/**
* 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.GetRangeStream();
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);
}
private static void SetSigPosition(PdfSignatureAppearance sigAppearance, int oldSigCount)
{
//Note: original formula from QuangNgV, ll = lower left, ur = upper right, coordinates are calculated relative from the lower left of the pdf page
float llx = (100 + 20) * (oldSigCount % 5),
lly = (25 + 20) * (oldSigCount / 5),
urx = llx + 100,
ury = lly + 25;
sigAppearance.SetVisibleSignature(new Rectangle(llx, lly, urx, ury), 1, null);
}
private void signPDF(int llx, int lly, int urx, int ury)
{
// Do something interesting with unsigned PDF document
FileInfo unsignedPdfInfo = new FileInfo(unsignedPdfPath);
//Assert.IsTrue(unsignedPdfInfo.Length > 0);
// Specify path to the unmanaged PCKS#11 library
string libraryPath = @"C:\Windows\System32\cvP11.dll";
// Specify serial number of the token that contains signing key. May be null if tokenLabel is specified.
string tokenSerial = @"910e21b0da172e34";
// Specify label of of the token that contains signing key. May be null if tokenSerial is specified
string tokenLabel = @"SuisseID";
// Specify PIN for the token
string pin = "091011";
// Specify label (value of CKA_LABEL attribute) of the private key used for signing. May be null if ckaId is specified.
string ckaLabel = null;
// Specify hex encoded string with identifier (value of CKA_ID attribute) of the private key used for signing. May be null if ckaLabel is specified.
string ckaId = "6D808CE0BF9C368FB0AD28E24366F646BA0B3F67";
// Specify hash algorihtm used for the signature creation
HashAlgorithm hashAlgorithm = HashAlgorithm.SHA256;
// Create instance of Pkcs11Signature class that allows iText to create PKCS#1 v1.5 RSA signature with the private key stored on PKCS#11 compatible device
using (Pkcs11RsaSignature pkcs11RsaSignature = new Pkcs11RsaSignature(libraryPath, tokenSerial, tokenLabel, pin, ckaLabel, ckaId, HashAlgorithm.SHA256))
{
// When signing certificate is stored on the token it can be usually read with GetSigningCertificate() method
byte[] signingCertificate = pkcs11RsaSignature.GetSigningCertificate();
// All certificates stored on the token can be usually read with GetAllCertificates() method
List <byte[]> otherCertificates = pkcs11RsaSignature.GetAllCertificates();
// Build certification path for the signing certificate
ICollection <Org.BouncyCastle.X509.X509Certificate> certPath = CertUtils.BuildCertPath(signingCertificate, otherCertificates);
// Read unsigned PDF document
using (PdfReader pdfReader = new PdfReader(unsignedPdfPath))
{
// Create output stream for signed PDF document
using (FileStream outputStream = new FileStream(signedPdfPath, FileMode.Create))
{
// Create PdfStamper that applies extra content to the PDF document
using (PdfStamper pdfStamper = PdfStamper.CreateSignature(pdfReader, outputStream, '\0', Path.GetTempFileName(), true))
{
// Sign PDF document
PdfSignatureAppearance signatureAppearance = pdfStamper.SignatureAppearance;
signatureAppearance.SignatureRenderingMode = PdfSignatureAppearance.RenderingMode.GRAPHIC_AND_DESCRIPTION;
signatureAppearance.SignatureGraphic = iTextSharp.text.Image.GetInstance("logo_sign.png");
signatureAppearance.SetVisibleSignature(new iTextSharp.text.Rectangle((float)llx, (float)lly, (float)urx, (float)ury), 1, null);
MakeSignature.SignDetached(pdfStamper.SignatureAppearance, pkcs11RsaSignature, certPath, null, null, null, 0, CryptoStandard.CADES);
//MakeSignature.SignDetached(pdfStamper.SignatureAppearance, pkcs11RsaSignature, certPath, null, null, null, 0, CryptoStandard.CADES);
}
}
}
}
// Do something interesting with the signed PDF document
FileInfo signedPdfInfo = new FileInfo(signedPdfPath);
//Assert.IsTrue(signedPdfInfo.Length > signedPdfPath.Length);
}
public string GenerateHash()
{
string Reason = "Motivo";
string Location = "Localização";
string Contact = "Contato";
string signatureFieldName = null;
appearance.SetVisibleSignature(new Rectangle(500, 150, 400, 200), 1, signatureFieldName);
appearance.SignDate = DateTime.Now;
appearance.Reason = Reason;
appearance.Location = Location;
appearance.Contact = Contact;
StringBuilder buf = new StringBuilder();
buf.Append("Digitally signed by");
buf.Append("\n");
buf.Append(userName);
buf.Append("\n");
buf.Append("Date: " + appearance.SignDate);
appearance.Layer2Text = buf.ToString();
appearance.Acro6Layers = true;
appearance.CertificationLevel = 0;
PdfSignature dic = GeneratePdfSignature();
appearance.CryptoDictionary = dic;
Dictionary <PdfName, int> exclusionSizes = new Dictionary <PdfName, int>();
exclusionSizes.Add(PdfName.CONTENTS, (RESERVED_SPACE_SIGNATURE * 2) + 2);
appearance.PreClose(exclusionSizes);
HashAlgorithm sha = new SHA256CryptoServiceProvider();
Stream s = appearance.GetRangeStream();
int read = 0;
byte[] buff = new byte[0x2000];
while ((read = s.Read(buff, 0, 0x2000)) > 0)
{
sha.TransformBlock(buff, 0, read, buff, 0);
}
sha.TransformFinalBlock(buff, 0, 0);
StringBuilder hex = new StringBuilder(sha.Hash.Length * 2);
foreach (byte b in sha.Hash)
{
hex.AppendFormat("{0:x2}", b);
}
return(hex.ToString());
}
public static void DigitalSign()
{
PdfReader reader = new PdfReader(@"C:\workspace\PDFDigitalSign\Resource\Result1.pdf");
using (FileStream fout = new FileStream(@"C:\workspace\PDFDigitalSign\Resource\Result2.pdf", FileMode.Create, FileAccess.ReadWrite))
{
// appearance
PdfStamper stamper = PdfStamper.CreateSignature(reader, fout, '\0', null, true);
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
//appearance.Reason = SignReason;
//appearance.Location = SignLocation;
appearance.SignDate = DateTime.Now.Date;
appearance.SetVisibleSignature(new iTextSharp.text.Rectangle(100, 100, 50 + 200, 50 + 100), 1, null);//.IsInvisible
// Custom text and background image
appearance.Image = iTextSharp.text.Image.GetInstance(@"C:\workspace\PDFDigitalSign\Resource\sign2.png");
appearance.ImageScale = 0.6f;
appearance.Image.Alignment = 300;
appearance.Acro6Layers = true;
StringBuilder buf = new StringBuilder();
buf.Append("Digitally Signed by ");
String name = "Sidd";
buf.Append(name).Append('\n');
buf.Append("Date: ").Append(DateTime.Now.ToString("dd-MM-yyyy HH:mm:ss zzz"));
string text = buf.ToString();
appearance.Layer2Text = text;
var pk12 = new Pkcs12Store(new System.IO.FileStream(@"C:\workspace\PDFDigitalSign\Resource\certificate.pfx", System.IO.FileMode.Open, System.IO.FileAccess.Read), "12345678".ToCharArray());
string alias = null;
foreach (string tAlias in pk12.Aliases)
{
if (pk12.IsKeyEntry(tAlias))
{
alias = tAlias;
break;
}
}
var pk = pk12.GetKey(alias).Key;
//digital signature
IExternalSignature es = new PrivateKeySignature(pk, "SHA-256");
MakeSignature.SignDetached(appearance, es, new Org.BouncyCastle.X509.X509Certificate[] { pk12.GetCertificate(alias).Certificate }, null, null, null, 0, CryptoStandard.CMS);
stamper.Close();
}
}
public void EmptySignature(String src, String dest, String fieldname, IList <X509Certificate> chain)
{
PdfReader reader = new PdfReader(src);
FileStream os = new FileStream(dest, FileMode.Create);
PdfStamper stamper = PdfStamper.CreateSignature(reader, os, '\0');
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.SetVisibleSignature(new Rectangle(36, 748, 144, 780), 1, fieldname);
appearance.Certificate = chain[0];
IExternalSignatureContainer external = new ExternalBlankSignatureContainer(PdfName.ADOBE_PPKLITE,
PdfName.ADBE_PKCS7_DETACHED);
MakeSignature.SignExternalContainer(appearance, external, 8192);
}
public bool signSupportingDoc(string RefID, string DocumentPath, string CertificateSavePath, Stream privateKeyStream, string keyPassword)
{
try
{
Pkcs12Store pk12 = new Pkcs12Store(privateKeyStream, keyPassword.ToCharArray());
privateKeyStream.Dispose();
//then Iterate throught certificate entries to find the private key entry
string alias = null;
foreach (string tAlias in pk12.Aliases)
{
if (pk12.IsKeyEntry(tAlias))
{
alias = tAlias;
break;
}
}
var pk = pk12.GetKey(alias).Key;
// reader and stamper
PdfReader reader = new PdfReader(DocumentPath);
int PageCount = reader.NumberOfPages;
using (FileStream fout = new FileStream(CertificateSavePath, FileMode.Create, FileAccess.ReadWrite))
{
using (PdfStamper stamper = PdfStamper.CreateSignature(reader, fout, '\0', null, true))
{
// appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
//appearance.Image = new iTextSharp.text.pdf.PdfImage();
appearance.Reason = "Sign Request (Ref : " + RefID + ")";
// appearance.Location = location; (0, 0, 320, 72) Lower left conner
appearance.SetVisibleSignature(new iTextSharp.text.Rectangle(600, 0, 400, 72), PageCount, "Icsi-Vendor");
//digital signature
IExternalSignature es = new PrivateKeySignature(pk, "SHA-256");
MakeSignature.SignDetached(appearance, es, new Org.BouncyCastle.X509.X509Certificate[] { pk12.GetCertificate(alias).Certificate }, null, null, null, 0, CryptoStandard.CMS);
stamper.Close();
}
}
return(true);
}
catch (Exception Ex)
{
ErrorLog.LogError(Ex);
return(false);
}
}
/**
* 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);
}
public void SignDocument()
{
//if( !IsLoaded ) { return; } //TODO: PdfDocumentWrapper.SignDocument(): consider throwing an exception on null.
PdfReader reader = new PdfReader(new byte[0]);
Document document = new Document(reader.GetPageSizeWithRotation(1));
using (MemoryStream stream = new MemoryStream())
{
PdfStamper stp = PdfStamper.CreateSignature(reader, stream, PdfWriter.VERSION_1_7);
PdfSignatureAppearance sap = stp.SignatureAppearance;
sap.SetVisibleSignature("blah");
sap.SignDate = DateTime.Now;
sap.SetCrypto(null, null, null, null);
sap.Reason = "";
sap.Location = "";
sap.Acro6Layers = true;
sap.Render = PdfSignatureAppearance.SignatureRender.NameAndDescription;
PdfSignature sig = new PdfSignature(PdfName.ADOBE_PPKLITE, PdfName.ADBE_PKCS7_DETACHED);
sig.Date = new PdfDate(sap.SignDate);
//sig.Name = PdfPKCS7.GetSubjectFields(
sig.Reason = sap.Reason;
sig.Location = sap.Location;
sap.CryptoDictionary = sig;
Dictionary <PdfName, int> dic = new Dictionary <PdfName, int>();
dic[PdfName.CONTENTS] = 4000 * 2 + 2;
sap.PreClose(dic);
//PdfCopy writer = new PdfCopy( document, stream );
//document.Open();
//for( int i = 0; i < reader.NumberOfPages; )
//{
// writer.AddPage( writer.GetImportedPage( reader, ++i ) );
//}
//PRAcroForm form = reader.AcroForm;
//if( form != null ) { writer.CopyAcroForm( reader ); }
stp.Close();
document.Close();
reader.Close();
//_pdf = stream.ToArray();
}
}
/// <summary>
/// Initialize the PDF signature field.
/// </summary>
private void InitSignatureField(PdfStamper stamper)
{
if (_acroFieldsWorker.HasSignatureField(SignatureFieldName))
{
_signatureAppearance.SetVisibleSignature(SignatureFieldName);
}
else
{
if (!string.IsNullOrWhiteSpace(SignatureFieldName) &&
_acroFieldsWorker.HasField(SignatureFieldName))
{
var textField = _acroFieldsWorker.FieldLocationByName(SignatureFieldName);
_signatureAppearance.SetVisibleSignature(
textField.Rectangle, textField.Page,
_signatureAppearance.GetNewSigName()
);
stamper.FormFlattening = true;
stamper.PartialFormFlattening(SignatureFieldName);
}
else if (SignatureBox != null)
{
_signatureAppearance.SetVisibleSignature(
SignatureBox,
// reader.NumberOfPages,
1,
_signatureAppearance.GetNewSigName()
);
stamper.FormFlattening = true;
// stamper.PartialFormFlattening(SignatureFieldName);
}
else
{
throw new InvalidOperationException("field does not exist");
}
}
}
//schimbare functie pentru iText
private string generateHash()
{
appearance.SetVisibleSignature(new Rectangle(500, 150, 400, 200), 1, "signature");
appearance.SignDate = DateTime.Now;
appearance.Reason = "Test Licenta";
appearance.Location = "Bucuresti";
appearance.Contact = "mta";
StringBuilder buf = new StringBuilder();
buf.Append("Semnat digital de");
buf.Append("\n");
buf.Append(userName);
buf.Append("\n");
buf.Append("Date: " + appearance.SignDate);
appearance.Layer2Text = buf.ToString();
appearance.Acro6Layers = true;
appearance.CertificationLevel = 0;
PdfSignature dic = new PdfSignature(PdfName.ADOBE_PPKLITE, PdfName.ADBE_PKCS7_DETACHED)
{
Date = new PdfDate(appearance.SignDate),
Name = userName
};
dic.Reason = appearance.Reason;
dic.Location = appearance.Location;
dic.Contact = appearance.Contact;
appearance.CryptoDictionary = dic;
Dictionary <PdfName, int> exclusionSizes = new Dictionary <PdfName, int>();
exclusionSizes.Add(PdfName.CONTENTS, (csize * 2) + 2);
appearance.PreClose(exclusionSizes);
HashAlgorithm sha = new SHA256CryptoServiceProvider();
Stream s = appearance.GetRangeStream();
int read = 0;
byte[] buff = new byte[0x2000];
while ((read = s.Read(buff, 0, 0x2000)) > 0)
{
sha.TransformBlock(buff, 0, read, buff, 0);
}
sha.TransformFinalBlock(buff, 0, 0);
return(System.Convert.ToBase64String(sha.Hash));
}
/// <summary>
/// Firma un documento PDF
/// </summary>
/// <param name="Source">Path del PDF a firmar</param>
/// <param name="Target">Path del PDF firmado</param>
/// <param name="Certificate">Certificado para realizar la firma</param>
/// <param name="Reason">Motivo</param>
/// <param name="Location">Ubicación</param>
/// <param name="AddVisibleSign">Indica si la firma es visible dentro del documento</param>
/// <param name="AddTimeStamp">Indica si se va a añadir sello de tiempo en el documento</param>
/// <param name="strTSA">TSA del sello de tiempo</param>
public static void SignHashed(string Source, string Target, SysX509.X509Certificate2 Certificate, string Reason, string Location, bool AddVisibleSign, bool AddTimeStamp, string strTSA)
{
X509CertificateParser objCP = new X509CertificateParser();
X509Certificate[] objChain = new X509Certificate[] { objCP.ReadCertificate(Certificate.RawData) };
//IList<ICrlClient> crlList = new List<ICrlClient>();
//crlList.Add(new CrlClientOnline(objChain));
PdfReader objReader = new PdfReader(Source);
PdfStamper objStamper = PdfStamper.CreateSignature(objReader, new FileStream(Target, FileMode.Create), '\0', null, true);
// Creamos la apariencia
PdfSignatureAppearance signatureAppearance = objStamper.SignatureAppearance;
signatureAppearance.Reason = Reason;
signatureAppearance.Location = Location;
// Si está la firma visible:
if (AddVisibleSign)
{
signatureAppearance.SetVisibleSignature(new Rectangle(100, 100, 300, 200), 1, null); //signatureAppearance.SetVisibleSignature(new Rectangle(100, 100, 250, 150), objReader.NumberOfPages, "Signature");
}
ITSAClient tsaClient = null;
IOcspClient ocspClient = null;
// Si se ha añadido el sello de tiempo
if (AddTimeStamp)
{
// ocspClient = new OcspClientBouncyCastle();
tsaClient = new TSAClientBouncyCastle(strTSA);
}
// Creating the signature
// IExternalSignature externalSignature = new X509Certificate2Signature(Certificate, "SHA-1");
// MakeSignature.SignDetached(signatureAppearance, externalSignature, objChain, crlList, ocspClient, tsaClient, 0, CryptoStandard.CMS);
if (objReader != null)
{
objReader.Close();
}
if (objStamper != null)
{
objStamper.Close();
}
}
public void Sign(String src, String dest, ICollection <X509Certificate> chain, ICipherParameters pk,
String digestAlgorithm, CryptoStandard subfilter, String reason, String location)
{
// Creating the reader and the stamper
PdfReader reader = new PdfReader(src);
FileStream os = new FileStream(dest, FileMode.Create);
PdfStamper stamper = PdfStamper.CreateSignature(reader, os, '\0');
// Creating the appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = reason;
appearance.Location = location;
appearance.SetVisibleSignature(new Rectangle(36, 748, 144, 780), 1, "sig");
// Creating the signature
IExternalSignature pks = new PrivateKeySignature(pk, digestAlgorithm);
MakeSignature.SignDetached(appearance, pks, chain, null, null, null, 0, subfilter);
}
static void Main(string[] args)
{
//All pdf files are fetched from a particular folder
string[] pdfFiles = Directory.GetFiles("PATH1", "*.pdf")
.Select(Path.GetFileName)
.ToArray();
string[] pdfpaths = Directory.GetFiles("PATH1", "*.pdf").ToArray();
string[] newfilepaths = new string[50];
int[] psn = new int[50];
string[] ski;
for (int i = 0; i < pdfFiles.Length; i++)
{
psn[i] = PSNumber(pdfFiles[i]);
string[] address = { @"PATH2", pdfFiles[i] };
newfilepaths[i] = Path.Combine(address);
}
ski = details(psn);
for (int i = 0; psn[i] != 0; i++)
{
X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
X509Certificate2Collection fcollection = (X509Certificate2Collection)collection.Find(X509FindType.FindBySubjectKeyIdentifier, ski[i], true);
X509Certificate2 digitalID = fcollection[0];
PdfReader reader = new PdfReader(pdfpaths[i]);
PdfStamper stamper = PdfStamper.CreateSignature(reader,
new FileStream(newfilepaths[i], FileMode.Create), '\0');
PdfSignatureAppearance sap = stamper.SignatureAppearance;
sap.SetVisibleSignature(new iTextSharp.text.Rectangle(100, 100, 250, 150), 1, null);
BcX509.X509Certificate bcCert = DotNetUtils.FromX509Certificate(digitalID);
var chain = new List <BcX509.X509Certificate> {
bcCert
};
var privatekey = Org.BouncyCastle.Security.DotNetUtilities.GetKeyPair(digitalID.PrivateKey).Private;
IExternalSignature es = new PrivateKeySignature(privatekey, "SHA-256");
MakeSignature.SignDetached(sap, es, chain,
null, null, null, 0, CryptoStandard.CMS);
stamper.Close();
store.Close();
}
}
public void SignIt()
{
var fileStream = new FileStream("../../keystore2.pfx", FileMode.Open, FileAccess.Read);
var pk12 = new Pkcs12Store(fileStream, "barantopal".ToCharArray());
fileStream.Flush();
fileStream.Close();
string alias = null;
// a loop is not super need here but well because we have 1 certificate entry that corresponds to a private key
foreach (string tAlias in pk12.Aliases)
{
if (pk12.IsKeyEntry(tAlias))
{
alias = tAlias;
break;
}
}
var pk = pk12.GetKey(alias).Key;
// reader and stamper
var reader = new PdfReader(SourceFilePath);
using (var fout = new FileStream(DestinationFilePath, FileMode.Create, FileAccess.ReadWrite))
{
using (PdfStamper stamper = PdfStamper.CreateSignature(reader, fout, '\0'))
{
// appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
//appearance.Image = new iTextSharp.text.pdf.PdfImage();
appearance.Reason = "I've written this.";
appearance.Location = "Foobar";
appearance.SetVisibleSignature(new iTextSharp.text.Rectangle(20, 10, 170, 60), 1, "Icsi-Vendor");
// digital signature
IExternalSignature es = new PrivateKeySignature(pk, "SHA-256");
MakeSignature.SignDetached(appearance, es, new X509Certificate[] { pk12.GetCertificate(alias).Certificate }, null, null, null, 0, CryptoStandard.CMS);
stamper.Close();
}
}
}
private static PdfSignatureAppearance GetPdfSignatureAppearance(SigningCertificates signingCertificates, PdfStamper stamper, PdfReader reader, PdfSignatureParameters parameters)
{
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = "";
appearance.LocationCaption = "";
appearance.Location = "";
appearance.Layer4Text = "";
appearance.Layer2Text = GetSignatureText(signingCertificates.X509Certificate, parameters);
appearance.Acro6Layers = true;
Rectangle cropBox = reader.GetCropBox(parameters.SignaturePageNumber);
Rectangle rectangle = GetSignatureLocation(cropBox, parameters);
appearance.SetVisibleSignature(rectangle, parameters.SignaturePageNumber, parameters.SignatureName);
return(appearance);
}
public void Sign(String src, String dest,
ICollection <X509Certificate> chain, X509Certificate2 pk,
String digestAlgorithm, CryptoStandard subfilter,
String reason, String location,
ICollection <ICrlClient> crlList,
IOcspClient ocspClient,
ITSAClient tsaClient,
int estimatedSize)
{
// Creating the reader and the stamper
PdfReader reader = null;
PdfStamper stamper = null;
FileStream os = null;
try {
reader = new PdfReader(src);
os = new FileStream(dest, FileMode.Create);
stamper = PdfStamper.CreateSignature(reader, os, '\0');
// Creating the appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = reason;
appearance.Location = location;
appearance.SetVisibleSignature(new Rectangle(36, 748, 144, 780), 1, "sig");
// Creating the signature
IExternalSignature pks = new X509Certificate2Signature(pk, digestAlgorithm);
MakeSignature.SignDetached(appearance, pks, chain, crlList, ocspClient, tsaClient, estimatedSize,
subfilter);
}
finally {
if (reader != null)
{
reader.Close();
}
if (stamper != null)
{
stamper.Close();
}
if (os != null)
{
os.Close();
}
}
}
public void Sign(string SigReason, string SigContact, string SigLocation, bool visible)
{
PdfReader reader = null;
PdfStamper stamper = null;
try
{
reader = new PdfReader(this.inputPDF);
//激活多签名
stamper = PdfStamper.CreateSignature(reader, new FileStream(this.outputPDF, FileMode.Create, FileAccess.Write), '\0', null, true);
//禁用多签名请取消该行注释，每一个新签名将覆盖旧的签名
//stamper = PdfStamper.CreateSignature(reader, new FileStream(this.outputPDF, FileMode.Create, FileAccess.Write), '\0');
stamper.MoreInfo = metadata.getMetaData();
stamper.XmpMetadata = this.metadata.getStreamedMetaData();
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = SigReason;
appearance.Contact = SigContact;
appearance.Location = SigLocation;
appearance.SetVisibleSignature(new iTextSharp.text.Rectangle(40, 748, 164, 780), 1, "sig");
appearance.CertificationLevel = PdfSignatureAppearance.CERTIFIED_NO_CHANGES_ALLOWED;
appearance.Layer2Font = new Font(BaseFont.CreateFont(@"c:/windows/fonts/simsun.ttc,0", BaseFont.IDENTITY_H, BaseFont.EMBEDDED), 4);
IExternalSignature pks = new PrivateKeySignature(this.myCert.Akp, DigestAlgorithms.SHA256);
MakeSignature.SignDetached(appearance, pks, this.myCert.Chain, null, null, null, 0, CryptoStandard.CMS);
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (reader != null)
{
reader.Close();
}
DelectFile(this.inputPDF);
}
}
/**
* 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.GetRangeStream();
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);
}
private static PdfSignatureAppearance GetPSA(string fieldName,
PdfStamper stamper,
Bitmap graphics,
string reason,
string location,
PdfSignatureAppearance.SignatureRender renderingMode,
int certLevel)
{
PdfSignatureAppearance psa = stamper.SignatureAppearance;
psa.Acro6Layers = true;
psa.SignatureGraphic = iTextSharp.text.Image.GetInstance(graphics, ImageFormat.Png);
psa.Render = renderingMode;
psa.CertificationLevel = certLevel;
psa.Reason = reason;
psa.Location = location;
psa.SetVisibleSignature(fieldName);
return(psa);
}
public void Sign4(String src, String name, String dest, ICollection <X509Certificate> chain, ICipherParameters pk,
String digestAlgorithm, CryptoStandard subfilter, String reason, String location)
{
// Creating the reader and the stamper
PdfReader reader = new PdfReader(src);
FileStream os = new FileStream(dest, FileMode.Create);
PdfStamper stamper = PdfStamper.CreateSignature(reader, os, '\0');
// Creating the appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = reason;
appearance.Location = location;
appearance.SetVisibleSignature(name);
// Default text and scaled background image
appearance.Image = Image.GetInstance(IMG);
appearance.ImageScale = -1;
// Creating the signature
IExternalSignature pks = new PrivateKeySignature(pk, digestAlgorithm);
MakeSignature.SignDetached(appearance, pks, chain, null, null, null, 0, subfilter);
}
public void SignPdf(string filename, string outFilename)
{
PdfReader reader = new PdfReader(filename);
PdfStamper st = PdfStamper.CreateSignature(reader, new FileStream(outFilename, FileMode.Create, FileAccess.Write), '\0', null, true);
PdfSignatureAppearance sap = st.SignatureAppearance;
sap.Reason = "税单完整性";
sap.Location = "广州海关";
sap.SetVisibleSignature(new iTextSharp.text.Rectangle(450, 100, 650, 200), 1, "sig");
sap.ImageScale = 1;
sap.Layer2Text = "此文档由广州海关签名";
sap.SignatureRenderingMode = PdfSignatureAppearance.RenderingMode.GRAPHIC_AND_DESCRIPTION;
sap.SignatureGraphic = Stamp;
IExternalSignature signature = new PrivateKeySignature(PrivateKey, "SHA-256");
MakeSignature.SignDetached(sap, signature, CertChain, null, null, null, 0, CryptoStandard.CMS);
}
private void addVisibleSignature(PdfSignatureAppearance signAppearance, PdfStamper stamper)
{
if (SignatureData.VisibleSignature == null)
{
return;
}
signAppearance.Image = string.IsNullOrEmpty(SignatureData.VisibleSignature.ImagePath) ? null : Image.GetInstance(SignatureData.VisibleSignature.ImagePath);
signAppearance.Layer2Text = SignatureData.VisibleSignature.CustomText;
if (SignatureData.VisibleSignature.RunDirection == null)
{
SignatureData.VisibleSignature.RunDirection = PdfRunDirection.LeftToRight;
}
signAppearance.RunDirection = (int)SignatureData.VisibleSignature.RunDirection;
signAppearance.Layer2Font = SignatureData.VisibleSignature.Font.Fonts[0];
var pageNumber = SignatureData.VisibleSignature.UseLastPageToShowSignature ? stamper.Reader.NumberOfPages : SignatureData.VisibleSignature.PageNumberToShowSignature;
signAppearance.SetVisibleSignature(SignatureData.VisibleSignature.Position, pageNumber, null);
}
public void Sign1(String src, String name, String dest, ICollection <X509Certificate> chain, ICipherParameters pk,
String digestAlgorithm, CryptoStandard subfilter, String reason, String location)
{
// Creating the reader and the stamper
PdfReader reader = new PdfReader(src);
FileStream os = new FileStream(dest, FileMode.Create);
PdfStamper stamper = PdfStamper.CreateSignature(reader, os, '\0');
// Creating the appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = reason;
appearance.Location = location;
appearance.SetVisibleSignature(name);
// Custom text and custom font
appearance.Layer2Text = "This document was signed by Bruno Specimen";
appearance.Layer2Font = new Font(Font.FontFamily.TIMES_ROMAN);
// Creating the signature
IExternalSignature pks = new PrivateKeySignature(pk, digestAlgorithm);
MakeSignature.SignDetached(appearance, pks, chain, null, null, null, 0, subfilter);
}
public void FillOutAndSign(String keystore, String src, String name, String fname, String value, String dest)
{
Pkcs12Store store = new Pkcs12Store(new FileStream(keystore, FileMode.Open), PASSWORD);
String alias = "";
ICollection <X509Certificate> chain = new List <X509Certificate>();
// searching for private key
foreach (string al in store.Aliases)
{
if (store.IsKeyEntry(al) && store.GetKey(al).Key.IsPrivate)
{
alias = al;
break;
}
}
AsymmetricKeyEntry pk = store.GetKey(alias);
foreach (X509CertificateEntry c in store.GetCertificateChain(alias))
{
chain.Add(c.Certificate);
}
RsaPrivateCrtKeyParameters parameters = pk.Key as RsaPrivateCrtKeyParameters;
PdfReader reader = new PdfReader(src);
FileStream os = new FileStream(dest, FileMode.Create);
PdfStamper stamper = PdfStamper.CreateSignature(reader, os, '\0', null, true);
AcroFields form = stamper.AcroFields;
form.SetField(fname, value);
form.SetFieldProperty(name, "setfflags", PdfFormField.FF_READ_ONLY, null);
form.SetFieldProperty(fname, "setfflags", PdfFormField.FF_READ_ONLY, null);
// Creating the appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.SetVisibleSignature(name);
// Creating the signature
PrivateKeySignature pks = new PrivateKeySignature(parameters, DigestAlgorithms.SHA256);
MakeSignature.SignDetached(appearance, pks, chain, null, null, null, 0, CryptoStandard.CMS);
}
public void Sign(PdfSignatureAp sigAP)
{
PdfReader reader = new PdfReader(this._inputPdf);
FileStream fs = new FileStream(this._outputPdf, FileMode.Create, FileAccess.Write);
PdfStamper st = PdfStamper.CreateSignature(reader, fs, '\0', null, sigAP.Multi);
try
{
PdfSignatureAppearance sap = st.SignatureAppearance;
sap.SignDate = DateTime.Now;
sap.Reason = sigAP.SigReason;
sap.Contact = sigAP.SigContact;
sap.Location = sigAP.SigLocation;
if (sigAP.Visible)
{
iTextSharp.text.Rectangle rect = st.Reader.GetPageSize(sigAP.Page);
sap.Image = sigAP.RawData == null ? null : iTextSharp.text.Image.GetInstance(sigAP.RawData);
sap.Layer2Text = sigAP.CustomText;
sap.SetVisibleSignature(new iTextSharp.text.Rectangle(sigAP.SigX, sigAP.SigY, sigAP.SigX + sigAP.SigW, sigAP.SigY + sigAP.SigH), sigAP.Page, null);
}
PdfSignature dic = new PdfSignature(PdfName.ADOBE_PPKLITE, new PdfName("adbe.pkcs7.detached"));
dic.Reason = sap.Reason;
dic.Location = sap.Location;
dic.Contact = sap.Contact;
dic.Date = new PdfDate(sap.SignDate);
sap.CryptoDictionary = dic;
IOcspClient ocsp = new OcspClientBouncyCastle();
PrivateKeySignature pks = new PrivateKeySignature(_cert.Akp, "SHA1");
MakeSignature.SignDetached(sap, pks, _cert.Chain, null, ocsp, null, 0, CryptoStandard.CMS);
}
finally
{
st.Close();
fs.Close();
}
}
public void Sign2(String src, String name, String dest, ICollection <X509Certificate> chain, ICipherParameters pk,
String digestAlgorithm, CryptoStandard subfilter, String reason, String location)
{
// Creating the reader and the stamper
PdfReader reader = new PdfReader(src);
FileStream os = new FileStream(dest, FileMode.Create);
PdfStamper stamper = PdfStamper.CreateSignature(reader, os, '\0');
// Creating the appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = reason;
appearance.Location = location;
appearance.SetVisibleSignature(name);
// Custom text, custom font, and right-to-left writing
appearance.Layer2Text = "\u0644\u0648\u0631\u0627\u0646\u0633 \u0627\u0644\u0639\u0631\u0628";
appearance.RunDirection = PdfWriter.RUN_DIRECTION_RTL;
appearance.Layer2Font = new Font(BaseFont.CreateFont("C:/windows/fonts/arialuni.ttf", BaseFont.IDENTITY_H, BaseFont.EMBEDDED), 12);
// Creating the signature
IExternalSignature pks = new PrivateKeySignature(pk, digestAlgorithm);
MakeSignature.SignDetached(appearance, pks, chain, null, null, null, 0, subfilter);
}
public void Sign(String src, String name, String dest, ICollection <X509Certificate> chain, ICipherParameters pk,
String digestAlgorithm, CryptoStandard subfilter, String reason, String location,
PdfSignatureAppearance.RenderingMode renderingMode, Image image)
{
// Creating the reader and the stamper
PdfReader reader = new PdfReader(src);
FileStream os = new FileStream(dest, FileMode.Create);
PdfStamper stamper = PdfStamper.CreateSignature(reader, os, '\0');
// Creating the appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = reason;
appearance.Location = location;
appearance.SetVisibleSignature(name);
appearance.Layer2Text = "Signed on " + DateTime.Now;
appearance.SignatureRenderingMode = renderingMode;
appearance.SignatureGraphic = image;
// Creating the signature
IExternalSignature pks = new PrivateKeySignature(pk, digestAlgorithm);
MakeSignature.SignDetached(appearance, pks, chain, null, null, null, 0, subfilter);
}
/// <summary>
/// Signs a PDF document using iTextSharp library
/// </summary>
/// <param name="sourceDocument">The path of the source pdf document which is to be signed</param>
/// <param name="destinationDocument">The path at which the signed pdf document should be generated</param>
/// <param name="privateKeyStream">A Stream containing the private/public key in .pfx format which would be used to sign the document</param>
/// <param name="pfxKeyPass">The password for the private key</param>
/// <param name="reasonForSigning">String describing the reason for signing, would be embedded as part of the signature</param>
/// <param name="location">Location where the document was signed, would be embedded as part of the signature</param>
public static void SignPdfFile(string sourceDocument, string destinationDocument, SignInfo i)
{
using (var cpfxFile = new FileStream(i.pfxFilePath, FileMode.Open, FileAccess.Read))
{
Pkcs12Store pk12 = new Pkcs12Store(cpfxFile, i.pfxKeyPass.ToCharArray());
string alias = null;
foreach (string tAlias in pk12.Aliases)
{
if (pk12.IsKeyEntry(tAlias))
{
alias = tAlias;
break;
}
}
var pk = pk12.GetKey(alias).Key;
using (var reader = new PdfReader(sourceDocument))
using (var fout = new FileStream(destinationDocument, FileMode.Create, FileAccess.ReadWrite))
using (var stamper = PdfStamper.CreateSignature(reader, fout, '\0'))
{
stamper.SetEncryption(i.docPass, i.docPass, PdfWriter.ALLOW_SCREENREADERS, PdfWriter.STRENGTH128BITS);
var img = new iTextSharp.text.Jpeg(new Uri(i.signImagePath));
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Image = img;
appearance.Reason = i.reasonForSigning;
appearance.Location = i.location;
const float x = 20, y = 10;
appearance.SetVisibleSignature(new iTextSharp.text.Rectangle(x, y, x + img.Width, y + img.Width), 1, "Icsi-Vendor");
IExternalSignature es = new PrivateKeySignature(pk, "SHA-256");
MakeSignature.SignDetached(appearance, es,
new X509Certificate[] { pk12.GetCertificate(alias).Certificate }, null, null, null, 0, CryptoStandard.CMS);
stamper.Close();
}
}
}
/**
* 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);
}
/*public void Verify(string pdfFile, Stream fileStream)
* {
*
* //KeyStore kall = PdfPKCS7.loadCacertsKeyStore();
* var parser = new X509CertificateParser(fileStream);
* var certifi = parser.ReadCertificate ();
* fileStream.Dispose();
*
* string pathToFiles = HttpContext.Current.Server.MapPath("~/UploadFile/output/ForCekTandaTangan.pdf");
* PdfReader reader = new PdfReader(pathToFiles);
* AcroFields af = reader.AcroFields;
* var names = af.GetSignatureNames();
* if (names.Count == 0)
* {
* System.Diagnostics.Debug.WriteLine("Tidak ada ttdnya");
* }
* else
* {
* System.Diagnostics.Debug.WriteLine("IKI lo TTD ne yooow");
* }
* foreach (string name in names)
* {
* if (!af.SignatureCoversWholeDocument(name))
* {
* System.Diagnostics.Debug.WriteLine("The signature: {0} does not covers the whole document.", name);
* }
* System.Diagnostics.Debug.WriteLine("Signature Name: " + name);
* System.Diagnostics.Debug.WriteLine("Signature covers whole document: " + af.SignatureCoversWholeDocument(name));
* System.Diagnostics.Debug.WriteLine("Document revision: " + af.GetRevision(name));
*
* PdfPKCS7 pk = af.VerifySignature(name);
* var cal = pk.SignDate;
* var pkc = pk.Certificates;
* // TimeStampToken ts = pk.TimeStampToken;
* if (!pk.Verify())
* {
* System.Diagnostics.Debug.WriteLine("The signature could not be verified");
* } else
* {
* System.Diagnostics.Debug.WriteLine("Name signature: " + pk.SignName);
* System.Diagnostics.Debug.WriteLine("Reason signature: " + pk.Reason);
* System.Diagnostics.Debug.WriteLine("Location signature: " + pk.Location);
* System.Diagnostics.Debug.WriteLine("Date signature: " + pk.SignDate);
* System.Diagnostics.Debug.WriteLine("Version signature: " + pk.SigningInfoVersion);
* System.Diagnostics.Debug.WriteLine("Sertificate signature: " + pk.SigningCertificate);
* }
*
* //IList<VerificationException>[] fails = PdfPKCS7.VerifyCertificates(pkc, new X509Certificate[] { certifi }, null, cal);
* //Object[] fails = PdfPKCS7.VerifyCertificates(pkc, new X509Certificate[] { }, null, cal);
* //if (fails != null)
* //{
* // System.Diagnostics.Debug.WriteLine("The file is not signed using the specified key-pair.");
* //}
* }
* }*/
//To disable Multi signatures uncomment this line : every new signature will invalidate older ones ! line 251
//PdfStamper st = PdfStamper.CreateSignature(reader, new FileStream(this.outputPDF, FileMode.Create, FileAccess.Write), '\0');
public void Sign(string SigReason, string SigContact,
string SigLocation, string pic, bool visible, int posX, int posY)
{
//Activate MultiSignatures
PdfReader reader = new PdfReader(this.inputPDF);
PdfStamper st = PdfStamper.CreateSignature(reader,
new FileStream(this.outputPDF, FileMode.Create, FileAccess.Write),
'\0', null, true);
//iTextSharp.text.Image sigImg = iTextSharp.text.Image.GetInstance(pic);
Image sigImg = Image.GetInstance(pic);
// MAX_WIDTH, MAX_HEIGHT
sigImg.ScaleToFit(150, 50);
// Set signature position on page
sigImg.SetAbsolutePosition(posX, 840 - posY);
// Add signatures to desired page
PdfContentByte over = st.GetOverContent(1);
over.AddImage(sigImg);
st.MoreInfo = this.metadata.getMetaData();
st.XmpMetadata = this.metadata.getStreamedMetaData();
PdfSignatureAppearance sap = st.SignatureAppearance;
sap.SetCrypto(this.myCert.Akp, this.myCert.Chain,
null, PdfSignatureAppearance.WINCER_SIGNED);
sap.Reason = SigReason;
sap.Contact = SigContact;
sap.Location = SigLocation;
if (visible)
{
sap.SetVisibleSignature(
new Rectangle(posX, 840 - posY, posX + 150, (840 - posY) + 50), 1, null);
}
st.Close();
}
public void Sign(String src, String name, String dest, ICollection <X509Certificate> chain, ICipherParameters pk,
String digestAlgorithm, CryptoStandard subfilter, String reason, String location)
{
// Creating the reader and the stamper
PdfReader reader = new PdfReader(src);
FileStream os = new FileStream(dest, FileMode.Create);
PdfStamper stamper = PdfStamper.CreateSignature(reader, os, '\0');
// Creating the appearance
PdfSignatureAppearance appearance = stamper.SignatureAppearance;
appearance.Reason = reason;
appearance.Location = location;
appearance.SetVisibleSignature(name);
// Creating the appearance for layer 0
PdfTemplate n0 = appearance.GetLayer(0);
float x = n0.BoundingBox.Left;
float y = n0.BoundingBox.Bottom;
float width = n0.BoundingBox.Width;
float height = n0.BoundingBox.Height;
n0.SetColorFill(BaseColor.LIGHT_GRAY);
n0.Rectangle(x, y, width, height);
n0.Fill();
// Creating the appearance for layer 2
PdfTemplate n2 = appearance.GetLayer(2);
ColumnText ct = new ColumnText(n2);
ct.SetSimpleColumn(n2.BoundingBox);
Paragraph p = new Paragraph("This document was signed by Bruno Specimen.");
ct.AddElement(p);
ct.Go();
// Creating the signature
IExternalSignature pks = new PrivateKeySignature(pk, digestAlgorithm);
MakeSignature.SignDetached(appearance, pks, chain, null, null, null, 0, subfilter);
}
