The PdfSignature type exposes the following members.
(Optional) Information provided by the signer to enable a recipient to contact the signer to verify the signature.
Example: A phone number.
Gets or sets the length of the PdfSignature's Contents entry (in bytes).
(Optional) The time of signing. Depending on the signature handler, this may be a normal unverified computer time or a time generated in a verifiable way from a secure time server.
This value should be used only when the time of signing is not available in the signature.
Example: A time stamp can be embedded in a PKCS#7 binary data object (see 22.214.171.124, “PKCS#7 Signatures as used in ISO 32000”).
(Optional) A name that describes the encoding of the signature value and key information in the signature dictionary. A PDF processor may use any handler that supports this format to validate the signature.
(Optional) The CPU host name or physical location of the signing.
(Optional) The name of the person or authority signing the document.
This value should be used only when it is not possible to extract the name from the signature.
Example: From the certificate of the signer.
(Optional) The reason for the signing, such as ( I agree … ).