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-rw-r--r--tests/libdnssec/test_random.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/tests/libdnssec/test_random.c b/tests/libdnssec/test_random.c
new file mode 100644
index 0000000..7c86aa6
--- /dev/null
+++ b/tests/libdnssec/test_random.c
@@ -0,0 +1,82 @@
+/* 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 <stdint.h>
+#include <string.h>
+#include <tap/basic.h>
+
+#include "crypto.h"
+#include "error.h"
+#include "random.h"
+
+int check_buffer(void)
+{
+ const size_t buffer_size = 128;
+ uint8_t buffer_prev[buffer_size];
+ memset(buffer_prev, 0, buffer_size);
+ uint8_t buffer[buffer_size];
+ memset(buffer, 0, buffer_size);
+
+ for (int i = 0; i < 10; i++) {
+ int result = dnssec_random_buffer(buffer, buffer_size);
+ if (result != DNSSEC_EOK) {
+ return 1;
+ }
+
+ if (memcmp(buffer, buffer_prev, buffer_size) == 0) {
+ return 1;
+ }
+
+ memmove(buffer_prev, buffer, buffer_size);
+ }
+
+ return 0;
+}
+
+int check_random_type(void)
+{
+ uint16_t numbers[1000] = { 0 };
+ int conflicts = 0;
+
+ for (int i = 0; i < 1000; i++) {
+ numbers[i] = dnssec_random_uint16_t();
+ // check all previous
+ for (int j = 0; j < i; j++) {
+ if (numbers[i] == numbers[j]) {
+ conflicts += 1;
+ }
+ }
+ }
+
+ // allow 5 % of conflicts
+ return conflicts <= 50 ? 0 : 1;
+}
+
+int main(void)
+{
+ plan_lazy();
+
+ dnssec_crypto_init();
+
+ // quite stupid, just check if it does something
+
+ ok(check_buffer() == 0, "dnssec_random_buffer()");
+ ok(check_random_type() == 0, "dnssec_random_uint16_t()");
+
+ dnssec_crypto_cleanup();
+
+ return 0;
+}