--- /dev/null
+/*
+ * osafeloader
+ *
+ * Copyright (C) 2016 Rafał Miłecki <zajec5@gmail.com>
+ *
+ * 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 <byteswap.h>
+#include <endian.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "md5.h"
+
+#if !defined(__BYTE_ORDER)
+#error "Unknown byte order"
+#endif
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define cpu_to_be32(x) (x)
+#define be32_to_cpu(x) (x)
+#define cpu_to_be16(x) (x)
+#define be16_to_cpu(x) (x)
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+#define cpu_to_be32(x) bswap_32(x)
+#define be32_to_cpu(x) bswap_32(x)
+#define cpu_to_be16(x) bswap_16(x)
+#define be16_to_cpu(x) bswap_16(x)
+#else
+#error "Unsupported endianness"
+#endif
+
+struct safeloader_header {
+ uint32_t imagesize;
+ uint8_t md5[16];
+} __attribute__ ((packed));
+
+char *safeloader_path;
+char *partition_name;
+char *out_path;
+
+static inline size_t osafeloader_min(size_t x, size_t y) {
+ return x < y ? x : y;
+}
+
+static const uint8_t md5_salt[16] = {
+ 0x7a, 0x2b, 0x15, 0xed,
+ 0x9b, 0x98, 0x59, 0x6d,
+ 0xe5, 0x04, 0xab, 0x44,
+ 0xac, 0x2a, 0x9f, 0x4e,
+};
+
+/**************************************************
+ * Info
+ **************************************************/
+
+static int osafeloader_info(int argc, char **argv) {
+ FILE *safeloader;
+ struct safeloader_header hdr;
+ MD5_CTX ctx;
+ size_t bytes, imagesize;
+ uint8_t buf[1024];
+ uint8_t md5[16];
+ char name[32];
+ int base, size, i;
+ int err = 0;
+
+ if (argc < 3) {
+ fprintf(stderr, "No SafeLoader file passed\n");
+ err = -EINVAL;
+ goto out;
+ }
+ safeloader_path = argv[2];
+
+ safeloader = fopen(safeloader_path, "r");
+ if (!safeloader) {
+ fprintf(stderr, "Couldn't open %s\n", safeloader_path);
+ err = -EACCES;
+ goto out;
+ }
+
+ bytes = fread(&hdr, 1, sizeof(hdr), safeloader);
+ if (bytes != sizeof(hdr)) {
+ fprintf(stderr, "Couldn't read %s header\n", safeloader_path);
+ err = -EIO;
+ goto err_close;
+ }
+ imagesize = be32_to_cpu(hdr.imagesize);
+
+ MD5_Init(&ctx);
+ MD5_Update(&ctx, md5_salt, sizeof(md5_salt));
+ while ((bytes = fread(buf, 1, osafeloader_min(sizeof(buf), imagesize), safeloader)) > 0) {
+ MD5_Update(&ctx, buf, bytes);
+ imagesize -= bytes;
+ }
+ MD5_Final(md5, &ctx);
+
+ if (memcmp(md5, hdr.md5, 16)) {
+ fprintf(stderr, "Broken SafeLoader file with invalid MD5\n");
+ err = -EIO;
+ goto err_close;
+ }
+
+ printf("%10s: %d\n", "Image size", be32_to_cpu(hdr.imagesize));
+ printf("%10s: ", "MD5");
+ for (i = 0; i < 16; i++)
+ printf("%02x", md5[i]);
+ printf("\n");
+
+ /* Skip header & vendor info */
+ fseek(safeloader, 0x1014, SEEK_SET);
+
+ while (fscanf(safeloader, "fwup-ptn %s base 0x%x size 0x%x\t\r\n", name, &base, &size) == 3) {
+ printf("%10s: %s (0x%x - 0x%x)\n", "Partition", name, base, base + size);
+ }
+
+err_close:
+ fclose(safeloader);
+out:
+ return err;
+}
+
+/**************************************************
+ * Extract
+ **************************************************/
+
+static void osafeloader_extract_parse_options(int argc, char **argv) {
+ int c;
+
+ while ((c = getopt(argc, argv, "p:o:")) != -1) {
+ switch (c) {
+ case 'p':
+ partition_name = optarg;
+ break;
+ case 'o':
+ out_path = optarg;
+ break;
+ }
+ }
+}
+
+static int osafeloader_extract(int argc, char **argv) {
+ FILE *safeloader;
+ FILE *out;
+ struct safeloader_header hdr;
+ size_t bytes;
+ char name[32];
+ int base, size;
+ int err = 0;
+
+ if (argc < 3) {
+ fprintf(stderr, "No SafeLoader file passed\n");
+ err = -EINVAL;
+ goto out;
+ }
+ safeloader_path = argv[2];
+
+ optind = 3;
+ osafeloader_extract_parse_options(argc, argv);
+ if (!partition_name) {
+ fprintf(stderr, "No partition name specified\n");
+ err = -EINVAL;
+ goto out;
+ } else if (!out_path) {
+ fprintf(stderr, "No output file specified\n");
+ err = -EINVAL;
+ goto out;
+ }
+
+ safeloader = fopen(safeloader_path, "r");
+ if (!safeloader) {
+ fprintf(stderr, "Couldn't open %s\n", safeloader_path);
+ err = -EACCES;
+ goto out;
+ }
+
+ out = fopen(out_path, "w");
+ if (!out) {
+ fprintf(stderr, "Couldn't open %s\n", out_path);
+ err = -EACCES;
+ goto err_close_safeloader;
+ }
+
+ bytes = fread(&hdr, 1, sizeof(hdr), safeloader);
+ if (bytes != sizeof(hdr)) {
+ fprintf(stderr, "Couldn't read %s header\n", safeloader_path);
+ err = -EIO;
+ goto err_close_out;
+ }
+
+ /* Skip vendor info */
+ fseek(safeloader, 0x1000, SEEK_CUR);
+
+ err = -ENOENT;
+ while (fscanf(safeloader, "fwup-ptn %s base 0x%x size 0x%x\t\r\n", name, &base, &size) == 3) {
+ uint8_t buf[1024];
+
+ if (strcmp(name, partition_name))
+ continue;
+
+ err = 0;
+
+ fseek(safeloader, sizeof(hdr) + 0x1000 + base, SEEK_SET);
+
+ while ((bytes = fread(buf, 1, osafeloader_min(sizeof(buf), size), safeloader)) > 0) {
+ if (fwrite(buf, 1, bytes, out) != bytes) {
+ fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, out_path);
+ err = -EIO;
+ break;
+ }
+ size -= bytes;
+ }
+
+ if (size) {
+ fprintf(stderr, "Couldn't extract whole partition %s from %s (%d B left)\n", partition_name, safeloader_path, size);
+ err = -EIO;
+ }
+
+ break;
+ }
+
+err_close_out:
+ fclose(out);
+err_close_safeloader:
+ fclose(safeloader);
+out:
+ return err;
+}
+
+/**************************************************
+ * Start
+ **************************************************/
+
+static void usage() {
+ printf("Usage:\n");
+ printf("\n");
+ printf("Info about SafeLoader:\n");
+ printf("\tosafeloader info <file>\n");
+ printf("\n");
+ printf("Extract from SafeLoader:\n");
+ printf("\tosafeloader extract <file> [options]\n");
+ printf("\t-p name\t\t\t\tname of partition to extract\n");
+ printf("\t-o file\t\t\t\toutput file\n");
+}
+
+int main(int argc, char **argv) {
+ if (argc > 1) {
+ if (!strcmp(argv[1], "info"))
+ return osafeloader_info(argc, argv);
+ else if (!strcmp(argv[1], "extract"))
+ return osafeloader_extract(argc, argv);
+ }
+
+ usage();
+ return 0;
+}
projects / openwrt / staging / yousong.git / blobdiff