fix: support signing unsigned Mach-O binaries without LC_CODE_SIGNATURE#44
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Add support for ad-hoc signing Mach-O binaries that don't have an existing LC_CODE_SIGNATURE load command (unsigned binaries). Changes: - Add write_u32/write_u64 helpers that respect binary endianness (ctx.le) instead of hardcoded .to_le_bytes() - Extract InsertCodeSigParams struct and insert_code_signature_command_into_buffer() as shared helper for inserting LC_CODE_SIGNATURE into header padding - Update generate_adhoc_signature() to parse binary context for endianness - Update adhoc_sign() to detect missing LC_CODE_SIGNATURE and insert it - Update adhoc_sign_file() to use shared helper for LC_CODE_SIGNATURE insertion - Add test_sign_unsigned_binary test case
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Add support for ad-hoc signing Mach-O binaries that don't have an existing
LC_CODE_SIGNATUREload command (unsigned binaries).Changes:
write_u32/write_u64helpers that respect binary endianness (ctx.le) instead of hardcoded.to_le_bytes()InsertCodeSigParamsstruct andinsert_code_signature_command_into_buffer()as shared helper for insertingLC_CODE_SIGNATUREinto header paddinggenerate_adhoc_signature()to parse binary context for endiannessadhoc_sign()to detect missingLC_CODE_SIGNATUREand insert itadhoc_sign_file()to use shared helper forLC_CODE_SIGNATUREinsertionThis is for PyO3/maturin#3114 (https://github.com/PyO3/maturin/actions/runs/23901410353/job/69698993401)