/// <summary>
/// Ritorna true se in un file PDF sono presenti delle firme pades
/// </summary>
/// <param name="fileDoc"></param>
/// <returns></returns>
public static bool IsPdfPades(DocsPaVO.documento.FileDocumento fileDoc)
{
try
{
int numSig = 0;
dpaItextSharp.text.pdf.PdfReader r = new dpaItextSharp.text.pdf.PdfReader(fileDoc.content);
dpaItextSharp.text.pdf.AcroFields af = r.AcroFields;
if (af != null)
{
numSig = af.GetSignatureNames().Count;
if (numSig > 0)
{
return(true);
}
}
return(false);
}
catch
{
return(false);
}
}
public static bool CheckNumSignature(DocsPaVO.documento.FileDocumento fileDoc)
{
bool result = true;
int numSign = 0;
try
{
if (fileDoc != null && fileDoc.signatureResult != null && fileDoc.signatureResult.PKCS7Documents != null)
{
numSign = fileDoc.signatureResult.PKCS7Documents.Count();
dpaItextSharp.text.pdf.PdfReader pdfReader = new dpaItextSharp.text.pdf.PdfReader(fileDoc.content);
PdfDictionary top = (PdfDictionary)PdfReader.GetPdfObjectRelease(pdfReader.Catalog.Get(PdfName.ACROFORM));
if (top == null)
{
return(true);
}
PdfArray arrfds = (PdfArray)PdfReader.GetPdfObjectRelease(top.Get(PdfName.FIELDS));
if (arrfds != null && arrfds.Size > numSign)
{
for (int i = 0; i < arrfds.Size; i++)
{
if (arrfds.ArrayList[i].GetType() == typeof(dpaItextSharp.text.pdf.PdfNull))
{
return(false);
}
}
}
}
}
catch (Exception e)
{
result = true;
}
return(result);
}
/// <summary>
///
/// </summary>
/// <param name="fileDoc"></param>
/// <returns></returns>
public static bool VerifyPadesSignature(DocsPaVO.documento.FileDocumento fileDoc)
{
SignedDocument si = new SignedDocument();
VerifyTimeStamp verifyTimeStamp = new VerifyTimeStamp();
string padesSignAlgorithm = null;
dpaItextSharp.text.pdf.PdfReader pdfReader = null;
try
{
pdfReader = new dpaItextSharp.text.pdf.PdfReader(fileDoc.content);
}
catch
{
return(false);
}
dpaItextSharp.text.pdf.AcroFields af = pdfReader.AcroFields;
List <string> signNames = af.GetSignatureNames().Cast <string>().ToList <string>();
if (signNames.Count == 0) //Firma non è presente
{
return(false);
}
List <DocsPaVO.documento.SignerInfo> siList = new List <DocsPaVO.documento.SignerInfo>();
bool verResult = true;
foreach (string name in signNames)
{
List <DocsPaVO.documento.TSInfo> tsLst = new List <DocsPaVO.documento.TSInfo>();
dpaItextSharp.text.pdf.PdfPKCS7 pk = af.VerifySignature(name);
try
{
padesSignAlgorithm = "PADES " + pk.GetHashAlgorithm();
}
catch (Exception exalg)
{
padesSignAlgorithm = "PADES : errore ricavando l'algo Hash:" + exalg.Message;
}
byte[] cert = pk.SigningCertificate.GetEncoded();
DocsPaVO.documento.SignerInfo sinfo = si.GetCertSignersInfo(cert);
sinfo.SignatureAlgorithm = padesSignAlgorithm;
sinfo.SigningTime = pk.SignDate;
if (verResult) //fino a che è true verifica
{
verResult = pk.Verify();
}
if (pk.TimeStampToken != null)
{
//Ricavo il certificato
ICollection certsColl = pk.TimeStampToken.GetCertificates("COLLECTION").GetMatches(null);
DocsPaVO.documento.TSInfo timeStamp = verifyTimeStamp.getTSCertInfo(certsColl);
timeStamp.TSdateTime = pk.TimeStampToken.TimeStampInfo.GenTime.ToLocalTime();
timeStamp.TSserialNumber = pk.TimeStampToken.TimeStampInfo.SerialNumber.ToString();
timeStamp.TSimprint = Convert.ToBase64String(pk.TimeStampToken.TimeStampInfo.TstInfo.MessageImprint.GetEncoded());
timeStamp.TSType = DocsPaVO.documento.TsType.PADES;
tsLst.Add(timeStamp);
}
if (tsLst.Count > 0)
{
sinfo.SignatureTimeStampInfo = tsLst.ToArray();
}
siList.Add(sinfo);
}
DocsPaVO.documento.VerifySignatureResult result = new DocsPaVO.documento.VerifySignatureResult();
if (verResult)
{
result.StatusCode = 0;
result.StatusDescription = "La Verifica OK, ma senza controllo CRL";
}
else
{
result.StatusCode = -1;
result.StatusDescription = "La Verifica di almeno un firmatario e Fallita";
}
List <DocsPaVO.documento.PKCS7Document> pkcsDocs = new List <DocsPaVO.documento.PKCS7Document>();
if ((fileDoc.signatureResult != null) && (fileDoc.signatureResult.PKCS7Documents != null) && (fileDoc.signatureResult.PKCS7Documents.Length > 0))
{
foreach (DocsPaVO.documento.PKCS7Document docs in fileDoc.signatureResult.PKCS7Documents)
{
pkcsDocs.Add(docs);
}
}
pkcsDocs.Add(new DocsPaVO.documento.PKCS7Document {
SignersInfo = siList.ToArray(), SignAlgorithm = padesSignAlgorithm, DocumentFileName = fileDoc.nomeOriginale, SignHash = "Non Disponibile per la firma PADES", SignatureType = DocsPaVO.documento.SignType.PADES
});
result.PKCS7Documents = pkcsDocs.ToArray();
result.FinalDocumentName = fileDoc.name;
fileDoc.signatureResult = result;
return(false);
}
