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Class DigestAlgorithm - Xamarin.Forms API Reference | Syncfusion

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    Class DigestAlgorithm

    Specifies the digestion algorithm.

    Inheritance
    System.Object
    DigestAlgorithm
    Namespace: Syncfusion.Pdf.Security
    Assembly: Syncfusion.Pdf.Portable.dll
    Syntax
    public sealed class DigestAlgorithm : Enum
    Examples
    //Creates a new PDF document.
    PdfDocument document = new PdfDocument();
    //Adds a new page.
    PdfPageBase page = document.Pages.Add();
    PdfGraphics graphics = page.Graphics;
    //Creates a certificate instance from PFX file with private key.
    PdfCertificate pdfCert = new PdfCertificate(@"PDF.pfx", "syncfusion");
    //Creates a digital signature.
    PdfSignature signature = new PdfSignature(document, page, pdfCert, "Signature");
    //Sets signature settings to customize digestion algorithm and cryptographic standrad specified
    PdfSignatureSettings properties = signature.Settings;
    properties.DigestAlgorithm = DigestAlgorithm.SHA256;
    //Sets an image for signature field.
    PdfBitmap signatureImage = new PdfBitmap(@"signature.jpg");
    //Sets signature information
    signature.Bounds = new RectangleF(new PointF(0, 0), signatureImage.PhysicalDimension);
    signature.ContactInfo = "[email protected]";
    signature.LocationInfo = "Honolulu, Hawaii";
    signature.Reason = "I am author of this document.";
    //Draws the signature image.
    graphics.DrawImage(signatureImage, 0, 0);
    //Saves and closes the document.
    document.Save("Output.pdf");
    document.Close(true);
    'Creates a new PDF document.
    Dim document As New PdfDocument()
    'Adds a new page.
    Dim page As PdfPageBase = document.Pages.Add()
    Dim graphics As PdfGraphics = page.Graphics
    'Creates a certificate instance from PFX file with private key.
    Dim pdfCert As New PdfCertificate("PDF.pfx", "syncfusion")
    'Creates a digital signature.
    Dim signature As New PdfSignature(document, page, pdfCert, "Signature")
    'Sets signature settings to customize digestion algorithm and cryptographic standrad specified
    Dim properties As PdfSignatureSettings = signature.Settings;
    properties.DigestAlgorithm = DigestAlgorithm.SHA256;
    'Sets an image for signature field.
    Dim signatureImage As New PdfBitmap("signature.jpg")
    'Sets signature info.
    signature.Bounds = New RectangleF(New PointF(0, 0), signatureImage.PhysicalDimension)
    signature.ContactInfo = "[email protected]"
    signature.LocationInfo = "Honolulu, Hawaii"
    signature.Reason = "I am author of this document."
    'Draws the signature image.
    graphics.DrawImage(signatureImage, 0, 0)
    'Saves and closes the document.
    document.Save("Output.pdf")
    document.Close(True)

    Fields

    RIPEMD160

    RIPEMD160 message digest algorithm

    Declaration
    public const DigestAlgorithm RIPEMD160
    Field Value
    Type
    DigestAlgorithm

    SHA1

    SHA1 message digest algorithm

    Declaration
    public const DigestAlgorithm SHA1
    Field Value
    Type
    DigestAlgorithm

    SHA256

    SHA256 message digest algorithm

    Declaration
    public const DigestAlgorithm SHA256
    Field Value
    Type
    DigestAlgorithm

    SHA384

    SHA384 message digest algorithm

    Declaration
    public const DigestAlgorithm SHA384
    Field Value
    Type
    DigestAlgorithm

    SHA512

    SHA512 message digest algorithm

    Declaration
    public const DigestAlgorithm SHA512
    Field Value
    Type
    DigestAlgorithm
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