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@ -2,22 +2,32 @@ import subprocess,lzma |
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import struct,os,re |
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from npk import NovaPackage,NpkPartID,NpkFileContainer |
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def replace_key(old,new,data,name=''): |
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old_chunks = [old[i:i+4] for i in range(0, len(old), 4)] |
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new_chunks = [new[i:i+4] for i in range(0, len(new), 4)] |
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def replace_chunks(old_chunks,new_chunks,data,name): |
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pattern_parts = [re.escape(chunk) + b'(.{0,6})' for chunk in old_chunks[:-1]] |
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pattern_parts.append(re.escape(old_chunks[-1])) |
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pattern_bytes = b''.join(pattern_parts) |
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pattern = re.compile(pattern_bytes, flags=re.DOTALL) |
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def replace_match(match): |
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# print(f'{name} found public key at {match.start()} {match.group().hex().upper()}') |
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replaced = b''.join([new_chunks[i] + match.group(i+1) for i in range(len(new_chunks) - 1)]) |
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replaced += new_chunks[-1] |
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# print(f'{name} replace public key {replaced.hex().upper()}') |
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print(f'{name} public key patched {old[:16].hex().upper()}...') |
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print(f'{name} public key patched {b''.join(old_chunks)[:16].hex().upper()}...') |
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return replaced |
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return re.sub(pattern, replace_match, data) |
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def replace_key(old,new,data,name=''): |
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old_chunks = [old[i:i+4] for i in range(0, len(old), 4)] |
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new_chunks = [new[i:i+4] for i in range(0, len(new), 4)] |
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data = replace_chunks(old_chunks, new_chunks, data,name) |
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if os.environ['ARCH'] == '-arm' and os.environ['LATEST_VERSION'] == '7.17.2': |
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old_codes = [bytes.fromhex('793583E2'),bytes.fromhex('FD3A83E2'),bytes.fromhex('193D83E2')] |
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new_codes = [bytes.fromhex('FF34A0E3'),bytes.fromhex('753C83E2'),bytes.fromhex('FC3083E2')] |
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data = replace_chunks(old_codes, new_codes, data,name) |
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old_bytes = old_chunks[4] + old_chunks[5] + old_chunks[2] + old_chunks[0] + old_chunks[1] + old_chunks[6] + old_chunks[7] |
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new_bytes = new_chunks[4] + new_chunks[5] + new_chunks[2] + new_chunks[0] + new_chunks[1] + new_chunks[6] + new_chunks[7] |
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if old_bytes in data: |
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print(f'{name} public key patched {old[:16].hex().upper()}...') |
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data = data.replace(old_bytes,new_bytes) |
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return data |
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def patch_bzimage(data:bytes,key_dict:dict): |
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PE_TEXT_SECTION_OFFSET = 414 |
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