Created
January 19, 2014 02:52
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| import re | |
| import binascii | |
| import sys | |
| def convert_hex(input_file, output_file): | |
| """ input: list containing raw lines of hex | |
| output: continuous binary data | |
| """ | |
| last_addr = None | |
| for line in input_file: | |
| addr = parse_prefix(line) | |
| if addr == 0: | |
| last_addr = addr | |
| output_file.write(line_h2b(line)) | |
| elif (addr - last_addr) == 0x10: | |
| last_addr = addr | |
| output_file.write(line_h2b(line)) | |
| elif (addr - last_addr) > 0x10: | |
| for null_addr in range((last_addr+0x10), (addr), 0x10): | |
| output_file.write("\x00" * 0x10) | |
| last_addr = addr | |
| output_file.write(line_h2b(line)) | |
| else: | |
| sys.exit("bad hex data? parsing line: %x" % addr) | |
| def parse_prefix(line): | |
| """ input: raw hex line, example: | |
| 0000: 0000 4400 0000 0000 0000 0000 0000 0000 ..D............. | |
| output: integer value of the line location | |
| """ | |
| addr = re.search("^(\w\w\w\w):", line) | |
| if addr: | |
| return int(addr.group(1), 16) | |
| else: | |
| print "[DEBUG] no prefix addr returned: %s" % line | |
| return None | |
| def line_h2b(line): | |
| """ input: raw hex line, example: | |
| 0000: 0000 4400 0000 0000 0000 0000 0000 0000 ..D............. | |
| output: binary equivelant of the line of hex | |
| """ | |
| stripped_line = re.search("^\w{4}:\s*(\w{4}\s\w{4}\s\w{4}\s\w{4}\s\w{4}\s\w{4}\s\w{4}\s\w{4})\s*", line) | |
| if stripped_line: | |
| hex_data = re.sub(r'\s', "", stripped_line.group(1)) | |
| return binascii.a2b_hex(hex_data) | |
| elif re.search("^\w{4}:\s*\*", line): | |
| return "\x00" * 0x10 | |
| else: | |
| return None | |
| def main(): | |
| if len(sys.argv) < 3: | |
| sys.exit("usage: %s <hex file> <binary output>" % sys.argv[0]) | |
| hex_f = open(sys.argv[1], 'rb') | |
| bin_f = open(sys.argv[2], 'wb') | |
| bindata = convert_hex(hex_f, bin_f) | |
| hex_f.close() | |
| bin_f.close() | |
| if __name__ == '__main__': | |
| main() | |
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