncrypt_ex(const byte* in, word32 inLen, byte* out,
|
---|
3038 | word32 outLen, RsaKey* key, WC_RNG* rng, int type,
|
---|
3039 | enum wc_HashType hash, int mgf, byte* label,
|
---|
3040 | word32 labelSz)
|
---|
3041 | {
|
---|
3042 | return RsaPublicEncryptEx(in, inLen, out, outLen, key, RSA_PUBLIC_ENCRYPT,
|
---|
3043 | RSA_BLOCK_TYPE_2, type, hash, mgf, label, labelSz, 0, rng);
|
---|
3044 | }
|
---|
3045 | #endif /* WC_NO_RSA_OAEP */
|
---|
3046 | #endif
|
---|
3047 |
|
---|
3048 |
|
---|
3049 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
3050 | int wc_RsaPrivateDecryptInline(byte* in, word32 inLen, byte** out, RsaKey* key)
|
---|
3051 | {
|
---|
3052 | WC_RNG* rng;
|
---|
3053 | #ifdef WC_RSA_BLINDING
|
---|
3054 | rng = key->rng;
|
---|
3055 | #else
|
---|
3056 | rng = NULL;
|
---|
3057 | #endif
|
---|
3058 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
3059 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, WC_RSA_PKCSV15_PAD,
|
---|
3060 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
3061 | }
|
---|
3062 |
|
---|
3063 |
|
---|
3064 | #ifndef WC_NO_RSA_OAEP
|
---|
3065 | int wc_RsaPrivateDecryptInline_ex(byte* in, word32 inLen, byte** out,
|
---|
3066 | RsaKey* key, int type, enum wc_HashType hash,
|
---|
3067 | int mgf, byte* label, word32 labelSz)
|
---|
3068 | {
|
---|
3069 | WC_RNG* rng;
|
---|
3070 | #ifdef WC_RSA_BLINDING
|
---|
3071 | rng = key->rng;
|
---|
3072 | #else
|
---|
3073 | rng = NULL;
|
---|
3074 | #endif
|
---|
3075 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
3076 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, type, hash,
|
---|
3077 | mgf, label, labelSz, 0, rng);
|
---|
3078 | }
|
---|
3079 | #endif /* WC_NO_RSA_OAEP */
|
---|
3080 |
|
---|
3081 |
|
---|
3082 | int wc_RsaPrivateDecrypt(const byte* in, word32 inLen, byte* out,
|
---|
3083 | word32 outLen, RsaKey* key)
|
---|
3084 | {
|
---|
3085 | WC_RNG* rng;
|
---|
3086 | #ifdef WC_RSA_BLINDING
|
---|
3087 | rng = key->rng;
|
---|
3088 | #else
|
---|
3089 | rng = NULL;
|
---|
3090 | #endif
|
---|
3091 | return RsaPrivateDecryptEx((byte*)in, inLen, out, outLen, NULL, key,
|
---|
3092 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, WC_RSA_PKCSV15_PAD,
|
---|
3093 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
3094 | }
|
---|
3095 |
|
---|
3096 | #if !defined(WC_NO_RSA_OAEP) || defined(WC_RSA_NO_PADDING)
|
---|
3097 | int wc_RsaPrivateDecrypt_ex(const byte* in, word32 inLen, byte* out,
|
---|
3098 | word32 outLen, RsaKey* key, int type,
|
---|
3099 | enum wc_HashType hash, int mgf, byte* label,
|
---|
3100 | word32 labelSz)
|
---|
3101 | {
|
---|
3102 | WC_RNG* rng;
|
---|
3103 | #ifdef WC_RSA_BLINDING
|
---|
3104 | rng = key->rng;
|
---|
3105 | #else
|
---|
3106 | rng = NULL;
|
---|
3107 | #endif
|
---|
3108 | return RsaPrivateDecryptEx((byte*)in, inLen, out, outLen, NULL, key,
|
---|
3109 | RSA_PRIVATE_DECRYPT, RSA_BLOCK_TYPE_2, type, hash, mgf, label,
|
---|
3110 | labelSz, 0, rng);
|
---|
3111 | }
|
---|
3112 | #endif /* WC_NO_RSA_OAEP || WC_RSA_NO_PADDING */
|
---|
3113 | #endif /* WOLFSSL_RSA_PUBLIC_ONLY */
|
---|
3114 |
|
---|
3115 | #if !defined(WOLFSSL_CRYPTOCELL)
|
---|
3116 | int wc_RsaSSL_VerifyInline(byte* in, word32 inLen, byte** out, RsaKey* key)
|
---|
3117 | {
|
---|
3118 | WC_RNG* rng;
|
---|
3119 | #ifdef WC_RSA_BLINDING
|
---|
3120 | rng = key->rng;
|
---|
3121 | #else
|
---|
3122 | rng = NULL;
|
---|
3123 | #endif
|
---|
3124 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
3125 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PKCSV15_PAD,
|
---|
3126 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
3127 | }
|
---|
3128 | #endif
|
---|
3129 |
|
---|
3130 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
3131 | int wc_RsaSSL_Verify(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
3132 | RsaKey* key)
|
---|
3133 | {
|
---|
3134 | return wc_RsaSSL_Verify_ex(in, inLen, out, outLen, key , WC_RSA_PKCSV15_PAD);
|
---|
3135 | }
|
---|
3136 |
|
---|
3137 | int wc_RsaSSL_Verify_ex(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
3138 | RsaKey* key, int pad_type)
|
---|
3139 | {
|
---|
3140 | WC_RNG* rng;
|
---|
3141 |
|
---|
3142 | if (key == NULL) {
|
---|
3143 | return BAD_FUNC_ARG;
|
---|
3144 | }
|
---|
3145 |
|
---|
3146 | #ifdef WC_RSA_BLINDING
|
---|
3147 | rng = key->rng;
|
---|
3148 | #else
|
---|
3149 | rng = NULL;
|
---|
3150 | #endif
|
---|
3151 |
|
---|
3152 | return RsaPrivateDecryptEx((byte*)in, inLen, out, outLen, NULL, key,
|
---|
3153 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, pad_type,
|
---|
3154 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
3155 | }
|
---|
3156 | #endif
|
---|
3157 |
|
---|
3158 | #ifdef WC_RSA_PSS
|
---|
3159 | /* Verify the message signed with RSA-PSS.
|
---|
3160 | * The input buffer is reused for the output buffer.
|
---|
3161 | * Salt length is equal to hash length.
|
---|
3162 | *
|
---|
3163 | * in Buffer holding encrypted data.
|
---|
3164 | * inLen Length of data in buffer.
|
---|
3165 | * out Pointer to address containing the PSS data.
|
---|
3166 | * hash Hash algorithm.
|
---|
3167 | * mgf Mask generation function.
|
---|
3168 | * key Public RSA key.
|
---|
3169 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
3170 | */
|
---|
3171 | int wc_RsaPSS_VerifyInline(byte* in, word32 inLen, byte** out,
|
---|
3172 | enum wc_HashType hash, int mgf, RsaKey* key)
|
---|
3173 | {
|
---|
3174 | #ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
3175 | return wc_RsaPSS_VerifyInline_ex(in, inLen, out, hash, mgf,
|
---|
3176 | RSA_PSS_SALT_LEN_DEFAULT, key);
|
---|
3177 | #else
|
---|
3178 | return wc_RsaPSS_VerifyInline_ex(in, inLen, out, hash, mgf,
|
---|
3179 | RSA_PSS_SALT_LEN_DISCOVER, key);
|
---|
3180 | #endif
|
---|
3181 | }
|
---|
3182 |
|
---|
3183 | /* Verify the message signed with RSA-PSS.
|
---|
3184 | * The input buffer is reused for the output buffer.
|
---|
3185 | *
|
---|
3186 | * in Buffer holding encrypted data.
|
---|
3187 | * inLen Length of data in buffer.
|
---|
3188 | * out Pointer to address containing the PSS data.
|
---|
3189 | * hash Hash algorithm.
|
---|
3190 | * mgf Mask generation function.
|
---|
3191 | * key Public RSA key.
|
---|
3192 | * saltLen Length of salt used. RSA_PSS_SALT_LEN_DEFAULT (-1) indicates salt
|
---|
3193 | * length is the same as the hash length. RSA_PSS_SALT_LEN_DISCOVER
|
---|
3194 | * indicates salt length is determined from the data.
|
---|
3195 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
3196 | */
|
---|
3197 | int wc_RsaPSS_VerifyInline_ex(byte* in, word32 inLen, byte** out,
|
---|
3198 | enum wc_HashType hash, int mgf, int saltLen,
|
---|
3199 | RsaKey* key)
|
---|
3200 | {
|
---|
3201 | WC_RNG* rng;
|
---|
3202 | #ifdef WC_RSA_BLINDING
|
---|
3203 | rng = key->rng;
|
---|
3204 | #else
|
---|
3205 | rng = NULL;
|
---|
3206 | #endif
|
---|
3207 | return RsaPrivateDecryptEx(in, inLen, in, inLen, out, key,
|
---|
3208 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PSS_PAD,
|
---|
3209 | hash, mgf, NULL, 0, saltLen, rng);
|
---|
3210 | }
|
---|
3211 |
|
---|
3212 | /* Verify the message signed with RSA-PSS.
|
---|
3213 | * Salt length is equal to hash length.
|
---|
3214 | *
|
---|
3215 | * in Buffer holding encrypted data.
|
---|
3216 | * inLen Length of data in buffer.
|
---|
3217 | * out Pointer to address containing the PSS data.
|
---|
3218 | * hash Hash algorithm.
|
---|
3219 | * mgf Mask generation function.
|
---|
3220 | * key Public RSA key.
|
---|
3221 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
3222 | */
|
---|
3223 | int wc_RsaPSS_Verify(byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
3224 | enum wc_HashType hash, int mgf, RsaKey* key)
|
---|
3225 | {
|
---|
3226 | #ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
3227 | return wc_RsaPSS_Verify_ex(in, inLen, out, outLen, hash, mgf,
|
---|
3228 | RSA_PSS_SALT_LEN_DEFAULT, key);
|
---|
3229 | #else
|
---|
3230 | return wc_RsaPSS_Verify_ex(in, inLen, out, outLen, hash, mgf,
|
---|
3231 | RSA_PSS_SALT_LEN_DISCOVER, key);
|
---|
3232 | #endif
|
---|
3233 | }
|
---|
3234 |
|
---|
3235 | /* Verify the message signed with RSA-PSS.
|
---|
3236 | *
|
---|
3237 | * in Buffer holding encrypted data.
|
---|
3238 | * inLen Length of data in buffer.
|
---|
3239 | * out Pointer to address containing the PSS data.
|
---|
3240 | * hash Hash algorithm.
|
---|
3241 | * mgf Mask generation function.
|
---|
3242 | * key Public RSA key.
|
---|
3243 | * saltLen Length of salt used. RSA_PSS_SALT_LEN_DEFAULT (-1) indicates salt
|
---|
3244 | * length is the same as the hash length. RSA_PSS_SALT_LEN_DISCOVER
|
---|
3245 | * indicates salt length is determined from the data.
|
---|
3246 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
3247 | */
|
---|
3248 | int wc_RsaPSS_Verify_ex(byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
3249 | enum wc_HashType hash, int mgf, int saltLen,
|
---|
3250 | RsaKey* key)
|
---|
3251 | {
|
---|
3252 | WC_RNG* rng;
|
---|
3253 | #ifdef WC_RSA_BLINDING
|
---|
3254 | rng = key->rng;
|
---|
3255 | #else
|
---|
3256 | rng = NULL;
|
---|
3257 | #endif
|
---|
3258 | return RsaPrivateDecryptEx(in, inLen, out, outLen, NULL, key,
|
---|
3259 | RSA_PUBLIC_DECRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PSS_PAD,
|
---|
3260 | hash, mgf, NULL, 0, saltLen, rng);
|
---|
3261 | }
|
---|
3262 |
|
---|
3263 |
|
---|
3264 | /* Checks the PSS data to ensure that the signature matches.
|
---|
3265 | * Salt length is equal to hash length.
|
---|
3266 | *
|
---|
3267 | * in Hash of the data that is being verified.
|
---|
3268 | * inSz Length of hash.
|
---|
3269 | * sig Buffer holding PSS data.
|
---|
3270 | * sigSz Size of PSS data.
|
---|
3271 | * hashType Hash algorithm.
|
---|
3272 | * returns BAD_PADDING_E when the PSS data is invalid, BAD_FUNC_ARG when
|
---|
3273 | * NULL is passed in to in or sig or inSz is not the same as the hash
|
---|
3274 | * algorithm length and 0 on success.
|
---|
3275 | */
|
---|
3276 | int wc_RsaPSS_CheckPadding(const byte* in, word32 inSz, byte* sig,
|
---|
3277 | word32 sigSz, enum wc_HashType hashType)
|
---|
3278 | {
|
---|
3279 | return wc_RsaPSS_CheckPadding_ex(in, inSz, sig, sigSz, hashType, inSz, 0);
|
---|
3280 | }
|
---|
3281 |
|
---|
3282 | /* Checks the PSS data to ensure that the signature matches.
|
---|
3283 | *
|
---|
3284 | * in Hash of the data that is being verified.
|
---|
3285 | * inSz Length of hash.
|
---|
3286 | * sig Buffer holding PSS data.
|
---|
3287 | * sigSz Size of PSS data.
|
---|
3288 | * hashType Hash algorithm.
|
---|
3289 | * saltLen Length of salt used. RSA_PSS_SALT_LEN_DEFAULT (-1) indicates salt
|
---|
3290 | * length is the same as the hash length. RSA_PSS_SALT_LEN_DISCOVER
|
---|
3291 | * indicates salt length is determined from the data.
|
---|
3292 | * returns BAD_PADDING_E when the PSS data is invalid, BAD_FUNC_ARG when
|
---|
3293 | * NULL is passed in to in or sig or inSz is not the same as the hash
|
---|
3294 | * algorithm length and 0 on success.
|
---|
3295 | */
|
---|
3296 | int wc_RsaPSS_CheckPadding_ex(const byte* in, word32 inSz, byte* sig,
|
---|
3297 | word32 sigSz, enum wc_HashType hashType,
|
---|
3298 | int saltLen, int bits)
|
---|
3299 | {
|
---|
3300 | int ret = 0;
|
---|
3301 | #ifndef WOLFSSL_PSS_LONG_SALT
|
---|
3302 | byte sigCheck[WC_MAX_DIGEST_SIZE*2 + RSA_PSS_PAD_SZ];
|
---|
3303 | #else
|
---|
3304 | byte *sigCheck = NULL;
|
---|
3305 | #endif
|
---|
3306 |
|
---|
3307 | (void)bits;
|
---|
3308 |
|
---|
3309 | if (in == NULL || sig == NULL ||
|
---|
3310 | inSz != (word32)wc_HashGetDigestSize(hashType)) {
|
---|
3311 | ret = BAD_FUNC_ARG;
|
---|
3312 | }
|
---|
3313 |
|
---|
3314 | if (ret == 0) {
|
---|
3315 | if (saltLen == RSA_PSS_SALT_LEN_DEFAULT) {
|
---|
3316 | saltLen = inSz;
|
---|
3317 | #ifdef WOLFSSL_SHA512
|
---|
3318 | /* See FIPS 186-4 section 5.5 item (e). */
|
---|
3319 | if (bits == 1024 && inSz == WC_SHA512_DIGEST_SIZE) {
|
---|
3320 | saltLen = RSA_PSS_SALT_MAX_SZ;
|
---|
3321 | }
|
---|
3322 | #endif
|
---|
3323 | }
|
---|
3324 | #ifndef WOLFSSL_PSS_LONG_SALT
|
---|
3325 | else if ((word32)saltLen > inSz) {
|
---|
3326 | ret = PSS_SALTLEN_E;
|
---|
3327 | }
|
---|
3328 | #endif
|
---|
3329 | #ifndef WOLFSSL_PSS_SALT_LEN_DISCOVER
|
---|
3330 | else if (saltLen < RSA_PSS_SALT_LEN_DEFAULT) {
|
---|
3331 | ret = PSS_SALTLEN_E;
|
---|
3332 | }
|
---|
3333 | #else
|
---|
3334 | else if (saltLen == RSA_PSS_SALT_LEN_DISCOVER) {
|
---|
3335 | saltLen = sigSz - inSz;
|
---|
3336 | if (saltLen < 0) {
|
---|
3337 | ret = PSS_SALTLEN_E;
|
---|
3338 | }
|
---|
3339 | }
|
---|
3340 | else if (saltLen < RSA_PSS_SALT_LEN_DISCOVER) {
|
---|
3341 | ret = PSS_SALTLEN_E;
|
---|
3342 | }
|
---|
3343 | #endif
|
---|
3344 | }
|
---|
3345 |
|
---|
3346 | /* Sig = Salt | Exp Hash */
|
---|
3347 | if (ret == 0) {
|
---|
3348 | if (sigSz != inSz + saltLen) {
|
---|
3349 | ret = PSS_SALTLEN_E;
|
---|
3350 | }
|
---|
3351 | }
|
---|
3352 |
|
---|
3353 | #ifdef WOLFSSL_PSS_LONG_SALT
|
---|
3354 | if (ret == 0) {
|
---|
3355 | sigCheck = (byte*)XMALLOC(RSA_PSS_PAD_SZ + inSz + saltLen, NULL,
|
---|
3356 | DYNAMIC_TYPE_RSA_BUFFER);
|
---|
3357 | if (sigCheck == NULL) {
|
---|
3358 | ret = MEMORY_E;
|
---|
3359 | }
|
---|
3360 | }
|
---|
3361 | #endif
|
---|
3362 |
|
---|
3363 | /* Exp Hash = HASH(8 * 0x00 | Message Hash | Salt) */
|
---|
3364 | if (ret == 0) {
|
---|
3365 | XMEMSET(sigCheck, 0, RSA_PSS_PAD_SZ);
|
---|
3366 | XMEMCPY(sigCheck + RSA_PSS_PAD_SZ, in, inSz);
|
---|
3367 | XMEMCPY(sigCheck + RSA_PSS_PAD_SZ + inSz, sig, saltLen);
|
---|
3368 | ret = wc_Hash(hashType, sigCheck, RSA_PSS_PAD_SZ + inSz + saltLen,
|
---|
3369 | sigCheck, inSz);
|
---|
3370 | }
|
---|
3371 | if (ret == 0) {
|
---|
3372 | if (XMEMCMP(sigCheck, sig + saltLen, inSz) != 0) {
|
---|
3373 | WOLFSSL_MSG("RsaPSS_CheckPadding: Padding Error");
|
---|
3374 | ret = BAD_PADDING_E;
|
---|
3375 | }
|
---|
3376 | }
|
---|
3377 |
|
---|
3378 | #ifdef WOLFSSL_PSS_LONG_SALT
|
---|
3379 | if (sigCheck != NULL) {
|
---|
3380 | XFREE(sigCheck, NULL, DYNAMIC_TYPE_RSA_BUFFER);
|
---|
3381 | }
|
---|
3382 | #endif
|
---|
3383 | return ret;
|
---|
3384 | }
|
---|
3385 |
|
---|
3386 |
|
---|
3387 | /* Verify the message signed with RSA-PSS.
|
---|
3388 | * The input buffer is reused for the output buffer.
|
---|
3389 | * Salt length is equal to hash length.
|
---|
3390 | *
|
---|
3391 | * in Buffer holding encrypted data.
|
---|
3392 | * inLen Length of data in buffer.
|
---|
3393 | * out Pointer to address containing the PSS data.
|
---|
3394 | * digest Hash of the data that is being verified.
|
---|
3395 | * digestLen Length of hash.
|
---|
3396 | * hash Hash algorithm.
|
---|
3397 | * mgf Mask generation function.
|
---|
3398 | * key Public RSA key.
|
---|
3399 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
3400 | */
|
---|
3401 | int wc_RsaPSS_VerifyCheckInline(byte* in, word32 inLen, byte** out,
|
---|
3402 | const byte* digest, word32 digestLen,
|
---|
3403 | enum wc_HashType hash, int mgf, RsaKey* key)
|
---|
3404 | {
|
---|
3405 | int ret = 0, verify, saltLen, hLen, bits = 0;
|
---|
3406 |
|
---|
3407 | hLen = wc_HashGetDigestSize(hash);
|
---|
3408 | if (hLen < 0)
|
---|
3409 | return hLen;
|
---|
3410 | if ((word32)hLen != digestLen)
|
---|
3411 | return BAD_FUNC_ARG;
|
---|
3412 |
|
---|
3413 | saltLen = hLen;
|
---|
3414 | #ifdef WOLFSSL_SHA512
|
---|
3415 | /* See FIPS 186-4 section 5.5 item (e). */
|
---|
3416 | bits = mp_count_bits(&key->n);
|
---|
3417 | if (bits == 1024 && hLen == WC_SHA512_DIGEST_SIZE)
|
---|
3418 | saltLen = RSA_PSS_SALT_MAX_SZ;
|
---|
3419 | #endif
|
---|
3420 |
|
---|
3421 | verify = wc_RsaPSS_VerifyInline_ex(in, inLen, out, hash, mgf, saltLen, key);
|
---|
3422 | if (verify > 0)
|
---|
3423 | ret = wc_RsaPSS_CheckPadding_ex(digest, digestLen, *out, verify,
|
---|
3424 | hash, saltLen, bits);
|
---|
3425 | if (ret == 0)
|
---|
3426 | ret = verify;
|
---|
3427 |
|
---|
3428 | return ret;
|
---|
3429 | }
|
---|
3430 |
|
---|
3431 |
|
---|
3432 | /* Verify the message signed with RSA-PSS.
|
---|
3433 | * Salt length is equal to hash length.
|
---|
3434 | *
|
---|
3435 | * in Buffer holding encrypted data.
|
---|
3436 | * inLen Length of data in buffer.
|
---|
3437 | * out Pointer to address containing the PSS data.
|
---|
3438 | * outLen Length of the output.
|
---|
3439 | * digest Hash of the data that is being verified.
|
---|
3440 | * digestLen Length of hash.
|
---|
3441 | * hash Hash algorithm.
|
---|
3442 | * mgf Mask generation function.
|
---|
3443 | * key Public RSA key.
|
---|
3444 | * returns the length of the PSS data on success and negative indicates failure.
|
---|
3445 | */
|
---|
3446 | int wc_RsaPSS_VerifyCheck(byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
3447 | const byte* digest, word32 digestLen,
|
---|
3448 | enum wc_HashType hash, int mgf,
|
---|
3449 | RsaKey* key)
|
---|
3450 | {
|
---|
3451 | int ret = 0, verify, saltLen, hLen, bits = 0;
|
---|
3452 |
|
---|
3453 | hLen = wc_HashGetDigestSize(hash);
|
---|
3454 | if (hLen < 0)
|
---|
3455 | return hLen;
|
---|
3456 | if ((word32)hLen != digestLen)
|
---|
3457 | return BAD_FUNC_ARG;
|
---|
3458 |
|
---|
3459 | saltLen = hLen;
|
---|
3460 | #ifdef WOLFSSL_SHA512
|
---|
3461 | /* See FIPS 186-4 section 5.5 item (e). */
|
---|
3462 | bits = mp_count_bits(&key->n);
|
---|
3463 | if (bits == 1024 && hLen == WC_SHA512_DIGEST_SIZE)
|
---|
3464 | saltLen = RSA_PSS_SALT_MAX_SZ;
|
---|
3465 | #endif
|
---|
3466 |
|
---|
3467 | verify = wc_RsaPSS_Verify_ex(in, inLen, out, outLen, hash,
|
---|
3468 | mgf, saltLen, key);
|
---|
3469 | if (verify > 0)
|
---|
3470 | ret = wc_RsaPSS_CheckPadding_ex(digest, digestLen, out, verify,
|
---|
3471 | hash, saltLen, bits);
|
---|
3472 | if (ret == 0)
|
---|
3473 | ret = verify;
|
---|
3474 |
|
---|
3475 | return ret;
|
---|
3476 | }
|
---|
3477 |
|
---|
3478 | #endif
|
---|
3479 |
|
---|
3480 | #if !defined(WOLFSSL_RSA_PUBLIC_ONLY) && !defined(WOLFSSL_RSA_VERIFY_ONLY)
|
---|
3481 | int wc_RsaSSL_Sign(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
3482 | RsaKey* key, WC_RNG* rng)
|
---|
3483 | {
|
---|
3484 | return RsaPublicEncryptEx(in, inLen, out, outLen, key,
|
---|
3485 | RSA_PRIVATE_ENCRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PKCSV15_PAD,
|
---|
3486 | WC_HASH_TYPE_NONE, WC_MGF1NONE, NULL, 0, 0, rng);
|
---|
3487 | }
|
---|
3488 |
|
---|
3489 | #ifdef WC_RSA_PSS
|
---|
3490 | /* Sign the hash of a message using RSA-PSS.
|
---|
3491 | * Salt length is equal to hash length.
|
---|
3492 | *
|
---|
3493 | * in Buffer holding hash of message.
|
---|
3494 | * inLen Length of data in buffer (hash length).
|
---|
3495 | * out Buffer to write encrypted signature into.
|
---|
3496 | * outLen Size of buffer to write to.
|
---|
3497 | * hash Hash algorithm.
|
---|
3498 | * mgf Mask generation function.
|
---|
3499 | * key Public RSA key.
|
---|
3500 | * rng Random number generator.
|
---|
3501 | * returns the length of the encrypted signature on success, a negative value
|
---|
3502 | * indicates failure.
|
---|
3503 | */
|
---|
3504 | int wc_RsaPSS_Sign(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
3505 | enum wc_HashType hash, int mgf, RsaKey* key, WC_RNG* rng)
|
---|
3506 | {
|
---|
3507 | return wc_RsaPSS_Sign_ex(in, inLen, out, outLen, hash, mgf,
|
---|
3508 | RSA_PSS_SALT_LEN_DEFAULT, key, rng);
|
---|
3509 | }
|
---|
3510 |
|
---|
3511 | /* Sign the hash of a message using RSA-PSS.
|
---|
3512 | *
|
---|
3513 | * in Buffer holding hash of message.
|
---|
3514 | * inLen Length of data in buffer (hash length).
|
---|
3515 | * out Buffer to write encrypted signature into.
|
---|
3516 | * outLen Size of buffer to write to.
|
---|
3517 | * hash Hash algorithm.
|
---|
3518 | * mgf Mask generation function.
|
---|
3519 | * saltLen Length of salt used. RSA_PSS_SALT_LEN_DEFAULT (-1) indicates salt
|
---|
3520 | * length is the same as the hash length. RSA_PSS_SALT_LEN_DISCOVER
|
---|
3521 | * indicates salt length is determined from the data.
|
---|
3522 | * key Public RSA key.
|
---|
3523 | * rng Random number generator.
|
---|
3524 | * returns the length of the encrypted signature on success, a negative value
|
---|
3525 | * indicates failure.
|
---|
3526 | */
|
---|
3527 | int wc_RsaPSS_Sign_ex(const byte* in, word32 inLen, byte* out, word32 outLen,
|
---|
3528 | enum wc_HashType hash, int mgf, int saltLen, RsaKey* key,
|
---|
3529 | WC_RNG* rng)
|
---|
3530 | {
|
---|
3531 | return RsaPublicEncryptEx(in, inLen, out, outLen, key,
|
---|
3532 | RSA_PRIVATE_ENCRYPT, RSA_BLOCK_TYPE_1, WC_RSA_PSS_PAD,
|
---|
3533 | hash, mgf, NULL, 0, saltLen, rng);
|
---|
3534 | }
|
---|
3535 | #endif
|
---|
3536 | #endif
|
---|
3537 |
|
---|
3538 | #if !defined(WOLFSSL_RSA_VERIFY_ONLY) || !defined(WOLFSSL_SP_MATH) || \
|
---|
3539 | defined(WC_RSA_PSS)
|
---|
3540 | int wc_RsaEncryptSize(RsaKey* key)
|
---|
3541 | {
|
---|
3542 | int ret;
|
---|
3543 |
|
---|
3544 | if (key == NULL) {
|
---|
3545 | return BAD_FUNC_ARG;
|
---|
3546 | }
|
---|
3547 |
|
---|
3548 | ret = mp_unsigned_bin_size(&key->n);
|
---|
3549 |
|
---|
3550 | #ifdef WOLF_CRYPTO_CB
|
---|
3551 | if (ret == 0 && key->devId != INVALID_DEVID) {
|
---|
3552 | ret = 2048/8; /* hardware handles, use 2048-bit as default */
|
---|
3553 | }
|
---|
3554 | #endif
|
---|
3555 |
|
---|
3556 | return ret;
|
---|
3557 | }
|
---|
3558 | #endif
|
---|
3559 |
|
---|
3560 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
3561 | /* flatten RsaKey structure into individual elements (e, n) */
|
---|
3562 | int wc_RsaFlattenPublicKey(RsaKey* key, byte* e, word32* eSz, byte* n,
|
---|
3563 | word32* nSz)
|
---|
3564 | {
|
---|
3565 | int sz, ret;
|
---|
3566 |
|
---|
3567 | if (key == NULL || e == NULL || eSz == NULL || n == NULL || nSz == NULL) {
|
---|
3568 | return BAD_FUNC_ARG;
|
---|
3569 | }
|
---|
3570 |
|
---|
3571 | sz = mp_unsigned_bin_size(&key->e);
|
---|
3572 | if ((word32)sz > *eSz)
|
---|
3573 | return RSA_BUFFER_E;
|
---|
3574 | ret = mp_to_unsigned_bin(&key->e, e);
|
---|
3575 | if (ret != MP_OKAY)
|
---|
3576 | return ret;
|
---|
3577 | *eSz = (word32)sz;
|
---|
3578 |
|
---|
3579 | sz = wc_RsaEncryptSize(key);
|
---|
3580 | if ((word32)sz > *nSz)
|
---|
3581 | return RSA_BUFFER_E;
|
---|
3582 | ret = mp_to_unsigned_bin(&key->n, n);
|
---|
3583 | if (ret != MP_OKAY)
|
---|
3584 | return ret;
|
---|
3585 | *nSz = (word32)sz;
|
---|
3586 |
|
---|
3587 | return 0;
|
---|
3588 | }
|
---|
3589 | #endif
|
---|
3590 |
|
---|
3591 | #endif /* HAVE_FIPS */
|
---|
3592 |
|
---|
3593 |
|
---|
3594 | #ifndef WOLFSSL_RSA_VERIFY_ONLY
|
---|
3595 | static int RsaGetValue(mp_int* in, byte* out, word32* outSz)
|
---|
3596 | {
|
---|
3597 | word32 sz;
|
---|
3598 | int ret = 0;
|
---|
3599 |
|
---|
3600 | /* Parameters ensured by calling function. */
|
---|
3601 |
|
---|
3602 | sz = (word32)mp_unsigned_bin_size(in);
|
---|
3603 | if (sz > *outSz)
|
---|
3604 | ret = RSA_BUFFER_E;
|
---|
3605 |
|
---|
3606 | if (ret == 0)
|
---|
3607 | ret = mp_to_unsigned_bin(in, out);
|
---|
3608 |
|
---|
3609 | if (ret == MP_OKAY)
|
---|
3610 | *outSz = sz;
|
---|
3611 |
|
---|
3612 | return ret;
|
---|
3613 | }
|
---|
3614 |
|
---|
3615 |
|
---|
3616 | int wc_RsaExportKey(RsaKey* key,
|
---|
3617 | byte* e, word32* eSz, byte* n, word32* nSz,
|
---|
3618 | byte* d, word32* dSz, byte* p, word32* pSz,
|
---|
3619 | byte* q, word32* qSz)
|
---|
3620 | {
|
---|
3621 | int ret = BAD_FUNC_ARG;
|
---|
3622 |
|
---|
3623 | if (key && e && eSz && n && nSz && d && dSz && p && pSz && q && qSz)
|
---|
3624 | ret = 0;
|
---|
3625 |
|
---|
3626 | if (ret == 0)
|
---|
3627 | ret = RsaGetValue(&key->e, e, eSz);
|
---|
3628 | if (ret == 0)
|
---|
3629 | ret = RsaGetValue(&key->n, n, nSz);
|
---|
3630 | #ifndef WOLFSSL_RSA_PUBLIC_ONLY
|
---|
3631 | if (ret == 0)
|
---|
3632 | ret = RsaGetValue(&key->d, d, dSz);
|
---|
3633 | if (ret == 0)
|
---|
3634 | ret = RsaGetValue(&key->p, p, pSz);
|
---|
3635 | if (ret == 0)
|
---|
3636 | ret = RsaGetValue(&key->q, q, qSz);
|
---|
3637 | #else
|
---|
3638 | /* no private parts to key */
|
---|
3639 | if (d == NULL || p == NULL || q == NULL || dSz == NULL || pSz == NULL
|
---|
3640 | || qSz == NULL) {
|
---|
3641 | ret = BAD_FUNC_ARG;
|
---|
3642 | }
|
---|
3643 | else {
|
---|
3644 | *dSz = 0;
|
---|
3645 | *pSz = 0;
|
---|
3646 | *qSz = 0;
|
---|
3647 | }
|
---|
3648 | #endif /* WOLFSSL_RSA_PUBLIC_ONLY */
|
---|
3649 |
|
---|
3650 | return ret;
|
---|
3651 | }
|
---|
3652 | #endif
|
---|
3653 |
|
---|
3654 |
|
---|
3655 | #ifdef WOLFSSL_KEY_GEN
|
---|
3656 |
|
---|
3657 | /* Check that |p-q| > 2^((size/2)-100) */
|
---|
3658 | static int wc_CompareDiffPQ(mp_int* p, mp_int* q, int size)
|
---|
3659 | {
|
---|
3660 | mp_int c, d;
|
---|
3661 | int ret;
|
---|
3662 |
|
---|
3663 | if (p == NULL || q == NULL)
|
---|
3664 | return BAD_FUNC_ARG;
|
---|
3665 |
|
---|
3666 | ret = mp_init_multi(&c, &d, NULL, NULL, NULL, NULL);
|
---|
3667 |
|
---|
3668 | /* c = 2^((size/2)-100) */
|
---|
3669 | if (ret == 0)
|
---|
3670 | ret = mp_2expt(&c, (size/2)-100);
|
---|
3671 |
|
---|
3672 | /* d = |p-q| */
|
---|
3673 | if (ret == 0)
|
---|
3674 | ret = mp_sub(p, q, &d);
|
---|
3675 |
|
---|
3676 | if (ret == 0)
|
---|
3677 | ret = mp_abs(&d, &d);
|
---|
3678 |
|
---|
3679 | /* compare */
|
---|
3680 | if (ret == 0)
|
---|
3681 | ret = mp_cmp(&d, &c);
|
---|
3682 |
|
---|
3683 | if (ret == MP_GT)
|
---|
3684 | ret = MP_OKAY;
|
---|
3685 |
|
---|
3686 | mp_clear(&d);
|
---|
3687 | mp_clear(&c);
|
---|
3688 |
|
---|
3689 | return ret;
|
---|
3690 | }
|
---|
3691 |
|
---|
3692 |
|
---|
3693 | /* The lower_bound value is floor(2^(0.5) * 2^((nlen/2)-1)) where nlen is 4096.
|
---|
3694 | * This number was calculated using a small test tool written with a common
|
---|
3695 | * large number math library. Other values of nlen may be checked with a subset
|
---|
3696 | * of lower_bound. */
|
---|
3697 | static const byte lower_bound[] = {
|
---|
3698 | 0xB5, 0x04, 0xF3, 0x33, 0xF9, 0xDE, 0x64, 0x84,
|
---|
3699 | 0x59, 0x7D, 0x89, 0xB3, 0x75, 0x4A, 0xBE, 0x9F,
|
---|
3700 | 0x1D, 0x6F, 0x60, 0xBA, 0x89, 0x3B, 0xA8, 0x4C,
|
---|
3701 | 0xED, 0x17, 0xAC, 0x85, 0x83, 0x33, 0x99, 0x15,
|
---|
3702 | /* 512 */
|
---|
3703 | 0x4A, 0xFC, 0x83, 0x04, 0x3A, 0xB8, 0xA2, 0xC3,
|
---|
3704 | 0xA8, 0xB1, 0xFE, 0x6F, 0xDC, 0x83, 0xDB, 0x39,
|
---|
3705 | 0x0F, 0x74, 0xA8, 0x5E, 0x43, 0x9C, 0x7B, 0x4A,
|
---|
3706 | 0x78, 0x04, 0x87, 0x36, 0x3D, 0xFA, 0x27, 0x68,
|
---|
3707 | /* 1024 */
|
---|
3708 | 0xD2, 0x20, 0x2E, 0x87, 0x42, 0xAF, 0x1F, 0x4E,
|
---|
3709 | 0x53, 0x05, 0x9C, 0x60, 0x11, 0xBC, 0x33, 0x7B,
|
---|
3710 | 0xCA, 0xB1, 0xBC, 0x91, 0x16, 0x88, 0x45, 0x8A,
|
---|
3711 | 0x46, 0x0A, 0xBC, 0x72, 0x2F, 0x7C, 0x4E, 0x33,
|
---|
3712 | 0xC6, 0xD5, 0xA8, 0xA3, 0x8B, 0xB7, 0xE9, 0xDC,
|
---|
3713 | 0xCB, 0x2A, 0x63, 0x43, 0x31, 0xF3, 0xC8, 0x4D,
|
---|
3714 | 0xF5, 0x2F, 0x12, 0x0F, 0x83, 0x6E, 0x58, 0x2E,
|
---|
3715 | 0xEA, 0xA4, 0xA0, 0x89, 0x90, 0x40, 0xCA, 0x4A,
|
---|
3716 | /* 2048 */
|
---|
3717 | 0x81, 0x39, 0x4A, 0xB6, 0xD8, 0xFD, 0x0E, 0xFD,
|
---|
3718 | 0xF4, 0xD3, 0xA0, 0x2C, 0xEB, 0xC9, 0x3E, 0x0C,
|
---|
3719 | 0x42, 0x64, 0xDA, 0xBC, 0xD5, 0x28, 0xB6, 0x51,
|
---|
3720 | 0xB8, 0xCF, 0x34, 0x1B, 0x6F, 0x82, 0x36, 0xC7,
|
---|
3721 | 0x01, 0x04, 0xDC, 0x01, 0xFE, 0x32, 0x35, 0x2F,
|
---|
3722 | 0x33, 0x2A, 0x5E, 0x9F, 0x7B, 0xDA, 0x1E, 0xBF,
|
---|
3723 | 0xF6, 0xA1, 0xBE, 0x3F, 0xCA, 0x22, 0x13, 0x07,
|
---|
3724 | 0xDE, 0xA0, 0x62, 0x41, 0xF7, 0xAA, 0x81, 0xC2,
|
---|
3725 | /* 3072 */
|
---|
3726 | 0xC1, 0xFC, 0xBD, 0xDE, 0xA2, 0xF7, 0xDC, 0x33,
|
---|
3727 | 0x18, 0x83, 0x8A, 0x2E, 0xAF, 0xF5, 0xF3, 0xB2,
|
---|
3728 | 0xD2, 0x4F, 0x4A, 0x76, 0x3F, 0xAC, 0xB8, 0x82,
|
---|
3729 | 0xFD, 0xFE, 0x17, 0x0F, 0xD3, 0xB1, 0xF7, 0x80,
|
---|
3730 | 0xF9, 0xAC, 0xCE, 0x41, 0x79, 0x7F, 0x28, 0x05,
|
---|
3731 | 0xC2, 0x46, 0x78, 0x5E, 0x92, 0x95, 0x70, 0x23,
|
---|
3732 | 0x5F, 0xCF, 0x8F, 0x7B, 0xCA, 0x3E, 0xA3, 0x3B,
|
---|
3733 | 0x4D, 0x7C, 0x60, 0xA5, 0xE6, 0x33, 0xE3, 0xE1
|
---|
3734 | /* 4096 */
|
---|
3735 | };
|
---|
3736 |
|
---|
3737 |
|
---|
3738 | /* returns 1 on key size ok and 0 if not ok */
|
---|
3739 | static WC_INLINE int RsaSizeCheck(int size)
|
---|
3740 | {
|
---|
3741 | if (size < RSA_MIN_SIZE || size > RSA_MAX_SIZE) {
|
---|
3742 | return 0;
|
---|
3743 | }
|
---|
3744 |
|
---|
3745 | #ifdef HAVE_FIPS
|
---|
3746 | /* Key size requirements for CAVP */
|
---|
3747 | switch (size) {
|
---|
3748 | case 1024:
|
---|
3749 | case 2048:
|
---|
3750 | case 3072:
|
---|
3751 | case 4096:
|
---|
3752 | return 1;
|
---|
3753 | }
|
---|
3754 |
|
---|
3755 | return 0;
|
---|
3756 | #else
|
---|
3757 | return 1; /* allow unusual key sizes in non FIPS mode */
|
---|
3758 | #endif /* HAVE_FIPS */
|
---|
3759 | }
|
---|
3760 |
|
---|
3761 |
|
---|
3762 | static int _CheckProbablePrime(mp_int* p, mp_int* q, mp_int* e, int nlen,
|
---|
3763 | int* isPrime, WC_RNG* rng)
|
---|
3764 | {
|
---|
3765 | int ret;
|
---|
3766 | mp_int tmp1, tmp2;
|
---|
3767 | mp_int* prime;
|
---|
3768 |
|
---|
3769 | if (p == NULL || e == NULL || isPrime == NULL)
|
---|
3770 | return BAD_FUNC_ARG;
|
---|
3771 |
|
---|
3772 | if (!RsaSizeCheck(nlen))
|
---|
3773 | return BAD_FUNC_ARG;
|
---|
3774 |
|
---|
3775 | *isPrime = MP_NO;
|
---|
3776 |
|
---|
3777 | if (q != NULL) {
|
---|
3778 | /* 5.4 - check that |p-q| <= (2^(1/2))(2^((nlen/2)-1)) */
|
---|
3779 | ret = wc_CompareDiffPQ(p, q, nlen);
|
---|
3780 | if (ret != MP_OKAY) goto notOkay;
|
---|
3781 | prime = q;
|
---|
3782 | }
|
---|
3783 | else
|
---|
3784 | prime = p;
|
---|
3785 |
|
---|
3786 | ret = mp_init_multi(&tmp1, &tmp2, NULL, NULL, NULL, NULL);
|
---|
3787 | if (ret != MP_OKAY) goto notOkay;
|
---|
3788 |
|
---|
3789 | /* 4.4,5.5 - Check that prime >= (2^(1/2))(2^((nlen/2)-1))
|
---|
3790 | * This is a comparison against lowerBound */
|
---|
3791 | ret = mp_read_unsigned_bin(&tmp1, lower_bound, nlen/16);
|
---|
3792 | if (ret != MP_OKAY) goto notOkay;
|
---|
3793 | ret = mp_cmp(prime, &tmp1);
|
---|
3794 | if (ret == MP_LT) goto exit;
|
---|
3795 |
|
---|
3796 | /* 4.5,5.6 - Check that GCD(p-1, e) == 1 */
|
---|
3797 | ret = mp_sub_d(prime, 1, &tmp1); /* tmp1 = prime-1 */
|
---|
3798 | if (ret != MP_OKAY) goto notOkay;
|
---|
3799 | ret = mp_gcd(&tmp1, e, &tmp2); /* tmp2 = gcd(prime-1, e) */
|
---|
3800 | if (ret != MP_OKAY) goto notOkay;
|
---|
3801 | ret = mp_cmp_d(&tmp2, 1);
|
---|
3802 | if (ret != MP_EQ) goto exit; /* e divides p-1 */
|
---|
3803 |
|
---|
3804 | /* 4.5.1,5.6.1 - Check primality of p with 8 rounds of M-R.
|
---|
3805 | * mp_prime_is_prime_ex() performs test divisions against the first 256
|
---|
3806 | * prime numbers. After that it performs 8 rounds of M-R using random
|
---|
3807 | * bases between 2 and n-2.
|
---|
3808 | * mp_prime_is_prime() performs the same test divisions and then does
|
---|
3809 | * M-R with the first 8 primes. Both functions set isPrime as a
|
---|
3810 | * side-effect. */
|
---|
3811 | if (rng != NULL)
|
---|
3812 | ret = mp_prime_is_prime_ex(prime, 8, isPrime, rng);
|
---|
3813 | else
|
---|
3814 | ret = mp_prime_is_prime(prime, 8, isPrime);
|
---|
3815 | if (ret != MP_OKAY) goto notOkay;
|
---|
3816 |
|
---|
3817 | exit:
|
---|
3818 | ret = MP_OKAY;
|
---|
3819 | notOkay:
|
---|
3820 | mp_clear(&tmp1);
|
---|
3821 | mp_clear(&tmp2);
|
---|
3822 | return ret;
|
---|
3823 | }
|
---|
3824 |
|
---|
3825 |
|
---|
3826 | int wc_CheckProbablePrime_ex(const byte* pRaw, word32 pRawSz,
|
---|
3827 | const byte* qRaw, word32 qRawSz,
|
---|
3828 | const byte* eRaw, word32 eRawSz,
|
---|
3829 | int nlen, int* isPrime, WC_RNG* rng)
|
---|
3830 | {
|
---|
3831 | mp_int p, q, e;
|
---|
3832 | mp_int* Q = NULL;
|
---|
3833 | int ret;
|
---|
3834 |
|
---|
3835 | if (pRaw == NULL || pRawSz == 0 ||
|
---|
3836 | eRaw == NULL || eRawSz == 0 ||
|
---|
3837 | isPrime == NULL) {
|
---|
3838 |
|
---|
3839 | return BAD_FUNC_ARG;
|
---|
3840 | }
|
---|
3841 |
|
---|
3842 | if ((qRaw != NULL && qRawSz == 0) || (qRaw == NULL && qRawSz != 0))
|
---|
3843 | return BAD_FUNC_ARG;
|
---|
3844 |
|
---|
3845 | ret = mp_init_multi(&p, &q, &e, NULL, NULL, NULL);
|
---|
3846 |
|
---|
3847 | if (ret == MP_OKAY)
|
---|
3848 | ret = mp_read_unsigned_bin(&p, pRaw, pRawSz);
|
---|
3849 |
|
---|
3850 | if (ret == MP_OKAY) {
|
---|
3851 | if (qRaw != NULL) {
|
---|
3852 | ret = mp_read_unsigned_bin(&q, qRaw, qRawSz);
|
---|
3853 | if (ret == MP_OKAY)
|
---|
3854 | Q = &q;
|
---|
3855 | }
|
---|
3856 | }
|
---|
3857 |
|
---|
3858 | if (ret == MP_OKAY)
|
---|
3859 | ret = mp_read_unsigned_bin(&e, eRaw, eRawSz);
|
---|
3860 |
|
---|
3861 | if (ret == MP_OKAY)
|
---|
3862 | ret = _CheckProbablePrime(&p, Q, &e, nlen, isPrime, rng);
|
---|
3863 |
|
---|
3864 | ret = (ret == MP_OKAY) ? 0 : PRIME_GEN_E;
|
---|
3865 |
|
---|
3866 | mp_clear(&p);
|
---|
3867 | mp_clear(&q);
|
---|
3868 | mp_clear(&e);
|
---|
3869 |
|
---|
3870 | return ret;
|
---|
3871 | }
|
---|
3872 |
|
---|
3873 |
|
---|
3874 | int wc_CheckProbablePrime(const byte* pRaw, word32 pRawSz,
|
---|
3875 | const byte* qRaw, word32 qRawSz,
|
---|
3876 | const byte* eRaw, word32 eRawSz,
|
---|
3877 | int nlen, int* isPrime)
|
---|
3878 | {
|
---|
3879 | return wc_CheckProbablePrime_ex(pRaw, pRawSz, qRaw, qRawSz,
|
---|
3880 | eRaw, eRawSz, nlen, isPrime, NULL);
|
---|
3881 | }
|
---|
3882 |
|
---|
3883 | #if !defined(HAVE_FIPS) || (defined(HAVE_FIPS) && \
|
---|
3884 | defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2))
|
---|
3885 | /* Make an RSA key for size bits, with e specified, 65537 is a good e */
|
---|
3886 | int wc_MakeRsaKey(RsaKey* key, int size, long e, WC_RNG* rng)
|
---|
3887 | {
|
---|
3888 | #ifndef WC_NO_RNG
|
---|
3889 | mp_int p, q, tmp1, tmp2, tmp3;
|
---|
3890 | int err, i, failCount, primeSz, isPrime = 0;
|
---|
3891 | byte* buf = NULL;
|
---|
3892 |
|
---|
3893 | if (key == NULL || rng == NULL)
|
---|
3894 | return BAD_FUNC_ARG;
|
---|
3895 |
|
---|
3896 | if (!RsaSizeCheck(size))
|
---|
3897 | return BAD_FUNC_ARG;
|
---|
3898 |
|
---|
3899 | if (e < 3 || (e & 1) == 0)
|
---|
3900 | return BAD_FUNC_ARG;
|
---|
3901 |
|
---|
3902 | #if defined(WOLFSSL_CRYPTOCELL)
|
---|
3903 |
|
---|
3904 | return cc310_RSA_GenerateKeyPair(key, size, e);
|
---|
3905 |
|
---|
3906 | #endif /*WOLFSSL_CRYPTOCELL*/
|
---|
3907 |
|
---|
3908 | #ifdef WOLF_CRYPTO_CB
|
---|
3909 | if (key->devId != INVALID_DEVID) {
|
---|
3910 | int ret = wc_CryptoCb_MakeRsaKey(key, size, e, rng);
|
---|
3911 | if (ret != CRYPTOCB_UNAVAILABLE)
|
---|
3912 | return ret;
|
---|
3913 | /* fall-through when unavailable */
|
---|
3914 | }
|
---|
3915 | #endif
|
---|
3916 |
|
---|
3917 | #if defined(WOLFSSL_ASYNC_CRYPT) && defined(WC_ASYNC_ENABLE_RSA) && \
|
---|
3918 | defined(WC_ASYNC_ENABLE_RSA_KEYGEN)
|
---|
3919 | if (key->asyncDev.marker == WOLFSSL_ASYNC_MARKER_RSA) {
|
---|
3920 | #ifdef HAVE_CAVIUM
|
---|
3921 | /* TODO: Not implemented */
|
---|
3922 | #elif defined(HAVE_INTEL_QA)
|
---|
3923 | return IntelQaRsaKeyGen(&key->asyncDev, key, size, e, rng);
|
---|
3924 | #else
|
---|
3925 | if (wc_AsyncTestInit(&key->asyncDev, ASYNC_TEST_RSA_MAKE)) {
|
---|
3926 | WC_ASYNC_TEST* testDev = &key->asyncDev.test;
|
---|
3927 | testDev->rsaMake.rng = rng;
|
---|
3928 | testDev->rsaMake.key = key;
|
---|
3929 | testDev->rsaMake.size = size;
|
---|
3930 | testDev->rsaMake.e = e;
|
---|
3931 | return WC_PENDING_E;
|
---|
3932 | }
|
---|
3933 | #endif
|
---|
3934 | }
|
---|
3935 | #endif
|
---|
3936 |
|
---|
3937 | err = mp_init_multi(&p, &q, &tmp1, &tmp2, &tmp3, NULL);
|
---|
3938 |
|
---|
3939 | if (err == MP_OKAY)
|
---|
3940 | err = mp_set_int(&tmp3, e);
|
---|
3941 |
|
---|
3942 | /* The failCount value comes from NIST FIPS 186-4, section B.3.3,
|
---|
3943 | * process steps 4.7 and 5.8. */
|
---|
3944 | failCount = 5 * (size / 2);
|
---|
3945 | primeSz = size / 16; /* size is the size of n in bits.
|
---|
3946 | primeSz is in bytes. */
|
---|
3947 |
|
---|
3948 | /* allocate buffer to work with */
|
---|
3949 | if (err == MP_OKAY) {
|
---|
3950 | buf = (byte*)XMALLOC(primeSz, key->heap, DYNAMIC_TYPE_RSA);
|
---|
3951 | if (buf == NULL)
|
---|
3952 | err = MEMORY_E;
|
---|
3953 | }
|
---|
3954 |
|
---|
3955 | /* make p */
|
---|
3956 | if (err == MP_OKAY) {
|
---|
3957 | isPrime = 0;
|
---|
3958 | i = 0;
|
---|
3959 | do {
|
---|
3960 | #ifdef SHOW_GEN
|
---|
3961 | printf(".");
|
---|
3962 | fflush(stdout);
|
---|
3963 | #endif
|
---|
3964 | /* generate value */
|
---|
3965 | err = wc_RNG_GenerateBlock(rng, buf, primeSz);
|
---|
3966 | if (err == 0) {
|
---|
3967 | /* prime lower bound has the MSB set, set it in candidate */
|
---|
3968 | buf[0] |= 0x80;
|
---|
3969 | /* make candidate odd */
|
---|
3970 | buf[primeSz-1] |= 0x01;
|
---|
3971 | /* load value */
|
---|
3972 | err = mp_read_unsigned_bin(&p, buf, primeSz);
|
---|
3973 | }
|
---|
3974 |
|
---|
3975 | if (err == MP_OKAY)
|
---|
3976 | err = _CheckProbablePrime(&p, NULL, &tmp3, size, &isPrime, rng);
|
---|
3977 |
|
---|
3978 | #ifdef HAVE_FIPS
|
---|
3979 | i++;
|
---|
3980 | #else
|
---|
3981 | /* Keep the old retry behavior in non-FIPS build. */
|
---|
3982 | (void)i;
|
---|
3983 | #endif
|
---|
3984 | } while (err == MP_OKAY && !isPrime && i < failCount);
|
---|
3985 | }
|
---|
3986 |
|
---|
3987 | if (err == MP_OKAY && !isPrime)
|
---|
3988 | err = PRIME_GEN_E;
|
---|
3989 |
|
---|
3990 | /* make q */
|
---|
3991 | if (err == MP_OKAY) {
|
---|
3992 | isPrime = 0;
|
---|
3993 | i = 0;
|
---|
3994 | do {
|
---|
3995 | #ifdef SHOW_GEN
|
---|
3996 | printf(".");
|
---|
3997 | fflush(stdout);
|
---|
3998 | #endif
|
---|
3999 | /* generate value */
|
---|
4000 | err = wc_RNG_GenerateBlock(rng, buf, primeSz);
|
---|
4001 | if (err == 0) {
|
---|
4002 | /* prime lower bound has the MSB set, set it in candidate */
|
---|
4003 | buf[0] |= 0x80;
|
---|
4004 | /* make candidate odd */
|
---|
4005 | buf[primeSz-1] |= 0x01;
|
---|
4006 | /* load value */
|
---|
4007 | err = mp_read_unsigned_bin(&q, buf, primeSz);
|
---|
4008 | }
|
---|
4009 |
|
---|
4010 | if (err == MP_OKAY)
|
---|
4011 | err = _CheckProbablePrime(&p, &q, &tmp3, size, &isPrime, rng);
|
---|
4012 |
|
---|
4013 | #ifdef HAVE_FIPS
|
---|
4014 | i++;
|
---|
4015 | #else
|
---|
4016 | /* Keep the old retry behavior in non-FIPS build. */
|
---|
4017 | (void)i;
|
---|
4018 | #endif
|
---|
4019 | } while (err == MP_OKAY && !isPrime && i < failCount);
|
---|
4020 | }
|
---|
4021 |
|
---|
4022 | if (err == MP_OKAY && !isPrime)
|
---|
4023 | err = PRIME_GEN_E;
|
---|
4024 |
|
---|
4025 | if (buf) {
|
---|
4026 | ForceZero(buf, primeSz);
|
---|
4027 | XFREE(buf, key->heap, DYNAMIC_TYPE_RSA);
|
---|
4028 | }
|
---|
4029 |
|
---|
4030 | if (err == MP_OKAY && mp_cmp(&p, &q) < 0) {
|
---|
4031 | err = mp_copy(&p, &tmp1);
|
---|
4032 | if (err == MP_OKAY)
|
---|
4033 | err = mp_copy(&q, &p);
|
---|
4034 | if (err == MP_OKAY)
|
---|
4035 | mp_copy(&tmp1, &q);
|
---|
4036 | }
|
---|
4037 |
|
---|
4038 | /* Setup RsaKey buffers */
|
---|
4039 | if (err == MP_OKAY)
|
---|
4040 | err = mp_init_multi(&key->n, &key->e, &key->d, &key->p, &key->q, NULL);
|
---|
4041 | if (err == MP_OKAY)
|
---|
4042 | err = mp_init_multi(&key->dP, &key->dQ, &key->u, NULL, NULL, NULL);
|
---|
4043 |
|
---|
4044 | /* Software Key Calculation */
|
---|
4045 | if (err == MP_OKAY) /* tmp1 = p-1 */
|
---|
4046 | err = mp_sub_d(&p, 1, &tmp1);
|
---|
4047 | if (err == MP_OKAY) /* tmp2 = q-1 */
|
---|
4048 | err = mp_sub_d(&q, 1, &tmp2);
|
---|
4049 | #ifdef WC_RSA_BLINDING
|
---|
4050 | if (err == MP_OKAY) /* tmp3 = order of n */
|
---|
4051 | err = mp_mul(&tmp1, &tmp2, &tmp3);
|
---|
4052 | #else
|
---|
4053 | if (err == MP_OKAY) /* tmp3 = lcm(p-1, q-1), last loop */
|
---|
4054 | err = mp_lcm(&tmp1, &tmp2, &tmp3);
|
---|
4055 | #endif
|
---|
4056 | /* make key */
|
---|
4057 | if (err == MP_OKAY) /* key->e = e */
|
---|
4058 | err = mp_set_int(&key->e, (mp_digit)e);
|
---|
4059 | #ifdef WC_RSA_BLINDING
|
---|
4060 | /* Blind the inverse operation with a value that is invertable */
|
---|
4061 | if (err == MP_OKAY) {
|
---|
4062 | do {
|
---|
4063 | err = mp_rand(&key->p, get_digit_count(&tmp3), rng);
|
---|
4064 | if (err == MP_OKAY)
|
---|
4065 | err = mp_set_bit(&key->p, 0);
|
---|
4066 | if (err == MP_OKAY)
|
---|
4067 | err = mp_set_bit(&key->p, size - 1);
|
---|
4068 | if (err == MP_OKAY)
|
---|
4069 | err = mp_gcd(&key->p, &tmp3, &key->q);
|
---|
4070 | }
|
---|
4071 | while ((err == MP_OKAY) && !mp_isone(&key->q));
|
---|
4072 | }
|
---|
4073 | if (err == MP_OKAY)
|
---|
4074 | err = mp_mul_d(&key->p, (mp_digit)e, &key->e);
|
---|
4075 | #endif
|
---|
4076 | if (err == MP_OKAY) /* key->d = 1/e mod lcm(p-1, q-1) */
|
---|
4077 | err = mp_invmod(&key->e, &tmp3, &key->d);
|
---|
4078 | #ifdef WC_RSA_BLINDING
|
---|
4079 | /* Take off blinding from d and reset e */
|
---|
4080 | if (err == MP_OKAY)
|
---|
4081 | err = mp_mulmod(&key->d, &key->p, &tmp3, &key->d);
|
---|
4082 | if (err == MP_OKAY)
|
---|
4083 | err = mp_set_int(&key->e, (mp_digit)e);
|
---|
4084 | #endif
|
---|
4085 | if (err == MP_OKAY) /* key->n = pq */
|
---|
4086 | err = mp_mul(&p, &q, &key->n);
|
---|
4087 | if (err == MP_OKAY) /* key->dP = d mod(p-1) */
|
---|
4088 | err = mp_mod(&key->d, &tmp1, &key->dP);
|
---|
4089 | if (err == MP_OKAY) /* key->dQ = d mod(q-1) */
|
---|
4090 | err = mp_mod(&key->d, &tmp2, &key->dQ);
|
---|
4091 | #ifdef WOLFSSL_MP_INVMOD_CONSTANT_TIME
|
---|
4092 | if (err == MP_OKAY) /* key->u = 1/q mod p */
|
---|
4093 | err = mp_invmod(&q, &p, &key->u);
|
---|
4094 | #else
|
---|
4095 | if (err == MP_OKAY)
|
---|
4096 | err = mp_sub_d(&p, 2, &tmp3);
|
---|
4097 | if (err == MP_OKAY) /* key->u = 1/q mod p = q^p-2 mod p */
|
---|
4098 | err = mp_exptmod(&q, &tmp3 , &p, &key->u);
|
---|
4099 | #endif
|
---|
4100 | if (err == MP_OKAY)
|
---|
4101 | err = mp_copy(&p, &key->p);
|
---|
4102 | if (err == MP_OKAY)
|
---|
4103 | err = mp_copy(&q, &key->q);
|
---|
4104 |
|
---|
4105 | #ifdef HAVE_WOLF_BIGINT
|
---|
4106 | /* make sure raw unsigned bin version is available */
|
---|
4107 | if (err == MP_OKAY)
|
---|
4108 | err = wc_mp_to_bigint(&key->n, &key->n.raw);
|
---|
4109 | if (err == MP_OKAY)
|
---|
4110 | err = wc_mp_to_bigint(&key->e, &key->e.raw);
|
---|
4111 | if (err == MP_OKAY)
|
---|
4112 | err = wc_mp_to_bigint(&key->d, &key->d.raw);
|
---|
4113 | if (err == MP_OKAY)
|
---|
4114 | err = wc_mp_to_bigint(&key->p, &key->p.raw);
|
---|
4115 | if (err == MP_OKAY)
|
---|
4116 | err = wc_mp_to_bigint(&key->q, &key->q.raw);
|
---|
4117 | if (err == MP_OKAY)
|
---|
4118 | err = wc_mp_to_bigint(&key->dP, &key->dP.raw);
|
---|
4119 | if (err == MP_OKAY)
|
---|
4120 | err = wc_mp_to_bigint(&key->dQ, &key->dQ.raw);
|
---|
4121 | if (err == MP_OKAY)
|
---|
4122 | err = wc_mp_to_bigint(&key->u, &key->u.raw);
|
---|
4123 | #endif
|
---|
4124 |
|
---|
4125 | if (err == MP_OKAY)
|
---|
4126 | key->type = RSA_PRIVATE;
|
---|
4127 |
|
---|
4128 | mp_clear(&tmp1);
|
---|
4129 | mp_clear(&tmp2);
|
---|
4130 | mp_clear(&tmp3);
|
---|
4131 | mp_clear(&p);
|
---|
4132 | mp_clear(&q);
|
---|
4133 |
|
---|
4134 | #if defined(WOLFSSL_KEY_GEN) && !defined(WOLFSSL_NO_RSA_KEY_CHECK)
|
---|
4135 | /* Perform the pair-wise consistency test on the new key. */
|
---|
4136 | if (err == 0)
|
---|
4137 | err = wc_CheckRsaKey(key);
|
---|
4138 | #endif
|
---|
4139 |
|
---|
4140 | if (err != 0) {
|
---|
4141 | wc_FreeRsaKey(key);
|
---|
4142 | return err;
|
---|
4143 | }
|
---|
4144 |
|
---|
4145 | #if defined(WOLFSSL_XILINX_CRYPT) || defined(WOLFSSL_CRYPTOCELL)
|
---|
4146 | if (wc_InitRsaHw(key) != 0) {
|
---|
4147 | return BAD_STATE_E;
|
---|
4148 | }
|
---|
4149 | #endif
|
---|
4150 | return 0;
|
---|
4151 | #else
|
---|
4152 | return NOT_COMPILED_IN;
|
---|
4153 | #endif
|
---|
4154 | }
|
---|
4155 | #endif /* !FIPS || FIPS_VER >= 2 */
|
---|
4156 | #endif /* WOLFSSL_KEY_GEN */
|
---|
4157 |
|
---|
4158 |
|
---|
4159 | #ifdef WC_RSA_BLINDING
|
---|
4160 | int wc_RsaSetRNG(RsaKey* key, WC_RNG* rng)
|
---|
4161 | {
|
---|
4162 | if (key == NULL)
|
---|
4163 | return BAD_FUNC_ARG;
|
---|
4164 |
|
---|
4165 | key->rng = rng;
|
---|
4166 |
|
---|
4167 | return 0;
|
---|
4168 | }
|
---|
4169 | #endif /* WC_RSA_BLINDING */
|
---|
4170 |
|
---|
4171 | #ifdef WC_RSA_NONBLOCK
|
---|
4172 | int wc_RsaSetNonBlock(RsaKey* key, RsaNb* nb)
|
---|
4173 | {
|
---|
4174 | if (key == NULL)
|
---|
4175 | return BAD_FUNC_ARG;
|
---|
4176 |
|
---|
4177 | if (nb) {
|
---|
4178 | XMEMSET(nb, 0, sizeof(RsaNb));
|
---|
4179 | }
|
---|
4180 |
|
---|
4181 | /* Allow nb == NULL to clear non-block mode */
|
---|
4182 | key->nb = nb;
|
---|
4183 |
|
---|
4184 | return 0;
|
---|
4185 | }
|
---|
4186 | #ifdef WC_RSA_NONBLOCK_TIME
|
---|
4187 | int wc_RsaSetNonBlockTime(RsaKey* key, word32 maxBlockUs, word32 cpuMHz)
|
---|
4188 | {
|
---|
4189 | if (key == NULL || key->nb == NULL) {
|
---|
4190 | return BAD_FUNC_ARG;
|
---|
4191 | }
|
---|
4192 |
|
---|
4193 | /* calculate maximum number of instructions to block */
|
---|
4194 | key->nb->exptmod.maxBlockInst = cpuMHz * maxBlockUs;
|
---|
4195 |
|
---|
4196 | return 0;
|
---|
4197 | }
|
---|
4198 | #endif /* WC_RSA_NONBLOCK_TIME */
|
---|
4199 | #endif /* WC_RSA_NONBLOCK */
|
---|
4200 |
|
---|
4201 | #endif /* NO_RSA */
|
---|