1 files changed, 0 insertions, 213 deletions
diff --git a/tools/firmware-utils/src/sign_dlink_ru.c b/tools/firmware-utils/src/sign_dlink_ru.c
deleted file mode 100644
index 50f2e67bf4..0000000000
--- a/tools/firmware-utils/src/sign_dlink_ru.c
+++ /dev/null
@@ -1,213 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * This program is designed to sign firmware images so they are accepted
- * by D-Link DIR-882 R1 WebUIs.
- *
- * Copyright (C) 2020 Andrew Pikler
- */
-
-#include <stdlib.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-#include "md5.h"
-
-#define BUF_SIZE 4096
-#define MD5_HASH_LEN 16
-
-
-typedef struct _md5_digest_t {
-	uint8_t digest[MD5_HASH_LEN];
-} md5_digest_t;
-
-typedef struct _salt_t {
-	char* salt_ascii;
-	uint8_t* salt_bin;
-	size_t salt_bin_len;
-} salt_t;
-
-void read_file_bytes(FILE* f, MD5_CTX* md5_ctx) {
-	uint8_t buf[BUF_SIZE];
-	size_t bytes_read;
-	rewind(f);
-	
-	while (0 != (bytes_read = fread(buf, sizeof(uint8_t), BUF_SIZE, f))) {
-		MD5_Update(md5_ctx, buf, bytes_read);
-	}
-
-	if (!feof(f)) {
-		printf("Error: expected to be at EOF\n");
-		exit(-1);
-	}
-}
-
-void add_magic_bytes(FILE* f) {
-	char magic_bytes[] = { 0x00, 0xc0, 0xff, 0xee };
-	size_t magic_bytes_len = 4;
-	fwrite(magic_bytes, magic_bytes_len, 1, f);
-}
-
-/**
- * Add the signature produced by this salt to the file
- * The signature consists by creating an MD5 digest wht the salt bytes plus
- * all of the bytes in the firmware file, then adding the magic bytes to the
- * file
- */
-void add_signature(FILE* f, salt_t* salt) {
-	md5_digest_t digest;
-	MD5_CTX md5_context;
-
-	MD5_Init(&md5_context);
-	MD5_Update(&md5_context, salt->salt_bin, salt->salt_bin_len);
-	read_file_bytes(f, &md5_context);
-	MD5_Final(digest.digest, &md5_context);
-
-	fwrite(&digest.digest, sizeof(uint8_t), MD5_HASH_LEN, f);
-	add_magic_bytes(f);
-}
-
-void add_version_suffix(FILE* f) {
-	char* version_suffix = "c0ffeef0rge";
-	fseek(f, 0, SEEK_END);
-	fwrite(version_suffix, sizeof(char), strlen(version_suffix), f);
-}
-
-int asciihex_to_int(char c) {
-	if(c >= '0' && c <= 'F')
-		return c - '0';
-
-	if(c >= 'a' && c <= 'f')
-		return 10 + c - 'a';
-	return -1;
-}
-
-/**
- * Verify this is a valid hex string to convert
- */
-void verify_valid_hex_str(char* s) {
-	int i;
-	int s_len = strlen(s);
-	if (s_len == 0) {
-		printf("invalid empty salt: %s\n", s);
-		exit(-1);
-	}
-
-	if (s_len % 2 != 0) {
-		printf("invalid odd len salt: %s\n", s);
-		exit(-1);
-	}
-
-	for (i = 0; i < s_len; ++i) {
-		if (asciihex_to_int(s[i]) < 0) {
-			printf("invalid salt (invalid hex char): %s\n", s);
-			exit(-1);
-		}
-	}
-}
-
-/**
- * Convert a hex ascii string to an allocated binary array. This array must be free'd
- */
-uint8_t* convert_hex_to_bin(char * s) {
-	int i;
-	int s_len = strlen(s);
-
-	uint8_t* ret = malloc(s_len / 2);
-	for (i = 0; i < s_len; i += 2) {
-		ret[i / 2] = (asciihex_to_int(s[i]) << 4) | asciihex_to_int(s[i + 1]);
-	}
-
-	return ret;
-}
-
-void init_salt(salt_t* salt, char * salt_ascii) {
-	salt->salt_ascii = salt_ascii;
-	salt->salt_bin = convert_hex_to_bin(salt_ascii);
-	salt->salt_bin_len = strlen(salt_ascii) / 2;
-}
-
-void free_salt(salt_t* salt) {
-	free(salt->salt_bin);
-}
-
-/**
- * Verify that the arguments are valid, or exit with failure
- */
-void verify_args(int argc, char** argv) {
-	int i;
-
-	if (argc < 3) {
-		printf("Usage: %s <firmware file> <signing hash1> <signing hash2> ... <signing hash n>\n", argv[0]);
-		exit(1);
-	}
-
-	for (i = 2; i < argc; i++) {
-		verify_valid_hex_str(argv[i]);
-	}
-}
-
-FILE* make_out_file(char* filename) {
-	uint8_t buf[BUF_SIZE];
-	int bytes_read;
-	char* suffix = ".new";
-	int new_filename_len = strlen(filename) + strlen(suffix) + 1;
-	char* new_filename = malloc(new_filename_len);
-	strcpy(new_filename, filename);
-	strcat(new_filename, suffix);
-
-	FILE* f = fopen(filename, "r+");
-	if (!f) {
-		printf("cannot open file %s\n", filename);
-		exit(2);
-	}
-
-	FILE* out = fopen(new_filename, "w+");
-	free(new_filename);
-	if (!out) {
-		printf("cannot open file %s\n", filename);
-		exit(2);
-	}
-
-	while (0 != (bytes_read = fread(buf, sizeof(uint8_t), BUF_SIZE, f))) {
-		fwrite(buf, sizeof(uint8_t), bytes_read, out);
-	}
-	fclose(f);
-	return out;
-}
-
-/**
- * Sign the firmware file after all of our checks have completed
- */
-void sign_firmware(char* filename, char** salts, int num_salts) {
-	int i;
-	salt_t salt;
-	FILE* f = make_out_file(filename);
-
-	// add a version suffix string - dlink versions do something similar before the first signature
-	add_version_suffix(f);
-
-	//for each of the salts we are supplied with
-	for (i = 0; i < num_salts; i++) {
-		char* salt_str = salts[i];
-		// convert this str to binary
-		init_salt(&salt, salt_str);
-
-		// add the signature to the firmware file produced from this salt
-		add_signature(f, &salt);
-		free_salt(&salt);
-		printf("Signed with salt: %s\n", salt_str);
-	}
-
-	fclose(f);
-}
-
-
-int main(int argc, char ** argv) {
-	verify_args(argc, argv);
-	sign_firmware(argv[1], argv+2, argc-2);
-	return 0;
-}