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-rw-r--r--src/libdnssec/random.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/src/libdnssec/random.c b/src/libdnssec/random.c
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+++ b/src/libdnssec/random.c
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+/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <assert.h>
+#include <gnutls/gnutls.h>
+#include <gnutls/crypto.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "libdnssec/error.h"
+#include "libdnssec/random.h"
+#include "libdnssec/shared/shared.h"
+
+/* -- public API ----------------------------------------------------------- */
+
+_public_
+int dnssec_random_buffer(uint8_t *data, size_t size)
+{
+ if (!data) {
+ return DNSSEC_EINVAL;
+ }
+
+ int result = gnutls_rnd(GNUTLS_RND_RANDOM, data, size);
+ if (result != 0) {
+ assert_unreachable();
+ return DNSSEC_ERROR;
+ }
+
+ return DNSSEC_EOK;
+}
+
+_public_
+int dnssec_random_binary(dnssec_binary_t *binary)
+{
+ if (!binary) {
+ return DNSSEC_EINVAL;
+ }
+
+ return dnssec_random_buffer(binary->data, binary->size);
+}