/**
* Sign the document using an external container, usually a PKCS7. The signature is fully composed
* externally, iText will just put the container inside the document.
* @param sap the PdfSignatureAppearance
* @param externalSignatureContainer the interface providing the actual signing
* @param estimatedSize the reserved size for the signature
* @throws GeneralSecurityException
* @throws IOException
* @throws DocumentException
*/
public static void SignExternalContainer(PdfSignatureAppearance sap, IExternalSignatureContainer externalSignatureContainer, int estimatedSize)
{
PdfSignature dic = new PdfSignature(null, null);
dic.Reason = sap.Reason;
dic.Location = sap.Location;
dic.SignatureCreator = sap.SignatureCreator;
dic.Contact = sap.Contact;
dic.Date = new PdfDate(sap.SignDate); // time-stamp will over-rule this
externalSignatureContainer.ModifySigningDictionary(dic);
sap.CryptoDictionary = dic;
Dictionary <PdfName, int> exc = new Dictionary <PdfName, int>();
exc[PdfName.CONTENTS] = estimatedSize * 2 + 2;
sap.PreClose(exc);
Stream data = sap.GetRangeStream();
byte[] encodedSig = externalSignatureContainer.Sign(data);
if (estimatedSize < encodedSig.Length)
{
throw new IOException("Not enough space");
}
byte[] paddedSig = new byte[estimatedSize];
System.Array.Copy(encodedSig, 0, paddedSig, 0, encodedSig.Length);
PdfDictionary dic2 = new PdfDictionary();
dic2.Put(PdfName.CONTENTS, new PdfString(paddedSig).SetHexWriting(true));
sap.Close(dic2);
}
/// <summary>Sign the document using an external container, usually a PKCS7.</summary>
/// <remarks>
/// Sign the document using an external container, usually a PKCS7. The signature is fully composed
/// externally, iText will just put the container inside the document.
/// <br /><br />
/// NOTE: This method closes the underlying pdf document. This means, that current instance
/// of PdfSigner cannot be used after this method call.
/// </remarks>
/// <param name="externalSignatureContainer">the interface providing the actual signing</param>
/// <param name="estimatedSize">the reserved size for the signature</param>
/// <exception cref="Org.BouncyCastle.Security.GeneralSecurityException"/>
/// <exception cref="System.IO.IOException"/>
public virtual void SignExternalContainer(IExternalSignatureContainer externalSignatureContainer, int estimatedSize
)
{
if (closed)
{
throw new PdfException(PdfException.ThisInstanceOfPdfSignerAlreadyClosed);
}
PdfSignature dic = new PdfSignature();
PdfSignatureAppearance appearance = GetSignatureAppearance();
dic.SetReason(appearance.GetReason());
dic.SetLocation(appearance.GetLocation());
dic.SetSignatureCreator(appearance.GetSignatureCreator());
dic.SetContact(appearance.GetContact());
dic.SetDate(new PdfDate(GetSignDate()));
// time-stamp will over-rule this
externalSignatureContainer.ModifySigningDictionary(dic.GetPdfObject());
cryptoDictionary = dic;
IDictionary <PdfName, int?> exc = new Dictionary <PdfName, int?>();
exc[PdfName.Contents] = estimatedSize * 2 + 2;
PreClose(exc);
Stream data = GetRangeStream();
byte[] encodedSig = externalSignatureContainer.Sign(data);
if (estimatedSize < encodedSig.Length)
{
throw new System.IO.IOException("Not enough space");
}
byte[] paddedSig = new byte[estimatedSize];
System.Array.Copy(encodedSig, 0, paddedSig, 0, encodedSig.Length);
PdfDictionary dic2 = new PdfDictionary();
dic2.Put(PdfName.Contents, new PdfString(paddedSig).SetHexWriting(true));
Close(dic2);
closed = true;
}
/**
* Sign the document using an external container, usually a PKCS7. The signature is fully composed
* externally, iText will just put the container inside the document.
* @param sap the PdfSignatureAppearance
* @param externalSignatureContainer the interface providing the actual signing
* @param estimatedSize the reserved size for the signature
* @throws GeneralSecurityException
* @throws IOException
* @throws DocumentException
*/
public static void SignExternalContainer(PdfSignatureAppearance sap, IExternalSignatureContainer externalSignatureContainer, int estimatedSize) {
PdfSignature dic = new PdfSignature(null, null);
dic.Reason = sap.Reason;
dic.Location = sap.Location;
dic.SignatureCreator = sap.SignatureCreator;
dic.Contact = sap.Contact;
dic.Date = new PdfDate(sap.SignDate); // time-stamp will over-rule this
externalSignatureContainer.ModifySigningDictionary(dic);
sap.CryptoDictionary = dic;
Dictionary<PdfName, int> exc = new Dictionary<PdfName, int>();
exc[PdfName.CONTENTS] = estimatedSize * 2 + 2;
sap.PreClose(exc);
Stream data = sap.GetRangeStream();
byte[] encodedSig = externalSignatureContainer.Sign(data);
if (estimatedSize < encodedSig.Length)
throw new IOException("Not enough space");
byte[] paddedSig = new byte[estimatedSize];
System.Array.Copy(encodedSig, 0, paddedSig, 0, encodedSig.Length);
PdfDictionary dic2 = new PdfDictionary();
dic2.Put(PdfName.CONTENTS, new PdfString(paddedSig).SetHexWriting(true));
sap.Close(dic2);
}
