Validation Error Code

The following table defines a list of known codes and their description, which can be returned from the Validator interface. Other error codes can be returned by validator implementations outside ndn-cxx codebase.

Error code	Short ID	Description
0	NO_ERROR	No error
1	INVALID_SIGNATURE	Invalid signature
2	NO_SIGNATURE	Missing signature
3	CANNOT_RETRIEVE_CERT	Cannot retrieve certificate
4	EXPIRED_CERT	Certificate expired
5	LOOP_DETECTED	Loop detected in certification chain
6	MALFORMED_CERT	Malformed certificate
7	EXCEEDED_DEPTH_LIMIT	Exceeded validation depth limit
8	INVALID_KEY_LOCATOR	Key locator violates validation policy
	…	…
255	IMPLEMENTATION_ERROR	Internal implementation error

Specialized validator implementations can use error codes >= 256 to indicate a specialized error.