crypto/rsa/rsa_ameth.c

   1 /*
   2  * Copyright 2006-2018 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 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/asn1t.h>
  13 #include <openssl/x509.h>
  14 #include <openssl/bn.h>
  15 #include <openssl/cms.h>
  16 #include <openssl/core_names.h>
  17 #include "internal/param_build.h"
  18 #include "crypto/asn1.h"
  19 #include "crypto/evp.h"
  20 #include "crypto/rsa.h"
  21 #include "rsa_local.h"
  22
  23 #ifndef OPENSSL_NO_CMS
  24 static int rsa_cms_sign(CMS_SignerInfo *si);
  25 static int rsa_cms_verify(CMS_SignerInfo *si);
  26 static int rsa_cms_decrypt(CMS_RecipientInfo *ri);
  27 static int rsa_cms_encrypt(CMS_RecipientInfo *ri);
  28 #endif
  29
  30 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg);
  31
  32 /* Set any parameters associated with pkey */
  33 static int rsa_param_encode(const EVP_PKEY *pkey,
  34                             ASN1_STRING **pstr, int *pstrtype)
  35 {
  36     const RSA *rsa = pkey->pkey.rsa;
  37
  38     *pstr = NULL;
  39     /* If RSA it's just NULL type */
  40     if (pkey->ameth->pkey_id != EVP_PKEY_RSA_PSS) {
  41         *pstrtype = V_ASN1_NULL;
  42         return 1;
  43     }
  44     /* If no PSS parameters we omit parameters entirely */
  45     if (rsa->pss == NULL) {
  46         *pstrtype = V_ASN1_UNDEF;
  47         return 1;
  48     }
  49     /* Encode PSS parameters */
  50     if (ASN1_item_pack(rsa->pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), pstr) == NULL)
  51         return 0;
  52
  53     *pstrtype = V_ASN1_SEQUENCE;
  54     return 1;
  55 }
  56 /* Decode any parameters and set them in RSA structure */
  57 static int rsa_param_decode(RSA *rsa, const X509_ALGOR *alg)
  58 {
  59     const ASN1_OBJECT *algoid;
  60     const void *algp;
  61     int algptype;
  62
  63     X509_ALGOR_get0(&algoid, &algptype, &algp, alg);
  64     if (OBJ_obj2nid(algoid) != EVP_PKEY_RSA_PSS)
  65         return 1;
  66     if (algptype == V_ASN1_UNDEF)
  67         return 1;
  68     if (algptype != V_ASN1_SEQUENCE) {
  69         RSAerr(RSA_F_RSA_PARAM_DECODE, RSA_R_INVALID_PSS_PARAMETERS);
  70         return 0;
  71     }
  72     rsa->pss = rsa_pss_decode(alg);
  73     if (rsa->pss == NULL)
  74         return 0;
  75     return 1;
  76 }
  77
  78 static int rsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
  79 {
  80     unsigned char *penc = NULL;
  81     int penclen;
  82     ASN1_STRING *str;
  83     int strtype;
  84
  85     if (!rsa_param_encode(pkey, &str, &strtype))
  86         return 0;
  87     penclen = i2d_RSAPublicKey(pkey->pkey.rsa, &penc);
  88     if (penclen <= 0)
  89         return 0;
  90     if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(pkey->ameth->pkey_id),
  91                                strtype, str, penc, penclen))
  92         return 1;
  93
  94     OPENSSL_free(penc);
  95     return 0;
  96 }
  97
  98 static int rsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
  99 {
 100     const unsigned char *p;
 101     int pklen;
 102     X509_ALGOR *alg;
 103     RSA *rsa = NULL;
 104
 105     if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &alg, pubkey))
 106         return 0;
 107     if ((rsa = d2i_RSAPublicKey(NULL, &p, pklen)) == NULL) {
 108         RSAerr(RSA_F_RSA_PUB_DECODE, ERR_R_RSA_LIB);
 109         return 0;
 110     }
 111     if (!rsa_param_decode(rsa, alg)) {
 112         RSA_free(rsa);
 113         return 0;
 114     }
 115     if (!EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa)) {
 116         RSA_free(rsa);
 117         return 0;
 118     }
 119     return 1;
 120 }
 121
 122 static int rsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
 123 {
 124     if (BN_cmp(b->pkey.rsa->n, a->pkey.rsa->n) != 0
 125         || BN_cmp(b->pkey.rsa->e, a->pkey.rsa->e) != 0)
 126         return 0;
 127     return 1;
 128 }
 129
 130 static int old_rsa_priv_decode(EVP_PKEY *pkey,
 131                                const unsigned char **pder, int derlen)
 132 {
 133     RSA *rsa;
 134
 135     if ((rsa = d2i_RSAPrivateKey(NULL, pder, derlen)) == NULL) {
 136         RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
 137         return 0;
 138     }
 139     EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
 140     return 1;
 141 }
 142
 143 static int old_rsa_priv_encode(const EVP_PKEY *pkey, unsigned char **pder)
 144 {
 145     return i2d_RSAPrivateKey(pkey->pkey.rsa, pder);
 146 }
 147
 148 static int rsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
 149 {
 150     unsigned char *rk = NULL;
 151     int rklen;
 152     ASN1_STRING *str;
 153     int strtype;
 154
 155     if (!rsa_param_encode(pkey, &str, &strtype))
 156         return 0;
 157     rklen = i2d_RSAPrivateKey(pkey->pkey.rsa, &rk);
 158
 159     if (rklen <= 0) {
 160         RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 161         ASN1_STRING_free(str);
 162         return 0;
 163     }
 164
 165     if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(pkey->ameth->pkey_id), 0,
 166                          strtype, str, rk, rklen)) {
 167         RSAerr(RSA_F_RSA_PRIV_ENCODE, ERR_R_MALLOC_FAILURE);
 168         ASN1_STRING_free(str);
 169         return 0;
 170     }
 171
 172     return 1;
 173 }
 174
 175 static int rsa_priv_decode(EVP_PKEY *pkey, const PKCS8_PRIV_KEY_INFO *p8)
 176 {
 177     const unsigned char *p;
 178     RSA *rsa;
 179     int pklen;
 180     const X509_ALGOR *alg;
 181
 182     if (!PKCS8_pkey_get0(NULL, &p, &pklen, &alg, p8))
 183         return 0;
 184     rsa = d2i_RSAPrivateKey(NULL, &p, pklen);
 185     if (rsa == NULL) {
 186         RSAerr(RSA_F_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
 187         return 0;
 188     }
 189     if (!rsa_param_decode(rsa, alg)) {
 190         RSA_free(rsa);
 191         return 0;
 192     }
 193     EVP_PKEY_assign(pkey, pkey->ameth->pkey_id, rsa);
 194     return 1;
 195 }
 196
 197 static int int_rsa_size(const EVP_PKEY *pkey)
 198 {
 199     return RSA_size(pkey->pkey.rsa);
 200 }
 201
 202 static int rsa_bits(const EVP_PKEY *pkey)
 203 {
 204     return BN_num_bits(pkey->pkey.rsa->n);
 205 }
 206
 207 static int rsa_security_bits(const EVP_PKEY *pkey)
 208 {
 209     return RSA_security_bits(pkey->pkey.rsa);
 210 }
 211
 212 static void int_rsa_free(EVP_PKEY *pkey)
 213 {
 214     RSA_free(pkey->pkey.rsa);
 215 }
 216
 217 static X509_ALGOR *rsa_mgf1_decode(X509_ALGOR *alg)
 218 {
 219     if (OBJ_obj2nid(alg->algorithm) != NID_mgf1)
 220         return NULL;
 221     return ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(X509_ALGOR),
 222                                      alg->parameter);
 223 }
 224
 225 static int rsa_pss_param_print(BIO *bp, int pss_key, RSA_PSS_PARAMS *pss,
 226                                int indent)
 227 {
 228     int rv = 0;
 229     X509_ALGOR *maskHash = NULL;
 230
 231     if (!BIO_indent(bp, indent, 128))
 232         goto err;
 233     if (pss_key) {
 234         if (pss == NULL) {
 235             if (BIO_puts(bp, "No PSS parameter restrictions\n") <= 0)
 236                 return 0;
 237             return 1;
 238         } else {
 239             if (BIO_puts(bp, "PSS parameter restrictions:") <= 0)
 240                 return 0;
 241         }
 242     } else if (pss == NULL) {
 243         if (BIO_puts(bp,"(INVALID PSS PARAMETERS)\n") <= 0)
 244             return 0;
 245         return 1;
 246     }
 247     if (BIO_puts(bp, "\n") <= 0)
 248         goto err;
 249     if (pss_key)
 250         indent += 2;
 251     if (!BIO_indent(bp, indent, 128))
 252         goto err;
 253     if (BIO_puts(bp, "Hash Algorithm: ") <= 0)
 254         goto err;
 255
 256     if (pss->hashAlgorithm) {
 257         if (i2a_ASN1_OBJECT(bp, pss->hashAlgorithm->algorithm) <= 0)
 258             goto err;
 259     } else if (BIO_puts(bp, "sha1 (default)") <= 0) {
 260         goto err;
 261     }
 262
 263     if (BIO_puts(bp, "\n") <= 0)
 264         goto err;
 265
 266     if (!BIO_indent(bp, indent, 128))
 267         goto err;
 268
 269     if (BIO_puts(bp, "Mask Algorithm: ") <= 0)
 270         goto err;
 271     if (pss->maskGenAlgorithm) {
 272         if (i2a_ASN1_OBJECT(bp, pss->maskGenAlgorithm->algorithm) <= 0)
 273             goto err;
 274         if (BIO_puts(bp, " with ") <= 0)
 275             goto err;
 276         maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
 277         if (maskHash != NULL) {
 278             if (i2a_ASN1_OBJECT(bp, maskHash->algorithm) <= 0)
 279                 goto err;
 280         } else if (BIO_puts(bp, "INVALID") <= 0) {
 281             goto err;
 282         }
 283     } else if (BIO_puts(bp, "mgf1 with sha1 (default)") <= 0) {
 284         goto err;
 285     }
 286     BIO_puts(bp, "\n");
 287
 288     if (!BIO_indent(bp, indent, 128))
 289         goto err;
 290     if (BIO_printf(bp, "%s Salt Length: 0x", pss_key ? "Minimum" : "") <= 0)
 291         goto err;
 292     if (pss->saltLength) {
 293         if (i2a_ASN1_INTEGER(bp, pss->saltLength) <= 0)
 294             goto err;
 295     } else if (BIO_puts(bp, "14 (default)") <= 0) {
 296         goto err;
 297     }
 298     BIO_puts(bp, "\n");
 299
 300     if (!BIO_indent(bp, indent, 128))
 301         goto err;
 302     if (BIO_puts(bp, "Trailer Field: 0x") <= 0)
 303         goto err;
 304     if (pss->trailerField) {
 305         if (i2a_ASN1_INTEGER(bp, pss->trailerField) <= 0)
 306             goto err;
 307     } else if (BIO_puts(bp, "BC (default)") <= 0) {
 308         goto err;
 309     }
 310     BIO_puts(bp, "\n");
 311
 312     rv = 1;
 313
 314  err:
 315     X509_ALGOR_free(maskHash);
 316     return rv;
 317
 318 }
 319
 320 static int pkey_rsa_print(BIO *bp, const EVP_PKEY *pkey, int off, int priv)
 321 {
 322     const RSA *x = pkey->pkey.rsa;
 323     char *str;
 324     const char *s;
 325     int ret = 0, mod_len = 0, ex_primes;
 326
 327     if (x->n != NULL)
 328         mod_len = BN_num_bits(x->n);
 329     ex_primes = sk_RSA_PRIME_INFO_num(x->prime_infos);
 330
 331     if (!BIO_indent(bp, off, 128))
 332         goto err;
 333
 334     if (BIO_printf(bp, "%s ", pkey_is_pss(pkey) ?  "RSA-PSS" : "RSA") <= 0)
 335         goto err;
 336
 337     if (priv && x->d) {
 338         if (BIO_printf(bp, "Private-Key: (%d bit, %d primes)\n",
 339                        mod_len, ex_primes <= 0 ? 2 : ex_primes + 2) <= 0)
 340             goto err;
 341         str = "modulus:";
 342         s = "publicExponent:";
 343     } else {
 344         if (BIO_printf(bp, "Public-Key: (%d bit)\n", mod_len) <= 0)
 345             goto err;
 346         str = "Modulus:";
 347         s = "Exponent:";
 348     }
 349     if (!ASN1_bn_print(bp, str, x->n, NULL, off))
 350         goto err;
 351     if (!ASN1_bn_print(bp, s, x->e, NULL, off))
 352         goto err;
 353     if (priv) {
 354         int i;
 355
 356         if (!ASN1_bn_print(bp, "privateExponent:", x->d, NULL, off))
 357             goto err;
 358         if (!ASN1_bn_print(bp, "prime1:", x->p, NULL, off))
 359             goto err;
 360         if (!ASN1_bn_print(bp, "prime2:", x->q, NULL, off))
 361             goto err;
 362         if (!ASN1_bn_print(bp, "exponent1:", x->dmp1, NULL, off))
 363             goto err;
 364         if (!ASN1_bn_print(bp, "exponent2:", x->dmq1, NULL, off))
 365             goto err;
 366         if (!ASN1_bn_print(bp, "coefficient:", x->iqmp, NULL, off))
 367             goto err;
 368         for (i = 0; i < sk_RSA_PRIME_INFO_num(x->prime_infos); i++) {
 369             /* print multi-prime info */
 370             BIGNUM *bn = NULL;
 371             RSA_PRIME_INFO *pinfo;
 372             int j;
 373
 374             pinfo = sk_RSA_PRIME_INFO_value(x->prime_infos, i);
 375             for (j = 0; j < 3; j++) {
 376                 if (!BIO_indent(bp, off, 128))
 377                     goto err;
 378                 switch (j) {
 379                 case 0:
 380                     if (BIO_printf(bp, "prime%d:", i + 3) <= 0)
 381                         goto err;
 382                     bn = pinfo->r;
 383                     break;
 384                 case 1:
 385                     if (BIO_printf(bp, "exponent%d:", i + 3) <= 0)
 386                         goto err;
 387                     bn = pinfo->d;
 388                     break;
 389                 case 2:
 390                     if (BIO_printf(bp, "coefficient%d:", i + 3) <= 0)
 391                         goto err;
 392                     bn = pinfo->t;
 393                     break;
 394                 default:
 395                     break;
 396                 }
 397                 if (!ASN1_bn_print(bp, "", bn, NULL, off))
 398                     goto err;
 399             }
 400         }
 401     }
 402     if (pkey_is_pss(pkey) && !rsa_pss_param_print(bp, 1, x->pss, off))
 403         goto err;
 404     ret = 1;
 405  err:
 406     return ret;
 407 }
 408
 409 static int rsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 410                          ASN1_PCTX *ctx)
 411 {
 412     return pkey_rsa_print(bp, pkey, indent, 0);
 413 }
 414
 415 static int rsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
 416                           ASN1_PCTX *ctx)
 417 {
 418     return pkey_rsa_print(bp, pkey, indent, 1);
 419 }
 420
 421 static RSA_PSS_PARAMS *rsa_pss_decode(const X509_ALGOR *alg)
 422 {
 423     RSA_PSS_PARAMS *pss;
 424
 425     pss = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_PSS_PARAMS),
 426                                     alg->parameter);
 427
 428     if (pss == NULL)
 429         return NULL;
 430
 431     if (pss->maskGenAlgorithm != NULL) {
 432         pss->maskHash = rsa_mgf1_decode(pss->maskGenAlgorithm);
 433         if (pss->maskHash == NULL) {
 434             RSA_PSS_PARAMS_free(pss);
 435             return NULL;
 436         }
 437     }
 438
 439     return pss;
 440 }
 441
 442 static int rsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
 443                          const ASN1_STRING *sig, int indent, ASN1_PCTX *pctx)
 444 {
 445     if (OBJ_obj2nid(sigalg->algorithm) == EVP_PKEY_RSA_PSS) {
 446         int rv;
 447         RSA_PSS_PARAMS *pss = rsa_pss_decode(sigalg);
 448
 449         rv = rsa_pss_param_print(bp, 0, pss, indent);
 450         RSA_PSS_PARAMS_free(pss);
 451         if (!rv)
 452             return 0;
 453     } else if (BIO_puts(bp, "\n") <= 0) {
 454         return 0;
 455     }
 456     if (sig)
 457         return X509_signature_dump(bp, sig, indent);
 458     return 1;
 459 }
 460
 461 static int rsa_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
 462 {
 463     X509_ALGOR *alg = NULL;
 464     const EVP_MD *md;
 465     const EVP_MD *mgf1md;
 466     int min_saltlen;
 467
 468     switch (op) {
 469
 470     case ASN1_PKEY_CTRL_PKCS7_SIGN:
 471         if (arg1 == 0)
 472             PKCS7_SIGNER_INFO_get0_algs(arg2, NULL, NULL, &alg);
 473         break;
 474
 475     case ASN1_PKEY_CTRL_PKCS7_ENCRYPT:
 476         if (pkey_is_pss(pkey))
 477             return -2;
 478         if (arg1 == 0)
 479             PKCS7_RECIP_INFO_get0_alg(arg2, &alg);
 480         break;
 481 #ifndef OPENSSL_NO_CMS
 482     case ASN1_PKEY_CTRL_CMS_SIGN:
 483         if (arg1 == 0)
 484             return rsa_cms_sign(arg2);
 485         else if (arg1 == 1)
 486             return rsa_cms_verify(arg2);
 487         break;
 488
 489     case ASN1_PKEY_CTRL_CMS_ENVELOPE:
 490         if (pkey_is_pss(pkey))
 491             return -2;
 492         if (arg1 == 0)
 493             return rsa_cms_encrypt(arg2);
 494         else if (arg1 == 1)
 495             return rsa_cms_decrypt(arg2);
 496         break;
 497
 498     case ASN1_PKEY_CTRL_CMS_RI_TYPE:
 499         if (pkey_is_pss(pkey))
 500             return -2;
 501         *(int *)arg2 = CMS_RECIPINFO_TRANS;
 502         return 1;
 503 #endif
 504
 505     case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
 506         if (pkey->pkey.rsa->pss != NULL) {
 507             if (!rsa_pss_get_param(pkey->pkey.rsa->pss, &md, &mgf1md,
 508                                    &min_saltlen)) {
 509                 RSAerr(0, ERR_R_INTERNAL_ERROR);
 510                 return 0;
 511             }
 512             *(int *)arg2 = EVP_MD_type(md);
 513             /* Return of 2 indicates this MD is mandatory */
 514             return 2;
 515         }
 516         *(int *)arg2 = NID_sha256;
 517         return 1;
 518
 519     default:
 520         return -2;
 521
 522     }
 523
 524     if (alg)
 525         X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
 526
 527     return 1;
 528
 529 }
 530
 531 /* allocate and set algorithm ID from EVP_MD, default SHA1 */
 532 static int rsa_md_to_algor(X509_ALGOR **palg, const EVP_MD *md)
 533 {
 534     if (md == NULL || EVP_MD_type(md) == NID_sha1)
 535         return 1;
 536     *palg = X509_ALGOR_new();
 537     if (*palg == NULL)
 538         return 0;
 539     X509_ALGOR_set_md(*palg, md);
 540     return 1;
 541 }
 542
 543 /* Allocate and set MGF1 algorithm ID from EVP_MD */
 544 static int rsa_md_to_mgf1(X509_ALGOR **palg, const EVP_MD *mgf1md)
 545 {
 546     X509_ALGOR *algtmp = NULL;
 547     ASN1_STRING *stmp = NULL;
 548
 549     *palg = NULL;
 550     if (mgf1md == NULL || EVP_MD_type(mgf1md) == NID_sha1)
 551         return 1;
 552     /* need to embed algorithm ID inside another */
 553     if (!rsa_md_to_algor(&algtmp, mgf1md))
 554         goto err;
 555     if (ASN1_item_pack(algtmp, ASN1_ITEM_rptr(X509_ALGOR), &stmp) == NULL)
 556          goto err;
 557     *palg = X509_ALGOR_new();
 558     if (*palg == NULL)
 559         goto err;
 560     X509_ALGOR_set0(*palg, OBJ_nid2obj(NID_mgf1), V_ASN1_SEQUENCE, stmp);
 561     stmp = NULL;
 562  err:
 563     ASN1_STRING_free(stmp);
 564     X509_ALGOR_free(algtmp);
 565     if (*palg)
 566         return 1;
 567     return 0;
 568 }
 569
 570 /* convert algorithm ID to EVP_MD, default SHA1 */
 571 static const EVP_MD *rsa_algor_to_md(X509_ALGOR *alg)
 572 {
 573     const EVP_MD *md;
 574
 575     if (!alg)
 576         return EVP_sha1();
 577     md = EVP_get_digestbyobj(alg->algorithm);
 578     if (md == NULL)
 579         RSAerr(RSA_F_RSA_ALGOR_TO_MD, RSA_R_UNKNOWN_DIGEST);
 580     return md;
 581 }
 582
 583 /*
 584  * Convert EVP_PKEY_CTX in PSS mode into corresponding algorithm parameter,
 585  * suitable for setting an AlgorithmIdentifier.
 586  */
 587
 588 static RSA_PSS_PARAMS *rsa_ctx_to_pss(EVP_PKEY_CTX *pkctx)
 589 {
 590     const EVP_MD *sigmd, *mgf1md;
 591     EVP_PKEY *pk = EVP_PKEY_CTX_get0_pkey(pkctx);
 592     RSA *rsa = EVP_PKEY_get0_RSA(pk);
 593     int saltlen;
 594
 595     if (EVP_PKEY_CTX_get_signature_md(pkctx, &sigmd) <= 0)
 596         return NULL;
 597     if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
 598         return NULL;
 599     if (!EVP_PKEY_CTX_get_rsa_pss_saltlen(pkctx, &saltlen))
 600         return NULL;
 601     if (saltlen == -1) {
 602         saltlen = EVP_MD_size(sigmd);
 603     } else if (saltlen == -2 || saltlen == -3) {
 604         saltlen = RSA_size(rsa) - EVP_MD_size(sigmd) - 2;
 605         if ((EVP_PKEY_bits(pk) & 0x7) == 1)
 606             saltlen--;
 607         if (saltlen < 0)
 608             return NULL;
 609     }
 610
 611     return rsa_pss_params_create(sigmd, mgf1md, saltlen);
 612 }
 613
 614 RSA_PSS_PARAMS *rsa_pss_params_create(const EVP_MD *sigmd,
 615                                       const EVP_MD *mgf1md, int saltlen)
 616 {
 617     RSA_PSS_PARAMS *pss = RSA_PSS_PARAMS_new();
 618
 619     if (pss == NULL)
 620         goto err;
 621     if (saltlen != 20) {
 622         pss->saltLength = ASN1_INTEGER_new();
 623         if (pss->saltLength == NULL)
 624             goto err;
 625         if (!ASN1_INTEGER_set(pss->saltLength, saltlen))
 626             goto err;
 627     }
 628     if (!rsa_md_to_algor(&pss->hashAlgorithm, sigmd))
 629         goto err;
 630     if (mgf1md == NULL)
 631         mgf1md = sigmd;
 632     if (!rsa_md_to_mgf1(&pss->maskGenAlgorithm, mgf1md))
 633         goto err;
 634     if (!rsa_md_to_algor(&pss->maskHash, mgf1md))
 635         goto err;
 636     return pss;
 637  err:
 638     RSA_PSS_PARAMS_free(pss);
 639     return NULL;
 640 }
 641
 642 static ASN1_STRING *rsa_ctx_to_pss_string(EVP_PKEY_CTX *pkctx)
 643 {
 644     RSA_PSS_PARAMS *pss = rsa_ctx_to_pss(pkctx);
 645     ASN1_STRING *os;
 646
 647     if (pss == NULL)
 648         return NULL;
 649
 650     os = ASN1_item_pack(pss, ASN1_ITEM_rptr(RSA_PSS_PARAMS), NULL);
 651     RSA_PSS_PARAMS_free(pss);
 652     return os;
 653 }
 654
 655 /*
 656  * From PSS AlgorithmIdentifier set public key parameters. If pkey isn't NULL
 657  * then the EVP_MD_CTX is setup and initialised. If it is NULL parameters are
 658  * passed to pkctx instead.
 659  */
 660
 661 static int rsa_pss_to_ctx(EVP_MD_CTX *ctx, EVP_PKEY_CTX *pkctx,
 662                           X509_ALGOR *sigalg, EVP_PKEY *pkey)
 663 {
 664     int rv = -1;
 665     int saltlen;
 666     const EVP_MD *mgf1md = NULL, *md = NULL;
 667     RSA_PSS_PARAMS *pss;
 668
 669     /* Sanity check: make sure it is PSS */
 670     if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
 671         RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
 672         return -1;
 673     }
 674     /* Decode PSS parameters */
 675     pss = rsa_pss_decode(sigalg);
 676
 677     if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen)) {
 678         RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_INVALID_PSS_PARAMETERS);
 679         goto err;
 680     }
 681
 682     /* We have all parameters now set up context */
 683     if (pkey) {
 684         if (!EVP_DigestVerifyInit(ctx, &pkctx, md, NULL, pkey))
 685             goto err;
 686     } else {
 687         const EVP_MD *checkmd;
 688         if (EVP_PKEY_CTX_get_signature_md(pkctx, &checkmd) <= 0)
 689             goto err;
 690         if (EVP_MD_type(md) != EVP_MD_type(checkmd)) {
 691             RSAerr(RSA_F_RSA_PSS_TO_CTX, RSA_R_DIGEST_DOES_NOT_MATCH);
 692             goto err;
 693         }
 694     }
 695
 696     if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_PSS_PADDING) <= 0)
 697         goto err;
 698
 699     if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkctx, saltlen) <= 0)
 700         goto err;
 701
 702     if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
 703         goto err;
 704     /* Carry on */
 705     rv = 1;
 706
 707  err:
 708     RSA_PSS_PARAMS_free(pss);
 709     return rv;
 710 }
 711
 712 int rsa_pss_get_param(const RSA_PSS_PARAMS *pss, const EVP_MD **pmd,
 713                       const EVP_MD **pmgf1md, int *psaltlen)
 714 {
 715     if (pss == NULL)
 716         return 0;
 717     *pmd = rsa_algor_to_md(pss->hashAlgorithm);
 718     if (*pmd == NULL)
 719         return 0;
 720     *pmgf1md = rsa_algor_to_md(pss->maskHash);
 721     if (*pmgf1md == NULL)
 722         return 0;
 723     if (pss->saltLength) {
 724         *psaltlen = ASN1_INTEGER_get(pss->saltLength);
 725         if (*psaltlen < 0) {
 726             RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_SALT_LENGTH);
 727             return 0;
 728         }
 729     } else {
 730         *psaltlen = 20;
 731     }
 732
 733     /*
 734      * low-level routines support only trailer field 0xbc (value 1) and
 735      * PKCS#1 says we should reject any other value anyway.
 736      */
 737     if (pss->trailerField && ASN1_INTEGER_get(pss->trailerField) != 1) {
 738         RSAerr(RSA_F_RSA_PSS_GET_PARAM, RSA_R_INVALID_TRAILER);
 739         return 0;
 740     }
 741
 742     return 1;
 743 }
 744
 745 #ifndef OPENSSL_NO_CMS
 746 static int rsa_cms_verify(CMS_SignerInfo *si)
 747 {
 748     int nid, nid2;
 749     X509_ALGOR *alg;
 750     EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
 751
 752     CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
 753     nid = OBJ_obj2nid(alg->algorithm);
 754     if (nid == EVP_PKEY_RSA_PSS)
 755         return rsa_pss_to_ctx(NULL, pkctx, alg, NULL);
 756     /* Only PSS allowed for PSS keys */
 757     if (pkey_ctx_is_pss(pkctx)) {
 758         RSAerr(RSA_F_RSA_CMS_VERIFY, RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE);
 759         return 0;
 760     }
 761     if (nid == NID_rsaEncryption)
 762         return 1;
 763     /* Workaround for some implementation that use a signature OID */
 764     if (OBJ_find_sigid_algs(nid, NULL, &nid2)) {
 765         if (nid2 == NID_rsaEncryption)
 766             return 1;
 767     }
 768     return 0;
 769 }
 770 #endif
 771
 772 /*
 773  * Customised RSA item verification routine. This is called when a signature
 774  * is encountered requiring special handling. We currently only handle PSS.
 775  */
 776
 777 static int rsa_item_verify(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
 778                            X509_ALGOR *sigalg, ASN1_BIT_STRING *sig,
 779                            EVP_PKEY *pkey)
 780 {
 781     /* Sanity check: make sure it is PSS */
 782     if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS) {
 783         RSAerr(RSA_F_RSA_ITEM_VERIFY, RSA_R_UNSUPPORTED_SIGNATURE_TYPE);
 784         return -1;
 785     }
 786     if (rsa_pss_to_ctx(ctx, NULL, sigalg, pkey) > 0) {
 787         /* Carry on */
 788         return 2;
 789     }
 790     return -1;
 791 }
 792
 793 #ifndef OPENSSL_NO_CMS
 794 static int rsa_cms_sign(CMS_SignerInfo *si)
 795 {
 796     int pad_mode = RSA_PKCS1_PADDING;
 797     X509_ALGOR *alg;
 798     EVP_PKEY_CTX *pkctx = CMS_SignerInfo_get0_pkey_ctx(si);
 799     ASN1_STRING *os = NULL;
 800
 801     CMS_SignerInfo_get0_algs(si, NULL, NULL, NULL, &alg);
 802     if (pkctx) {
 803         if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
 804             return 0;
 805     }
 806     if (pad_mode == RSA_PKCS1_PADDING) {
 807         X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
 808         return 1;
 809     }
 810     /* We don't support it */
 811     if (pad_mode != RSA_PKCS1_PSS_PADDING)
 812         return 0;
 813     os = rsa_ctx_to_pss_string(pkctx);
 814     if (!os)
 815         return 0;
 816     X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_PKEY_RSA_PSS), V_ASN1_SEQUENCE, os);
 817     return 1;
 818 }
 819 #endif
 820
 821 static int rsa_item_sign(EVP_MD_CTX *ctx, const ASN1_ITEM *it, void *asn,
 822                          X509_ALGOR *alg1, X509_ALGOR *alg2,
 823                          ASN1_BIT_STRING *sig)
 824 {
 825     int pad_mode;
 826     EVP_PKEY_CTX *pkctx = EVP_MD_CTX_pkey_ctx(ctx);
 827
 828     if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
 829         return 0;
 830     if (pad_mode == RSA_PKCS1_PADDING)
 831         return 2;
 832     if (pad_mode == RSA_PKCS1_PSS_PADDING) {
 833         ASN1_STRING *os1 = NULL;
 834         os1 = rsa_ctx_to_pss_string(pkctx);
 835         if (!os1)
 836             return 0;
 837         /* Duplicate parameters if we have to */
 838         if (alg2) {
 839             ASN1_STRING *os2 = ASN1_STRING_dup(os1);
 840             if (!os2) {
 841                 ASN1_STRING_free(os1);
 842                 return 0;
 843             }
 844             X509_ALGOR_set0(alg2, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
 845                             V_ASN1_SEQUENCE, os2);
 846         }
 847         X509_ALGOR_set0(alg1, OBJ_nid2obj(EVP_PKEY_RSA_PSS),
 848                         V_ASN1_SEQUENCE, os1);
 849         return 3;
 850     }
 851     return 2;
 852 }
 853
 854 static int rsa_sig_info_set(X509_SIG_INFO *siginf, const X509_ALGOR *sigalg,
 855                             const ASN1_STRING *sig)
 856 {
 857     int rv = 0;
 858     int mdnid, saltlen;
 859     uint32_t flags;
 860     const EVP_MD *mgf1md = NULL, *md = NULL;
 861     RSA_PSS_PARAMS *pss;
 862     int secbits;
 863
 864     /* Sanity check: make sure it is PSS */
 865     if (OBJ_obj2nid(sigalg->algorithm) != EVP_PKEY_RSA_PSS)
 866         return 0;
 867     /* Decode PSS parameters */
 868     pss = rsa_pss_decode(sigalg);
 869     if (!rsa_pss_get_param(pss, &md, &mgf1md, &saltlen))
 870         goto err;
 871     mdnid = EVP_MD_type(md);
 872     /*
 873      * For TLS need SHA256, SHA384 or SHA512, digest and MGF1 digest must
 874      * match and salt length must equal digest size
 875      */
 876     if ((mdnid == NID_sha256 || mdnid == NID_sha384 || mdnid == NID_sha512)
 877             && mdnid == EVP_MD_type(mgf1md) && saltlen == EVP_MD_size(md))
 878         flags = X509_SIG_INFO_TLS;
 879     else
 880         flags = 0;
 881     /* Note: security bits half number of digest bits */
 882     secbits = EVP_MD_size(md) * 4;
 883     /*
 884      * SHA1 and MD5 are known to be broken. Reduce security bits so that
 885      * they're no longer accepted at security level 1. The real values don't
 886      * really matter as long as they're lower than 80, which is our security
 887      * level 1.
 888      * https://eprint.iacr.org/2020/014 puts a chosen-prefix attack for SHA1 at
 889      * 2^63.4
 890      * https://documents.epfl.ch/users/l/le/lenstra/public/papers/lat.pdf
 891      * puts a chosen-prefix attack for MD5 at 2^39.
 892      */
 893     if (mdnid == NID_sha1)
 894         secbits = 64;
 895     else if (mdnid == NID_md5_sha1)
 896         secbits = 68;
 897     else if (mdnid == NID_md5)
 898         secbits = 39;
 899     X509_SIG_INFO_set(siginf, mdnid, EVP_PKEY_RSA_PSS, secbits,
 900                       flags);
 901     rv = 1;
 902     err:
 903     RSA_PSS_PARAMS_free(pss);
 904     return rv;
 905 }
 906
 907 #ifndef OPENSSL_NO_CMS
 908 static RSA_OAEP_PARAMS *rsa_oaep_decode(const X509_ALGOR *alg)
 909 {
 910     RSA_OAEP_PARAMS *oaep;
 911
 912     oaep = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(RSA_OAEP_PARAMS),
 913                                      alg->parameter);
 914
 915     if (oaep == NULL)
 916         return NULL;
 917
 918     if (oaep->maskGenFunc != NULL) {
 919         oaep->maskHash = rsa_mgf1_decode(oaep->maskGenFunc);
 920         if (oaep->maskHash == NULL) {
 921             RSA_OAEP_PARAMS_free(oaep);
 922             return NULL;
 923         }
 924     }
 925     return oaep;
 926 }
 927
 928 static int rsa_cms_decrypt(CMS_RecipientInfo *ri)
 929 {
 930     EVP_PKEY_CTX *pkctx;
 931     X509_ALGOR *cmsalg;
 932     int nid;
 933     int rv = -1;
 934     unsigned char *label = NULL;
 935     int labellen = 0;
 936     const EVP_MD *mgf1md = NULL, *md = NULL;
 937     RSA_OAEP_PARAMS *oaep;
 938
 939     pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
 940     if (pkctx == NULL)
 941         return 0;
 942     if (!CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &cmsalg))
 943         return -1;
 944     nid = OBJ_obj2nid(cmsalg->algorithm);
 945     if (nid == NID_rsaEncryption)
 946         return 1;
 947     if (nid != NID_rsaesOaep) {
 948         RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_ENCRYPTION_TYPE);
 949         return -1;
 950     }
 951     /* Decode OAEP parameters */
 952     oaep = rsa_oaep_decode(cmsalg);
 953
 954     if (oaep == NULL) {
 955         RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_OAEP_PARAMETERS);
 956         goto err;
 957     }
 958
 959     mgf1md = rsa_algor_to_md(oaep->maskHash);
 960     if (mgf1md == NULL)
 961         goto err;
 962     md = rsa_algor_to_md(oaep->hashFunc);
 963     if (md == NULL)
 964         goto err;
 965
 966     if (oaep->pSourceFunc != NULL) {
 967         X509_ALGOR *plab = oaep->pSourceFunc;
 968
 969         if (OBJ_obj2nid(plab->algorithm) != NID_pSpecified) {
 970             RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_UNSUPPORTED_LABEL_SOURCE);
 971             goto err;
 972         }
 973         if (plab->parameter->type != V_ASN1_OCTET_STRING) {
 974             RSAerr(RSA_F_RSA_CMS_DECRYPT, RSA_R_INVALID_LABEL);
 975             goto err;
 976         }
 977
 978         label = plab->parameter->value.octet_string->data;
 979         /* Stop label being freed when OAEP parameters are freed */
 980         plab->parameter->value.octet_string->data = NULL;
 981         labellen = plab->parameter->value.octet_string->length;
 982     }
 983
 984     if (EVP_PKEY_CTX_set_rsa_padding(pkctx, RSA_PKCS1_OAEP_PADDING) <= 0)
 985         goto err;
 986     if (EVP_PKEY_CTX_set_rsa_oaep_md(pkctx, md) <= 0)
 987         goto err;
 988     if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkctx, mgf1md) <= 0)
 989         goto err;
 990     if (EVP_PKEY_CTX_set0_rsa_oaep_label(pkctx, label, labellen) <= 0)
 991         goto err;
 992     /* Carry on */
 993     rv = 1;
 994
 995  err:
 996     RSA_OAEP_PARAMS_free(oaep);
 997     return rv;
 998 }
 999
1000 static int rsa_cms_encrypt(CMS_RecipientInfo *ri)
1001 {
1002     const EVP_MD *md, *mgf1md;
1003     RSA_OAEP_PARAMS *oaep = NULL;
1004     ASN1_STRING *os = NULL;
1005     X509_ALGOR *alg;
1006     EVP_PKEY_CTX *pkctx = CMS_RecipientInfo_get0_pkey_ctx(ri);
1007     int pad_mode = RSA_PKCS1_PADDING, rv = 0, labellen;
1008     unsigned char *label;
1009
1010     if (CMS_RecipientInfo_ktri_get0_algs(ri, NULL, NULL, &alg) <= 0)
1011         return 0;
1012     if (pkctx) {
1013         if (EVP_PKEY_CTX_get_rsa_padding(pkctx, &pad_mode) <= 0)
1014             return 0;
1015     }
1016     if (pad_mode == RSA_PKCS1_PADDING) {
1017         X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
1018         return 1;
1019     }
1020     /* Not supported */
1021     if (pad_mode != RSA_PKCS1_OAEP_PADDING)
1022         return 0;
1023     if (EVP_PKEY_CTX_get_rsa_oaep_md(pkctx, &md) <= 0)
1024         goto err;
1025     if (EVP_PKEY_CTX_get_rsa_mgf1_md(pkctx, &mgf1md) <= 0)
1026         goto err;
1027     labellen = EVP_PKEY_CTX_get0_rsa_oaep_label(pkctx, &label);
1028     if (labellen < 0)
1029         goto err;
1030     oaep = RSA_OAEP_PARAMS_new();
1031     if (oaep == NULL)
1032         goto err;
1033     if (!rsa_md_to_algor(&oaep->hashFunc, md))
1034         goto err;
1035     if (!rsa_md_to_mgf1(&oaep->maskGenFunc, mgf1md))
1036         goto err;
1037     if (labellen > 0) {
1038         ASN1_OCTET_STRING *los;
1039         oaep->pSourceFunc = X509_ALGOR_new();
1040         if (oaep->pSourceFunc == NULL)
1041             goto err;
1042         los = ASN1_OCTET_STRING_new();
1043         if (los == NULL)
1044             goto err;
1045         if (!ASN1_OCTET_STRING_set(los, label, labellen)) {
1046             ASN1_OCTET_STRING_free(los);
1047             goto err;
1048         }
1049         X509_ALGOR_set0(oaep->pSourceFunc, OBJ_nid2obj(NID_pSpecified),
1050                         V_ASN1_OCTET_STRING, los);
1051     }
1052     /* create string with pss parameter encoding. */
1053     if (!ASN1_item_pack(oaep, ASN1_ITEM_rptr(RSA_OAEP_PARAMS), &os))
1054          goto err;
1055     X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaesOaep), V_ASN1_SEQUENCE, os);
1056     os = NULL;
1057     rv = 1;
1058  err:
1059     RSA_OAEP_PARAMS_free(oaep);
1060     ASN1_STRING_free(os);
1061     return rv;
1062 }
1063 #endif
1064
1065 static int rsa_pkey_check(const EVP_PKEY *pkey)
1066 {
1067     return RSA_check_key_ex(pkey->pkey.rsa, NULL);
1068 }
1069
1070 static size_t rsa_pkey_dirty_cnt(const EVP_PKEY *pkey)
1071 {
1072     return pkey->pkey.rsa->dirty_cnt;
1073 }
1074
1075 DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
1076
1077 static int rsa_pkey_export_to(const EVP_PKEY *from, void *to_keydata,
1078                               EVP_KEYMGMT *to_keymgmt)
1079 {
1080     RSA *rsa = from->pkey.rsa;
1081     OSSL_PARAM_BLD tmpl;
1082     const BIGNUM *n = RSA_get0_n(rsa), *e = RSA_get0_e(rsa);
1083     const BIGNUM *d = RSA_get0_d(rsa);
1084     STACK_OF(BIGNUM_const) *primes = NULL, *exps = NULL, *coeffs = NULL;
1085     int numprimes = 0, numexps = 0, numcoeffs = 0;
1086     OSSL_PARAM *params = NULL;
1087     int rv = 0;
1088
1089     /* Public parameters must always be present */
1090     if (n == NULL || e == NULL)
1091         goto err;
1092
1093     ossl_param_bld_init(&tmpl);
1094
1095     /* |e| and |n| are always present */
1096     if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_E, e))
1097         goto err;
1098     if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_N, n))
1099         goto err;
1100
1101     if (d != NULL) {
1102         int i;
1103
1104         /* Get all the primes and CRT params */
1105         if ((primes = sk_BIGNUM_const_new_null()) == NULL
1106             || (exps = sk_BIGNUM_const_new_null()) == NULL
1107             || (coeffs = sk_BIGNUM_const_new_null()) == NULL)
1108             goto err;
1109
1110         if (!rsa_get0_all_params(rsa, primes, exps, coeffs))
1111             goto err;
1112
1113         numprimes = sk_BIGNUM_const_num(primes);
1114         numexps = sk_BIGNUM_const_num(exps);
1115         numcoeffs = sk_BIGNUM_const_num(coeffs);
1116
1117         if (numprimes < 2 || numexps < 2 || numcoeffs < 1)
1118             goto err;
1119
1120         /* assert that an OSSL_PARAM_BLD has enough space. */
1121         if (!ossl_assert(/* n, e */ 2 + /* d */ 1 + /* numprimes */ 1
1122                          + numprimes + numexps + numcoeffs
1123                          <= OSSL_PARAM_BLD_MAX))
1124             goto err;
1125
1126         if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_D, d))
1127             goto err;
1128
1129         for (i = 0; i < numprimes; i++) {
1130             const BIGNUM *num = sk_BIGNUM_const_value(primes, i);
1131
1132             if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_FACTOR,
1133                                         num))
1134                 goto err;
1135         }
1136
1137         for (i = 0; i < numexps; i++) {
1138             const BIGNUM *num = sk_BIGNUM_const_value(exps, i);
1139
1140             if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_EXPONENT,
1141                                         num))
1142                 goto err;
1143         }
1144
1145         for (i = 0; i < numcoeffs; i++) {
1146             const BIGNUM *num = sk_BIGNUM_const_value(coeffs, i);
1147
1148             if (!ossl_param_bld_push_BN(&tmpl, OSSL_PKEY_PARAM_RSA_COEFFICIENT,
1149                                         num))
1150                 goto err;
1151         }
1152     }
1153
1154     if ((params = ossl_param_bld_to_param(&tmpl)) == NULL)
1155         goto err;
1156
1157     /* We export, the provider imports */
1158     rv = evp_keymgmt_import(to_keymgmt, to_keydata, OSSL_KEYMGMT_SELECT_ALL,
1159                             params);
1160
1161  err:
1162     sk_BIGNUM_const_free(primes);
1163     sk_BIGNUM_const_free(exps);
1164     sk_BIGNUM_const_free(coeffs);
1165     ossl_param_bld_free(params);
1166     return rv;
1167 }
1168
1169 const EVP_PKEY_ASN1_METHOD rsa_asn1_meths[2] = {
1170     {
1171      EVP_PKEY_RSA,
1172      EVP_PKEY_RSA,
1173      ASN1_PKEY_SIGPARAM_NULL,
1174
1175      "RSA",
1176      "OpenSSL RSA method",
1177
1178      rsa_pub_decode,
1179      rsa_pub_encode,
1180      rsa_pub_cmp,
1181      rsa_pub_print,
1182
1183      rsa_priv_decode,
1184      rsa_priv_encode,
1185      rsa_priv_print,
1186
1187      int_rsa_size,
1188      rsa_bits,
1189      rsa_security_bits,
1190
1191      0, 0, 0, 0, 0, 0,
1192
1193      rsa_sig_print,
1194      int_rsa_free,
1195      rsa_pkey_ctrl,
1196      old_rsa_priv_decode,
1197      old_rsa_priv_encode,
1198      rsa_item_verify,
1199      rsa_item_sign,
1200      rsa_sig_info_set,
1201      rsa_pkey_check,
1202
1203      0, 0,
1204      0, 0, 0, 0,
1205
1206      rsa_pkey_dirty_cnt,
1207      rsa_pkey_export_to
1208     },
1209
1210     {
1211      EVP_PKEY_RSA2,
1212      EVP_PKEY_RSA,
1213      ASN1_PKEY_ALIAS}
1214 };
1215
1216 const EVP_PKEY_ASN1_METHOD rsa_pss_asn1_meth = {
1217      EVP_PKEY_RSA_PSS,
1218      EVP_PKEY_RSA_PSS,
1219      ASN1_PKEY_SIGPARAM_NULL,
1220
1221      "RSA-PSS",
1222      "OpenSSL RSA-PSS method",
1223
1224      rsa_pub_decode,
1225      rsa_pub_encode,
1226      rsa_pub_cmp,
1227      rsa_pub_print,
1228
1229      rsa_priv_decode,
1230      rsa_priv_encode,
1231      rsa_priv_print,
1232
1233      int_rsa_size,
1234      rsa_bits,
1235      rsa_security_bits,
1236
1237      0, 0, 0, 0, 0, 0,
1238
1239      rsa_sig_print,
1240      int_rsa_free,
1241      rsa_pkey_ctrl,
1242      0, 0,
1243      rsa_item_verify,
1244      rsa_item_sign,
1245      0,
1246      rsa_pkey_check,
1247
1248      0, 0,
1249      0, 0, 0, 0,
1250
1251      rsa_pkey_dirty_cnt,
1252      rsa_pkey_export_to
1253 };