Class PdfSignature

A class that represents a PDF signing certificate (.PFX or .p12) format which can be used to digitally sign a PDF. This protecting it from alteration.

Inheritance
System.Object
PdfSignature
Namespace: IronPdf.Signing
Assembly: IronPdf.dll
Syntax
public class PdfSignature : Object

Constructors

PdfSignature(Byte[], String, String)

Initializes a new instance of the PdfSignature class.

Declaration
public PdfSignature(byte[] CertificateRawData, string Password, string TimeStampUrl = null)
Parameters
Type Name Description
System.Byte[] CertificateRawData

The certificate as a binary data (byte array).
System.String Password

The certificate's password.
System.String TimeStampUrl

Url used for time-stamping the signature.

PdfSignature(X509Certificate2)

Initializes a new instance of the PdfSignature class. Not working in docker mode (Installation.UseIronPdfEngineDocker)

Declaration
public PdfSignature(X509Certificate2 exportableNativeCertificate)
Parameters
Type Name Description
System.Security.Cryptography.X509Certificates.X509Certificate2 exportableNativeCertificate

The exportable native certificate as a System.Security.Cryptography.X509Certificates.X509Certificate2.

PdfSignature(String, String, String)

Initializes a new instance of the PdfSignature class using a .pfx or .p12 digital signature file.

Declaration
public PdfSignature(string FilePathToCertificate, string Password, string TimeStampUrl = null)
Parameters
Type Name Description
System.String FilePathToCertificate

The file path to certificate.
System.String Password

The certificate's password.
System.String TimeStampUrl

Url used for time-stamping the signature.

Fields

ContactInformation

The contact phone number or email address for signing related inquiries (optional).

Declaration
public string ContactInformation
Field Value
Type Description
System.String

SignatureDate

The date and time of the digital signature. If left null, the signature will be timestamped at the millisecond that the PdfDocument is saved to Disk or Stream.

Declaration
public Nullable<DateTime> SignatureDate
Field Value
Type Description
System.Nullable<System.DateTime>

SignatureImage

A visual image for the sign, often a PNG of a human signature or company stamp (optional).

This appends a visual signature in addition to cryptographic signing.

LoadSignatureImageFromFile(String, Int32, Rectangle)LoadSignatureImageFromStream(Stream, Int32, Rectangle)

Declaration
public PdfSignatureImage SignatureImage
Field Value
Type Description
PdfSignatureImage

SigningContact

The contact person (optional).

Declaration
public string SigningContact
Field Value
Type Description
System.String

SigningLocation

The physical location the PDF was signed (optional).

Declaration
public string SigningLocation
Field Value
Type Description
System.String

SigningReason

The reason the PDF was signed (optional).

Declaration
public string SigningReason
Field Value
Type Description
System.String

TimestampHashAlgorithm

Algorithm requested to be used by the time-stamping server

Declaration
public TimestampHashAlgorithms TimestampHashAlgorithm
Field Value
Type Description
TimestampHashAlgorithms

TimeStampUrl

Url to be used when time-stamping the signature

Declaration
public string TimeStampUrl
Field Value
Type Description
System.String

Methods

FromBase64(String, String, String)

Create a new PDF signature from the specified base64 string

Declaration
public static PdfSignature FromBase64(string Base64, string Password = null, string TimeStampUrl = null)
Parameters
Type Name Description
System.String Base64

Base-64 string which represents a certificate
System.String Password

Certificate password
System.String TimeStampUrl

Optional Time-stamping URL
Returns
Type Description
PdfSignature

PDF signature

LoadSignatureImageFromFile(String, Int32, Rectangle)

Loads a signature image from an image file. This appends a visual signature in addition to cryptographic signing.

Declaration
public void LoadSignatureImageFromFile(string FilePath, int PageIndex, Rectangle Rectangle)
Parameters
Type Name Description
System.String FilePath

Image path
System.Int32 PageIndex

Page index to display image
IronSoftware.Drawing.Rectangle Rectangle

Rectangle to display image

LoadSignatureImageFromStream(Stream, Int32, Rectangle)

Loads a signature image from a stream. This appends visual signature in addition to cryptographic signing.

Declaration
public void LoadSignatureImageFromStream(Stream Stream, int PageIndex, Rectangle Rectangle)
Parameters
Type Name Description
System.IO.Stream Stream

The image file as a stream.
System.Int32 PageIndex

Page index to display image
IronSoftware.Drawing.Rectangle Rectangle

Rectangle to display image

Extension Methods