tools/firmware-utils: add yet another buffalo tool

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27475 3c298f89-4303-0410-b956-a3cf2f4a3e73

tools/firmware-utils/Makefile

@@ -52,6 +52,7 @@ define Host/Compile
 	$(call cc,xorimage)
 	$(call cc,buffalo-enc buffalo-lib, -Wall)
 	$(call cc,buffalo-tag buffalo-lib, -Wall)
+	$(call cc,buffalo-tftp buffalo-lib, -Wall)
 	$(call cc,mkwrgimg md5, -Wall)
 endef
 

tools/firmware-utils/src/buffalo-tftp.c

@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <libgen.h>
+#include <getopt.h>     /* for getopt() */
+#include <stdarg.h>
+
+#include "buffalo-lib.h"
+
+#define ERR(fmt, args...) do { \
+	fflush(0); \
+	fprintf(stderr, "[%s] *** error: " fmt "\n", \
+			progname, ## args ); \
+} while (0)
+
+static char *progname;
+static char *ifname;
+static char *ofname;
+static int do_decrypt;
+
+void usage(int status)
+{
+	FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
+
+	fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
+	fprintf(stream,
+"\n"
+"Options:\n"
+"  -d              decrypt instead of encrypt\n"
+"  -i <file>       read input from the file <file>\n"
+"  -o <file>       write output to the file <file>\n"
+"  -h              show this screen\n"
+	);
+
+	exit(status);
+}
+
+static const unsigned char *crypt_key1 = (unsigned char *)
+	"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+static const unsigned char *crypt_key2 = (unsigned char *)
+	"XYZ0123hijklmnopqABCDEFGHrstuvabcdefgwxyzIJKLMSTUVW456789NOPQR";
+
+static void crypt_header(unsigned char *buf, ssize_t len,
+			 const unsigned char *key1, const unsigned char *key2)
+{
+	ssize_t i;
+
+	for (i = 0; i < len; i++) {
+		unsigned int j;
+
+		for (j = 0; key1[j]; j++)
+			if (buf[i] == key1[j]) {
+				buf[i] = key2[j];
+				break;
+			}
+	}
+}
+
+static int crypt_file(void)
+{
+	unsigned char *buf = NULL;
+	ssize_t src_len;
+	ssize_t crypt_len;
+	int err;
+	int ret = -1;
+
+	src_len = get_file_size(ifname);
+	if (src_len < 0) {
+		ERR("unable to get size of '%s'", ifname);
+		goto out;
+	}
+
+	buf = malloc(src_len);
+	if (buf == NULL) {
+		ERR("no memory for the buffer");
+		goto out;
+	}
+
+	err = read_file_to_buf(ifname, buf, src_len);
+	if (err) {
+		ERR("unable to read from file '%s'", ifname);
+		goto out;
+	}
+
+	crypt_len = (src_len > 512) ? 512 : src_len;
+	if (do_decrypt)
+		crypt_header(buf, 512, crypt_key2, crypt_key1);
+	else
+		crypt_header(buf, 512, crypt_key1, crypt_key2);
+
+	err = write_buf_to_file(ofname, buf, src_len);
+	if (err) {
+		ERR("unable to write to file '%s'", ofname);
+		goto out;
+	}
+
+	ret = 0;
+
+out:
+	free(buf);
+	return ret;
+}
+
+static int check_params(void)
+{
+	int ret = -1;
+
+	if (ifname == NULL) {
+		ERR("no input file specified");
+		goto out;
+	}
+
+	if (ofname == NULL) {
+		ERR("no output file specified");
+		goto out;
+	}
+
+	ret = 0;
+
+out:
+	return ret;
+}
+
+int main(int argc, char *argv[])
+{
+	int res = EXIT_FAILURE;
+	int err;
+
+	progname = basename(argv[0]);
+
+	while ( 1 ) {
+		int c;
+
+		c = getopt(argc, argv, "di:o:h");
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'd':
+			do_decrypt = 1;
+			break;
+		case 'i':
+			ifname = optarg;
+			break;
+		case 'o':
+			ofname = optarg;
+			break;
+		case 'h':
+			usage(EXIT_SUCCESS);
+			break;
+		default:
+			usage(EXIT_FAILURE);
+			break;
+		}
+	}
+
+	err = check_params();
+	if (err)
+		goto out;
+
+	err = crypt_file();
+	if (err)
+		goto out;
+
+	res = EXIT_SUCCESS;
+
+out:
+	return res;
+}