Class PdfSignatureWriter

Namespace

SimpleSign.PAdES.Signing

Assembly

SimpleSign.PAdES.dll

Writes PDF digital signature structures using incremental updates (appending new objects, cross-reference table, and trailer to an existing PDF without modifying the original bytes). Delegates PDF parsing to SimpleSign.Pdf.PdfStructureParser and visual rendering to SimpleSign.PAdES.Signing.SignatureAppearanceRenderer.

public sealed class PdfSignatureWriter

Inheritance

object

PdfSignatureWriter

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Fields

DefaultContentsReservedBytes

Default number of bytes reserved for the CMS signature hex contents (64 KB).

public const int DefaultContentsReservedBytes = 65536

Field Value

int

Methods

FinalizeAsync(Stream, PdfSignaturePrepareResult, byte[], ILogger?, CancellationToken)

Writes the CMS signature bytes (as hex) into the /Contents placeholder of the prepared PDF.

public static Task FinalizeAsync(Stream outputStream, PdfSignaturePrepareResult prepareResult, byte[] cmsBytes, ILogger? logger = null, CancellationToken cancellationToken = default)

Parameters

outputStream Stream

prepareResult PdfSignaturePrepareResult

cmsBytes byte[]

logger ILogger

cancellationToken CancellationToken

Returns

Task

PrepareAsync(Stream, Stream, SignatureFieldOptions, ILogger?, CancellationToken)

Prepares a PDF for digital signing by appending signature dictionary, field, AcroForm, catalog, optional appearance, cross-reference table, and trailer to the output stream. The ByteRange placeholder is then back-filled with actual offsets.

public static Task<PdfSignaturePrepareResult> PrepareAsync(Stream inputPdf, Stream outputStream, SignatureFieldOptions options, ILogger? logger = null, CancellationToken cancellationToken = default)

Parameters

inputPdf Stream

outputStream Stream

options SignatureFieldOptions

logger ILogger

cancellationToken CancellationToken

Returns

Task<PdfSignaturePrepareResult>