crypto/rsa/rsa_lib.c

   1 /*
   2  * Copyright 1995-2018 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 /*
  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 <openssl/crypto.h>
  18 #include <openssl/core_names.h>
  19 #include <openssl/engine.h>
  20 #include <openssl/evp.h>
  21 #include "internal/cryptlib.h"
  22 #include "internal/refcount.h"
  23 #include "crypto/bn.h"
  24 #include "crypto/evp.h"
  25 #include "crypto/rsa.h"
  26 #include "rsa_local.h"
  27
  28 static RSA *rsa_new_intern(ENGINE *engine, OPENSSL_CTX *libctx);
  29
  30 #ifndef FIPS_MODE
  31 RSA *RSA_new(void)
  32 {
  33     return rsa_new_intern(NULL, NULL);
  34 }
  35
  36 const RSA_METHOD *RSA_get_method(const RSA *rsa)
  37 {
  38     return rsa->meth;
  39 }
  40
  41 int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
  42 {
  43     /*
  44      * NB: The caller is specifically setting a method, so it's not up to us
  45      * to deal with which ENGINE it comes from.
  46      */
  47     const RSA_METHOD *mtmp;
  48     mtmp = rsa->meth;
  49     if (mtmp->finish)
  50         mtmp->finish(rsa);
  51 #ifndef OPENSSL_NO_ENGINE
  52     ENGINE_finish(rsa->engine);
  53     rsa->engine = NULL;
  54 #endif
  55     rsa->meth = meth;
  56     if (meth->init)
  57         meth->init(rsa);
  58     return 1;
  59 }
  60
  61 RSA *RSA_new_method(ENGINE *engine)
  62 {
  63     return rsa_new_intern(engine, NULL);
  64 }
  65 #endif
  66
  67 RSA *rsa_new_with_ctx(OPENSSL_CTX *libctx)
  68 {
  69     return rsa_new_intern(NULL, libctx);
  70 }
  71
  72 static RSA *rsa_new_intern(ENGINE *engine, OPENSSL_CTX *libctx)
  73 {
  74     RSA *ret = OPENSSL_zalloc(sizeof(*ret));
  75
  76     if (ret == NULL) {
  77         RSAerr(0, ERR_R_MALLOC_FAILURE);
  78         return NULL;
  79     }
  80
  81     ret->references = 1;
  82     ret->lock = CRYPTO_THREAD_lock_new();
  83     if (ret->lock == NULL) {
  84         RSAerr(0, ERR_R_MALLOC_FAILURE);
  85         OPENSSL_free(ret);
  86         return NULL;
  87     }
  88
  89     ret->libctx = libctx;
  90     ret->meth = RSA_get_default_method();
  91 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
  92     ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
  93     if (engine) {
  94         if (!ENGINE_init(engine)) {
  95             RSAerr(0, ERR_R_ENGINE_LIB);
  96             goto err;
  97         }
  98         ret->engine = engine;
  99     } else {
 100         ret->engine = ENGINE_get_default_RSA();
 101     }
 102     if (ret->engine) {
 103         ret->meth = ENGINE_get_RSA(ret->engine);
 104         if (ret->meth == NULL) {
 105             RSAerr(0, ERR_R_ENGINE_LIB);
 106             goto err;
 107         }
 108     }
 109 #endif
 110
 111     ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
 112 #ifndef FIPS_MODE
 113     if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
 114         goto err;
 115     }
 116 #endif
 117
 118     if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
 119         RSAerr(0, ERR_R_INIT_FAIL);
 120         goto err;
 121     }
 122
 123     return ret;
 124
 125  err:
 126     RSA_free(ret);
 127     return NULL;
 128 }
 129
 130 void RSA_free(RSA *r)
 131 {
 132     int i;
 133
 134     if (r == NULL)
 135         return;
 136
 137     CRYPTO_DOWN_REF(&r->references, &i, r->lock);
 138     REF_PRINT_COUNT("RSA", r);
 139     if (i > 0)
 140         return;
 141     REF_ASSERT_ISNT(i < 0);
 142
 143     if (r->meth != NULL && r->meth->finish != NULL)
 144         r->meth->finish(r);
 145 #if !defined(OPENSSL_NO_ENGINE) && !defined(FIPS_MODE)
 146     ENGINE_finish(r->engine);
 147 #endif
 148
 149 #ifndef FIPS_MODE
 150     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
 151 #endif
 152
 153     CRYPTO_THREAD_lock_free(r->lock);
 154
 155     BN_free(r->n);
 156     BN_free(r->e);
 157     BN_clear_free(r->d);
 158     BN_clear_free(r->p);
 159     BN_clear_free(r->q);
 160     BN_clear_free(r->dmp1);
 161     BN_clear_free(r->dmq1);
 162     BN_clear_free(r->iqmp);
 163     /* TODO(3.0): Support PSS in FIPS_MODE */
 164 #ifndef FIPS_MODE
 165     RSA_PSS_PARAMS_free(r->pss);
 166     sk_RSA_PRIME_INFO_pop_free(r->prime_infos, rsa_multip_info_free);
 167 #endif
 168     BN_BLINDING_free(r->blinding);
 169     BN_BLINDING_free(r->mt_blinding);
 170     OPENSSL_free(r->bignum_data);
 171     OPENSSL_free(r);
 172 }
 173
 174 int RSA_up_ref(RSA *r)
 175 {
 176     int i;
 177
 178     if (CRYPTO_UP_REF(&r->references, &i, r->lock) <= 0)
 179         return 0;
 180
 181     REF_PRINT_COUNT("RSA", r);
 182     REF_ASSERT_ISNT(i < 2);
 183     return i > 1 ? 1 : 0;
 184 }
 185
 186 #ifndef FIPS_MODE
 187 int RSA_set_ex_data(RSA *r, int idx, void *arg)
 188 {
 189     return CRYPTO_set_ex_data(&r->ex_data, idx, arg);
 190 }
 191
 192 void *RSA_get_ex_data(const RSA *r, int idx)
 193 {
 194     return CRYPTO_get_ex_data(&r->ex_data, idx);
 195 }
 196 #endif
 197
 198 /*
 199  * Define a scaling constant for our fixed point arithmetic.
 200  * This value must be a power of two because the base two logarithm code
 201  * makes this assumption.  The exponent must also be a multiple of three so
 202  * that the scale factor has an exact cube root.  Finally, the scale factor
 203  * should not be so large that a multiplication of two scaled numbers
 204  * overflows a 64 bit unsigned integer.
 205  */
 206 static const unsigned int scale = 1 << 18;
 207 static const unsigned int cbrt_scale = 1 << (2 * 18 / 3);
 208
 209 /* Define some constants, none exceed 32 bits */
 210 static const unsigned int log_2  = 0x02c5c8;    /* scale * log(2) */
 211 static const unsigned int log_e  = 0x05c551;    /* scale * log2(M_E) */
 212 static const unsigned int c1_923 = 0x07b126;    /* scale * 1.923 */
 213 static const unsigned int c4_690 = 0x12c28f;    /* scale * 4.690 */
 214
 215 /*
 216  * Multiply two scaled integers together and rescale the result.
 217  */
 218 static ossl_inline uint64_t mul2(uint64_t a, uint64_t b)
 219 {
 220     return a * b / scale;
 221 }
 222
 223 /*
 224  * Calculate the cube root of a 64 bit scaled integer.
 225  * Although the cube root of a 64 bit number does fit into a 32 bit unsigned
 226  * integer, this is not guaranteed after scaling, so this function has a
 227  * 64 bit return.  This uses the shifting nth root algorithm with some
 228  * algebraic simplifications.
 229  */
 230 static uint64_t icbrt64(uint64_t x)
 231 {
 232     uint64_t r = 0;
 233     uint64_t b;
 234     int s;
 235
 236     for (s = 63; s >= 0; s -= 3) {
 237         r <<= 1;
 238         b = 3 * r * (r + 1) + 1;
 239         if ((x >> s) >= b) {
 240             x -= b << s;
 241             r++;
 242         }
 243     }
 244     return r * cbrt_scale;
 245 }
 246
 247 /*
 248  * Calculate the natural logarithm of a 64 bit scaled integer.
 249  * This is done by calculating a base two logarithm and scaling.
 250  * The maximum logarithm (base 2) is 64 and this reduces base e, so
 251  * a 32 bit result should not overflow.  The argument passed must be
 252  * greater than unity so we don't need to handle negative results.
 253  */
 254 static uint32_t ilog_e(uint64_t v)
 255 {
 256     uint32_t i, r = 0;
 257
 258     /*
 259      * Scale down the value into the range 1 .. 2.
 260      *
 261      * If fractional numbers need to be processed, another loop needs
 262      * to go here that checks v < scale and if so multiplies it by 2 and
 263      * reduces r by scale.  This also means making r signed.
 264      */
 265     while (v >= 2 * scale) {
 266         v >>= 1;
 267         r += scale;
 268     }
 269     for (i = scale / 2; i != 0; i /= 2) {
 270         v = mul2(v, v);
 271         if (v >= 2 * scale) {
 272             v >>= 1;
 273             r += i;
 274         }
 275     }
 276     r = (r * (uint64_t)scale) / log_e;
 277     return r;
 278 }
 279
 280 /*
 281  * NIST SP 800-56B rev 2 Appendix D: Maximum Security Strength Estimates for IFC
 282  * Modulus Lengths.
 283  *
 284  * E = \frac{1.923 \sqrt[3]{nBits \cdot log_e(2)}
 285  *           \cdot(log_e(nBits \cdot log_e(2))^{2/3} - 4.69}{log_e(2)}
 286  * The two cube roots are merged together here.
 287  */
 288 uint16_t rsa_compute_security_bits(int n)
 289 {
 290     uint64_t x;
 291     uint32_t lx;
 292     uint16_t y;
 293
 294     /* Look for common values as listed in SP 800-56B rev 2 Appendix D */
 295     switch (n) {
 296     case 2048:
 297         return 112;
 298     case 3072:
 299         return 128;
 300     case 4096:
 301         return 152;
 302     case 6144:
 303         return 176;
 304     case 8192:
 305         return 200;
 306     }
 307     /*
 308      * The first incorrect result (i.e. not accurate or off by one low) occurs
 309      * for n = 699668.  The true value here is 1200.  Instead of using this n
 310      * as the check threshold, the smallest n such that the correct result is
 311      * 1200 is used instead.
 312      */
 313     if (n >= 687737)
 314         return 1200;
 315     if (n < 8)
 316         return 0;
 317
 318     x = n * (uint64_t)log_2;
 319     lx = ilog_e(x);
 320     y = (uint16_t)((mul2(c1_923, icbrt64(mul2(mul2(x, lx), lx))) - c4_690)
 321                    / log_2);
 322     return (y + 4) & ~7;
 323 }
 324
 325 int RSA_security_bits(const RSA *rsa)
 326 {
 327     int bits = BN_num_bits(rsa->n);
 328
 329 #ifndef FIPS_MODE
 330     if (rsa->version == RSA_ASN1_VERSION_MULTI) {
 331         /* This ought to mean that we have private key at hand. */
 332         int ex_primes = sk_RSA_PRIME_INFO_num(rsa->prime_infos);
 333
 334         if (ex_primes <= 0 || (ex_primes + 2) > rsa_multip_cap(bits))
 335             return 0;
 336     }
 337 #endif
 338     return rsa_compute_security_bits(bits);
 339 }
 340
 341 int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d)
 342 {
 343     /* If the fields n and e in r are NULL, the corresponding input
 344      * parameters MUST be non-NULL for n and e.  d may be
 345      * left NULL (in case only the public key is used).
 346      */
 347     if ((r->n == NULL && n == NULL)
 348         || (r->e == NULL && e == NULL))
 349         return 0;
 350
 351     if (n != NULL) {
 352         BN_free(r->n);
 353         r->n = n;
 354     }
 355     if (e != NULL) {
 356         BN_free(r->e);
 357         r->e = e;
 358     }
 359     if (d != NULL) {
 360         BN_clear_free(r->d);
 361         r->d = d;
 362         BN_set_flags(r->d, BN_FLG_CONSTTIME);
 363     }
 364     r->dirty_cnt++;
 365
 366     return 1;
 367 }
 368
 369 int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q)
 370 {
 371     /* If the fields p and q in r are NULL, the corresponding input
 372      * parameters MUST be non-NULL.
 373      */
 374     if ((r->p == NULL && p == NULL)
 375         || (r->q == NULL && q == NULL))
 376         return 0;
 377
 378     if (p != NULL) {
 379         BN_clear_free(r->p);
 380         r->p = p;
 381         BN_set_flags(r->p, BN_FLG_CONSTTIME);
 382     }
 383     if (q != NULL) {
 384         BN_clear_free(r->q);
 385         r->q = q;
 386         BN_set_flags(r->q, BN_FLG_CONSTTIME);
 387     }
 388     r->dirty_cnt++;
 389
 390     return 1;
 391 }
 392
 393 int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp)
 394 {
 395     /* If the fields dmp1, dmq1 and iqmp in r are NULL, the corresponding input
 396      * parameters MUST be non-NULL.
 397      */
 398     if ((r->dmp1 == NULL && dmp1 == NULL)
 399         || (r->dmq1 == NULL && dmq1 == NULL)
 400         || (r->iqmp == NULL && iqmp == NULL))
 401         return 0;
 402
 403     if (dmp1 != NULL) {
 404         BN_clear_free(r->dmp1);
 405         r->dmp1 = dmp1;
 406         BN_set_flags(r->dmp1, BN_FLG_CONSTTIME);
 407     }
 408     if (dmq1 != NULL) {
 409         BN_clear_free(r->dmq1);
 410         r->dmq1 = dmq1;
 411         BN_set_flags(r->dmq1, BN_FLG_CONSTTIME);
 412     }
 413     if (iqmp != NULL) {
 414         BN_clear_free(r->iqmp);
 415         r->iqmp = iqmp;
 416         BN_set_flags(r->iqmp, BN_FLG_CONSTTIME);
 417     }
 418     r->dirty_cnt++;
 419
 420     return 1;
 421 }
 422
 423 #ifndef FIPS_MODE
 424 /*
 425  * Is it better to export RSA_PRIME_INFO structure
 426  * and related functions to let user pass a triplet?
 427  */
 428 int RSA_set0_multi_prime_params(RSA *r, BIGNUM *primes[], BIGNUM *exps[],
 429                                 BIGNUM *coeffs[], int pnum)
 430 {
 431     STACK_OF(RSA_PRIME_INFO) *prime_infos, *old = NULL;
 432     RSA_PRIME_INFO *pinfo;
 433     int i;
 434
 435     if (primes == NULL || exps == NULL || coeffs == NULL || pnum == 0)
 436         return 0;
 437
 438     prime_infos = sk_RSA_PRIME_INFO_new_reserve(NULL, pnum);
 439     if (prime_infos == NULL)
 440         return 0;
 441
 442     if (r->prime_infos != NULL)
 443         old = r->prime_infos;
 444
 445     for (i = 0; i < pnum; i++) {
 446         pinfo = rsa_multip_info_new();
 447         if (pinfo == NULL)
 448             goto err;
 449         if (primes[i] != NULL && exps[i] != NULL && coeffs[i] != NULL) {
 450             BN_clear_free(pinfo->r);
 451             BN_clear_free(pinfo->d);
 452             BN_clear_free(pinfo->t);
 453             pinfo->r = primes[i];
 454             pinfo->d = exps[i];
 455             pinfo->t = coeffs[i];
 456             BN_set_flags(pinfo->r, BN_FLG_CONSTTIME);
 457             BN_set_flags(pinfo->d, BN_FLG_CONSTTIME);
 458             BN_set_flags(pinfo->t, BN_FLG_CONSTTIME);
 459         } else {
 460             rsa_multip_info_free(pinfo);
 461             goto err;
 462         }
 463         (void)sk_RSA_PRIME_INFO_push(prime_infos, pinfo);
 464     }
 465
 466     r->prime_infos = prime_infos;
 467
 468     if (!rsa_multip_calc_product(r)) {
 469         r->prime_infos = old;
 470         goto err;
 471     }
 472
 473     if (old != NULL) {
 474         /*
 475          * This is hard to deal with, since the old infos could
 476          * also be set by this function and r, d, t should not
 477          * be freed in that case. So currently, stay consistent
 478          * with other *set0* functions: just free it...
 479          */
 480         sk_RSA_PRIME_INFO_pop_free(old, rsa_multip_info_free);
 481     }
 482
 483     r->version = RSA_ASN1_VERSION_MULTI;
 484     r->dirty_cnt++;
 485
 486     return 1;
 487  err:
 488     /* r, d, t should not be freed */
 489     sk_RSA_PRIME_INFO_pop_free(prime_infos, rsa_multip_info_free_ex);
 490     return 0;
 491 }
 492 #endif
 493
 494 void RSA_get0_key(const RSA *r,
 495                   const BIGNUM **n, const BIGNUM **e, const BIGNUM **d)
 496 {
 497     if (n != NULL)
 498         *n = r->n;
 499     if (e != NULL)
 500         *e = r->e;
 501     if (d != NULL)
 502         *d = r->d;
 503 }
 504
 505 void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q)
 506 {
 507     if (p != NULL)
 508         *p = r->p;
 509     if (q != NULL)
 510         *q = r->q;
 511 }
 512
 513 #ifndef FIPS_MODE
 514 int RSA_get_multi_prime_extra_count(const RSA *r)
 515 {
 516     int pnum;
 517
 518     pnum = sk_RSA_PRIME_INFO_num(r->prime_infos);
 519     if (pnum <= 0)
 520         pnum = 0;
 521     return pnum;
 522 }
 523
 524 int RSA_get0_multi_prime_factors(const RSA *r, const BIGNUM *primes[])
 525 {
 526     int pnum, i;
 527     RSA_PRIME_INFO *pinfo;
 528
 529     if ((pnum = RSA_get_multi_prime_extra_count(r)) == 0)
 530         return 0;
 531
 532     /*
 533      * return other primes
 534      * it's caller's responsibility to allocate oth_primes[pnum]
 535      */
 536     for (i = 0; i < pnum; i++) {
 537         pinfo = sk_RSA_PRIME_INFO_value(r->prime_infos, i);
 538         primes[i] = pinfo->r;
 539     }
 540
 541     return 1;
 542 }
 543 #endif
 544
 545 void RSA_get0_crt_params(const RSA *r,
 546                          const BIGNUM **dmp1, const BIGNUM **dmq1,
 547                          const BIGNUM **iqmp)
 548 {
 549     if (dmp1 != NULL)
 550         *dmp1 = r->dmp1;
 551     if (dmq1 != NULL)
 552         *dmq1 = r->dmq1;
 553     if (iqmp != NULL)
 554         *iqmp = r->iqmp;
 555 }
 556
 557 #ifndef FIPS_MODE
 558 int RSA_get0_multi_prime_crt_params(const RSA *r, const BIGNUM *exps[],
 559                                     const BIGNUM *coeffs[])
 560 {
 561     int pnum;
 562
 563     if ((pnum = RSA_get_multi_prime_extra_count(r)) == 0)
 564         return 0;
 565
 566     /* return other primes */
 567     if (exps != NULL || coeffs != NULL) {
 568         RSA_PRIME_INFO *pinfo;
 569         int i;
 570
 571         /* it's the user's job to guarantee the buffer length */
 572         for (i = 0; i < pnum; i++) {
 573             pinfo = sk_RSA_PRIME_INFO_value(r->prime_infos, i);
 574             if (exps != NULL)
 575                 exps[i] = pinfo->d;
 576             if (coeffs != NULL)
 577                 coeffs[i] = pinfo->t;
 578         }
 579     }
 580
 581     return 1;
 582 }
 583 #endif
 584
 585 const BIGNUM *RSA_get0_n(const RSA *r)
 586 {
 587     return r->n;
 588 }
 589
 590 const BIGNUM *RSA_get0_e(const RSA *r)
 591 {
 592     return r->e;
 593 }
 594
 595 const BIGNUM *RSA_get0_d(const RSA *r)
 596 {
 597     return r->d;
 598 }
 599
 600 const BIGNUM *RSA_get0_p(const RSA *r)
 601 {
 602     return r->p;
 603 }
 604
 605 const BIGNUM *RSA_get0_q(const RSA *r)
 606 {
 607     return r->q;
 608 }
 609
 610 const BIGNUM *RSA_get0_dmp1(const RSA *r)
 611 {
 612     return r->dmp1;
 613 }
 614
 615 const BIGNUM *RSA_get0_dmq1(const RSA *r)
 616 {
 617     return r->dmq1;
 618 }
 619
 620 const BIGNUM *RSA_get0_iqmp(const RSA *r)
 621 {
 622     return r->iqmp;
 623 }
 624
 625 /* TODO(3.0): Temporary until we move PSS support into the FIPS module */
 626 #ifndef FIPS_MODE
 627 const RSA_PSS_PARAMS *RSA_get0_pss_params(const RSA *r)
 628 {
 629     return r->pss;
 630 }
 631 #endif
 632
 633 void RSA_clear_flags(RSA *r, int flags)
 634 {
 635     r->flags &= ~flags;
 636 }
 637
 638 int RSA_test_flags(const RSA *r, int flags)
 639 {
 640     return r->flags & flags;
 641 }
 642
 643 void RSA_set_flags(RSA *r, int flags)
 644 {
 645     r->flags |= flags;
 646 }
 647
 648 int RSA_get_version(RSA *r)
 649 {
 650     /* { two-prime(0), multi(1) } */
 651     return r->version;
 652 }
 653
 654 #ifndef FIPS_MODE
 655 ENGINE *RSA_get0_engine(const RSA *r)
 656 {
 657     return r->engine;
 658 }
 659
 660 int RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2)
 661 {
 662     /* If key type not RSA or RSA-PSS return error */
 663     if (ctx != NULL && ctx->pmeth != NULL
 664         && ctx->pmeth->pkey_id != EVP_PKEY_RSA
 665         && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
 666         return -1;
 667      return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, p1, p2);
 668 }
 669 #endif
 670
 671 DEFINE_STACK_OF(BIGNUM)
 672
 673 int rsa_set0_all_params(RSA *r, const STACK_OF(BIGNUM) *primes,
 674                         const STACK_OF(BIGNUM) *exps,
 675                         const STACK_OF(BIGNUM) *coeffs)
 676 {
 677 #ifndef FIPS_MODE
 678     STACK_OF(RSA_PRIME_INFO) *prime_infos, *old_infos = NULL;
 679 #endif
 680     int pnum;
 681
 682     if (primes == NULL || exps == NULL || coeffs == NULL)
 683         return 0;
 684
 685     pnum = sk_BIGNUM_num(primes);
 686     if (pnum < 2
 687         || pnum != sk_BIGNUM_num(exps)
 688         || pnum != sk_BIGNUM_num(coeffs) + 1)
 689         return 0;
 690
 691     if (!RSA_set0_factors(r, sk_BIGNUM_value(primes, 0),
 692                           sk_BIGNUM_value(primes, 1))
 693         || !RSA_set0_crt_params(r, sk_BIGNUM_value(exps, 0),
 694                                 sk_BIGNUM_value(exps, 1),
 695                                 sk_BIGNUM_value(coeffs, 0)))
 696         return 0;
 697
 698 #ifndef FIPS_MODE
 699     old_infos = r->prime_infos;
 700 #endif
 701
 702     if (pnum > 2) {
 703 #ifndef FIPS_MODE
 704         int i;
 705
 706         prime_infos = sk_RSA_PRIME_INFO_new_reserve(NULL, pnum);
 707         if (prime_infos == NULL)
 708             return 0;
 709
 710         for (i = 2; i < pnum; i++) {
 711             BIGNUM *prime = sk_BIGNUM_value(primes, i);
 712             BIGNUM *exp = sk_BIGNUM_value(exps, i);
 713             BIGNUM *coeff = sk_BIGNUM_value(coeffs, i - 1);
 714             RSA_PRIME_INFO *pinfo = NULL;
 715
 716             if (!ossl_assert(prime != NULL && exp != NULL && coeff != NULL))
 717                 goto err;
 718
 719             /* Using rsa_multip_info_new() is wasteful, so allocate directly */
 720             if ((pinfo = OPENSSL_zalloc(sizeof(*pinfo))) == NULL) {
 721                 ERR_raise(ERR_LIB_RSA, ERR_R_MALLOC_FAILURE);
 722                 goto err;
 723             }
 724
 725             pinfo->r = prime;
 726             pinfo->d = exp;
 727             pinfo->t = coeff;
 728             BN_set_flags(pinfo->r, BN_FLG_CONSTTIME);
 729             BN_set_flags(pinfo->d, BN_FLG_CONSTTIME);
 730             BN_set_flags(pinfo->t, BN_FLG_CONSTTIME);
 731             (void)sk_RSA_PRIME_INFO_push(prime_infos, pinfo);
 732         }
 733
 734         r->prime_infos = prime_infos;
 735
 736         if (!rsa_multip_calc_product(r)) {
 737             r->prime_infos = old_infos;
 738             goto err;
 739         }
 740 #else
 741         return 0;
 742 #endif
 743     }
 744
 745 #ifndef FIPS_MODE
 746     if (old_infos != NULL) {
 747         /*
 748          * This is hard to deal with, since the old infos could
 749          * also be set by this function and r, d, t should not
 750          * be freed in that case. So currently, stay consistent
 751          * with other *set0* functions: just free it...
 752          */
 753         sk_RSA_PRIME_INFO_pop_free(old_infos, rsa_multip_info_free);
 754     }
 755 #endif
 756
 757     r->version = pnum > 2 ? RSA_ASN1_VERSION_MULTI : RSA_ASN1_VERSION_DEFAULT;
 758     r->dirty_cnt++;
 759
 760     return 1;
 761 #ifndef FIPS_MODE
 762  err:
 763     /* r, d, t should not be freed */
 764     sk_RSA_PRIME_INFO_pop_free(prime_infos, rsa_multip_info_free_ex);
 765     return 0;
 766 #endif
 767 }
 768
 769 DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
 770
 771 int rsa_get0_all_params(RSA *r, STACK_OF(BIGNUM_const) *primes,
 772                         STACK_OF(BIGNUM_const) *exps,
 773                         STACK_OF(BIGNUM_const) *coeffs)
 774 {
 775 #ifndef FIPS_MODE
 776     RSA_PRIME_INFO *pinfo;
 777     int i, pnum;
 778 #endif
 779
 780     if (r == NULL)
 781         return 0;
 782
 783     /* If |p| is NULL, there are no CRT parameters */
 784     if (RSA_get0_p(r) == NULL)
 785         return 1;
 786
 787     sk_BIGNUM_const_push(primes, RSA_get0_p(r));
 788     sk_BIGNUM_const_push(primes, RSA_get0_q(r));
 789     sk_BIGNUM_const_push(exps, RSA_get0_dmp1(r));
 790     sk_BIGNUM_const_push(exps, RSA_get0_dmq1(r));
 791     sk_BIGNUM_const_push(coeffs, RSA_get0_iqmp(r));
 792
 793 #ifndef FIPS_MODE
 794     pnum = RSA_get_multi_prime_extra_count(r);
 795     for (i = 0; i < pnum; i++) {
 796         pinfo = sk_RSA_PRIME_INFO_value(r->prime_infos, i);
 797         sk_BIGNUM_const_push(primes, pinfo->r);
 798         sk_BIGNUM_const_push(exps, pinfo->d);
 799         sk_BIGNUM_const_push(coeffs, pinfo->t);
 800     }
 801 #endif
 802
 803     return 1;
 804 }
 805
 806 #ifndef FIPS_MODE
 807 int EVP_PKEY_CTX_set_rsa_padding(EVP_PKEY_CTX *ctx, int pad_mode)
 808 {
 809     OSSL_PARAM pad_params[2], *p = pad_params;
 810
 811     if (ctx == NULL) {
 812         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 813         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 814         return -2;
 815     }
 816
 817     /* If key type not RSA or RSA-PSS return error */
 818     if (ctx->pmeth != NULL
 819             && ctx->pmeth->pkey_id != EVP_PKEY_RSA
 820             && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
 821         return -1;
 822
 823     /* TODO(3.0): Remove this eventually when no more legacy */
 824     if ((!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 825          || ctx->op.ciph.ciphprovctx == NULL)
 826         && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 827             || ctx->op.sig.sigprovctx == NULL))
 828         return EVP_PKEY_CTX_ctrl(ctx, -1, -1, EVP_PKEY_CTRL_RSA_PADDING,
 829                                  pad_mode, NULL);
 830
 831     *p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_PAD_MODE, &pad_mode);
 832     *p++ = OSSL_PARAM_construct_end();
 833
 834     return EVP_PKEY_CTX_set_params(ctx, pad_params);
 835 }
 836
 837 int EVP_PKEY_CTX_get_rsa_padding(EVP_PKEY_CTX *ctx, int *pad_mode)
 838 {
 839     OSSL_PARAM pad_params[2], *p = pad_params;
 840
 841     if (ctx == NULL || pad_mode == NULL) {
 842         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 843         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 844         return -2;
 845     }
 846
 847     /* If key type not RSA or RSA-PSS return error */
 848     if (ctx->pmeth != NULL
 849             && ctx->pmeth->pkey_id != EVP_PKEY_RSA
 850             && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
 851         return -1;
 852
 853     /* TODO(3.0): Remove this eventually when no more legacy */
 854     if ((!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 855          || ctx->op.ciph.ciphprovctx == NULL)
 856         && (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
 857             || ctx->op.sig.sigprovctx == NULL))
 858         return EVP_PKEY_CTX_ctrl(ctx, -1, -1, EVP_PKEY_CTRL_GET_RSA_PADDING, 0,
 859                                  pad_mode);
 860
 861     *p++ = OSSL_PARAM_construct_int(OSSL_PKEY_PARAM_PAD_MODE, pad_mode);
 862     *p++ = OSSL_PARAM_construct_end();
 863
 864     if (!EVP_PKEY_CTX_get_params(ctx, pad_params))
 865         return 0;
 866
 867     return 1;
 868
 869 }
 870
 871 int EVP_PKEY_CTX_set_rsa_oaep_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
 872 {
 873     const char *name;
 874
 875     if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) {
 876         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 877         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 878         return -2;
 879     }
 880
 881     /* If key type not RSA return error */
 882     if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA)
 883         return -1;
 884
 885     /* TODO(3.0): Remove this eventually when no more legacy */
 886     if (ctx->op.ciph.ciphprovctx == NULL)
 887         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,
 888                                  EVP_PKEY_CTRL_RSA_OAEP_MD, 0, (void *)md);
 889
 890     name = (md == NULL) ? "" : EVP_MD_name(md);
 891
 892     return EVP_PKEY_CTX_set_rsa_oaep_md_name(ctx, name, NULL);
 893 }
 894
 895 int EVP_PKEY_CTX_set_rsa_oaep_md_name(EVP_PKEY_CTX *ctx, const char *mdname,
 896                                       const char *mdprops)
 897 {
 898     OSSL_PARAM rsa_params[3], *p = rsa_params;
 899
 900     if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) {
 901         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 902         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 903         return -2;
 904     }
 905
 906     /* If key type not RSA return error */
 907     if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA)
 908         return -1;
 909
 910
 911     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST,
 912                                             /*
 913                                              * Cast away the const. This is read
 914                                              * only so should be safe
 915                                              */
 916                                             (char *)mdname, 0);
 917     if (mdprops != NULL) {
 918         *p++ = OSSL_PARAM_construct_utf8_string(
 919                     OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST_PROPS,
 920                     /*
 921                      * Cast away the const. This is read
 922                      * only so should be safe
 923                      */
 924                     (char *)mdprops, 0);
 925     }
 926     *p++ = OSSL_PARAM_construct_end();
 927
 928     return EVP_PKEY_CTX_set_params(ctx, rsa_params);
 929 }
 930
 931 int EVP_PKEY_CTX_get_rsa_oaep_md_name(EVP_PKEY_CTX *ctx, char *name,
 932                                       size_t namelen)
 933 {
 934     OSSL_PARAM rsa_params[2], *p = rsa_params;
 935
 936     if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) {
 937         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 938         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 939         return -2;
 940     }
 941
 942     /* If key type not RSA return error */
 943     if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA)
 944         return -1;
 945
 946     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_ASYM_CIPHER_PARAM_OAEP_DIGEST,
 947                                             name, namelen);
 948     *p++ = OSSL_PARAM_construct_end();
 949
 950     if (!EVP_PKEY_CTX_get_params(ctx, rsa_params))
 951         return -1;
 952
 953     return 1;
 954 }
 955
 956 int EVP_PKEY_CTX_get_rsa_oaep_md(EVP_PKEY_CTX *ctx, const EVP_MD **md)
 957 {
 958     /* 80 should be big enough */
 959     char name[80] = "";
 960
 961     if (ctx == NULL || md == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) {
 962         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 963         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 964         return -2;
 965     }
 966
 967     /* If key type not RSA return error */
 968     if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA)
 969         return -1;
 970
 971     /* TODO(3.0): Remove this eventually when no more legacy */
 972     if (ctx->op.ciph.ciphprovctx == NULL)
 973         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,
 974                                  EVP_PKEY_CTRL_GET_RSA_OAEP_MD, 0, (void *)md);
 975
 976     if (EVP_PKEY_CTX_get_rsa_oaep_md_name(ctx, name, sizeof(name)) <= 0)
 977         return -1;
 978
 979     /* May be NULL meaning "unknown" */
 980     *md = EVP_get_digestbyname(name);
 981
 982     return 1;
 983 }
 984
 985 int EVP_PKEY_CTX_set_rsa_mgf1_md(EVP_PKEY_CTX *ctx, const EVP_MD *md)
 986 {
 987     const char *name;
 988
 989     if (ctx == NULL
 990             || (!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
 991                 && !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx))) {
 992         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
 993         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
 994         return -2;
 995     }
 996
 997     /* If key type not RSA return error */
 998     if (ctx->pmeth != NULL
 999             && ctx->pmeth->pkey_id != EVP_PKEY_RSA
1000             && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
1001         return -1;
1002
1003     /* TODO(3.0): Remove this eventually when no more legacy */
1004     if ((EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
1005                 && ctx->op.ciph.ciphprovctx == NULL)
1006             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
1007                 && ctx->op.sig.sigprovctx == NULL))
1008         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA,
1009                                  EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT,
1010                                  EVP_PKEY_CTRL_RSA_MGF1_MD, 0, (void *)md);
1011
1012     name = (md == NULL) ? "" : EVP_MD_name(md);
1013
1014     return EVP_PKEY_CTX_set_rsa_mgf1_md_name(ctx, name, NULL);
1015 }
1016
1017 int EVP_PKEY_CTX_set_rsa_mgf1_md_name(EVP_PKEY_CTX *ctx, const char *mdname,
1018                                       const char *mdprops)
1019 {
1020     OSSL_PARAM rsa_params[3], *p = rsa_params;
1021
1022     if (ctx == NULL
1023             || mdname == NULL
1024             || (!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
1025                 && !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx))) {
1026         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1027         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1028         return -2;
1029     }
1030
1031     /* If key type not RSA return error */
1032     if (ctx->pmeth != NULL
1033             && ctx->pmeth->pkey_id != EVP_PKEY_RSA
1034             && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
1035         return -1;
1036
1037     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_MGF1_DIGEST,
1038                                             /*
1039                                              * Cast away the const. This is
1040                                              * read only so should be safe
1041                                              */
1042                                             (char *)mdname, 0);
1043     if (mdprops != NULL) {
1044         *p++ =
1045             OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_MGF1_PROPERTIES,
1046                                              /*
1047                                               * Cast away the const. This is
1048                                               * read only so should be safe
1049                                               */
1050                                              (char *)mdprops, 0);
1051     }
1052     *p++ = OSSL_PARAM_construct_end();
1053
1054     return EVP_PKEY_CTX_set_params(ctx, rsa_params);
1055 }
1056
1057 int EVP_PKEY_CTX_get_rsa_mgf1_md_name(EVP_PKEY_CTX *ctx, char *name,
1058                                       size_t namelen)
1059 {
1060     OSSL_PARAM rsa_params[2], *p = rsa_params;
1061
1062     if (ctx == NULL
1063             || (!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
1064                 && !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx))) {
1065         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1066         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1067         return -2;
1068     }
1069
1070     /* If key type not RSA or RSA-PSS return error */
1071     if (ctx->pmeth != NULL
1072             && ctx->pmeth->pkey_id != EVP_PKEY_RSA
1073             && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
1074         return -1;
1075
1076     *p++ = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_MGF1_DIGEST,
1077                                             name, namelen);
1078     *p++ = OSSL_PARAM_construct_end();
1079
1080     if (!EVP_PKEY_CTX_get_params(ctx, rsa_params))
1081         return -1;
1082
1083     return 1;
1084 }
1085
1086 int EVP_PKEY_CTX_get_rsa_mgf1_md(EVP_PKEY_CTX *ctx, const EVP_MD **md)
1087 {
1088     /* 80 should be big enough */
1089     char name[80] = "";
1090
1091     if (ctx == NULL
1092             || (!EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
1093                 && !EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx))) {
1094         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1095         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1096         return -2;
1097     }
1098
1099     /* If key type not RSA or RSA-PSS return error */
1100     if (ctx->pmeth != NULL
1101             && ctx->pmeth->pkey_id != EVP_PKEY_RSA
1102             && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
1103         return -1;
1104
1105     /* TODO(3.0): Remove this eventually when no more legacy */
1106     if ((EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)
1107                 && ctx->op.ciph.ciphprovctx == NULL)
1108             || (EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
1109                 && ctx->op.sig.sigprovctx == NULL))
1110         return EVP_PKEY_CTX_ctrl(ctx, -1,
1111                                  EVP_PKEY_OP_TYPE_SIG | EVP_PKEY_OP_TYPE_CRYPT,
1112                                  EVP_PKEY_CTRL_GET_RSA_MGF1_MD, 0, (void *)md);
1113
1114     if (EVP_PKEY_CTX_get_rsa_mgf1_md_name(ctx, name, sizeof(name)) <= 0)
1115         return -1;
1116
1117     /* May be NULL meaning "unknown" */
1118     *md = EVP_get_digestbyname(name);
1119
1120     return 1;
1121 }
1122
1123 int EVP_PKEY_CTX_set0_rsa_oaep_label(EVP_PKEY_CTX *ctx, void *label, int llen)
1124 {
1125     OSSL_PARAM rsa_params[2], *p = rsa_params;
1126
1127     if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) {
1128         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1129         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1130         return -2;
1131     }
1132
1133     /* If key type not RSA return error */
1134     if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA)
1135         return -1;
1136
1137     /* TODO(3.0): Remove this eventually when no more legacy */
1138     if (ctx->op.ciph.ciphprovctx == NULL)
1139         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,
1140                                  EVP_PKEY_CTRL_RSA_OAEP_LABEL, llen,
1141                                  (void *)label);
1142
1143     *p++ = OSSL_PARAM_construct_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL,
1144                                              /*
1145                                               * Cast away the const. This is
1146                                               * read only so should be safe
1147                                               */
1148                                              (void *)label,
1149                                              (size_t)llen);
1150     *p++ = OSSL_PARAM_construct_end();
1151
1152     if (!EVP_PKEY_CTX_set_params(ctx, rsa_params))
1153         return 0;
1154
1155     OPENSSL_free(label);
1156     return 1;
1157 }
1158
1159 int EVP_PKEY_CTX_get0_rsa_oaep_label(EVP_PKEY_CTX *ctx, unsigned char **label)
1160 {
1161     OSSL_PARAM rsa_params[3], *p = rsa_params;
1162     size_t labellen;
1163
1164     if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) {
1165         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1166         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1167         return -2;
1168     }
1169
1170     /* If key type not RSA return error */
1171     if (ctx->pmeth != NULL && ctx->pmeth->pkey_id != EVP_PKEY_RSA)
1172         return -1;
1173
1174     /* TODO(3.0): Remove this eventually when no more legacy */
1175     if (ctx->op.ciph.ciphprovctx == NULL)
1176         return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_RSA, EVP_PKEY_OP_TYPE_CRYPT,
1177                                  EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL, 0,
1178                                  (void *)label);
1179
1180     *p++ = OSSL_PARAM_construct_octet_ptr(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL,
1181                                           (void **)label, 0);
1182     *p++ = OSSL_PARAM_construct_size_t(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL_LEN,
1183                                        &labellen);
1184     *p++ = OSSL_PARAM_construct_end();
1185
1186     if (!EVP_PKEY_CTX_get_params(ctx, rsa_params))
1187         return -1;
1188
1189     if (labellen > INT_MAX)
1190         return -1;
1191
1192     return (int)labellen;
1193 }
1194
1195 int EVP_PKEY_CTX_set_rsa_pss_saltlen(EVP_PKEY_CTX *ctx, int saltlen)
1196 {
1197     OSSL_PARAM pad_params[2], *p = pad_params;
1198
1199     if (ctx == NULL) {
1200         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1201         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1202         return -2;
1203     }
1204
1205     /* If key type not RSA or RSA-PSS return error */
1206     if (ctx->pmeth != NULL
1207             && ctx->pmeth->pkey_id != EVP_PKEY_RSA
1208             && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
1209         return -1;
1210
1211     /* TODO(3.0): Remove this eventually when no more legacy */
1212     if (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
1213         || ctx->op.sig.sigprovctx == NULL)
1214         return EVP_PKEY_CTX_ctrl(ctx, -1, -1, EVP_PKEY_CTRL_RSA_PSS_SALTLEN,
1215                                  saltlen, NULL);
1216
1217     *p++ =
1218         OSSL_PARAM_construct_int(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, &saltlen);
1219     *p++ = OSSL_PARAM_construct_end();
1220
1221     return EVP_PKEY_CTX_set_params(ctx, pad_params);
1222 }
1223
1224 int EVP_PKEY_CTX_get_rsa_pss_saltlen(EVP_PKEY_CTX *ctx, int *saltlen)
1225 {
1226     OSSL_PARAM pad_params[2], *p = pad_params;
1227
1228     if (ctx == NULL || saltlen == NULL) {
1229         ERR_raise(ERR_LIB_EVP, EVP_R_COMMAND_NOT_SUPPORTED);
1230         /* Uses the same return values as EVP_PKEY_CTX_ctrl */
1231         return -2;
1232     }
1233
1234     /* If key type not RSA or RSA-PSS return error */
1235     if (ctx->pmeth != NULL
1236             && ctx->pmeth->pkey_id != EVP_PKEY_RSA
1237             && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
1238         return -1;
1239
1240     /* TODO(3.0): Remove this eventually when no more legacy */
1241     if (!EVP_PKEY_CTX_IS_SIGNATURE_OP(ctx)
1242         || ctx->op.sig.sigprovctx == NULL)
1243         return EVP_PKEY_CTX_ctrl(ctx, -1, -1,
1244                                  EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN,
1245                                  0, saltlen);
1246
1247     *p++ =
1248         OSSL_PARAM_construct_int(OSSL_SIGNATURE_PARAM_PSS_SALTLEN, saltlen);
1249     *p++ = OSSL_PARAM_construct_end();
1250
1251     if (!EVP_PKEY_CTX_get_params(ctx, pad_params))
1252         return 0;
1253
1254     return 1;
1255
1256 }
1257 #endif