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-rw-r--r--src/test/test-random-util.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/src/test/test-random-util.c b/src/test/test-random-util.c
new file mode 100644
index 0000000..94c431f
--- /dev/null
+++ b/src/test/test-random-util.c
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include "hexdecoct.h"
+#include "random-util.h"
+#include "log.h"
+#include "tests.h"
+
+static void test_genuine_random_bytes(RandomFlags flags) {
+ uint8_t buf[16] = {};
+ unsigned i;
+
+ log_info("/* %s */", __func__);
+
+ for (i = 1; i < sizeof buf; i++) {
+ assert_se(genuine_random_bytes(buf, i, flags) == 0);
+ if (i + 1 < sizeof buf)
+ assert_se(buf[i] == 0);
+
+ hexdump(stdout, buf, i);
+ }
+}
+
+static void test_pseudo_random_bytes(void) {
+ uint8_t buf[16] = {};
+ unsigned i;
+
+ log_info("/* %s */", __func__);
+
+ for (i = 1; i < sizeof buf; i++) {
+ pseudo_random_bytes(buf, i);
+ if (i + 1 < sizeof buf)
+ assert_se(buf[i] == 0);
+
+ hexdump(stdout, buf, i);
+ }
+}
+
+static void test_rdrand(void) {
+ int r, i;
+
+ for (i = 0; i < 10; i++) {
+ unsigned long x = 0;
+
+ r = rdrand(&x);
+ if (r < 0) {
+ log_error_errno(r, "RDRAND failed: %m");
+ return;
+ }
+
+ printf("%lx\n", x);
+ }
+}
+
+int main(int argc, char **argv) {
+ test_setup_logging(LOG_DEBUG);
+
+ test_genuine_random_bytes(RANDOM_EXTEND_WITH_PSEUDO);
+ test_genuine_random_bytes(0);
+ test_genuine_random_bytes(RANDOM_BLOCK);
+ test_genuine_random_bytes(RANDOM_ALLOW_RDRAND);
+
+ test_pseudo_random_bytes();
+
+ test_rdrand();
+
+ return 0;
+}