1 /*
2 * Copyright 2019-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 /*
11 * RSA low level APIs are deprecated for public use, but still ok for
12 * internal use.
13 */
14 #include "internal/deprecated.h"
15
16 #include <openssl/crypto.h>
17 #include <openssl/evp.h>
18 #include <openssl/core_dispatch.h>
19 #include <openssl/core_names.h>
20 #include <openssl/rsa.h>
21 #include <openssl/params.h>
22 #include <openssl/err.h>
23 #include <openssl/proverr.h>
24 /* Just for SSL_MAX_MASTER_KEY_LENGTH */
25 #include <openssl/prov_ssl.h>
26 #include "internal/constant_time.h"
27 #include "internal/sizes.h"
28 #include "crypto/rsa.h"
29 #include "prov/provider_ctx.h"
30 #include "prov/implementations.h"
31 #include "prov/providercommon.h"
32 #include "prov/securitycheck.h"
33 #include <stdlib.h>
34
35 static OSSL_FUNC_asym_cipher_newctx_fn rsa_newctx;
36 static OSSL_FUNC_asym_cipher_encrypt_init_fn rsa_encrypt_init;
37 static OSSL_FUNC_asym_cipher_encrypt_fn rsa_encrypt;
38 static OSSL_FUNC_asym_cipher_decrypt_init_fn rsa_decrypt_init;
39 static OSSL_FUNC_asym_cipher_decrypt_fn rsa_decrypt;
40 static OSSL_FUNC_asym_cipher_freectx_fn rsa_freectx;
41 static OSSL_FUNC_asym_cipher_dupctx_fn rsa_dupctx;
42 static OSSL_FUNC_asym_cipher_get_ctx_params_fn rsa_get_ctx_params;
43 static OSSL_FUNC_asym_cipher_gettable_ctx_params_fn rsa_gettable_ctx_params;
44 static OSSL_FUNC_asym_cipher_set_ctx_params_fn rsa_set_ctx_params;
45 static OSSL_FUNC_asym_cipher_settable_ctx_params_fn rsa_settable_ctx_params;
46
47 static OSSL_ITEM padding_item[] = {
48 { RSA_PKCS1_PADDING, OSSL_PKEY_RSA_PAD_MODE_PKCSV15 },
49 { RSA_NO_PADDING, OSSL_PKEY_RSA_PAD_MODE_NONE },
50 { RSA_PKCS1_OAEP_PADDING, OSSL_PKEY_RSA_PAD_MODE_OAEP }, /* Correct spelling first */
51 { RSA_PKCS1_OAEP_PADDING, "oeap" },
52 { 0, NULL }
53 };
54
55 /*
56 * What's passed as an actual key is defined by the KEYMGMT interface.
57 * We happen to know that our KEYMGMT simply passes RSA structures, so
58 * we use that here too.
59 */
60
61 typedef struct {
62 OSSL_LIB_CTX *libctx;
63 RSA *rsa;
64 int pad_mode;
65 int operation;
66 /* OAEP message digest */
67 EVP_MD *oaep_md;
68 /* message digest for MGF1 */
69 EVP_MD *mgf1_md;
70 /* OAEP label */
71 unsigned char *oaep_label;
72 size_t oaep_labellen;
73 /* TLS padding */
74 unsigned int client_version;
75 unsigned int alt_version;
76 /* PKCS#1 v1.5 decryption mode */
77 unsigned int implicit_rejection;
78 OSSL_FIPS_IND_DECLARE
79 } PROV_RSA_CTX;
80
rsa_newctx(void * provctx)81 static void *rsa_newctx(void *provctx)
82 {
83 PROV_RSA_CTX *prsactx;
84
85 if (!ossl_prov_is_running())
86 return NULL;
87 prsactx = OPENSSL_zalloc(sizeof(PROV_RSA_CTX));
88 if (prsactx == NULL)
89 return NULL;
90 prsactx->libctx = PROV_LIBCTX_OF(provctx);
91 OSSL_FIPS_IND_INIT(prsactx)
92
93 return prsactx;
94 }
95
rsa_init(void * vprsactx,void * vrsa,const OSSL_PARAM params[],int operation,const char * desc)96 static int rsa_init(void *vprsactx, void *vrsa, const OSSL_PARAM params[],
97 int operation, const char *desc)
98 {
99 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
100 int protect = 0;
101
102 if (!ossl_prov_is_running() || prsactx == NULL || vrsa == NULL)
103 return 0;
104
105 if (!ossl_rsa_key_op_get_protect(vrsa, operation, &protect))
106 return 0;
107 if (!RSA_up_ref(vrsa))
108 return 0;
109 RSA_free(prsactx->rsa);
110 prsactx->rsa = vrsa;
111 prsactx->operation = operation;
112 prsactx->implicit_rejection = 1;
113
114 switch (RSA_test_flags(prsactx->rsa, RSA_FLAG_TYPE_MASK)) {
115 case RSA_FLAG_TYPE_RSA:
116 prsactx->pad_mode = RSA_PKCS1_PADDING;
117 break;
118 default:
119 /* This should not happen due to the check above */
120 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
121 return 0;
122 }
123
124 OSSL_FIPS_IND_SET_APPROVED(prsactx)
125 if (!rsa_set_ctx_params(prsactx, params))
126 return 0;
127 #ifdef FIPS_MODULE
128 if (!ossl_fips_ind_rsa_key_check(OSSL_FIPS_IND_GET(prsactx),
129 OSSL_FIPS_IND_SETTABLE0, prsactx->libctx,
130 prsactx->rsa, desc, protect))
131 return 0;
132 #endif
133 return 1;
134 }
135
rsa_encrypt_init(void * vprsactx,void * vrsa,const OSSL_PARAM params[])136 static int rsa_encrypt_init(void *vprsactx, void *vrsa,
137 const OSSL_PARAM params[])
138 {
139 return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_ENCRYPT,
140 "RSA Encrypt Init");
141 }
142
rsa_decrypt_init(void * vprsactx,void * vrsa,const OSSL_PARAM params[])143 static int rsa_decrypt_init(void *vprsactx, void *vrsa,
144 const OSSL_PARAM params[])
145 {
146 return rsa_init(vprsactx, vrsa, params, EVP_PKEY_OP_DECRYPT,
147 "RSA Decrypt Init");
148 }
149
rsa_encrypt(void * vprsactx,unsigned char * out,size_t * outlen,size_t outsize,const unsigned char * in,size_t inlen)150 static int rsa_encrypt(void *vprsactx, unsigned char *out, size_t *outlen,
151 size_t outsize, const unsigned char *in, size_t inlen)
152 {
153 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
154 int ret;
155
156 if (!ossl_prov_is_running())
157 return 0;
158
159 #ifdef FIPS_MODULE
160 if ((prsactx->pad_mode == RSA_PKCS1_PADDING
161 || prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING)
162 && !OSSL_FIPS_IND_ON_UNAPPROVED(prsactx, OSSL_FIPS_IND_SETTABLE1,
163 prsactx->libctx, "RSA Encrypt",
164 "PKCS#1 v1.5 padding",
165 ossl_fips_config_rsa_pkcs15_padding_disabled)) {
166 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_PADDING_MODE);
167 return 0;
168 }
169 #endif
170
171 if (out == NULL) {
172 size_t len = RSA_size(prsactx->rsa);
173
174 if (len == 0) {
175 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
176 return 0;
177 }
178 *outlen = len;
179 return 1;
180 }
181
182 if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
183 int rsasize = RSA_size(prsactx->rsa);
184 unsigned char *tbuf;
185
186 if ((tbuf = OPENSSL_malloc(rsasize)) == NULL)
187 return 0;
188 if (prsactx->oaep_md == NULL) {
189 prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
190 if (prsactx->oaep_md == NULL) {
191 OPENSSL_free(tbuf);
192 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
193 return 0;
194 }
195 }
196 ret =
197 ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(prsactx->libctx, tbuf,
198 rsasize, in, inlen,
199 prsactx->oaep_label,
200 prsactx->oaep_labellen,
201 prsactx->oaep_md,
202 prsactx->mgf1_md);
203
204 if (!ret) {
205 OPENSSL_free(tbuf);
206 return 0;
207 }
208 ret = RSA_public_encrypt(rsasize, tbuf, out, prsactx->rsa,
209 RSA_NO_PADDING);
210 OPENSSL_free(tbuf);
211 } else {
212 ret = RSA_public_encrypt(inlen, in, out, prsactx->rsa,
213 prsactx->pad_mode);
214 }
215 /* A ret value of 0 is not an error */
216 if (ret < 0)
217 return ret;
218 *outlen = ret;
219 return 1;
220 }
221
rsa_decrypt(void * vprsactx,unsigned char * out,size_t * outlen,size_t outsize,const unsigned char * in,size_t inlen)222 static int rsa_decrypt(void *vprsactx, unsigned char *out, size_t *outlen,
223 size_t outsize, const unsigned char *in, size_t inlen)
224 {
225 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
226 int ret;
227 int pad_mode;
228 size_t len = RSA_size(prsactx->rsa);
229
230 if (!ossl_prov_is_running())
231 return 0;
232
233 if (prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
234 if (out == NULL) {
235 *outlen = SSL_MAX_MASTER_KEY_LENGTH;
236 return 1;
237 }
238 if (outsize < SSL_MAX_MASTER_KEY_LENGTH) {
239 ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
240 return 0;
241 }
242 } else {
243 if (out == NULL) {
244 if (len == 0) {
245 ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY);
246 return 0;
247 }
248 *outlen = len;
249 return 1;
250 }
251
252 if (outsize < len) {
253 ERR_raise(ERR_LIB_PROV, PROV_R_BAD_LENGTH);
254 return 0;
255 }
256 }
257
258 if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING
259 || prsactx->pad_mode == RSA_PKCS1_WITH_TLS_PADDING) {
260 unsigned char *tbuf;
261
262 if ((tbuf = OPENSSL_malloc(len)) == NULL)
263 return 0;
264 ret = RSA_private_decrypt(inlen, in, tbuf, prsactx->rsa,
265 RSA_NO_PADDING);
266 /*
267 * With no padding then, on success ret should be len, otherwise an
268 * error occurred (non-constant time)
269 */
270 if (ret != (int)len) {
271 OPENSSL_free(tbuf);
272 ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_DECRYPT);
273 return 0;
274 }
275 if (prsactx->pad_mode == RSA_PKCS1_OAEP_PADDING) {
276 if (prsactx->oaep_md == NULL) {
277 prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA-1", NULL);
278 if (prsactx->oaep_md == NULL) {
279 OPENSSL_free(tbuf);
280 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
281 return 0;
282 }
283 }
284 ret = RSA_padding_check_PKCS1_OAEP_mgf1(out, outsize, tbuf,
285 len, len,
286 prsactx->oaep_label,
287 prsactx->oaep_labellen,
288 prsactx->oaep_md,
289 prsactx->mgf1_md);
290 } else {
291 /* RSA_PKCS1_WITH_TLS_PADDING */
292 if (prsactx->client_version <= 0) {
293 ERR_raise(ERR_LIB_PROV, PROV_R_BAD_TLS_CLIENT_VERSION);
294 OPENSSL_free(tbuf);
295 return 0;
296 }
297 ret = ossl_rsa_padding_check_PKCS1_type_2_TLS(
298 prsactx->libctx, out, outsize, tbuf, len,
299 prsactx->client_version, prsactx->alt_version);
300 }
301 OPENSSL_free(tbuf);
302 } else {
303 if ((prsactx->implicit_rejection == 0) &&
304 (prsactx->pad_mode == RSA_PKCS1_PADDING))
305 pad_mode = RSA_PKCS1_NO_IMPLICIT_REJECT_PADDING;
306 else
307 pad_mode = prsactx->pad_mode;
308 ret = RSA_private_decrypt(inlen, in, out, prsactx->rsa, pad_mode);
309 }
310 *outlen = constant_time_select_s(constant_time_msb_s(ret), *outlen, ret);
311 ret = constant_time_select_int(constant_time_msb(ret), 0, 1);
312 return ret;
313 }
314
rsa_freectx(void * vprsactx)315 static void rsa_freectx(void *vprsactx)
316 {
317 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
318
319 RSA_free(prsactx->rsa);
320
321 EVP_MD_free(prsactx->oaep_md);
322 EVP_MD_free(prsactx->mgf1_md);
323 OPENSSL_free(prsactx->oaep_label);
324
325 OPENSSL_free(prsactx);
326 }
327
rsa_dupctx(void * vprsactx)328 static void *rsa_dupctx(void *vprsactx)
329 {
330 PROV_RSA_CTX *srcctx = (PROV_RSA_CTX *)vprsactx;
331 PROV_RSA_CTX *dstctx;
332
333 if (!ossl_prov_is_running())
334 return NULL;
335
336 dstctx = OPENSSL_zalloc(sizeof(*srcctx));
337 if (dstctx == NULL)
338 return NULL;
339
340 *dstctx = *srcctx;
341 if (dstctx->rsa != NULL && !RSA_up_ref(dstctx->rsa)) {
342 OPENSSL_free(dstctx);
343 return NULL;
344 }
345
346 if (dstctx->oaep_md != NULL && !EVP_MD_up_ref(dstctx->oaep_md)) {
347 RSA_free(dstctx->rsa);
348 OPENSSL_free(dstctx);
349 return NULL;
350 }
351
352 if (dstctx->mgf1_md != NULL && !EVP_MD_up_ref(dstctx->mgf1_md)) {
353 RSA_free(dstctx->rsa);
354 EVP_MD_free(dstctx->oaep_md);
355 OPENSSL_free(dstctx);
356 return NULL;
357 }
358
359 return dstctx;
360 }
361
rsa_get_ctx_params(void * vprsactx,OSSL_PARAM * params)362 static int rsa_get_ctx_params(void *vprsactx, OSSL_PARAM *params)
363 {
364 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
365 OSSL_PARAM *p;
366
367 if (prsactx == NULL)
368 return 0;
369
370 p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
371 if (p != NULL)
372 switch (p->data_type) {
373 case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
374 if (!OSSL_PARAM_set_int(p, prsactx->pad_mode))
375 return 0;
376 break;
377 case OSSL_PARAM_UTF8_STRING:
378 {
379 int i;
380 const char *word = NULL;
381
382 for (i = 0; padding_item[i].id != 0; i++) {
383 if (prsactx->pad_mode == (int)padding_item[i].id) {
384 word = padding_item[i].ptr;
385 break;
386 }
387 }
388
389 if (word != NULL) {
390 if (!OSSL_PARAM_set_utf8_string(p, word))
391 return 0;
392 } else {
393 ERR_raise(ERR_LIB_PROV, ERR_R_INTERNAL_ERROR);
394 }
395 }
396 break;
397 default:
398 return 0;
399 }
400
401 p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
402 if (p != NULL && !OSSL_PARAM_set_utf8_string(p, prsactx->oaep_md == NULL
403 ? ""
404 : EVP_MD_get0_name(prsactx->oaep_md)))
405 return 0;
406
407 p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
408 if (p != NULL) {
409 EVP_MD *mgf1_md = prsactx->mgf1_md == NULL ? prsactx->oaep_md
410 : prsactx->mgf1_md;
411
412 if (!OSSL_PARAM_set_utf8_string(p, mgf1_md == NULL
413 ? ""
414 : EVP_MD_get0_name(mgf1_md)))
415 return 0;
416 }
417
418 p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
419 if (p != NULL &&
420 !OSSL_PARAM_set_octet_ptr(p, prsactx->oaep_label,
421 prsactx->oaep_labellen))
422 return 0;
423
424 p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
425 if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->client_version))
426 return 0;
427
428 p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
429 if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->alt_version))
430 return 0;
431
432 p = OSSL_PARAM_locate(params, OSSL_ASYM_CIPHER_PARAM_IMPLICIT_REJECTION);
433 if (p != NULL && !OSSL_PARAM_set_uint(p, prsactx->implicit_rejection))
434 return 0;
435 if (!OSSL_FIPS_IND_GET_CTX_PARAM(prsactx, params))
436 return 0;
437 return 1;
438 }
439
440 static const OSSL_PARAM known_gettable_ctx_params[] = {
441 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
442 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
443 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
444 OSSL_PARAM_DEFN(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, OSSL_PARAM_OCTET_PTR,
445 NULL, 0),
446 OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
447 OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
448 OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_IMPLICIT_REJECTION, NULL),
449 OSSL_FIPS_IND_GETTABLE_CTX_PARAM()
450 OSSL_PARAM_END
451 };
452
rsa_gettable_ctx_params(ossl_unused void * vprsactx,ossl_unused void * provctx)453 static const OSSL_PARAM *rsa_gettable_ctx_params(ossl_unused void *vprsactx,
454 ossl_unused void *provctx)
455 {
456 return known_gettable_ctx_params;
457 }
458
rsa_set_ctx_params(void * vprsactx,const OSSL_PARAM params[])459 static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
460 {
461 PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
462 const OSSL_PARAM *p;
463 char mdname[OSSL_MAX_NAME_SIZE];
464 char mdprops[OSSL_MAX_PROPQUERY_SIZE] = { '\0' };
465 char *str = NULL;
466
467 if (prsactx == NULL)
468 return 0;
469 if (ossl_param_is_empty(params))
470 return 1;
471
472 if (!OSSL_FIPS_IND_SET_CTX_PARAM(prsactx, OSSL_FIPS_IND_SETTABLE0, params,
473 OSSL_ASYM_CIPHER_PARAM_FIPS_KEY_CHECK))
474 return 0;
475 if (!OSSL_FIPS_IND_SET_CTX_PARAM(prsactx, OSSL_FIPS_IND_SETTABLE1, params,
476 OSSL_ASYM_CIPHER_PARAM_FIPS_RSA_PKCS15_PAD_DISABLED))
477 return 0;
478
479 p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST);
480 if (p != NULL) {
481 str = mdname;
482 if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
483 return 0;
484
485 p = OSSL_PARAM_locate_const(params,
486 OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS);
487 if (p != NULL) {
488 str = mdprops;
489 if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
490 return 0;
491 }
492
493 EVP_MD_free(prsactx->oaep_md);
494 prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, mdname, mdprops);
495
496 if (prsactx->oaep_md == NULL)
497 return 0;
498 }
499
500 p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_PAD_MODE);
501 if (p != NULL) {
502 int pad_mode = 0;
503
504 switch (p->data_type) {
505 case OSSL_PARAM_INTEGER: /* Support for legacy pad mode number */
506 if (!OSSL_PARAM_get_int(p, &pad_mode))
507 return 0;
508 break;
509 case OSSL_PARAM_UTF8_STRING:
510 {
511 int i;
512
513 if (p->data == NULL)
514 return 0;
515
516 for (i = 0; padding_item[i].id != 0; i++) {
517 if (strcmp(p->data, padding_item[i].ptr) == 0) {
518 pad_mode = padding_item[i].id;
519 break;
520 }
521 }
522 }
523 break;
524 default:
525 return 0;
526 }
527
528 /*
529 * PSS padding is for signatures only so is not compatible with
530 * asymmetric cipher use.
531 */
532 if (pad_mode == RSA_PKCS1_PSS_PADDING)
533 return 0;
534 if (pad_mode == RSA_PKCS1_OAEP_PADDING && prsactx->oaep_md == NULL) {
535 prsactx->oaep_md = EVP_MD_fetch(prsactx->libctx, "SHA1", mdprops);
536 if (prsactx->oaep_md == NULL)
537 return 0;
538 }
539 prsactx->pad_mode = pad_mode;
540 }
541
542 p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST);
543 if (p != NULL) {
544 str = mdname;
545 if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdname)))
546 return 0;
547
548 p = OSSL_PARAM_locate_const(params,
549 OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS);
550 if (p != NULL) {
551 str = mdprops;
552 if (!OSSL_PARAM_get_utf8_string(p, &str, sizeof(mdprops)))
553 return 0;
554 } else {
555 str = NULL;
556 }
557
558 EVP_MD_free(prsactx->mgf1_md);
559 prsactx->mgf1_md = EVP_MD_fetch(prsactx->libctx, mdname, str);
560
561 if (prsactx->mgf1_md == NULL)
562 return 0;
563 }
564
565 p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL);
566 if (p != NULL) {
567 void *tmp_label = NULL;
568 size_t tmp_labellen;
569
570 if (!OSSL_PARAM_get_octet_string(p, &tmp_label, 0, &tmp_labellen))
571 return 0;
572 OPENSSL_free(prsactx->oaep_label);
573 prsactx->oaep_label = (unsigned char *)tmp_label;
574 prsactx->oaep_labellen = tmp_labellen;
575 }
576
577 p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
578 if (p != NULL) {
579 unsigned int client_version;
580
581 if (!OSSL_PARAM_get_uint(p, &client_version))
582 return 0;
583 prsactx->client_version = client_version;
584 }
585
586 p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION);
587 if (p != NULL) {
588 unsigned int alt_version;
589
590 if (!OSSL_PARAM_get_uint(p, &alt_version))
591 return 0;
592 prsactx->alt_version = alt_version;
593 }
594 p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_IMPLICIT_REJECTION);
595 if (p != NULL) {
596 unsigned int implicit_rejection;
597
598 if (!OSSL_PARAM_get_uint(p, &implicit_rejection))
599 return 0;
600 prsactx->implicit_rejection = implicit_rejection;
601 }
602 return 1;
603 }
604
605 static const OSSL_PARAM known_settable_ctx_params[] = {
606 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST, NULL, 0),
607 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS, NULL, 0),
608 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, NULL, 0),
609 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST, NULL, 0),
610 OSSL_PARAM_utf8_string(OSSL_ASYM_CIPHER_PARAM_MGF1_DIGEST_PROPS, NULL, 0),
611 OSSL_PARAM_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, NULL, 0),
612 OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
613 OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
614 OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_IMPLICIT_REJECTION, NULL),
615 OSSL_FIPS_IND_SETTABLE_CTX_PARAM(OSSL_ASYM_CIPHER_PARAM_FIPS_KEY_CHECK)
616 OSSL_FIPS_IND_SETTABLE_CTX_PARAM(OSSL_ASYM_CIPHER_PARAM_FIPS_RSA_PKCS15_PAD_DISABLED)
617 OSSL_PARAM_END
618 };
619
rsa_settable_ctx_params(ossl_unused void * vprsactx,ossl_unused void * provctx)620 static const OSSL_PARAM *rsa_settable_ctx_params(ossl_unused void *vprsactx,
621 ossl_unused void *provctx)
622 {
623 return known_settable_ctx_params;
624 }
625
626 const OSSL_DISPATCH ossl_rsa_asym_cipher_functions[] = {
627 { OSSL_FUNC_ASYM_CIPHER_NEWCTX, (void (*)(void))rsa_newctx },
628 { OSSL_FUNC_ASYM_CIPHER_ENCRYPT_INIT, (void (*)(void))rsa_encrypt_init },
629 { OSSL_FUNC_ASYM_CIPHER_ENCRYPT, (void (*)(void))rsa_encrypt },
630 { OSSL_FUNC_ASYM_CIPHER_DECRYPT_INIT, (void (*)(void))rsa_decrypt_init },
631 { OSSL_FUNC_ASYM_CIPHER_DECRYPT, (void (*)(void))rsa_decrypt },
632 { OSSL_FUNC_ASYM_CIPHER_FREECTX, (void (*)(void))rsa_freectx },
633 { OSSL_FUNC_ASYM_CIPHER_DUPCTX, (void (*)(void))rsa_dupctx },
634 { OSSL_FUNC_ASYM_CIPHER_GET_CTX_PARAMS,
635 (void (*)(void))rsa_get_ctx_params },
636 { OSSL_FUNC_ASYM_CIPHER_GETTABLE_CTX_PARAMS,
637 (void (*)(void))rsa_gettable_ctx_params },
638 { OSSL_FUNC_ASYM_CIPHER_SET_CTX_PARAMS,
639 (void (*)(void))rsa_set_ctx_params },
640 { OSSL_FUNC_ASYM_CIPHER_SETTABLE_CTX_PARAMS,
641 (void (*)(void))rsa_settable_ctx_params },
642 OSSL_DISPATCH_END
643 };
644