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-rw-r--r--srtp/crypto/test/rand_gen.c140
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diff --git a/srtp/crypto/test/rand_gen.c b/srtp/crypto/test/rand_gen.c
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+/*
+ * rand_gen.c
+ *
+ * a random source (random number generator)
+ *
+ * David A. McGrew
+ * Cisco Systems, Inc.
+ */
+/*
+ *
+ * Copyright(c) 2001-2006 Cisco Systems, Inc.
+ * All rights reserved.
+ *
+ * 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 Cisco Systems, Inc. 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 HOLDERS 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.
+ *
+ */
+
+
+#include <stdio.h> /* for printf() */
+#include <unistd.h> /* for getopt() */
+#include "crypto_kernel.h"
+
+/*
+ * MAX_PRINT_STRING_LEN is defined in datatypes.h, and is the length
+ * of the largest hexadecimal string that can be generated by the
+ * function octet_string_hex_string().
+ */
+
+#define BUF_LEN (MAX_PRINT_STRING_LEN/2)
+
+void
+usage(char *prog_name) {
+ printf("usage: %s -n <num_bytes> [-l][ -d debug_module ]*\n"
+ " -n <num> output <num> random bytes, where <num>"
+ " is between zero and %d\n"
+ " -l list the avaliable debug modules\n"
+ " -d <mod> turn on debugging module <mod>\n",
+ prog_name, BUF_LEN);
+ exit(255);
+}
+
+int
+main (int argc, char *argv[]) {
+ extern char *optarg;
+ int q;
+ int num_octets = 0;
+ unsigned do_list_mods = 0;
+ err_status_t status;
+
+ if (argc == 1)
+ usage(argv[0]);
+
+ /* initialize kernel - we need to do this before anything else */
+ status = crypto_kernel_init();
+ if (status) {
+ printf("error: crypto_kernel init failed\n");
+ exit(1);
+ }
+
+ /* process input arguments */
+ while (1) {
+ q = getopt(argc, argv, "ld:n:");
+ if (q == -1)
+ break;
+ switch (q) {
+ case 'd':
+ status = crypto_kernel_set_debug_module(optarg, 1);
+ if (status) {
+ printf("error: set debug module (%s) failed\n", optarg);
+ exit(1);
+ }
+ break;
+ case 'l':
+ do_list_mods = 1;
+ break;
+ case 'n':
+ num_octets = atoi(optarg);
+ if (num_octets < 0 || num_octets > BUF_LEN)
+ usage(argv[0]);
+ break;
+ default:
+ usage(argv[0]);
+ }
+ }
+
+ if (do_list_mods) {
+ status = crypto_kernel_list_debug_modules();
+ if (status) {
+ printf("error: list of debug modules failed\n");
+ exit(1);
+ }
+ }
+
+ if (num_octets > 0) {
+ uint8_t buffer[BUF_LEN];
+
+ status = crypto_get_random(buffer, num_octets);
+ if (status) {
+ printf("error: failure in random source\n");
+ } else {
+ printf("%s\n", octet_string_hex_string(buffer, num_octets));
+ }
+ }
+
+ status = crypto_kernel_shutdown();
+ if (status) {
+ printf("error: crypto_kernel shutdown failed\n");
+ exit(1);
+ }
+
+ return 0;
+}
+