The encryption padding from the signature contents couldn't be extracted.
The public key from the signature contents couldn't be extracted.
The signing certificate from the signature contents couldn't be extracted.
The digest of the document couldn't be calculated.
The signature /ByteRange couldn't be parsed.
The signature /Contents couldn't be parsed.
An unspecific error.
The part of the document covered by the signature has not been modified.
The part of the document covered by the signature has been modified.
The digital signature contains a timestamp that is not valid or the timestamped data was tampered with.
The different signature validation states the document can be in.