The code snippet you've shared is not an actual code...

The code snippet you've shared is not an actual code implementation but rather looks like an error message or log statement generated by some application or system, likely related to SMB (Server Message Block) protocol communication.

Here’s what this message indicates:

• smb: Refers to the SMB protocol, which is used for shared access to files, printers, and other network resources in local networks.
• signature verification: SMB uses digital signatures to ensure the authenticity and integrity of its communication. Signature verification is the process of checking whether the digital signature included in a message is valid.
• returned error = -13: Indicates that the signature verification process failed. The -13 is likely an error code, and in many systems (e.g., Unix/Linux), -13 corresponds to the error EACCES, meaning "Permission denied."

In summary:

This message suggests that SMB attempted to verify the digital signature of a message, but the verification process failed, returning error code -13. This could happen due to mismatched signatures, misconfigured SMB settings, or permission-related issues in the environment.