Signature

Signature class

An abstract class which represents signature object in the pdf document. Signatures are fields with values of signature objects, the last contain data which is used to verify the document validity.

public abstract class Signature

Constructors

Name Description
Signature() Inititalizes new instance of the Signature class.
Signature(Stream, string) Inititalizes new instance of the Signature class.
Signature(string, string) Inititalizes new instance of the Signature class.

Properties

Name Description
Authority { get; set; } The name of the person or authority signing the document.
ByteRange { get; } An array of pairs of integers (starting byte offset, length in bytes) that shall describe the exact byte range for the digest calculation.
ContactInfo { get; set; } Information provided by the signer to enable a recipient to contact the signer to verify the signature, e.g. a phone number.
CustomAppearance { get; set; } Gets/sets the custom appearance.
Date { get; set; } The time of signing.
Location { get; set; } The CPU host name or physical location of the signing.
OcspSettings { get; set; } Gets/sets ocsp settings.
Reason { get; set; } The reason for the signing, such as (I agree…).
ShowProperties { get; set; } Force to show/hide signature properties. In case ShowProperties is true signature field has predefined format of appearance (strings to represent): ——————————————- Digitally signed by {certificate subject} Date: {signature.Date} Reason: {signature.Reason} Location: {signature.Location} ——————————————- where {X} is placeholder for X value. Also signature can have image, in this case listed strings are placed over image. ShowProperties is true by default.
TimestampSettings { get; set; } Gets/sets timestamp settings.
UseLtv { get; set; } Gets/sets ltv validation flag.

Methods

Name Description
Verify() Verify the document regarding this signature and return true if document is valid or otherwise false.

See Also