Digital
DigitalSignatureMetadata contains all metadata like appearance config, algorithm and other configuration needed for signing data
Constructors
Properties
BiometricSignatureData that will be written to the digital signature. May be null.
The estimated size is part of the size that will be reserved in the PDF document before digitally signing it. This size corresponds only to the /Contents field of the signature field, that is, the signature container. Core will actually reserve a bigger space to make room for implementation details (the /ByteRange field, the fact that a signature is hex-encoded in a PDF, etc.). A big estimated size will possibly make the signed document bigger than necessary, but a too small one will cause the signing process to fail. The value will be clamped to the nearest even value between 0 and 256 KB (262144 bytes). If not set, the default is 32 KB (32768 bytes).
Returns the algorithm to hash the document before the signature is created. Defaults to SHA-256.
SignatureAppearance that will be used to determine how the signature looks once signing is done.
timestampData is an optional field, it “upgrades” the signature to PAdES B-T level to include a cryptographic timestamp token to prove that the signed document existed at a given point in time.