kSIGNoSignature - standard file signature not found

kSIGSignerNotValidErr - Signer has either expired or is pending and can not sign

kSIGConversionErr - unabled to convert an attribute to Mac format

kSIGNoDigestErr - no digest in the signature

kSIGContextPrepareErr - context either prepared with VerifyPrepare, SignPrepare or DigestPrepare already or has been corrupted

kSIGToolboxNotPresentErr - for client services (ie servers) to report back - not retruned by the TB

kSIGInternalsErr - an internal error occurred like a bad digest, context or signature

kSIGPasswordErr - password is incorrect

kSIGSignerErr - problem with the signer or signature itself

kSIGIndexErr - the index given is outside the range of allowable values

kSIGInvalidCredentialErr - verified OK but credential out of date, either pending or expired

kSIGVerifyFailedErr - verification failed

kSIGCertificateQueryDenied - can't query certificates with this context

kSIGOperationIncompatibleErr - context in use for different type of operation