-/* crypto/rsa/rsa_gen.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * 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.
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
- * 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 <time.h>
#include "internal/cryptlib.h"
#include <openssl/bn.h>
-#include <openssl/rsa.h>
+#include "rsa_locl.h"
static int rsa_builtin_keygen(RSA *rsa, int bits, BIGNUM *e_value,
BN_GENCB *cb);
BN_GENCB *cb)
{
BIGNUM *r0 = NULL, *r1 = NULL, *r2 = NULL, *r3 = NULL, *tmp;
- BIGNUM *local_r0, *local_d, *local_p;
- BIGNUM *pr0, *d, *p;
int bitsp, bitsq, ok = -1, n = 0;
BN_CTX *ctx = NULL;
- local_r0 = BN_new();
- local_d = BN_new();
- local_p = BN_new();
- if (!local_r0 || !local_d || !local_p)
- goto err;
-
ctx = BN_CTX_new();
if (ctx == NULL)
goto err;
if (!rsa->iqmp && ((rsa->iqmp = BN_secure_new()) == NULL))
goto err;
- BN_copy(rsa->e, e_value);
+ if (BN_copy(rsa->e, e_value) == NULL)
+ goto err;
/* generate p and q */
for (;;) {
goto err; /* q-1 */
if (!BN_mul(r0, r1, r2, ctx))
goto err; /* (p-1)(q-1) */
- if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {
- pr0 = local_r0;
+ {
+ BIGNUM *pr0 = BN_new();
+
+ if (pr0 == NULL)
+ goto err;
BN_with_flags(pr0, r0, BN_FLG_CONSTTIME);
- } else
- pr0 = r0;
- if (!BN_mod_inverse(rsa->d, rsa->e, pr0, ctx))
- goto err; /* d */
-
- /* set up d for correct BN_FLG_CONSTTIME flag */
- if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {
- d = local_d;
+ if (!BN_mod_inverse(rsa->d, rsa->e, pr0, ctx)) {
+ BN_free(pr0);
+ goto err; /* d */
+ }
+ /* We MUST free pr0 before any further use of r0 */
+ BN_free(pr0);
+ }
+
+ {
+ BIGNUM *d = BN_new();
+
+ if (d == NULL)
+ goto err;
BN_with_flags(d, rsa->d, BN_FLG_CONSTTIME);
- } else
- d = rsa->d;
- /* calculate d mod (p-1) */
- if (!BN_mod(rsa->dmp1, d, r1, ctx))
- goto err;
+ if ( /* calculate d mod (p-1) */
+ !BN_mod(rsa->dmp1, d, r1, ctx)
+ /* calculate d mod (q-1) */
+ || !BN_mod(rsa->dmq1, d, r2, ctx)) {
+ BN_free(d);
+ goto err;
+ }
+ /* We MUST free d before any further use of rsa->d */
+ BN_free(d);
+ }
- /* calculate d mod (q-1) */
- if (!BN_mod(rsa->dmq1, d, r2, ctx))
- goto err;
+ {
+ BIGNUM *p = BN_new();
- /* calculate inverse of q mod p */
- if (!(rsa->flags & RSA_FLAG_NO_CONSTTIME)) {
- p = local_p;
+ if (p == NULL)
+ goto err;
BN_with_flags(p, rsa->p, BN_FLG_CONSTTIME);
- } else
- p = rsa->p;
- if (!BN_mod_inverse(rsa->iqmp, rsa->q, p, ctx))
- goto err;
+
+ /* calculate inverse of q mod p */
+ if (!BN_mod_inverse(rsa->iqmp, rsa->q, p, ctx)) {
+ BN_free(p);
+ goto err;
+ }
+ /* We MUST free p before any further use of rsa->p */
+ BN_free(p);
+ }
ok = 1;
err:
- BN_free(local_r0);
- BN_free(local_d);
- BN_free(local_p);
if (ok == -1) {
RSAerr(RSA_F_RSA_BUILTIN_KEYGEN, ERR_LIB_BN);
ok = 0;
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