From 6585e5ad764ee2414d9b01f30784b6549bc8f58e Mon Sep 17 00:00:00 2001
From: Othmar Gsenger <otti@anytun.org>
Date: Mon, 30 Jul 2007 19:37:53 +0000
Subject: added keyexchange

---
 keyexchange/isakmpd-20041012/gmp_util.c | 105 ++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 keyexchange/isakmpd-20041012/gmp_util.c

(limited to 'keyexchange/isakmpd-20041012/gmp_util.c')

diff --git a/keyexchange/isakmpd-20041012/gmp_util.c b/keyexchange/isakmpd-20041012/gmp_util.c
new file mode 100644
index 0000000..2a338d2
--- /dev/null
+++ b/keyexchange/isakmpd-20041012/gmp_util.c
@@ -0,0 +1,105 @@
+/* $OpenBSD: gmp_util.c,v 1.11 2004/04/15 18:39:25 deraadt Exp $	 */
+/* $EOM: gmp_util.c,v 1.7 2000/09/18 00:01:47 ho Exp $	 */
+
+/*
+ * Copyright (c) 1998 Niels Provos.  All rights reserved.
+ * Copyright (c) 1999, 2000 Niklas Hallqvist.  All rights reserved.
+ * Copyright (c) 2000 Håkan Olsson.  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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 code was written under funding by Ericsson Radio Systems.
+ */
+
+#include <sys/param.h>
+
+#include "sysdep.h"
+
+#include "gmp_util.h"
+#include "math_mp.h"
+
+/* Various utility functions for gmp, used in more than one module */
+
+u_int32_t
+mpz_sizeinoctets(math_mp_t a)
+{
+#if MP_FLAVOUR == MP_FLAVOUR_GMP
+	return (7 + mpz_sizeinbase(a, 2)) >> 3;
+#elif MP_FLAVOUR == MP_FLAVOUR_OPENSSL
+	return BN_num_bytes(a);
+#endif
+}
+
+void
+mpz_getraw(u_int8_t *raw, math_mp_t v, u_int32_t len)
+{
+	math_mp_t       a;
+
+#if MP_FLAVOUR == MP_FLAVOUR_GMP
+	math_mp_t       tmp;
+
+	/* XXX  mpz_get_str (raw, BASE, v); ? */
+	mpz_init_set(a, v);
+	mpz_init(tmp);
+#elif MP_FLAVOUR == MP_FLAVOUR_OPENSSL
+	/* XXX bn2bin?  */
+	a = BN_dup(v);
+#endif
+
+	while (len-- > 0)
+#if MP_FLAVOUR == MP_FLAVOUR_GMP
+		raw[len] = mpz_fdiv_qr_ui(a, tmp, a, 256);
+#elif MP_FLAVOUR == MP_FLAVOUR_OPENSSL
+	raw[len] = BN_div_word(a, 256);
+#endif
+
+#if MP_FLAVOUR == MP_FLAVOUR_GMP
+	mpz_clear(a);
+	mpz_clear(tmp);
+#elif MP_FLAVOUR == MP_FLAVOUR_OPENSSL
+	BN_clear_free(a);
+#endif
+}
+
+void
+mpz_setraw(math_mp_t d, u_int8_t *s, u_int32_t l)
+{
+	u_int32_t       i;
+
+#if MP_FLAVOUR == MP_FLAVOUR_GMP
+	/* XXX mpz_set_str (d, s, 0);  */
+	mpz_set_si(d, 0);
+#elif MP_FLAVOUR == MP_FLAVOUR_OPENSSL
+	/* XXX bin2bn?  */
+	BN_set_word(d, 0);
+#endif
+	for (i = 0; i < l; i++) {
+#if MP_FLAVOUR == MP_FLAVOUR_GMP
+		mpz_mul_ui(d, d, 256);
+		mpz_add_ui(d, d, s[i]);
+#elif MP_FLAVOUR == MP_FLAVOUR_OPENSSL
+		BN_mul_word(d, 256);
+		BN_add_word(d, s[i]);
+#endif
+	}
+}
-- 
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