X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fbn%2Fbn_mont.c;h=6d37279a5ea0e7b08f22a660fec1f263709ac942;hp=f19910dc4649a99e041100302937618c30ced04b;hb=120a9e1a825bd0407639bedb1e8e15823cf7a545;hpb=b196e7d936fb377d9c5b305748ac25ff0e53ef6d

diff --git a/crypto/bn/bn_mont.c b/crypto/bn/bn_mont.c
index f19910dc46..6d37279a5e 100644
--- a/crypto/bn/bn_mont.c
+++ b/crypto/bn/bn_mont.c
@@ -1,112 +1,10 @@
-/* crypto/bn/bn_mont.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.
- *
- * 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.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
- *
- * 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 above 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 acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED 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 OpenSSL PROJECT OR
- * ITS 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.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
  *
+ * 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
  */
 
 /*
@@ -116,7 +14,7 @@
  * sections 3.8 and 4.2 in http://security.ece.orst.edu/koc/papers/r01rsasw.pdf
  */
 
-#include "cryptlib.h"
+#include "internal/cryptlib.h"
 #include "bn_lcl.h"
 
 #define MONT_WORD               /* use the faster word-based algorithm */
@@ -196,7 +94,9 @@ static int BN_from_montgomery_word(BIGNUM *ret, BIGNUM *r, BN_MONT_CTX *mont)
     rp = r->d;
 
     /* clear the top words of T */
-    memset(&(rp[r->top]), 0, (max - r->top) * sizeof(BN_ULONG));
+    i = max - r->top;
+    if (i)
+        memset(&rp[r->top], 0, sizeof(*rp) * i);
 
     r->top = max;
     n0 = mont->n0[0];
@@ -314,7 +214,7 @@ BN_MONT_CTX *BN_MONT_CTX_new(void)
 {
     BN_MONT_CTX *ret;
 
-    if ((ret = OPENSSL_malloc(sizeof(BN_MONT_CTX))) == NULL)
+    if ((ret = OPENSSL_malloc(sizeof(*ret))) == NULL)
         return (NULL);
 
     BN_MONT_CTX_init(ret);
@@ -325,9 +225,9 @@ BN_MONT_CTX *BN_MONT_CTX_new(void)
 void BN_MONT_CTX_init(BN_MONT_CTX *ctx)
 {
     ctx->ri = 0;
-    BN_init(&(ctx->RR));
-    BN_init(&(ctx->N));
-    BN_init(&(ctx->Ni));
+    bn_init(&(ctx->RR));
+    bn_init(&(ctx->N));
+    bn_init(&(ctx->Ni));
     ctx->n0[0] = ctx->n0[1] = 0;
     ctx->flags = 0;
 }
@@ -337,9 +237,9 @@ void BN_MONT_CTX_free(BN_MONT_CTX *mont)
     if (mont == NULL)
         return;
 
-    BN_free(&(mont->RR));
-    BN_free(&(mont->N));
-    BN_free(&(mont->Ni));
+    BN_clear_free(&(mont->RR));
+    BN_clear_free(&(mont->N));
+    BN_clear_free(&(mont->Ni));
     if (mont->flags & BN_FLG_MALLOCED)
         OPENSSL_free(mont);
 }
@@ -349,6 +249,9 @@ int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)
     int ret = 0;
     BIGNUM *Ri, *R;
 
+    if (BN_is_zero(mod))
+        return 0;
+
     BN_CTX_start(ctx);
     if ((Ri = BN_CTX_get(ctx)) == NULL)
         goto err;
@@ -362,7 +265,7 @@ int BN_MONT_CTX_set(BN_MONT_CTX *mont, const BIGNUM *mod, BN_CTX *ctx)
         BIGNUM tmod;
         BN_ULONG buf[2];
 
-        BN_init(&tmod);
+        bn_init(&tmod);
         tmod.d = buf;
         tmod.dmax = 2;
         tmod.neg = 0;
@@ -492,14 +395,14 @@ BN_MONT_CTX *BN_MONT_CTX_copy(BN_MONT_CTX *to, BN_MONT_CTX *from)
     return (to);
 }
 
-BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock,
+BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, CRYPTO_RWLOCK *lock,
                                     const BIGNUM *mod, BN_CTX *ctx)
 {
     BN_MONT_CTX *ret;
 
-    CRYPTO_r_lock(lock);
+    CRYPTO_THREAD_read_lock(lock);
     ret = *pmont;
-    CRYPTO_r_unlock(lock);
+    CRYPTO_THREAD_unlock(lock);
     if (ret)
         return ret;
 
@@ -512,7 +415,7 @@ BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock,
      * (the losers throw away the work they've done).
      */
     ret = BN_MONT_CTX_new();
-    if (!ret)
+    if (ret == NULL)
         return NULL;
     if (!BN_MONT_CTX_set(ret, mod, ctx)) {
         BN_MONT_CTX_free(ret);
@@ -520,12 +423,12 @@ BN_MONT_CTX *BN_MONT_CTX_set_locked(BN_MONT_CTX **pmont, int lock,
     }
 
     /* The locked compare-and-set, after the local work is done. */
-    CRYPTO_w_lock(lock);
+    CRYPTO_THREAD_write_lock(lock);
     if (*pmont) {
         BN_MONT_CTX_free(ret);
         ret = *pmont;
     } else
         *pmont = ret;
-    CRYPTO_w_unlock(lock);
+    CRYPTO_THREAD_unlock(lock);
     return ret;
 }