ProviderCreatePreparedSignature Method

Create a configuration to prepare a signature for an external signature handler

This method is part of a very specialized use case requiring an external signature handler. The process using an external signature handler is:

CreatePreparedSignature(Int32, String, String): Create the signature configuration.
AddPreparedSignature(Document, SignatureConfiguration, Stream, OutputOptions): Create the document with the prepared signature.
GetHash(HashAlgorithm): Calculate the hash from the document and create the signature using an external signature handler.
ReadExternalSignature(Byte): Create signature configuration for the external signature.
SignPreparedSignature(Document, SignatureConfiguration, Stream): Insert the external signature into the document with the prepared signature.

Namespace: PdfTools.Crypto.Providers.BuiltIn
Assembly: PdfTools (in PdfTools.dll) Version: 1.7.0+cfcc11b476b3e1eb4320f0f37269191f64e36bd8

Syntax

public SignatureConfiguration CreatePreparedSignature(
	int size,
	string format,
	string name
)

size Int32: The expected size of the cryptographic signature that will be added later. This is the number of bytes that will be reserved in the prepared signature.
format String: The format (SubFilter) of the cryptographic signature that is added later. For example, "adbe.pkcs7.detached" or "ETSI.CAdES.detached".
name String: The name of the signer of the cryptographic signature that will be added later.

Exceptions

Exception	Condition
ArgumentNullException	if format is .
ArgumentNullException	if name is .