/**
* Signs a document with a PAdES-LTV Timestamp. The document is closed at the end.
* @param sap the signature appearance
* @param tsa the timestamp generator
* @param signatureName the signature name or null to have a name generated
* automatically
* @throws Exception
*/
public static void Timestamp(PdfSignatureAppearance sap, ITSAClient tsa, String signatureName) {
int contentEstimated = tsa.GetTokenSizeEstimate();
sap.SetVisibleSignature(new Rectangle(0,0,0,0), 1, signatureName);
PdfSignature dic = new PdfSignature(PdfName.ADOBE_PPKLITE, PdfName.ETSI_RFC3161);
dic.Put(PdfName.TYPE, PdfName.DOCTIMESTAMP);
sap.CryptoDictionary = dic;
Dictionary<PdfName,int> exc = new Dictionary<PdfName,int>();
exc[PdfName.CONTENTS] = contentEstimated * 2 + 2;
sap.PreClose(exc);
Stream data = sap.RangeStream;
IDigest messageDigest = DigestUtilities.GetDigest(tsa.GetDigestAlgorithm());
byte[] buf = new byte[4096];
int n;
while ((n = data.Read(buf, 0, buf.Length)) > 0) {
messageDigest.BlockUpdate(buf, 0, n);
}
byte[] tsImprint = new byte[messageDigest.GetDigestSize()];
messageDigest.DoFinal(tsImprint, 0);
byte[] tsToken = tsa.GetTimeStampToken(tsImprint);
if (contentEstimated + 2 < tsToken.Length)
throw new Exception("Not enough space");
byte[] paddedSig = new byte[contentEstimated];
System.Array.Copy(tsToken, 0, paddedSig, 0, tsToken.Length);
PdfDictionary dic2 = new PdfDictionary();
dic2.Put(PdfName.CONTENTS, new PdfString(paddedSig).SetHexWriting(true));
sap.Close(dic2);
}
/**
* Signs a document with a PAdES-LTV Timestamp. The document is closed at the end.
* @param sap the signature appearance
* @param tsa the timestamp generator
* @param signatureName the signature name or null to have a name generated
* automatically
* @throws Exception
*/
public static void Timestamp(PdfSignatureAppearance sap, ITSAClient tsa, String signatureName)
{
int contentEstimated = tsa.GetTokenSizeEstimate();
sap.AddDeveloperExtension(PdfDeveloperExtension.ESIC_1_7_EXTENSIONLEVEL5);
sap.SetVisibleSignature(new Rectangle(0, 0, 0, 0), 1, signatureName);
PdfSignature dic = new PdfSignature(PdfName.ADOBE_PPKLITE, PdfName.ETSI_RFC3161);
dic.Put(PdfName.TYPE, PdfName.DOCTIMESTAMP);
sap.CryptoDictionary = dic;
Dictionary <PdfName, int> exc = new Dictionary <PdfName, int>();
exc[PdfName.CONTENTS] = contentEstimated * 2 + 2;
sap.PreClose(exc);
Stream data = sap.GetRangeStream();
IDigest messageDigest = tsa.GetMessageDigest();
byte[] buf = new byte[4096];
int n;
while ((n = data.Read(buf, 0, buf.Length)) > 0)
{
messageDigest.BlockUpdate(buf, 0, n);
}
byte[] tsImprint = new byte[messageDigest.GetDigestSize()];
messageDigest.DoFinal(tsImprint, 0);
byte[] tsToken;
try {
tsToken = tsa.GetTimeStampToken(tsImprint);
}
catch (Exception e) {
throw new GeneralSecurityException(e.Message);
}
//TODO jbonilla Validar para el TSA de Certificado que devuelve un valor muy grande.
if (contentEstimated + 2 < tsToken.Length)
{
throw new IOException("Not enough space");
}
byte[] paddedSig = new byte[contentEstimated];
System.Array.Copy(tsToken, 0, paddedSig, 0, tsToken.Length);
PdfDictionary dic2 = new PdfDictionary();
dic2.Put(PdfName.CONTENTS, new PdfString(paddedSig).SetHexWriting(true));
sap.Close(dic2);
}
/// <summary>Signs a document with a PAdES-LTV Timestamp.</summary>
/// <remarks>
/// Signs a document with a PAdES-LTV Timestamp. The document is closed at the end.
/// <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="tsa">the timestamp generator</param>
/// <param name="signatureName">
/// the signature name or null to have a name generated
/// automatically
/// </param>
/// <exception cref="System.IO.IOException"/>
/// <exception cref="Org.BouncyCastle.Security.GeneralSecurityException"/>
public virtual void Timestamp(ITSAClient tsa, String signatureName)
{
if (closed)
{
throw new PdfException(PdfException.ThisInstanceOfPdfSignerAlreadyClosed);
}
int contentEstimated = tsa.GetTokenSizeEstimate();
AddDeveloperExtension(PdfDeveloperExtension.ESIC_1_7_EXTENSIONLEVEL5);
SetFieldName(signatureName);
PdfSignature dic = new PdfSignature(PdfName.Adobe_PPKLite, PdfName.ETSI_RFC3161);
dic.Put(PdfName.Type, PdfName.DocTimeStamp);
cryptoDictionary = dic;
IDictionary <PdfName, int?> exc = new Dictionary <PdfName, int?>();
exc[PdfName.Contents] = contentEstimated * 2 + 2;
PreClose(exc);
Stream data = GetRangeStream();
IDigest messageDigest = tsa.GetMessageDigest();
byte[] buf = new byte[4096];
int n;
while ((n = data.Read(buf)) > 0)
{
messageDigest.Update(buf, 0, n);
}
byte[] tsImprint = messageDigest.Digest();
byte[] tsToken;
try {
tsToken = tsa.GetTimeStampToken(tsImprint);
}
catch (Exception e) {
throw new GeneralSecurityException(e.Message, e);
}
if (contentEstimated + 2 < tsToken.Length)
{
throw new System.IO.IOException("Not enough space");
}
byte[] paddedSig = new byte[contentEstimated];
System.Array.Copy(tsToken, 0, paddedSig, 0, tsToken.Length);
PdfDictionary dic2 = new PdfDictionary();
dic2.Put(PdfName.Contents, new PdfString(paddedSig).SetHexWriting(true));
Close(dic2);
closed = true;
}
/**
* Signs a document with a PAdES-LTV Timestamp. The document is closed at the end.
* @param sap the signature appearance
* @param tsa the timestamp generator
* @param signatureName the signature name or null to have a name generated
* automatically
* @throws Exception
*/
public static void Timestamp(PdfSignatureAppearance sap, ITSAClient tsa, String signatureName) {
int contentEstimated = tsa.GetTokenSizeEstimate();
sap.AddDeveloperExtension(PdfDeveloperExtension.ESIC_1_7_EXTENSIONLEVEL5);
sap.SetVisibleSignature(new Rectangle(0,0,0,0), 1, signatureName);
PdfSignature dic = new PdfSignature(PdfName.ADOBE_PPKLITE, PdfName.ETSI_RFC3161);
dic.Put(PdfName.TYPE, PdfName.DOCTIMESTAMP);
sap.CryptoDictionary = dic;
Dictionary<PdfName,int> exc = new Dictionary<PdfName,int>();
exc[PdfName.CONTENTS] = contentEstimated * 2 + 2;
sap.PreClose(exc);
Stream data = sap.GetRangeStream();
IDigest messageDigest = tsa.GetMessageDigest();
byte[] buf = new byte[4096];
int n;
while ((n = data.Read(buf, 0, buf.Length)) > 0) {
messageDigest.BlockUpdate(buf, 0, n);
}
byte[] tsImprint = new byte[messageDigest.GetDigestSize()];
messageDigest.DoFinal(tsImprint, 0);
byte[] tsToken;
try {
tsToken = tsa.GetTimeStampToken(tsImprint);
}
catch(Exception e) {
throw new GeneralSecurityException(e.Message);
}
//TODO jbonilla Validar para el TSA de Certificado que devuelve un valor muy grande.
if (contentEstimated + 2 < tsToken.Length)
throw new IOException("Not enough space");
byte[] paddedSig = new byte[contentEstimated];
System.Array.Copy(tsToken, 0, paddedSig, 0, tsToken.Length);
PdfDictionary dic2 = new PdfDictionary();
dic2.Put(PdfName.CONTENTS, new PdfString(paddedSig).SetHexWriting(true));
sap.Close(dic2);
}
