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62fa781350
The verify_signature() function had a logic bug where the break statement was executed even when quote parsing failed, preventing fallback to the key ID extraction. The break was positioned to execute whenever "Good signature from" appeared, regardless of whether the signer name was successfully extracted from quotes. This left signer_info as "Unknown signer" when quote parsing failed. Fix: Move break inside the successful parsing block (if len(parts) >= 2) so it only breaks after successfully extracting the signer name. If quote parsing fails, the loop continues and can fall back to extracting the key ID from the "using" line. Testing: Created comprehensive test suite verifying correct extraction of signer information and proper handling of edge cases.