added unbound to external deps

1 files changed, 166 insertions, 0 deletions

diff --git a/external/unbound/util/random.c b/external/unbound/util/random.c
new file mode 100644
index 000000000..71f0ba53e
--- /dev/null
+++ b/external/unbound/util/random.c
@@ -0,0 +1,166 @@
+/*
+ * util/random.c - thread safe random generator, which is reasonably secure.
+ * 
+ * Copyright (c) 2007, NLnet Labs. All rights reserved.
+ * 
+ * This software is open source.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 
+ * 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.
+ * 
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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 COPYRIGHT
+ * HOLDER 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.
+ */
+
+/**
+ * \file
+ * Thread safe random functions. Similar to arc4random() with an explicit
+ * initialisation routine.
+ *
+ * The code in this file is based on arc4random from
+ * openssh-4.0p1/openbsd-compat/bsd-arc4random.c
+ * That code is also BSD licensed. Here is their statement:
+ *
+ * Copyright (c) 1996, David Mazieres <dm@uun.org>
+ * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+#include "config.h"
+#include "util/random.h"
+#include "util/log.h"
+#include <time.h>
+
+#ifdef HAVE_NSS
+/* nspr4 */
+#include "prerror.h"
+/* nss3 */
+#include "secport.h"
+#include "pk11pub.h"
+#endif
+
+/** 
+ * Max random value.  Similar to RAND_MAX, but more portable
+ * (mingw uses only 15 bits random).
+ */
+#define MAX_VALUE 0x7fffffff
+
+#ifndef HAVE_NSS
+void
+ub_systemseed(unsigned int ATTR_UNUSED(seed))
+{
+	/* arc4random_uniform does not need seeds, it gets kernel entropy */
+}
+
+struct ub_randstate* 
+ub_initstate(unsigned int ATTR_UNUSED(seed),
+	struct ub_randstate* ATTR_UNUSED(from))
+{
+	struct ub_randstate* s = (struct ub_randstate*)malloc(1);
+	if(!s) {
+		log_err("malloc failure in random init");
+		return NULL;
+	}
+	return s;
+}
+
+long int 
+ub_random(struct ub_randstate* ATTR_UNUSED(s))
+{
+	/* This relies on MAX_VALUE being 0x7fffffff. */
+	return (long)arc4random() & MAX_VALUE;
+}
+
+long int
+ub_random_max(struct ub_randstate* state, long int x)
+{
+	(void)state;
+	/* on OpenBSD, this does not need _seed(), or _stir() calls */
+	return (long)arc4random_uniform((uint32_t)x);
+}
+
+#else
+
+/* not much to remember for NSS since we use its pk11_random, placeholder */
+struct ub_randstate {
+	int ready;
+};
+
+void ub_systemseed(unsigned int ATTR_UNUSED(seed))
+{
+}
+
+struct ub_randstate* ub_initstate(unsigned int ATTR_UNUSED(seed), 
+	struct ub_randstate* ATTR_UNUSED(from))
+{
+	struct ub_randstate* s = (struct ub_randstate*)calloc(1, sizeof(*s));
+	if(!s) {
+		log_err("malloc failure in random init");
+		return NULL;
+	}
+	return s;
+}
+
+long int ub_random(struct ub_randstate* ATTR_UNUSED(state))
+{
+	long int x;
+	/* random 31 bit value. */
+	SECStatus s = PK11_GenerateRandom((unsigned char*)&x, (int)sizeof(x));
+	if(s != SECSuccess) {
+		log_err("PK11_GenerateRandom error: %s",
+			PORT_ErrorToString(PORT_GetError()));
+	}
+	return x & MAX_VALUE;
+}
+
+long int
+ub_random_max(struct ub_randstate* state, long int x)
+{
+	/* make sure we fetch in a range that is divisible by x. ignore
+	 * values from d .. MAX_VALUE, instead draw a new number */
+	long int d = MAX_VALUE - (MAX_VALUE % x); /* d is divisible by x */
+	long int v = ub_random(state);
+	while(d <= v)
+		v = ub_random(state);
+	return (v % x);
+}
+#endif /* HAVE_NSS */
+
+void 
+ub_randfree(struct ub_randstate* s)
+{
+	if(s)
+		free(s);
+	/* user app must do RAND_cleanup(); */
+}