tests/prng_sha1prng: add test application

tests/prng_sha1prng/Makefile

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+include ../Makefile.tests_common
+
+USEMODULE += random
+USEMODULE += prng_sha1prng
+
+include $(RIOTBASE)/Makefile.include

tests/prng_sha1prng/main.c

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+/*
+ * Copyright (C) 2020 HAW Hamburg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ *
+ * @file
+ * @brief       Test cases for the SHA1PRNG pseudo random number generator
+ *
+ * @author      Peter Kietzmann <peter.kietzmann@haw-hamburg.de>
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "kernel_defines.h"
+#include "random.h"
+
+/**
+ * @brief expected sequence for seed=1. This sequence was generated running the
+ *        following java program (openjdk 11.0.7) as a reference.
+ *
+ *~~~~
+ * import java.security.SecureRandom;
+ *
+ * public class SHA1PRNGTEST {
+ *   public static void main(String args[]) throws Exception {
+ *     SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
+ *     random.setSeed(1);
+ *     int number = 0;
+ *     for (int i = 0; i < 20; i++) {
+ *         number = random.nextInt();
+ *         System.out.print(Integer.toUnsignedString(number) + " ");
+ *     }
+ *     System.out.println("");
+ *   }
+ * }
+ *~~~~
+ */
+static const uint32_t seq_seed1[] =
+   {2529905901, 3336014406, 1714755920, 3709666991, 1432426612,  554064022,
+    1614405352,  861636861, 3689098857, 3893737371, 3138964692,  506954022,
+    3469584855, 4144207589, 2031557795, 3248917850, 2384338299, 3341545824,
+    2454801916, 3985646079};
+
+static void test_prng_sha1prng_java_u32(void)
+{
+    uint32_t seed[2] = {1, 0};
+
+    uint32_t test32[ARRAY_SIZE(seq_seed1)];
+
+    /* seed the generator with 8 bytes similar to the java reference
+     * implementation
+     */
+    random_init_by_array(seed, sizeof(seed));
+
+    /* request random samples */
+    for (unsigned i = 0; i < ARRAY_SIZE(seq_seed1); i++) {
+        test32[i] = random_uint32();
+    }
+
+    /* compare generator output and reference */
+    if (!(memcmp(test32, seq_seed1, sizeof(seq_seed1)))) {
+        printf("%s:SUCCESS\n", __func__);
+    }
+    else {
+        printf("%s:FAILURE\n", __func__);
+    }
+}
+
+int main(void)
+{
+
+    test_prng_sha1prng_java_u32();
+
+    return 0;
+}

tests/prng_sha1prng/tests/01-run.py

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+#!/usr/bin/env python3
+
+# Copyright (C) 2020 HAW Hamburg
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+import sys
+from testrunner import run
+
+
+def testfunc(child):
+    child.expect("test_prng_sha1prng_java_u32:SUCCESS\r\n")
+
+
+if __name__ == "__main__":
+    sys.exit(run(testfunc))