diff options
| -rw-r--r-- | tools/firmware-utils/Makefile | 1 | ||||
| -rw-r--r-- | tools/firmware-utils/src/buffalo-tftp.c | 179 |
2 files changed, 180 insertions, 0 deletions
diff --git a/tools/firmware-utils/Makefile b/tools/firmware-utils/Makefile index da69805..3293398 100644 --- a/tools/firmware-utils/Makefile +++ b/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 diff --git a/tools/firmware-utils/src/buffalo-tftp.c b/tools/firmware-utils/src/buffalo-tftp.c new file mode 100644 index 0000000..1a2551a --- /dev/null +++ b/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; +} |