234 lines
6.9 KiB
Python
234 lines
6.9 KiB
Python
# -*- coding: utf-8 -*-
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# Thanks to Herbert Oppmann (herby) for all your work!
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from .ansi import RESET, RED
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from .chksum import ChkSum
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from .rgnbin import RgnBin
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from struct import unpack
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import configparser
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RGN_SIG = b"KpGr"
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DEFAULT_BUILDER = "SQA"
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# RGN structure might be: RGN > BIN or RGN > RGN > BIN
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# RGN = outside hull
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# BIN = firmware + hwid + checksum
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REGION_TYPES = {
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0x000a: "dskimg.bin",
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0x000c: "boot.bin",
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0x000e: "fw_all.bin",
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0x0010: "logo.bin",
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0x004e: "ZIP file",
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0x0055: "fw_all2.bin",
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0x00f5: "GCD firmware update file",
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0x00ff: "pk_text.zip",
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}
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class ParseException(Exception):
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pass
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class Rgn:
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def __init__(self, filename: str=None):
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self.filename = filename
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self.struct = []
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if filename is not None:
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self.load()
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def load(self):
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if self.filename is None:
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return False
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last_tlv6 = None
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last_tlv7 = None
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with open(self.filename, "rb") as f:
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sig = f.read(4)
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if sig != RGN_SIG:
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raise ParseException("Signature mismatch ({}, should be {})!".format(repr(sig), repr(RGN_SIG)))
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self.version = unpack("<H", f.read(2))[0]
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while True:
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cur_offset = f.tell()
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header = f.read(5)
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if len(header) == 0:
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#print("End of file reached.")
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break
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(length, type_id) = unpack("<Lc", header)
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#print("Found record type: {} with {} Bytes length.".format(type_id, length))
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rec = RgnRecord.factory(type_id, length, offset=cur_offset)
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payload = f.read(length)
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rec.set_payload(payload)
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self.add_rec(rec)
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f.close()
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def add_rec(self, new_rec):
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self.struct.append(new_rec)
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def print_struct(self):
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"""
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Prints the structure of the parsed RGN file
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"""
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print("RGN File Version: {}".format(self.version))
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print("{} records.".format(len(self.struct)))
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for i, rec in enumerate(self.struct):
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print("#{:03d}: {}".format(i, rec))
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def print_struct_full(self):
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"""
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Prints the structure of the parsed RGN file
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"""
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self.print_struct()
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def validate(self, print_stats: bool=False):
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"""
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Checks and verifies all checksums in the RGN.
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"""
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return True
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# RGN has no checksum, but embedded BIN has
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def dump_to_files(self, output_basename: str):
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pass
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@staticmethod
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def from_recipe(recipe_file: str):
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pass
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def save(self, filename):
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pass
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class RgnRecord():
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def __init__(self, type_id, expected_length, payload=None, offset=None):
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self.type_id = type_id
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self.length = expected_length
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self.is_binary = False
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self.payload = payload
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self.offset = offset
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self.is_parsed = False
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def set_payload(self, new_payload):
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self.payload = new_payload
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@staticmethod
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def factory(type_id, length: int = None, offset: int = None):
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if type_id == b"D":
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new_rec = RgnRecordD(type_id, length)
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elif type_id == b"A":
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new_rec = RgnRecordA(type_id, length)
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elif type_id == b"R":
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new_rec = RgnRecordR(type_id, length)
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new_rec.is_binary = True
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else:
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raise ParseException("Unknown record type: {} at offset 0x{:0x}".format(type_id, offset))
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new_rec.offset = offset
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return new_rec
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def __str__(self):
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rec_type = "Unknown"
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if self.type_id == b"D":
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rec_type = "Data Version"
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elif self.type_id == b"A":
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rec_type = "Application Version"
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elif self.type_id == b"R":
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rec_type = "Region"
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if self.length != 1:
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plural = "s"
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offset = ""
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if self.offset:
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offset = " at 0x{:x}".format(self.offset)
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lenstr = ""
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if self.length:
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lenstr = ", {:d} Byte{}".format(self.length, plural)
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return "RGN {} Record{}{}".format(rec_type, offset, lenstr)
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class RgnRecordD(RgnRecord):
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"""
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Data record (2 Bytes)
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- ushort - Version
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"""
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def __init__(self, type_id, expected_length, payload=None, offset=None):
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super().__init__(type_id, expected_length, payload, offset)
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self.version = None
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def parse(self):
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if self.is_parsed:
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# already parsed
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return
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self.version = unpack("<H", self.payload)[0]
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self.is_parsed = True
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def __str__(self):
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txt = super().__str__()
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if not self.is_parsed:
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self.parse()
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txt += "\n - Data Version: {}".format(self.version)
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return txt
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class RgnRecordA(RgnRecord):
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"""
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Application record
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- ushort - Application version
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- string - Builder
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- string - BuildDate
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- string - BuildTime
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"""
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def __init__(self, type_id, expected_length, payload=None, offset=None):
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super().__init__(type_id, expected_length, payload, offset)
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self.version = None
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self.builder = None
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self.build_date = None
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self.build_time = None
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def parse(self):
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if self.is_parsed:
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# already parsed
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return
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self.version = unpack("<H", self.payload[0:2])[0]
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splits = self.payload[2:].split(b"\0", 2)
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self.builder = splits[0].decode("utf-8")
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self.build_date = splits[1].decode("utf-8")
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self.build_time = splits[2].decode("utf-8")
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self.is_parsed = True
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def __str__(self):
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txt = super().__str__()
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if not self.is_parsed:
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self.parse()
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txt += "\n - Application Version: {}".format(self.version)
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txt += "\n - Builder: {}".format(self.builder)
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txt += "\n - Build time: {} {}".format(self.build_date, self.build_time)
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return txt
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class RgnRecordR(RgnRecord):
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"""
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Region record
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- ushort - Region ID
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- uint - Delay in ms
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- uint - Region size (is record length - 10)
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- byte[Region size] - Contents
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"""
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def __init__(self, type_id, expected_length, payload=None, offset=None):
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super().__init__(type_id, expected_length, payload, offset)
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self.region_id = None
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self.delay_ms = None
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self.size = None
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def parse(self):
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if self.is_parsed:
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# already parsed
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return
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(self.region_id, self.delay_ms, self.size) = unpack("<HLL", self.payload[0:10])
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self.is_parsed = True
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def __str__(self):
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txt = super().__str__()
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if not self.is_parsed:
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self.parse()
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rgn_type = REGION_TYPES.get(self.region_id, RED + "Unknown" + RESET)
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txt += "\n - Region ID: {:04x} ({})".format(self.region_id, rgn_type)
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txt += "\n - Flash delay: {} ms".format(self.delay_ms)
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txt += "\n - Binary size: {} Bytes".format(self.size)
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return txt
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