1 files changed, 379 insertions, 237 deletions

diff --git a/crypto/rsa/rsa_lib.c b/crypto/rsa/rsa_lib.c
index 6ea6b40dc6fd..72d1b5e0715d 100644
--- a/crypto/rsa/rsa_lib.c
+++ b/crypto/rsa/rsa_lib.c
@@ -1,110 +1,25 @@
-/* crypto/rsa/rsa_lib.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
  *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
  */
 
 #include <stdio.h>
 #include <openssl/crypto.h>
-#include "cryptlib.h"
-#include <openssl/lhash.h>
-#include <openssl/bn.h>
-#include <openssl/rsa.h>
-#include <openssl/rand.h>
-#ifndef OPENSSL_NO_ENGINE
-# include <openssl/engine.h>
-#endif
-
-#ifdef OPENSSL_FIPS
-# include <openssl/fips.h>
-#endif
-
-const char RSA_version[] = "RSA" OPENSSL_VERSION_PTEXT;
-
-static const RSA_METHOD *default_RSA_meth = NULL;
+#include "internal/cryptlib.h"
+#include "internal/refcount.h"
+#include "internal/bn_int.h"
+#include <openssl/engine.h>
+#include <openssl/evp.h>
+#include "internal/evp_int.h"
+#include "rsa_locl.h"
 
 RSA *RSA_new(void)
 {
-    RSA *r = RSA_new_method(NULL);
-
-    return r;
-}
-
-void RSA_set_default_method(const RSA_METHOD *meth)
-{
-    default_RSA_meth = meth;
-}
-
-const RSA_METHOD *RSA_get_default_method(void)
-{
-    if (default_RSA_meth == NULL) {
-#ifdef OPENSSL_FIPS
-        if (FIPS_mode())
-            return FIPS_rsa_pkcs1_ssleay();
-        else
-            return RSA_PKCS1_SSLeay();
-#else
-# ifdef RSA_NULL
-        default_RSA_meth = RSA_null_method();
-# else
-        default_RSA_meth = RSA_PKCS1_SSLeay();
-# endif
-#endif
-    }
-
-    return default_RSA_meth;
+    return RSA_new_method(NULL);
 }
 
 const RSA_METHOD *RSA_get_method(const RSA *rsa)
@@ -123,10 +38,8 @@ int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
     if (mtmp->finish)
         mtmp->finish(rsa);
 #ifndef OPENSSL_NO_ENGINE
-    if (rsa->engine) {
-        ENGINE_finish(rsa->engine);
-        rsa->engine = NULL;
-    }
+    ENGINE_finish(rsa->engine);
+    rsa->engine = NULL;
 #endif
     rsa->meth = meth;
     if (meth->init)
@@ -136,74 +49,57 @@ int RSA_set_method(RSA *rsa, const RSA_METHOD *meth)
 
 RSA *RSA_new_method(ENGINE *engine)
 {
-    RSA *ret;
+    RSA *ret = OPENSSL_zalloc(sizeof(*ret));
 
-    ret = (RSA *)OPENSSL_malloc(sizeof(RSA));
     if (ret == NULL) {
         RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
         return NULL;
     }
-    memset(ret,0,sizeof(RSA));
+
+    ret->references = 1;
+    ret->lock = CRYPTO_THREAD_lock_new();
+    if (ret->lock == NULL) {
+        RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_MALLOC_FAILURE);
+        OPENSSL_free(ret);
+        return NULL;
+    }
 
     ret->meth = RSA_get_default_method();
 #ifndef OPENSSL_NO_ENGINE
+    ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
     if (engine) {
         if (!ENGINE_init(engine)) {
             RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
-            OPENSSL_free(ret);
-            return NULL;
+            goto err;
         }
         ret->engine = engine;
-    } else
+    } else {
         ret->engine = ENGINE_get_default_RSA();
+    }
     if (ret->engine) {
         ret->meth = ENGINE_get_RSA(ret->engine);
-        if (!ret->meth) {
+        if (ret->meth == NULL) {
             RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_ENGINE_LIB);
-            ENGINE_finish(ret->engine);
-            OPENSSL_free(ret);
-            return NULL;
+            goto err;
         }
     }
 #endif
 
-    ret->pad = 0;
-    ret->version = 0;
-    ret->n = NULL;
-    ret->e = NULL;
-    ret->d = NULL;
-    ret->p = NULL;
-    ret->q = NULL;
-    ret->dmp1 = NULL;
-    ret->dmq1 = NULL;
-    ret->iqmp = NULL;
-    ret->references = 1;
-    ret->_method_mod_n = NULL;
-    ret->_method_mod_p = NULL;
-    ret->_method_mod_q = NULL;
-    ret->blinding = NULL;
-    ret->mt_blinding = NULL;
-    ret->bignum_data = NULL;
     ret->flags = ret->meth->flags & ~RSA_FLAG_NON_FIPS_ALLOW;
     if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data)) {
-#ifndef OPENSSL_NO_ENGINE
-        if (ret->engine)
-            ENGINE_finish(ret->engine);
-#endif
-        OPENSSL_free(ret);
-        return (NULL);
+        goto err;
     }
 
     if ((ret->meth->init != NULL) && !ret->meth->init(ret)) {
-#ifndef OPENSSL_NO_ENGINE
-        if (ret->engine)
-            ENGINE_finish(ret->engine);
-#endif
-        CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, ret, &ret->ex_data);
-        OPENSSL_free(ret);
-        ret = NULL;
+        RSAerr(RSA_F_RSA_NEW_METHOD, ERR_R_INIT_FAIL);
+        goto err;
     }
-    return (ret);
+
+    return ret;
+
+ err:
+    RSA_free(ret);
+    return NULL;
 }
 
 void RSA_free(RSA *r)
@@ -213,125 +109,371 @@ void RSA_free(RSA *r)
     if (r == NULL)
         return;
 
-    i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_RSA);
-#ifdef REF_PRINT
-    REF_PRINT("RSA", r);
-#endif
+    CRYPTO_DOWN_REF(&r->references, &i, r->lock);
+    REF_PRINT_COUNT("RSA", r);
     if (i > 0)
         return;
-#ifdef REF_CHECK
-    if (i < 0) {
-        fprintf(stderr, "RSA_free, bad reference count\n");
-        abort();
-    }
-#endif
+    REF_ASSERT_ISNT(i < 0);
 
-    if (r->meth->finish)
+    if (r->meth != NULL && r->meth->finish != NULL)
         r->meth->finish(r);
 #ifndef OPENSSL_NO_ENGINE
-    if (r->engine)
-        ENGINE_finish(r->engine);
+    ENGINE_finish(r->engine);
 #endif
 
     CRYPTO_free_ex_data(CRYPTO_EX_INDEX_RSA, r, &r->ex_data);
 
-    if (r->n != NULL)
-        BN_clear_free(r->n);
-    if (r->e != NULL)
-        BN_clear_free(r->e);
-    if (r->d != NULL)
-        BN_clear_free(r->d);
-    if (r->p != NULL)
-        BN_clear_free(r->p);
-    if (r->q != NULL)
-        BN_clear_free(r->q);
-    if (r->dmp1 != NULL)
-        BN_clear_free(r->dmp1);
-    if (r->dmq1 != NULL)
-        BN_clear_free(r->dmq1);
-    if (r->iqmp != NULL)
-        BN_clear_free(r->iqmp);
-    if (r->blinding != NULL)
-        BN_BLINDING_free(r->blinding);
-    if (r->mt_blinding != NULL)
-        BN_BLINDING_free(r->mt_blinding);
-    if (r->bignum_data != NULL)
-        OPENSSL_free_locked(r->bignum_data);
+    CRYPTO_THREAD_lock_free(r->lock);
+
+    BN_clear_free(r->n);
+    BN_clear_free(r->e);
+    BN_clear_free(r->d);
+    BN_clear_free(r->p);
+    BN_clear_free(r->q);
+    BN_clear_free(r->dmp1);
+    BN_clear_free(r->dmq1);
+    BN_clear_free(r->iqmp);
+    RSA_PSS_PARAMS_free(r->pss);
+    sk_RSA_PRIME_INFO_pop_free(r->prime_infos, rsa_multip_info_free);
+    BN_BLINDING_free(r->blinding);
+    BN_BLINDING_free(r->mt_blinding);
+    OPENSSL_free(r->bignum_data);
     OPENSSL_free(r);
 }
 
 int RSA_up_ref(RSA *r)
 {
-    int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_RSA);
-#ifdef REF_PRINT
-    REF_PRINT("RSA", r);
-#endif
-#ifdef REF_CHECK
-    if (i < 2) {
-        fprintf(stderr, "RSA_up_ref, bad reference count\n");
-        abort();
+    int i;
+
+    if (CRYPTO_UP_REF(&r->references, &i, r->lock) <= 0)
+        return 0;
+
+    REF_PRINT_COUNT("RSA", r);
+    REF_ASSERT_ISNT(i < 2);
+    return i > 1 ? 1 : 0;
+}
+
+int RSA_set_ex_data(RSA *r, int idx, void *arg)
+{
+    return CRYPTO_set_ex_data(&r->ex_data, idx, arg);
+}
+
+void *RSA_get_ex_data(const RSA *r, int idx)
+{
+    return CRYPTO_get_ex_data(&r->ex_data, idx);
+}
+
+int RSA_security_bits(const RSA *rsa)
+{
+    int bits = BN_num_bits(rsa->n);
+
+    if (rsa->version == RSA_ASN1_VERSION_MULTI) {
+        /* This ought to mean that we have private key at hand. */
+        int ex_primes = sk_RSA_PRIME_INFO_num(rsa->prime_infos);
+
+        if (ex_primes <= 0 || (ex_primes + 2) > rsa_multip_cap(bits))
+            return 0;
     }
-#endif
-    return ((i > 1) ? 1 : 0);
+    return BN_security_bits(bits, -1);
 }
 
-int RSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
-                         CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
+int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d)
 {
-    return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_RSA, argl, argp,
-                                   new_func, dup_func, free_func);
+    /* If the fields n and e in r are NULL, the corresponding input
+     * parameters MUST be non-NULL for n and e.  d may be
+     * left NULL (in case only the public key is used).
+     */
+    if ((r->n == NULL && n == NULL)
+        || (r->e == NULL && e == NULL))
+        return 0;
+
+    if (n != NULL) {
+        BN_free(r->n);
+        r->n = n;
+    }
+    if (e != NULL) {
+        BN_free(r->e);
+        r->e = e;
+    }
+    if (d != NULL) {
+        BN_free(r->d);
+        r->d = d;
+    }
+
+    return 1;
 }
 
-int RSA_set_ex_data(RSA *r, int idx, void *arg)
+int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q)
 {
-    return (CRYPTO_set_ex_data(&r->ex_data, idx, arg));
+    /* If the fields p and q in r are NULL, the corresponding input
+     * parameters MUST be non-NULL.
+     */
+    if ((r->p == NULL && p == NULL)
+        || (r->q == NULL && q == NULL))
+        return 0;
+
+    if (p != NULL) {
+        BN_free(r->p);
+        r->p = p;
+    }
+    if (q != NULL) {
+        BN_free(r->q);
+        r->q = q;
+    }
+
+    return 1;
 }
 
-void *RSA_get_ex_data(const RSA *r, int idx)
+int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp)
 {
-    return (CRYPTO_get_ex_data(&r->ex_data, idx));
-}
-
-int RSA_memory_lock(RSA *r)
-{
-    int i, j, k, off;
-    char *p;
-    BIGNUM *bn, **t[6], *b;
-    BN_ULONG *ul;
-
-    if (r->d == NULL)
-        return (1);
-    t[0] = &r->d;
-    t[1] = &r->p;
-    t[2] = &r->q;
-    t[3] = &r->dmp1;
-    t[4] = &r->dmq1;
-    t[5] = &r->iqmp;
-    k = sizeof(BIGNUM) * 6;
-    off = k / sizeof(BN_ULONG) + 1;
-    j = 1;
-    for (i = 0; i < 6; i++)
-        j += (*t[i])->top;
-    if ((p = OPENSSL_malloc_locked((off + j) * sizeof(BN_ULONG))) == NULL) {
-        RSAerr(RSA_F_RSA_MEMORY_LOCK, ERR_R_MALLOC_FAILURE);
-        return (0);
+    /* If the fields dmp1, dmq1 and iqmp in r are NULL, the corresponding input
+     * parameters MUST be non-NULL.
+     */
+    if ((r->dmp1 == NULL && dmp1 == NULL)
+        || (r->dmq1 == NULL && dmq1 == NULL)
+        || (r->iqmp == NULL && iqmp == NULL))
+        return 0;
+
+    if (dmp1 != NULL) {
+        BN_free(r->dmp1);
+        r->dmp1 = dmp1;
+    }
+    if (dmq1 != NULL) {
+        BN_free(r->dmq1);
+        r->dmq1 = dmq1;
     }
-    bn = (BIGNUM *)p;
-    ul = (BN_ULONG *)&(p[off]);
-    for (i = 0; i < 6; i++) {
-        b = *(t[i]);
-        *(t[i]) = &(bn[i]);
-        memcpy((char *)&(bn[i]), (char *)b, sizeof(BIGNUM));
-        bn[i].flags = BN_FLG_STATIC_DATA;
-        bn[i].d = ul;
-        memcpy((char *)ul, b->d, sizeof(BN_ULONG) * b->top);
-        ul += b->top;
-        BN_clear_free(b);
+    if (iqmp != NULL) {
+        BN_free(r->iqmp);
+        r->iqmp = iqmp;
     }
 
-    /* I should fix this so it can still be done */
-    r->flags &= ~(RSA_FLAG_CACHE_PRIVATE | RSA_FLAG_CACHE_PUBLIC);
+    return 1;
+}
+
+/*
+ * Is it better to export RSA_PRIME_INFO structure
+ * and related functions to let user pass a triplet?
+ */
+int RSA_set0_multi_prime_params(RSA *r, BIGNUM *primes[], BIGNUM *exps[],
+                                BIGNUM *coeffs[], int pnum)
+{
+    STACK_OF(RSA_PRIME_INFO) *prime_infos, *old = NULL;
+    RSA_PRIME_INFO *pinfo;
+    int i;
+
+    if (primes == NULL || exps == NULL || coeffs == NULL || pnum == 0)
+        return 0;
+
+    prime_infos = sk_RSA_PRIME_INFO_new_reserve(NULL, pnum);
+    if (prime_infos == NULL)
+        return 0;
 
-    r->bignum_data = p;
-    return (1);
+    if (r->prime_infos != NULL)
+        old = r->prime_infos;
+
+    for (i = 0; i < pnum; i++) {
+        pinfo = rsa_multip_info_new();
+        if (pinfo == NULL)
+            goto err;
+        if (primes[i] != NULL && exps[i] != NULL && coeffs[i] != NULL) {
+            BN_free(pinfo->r);
+            BN_free(pinfo->d);
+            BN_free(pinfo->t);
+            pinfo->r = primes[i];
+            pinfo->d = exps[i];
+            pinfo->t = coeffs[i];
+        } else {
+            rsa_multip_info_free(pinfo);
+            goto err;
+        }
+        (void)sk_RSA_PRIME_INFO_push(prime_infos, pinfo);
+    }
+
+    r->prime_infos = prime_infos;
+
+    if (!rsa_multip_calc_product(r)) {
+        r->prime_infos = old;
+        goto err;
+    }
+
+    if (old != NULL) {
+        /*
+         * This is hard to deal with, since the old infos could
+         * also be set by this function and r, d, t should not
+         * be freed in that case. So currently, stay consistent
+         * with other *set0* functions: just free it...
+         */
+        sk_RSA_PRIME_INFO_pop_free(old, rsa_multip_info_free);
+    }
+
+    r->version = RSA_ASN1_VERSION_MULTI;
+
+    return 1;
+ err:
+    /* r, d, t should not be freed */
+    sk_RSA_PRIME_INFO_pop_free(prime_infos, rsa_multip_info_free_ex);
+    return 0;
+}
+
+void RSA_get0_key(const RSA *r,
+                  const BIGNUM **n, const BIGNUM **e, const BIGNUM **d)
+{
+    if (n != NULL)
+        *n = r->n;
+    if (e != NULL)
+        *e = r->e;
+    if (d != NULL)
+        *d = r->d;
+}
+
+void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q)
+{
+    if (p != NULL)
+        *p = r->p;
+    if (q != NULL)
+        *q = r->q;
+}
+
+int RSA_get_multi_prime_extra_count(const RSA *r)
+{
+    int pnum;
+
+    pnum = sk_RSA_PRIME_INFO_num(r->prime_infos);
+    if (pnum <= 0)
+        pnum = 0;
+    return pnum;
+}
+
+int RSA_get0_multi_prime_factors(const RSA *r, const BIGNUM *primes[])
+{
+    int pnum, i;
+    RSA_PRIME_INFO *pinfo;
+
+    if ((pnum = RSA_get_multi_prime_extra_count(r)) == 0)
+        return 0;
+
+    /*
+     * return other primes
+     * it's caller's responsibility to allocate oth_primes[pnum]
+     */
+    for (i = 0; i < pnum; i++) {
+        pinfo = sk_RSA_PRIME_INFO_value(r->prime_infos, i);
+        primes[i] = pinfo->r;
+    }
+
+    return 1;
+}
+
+void RSA_get0_crt_params(const RSA *r,
+                         const BIGNUM **dmp1, const BIGNUM **dmq1,
+                         const BIGNUM **iqmp)
+{
+    if (dmp1 != NULL)
+        *dmp1 = r->dmp1;
+    if (dmq1 != NULL)
+        *dmq1 = r->dmq1;
+    if (iqmp != NULL)
+        *iqmp = r->iqmp;
+}
+
+int RSA_get0_multi_prime_crt_params(const RSA *r, const BIGNUM *exps[],
+                                    const BIGNUM *coeffs[])
+{
+    int pnum;
+
+    if ((pnum = RSA_get_multi_prime_extra_count(r)) == 0)
+        return 0;
+
+    /* return other primes */
+    if (exps != NULL || coeffs != NULL) {
+        RSA_PRIME_INFO *pinfo;
+        int i;
+
+        /* it's the user's job to guarantee the buffer length */
+        for (i = 0; i < pnum; i++) {
+            pinfo = sk_RSA_PRIME_INFO_value(r->prime_infos, i);
+            if (exps != NULL)
+                exps[i] = pinfo->d;
+            if (coeffs != NULL)
+                coeffs[i] = pinfo->t;
+        }
+    }
+
+    return 1;
+}
+
+const BIGNUM *RSA_get0_n(const RSA *r)
+{
+    return r->n;
+}
+
+const BIGNUM *RSA_get0_e(const RSA *r)
+{
+    return r->e;
+}
+
+const BIGNUM *RSA_get0_d(const RSA *r)
+{
+    return r->d;
+}
+
+const BIGNUM *RSA_get0_p(const RSA *r)
+{
+    return r->p;
+}
+
+const BIGNUM *RSA_get0_q(const RSA *r)
+{
+    return r->q;
+}
+
+const BIGNUM *RSA_get0_dmp1(const RSA *r)
+{
+    return r->dmp1;
+}
+
+const BIGNUM *RSA_get0_dmq1(const RSA *r)
+{
+    return r->dmq1;
+}
+
+const BIGNUM *RSA_get0_iqmp(const RSA *r)
+{
+    return r->iqmp;
+}
+
+void RSA_clear_flags(RSA *r, int flags)
+{
+    r->flags &= ~flags;
+}
+
+int RSA_test_flags(const RSA *r, int flags)
+{
+    return r->flags & flags;
+}
+
+void RSA_set_flags(RSA *r, int flags)
+{
+    r->flags |= flags;
+}
+
+int RSA_get_version(RSA *r)
+{
+    /* { two-prime(0), multi(1) } */
+    return r->version;
+}
+
+ENGINE *RSA_get0_engine(const RSA *r)
+{
+    return r->engine;
+}
+
+int RSA_pkey_ctx_ctrl(EVP_PKEY_CTX *ctx, int optype, int cmd, int p1, void *p2)
+{
+    /* If key type not RSA or RSA-PSS return error */
+    if (ctx != NULL && ctx->pmeth != NULL
+        && ctx->pmeth->pkey_id != EVP_PKEY_RSA
+        && ctx->pmeth->pkey_id != EVP_PKEY_RSA_PSS)
+        return -1;
+     return EVP_PKEY_CTX_ctrl(ctx, -1, optype, cmd, p1, p2);
 }