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author | John Crispin <john@openwrt.org> | 2014-01-12 12:07:46 +0000 |
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committer | John Crispin <john@openwrt.org> | 2014-01-12 12:07:46 +0000 |
commit | 2b4a04089ffa854324a8bc16cfe208d5fc058c62 (patch) | |
tree | 0dee6dc96274a0ba664648159ed89f6134ea0a4d /tools/firmware-utils/src/mkhilinkfw.c | |
parent | 3a64ddd0a18efe3c8fbf65579dca58672bf04fb1 (diff) | |
download | mtk-20170518-2b4a04089ffa854324a8bc16cfe208d5fc058c62.zip mtk-20170518-2b4a04089ffa854324a8bc16cfe208d5fc058c62.tar.gz mtk-20170518-2b4a04089ffa854324a8bc16cfe208d5fc058c62.tar.bz2 |
firmware-utils: add HLK-RM04 tool
Signed-off-by: John Crispin <blogic@openwrt.org>
SVN-Revision: 39238
Diffstat (limited to 'tools/firmware-utils/src/mkhilinkfw.c')
-rw-r--r-- | tools/firmware-utils/src/mkhilinkfw.c | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/tools/firmware-utils/src/mkhilinkfw.c b/tools/firmware-utils/src/mkhilinkfw.c new file mode 100644 index 0000000..fe6a200 --- /dev/null +++ b/tools/firmware-utils/src/mkhilinkfw.c @@ -0,0 +1,320 @@ +/* + * Copyright (C) 2013 Jeff Kent <jeff@jkent.net> + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * This tool encrypts and decrypts uImage formatted firmware for Hilink + * HLK-RM04 wireless modules. It will also truncate a dump of mtd6 and make + * it an image suitable for flashing via the stock firmware upgrade page. + * + * Build instructions: + * gcc -lcrypto hlkcrypt.c -o hlkcrypt + */ + +#include <errno.h> +#include <fcntl.h> +#include <getopt.h> +#include <openssl/des.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/mman.h> +#include <unistd.h> + +#define DES_KEY "H@L9K*(3" + +#ifndef min +#define min(a,b) \ + ({ __typeof__ (a) _a = (a); \ + __typeof__ (b) _b = (b); \ + _a < _b ? _a : _b; }) +#endif + +#define IH_MAGIC 0x27051956 +#define IH_NMLEN 32 +typedef struct image_header { + uint32_t ih_magic; /* Image Header Magic Number */ + uint32_t ih_hcrc; /* Image Header CRC Checksum */ + uint32_t ih_time; /* Image Creation Timestamp */ + uint32_t ih_size; /* Image Data Size */ + uint32_t ih_load; /* Data Load Address */ + uint32_t ih_ep; /* Entry Point Address */ + uint32_t ih_dcrc; /* Image Data CRC Checksum */ + uint8_t ih_os; /* Operating System */ + uint8_t ih_arch; /* CPU architecture */ + uint8_t ih_type; /* Image Type */ + uint8_t ih_comp; /* Compression Type */ + uint8_t ih_name[IH_NMLEN]; /* Image Name */ +} image_header_t; + +static int temp_fd = -1; +static DES_key_schedule schedule; + +static void show_usage(const char *arg0); +static void exit_cleanup(void); +static void copy_file(int src, int dst); +static void encrypt(void *p, off_t len); +static void decrypt(void *p, off_t len); + + +int main(int argc, char **argv) +{ + int encrypt_opt = 0; + int decrypt_opt = 0; + int input_opt = 0; + int output_opt = 0; + char *input_filename = NULL; + char *output_filename = NULL; + + int input_fd; + int output_fd; + off_t file_len; + char *p; + char buf[sizeof(image_header_t) + 3]; + image_header_t *header; + + while (1) { + static struct option long_options[] = { + {"encrypt", no_argument, 0, 'e'}, + {"decrypt", no_argument, 0, 'd'}, + {"input", required_argument, 0, 'i'}, + {"output", required_argument, 0, 'o'}, + {0, 0, 0, 0 } + }; + int option_index = 0; + int c = getopt_long(argc, argv, "dei:o:", + long_options, &option_index); + if (c == -1) + break; + + switch (c) { + case 'd': + decrypt_opt++; + if (decrypt_opt > 1) { + fprintf(stderr, "%s: decrypt may only be specified once\n", + argv[0]); + show_usage(argv[0]); + } + break; + + case 'e': + encrypt_opt++; + if (encrypt_opt > 1) { + fprintf(stderr, "%s: encrypt may only be specified once\n", + argv[0]); + show_usage(argv[0]); + } + break; + + case 'i': + input_opt++; + if (input_opt > 1) { + fprintf(stderr, "%s: only one input file may be specified\n", + argv[0]); + show_usage(argv[0]); + } + if (strcmp("-", optarg) != 0) { + input_filename = optarg; + } + break; + + case 'o': + output_opt++; + if (output_opt > 1) { + fprintf(stderr, "%s: only one output file may be specified\n", + argv[0]); + show_usage(argv[0]); + } + if (strcmp("-", optarg) != 0) { + output_filename = optarg; + } + break; + + case '?': + exit(-1); + + default: + abort(); + } + } + + if (decrypt_opt && encrypt_opt) { + fprintf(stderr, "%s: decrypt and encrypt may not be used together\n", + argv[0]); + show_usage(argv[0]); + } + + if (!decrypt_opt && !encrypt_opt) { + fprintf(stderr, "%s: neither decrypt or encrypt were specified\n", + argv[0]); + show_usage(argv[0]); + } + + temp_fd = fileno(tmpfile()); + if (temp_fd < 0) { + fprintf(stderr, "Can't create temporary file\n"); + exit(EXIT_FAILURE); + } + + atexit(exit_cleanup); + DES_set_key_unchecked((const_DES_cblock *)DES_KEY, &schedule); + + if (input_filename) { + input_fd = open(input_filename, O_RDONLY); + if (input_fd < 0) { + fprintf(stderr, "Can't open %s for reading: %s\n", input_filename, + strerror(errno)); + exit(EXIT_FAILURE); + } + copy_file(input_fd, temp_fd); + close(input_fd); + } + else { + copy_file(STDIN_FILENO, temp_fd); + } + + file_len = lseek(temp_fd, 0, SEEK_CUR); + if (file_len < 64) { + fprintf(stderr, "Not enough data\n"); + exit(EXIT_FAILURE); + } + + p = mmap(0, file_len, PROT_READ|PROT_WRITE, MAP_SHARED, temp_fd, 0); + if (p == MAP_FAILED) { + fprintf(stderr, "mmap failed: %s\n", strerror(errno)); + exit(EXIT_FAILURE); + } + + if (encrypt_opt) { + header = (image_header_t *)p; + off_t len = min(file_len, + ntohl(header->ih_size) + sizeof(image_header_t)); + if (ntohl(header->ih_magic) != IH_MAGIC) { + fprintf(stderr, "Header magic incorrect: " + "expected 0x%08X, got 0x%08X\n", + IH_MAGIC, ntohl(header->ih_magic)); + munmap(p, file_len); + exit(EXIT_FAILURE); + } + encrypt(p, len); + munmap(p, file_len); + if (len != file_len) { + if (ftruncate(temp_fd, len) < 0) { + fprintf(stderr, "ftruncate failed: %s\n", strerror(errno)); + exit(EXIT_FAILURE); + } + } + } + + if (decrypt_opt) { + off_t header_len = min(file_len, sizeof(image_header_t) + 3); + memcpy(buf, p, header_len); + decrypt(buf, header_len); + header = (image_header_t *)buf; + if (ntohl(header->ih_magic) != IH_MAGIC) { + fprintf(stderr, "Header magic incorrect: " + "expected 0x%08X, got 0x%08X\n", + IH_MAGIC, ntohl(header->ih_magic)); + exit(EXIT_FAILURE); + } + decrypt(p, file_len); + munmap(p, file_len); + } + + lseek(temp_fd, 0, SEEK_SET); + if (output_filename) { + output_fd = creat(output_filename, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH); + if (output_fd < 0) { + fprintf(stderr, "Can't open %s for writing: %s\n", + output_filename, strerror(errno)); + exit(EXIT_FAILURE); + } + copy_file(temp_fd, output_fd); + close(output_fd); + } + else { + copy_file(temp_fd, STDOUT_FILENO); + } + + exit(EXIT_SUCCESS); + return 0; +} + +static void show_usage(const char *arg0) +{ + fprintf(stderr, "usage: %s -d|-e [-i FILE] [-o FILE]\n\n", arg0); + fprintf(stderr, "%-15s %s\n", "-d, --decrypt", "decrypt data"); + fprintf(stderr, "%-15s %s\n", "-e, --encrypt", "encrypt data"); + fprintf(stderr, "%-15s %s\n", "-i, --input", "intput file (defaults to stdin)"); + fprintf(stderr, "%-15s %s\n", "-o, --output", "output file (defaults to stdout)"); + exit(-1); +} + +static void exit_cleanup(void) +{ + if (temp_fd >= 0) { + close(temp_fd); + } +} + +static void copy_file(int src, int dst) +{ + char buf[4096]; + ssize_t size; + + while ((size = read(src, buf, 4096)) > 0) { + write(dst, buf, size); + } +} + +static void encrypt(void *p, off_t len) +{ + DES_cblock *pblock; + int num_blocks; + + num_blocks = len / 8; + pblock = (DES_cblock *) p; + while (num_blocks--) { + DES_ecb_encrypt(pblock, pblock, &schedule, DES_ENCRYPT); + pblock++; + } + + num_blocks = (len - 3) / 8; + pblock = (DES_cblock *) (p + 3); + while (num_blocks--) { + DES_ecb_encrypt(pblock, pblock, &schedule, DES_ENCRYPT); + pblock++; + } +} + +static void decrypt(void *p, off_t len) +{ + DES_cblock *pblock; + int num_blocks; + + num_blocks = (len - 3) / 8; + pblock = (DES_cblock *) (p + 3); + while (num_blocks--) { + DES_ecb_encrypt(pblock, pblock, &schedule, DES_DECRYPT); + pblock++; + } + + num_blocks = len / 8; + pblock = (DES_cblock *) p; + while (num_blocks--) { + DES_ecb_encrypt(pblock, pblock, &schedule, DES_DECRYPT); + pblock++; + } +} |