rsa_backend.c 19 KB

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  1. /*
  2. * Copyright 2020-2022 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. * RSA low level APIs are deprecated for public use, but still ok for
  11. * internal use.
  12. */
  13. #include "internal/deprecated.h"
  14. #include <string.h>
  15. #include <openssl/core_names.h>
  16. #include <openssl/params.h>
  17. #include <openssl/err.h>
  18. #include <openssl/evp.h>
  19. #ifndef FIPS_MODULE
  20. # include <openssl/x509.h>
  21. # include "crypto/asn1.h"
  22. #endif
  23. #include "internal/sizes.h"
  24. #include "internal/param_build_set.h"
  25. #include "crypto/rsa.h"
  26. #include "rsa_local.h"
  27. /*
  28. * The intention with the "backend" source file is to offer backend support
  29. * for legacy backends (EVP_PKEY_ASN1_METHOD and EVP_PKEY_METHOD) and provider
  30. * implementations alike.
  31. */
  32. DEFINE_STACK_OF(BIGNUM)
  33. static int collect_numbers(STACK_OF(BIGNUM) *numbers,
  34. const OSSL_PARAM params[], const char *names[])
  35. {
  36. const OSSL_PARAM *p = NULL;
  37. int i;
  38. if (numbers == NULL)
  39. return 0;
  40. for (i = 0; names[i] != NULL; i++) {
  41. p = OSSL_PARAM_locate_const(params, names[i]);
  42. if (p != NULL) {
  43. BIGNUM *tmp = NULL;
  44. if (!OSSL_PARAM_get_BN(p, &tmp))
  45. return 0;
  46. if (sk_BIGNUM_push(numbers, tmp) == 0) {
  47. BN_clear_free(tmp);
  48. return 0;
  49. }
  50. }
  51. }
  52. return 1;
  53. }
  54. int ossl_rsa_fromdata(RSA *rsa, const OSSL_PARAM params[], int include_private)
  55. {
  56. const OSSL_PARAM *param_n, *param_e, *param_d = NULL;
  57. BIGNUM *n = NULL, *e = NULL, *d = NULL;
  58. STACK_OF(BIGNUM) *factors = NULL, *exps = NULL, *coeffs = NULL;
  59. int is_private = 0;
  60. if (rsa == NULL)
  61. return 0;
  62. param_n = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_N);
  63. param_e = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_E);
  64. if (include_private)
  65. param_d = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_D);
  66. if ((param_n != NULL && !OSSL_PARAM_get_BN(param_n, &n))
  67. || (param_e != NULL && !OSSL_PARAM_get_BN(param_e, &e))
  68. || (param_d != NULL && !OSSL_PARAM_get_BN(param_d, &d)))
  69. goto err;
  70. is_private = (d != NULL);
  71. if (!RSA_set0_key(rsa, n, e, d))
  72. goto err;
  73. n = e = d = NULL;
  74. if (is_private) {
  75. if (!collect_numbers(factors = sk_BIGNUM_new_null(), params,
  76. ossl_rsa_mp_factor_names)
  77. || !collect_numbers(exps = sk_BIGNUM_new_null(), params,
  78. ossl_rsa_mp_exp_names)
  79. || !collect_numbers(coeffs = sk_BIGNUM_new_null(), params,
  80. ossl_rsa_mp_coeff_names))
  81. goto err;
  82. /* It's ok if this private key just has n, e and d */
  83. if (sk_BIGNUM_num(factors) != 0
  84. && !ossl_rsa_set0_all_params(rsa, factors, exps, coeffs))
  85. goto err;
  86. }
  87. sk_BIGNUM_free(factors);
  88. sk_BIGNUM_free(exps);
  89. sk_BIGNUM_free(coeffs);
  90. return 1;
  91. err:
  92. BN_free(n);
  93. BN_free(e);
  94. BN_free(d);
  95. sk_BIGNUM_pop_free(factors, BN_free);
  96. sk_BIGNUM_pop_free(exps, BN_free);
  97. sk_BIGNUM_pop_free(coeffs, BN_free);
  98. return 0;
  99. }
  100. DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
  101. int ossl_rsa_todata(RSA *rsa, OSSL_PARAM_BLD *bld, OSSL_PARAM params[],
  102. int include_private)
  103. {
  104. int ret = 0;
  105. const BIGNUM *rsa_d = NULL, *rsa_n = NULL, *rsa_e = NULL;
  106. STACK_OF(BIGNUM_const) *factors = sk_BIGNUM_const_new_null();
  107. STACK_OF(BIGNUM_const) *exps = sk_BIGNUM_const_new_null();
  108. STACK_OF(BIGNUM_const) *coeffs = sk_BIGNUM_const_new_null();
  109. if (rsa == NULL || factors == NULL || exps == NULL || coeffs == NULL)
  110. goto err;
  111. RSA_get0_key(rsa, &rsa_n, &rsa_e, &rsa_d);
  112. ossl_rsa_get0_all_params(rsa, factors, exps, coeffs);
  113. if (!ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_RSA_N, rsa_n)
  114. || !ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_RSA_E, rsa_e))
  115. goto err;
  116. /* Check private key data integrity */
  117. if (include_private && rsa_d != NULL) {
  118. if (!ossl_param_build_set_bn(bld, params, OSSL_PKEY_PARAM_RSA_D,
  119. rsa_d)
  120. || !ossl_param_build_set_multi_key_bn(bld, params,
  121. ossl_rsa_mp_factor_names,
  122. factors)
  123. || !ossl_param_build_set_multi_key_bn(bld, params,
  124. ossl_rsa_mp_exp_names, exps)
  125. || !ossl_param_build_set_multi_key_bn(bld, params,
  126. ossl_rsa_mp_coeff_names,
  127. coeffs))
  128. goto err;
  129. }
  130. #if defined(FIPS_MODULE) && !defined(OPENSSL_NO_ACVP_TESTS)
  131. /* The acvp test results are not meant for export so check for bld == NULL */
  132. if (bld == NULL)
  133. ossl_rsa_acvp_test_get_params(rsa, params);
  134. #endif
  135. ret = 1;
  136. err:
  137. sk_BIGNUM_const_free(factors);
  138. sk_BIGNUM_const_free(exps);
  139. sk_BIGNUM_const_free(coeffs);
  140. return ret;
  141. }
  142. int ossl_rsa_pss_params_30_todata(const RSA_PSS_PARAMS_30 *pss,
  143. OSSL_PARAM_BLD *bld, OSSL_PARAM params[])
  144. {
  145. if (!ossl_rsa_pss_params_30_is_unrestricted(pss)) {
  146. int hashalg_nid = ossl_rsa_pss_params_30_hashalg(pss);
  147. int maskgenalg_nid = ossl_rsa_pss_params_30_maskgenalg(pss);
  148. int maskgenhashalg_nid = ossl_rsa_pss_params_30_maskgenhashalg(pss);
  149. int saltlen = ossl_rsa_pss_params_30_saltlen(pss);
  150. int default_hashalg_nid = ossl_rsa_pss_params_30_hashalg(NULL);
  151. int default_maskgenalg_nid = ossl_rsa_pss_params_30_maskgenalg(NULL);
  152. int default_maskgenhashalg_nid =
  153. ossl_rsa_pss_params_30_maskgenhashalg(NULL);
  154. const char *mdname =
  155. (hashalg_nid == default_hashalg_nid
  156. ? NULL : ossl_rsa_oaeppss_nid2name(hashalg_nid));
  157. const char *mgfname =
  158. (maskgenalg_nid == default_maskgenalg_nid
  159. ? NULL : ossl_rsa_oaeppss_nid2name(maskgenalg_nid));
  160. const char *mgf1mdname =
  161. (maskgenhashalg_nid == default_maskgenhashalg_nid
  162. ? NULL : ossl_rsa_oaeppss_nid2name(maskgenhashalg_nid));
  163. const char *key_md = OSSL_PKEY_PARAM_RSA_DIGEST;
  164. const char *key_mgf = OSSL_PKEY_PARAM_RSA_MASKGENFUNC;
  165. const char *key_mgf1_md = OSSL_PKEY_PARAM_RSA_MGF1_DIGEST;
  166. const char *key_saltlen = OSSL_PKEY_PARAM_RSA_PSS_SALTLEN;
  167. /*
  168. * To ensure that the key isn't seen as unrestricted by the recipient,
  169. * we make sure that at least one PSS-related parameter is passed, even
  170. * if it has a default value; saltlen.
  171. */
  172. if ((mdname != NULL
  173. && !ossl_param_build_set_utf8_string(bld, params, key_md, mdname))
  174. || (mgfname != NULL
  175. && !ossl_param_build_set_utf8_string(bld, params,
  176. key_mgf, mgfname))
  177. || (mgf1mdname != NULL
  178. && !ossl_param_build_set_utf8_string(bld, params,
  179. key_mgf1_md, mgf1mdname))
  180. || (!ossl_param_build_set_int(bld, params, key_saltlen, saltlen)))
  181. return 0;
  182. }
  183. return 1;
  184. }
  185. int ossl_rsa_pss_params_30_fromdata(RSA_PSS_PARAMS_30 *pss_params,
  186. int *defaults_set,
  187. const OSSL_PARAM params[],
  188. OSSL_LIB_CTX *libctx)
  189. {
  190. const OSSL_PARAM *param_md, *param_mgf, *param_mgf1md, *param_saltlen;
  191. const OSSL_PARAM *param_propq;
  192. const char *propq = NULL;
  193. EVP_MD *md = NULL, *mgf1md = NULL;
  194. int saltlen;
  195. int ret = 0;
  196. if (pss_params == NULL)
  197. return 0;
  198. param_propq =
  199. OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_DIGEST_PROPS);
  200. param_md =
  201. OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_DIGEST);
  202. param_mgf =
  203. OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_MASKGENFUNC);
  204. param_mgf1md =
  205. OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_MGF1_DIGEST);
  206. param_saltlen =
  207. OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_RSA_PSS_SALTLEN);
  208. if (param_propq != NULL) {
  209. if (param_propq->data_type == OSSL_PARAM_UTF8_STRING)
  210. propq = param_propq->data;
  211. }
  212. /*
  213. * If we get any of the parameters, we know we have at least some
  214. * restrictions, so we start by setting default values, and let each
  215. * parameter override their specific restriction data.
  216. */
  217. if (!*defaults_set
  218. && (param_md != NULL || param_mgf != NULL || param_mgf1md != NULL
  219. || param_saltlen != NULL)) {
  220. if (!ossl_rsa_pss_params_30_set_defaults(pss_params))
  221. return 0;
  222. *defaults_set = 1;
  223. }
  224. if (param_mgf != NULL) {
  225. int default_maskgenalg_nid = ossl_rsa_pss_params_30_maskgenalg(NULL);
  226. const char *mgfname = NULL;
  227. if (param_mgf->data_type == OSSL_PARAM_UTF8_STRING)
  228. mgfname = param_mgf->data;
  229. else if (!OSSL_PARAM_get_utf8_ptr(param_mgf, &mgfname))
  230. return 0;
  231. if (OPENSSL_strcasecmp(param_mgf->data,
  232. ossl_rsa_mgf_nid2name(default_maskgenalg_nid)) != 0)
  233. return 0;
  234. }
  235. /*
  236. * We're only interested in the NIDs that correspond to the MDs, so the
  237. * exact propquery is unimportant in the EVP_MD_fetch() calls below.
  238. */
  239. if (param_md != NULL) {
  240. const char *mdname = NULL;
  241. if (param_md->data_type == OSSL_PARAM_UTF8_STRING)
  242. mdname = param_md->data;
  243. else if (!OSSL_PARAM_get_utf8_ptr(param_mgf, &mdname))
  244. goto err;
  245. if ((md = EVP_MD_fetch(libctx, mdname, propq)) == NULL
  246. || !ossl_rsa_pss_params_30_set_hashalg(pss_params,
  247. ossl_rsa_oaeppss_md2nid(md)))
  248. goto err;
  249. }
  250. if (param_mgf1md != NULL) {
  251. const char *mgf1mdname = NULL;
  252. if (param_mgf1md->data_type == OSSL_PARAM_UTF8_STRING)
  253. mgf1mdname = param_mgf1md->data;
  254. else if (!OSSL_PARAM_get_utf8_ptr(param_mgf, &mgf1mdname))
  255. goto err;
  256. if ((mgf1md = EVP_MD_fetch(libctx, mgf1mdname, propq)) == NULL
  257. || !ossl_rsa_pss_params_30_set_maskgenhashalg(
  258. pss_params, ossl_rsa_oaeppss_md2nid(mgf1md)))
  259. goto err;
  260. }
  261. if (param_saltlen != NULL) {
  262. if (!OSSL_PARAM_get_int(param_saltlen, &saltlen)
  263. || !ossl_rsa_pss_params_30_set_saltlen(pss_params, saltlen))
  264. goto err;
  265. }
  266. ret = 1;
  267. err:
  268. EVP_MD_free(md);
  269. EVP_MD_free(mgf1md);
  270. return ret;
  271. }
  272. int ossl_rsa_is_foreign(const RSA *rsa)
  273. {
  274. #ifndef FIPS_MODULE
  275. if (rsa->engine != NULL || RSA_get_method(rsa) != RSA_PKCS1_OpenSSL())
  276. return 1;
  277. #endif
  278. return 0;
  279. }
  280. static ossl_inline int rsa_bn_dup_check(BIGNUM **out, const BIGNUM *f)
  281. {
  282. if (f != NULL && (*out = BN_dup(f)) == NULL)
  283. return 0;
  284. return 1;
  285. }
  286. RSA *ossl_rsa_dup(const RSA *rsa, int selection)
  287. {
  288. RSA *dupkey = NULL;
  289. #ifndef FIPS_MODULE
  290. int pnum, i;
  291. #endif
  292. /* Do not try to duplicate foreign RSA keys */
  293. if (ossl_rsa_is_foreign(rsa))
  294. return NULL;
  295. if ((dupkey = ossl_rsa_new_with_ctx(rsa->libctx)) == NULL)
  296. return NULL;
  297. /* public key */
  298. if ((selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
  299. if (!rsa_bn_dup_check(&dupkey->n, rsa->n))
  300. goto err;
  301. if (!rsa_bn_dup_check(&dupkey->e, rsa->e))
  302. goto err;
  303. }
  304. if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
  305. /* private key */
  306. if (!rsa_bn_dup_check(&dupkey->d, rsa->d))
  307. goto err;
  308. /* factors and crt params */
  309. if (!rsa_bn_dup_check(&dupkey->p, rsa->p))
  310. goto err;
  311. if (!rsa_bn_dup_check(&dupkey->q, rsa->q))
  312. goto err;
  313. if (!rsa_bn_dup_check(&dupkey->dmp1, rsa->dmp1))
  314. goto err;
  315. if (!rsa_bn_dup_check(&dupkey->dmq1, rsa->dmq1))
  316. goto err;
  317. if (!rsa_bn_dup_check(&dupkey->iqmp, rsa->iqmp))
  318. goto err;
  319. }
  320. dupkey->version = rsa->version;
  321. dupkey->flags = rsa->flags;
  322. /* we always copy the PSS parameters regardless of selection */
  323. dupkey->pss_params = rsa->pss_params;
  324. #ifndef FIPS_MODULE
  325. /* multiprime */
  326. if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0
  327. && (pnum = sk_RSA_PRIME_INFO_num(rsa->prime_infos)) > 0) {
  328. dupkey->prime_infos = sk_RSA_PRIME_INFO_new_reserve(NULL, pnum);
  329. if (dupkey->prime_infos == NULL)
  330. goto err;
  331. for (i = 0; i < pnum; i++) {
  332. const RSA_PRIME_INFO *pinfo = NULL;
  333. RSA_PRIME_INFO *duppinfo = NULL;
  334. if ((duppinfo = OPENSSL_zalloc(sizeof(*duppinfo))) == NULL)
  335. goto err;
  336. /* push first so cleanup in error case works */
  337. (void)sk_RSA_PRIME_INFO_push(dupkey->prime_infos, duppinfo);
  338. pinfo = sk_RSA_PRIME_INFO_value(rsa->prime_infos, i);
  339. if (!rsa_bn_dup_check(&duppinfo->r, pinfo->r))
  340. goto err;
  341. if (!rsa_bn_dup_check(&duppinfo->d, pinfo->d))
  342. goto err;
  343. if (!rsa_bn_dup_check(&duppinfo->t, pinfo->t))
  344. goto err;
  345. }
  346. if (!ossl_rsa_multip_calc_product(dupkey))
  347. goto err;
  348. }
  349. if (rsa->pss != NULL) {
  350. dupkey->pss = RSA_PSS_PARAMS_dup(rsa->pss);
  351. if (rsa->pss->maskGenAlgorithm != NULL
  352. && dupkey->pss->maskGenAlgorithm == NULL) {
  353. dupkey->pss->maskHash = ossl_x509_algor_mgf1_decode(rsa->pss->maskGenAlgorithm);
  354. if (dupkey->pss->maskHash == NULL)
  355. goto err;
  356. }
  357. }
  358. if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_RSA,
  359. &dupkey->ex_data, &rsa->ex_data))
  360. goto err;
  361. #endif
  362. return dupkey;
  363. err:
  364. RSA_free(dupkey);
  365. return NULL;
  366. }
  367. #ifndef FIPS_MODULE
  368. RSA_PSS_PARAMS *ossl_rsa_pss_decode(const X509_ALGOR *alg)
  369. {
  370. RSA_PSS_PARAMS *pss;
  371. pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
  372. alg->parameter);
  373. if (pss == NULL)
  374. return NULL;
  375. if (pss->maskGenAlgorithm != NULL) {
  376. pss->maskHash = ossl_x509_algor_mgf1_decode(pss->maskGenAlgorithm);
  377. if (pss->maskHash == NULL) {
  378. RSA_PSS_PARAMS_free(pss);
  379. return NULL;
  380. }
  381. }
  382. return pss;
  383. }
  384. static int ossl_rsa_sync_to_pss_params_30(RSA *rsa)
  385. {
  386. const RSA_PSS_PARAMS *legacy_pss = NULL;
  387. RSA_PSS_PARAMS_30 *pss = NULL;
  388. if (rsa != NULL
  389. && (legacy_pss = RSA_get0_pss_params(rsa)) != NULL
  390. && (pss = ossl_rsa_get0_pss_params_30(rsa)) != NULL) {
  391. const EVP_MD *md = NULL, *mgf1md = NULL;
  392. int md_nid, mgf1md_nid, saltlen, trailerField;
  393. RSA_PSS_PARAMS_30 pss_params;
  394. /*
  395. * We don't care about the validity of the fields here, we just
  396. * want to synchronise values. Verifying here makes it impossible
  397. * to even read a key with invalid values, making it hard to test
  398. * a bad situation.
  399. *
  400. * Other routines use ossl_rsa_pss_get_param(), so the values will
  401. * be checked, eventually.
  402. */
  403. if (!ossl_rsa_pss_get_param_unverified(legacy_pss, &md, &mgf1md,
  404. &saltlen, &trailerField))
  405. return 0;
  406. md_nid = EVP_MD_get_type(md);
  407. mgf1md_nid = EVP_MD_get_type(mgf1md);
  408. if (!ossl_rsa_pss_params_30_set_defaults(&pss_params)
  409. || !ossl_rsa_pss_params_30_set_hashalg(&pss_params, md_nid)
  410. || !ossl_rsa_pss_params_30_set_maskgenhashalg(&pss_params,
  411. mgf1md_nid)
  412. || !ossl_rsa_pss_params_30_set_saltlen(&pss_params, saltlen)
  413. || !ossl_rsa_pss_params_30_set_trailerfield(&pss_params,
  414. trailerField))
  415. return 0;
  416. *pss = pss_params;
  417. }
  418. return 1;
  419. }
  420. int ossl_rsa_pss_get_param_unverified(const RSA_PSS_PARAMS *pss,
  421. const EVP_MD **pmd, const EVP_MD **pmgf1md,
  422. int *psaltlen, int *ptrailerField)
  423. {
  424. RSA_PSS_PARAMS_30 pss_params;
  425. /* Get the defaults from the ONE place */
  426. (void)ossl_rsa_pss_params_30_set_defaults(&pss_params);
  427. if (pss == NULL)
  428. return 0;
  429. *pmd = ossl_x509_algor_get_md(pss->hashAlgorithm);
  430. if (*pmd == NULL)
  431. return 0;
  432. *pmgf1md = ossl_x509_algor_get_md(pss->maskHash);
  433. if (*pmgf1md == NULL)
  434. return 0;
  435. if (pss->saltLength)
  436. *psaltlen = ASN1_INTEGER_get(pss->saltLength);
  437. else
  438. *psaltlen = ossl_rsa_pss_params_30_saltlen(&pss_params);
  439. if (pss->trailerField)
  440. *ptrailerField = ASN1_INTEGER_get(pss->trailerField);
  441. else
  442. *ptrailerField = ossl_rsa_pss_params_30_trailerfield(&pss_params);
  443. return 1;
  444. }
  445. int ossl_rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
  446. {
  447. RSA_PSS_PARAMS *pss;
  448. const ASN1_OBJECT *algoid;
  449. const void *algp;
  450. int algptype;
  451. X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
  452. if (OBJ_obj2nid(algoid) != EVP_PKEY_RSA_PSS)
  453. return 1;
  454. if (algptype == V_ASN1_UNDEF)
  455. return 1;
  456. if (algptype != V_ASN1_SEQUENCE) {
  457. ERR_raise(ERR_LIB_RSA, RSA_R_INVALID_PSS_PARAMETERS);
  458. return 0;
  459. }
  460. if ((pss = ossl_rsa_pss_decode(alg)) == NULL
  461. || !ossl_rsa_set0_pss_params(rsa, pss)) {
  462. RSA_PSS_PARAMS_free(pss);
  463. return 0;
  464. }
  465. if (!ossl_rsa_sync_to_pss_params_30(rsa))
  466. return 0;
  467. return 1;
  468. }
  469. RSA *ossl_rsa_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO *p8inf,
  470. OSSL_LIB_CTX *libctx, const char *propq)
  471. {
  472. const unsigned char *p;
  473. RSA *rsa;
  474. int pklen;
  475. const X509_ALGOR *alg;
  476. if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8inf))
  477. return 0;
  478. rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
  479. if (rsa == NULL) {
  480. ERR_raise(ERR_LIB_RSA, ERR_R_RSA_LIB);
  481. return NULL;
  482. }
  483. if (!ossl_rsa_param_decode(rsa, alg)) {
  484. RSA_free(rsa);
  485. return NULL;
  486. }
  487. RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
  488. switch (OBJ_obj2nid(alg->algorithm)) {
  489. case EVP_PKEY_RSA:
  490. RSA_set_flags(rsa, RSA_FLAG_TYPE_RSA);
  491. break;
  492. case EVP_PKEY_RSA_PSS:
  493. RSA_set_flags(rsa, RSA_FLAG_TYPE_RSASSAPSS);
  494. break;
  495. default:
  496. /* Leave the type bits zero */
  497. break;
  498. }
  499. return rsa;
  500. }
  501. #endif