private static void VerificaValiditaTemporaleCertificato(EsitoVerifica ev, DateTime?dataverificaDT, Org.BouncyCastle.X509.X509Certificate certificate, string SignAlgorithm)
{
//certificato scaduto
if (certificate.NotAfter.ToLocalTime() < dataverificaDT.Value)
{
logger.DebugFormat("Expired Certificate {0} > Expiry Date [{1}]", dataverificaDT.Value, certificate.NotAfter.ToLocalTime());
ev.status = EsitoVerificaStatus.NotTimeValid;
ev.errorCode = "1407";
}
//certificato ancora non valido
if (certificate.NotBefore.ToLocalTime() > dataverificaDT.Value)
{
logger.DebugFormat("Not yet valid Certificate {0} > Start Date[{1}]", dataverificaDT.Value, certificate.NotBefore.ToLocalTime());
ev.status = EsitoVerificaStatus.NotTimeValid;
ev.errorCode = "1426";
}
if (SignAlgorithm.ToLower().Contains("sha1") ||
SignAlgorithm.ToLower().Contains("sha-1")
)
{
//dal 30 11 2011 lo sha1 non è piu conforme alla normativa
if (dataverificaDT.Value > DateTime.Parse("2011-07-01T00:00:00+00:00"))
{
logger.Debug("Sha-1 used AFTER 2011-06-30");
ev.status = EsitoVerificaStatus.SHA1NonSupportato;
ev.errorCode = "1468";
}
}
}
private static bool VerificaNonRepudiation(EsitoVerifica ev, bool fileOK, Org.BouncyCastle.X509.X509Certificate cert1)
{
/*
* digitalSignature (0),
* nonRepudiation (1),
* keyEncipherment (2),
* dataEncipherment (3),
* keyAgreement (4),
* keyCertSign (5),
* cRLSign (6),
* encipherOnly (7),
* decipherOnly (8)
*/
try
{
bool[] keyUsageBA = cert1.GetKeyUsage();
if (!keyUsageBA[1]) // Manca la no repudiation non va bene per i file firmati!!!
{
fileOK = false;
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.message = "La chiave certificata non e abilitata alla firma";
ev.errorCode = "1409";
}
}
catch
{
}
return(fileOK);
}
public CertificateInfo GetCertificateInfoFromEv(EsitoVerifica ev)
{
//grande assunto
try
{
return(ev.VerifySignatureResult.PKCS7Documents[0].SignersInfo[0].CertificateInfo);
}
catch
{
return(new CertificateInfo());
}
}
public EsitoVerifica VerificaByteEV(byte[] fileContents, string endPoint, Object[] args)
{
EsitoVerifica ev = new EsitoVerifica();
string dataVerificaString = string.Empty;
DateTime?dataverificaDT;
if (args.Length > 0)
{
dataverificaDT = args[0] as DateTime?;
if (dataverificaDT == null)
{
dataVerificaString = args[0] as string;
if (dataVerificaString == null)
{
ev.status = EsitoVerificaStatus.ErroreGenerico;
return(ev);
}
}
else
{
dataVerificaString = zeniDateConverter(dataverificaDT);
}
}
ev.message = "Certificato del Firmatario revocato";
ev.errorCode = "1408";
ev.SubjectDN = "12202828:4330:1";
ev.SubjectCN = "ELIO RAFFAELE OTTAVIANO";
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.status = EsitoVerificaStatus.Revoked;
ev.dataRevocaCertificato = DateTime.Parse("2011-01-21T12:48:17+01:00");
//TEST!!!!
ev.content = null;
ev.VerifySignatureResult = ConvertToVerifySignatureResult(ev.status);;
return(ev);
}
private DocsPaVO.documento.Internal.SignerInfo ControlloCRL(bool forceDownload, EsitoVerifica ev, string cachePath, X509Certificate cert, DocsPaVO.documento.Internal.SignerInfo si)
{
//il controllo CRL lo facciamo alla fine.. dato che è dispendioso
if (ev.status == EsitoVerificaStatus.Valid)
{
EsitoVerifica evCrl = controllaCrlCert(cert, cachePath, forceDownload);
si.CertificateInfo.RevocationStatus = (int)evCrl.status;
si.CertificateInfo.RevocationStatusDescription = evCrl.status.ToString();
if (evCrl.dataRevocaCertificato != null)
{
si.CertificateInfo.RevocationDate = evCrl.dataRevocaCertificato.Value;
ev.dataRevocaCertificato = evCrl.dataRevocaCertificato;
}
if (evCrl.status != EsitoVerificaStatus.Valid)
{
ev.status = evCrl.status;
ev.message = evCrl.message;
ev.errorCode = evCrl.errorCode;
}
}
return(si);
}
private static bool VerificaCertificato(EsitoVerifica ev, SignerInformation signer, bool fileOK, Org.BouncyCastle.X509.X509Certificate cert1)
{
fileOK = signer.Verify(cert1);
if (signer.SignedAttributes != null)
{
if (signer.SignedAttributes[Org.BouncyCastle.Asn1.Pkcs.PkcsObjectIdentifiers.IdAASigningCertificateV2] == null)
{
fileOK = false;
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.message = "Il formato dell'attributo signingCertificateV2 non è presente";
ev.errorCode = "145C";
}
}
else
{
fileOK = false;
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.message = "Mancano le signed Attributes obbligatorie( IdAAsigningCertificateV2, MessageDigest, contentType )";
ev.errorCode = "1450";
}
return(fileOK);
}
/// <summary>
/// Verifica singolo Certificato
/// </summary>
/// <param name="CertificateDer">Bytearray del certificato x509</param>
/// <param name="CertificateCAPEM">non usato</param>
/// <param name="args">parametri di oggetti opzionali</param>
/// <returns>Ritorna lo status della verifica.</returns>
public EsitoVerifica VerificaCertificato(byte[] CertificateDer, byte[] CertificateCAPEM, Object[] args)
{
EsitoVerifica retval = null;
string cachePath;
bool forceDownload = false;
if (args.Length > 0)
{
cachePath = args[1] as string;
string fdl = args[2] as string;
if (!String.IsNullOrEmpty(fdl))
{
Boolean.TryParse(fdl, out forceDownload);
}
//funzioni bouncycastle per estrapolare il certificato dal binario
X509CertificateParser cp = new X509CertificateParser();
X509Certificate cert = cp.ReadCertificate(CertificateDer);
List <DocsPaVO.documento.Internal.SignerInfo> retSI = new List <DocsPaVO.documento.Internal.SignerInfo>();
List <PKCS7Document> p7doc = new List <PKCS7Document>();
retSI.Add(GetCertSignersInfo(cert));
p7doc.Add(new PKCS7Document {
SignersInfo = retSI.ToArray()
});
//Questo scarica la CRL e fa la verifica.
retval = controllaCrlCert(cert, cachePath, forceDownload);
int statusInt = (int)retval.status;
retval.VerifySignatureResult = new VerifySignatureResult {
StatusCode = statusInt, PKCS7Documents = p7doc.ToArray()
};
}
return(retval);
}
/// <summary>
/// Verifiy of CRL
/// </summary>
/// <param name="fileContents">byte Array file contents</param>
/// <param name="endPoint">not used </param>
/// <param name="args">1) Datetime? data verifica / string cachePath / string (bool) nocache</param>
/// <returns></returns>
public EsitoVerifica VerificaByteEV(byte[] fileContents, string endPoint, Object[] args)
{
//string ID = String.Format("{0}-{1}", Environment.GetEnvironmentVariable("APP_POOL_ID").Replace(" ", ""), AppDomain.CurrentDomain.BaseDirectory);
bool forceDownload = false;
//end point lo usiamo per forzare il download
string p7mSignAlgorithm = null;
//string p7mSignHash = null;
DocsPaVO.documento.Internal.SignerInfo[] certSignersInfo;
EsitoVerifica ev = new EsitoVerifica();
DateTime?dataverificaDT = null;
string cachePath = string.Empty;
if (args == null)
{
logger.Debug("Args (Date) is null, settign current");
dataverificaDT = DateTime.Now;
}
if (args.Length > 0)
{
dataverificaDT = args[0] as DateTime?;
if (dataverificaDT == null)
{
logger.Debug("Date is null, settign current");
dataverificaDT = DateTime.Now;
}
cachePath = args[1] as string;
string fdl = args[2] as string;
if (!String.IsNullOrEmpty(fdl))
{
Boolean.TryParse(endPoint, out forceDownload);
}
}
int posi = IndexOfInArray(fileContents, System.Text.ASCIIEncoding.ASCII.GetBytes("Mime-Version:"));
if (posi == 0) //E' un mime m7m
{
using (MemoryStream ms = new MemoryStream(fileContents))
{
anmar.SharpMimeTools.SharpMessage sm = new anmar.SharpMimeTools.SharpMessage(ms);
if (sm.Attachments.Count > 0)
{
foreach (anmar.SharpMimeTools.SharpAttachment att in sm.Attachments)
{
if (System.IO.Path.GetExtension(att.Name).ToLower().Contains("p7m"))
{
att.Stream.Position = 0;
BinaryReader sr = new BinaryReader(att.Stream);
fileContents = sr.ReadBytes((int)att.Size);
}
}
}
}
}
// Ce provo....
posi = -1;
posi = IndexOfInArray(fileContents, System.Text.ASCIIEncoding.ASCII.GetBytes("%PDF"));
if (posi == 0) //E' un pdf
{
PdfReader pdfReader = isPdf(fileContents);
try
{
AcroFields af = pdfReader.AcroFields;
List <string> signNames = af.GetSignatureNames();
if (signNames.Count == 0) //Firma non è presente
{
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.message = "Il file PDF da verificare non contiene nessuna firma";
ev.errorCode = "1458";
return(ev);
}
List <DocsPaVO.documento.Internal.SignerInfo> siList = new List <DocsPaVO.documento.Internal.SignerInfo>();
foreach (string name in signNames)
{
PdfPKCS7 pk = af.VerifySignature(name);
p7mSignAlgorithm = pk.GetHashAlgorithm();
Org.BouncyCastle.X509.X509Certificate[] certs = pk.Certificates;
foreach (X509Certificate cert in certs)
{
DocsPaVO.documento.Internal.SignerInfo si = GetCertSignersInfo(cert);
VerificaValiditaTemporaleCertificato(ev, dataverificaDT, cert, p7mSignAlgorithm);
si = ControlloCRL(forceDownload, ev, cachePath, cert, si);
siList.Add(si);
}
bool result = pk.Verify();
if (!result)
{
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.message = "La verifica della firma è fallita (File is Tampered)";
ev.errorCode = "1450";
}
}
/*
* if (
* (pdfReader.PdfVersion.ToString() != "4")||
* (pdfReader.PdfVersion.ToString() != "7"))
* {
* ev.status = EsitoVerificaStatus.ErroreGenerico;
* ev.message = "Il file da verificare non è conforme allo standard PDF 1.4 o pdf 1.7";
* ev.errorCode = "1457";
* }
*/
List <DocsPaVO.documento.Internal.PKCS7Document> p7docsLst = new List <DocsPaVO.documento.Internal.PKCS7Document>();
DocsPaVO.documento.Internal.PKCS7Document p7doc = new DocsPaVO.documento.Internal.PKCS7Document
{
SignersInfo = siList.ToArray(),
DocumentFileName = null,
Level = 0
};
p7docsLst.Add(p7doc);
ev.VerifySignatureResult = ConvertToVerifySignatureResult(ev.status, p7docsLst.ToArray());
ev.content = fileContents;
}
catch (Exception e)
{
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.message = "Error verifying pdf message :" + e.Message;
ev.errorCode = "1402";
return(ev);
}
}
else //PKCS7
{
try
{
int doclevel = 0;
List <DocsPaVO.documento.Internal.PKCS7Document> p7docsLst = new List <DocsPaVO.documento.Internal.PKCS7Document>();
do
{
//questa Estrazione serve solo per capire se uscire dal ciclo ricorsivo e ritornare il content
try
{
ev.content = extractSignedContent(fileContents);
}
catch
{
break;
}
//Ciclo per file firmato
Asn1Sequence sequenza = Asn1Sequence.GetInstance(fileContents);
DerObjectIdentifier tsdOIDFile = sequenza[0] as DerObjectIdentifier;
if (tsdOIDFile != null)
{
if (tsdOIDFile.Id == CmsObjectIdentifiers.timestampedData.Id) //TSD
{
logger.Debug("Found TSD file");
DerTaggedObject taggedObject = sequenza[1] as DerTaggedObject;
if (taggedObject != null)
{
Asn1Sequence asn1seq = Asn1Sequence.GetInstance(taggedObject, true);
TimeStampedData tsd = TimeStampedData.GetInstance(asn1seq);
fileContents = tsd.Content.GetOctets();
}
}
if (tsdOIDFile.Id == CmsObjectIdentifiers.SignedData.Id) //p7m
{
logger.Debug("Found P7M file");
}
}
CmsSignedData cms = new CmsSignedData(fileContents);
//controllaCrlFileP7m(cms);
IX509Store store = cms.GetCertificates("Collection");
SignerInformationStore signers = cms.GetSignerInfos();
SignedData da = SignedData.GetInstance(cms.ContentInfo.Content.ToAsn1Object());
Asn1Sequence DigAlgAsn1 = null;
if (da.DigestAlgorithms.Count > 0)
{
DigAlgAsn1 = da.DigestAlgorithms[0].ToAsn1Object() as Asn1Sequence;
}
if (DigAlgAsn1 != null)
{
p7mSignAlgorithm = Org.BouncyCastle.Security.DigestUtilities.GetAlgorithmName(AlgorithmIdentifier.GetInstance(DigAlgAsn1).ObjectID);
}
certSignersInfo = new DocsPaVO.documento.Internal.SignerInfo[signers.GetSigners().Count];
int i = 0;
foreach (SignerInformation signer in signers.GetSigners())
{
bool fileOK = false;
Org.BouncyCastle.X509.X509Certificate cert1 = GetCertificate(signer, store);
certSignersInfo[i] = GetCertSignersInfo(cert1);
VerificaValiditaTemporaleCertificato(ev, dataverificaDT, cert1, p7mSignAlgorithm);
fileOK = VerificaNonRepudiation(ev, fileOK, cert1);
if (!fileOK)
{
certSignersInfo[i].CertificateInfo.messages = ev.errorCode + " " + ev.message;
}
try
{
fileOK = VerificaCertificato(ev, signer, fileOK, cert1);
}
catch (Exception e)
{
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.message = "Error verifying 2, message :" + e.Message;
ev.errorCode = "1450";
}
if (fileOK)
{
certSignersInfo[i] = ControlloCRL(forceDownload, ev, cachePath, cert1, certSignersInfo[i]);
}
//p7mSignHash = BitConverter.ToString(Org.BouncyCastle.Security.DigestUtilities.CalculateDigest(Org.BouncyCastle.Security.DigestUtilities.GetAlgorithmName(AlgorithmIdentifier.GetInstance(DigAlgAsn1).ObjectID), (byte[])cms.SignedContent.GetContent())).Replace("-", "");
}
/*
* if (cms.SignedContent != null)
* {
* //CmsProcessable signedContent = cms.SignedContent;
* //ev.content = (byte[])signedContent.GetContent();
*
* ev.content = extractMatrioskaFile(fileContents);
*
*
*
* }
*/
DocsPaVO.documento.Internal.PKCS7Document p7doc = new DocsPaVO.documento.Internal.PKCS7Document
{
SignersInfo = certSignersInfo,
DocumentFileName = null,
Level = doclevel++
};
p7docsLst.Add(p7doc);
try
{
fileContents = extractSignedContent(fileContents);
}
catch
{
break;
}
} while (true);
ev.VerifySignatureResult = ConvertToVerifySignatureResult(ev.status, p7docsLst.ToArray());;
}
catch (Exception e)
{
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.message = "Error verifying 1, message :" + e.Message;
ev.errorCode = "1402";
return(ev);
}
}
return(ev);
}
EsitoVerifica controllaCrlCert(X509Certificate cert, string cachePath, bool force = false)
{
//usiamo l'ev solo per i dati di revoca
EsitoVerifica ev = new EsitoVerifica();
string CN = cert.SubjectDN.GetValues(X509Name.CN).Cast <string>().FirstOrDefault();
string SN = cert.SubjectDN.GetValues(X509Name.SerialNumber).Cast <string>().FirstOrDefault();
X509Extensions ex = X509Extensions.GetInstance(cert.CertificateStructure.TbsCertificate.Extensions);
X509Extension e = ex.GetExtension(X509Extensions.CrlDistributionPoints);
if (e == null)
{
string msg = "CRL distribution points NOT PRESENT in certificate structure";
logger.Debug(msg);
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.errorCode = "1411";//nonposso scaricare la CRL
ev.message = msg;
return(ev);
}
var crldp = CrlDistPoint.GetInstance(e.GetParsedValue());
List <String> certDpUrlLst = GetCrlDistribtionPoints(crldp);
ev.status = EsitoVerificaStatus.Valid;
ev.SubjectCN = CN;
ev.SubjectDN = SN;
int downloadsTrials = 0;
List <String> errorLst = new List <string>();
foreach (string url in certDpUrlLst)
{
try
{
Uri tryUri = new Uri(url);
}
catch
{
logger.ErrorFormat("Unable to download/process CRL URL : {0}", url);
continue;
}
try
{
X509Crl rootCrl = retreiveCrlUrl(url, cachePath, force);
downloadsTrials++;
if (rootCrl.IsRevoked(cert))
{
X509CrlEntry entry = rootCrl.GetRevokedCertificate(cert.CertificateStructure.SerialNumber.Value);
ev.dataRevocaCertificato = entry.RevocationDate;
logger.DebugFormat("Certificate {0} : {1} with serial {2} is Revoked on {3}", CN, SN, BitConverter.ToString(entry.SerialNumber.ToByteArray()), ev.dataRevocaCertificato);
ev.content = entry.SerialNumber.ToByteArray();
ev.errorCode = "1408";
ev.status = EsitoVerificaStatus.Revoked;
break;
}
}
catch (Exception exc)
{
logger.ErrorFormat("Unable to download/process CRL message {0} stack {1} on Download Trial {2}", exc.Message, exc.StackTrace, downloadsTrials);
errorLst.Add(exc.Message);
}
}
string ErrorMessage = string.Empty;
if ((errorLst.Count > 0) && downloadsTrials == 0)
{
foreach (string s in errorLst)
{
ErrorMessage += s + " | ";
}
}
if (!string.IsNullOrEmpty(ErrorMessage))
{
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.errorCode = "1411";//nonposso scaricare la CRL
ev.message = "Unable to download/process CRL message:" + ErrorMessage;
}
return(ev);
}
public EsitoVerifica VerificaByteEV(byte[] fileContents, string endPoint, Object[] args)
{
EsitoVerifica ev = new EsitoVerifica();
string dataVerificaString = string.Empty;
DateTime?dataverificaDT;
if (args.Length > 0)
{
dataverificaDT = args[0] as DateTime?;
if (dataverificaDT == null)
{
dataVerificaString = args[0] as string;
if (dataVerificaString == null)
{
ev.status = EsitoVerificaStatus.ErroreGenerico;
return(ev);
}
}
else
{
dataVerificaString = zeniDateConverter(dataverificaDT);
}
}
System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Ssl3;
FirmaDigitale.FirmaDigitalePortTypeClient client = createClient(endPoint);
FirmaDigitale.DocumentoType doc = new FirmaDigitale.DocumentoType();
FirmaDigitale.DettaglioFirmaDigitaleType ret = null;
try
{
sbyte?arg1 = 0;
sbyte?arg2 = 0;
sbyte?arg3 = 1;
ret = client.VerificaFirma(fileContents, arg1, arg2, dataVerificaString, arg3, out doc);
ev.status = EsitoVerificaStatus.Valid;
ev.content = doc.fileOriginale;
if (ret != null)
{
ev.VerifySignatureResult = ConvertToVerifySignatureResult(ev.status, ret);
}
;
return(ev);
}
catch (FaultException <FirmaDigitale.FaultType> f)
{
ev.status = EsitoVerificaStatus.ErroreGenerico;
ev.message = f.Detail.userMessage;
ev.errorCode = f.Detail.errorCode;
return(ev);
}
catch (FaultException <FirmaDigitale.WarningResponseType> w)
{
List <string> lstW = new List <string> ();
foreach (FirmaDigitale.WarningType s in w.Detail.WarinigFault)
{
lstW.Add(Utils.SerializeObject <FirmaDigitale.WarningType>(s));
ev.message = s.errorMsg;
ev.errorCode = s.errorCode;
ev.SubjectDN = s.SubjectDN;
ev.SubjectCN = s.SubjectCN;
ev.status = EsitoVerificaStatus.ErroreGenerico;
if (s.errorCode == "1468")
{
ev.status = EsitoVerificaStatus.SHA1NonSupportato;
}
if (s.errorCode == "1407") // check
{
ev.status = EsitoVerificaStatus.NotTimeValid;
}
if (s.errorCode == "1408") // check
{
ev.status = EsitoVerificaStatus.Revoked;
foreach (FirmaDigitale.FirmatarioType ft in w.Detail.DettaglioFirmaDigitale.datiFirmatari)
{
if (ft.firmatario.dataRevocaCertificato != DateTime.MinValue)
{
ev.dataRevocaCertificato = ft.firmatario.dataRevocaCertificato;
}
}
}
}
//TEST!!!!
FirmaDigitale.DettaglioFirmaDigitaleType d = w.Detail.DettaglioFirmaDigitale;
ev.content = w.Detail.Documento.fileOriginale;
ev.VerifySignatureResult = ConvertToVerifySignatureResult(ev.status, d);;
ev.additionalData = lstW.ToArray();
return(ev);
}
}