Performs dynamic validation of signed code.


OSStatus SecCodeCheckValidity(SecCodeRef code, SecCSFlags flags, SecRequirementRef requirement);



The code object to be validated.


Optional flags; see SecCSFlags for possible values. Pass kSecCSDefaultFlags for standard behavior.


A code requirement specifying additional conditions the code must satisfy to be considered valid. Specify NULL if you don’t want to impose any additional requirements. Use the SecRequirementCreateWithString or SecRequirementCreateWithStringAndErrors function to create a code requirement object. See Code Signing Guide for a discussion of code requirements.

Return Value


This function obtains and verifies the signature on the code specified by the code object. It checks the validity of only those sealed components required to establish identity. For guest code, first the function checks the code object’s dynamic validity status as reported by its host, then it ensures that the code object’s host is in turn valid. For all code, it validates the code against a code requirement if one is specified. The call succeeds if all these conditions are satisfactory.

This function is secure against attempts to modify the file system source of the code object.

See Also

Code Signature Validity


Performs dynamic validation of signed code and returns detailed error information in the case of failure.


Validates a static code object.


Performs static validation of static signed code and returns detailed error information in the case of failure.

Static Code Validation Flags

Use these supplemental flags to test the validity of a static code signature.