/*
-Blind-ID library for user identification using RSA blind signatures
-Copyright (C) 2010 Rudolf Polzer
-
-This library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Lesser General Public
-License as published by the Free Software Foundation; either
-version 2.1 of the License, or (at your option) any later version.
-
-This library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-Lesser General Public License for more details.
-
-You should have received a copy of the GNU Lesser General Public
-License along with this library; if not, write to the Free Software
-Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-*/
+ * FILE: d0_bignum-openssl.c
+ * AUTHOR: Rudolf Polzer - divVerent@xonotic.org
+ *
+ * Copyright (c) 2010, Rudolf Polzer
+ * 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. Neither the name of the copyright holder nor the names of contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``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 CONTRIBUTOR(S) 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.
+ *
+ * $Format:commit %H$
+ * $Id$
+ */
+
+/* NOTE: this file links against openssl (http://www.openssl.org), which is
+ * under the OpenSSL License. You may have to abide to its terms too if you use
+ * this file.
+ * To alternatively link to GMP, provide the option --without-openssl to
+ * ./configure.
+ */
#include "d0_bignum.h"
#include <string.h>
#include <openssl/bn.h>
+// for stupid OpenSSL versions in Mac OS X
+#ifndef BN_is_negative
+#define BN_is_negative(a) ((a)->neg != 0)
+#define BN_set_negative(a,n) ((a)->neg = ((n) && !BN_is_zero(a)))
+#endif
+
struct d0_bignum_s
{
BIGNUM z;
#include <time.h>
#include <stdio.h>
-WARN_UNUSED_RESULT BOOL d0_bignum_INITIALIZE(void)
+D0_WARN_UNUSED_RESULT D0_BOOL d0_bignum_INITIALIZE(void)
{
ctx = BN_CTX_new();
d0_bignum_init(&temp);
ctx = NULL;
}
-BOOL d0_iobuf_write_bignum(d0_iobuf_t *buf, const d0_bignum_t *bignum)
+D0_BOOL d0_iobuf_write_bignum(d0_iobuf_t *buf, const d0_bignum_t *bignum)
{
static unsigned char numbuf[65536];
size_t count = 0;
if(n > 0)
BN_lshift(&r->z, &a->z, n);
else if(n < 0)
- BN_rshift(&r->z, &a->z, n);
+ BN_rshift(&r->z, &a->z, -n);
else if(r != a)
BN_copy(&r->z, &a->z);
return r;
return r;
}
+d0_bignum_t *d0_bignum_mod_sub(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b, const d0_bignum_t *m)
+{
+ if(!r) r = d0_bignum_new(); if(!r) return NULL;
+ BN_mod_sub(&r->z, &a->z, &b->z, &m->z, ctx);
+ return r;
+}
+
d0_bignum_t *d0_bignum_mod_mul(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *b, const d0_bignum_t *m)
{
if(!r) r = d0_bignum_new(); if(!r) return NULL;
return r;
}
-BOOL d0_bignum_mod_inv(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *m)
+D0_BOOL d0_bignum_mod_inv(d0_bignum_t *r, const d0_bignum_t *a, const d0_bignum_t *m)
{
// here, r MUST be set, as otherwise we cannot return error state!
return !!BN_mod_inverse(&r->z, &a->z, &m->z, ctx);
}
-int d0_bignum_isprime(d0_bignum_t *r, int param)
+int d0_bignum_isprime(const d0_bignum_t *r, int param)
{
- return BN_is_prime(&r->z, param, NULL, ctx, NULL);
+ if(param <= 0)
+ return BN_is_prime_fasttest(&r->z, 1, NULL, ctx, NULL, 1);
+ else
+ return BN_is_prime(&r->z, param, NULL, ctx, NULL);
}
d0_bignum_t *d0_bignum_gcd(d0_bignum_t *r, d0_bignum_t *s, d0_bignum_t *t, const d0_bignum_t *a, const d0_bignum_t *b)
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