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Update patch.py

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Signed-off-by: elseif <elseif@live.cn>
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elseif 2025-02-18 20:31:07 +08:00 committed by GitHub
parent 6518dda504
commit 10a56eb673
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1 changed files with 16 additions and 6 deletions
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patch.py
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@ -2,22 +2,32 @@ import subprocess,lzma
import struct,os,re import struct,os,re
from npk import NovaPackage,NpkPartID,NpkFileContainer from npk import NovaPackage,NpkPartID,NpkFileContainer
def replace_key(old,new,data,name=''): def replace_chunks(old_chunks,new_chunks,data,name):
old_chunks = [old[i:i+4] for i in range(0, len(old), 4)]
new_chunks = [new[i:i+4] for i in range(0, len(new), 4)]
pattern_parts = [re.escape(chunk) + b'(.{0,6})' for chunk in old_chunks[:-1]] pattern_parts = [re.escape(chunk) + b'(.{0,6})' for chunk in old_chunks[:-1]]
pattern_parts.append(re.escape(old_chunks[-1])) pattern_parts.append(re.escape(old_chunks[-1]))
pattern_bytes = b''.join(pattern_parts) pattern_bytes = b''.join(pattern_parts)
pattern = re.compile(pattern_bytes, flags=re.DOTALL) pattern = re.compile(pattern_bytes, flags=re.DOTALL)
def replace_match(match): def replace_match(match):
# print(f'{name} found public key at {match.start()} {match.group().hex().upper()}')
replaced = b''.join([new_chunks[i] + match.group(i+1) for i in range(len(new_chunks) - 1)]) replaced = b''.join([new_chunks[i] + match.group(i+1) for i in range(len(new_chunks) - 1)])
replaced += new_chunks[-1] replaced += new_chunks[-1]
# print(f'{name} replace public key {replaced.hex().upper()}') print(f'{name} public key patched {b''.join(old_chunks)[:16].hex().upper()}...')
print(f'{name} public key patched {old[:16].hex().upper()}...')
return replaced return replaced
return re.sub(pattern, replace_match, data) return re.sub(pattern, replace_match, data)
def replace_key(old,new,data,name=''):
old_chunks = [old[i:i+4] for i in range(0, len(old), 4)]
new_chunks = [new[i:i+4] for i in range(0, len(new), 4)]
data = replace_chunks(old_chunks, new_chunks, data,name)
if os.environ['ARCH'] == '-arm' and os.environ['LATEST_VERSION'] == '7.17.2':
old_codes = [bytes.fromhex('793583E2'),bytes.fromhex('FD3A83E2'),bytes.fromhex('193D83E2')]
new_codes = [bytes.fromhex('FF34A0E3'),bytes.fromhex('753C83E2'),bytes.fromhex('FC3083E2')]
data = replace_chunks(old_codes, new_codes, data,name)
old_bytes = old_chunks[4] + old_chunks[5] + old_chunks[2] + old_chunks[0] + old_chunks[1] + old_chunks[6] + old_chunks[7]
new_bytes = new_chunks[4] + new_chunks[5] + new_chunks[2] + new_chunks[0] + new_chunks[1] + new_chunks[6] + new_chunks[7]
if old_bytes in data:
print(f'{name} public key patched {old[:16].hex().upper()}...')
data = data.replace(old_bytes,new_bytes)
return data
def patch_bzimage(data:bytes,key_dict:dict): def patch_bzimage(data:bytes,key_dict:dict):
PE_TEXT_SECTION_OFFSET = 414 PE_TEXT_SECTION_OFFSET = 414