crypto/rsa/rsa_ameth.c

   1 /*
   2  * Copyright 2006-2020 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 <stdio.h>
  17 #include "internal/cryptlib.h"
  18 #include <openssl/asn1t.h>
  19 #include <openssl/x509.h>
  20 #include <openssl/bn.h>
  21 #include <openssl/cms.h>
  22 #include <openssl/core_names.h>
  23 #include <openssl/param_build.h>
  24 #include "crypto/asn1.h"
  25 #include "crypto/evp.h"
  26 #include "crypto/rsa.h"
  27 #include "rsa_local.h"
  28
  29 #ifndef OPENSSL_NO_CMS
  30 static int rsa_cms_sign(CMS_SignerInfo *si);
  31 static int rsa_cms_verify(CMS_SignerInfo *si);
  32 static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
  33 static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
  34 #endif
  35
  36 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg);
  37
  38 /* Set any parameters associated with pkey */
  39 static int rsa_param_encode(const EVP_PKEY *pkey,
  40                             ASN1_STRING **pstr, int *pstrtype)
  41 {
  42     const RSA *rsa = pkey->pkey.rsa;
  43
  44     *pstr = NULL;
  45     /* If RSA it's just NULL type */
  46     if (RSA_test_flags(rsa, RSA_FLAG_TYPE_MASK) != RSA_FLAG_TYPE_RSASSAPSS) {
  47         *pstrtype = V_ASN1_NULL;
  48         return 1;
  49     }
  50     /* If no PSS parameters we omit parameters entirely */
  51     if (rsa->pss == NULL) {
  52         *pstrtype = V_ASN1_UNDEF;
  53         return 1;
  54     }
  55     /* Encode PSS parameters */
  56     if (ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr) == NULL)
  57         return 0;
  58
  59     *pstrtype = V_ASN1_SEQUENCE;
  60     return 1;
  61 }
  62 /* Decode any parameters and set them in RSA structure */
  63 static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
  64 {
  65     const ASN1_OBJECT *algoid;
  66     const void *algp;
  67     int algptype;
  68
  69     X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
  70     if (OBJ_obj2nid(algoid) != EVP_PKEY_RSA_PSS)
  71         return 1;
  72     if (algptype == V_ASN1_UNDEF)
  73         return 1;
  74     if (algptype != V_ASN1_SEQUENCE) {
  75         RSAerr(RSA_F_RSA_PARAM_DECODE, RSA_R_INVALID_PSS_PARAMETERS);
  76         return 0;
  77     }
  78     rsa->pss = rsa_pss_decode(alg);
  79     if (rsa->pss == NULL)
  80         return 0;
  81     return 1;
  82 }
  83
  84 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
  85 {
  86     unsigned char *penc = NULL;
  87     int penclen;
  88     ASN1_STRING *str;
  89     int strtype;
  90
  91     if (!rsa_param_encode(pkey, &str, &strtype))
  92         return 0;
  93     penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
  94     if (penclen <= 0)
  95         return 0;
  96     if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
  97                                strtype, str, penc, penclen))
  98         return 1;
  99
 100     OPENSSL_free(penc);
 101     return 0;
 102 }
 103
 104 static int rsa_pub_decode(EVP_PKEY *pkey, const X509_PUBKEY *pubkey)
 105 {
 106     const unsigned char *p;
 107     int pklen;
 108     X509_ALGOR *alg;
 109     RSA *rsa = NULL;
 110
 111     if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey))
 112         return 0;
 113     if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
 114         RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
 115         return 0;
 116     }
 117     if (!rsa_param_decode(rsa, alg)) {
 118         RSA_free(rsa);
 119         return 0;
 120     }
 121     if (!EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa)) {
 122         RSA_free(rsa);
 123         return 0;
 124     }
 125     return 1;
 126 }
 127
 128 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 129 {
 130     if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
 131         || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
 132         return 0;
 133     return 1;
 134 }
 135
 136 static int old_rsa_priv_decode(EVP_PKEY *pkey,
 137                                const unsigned char **pder, int derlen)
 138 {
 139     RSA *rsa;
 140
 141     if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
 142         RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
 143         return 0;
 144     }
 145     EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
 146     return 1;
 147 }
 148
 149 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 150 {
 151     return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
 152 }
 153
 154 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 155 {
 156     unsigned char *rk = NULL;
 157     int rklen;
 158     ASN1_STRING *str;
 159     int strtype;
 160
 161     if (!rsa_param_encode(pkey, &str, &strtype))
 162         return 0;
 163     rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
 164
 165     if (rklen <= 0) {
 166         RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 167         ASN1_STRING_free(str);
 168         return 0;
 169     }
 170
 171     if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
 172                          strtype, str, rk, rklen)) {
 173         RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 174         ASN1_STRING_free(str);
 175         return 0;
 176     }
 177
 178     return 1;
 179 }
 180
 181 static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
 182 {
 183     const unsigned char *p;
 184     RSA *rsa;
 185     int pklen;
 186     const X509_ALGOR *alg;
 187
 188     if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
 189         return 0;
 190     rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
 191     if (rsa == NULL) {
 192         RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
 193         return 0;
 194     }
 195     if (!rsa_param_decode(rsa, alg)) {
 196         RSA_free(rsa);
 197         return 0;
 198     }
 199
 200     RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
 201     switch (pkey->ameth->pkey_id) {
 202     case EVP_PKEY_RSA:
 203         RSA_set_flags(rsa, RSA_FLAG_TYPE_RSA);
 204         break;
 205     case EVP_PKEY_RSA_PSS:
 206         RSA_set_flags(rsa, RSA_FLAG_TYPE_RSASSAPSS);
 207         break;
 208     default:
 209         /* Leave the type bits zero */
 210         break;
 211     }
 212
 213     EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
 214     return 1;
 215 }
 216
 217 static int int_rsa_size(const EVP_PKEY *pkey)
 218 {
 219     return RSA_size(pkey->pkey.rsa);
 220 }
 221
 222 static int rsa_bits(const EVP_PKEY *pkey)
 223 {
 224     return BN_num_bits(pkey->pkey.rsa->n);
 225 }
 226
 227 static int rsa_security_bits(const EVP_PKEY *pkey)
 228 {
 229     return RSA_security_bits(pkey->pkey.rsa);
 230 }
 231
 232 static void int_rsa_free(EVP_PKEY *pkey)
 233 {
 234     RSA_free(pkey->pkey.rsa);
 235 }
 236
 237 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
 238 {
 239     if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
 240         return NULL;
 241     return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
 242                                      alg->parameter);
 243 }
 244
 245 static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
 246                                int indent)
 247 {
 248     int rv = 0;
 249     X509_ALGOR *maskHash = NULL;
 250
 251     if (!BIO_indent(bp, indent, 128))
 252         goto err;
 253     if (pss_key) {
 254         if (pss == NULL) {
 255             if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
 256                 return 0;
 257             return 1;
 258         } else {
 259             if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
 260                 return 0;
 261         }
 262     } else if (pss == NULL) {
 263         if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
 264             return 0;
 265         return 1;
 266     }
 267     if (BIO_puts(bp, "\n") <= 0)
 268         goto err;
 269     if (pss_key)
 270         indent += 2;
 271     if (!BIO_indent(bp, indent, 128))
 272         goto err;
 273     if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
 274         goto err;
 275
 276     if (pss->hashAlgorithm) {
 277         if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
 278             goto err;
 279     } else if (BIO_puts(bp, "sha1 (default)") <= 0) {
 280         goto err;
 281     }
 282
 283     if (BIO_puts(bp, "\n") <= 0)
 284         goto err;
 285
 286     if (!BIO_indent(bp, indent, 128))
 287         goto err;
 288
 289     if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
 290         goto err;
 291     if (pss->maskGenAlgorithm) {
 292         if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
 293             goto err;
 294         if (BIO_puts(bp, " with ") <= 0)
 295             goto err;
 296         maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
 297         if (maskHash != NULL) {
 298             if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
 299                 goto err;
 300         } else if (BIO_puts(bp, "INVALID") <= 0) {
 301             goto err;
 302         }
 303     } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) {
 304         goto err;
 305     }
 306     BIO_puts(bp, "\n");
 307
 308     if (!BIO_indent(bp, indent, 128))
 309         goto err;
 310     if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
 311         goto err;
 312     if (pss->saltLength) {
 313         if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
 314             goto err;
 315     } else if (BIO_puts(bp, "14 (default)") <= 0) {
 316         goto err;
 317     }
 318     BIO_puts(bp, "\n");
 319
 320     if (!BIO_indent(bp, indent, 128))
 321         goto err;
 322     if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
 323         goto err;
 324     if (pss->trailerField) {
 325         if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
 326             goto err;
 327     } else if (BIO_puts(bp, "BC (default)") <= 0) {
 328         goto err;
 329     }
 330     BIO_puts(bp, "\n");
 331
 332     rv = 1;
 333
 334  err:
 335     X509_ALGOR_free(maskHash);
 336     return rv;
 337
 338 }
 339
 340 static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
 341 {
 342     const RSA *x = pkey->pkey.rsa;
 343     char *str;
 344     const char *s;
 345     int ret = 0, mod_len = 0, ex_primes;
 346
 347     if (x->n != NULL)
 348         mod_len = BN_num_bits(x->n);
 349     ex_primes = sk_RSA_PRIME_INFO_num(x->prime_infos);
 350
 351     if (!BIO_indent(bp, off, 128))
 352         goto err;
 353
 354     if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ?  "RSA-PSS" : "RSA") <= 0)
 355         goto err;
 356
 357     if (priv && x->d) {
 358         if (BIO_printf(bp, "Private-Key: (%d bit, %d primes)\n",
 359                        mod_len, ex_primes <= 0 ? 2 : ex_primes + 2) <= 0)
 360             goto err;
 361         str = "modulus:";
 362         s = "publicExponent:";
 363     } else {
 364         if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
 365             goto err;
 366         str = "Modulus:";
 367         s = "Exponent:";
 368     }
 369     if (!ASN1_bn_print(bp, str, x->n, NULL, off))
 370         goto err;
 371     if (!ASN1_bn_print(bp, s, x->e, NULL, off))
 372         goto err;
 373     if (priv) {
 374         int i;
 375
 376         if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
 377             goto err;
 378         if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
 379             goto err;
 380         if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
 381             goto err;
 382         if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
 383             goto err;
 384         if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
 385             goto err;
 386         if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
 387             goto err;
 388         for (i = 0; i < sk_RSA_PRIME_INFO_num(x->prime_infos); i++) {
 389             /* print multi-prime info */
 390             BIGNUM *bn = NULL;
 391             RSA_PRIME_INFO *pinfo;
 392             int j;
 393
 394             pinfo = sk_RSA_PRIME_INFO_value(x->prime_infos, i);
 395             for (j = 0; j < 3; j++) {
 396                 if (!BIO_indent(bp, off, 128))
 397                     goto err;
 398                 switch (j) {
 399                 case 0:
 400                     if (BIO_printf(bp, "prime%d:", i + 3) <= 0)
 401                         goto err;
 402                     bn = pinfo->r;
 403                     break;
 404                 case 1:
 405                     if (BIO_printf(bp, "exponent%d:", i + 3) <= 0)
 406                         goto err;
 407                     bn = pinfo->d;
 408                     break;
 409                 case 2:
 410                     if (BIO_printf(bp, "coefficient%d:", i + 3) <= 0)
 411                         goto err;
 412                     bn = pinfo->t;
 413                     break;
 414                 default:
 415                     break;
 416                 }
 417                 if (!ASN1_bn_print(bp, "", bn, NULL, off))
 418                     goto err;
 419             }
 420         }
 421     }
 422     if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
 423         goto err;
 424     ret = 1;
 425  err:
 426     return ret;
 427 }
 428
 429 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 430                          ASN1_PCTX *ctx)
 431 {
 432     return pkey_rsa_print(bp, pkey, indent, 0);
 433 }
 434
 435 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 436                           ASN1_PCTX *ctx)
 437 {
 438     return pkey_rsa_print(bp, pkey, indent, 1);
 439 }
 440
 441 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
 442 {
 443     RSA_PSS_PARAMS *pss;
 444
 445     pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
 446                                     alg->parameter);
 447
 448     if (pss == NULL)
 449         return NULL;
 450
 451     if (pss->maskGenAlgorithm != NULL) {
 452         pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
 453         if (pss->maskHash == NULL) {
 454             RSA_PSS_PARAMS_free(pss);
 455             return NULL;
 456         }
 457     }
 458
 459     return pss;
 460 }
 461
 462 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
 463                          const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
 464 {
 465     if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
 466         int rv;
 467         RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
 468
 469         rv = rsa_pss_param_print(bp, 0, pss, indent);
 470         RSA_PSS_PARAMS_free(pss);
 471         if (!rv)
 472             return 0;
 473     } else if (BIO_puts(bp, "\n") <= 0) {
 474         return 0;
 475     }
 476     if (sig)
 477         return X509_signature_dump(bp, sig, indent);
 478     return 1;
 479 }
 480
 481 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 482 {
 483     X509_ALGOR *alg = NULL;
 484     const EVP_MD *md;
 485     const EVP_MD *mgf1md;
 486     int min_saltlen;
 487
 488     switch (op) {
 489
 490     case ASN1_PKEY_CTRL_PKCS7_SIGN:
 491         if (arg1 == 0)
 492             PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
 493         break;
 494
 495     case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
 496         if (pkey_is_pss(pkey))
 497             return -2;
 498         if (arg1 == 0)
 499             PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
 500         break;
 501 #ifndef OPENSSL_NO_CMS
 502     case ASN1_PKEY_CTRL_CMS_SIGN:
 503         if (arg1 == 0)
 504             return rsa_cms_sign(arg2);
 505         else if (arg1 == 1)
 506             return rsa_cms_verify(arg2);
 507         break;
 508
 509     case ASN1_PKEY_CTRL_CMS_ENVELOPE:
 510         if (pkey_is_pss(pkey))
 511             return -2;
 512         if (arg1 == 0)
 513             return rsa_cms_encrypt(arg2);
 514         else if (arg1 == 1)
 515             return rsa_cms_decrypt(arg2);
 516         break;
 517
 518     case ASN1_PKEY_CTRL_CMS_RI_TYPE:
 519         if (pkey_is_pss(pkey))
 520             return -2;
 521         *(int *)arg2 = CMS_RECIPINFO_TRANS;
 522         return 1;
 523 #endif
 524
 525     case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 526         if (pkey->pkey.rsa->pss != NULL) {
 527             if (!rsa_pss_get_param(pkey->pkey.rsa->pss, &md, &mgf1md,
 528                                    &min_saltlen)) {
 529                 RSAerr(0, ERR_R_INTERNAL_ERROR);
 530                 return 0;
 531             }
 532             *(int *)arg2 = EVP_MD_type(md);
 533             /* Return of 2 indicates this MD is mandatory */
 534             return 2;
 535         }
 536         *(int *)arg2 = NID_sha256;
 537         return 1;
 538
 539     default:
 540         return -2;
 541
 542     }
 543
 544     if (alg)
 545         X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
 546
 547     return 1;
 548
 549 }
 550
 551 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
 552 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
 553 {
 554     if (md == NULL || EVP_MD_type(md) == NID_sha1)
 555         return 1;
 556     *palg = X509_ALGOR_new();
 557     if (*palg == NULL)
 558         return 0;
 559     X509_ALGOR_set_md(*palg, md);
 560     return 1;
 561 }
 562
 563 /* Allocate and set MGF1 algorithm ID from EVP_MD */
 564 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
 565 {
 566     X509_ALGOR *algtmp = NULL;
 567     ASN1_STRING *stmp = NULL;
 568
 569     *palg = NULL;
 570     if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
 571         return 1;
 572     /* need to embed algorithm ID inside another */
 573     if (!rsa_md_to_algor(&algtmp, mgf1md))
 574         goto err;
 575     if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
 576          goto err;
 577     *palg = X509_ALGOR_new();
 578     if (*palg == NULL)
 579         goto err;
 580     X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
 581     stmp = NULL;
 582  err:
 583     ASN1_STRING_free(stmp);
 584     X509_ALGOR_free(algtmp);
 585     if (*palg)
 586         return 1;
 587     return 0;
 588 }
 589
 590 /* convert algorithm ID to EVP_MD, default SHA1 */
 591 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
 592 {
 593     const EVP_MD *md;
 594
 595     if (!alg)
 596         return EVP_sha1();
 597     md = EVP_get_digestbyobj(alg->algorithm);
 598     if (md == NULL)
 599         RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
 600     return md;
 601 }
 602
 603 /*
 604  * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
 605  * suitable for setting an AlgorithmIdentifier.
 606  */
 607
 608 static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
 609 {
 610     const EVP_MD *sigmd, *mgf1md;
 611     EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
 612     RSA *rsa = EVP_PKEY_get0_RSA(pk);
 613     int saltlen;
 614
 615     if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
 616         return NULL;
 617     if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
 618         return NULL;
 619     if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
 620         return NULL;
 621     if (saltlen == -1) {
 622         saltlen = EVP_MD_size(sigmd);
 623     } else if (saltlen == -2 || saltlen == -3) {
 624         saltlen = RSA_size(rsa) - EVP_MD_size(sigmd) - 2;
 625         if ((EVP_PKEY_bits(pk) & 0x7) == 1)
 626             saltlen--;
 627         if (saltlen < 0)
 628             return NULL;
 629     }
 630
 631     return rsa_pss_params_create(sigmd, mgf1md, saltlen);
 632 }
 633
 634 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
 635                                       const EVP_MD *mgf1md, int saltlen)
 636 {
 637     RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
 638
 639     if (pss == NULL)
 640         goto err;
 641     if (saltlen != 20) {
 642         pss->saltLength = ASN1_INTEGER_new();
 643         if (pss->saltLength == NULL)
 644             goto err;
 645         if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
 646             goto err;
 647     }
 648     if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
 649         goto err;
 650     if (mgf1md == NULL)
 651         mgf1md = sigmd;
 652     if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
 653         goto err;
 654     if (!rsa_md_to_algor(&pss->maskHash, mgf1md))
 655         goto err;
 656     return pss;
 657  err:
 658     RSA_PSS_PARAMS_free(pss);
 659     return NULL;
 660 }
 661
 662 static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
 663 {
 664     RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
 665     ASN1_STRING *os;
 666
 667     if (pss == NULL)
 668         return NULL;
 669
 670     os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
 671     RSA_PSS_PARAMS_free(pss);
 672     return os;
 673 }
 674
 675 /*
 676  * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
 677  * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
 678  * passed to pkctx instead.
 679  */
 680
 681 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
 682                           X509_ALGOR *sigalg, EVP_PKEY *pkey)
 683 {
 684     int rv = -1;
 685     int saltlen;
 686     const EVP_MD *mgf1md = NULL, *md = NULL;
 687     RSA_PSS_PARAMS *pss;
 688
 689     /* Sanity check: make sure it is PSS */
 690     if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
 691         RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
 692         return -1;
 693     }
 694     /* Decode PSS parameters */
 695     pss = rsa_pss_decode(sigalg);
 696
 697     if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
 698         RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
 699         goto err;
 700     }
 701
 702     /* We have all parameters now set up context */
 703     if (pkey) {
 704         if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
 705             goto err;
 706     } else {
 707         const EVP_MD *checkmd;
 708         if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
 709             goto err;
 710         if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
 711             RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
 712             goto err;
 713         }
 714     }
 715
 716     if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
 717         goto err;
 718
 719     if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
 720         goto err;
 721
 722     if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
 723         goto err;
 724     /* Carry on */
 725     rv = 1;
 726
 727  err:
 728     RSA_PSS_PARAMS_free(pss);
 729     return rv;
 730 }
 731
 732 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
 733                       const EVP_MD **pmgf1md, int *psaltlen)
 734 {
 735     if (pss == NULL)
 736         return 0;
 737     *pmd = rsa_algor_to_md(pss->hashAlgorithm);
 738     if (*pmd == NULL)
 739         return 0;
 740     *pmgf1md = rsa_algor_to_md(pss->maskHash);
 741     if (*pmgf1md == NULL)
 742         return 0;
 743     if (pss->saltLength) {
 744         *psaltlen = ASN1_INTEGER_get(pss->saltLength);
 745         if (*psaltlen < 0) {
 746             RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
 747             return 0;
 748         }
 749     } else {
 750         *psaltlen = 20;
 751     }
 752
 753     /*
 754      * low-level routines support only trailer field 0xbc (value 1) and
 755      * PKCS#1 says we should reject any other value anyway.
 756      */
 757     if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
 758         RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
 759         return 0;
 760     }
 761
 762     return 1;
 763 }
 764
 765 #ifndef OPENSSL_NO_CMS
 766 static int rsa_cms_verify(CMS_SignerInfo *si)
 767 {
 768     int nid, nid2;
 769     X509_ALGOR *alg;
 770     EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
 771
 772     CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
 773     nid = OBJ_obj2nid(alg->algorithm);
 774     if (nid == EVP_PKEY_RSA_PSS)
 775         return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
 776     /* Only PSS allowed for PSS keys */
 777     if (pkey_ctx_is_pss(pkctx)) {
 778         RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
 779         return 0;
 780     }
 781     if (nid == NID_rsaEncryption)
 782         return 1;
 783     /* Workaround for some implementation that use a signature OID */
 784     if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
 785         if (nid2 == NID_rsaEncryption)
 786             return 1;
 787     }
 788     return 0;
 789 }
 790 #endif
 791
 792 /*
 793  * Customised RSA item verification routine. This is called when a signature
 794  * is encountered requiring special handling. We currently only handle PSS.
 795  */
 796
 797 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
 798                            X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
 799                            EVP_PKEY *pkey)
 800 {
 801     /* Sanity check: make sure it is PSS */
 802     if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
 803         RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
 804         return -1;
 805     }
 806     if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
 807         /* Carry on */
 808         return 2;
 809     }
 810     return -1;
 811 }
 812
 813 #ifndef OPENSSL_NO_CMS
 814 static int rsa_cms_sign(CMS_SignerInfo *si)
 815 {
 816     int pad_mode = RSA_PKCS1_PADDING;
 817     X509_ALGOR *alg;
 818     EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
 819     ASN1_STRING *os = NULL;
 820
 821     CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
 822     if (pkctx) {
 823         if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
 824             return 0;
 825     }
 826     if (pad_mode == RSA_PKCS1_PADDING) {
 827         X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
 828         return 1;
 829     }
 830     /* We don't support it */
 831     if (pad_mode != RSA_PKCS1_PSS_PADDING)
 832         return 0;
 833     os = rsa_ctx_to_pss_string(pkctx);
 834     if (!os)
 835         return 0;
 836     X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
 837     return 1;
 838 }
 839 #endif
 840
 841 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
 842                          X509_ALGOR *alg1, X509_ALGOR *alg2,
 843                          ASN1_BIT_STRING *sig)
 844 {
 845     int pad_mode;
 846     EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
 847
 848     if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
 849         return 0;
 850     if (pad_mode == RSA_PKCS1_PADDING)
 851         return 2;
 852     if (pad_mode == RSA_PKCS1_PSS_PADDING) {
 853         ASN1_STRING *os1 = NULL;
 854         os1 = rsa_ctx_to_pss_string(pkctx);
 855         if (!os1)
 856             return 0;
 857         /* Duplicate parameters if we have to */
 858         if (alg2) {
 859             ASN1_STRING *os2 = ASN1_STRING_dup(os1);
 860             if (!os2) {
 861                 ASN1_STRING_free(os1);
 862                 return 0;
 863             }
 864             X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
 865                             V_ASN1_SEQUENCE, os2);
 866         }
 867         X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
 868                         V_ASN1_SEQUENCE, os1);
 869         return 3;
 870     }
 871     return 2;
 872 }
 873
 874 static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg,
 875                             const ASN1_STRING *sig)
 876 {
 877     int rv = 0;
 878     int mdnid, saltlen;
 879     uint32_t flags;
 880     const EVP_MD *mgf1md = NULL, *md = NULL;
 881     RSA_PSS_PARAMS *pss;
 882     int secbits;
 883
 884     /* Sanity check: make sure it is PSS */
 885     if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS)
 886         return 0;
 887     /* Decode PSS parameters */
 888     pss = rsa_pss_decode(sigalg);
 889     if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen))
 890         goto err;
 891     mdnid = EVP_MD_type(md);
 892     /*
 893      * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must
 894      * match and salt length must equal digest size
 895      */
 896     if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512)
 897             && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md))
 898         flags = X509_SIG_INFO_TLS;
 899     else
 900         flags = 0;
 901     /* Note: security bits half number of digest bits */
 902     secbits = EVP_MD_size(md) * 4;
 903     /*
 904      * SHA1 and MD5 are known to be broken. Reduce security bits so that
 905      * they're no longer accepted at security level 1. The real values don't
 906      * really matter as long as they're lower than 80, which is our security
 907      * level 1.
 908      * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for SHA1 at
 909      * 2^63.4
 910      * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
 911      * puts a chosen-prefix attack for MD5 at 2^39.
 912      */
 913     if (mdnid == NID_sha1)
 914         secbits = 64;
 915     else if (mdnid == NID_md5_sha1)
 916         secbits = 68;
 917     else if (mdnid == NID_md5)
 918         secbits = 39;
 919     X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, secbits,
 920                       flags);
 921     rv = 1;
 922     err:
 923     RSA_PSS_PARAMS_free(pss);
 924     return rv;
 925 }
 926
 927 #ifndef OPENSSL_NO_CMS
 928 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
 929 {
 930     RSA_OAEP_PARAMS *oaep;
 931
 932     oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
 933                                      alg->parameter);
 934
 935     if (oaep == NULL)
 936         return NULL;
 937
 938     if (oaep->maskGenFunc != NULL) {
 939         oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
 940         if (oaep->maskHash == NULL) {
 941             RSA_OAEP_PARAMS_free(oaep);
 942             return NULL;
 943         }
 944     }
 945     return oaep;
 946 }
 947
 948 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
 949 {
 950     EVP_PKEY_CTX *pkctx;
 951     X509_ALGOR *cmsalg;
 952     int nid;
 953     int rv = -1;
 954     unsigned char *label = NULL;
 955     int labellen = 0;
 956     const EVP_MD *mgf1md = NULL, *md = NULL;
 957     RSA_OAEP_PARAMS *oaep;
 958
 959     pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
 960     if (pkctx == NULL)
 961         return 0;
 962     if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
 963         return -1;
 964     nid = OBJ_obj2nid(cmsalg->algorithm);
 965     if (nid == NID_rsaEncryption)
 966         return 1;
 967     if (nid != NID_rsaesOaep) {
 968         RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
 969         return -1;
 970     }
 971     /* Decode OAEP parameters */
 972     oaep = rsa_oaep_decode(cmsalg);
 973
 974     if (oaep == NULL) {
 975         RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
 976         goto err;
 977     }
 978
 979     mgf1md = rsa_algor_to_md(oaep->maskHash);
 980     if (mgf1md == NULL)
 981         goto err;
 982     md = rsa_algor_to_md(oaep->hashFunc);
 983     if (md == NULL)
 984         goto err;
 985
 986     if (oaep->pSourceFunc != NULL) {
 987         X509_ALGOR *plab = oaep->pSourceFunc;
 988
 989         if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
 990             RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
 991             goto err;
 992         }
 993         if (plab->parameter->type != V_ASN1_OCTET_STRING) {
 994             RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
 995             goto err;
 996         }
 997
 998         label = plab->parameter->value.octet_string->data;
 999         /* Stop label being freed when OAEP parameters are freed */
1000         plab->parameter->value.octet_string->data = NULL;
1001         labellen = plab->parameter->value.octet_string->length;
1002     }
1003
1004     if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
1005         goto err;
1006     if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
1007         goto err;
1008     if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
1009         goto err;
1010     if (label != NULL
1011             && EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
1012         goto err;
1013     /* Carry on */
1014     rv = 1;
1015
1016  err:
1017     RSA_OAEP_PARAMS_free(oaep);
1018     return rv;
1019 }
1020
1021 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
1022 {
1023     const EVP_MD *md, *mgf1md;
1024     RSA_OAEP_PARAMS *oaep = NULL;
1025     ASN1_STRING *os = NULL;
1026     X509_ALGOR *alg;
1027     EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
1028     int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
1029     unsigned char *label;
1030
1031     if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
1032         return 0;
1033     if (pkctx) {
1034         if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
1035             return 0;
1036     }
1037     if (pad_mode == RSA_PKCS1_PADDING) {
1038         X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
1039         return 1;
1040     }
1041     /* Not supported */
1042     if (pad_mode != RSA_PKCS1_OAEP_PADDING)
1043         return 0;
1044     if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
1045         goto err;
1046     if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
1047         goto err;
1048     labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
1049     if (labellen < 0)
1050         goto err;
1051     oaep = RSA_OAEP_PARAMS_new();
1052     if (oaep == NULL)
1053         goto err;
1054     if (!rsa_md_to_algor(&oaep->hashFunc, md))
1055         goto err;
1056     if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
1057         goto err;
1058     if (labellen > 0) {
1059         ASN1_OCTET_STRING *los;
1060         oaep->pSourceFunc = X509_ALGOR_new();
1061         if (oaep->pSourceFunc == NULL)
1062             goto err;
1063         los = ASN1_OCTET_STRING_new();
1064         if (los == NULL)
1065             goto err;
1066         if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
1067             ASN1_OCTET_STRING_free(los);
1068             goto err;
1069         }
1070         X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
1071                         V_ASN1_OCTET_STRING, los);
1072     }
1073     /* create string with pss parameter encoding. */
1074     if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
1075          goto err;
1076     X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
1077     os = NULL;
1078     rv = 1;
1079  err:
1080     RSA_OAEP_PARAMS_free(oaep);
1081     ASN1_STRING_free(os);
1082     return rv;
1083 }
1084 #endif
1085
1086 static int rsa_pkey_check(const EVP_PKEY *pkey)
1087 {
1088     return RSA_check_key_ex(pkey->pkey.rsa, NULL);
1089 }
1090
1091 static size_t rsa_pkey_dirty_cnt(const EVP_PKEY *pkey)
1092 {
1093     return pkey->pkey.rsa->dirty_cnt;
1094 }
1095
1096 /*
1097  * For the moment, we trust the call path, where keys going through
1098  * rsa_pkey_export_to() match a KEYMGMT for the "RSA" keytype, while
1099  * keys going through rsa_pss_pkey_export_to() match a KEYMGMT for the
1100  * "RSA-PSS" keytype.
1101  * TODO(3.0) Investigate whether we should simply continue to trust the
1102  * call path, or if we should strengthen this function by checking that
1103  * |rsa_type| matches the RSA key subtype.  The latter requires ensuring
1104  * that the type flag for the RSA key is properly set by other functions
1105  * in this file.
1106  */
1107 static int rsa_int_export_to(const EVP_PKEY *from, int rsa_type,
1108                              void *to_keydata, EVP_KEYMGMT *to_keymgmt,
1109                              OPENSSL_CTX *libctx, const char *propq)
1110 {
1111     RSA *rsa = from->pkey.rsa;
1112     OSSL_PARAM_BLD *tmpl = OSSL_PARAM_BLD_new();
1113     OSSL_PARAM *params = NULL;
1114     int selection = 0;
1115     int rv = 0;
1116
1117     if (tmpl == NULL)
1118         return 0;
1119     /*
1120      * If the RSA method is foreign, then we can't be sure of anything, and
1121      * can therefore not export or pretend to export.
1122      */
1123     if (RSA_get_method(rsa) != RSA_PKCS1_OpenSSL())
1124         goto err;
1125
1126     /* Public parameters must always be present */
1127     if (RSA_get0_n(rsa) == NULL || RSA_get0_e(rsa) == NULL)
1128         goto err;
1129
1130     if (!rsa_todata(rsa, tmpl, NULL))
1131         goto err;
1132
1133     selection |= OSSL_KEYMGMT_SELECT_PUBLIC_KEY;
1134     if (RSA_get0_d(rsa) != NULL)
1135         selection |= OSSL_KEYMGMT_SELECT_PRIVATE_KEY;
1136
1137     if (rsa->pss != NULL) {
1138         const EVP_MD *md = NULL, *mgf1md = NULL;
1139         int md_nid, mgf1md_nid, saltlen;
1140         RSA_PSS_PARAMS_30 pss_params;
1141
1142         if (!rsa_pss_get_param(rsa->pss, &md, &mgf1md, &saltlen))
1143             goto err;
1144         md_nid = EVP_MD_type(md);
1145         mgf1md_nid = EVP_MD_type(mgf1md);
1146         if (!rsa_pss_params_30_set_defaults(&pss_params)
1147             || !rsa_pss_params_30_set_hashalg(&pss_params, md_nid)
1148             || !rsa_pss_params_30_set_maskgenhashalg(&pss_params, mgf1md_nid)
1149             || !rsa_pss_params_30_set_saltlen(&pss_params, saltlen)
1150             || !rsa_pss_params_30_todata(&pss_params, propq, tmpl, NULL))
1151             goto err;
1152         selection |= OSSL_KEYMGMT_SELECT_OTHER_PARAMETERS;
1153     }
1154
1155     if ((params = OSSL_PARAM_BLD_to_param(tmpl)) == NULL)
1156         goto err;
1157
1158     /* We export, the provider imports */
1159     rv = evp_keymgmt_import(to_keymgmt, to_keydata, selection, params);
1160
1161  err:
1162     OSSL_PARAM_BLD_free_params(params);
1163     OSSL_PARAM_BLD_free(tmpl);
1164     return rv;
1165 }
1166
1167 static int rsa_int_import_from(const OSSL_PARAM params[], void *vpctx,
1168                                int rsa_type)
1169 {
1170     EVP_PKEY_CTX *pctx = vpctx;
1171     EVP_PKEY *pkey = EVP_PKEY_CTX_get0_pkey(pctx);
1172     RSA *rsa = rsa_new_with_ctx(pctx->libctx);
1173     RSA_PSS_PARAMS_30 rsa_pss_params = { 0, };
1174     int ok = 0;
1175
1176     if (rsa == NULL) {
1177         ERR_raise(ERR_LIB_DH, ERR_R_MALLOC_FAILURE);
1178         return 0;
1179     }
1180
1181     RSA_clear_flags(rsa, RSA_FLAG_TYPE_MASK);
1182     RSA_set_flags(rsa, rsa_type);
1183
1184     if (!rsa_pss_params_30_fromdata(&rsa_pss_params, params, pctx->libctx))
1185         goto err;
1186
1187     switch (rsa_type) {
1188     case RSA_FLAG_TYPE_RSA:
1189         /*
1190          * Were PSS parameters filled in?
1191          * In that case, something's wrong
1192          */
1193         if (!rsa_pss_params_30_is_unrestricted(&rsa_pss_params))
1194             goto err;
1195         break;
1196     case RSA_FLAG_TYPE_RSASSAPSS:
1197         /*
1198          * Were PSS parameters filled in?  In that case, create the old
1199          * RSA_PSS_PARAMS structure.  Otherwise, this is an unrestricted key.
1200          */
1201         if (!rsa_pss_params_30_is_unrestricted(&rsa_pss_params)) {
1202             /* Create the older RSA_PSS_PARAMS from RSA_PSS_PARAMS_30 data */
1203             int mdnid = rsa_pss_params_30_hashalg(&rsa_pss_params);
1204             int mgf1mdnid = rsa_pss_params_30_maskgenhashalg(&rsa_pss_params);
1205             int saltlen = rsa_pss_params_30_saltlen(&rsa_pss_params);
1206             const EVP_MD *md = EVP_get_digestbynid(mdnid);
1207             const EVP_MD *mgf1md = EVP_get_digestbynid(mgf1mdnid);
1208
1209             if ((rsa->pss = rsa_pss_params_create(md, mgf1md, saltlen)) == NULL)
1210                 goto err;
1211         }
1212         break;
1213     default:
1214         /* RSA key sub-types we don't know how to handle yet */
1215         goto err;
1216     }
1217
1218     if (!rsa_fromdata(rsa, params))
1219         goto err;
1220
1221     switch (rsa_type) {
1222     case RSA_FLAG_TYPE_RSA:
1223         ok = EVP_PKEY_assign_RSA(pkey, rsa);
1224         break;
1225     case RSA_FLAG_TYPE_RSASSAPSS:
1226         ok = EVP_PKEY_assign(pkey, EVP_PKEY_RSA_PSS, rsa);
1227         break;
1228     }
1229
1230  err:
1231     if (!ok)
1232         RSA_free(rsa);
1233     return ok;
1234 }
1235
1236 static int rsa_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
1237                               EVP_KEYMGMT *to_keymgmt, OPENSSL_CTX *libctx,
1238                               const char *propq)
1239 {
1240     return rsa_int_export_to(from, RSA_FLAG_TYPE_RSA, to_keydata,
1241                              to_keymgmt, libctx, propq);
1242 }
1243
1244 static int rsa_pss_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
1245                                   EVP_KEYMGMT *to_keymgmt, OPENSSL_CTX *libctx,
1246                                   const char *propq)
1247 {
1248     return rsa_int_export_to(from, RSA_FLAG_TYPE_RSASSAPSS, to_keydata,
1249                              to_keymgmt, libctx, propq);
1250 }
1251
1252 static int rsa_pkey_import_from(const OSSL_PARAM params[], void *vpctx)
1253 {
1254     return rsa_int_import_from(params, vpctx, RSA_FLAG_TYPE_RSA);
1255 }
1256
1257 static int rsa_pss_pkey_import_from(const OSSL_PARAM params[], void *vpctx)
1258 {
1259     return rsa_int_import_from(params, vpctx, RSA_FLAG_TYPE_RSASSAPSS);
1260 }
1261
1262 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
1263     {
1264      EVP_PKEY_RSA,
1265      EVP_PKEY_RSA,
1266      ASN1_PKEY_SIGPARAM_NULL,
1267
1268      "RSA",
1269      "OpenSSL RSA method",
1270
1271      rsa_pub_decode,
1272      rsa_pub_encode,
1273      rsa_pub_cmp,
1274      rsa_pub_print,
1275
1276      rsa_priv_decode,
1277      rsa_priv_encode,
1278      rsa_priv_print,
1279
1280      int_rsa_size,
1281      rsa_bits,
1282      rsa_security_bits,
1283
1284      0, 0, 0, 0, 0, 0,
1285
1286      rsa_sig_print,
1287      int_rsa_free,
1288      rsa_pkey_ctrl,
1289      old_rsa_priv_decode,
1290      old_rsa_priv_encode,
1291      rsa_item_verify,
1292      rsa_item_sign,
1293      rsa_sig_info_set,
1294      rsa_pkey_check,
1295
1296      0, 0,
1297      0, 0, 0, 0,
1298
1299      rsa_pkey_dirty_cnt,
1300      rsa_pkey_export_to,
1301      rsa_pkey_import_from
1302     },
1303
1304     {
1305      EVP_PKEY_RSA2,
1306      EVP_PKEY_RSA,
1307      ASN1_PKEY_ALIAS}
1308 };
1309
1310 const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
1311      EVP_PKEY_RSA_PSS,
1312      EVP_PKEY_RSA_PSS,
1313      ASN1_PKEY_SIGPARAM_NULL,
1314
1315      "RSA-PSS",
1316      "OpenSSL RSA-PSS method",
1317
1318      rsa_pub_decode,
1319      rsa_pub_encode,
1320      rsa_pub_cmp,
1321      rsa_pub_print,
1322
1323      rsa_priv_decode,
1324      rsa_priv_encode,
1325      rsa_priv_print,
1326
1327      int_rsa_size,
1328      rsa_bits,
1329      rsa_security_bits,
1330
1331      0, 0, 0, 0, 0, 0,
1332
1333      rsa_sig_print,
1334      int_rsa_free,
1335      rsa_pkey_ctrl,
1336      0, 0,
1337      rsa_item_verify,
1338      rsa_item_sign,
1339      0,
1340      rsa_pkey_check,
1341
1342      0, 0,
1343      0, 0, 0, 0,
1344
1345      rsa_pkey_dirty_cnt,
1346      rsa_pss_pkey_export_to,
1347      rsa_pss_pkey_import_from
1348 };