add gmssl command

tools/rand.c

@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2020 - 2021 The GmSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the GmSSL Project.
+ *    (http://gmssl.org/)"
+ *
+ * 4. The name "GmSSL Project" must not be used to endorse or promote
+ *    products derived from this software without prior written
+ *    permission. For written permission, please contact
+ *    guanzhi1980@gmail.com.
+ *
+ * 5. Products derived from this software may not be called "GmSSL"
+ *    nor may "GmSSL" appear in their names without prior written
+ *    permission of the GmSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the GmSSL Project
+ *    (http://gmssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 GmSSL PROJECT OR
+ * ITS 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>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <gmssl/rand.h>
+#include <gmssl/error.h>
+
+
+static const char *options = "[-hex] [-rdrand] -outlen num";
+
+int rand_main(int argc, char **argv)
+{
+	int ret = -1;
+	char *prog = argv[0];
+	int hex = 0;
+	int rdrand = 0;
+	int outlen = 0;
+	uint8_t buf[2048];
+	int i;
+
+	argc--;
+	argv++;
+
+	if (argc < 1) {
+		fprintf(stderr, "usage: %s %s\n", prog, options);
+		return 1;
+	}
+
+	while (argc > 0) {
+		if (!strcmp(*argv, "-help")) {
+			fprintf(stderr, "usage: %s %s\n", prog, options);
+			return 1;
+		} else if (!strcmp(*argv, "-hex")) {
+			hex = 1;
+		} else if (!strcmp(*argv, "-rdrand")) {
+			// rdrand = 1; // FIXME: CMakeList.txt should be updated to support this option
+		} else if (!strcmp(*argv, "-outlen")) {
+			if (--argc < 1) goto bad;
+			outlen = atoi(*(++argv));
+			if (outlen < 1 || outlen > INT_MAX) {
+				error_print();
+				return 1;
+			}
+		} else {
+			fprintf(stderr, "%s: illegal option '%s'\n", prog, *argv);
+			return 1;
+bad:
+			fprintf(stderr, "%s: invalid option argument\n", prog);
+			return 1;
+		}
+
+		argc--;
+		argv++;
+	}
+
+	if (!outlen) {
+		error_print();
+		return 1;
+	}
+
+	while (outlen) {
+		size_t len = outlen < sizeof(buf) ? outlen : sizeof(buf);
+
+		if (rdrand) {
+/*
+			if (rdrand_bytes(buf, len) != 1) {
+				error_print();
+				return 1;
+			}
+*/
+		} else {
+			if (rand_bytes(buf, len) != 1) {
+				error_print();
+				return -1;
+			}
+		}
+
+		if (hex) {
+			int i;
+			for (i = 0; i < len; i++) {
+				fprintf(stdout, "%02X", buf[i]);
+			}
+		} else {
+			fwrite(buf, 1, len, stdout);
+		}
+
+		outlen -= len;
+	}
+
+	if (hex) {
+		fprintf(stdout, "\n");
+	}
+
+	return 0;
+}