/// <summary>
/// Valida arquivos Office geral
/// </summary>
/// <param name="filePath">Caminho do arquivo a ser validado</param>
/// <param name="format">Formato do documento a ser validado</param>
/// <param name="onlyRoot">
/// Determina se irá considerar apenas certificados de Autoridades Certificadoras.
/// True: Considera apenas certificados de Autoridades Certificadoras.
/// False: Considera todos os certificados instalados na máquina.
/// Default: True.
/// </param>
/// <returns>Lista de assinaturas, válidas ou não</returns>
internal static SignatureList validate(string filePath, FileFormat format, bool onlyRoot = true)
{
try
{
// list to return
SignatureList list = new SignatureList();
// open the file
Package package;
try
{
package = Package.Open(filePath, FileMode.Open, FileAccess.Read);
}
catch (NullReferenceException e)
{
throw new NullReferenceException(e.Message, e.InnerException);
}
// get the signatures
PackageDigitalSignatureManager _dsm = new PackageDigitalSignatureManager(package);
_dsm.CertificateOption = CertificateEmbeddingOption.InSignaturePart;
// if no signatures found
if (_dsm.Signatures == null || _dsm.Signatures.Count == 0)
{
throw new NoSignatureFoundException();
}
// verify all the signatures
foreach (PackageDigitalSignature signature in _dsm.Signatures)
{
list.Add
(
new Signature
(
filePath, // file path
format, // file format
getObjective(signature.Signature.GetXml().OuterXml), // objective
getSubject(signature.Signer.Subject), // subject
signature.SigningTime, // date time
validateCertificate((X509Certificate2)signature.Signer, true), // validate the certificate
getCertificates((X509Certificate2)signature.Signer, true) // certificate
)
{
SX509Certificate = (X509Certificate2)signature.Signer,
SFileProperties = getFileProperties(package.PackageProperties)
}
);
}
// close the file
package.Close();
return(list);
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// Faz a conversão entre List<Signture> e SignatureList
/// </summary>
/// <param name="from"></param>
/// <returns></returns>
private static SignatureList fromList(List <Signature> from)
{
SignatureList ret = new SignatureList();
foreach (Signature item in from)
{
ret.Add(item);
}
return(ret);
}
/// <summary>
/// Valida arquivos XPS
/// </summary>
/// <param name="filePath">Caminho do arquivo a ser validado</param>
/// <param name="onlyRoot">
/// Determina se irá considerar apenas certificados de Autoridades Certificadoras.
/// True: Considera apenas certificados de Autoridades Certificadoras.
/// False: Considera todos os certificados instalados na máquina.
/// Default: True.
/// </param>
/// <returns>Lista de assinaturas, válidas ou não</returns>
internal static SignatureList validateXps(string filePath, bool onlyRoot = true)
{
SignatureList list = new SignatureList();
// open the file
XpsDocument xpsDocument = new XpsDocument(filePath, FileAccess.Read);
if (xpsDocument.Signatures == null || xpsDocument.Signatures.Count == 0)
{
throw new NoSignatureFoundException();
}
foreach (XpsDigitalSignature digitalSignature in xpsDocument.Signatures)
{
list.Add
(
new Signature
(
filePath,
FileFormat.XpsDocument,
null,
getSubject(digitalSignature.SignerCertificate.Subject),
digitalSignature.SigningTime,
digitalSignature.VerifyCertificate() == X509ChainStatusFlags.NoError,
getCertificates((X509Certificate2)digitalSignature.SignerCertificate, true)
)
{
SX509Certificate = (X509Certificate2)digitalSignature.SignerCertificate,
SFileProperties = getFileProperties(xpsDocument.CoreDocumentProperties)
}
);
}
xpsDocument.Close();
return(list);
}
/// <summary>
/// Valida arquivos PDF
/// </summary>
/// <param name="filePath">Caminho do arquivo a ser validado</param>
/// <param name="onlyRoot">
/// Determina se irá considerar apenas certificados de Autoridades Certificadoras.
/// True: Considera apenas certificados de Autoridades Certificadoras.
/// False: Considera todos os certificados instalados na máquina.
/// Default: True.
/// </param>
/// <returns>Lista de assinaturas, válidas ou não</returns>
internal static SignatureList validate(string filePath, bool onlyRoot = true)
{
try
{
#region [obsolete code]
/*
*
* // list of valid certificates
* List<BCX.X509Certificate> kall = new List<BCX.X509Certificate>();
*
* // get the root certificates
* getSystemCertificates(StoreName.Root, StoreLocation.CurrentUser, ref kall);
*
* // if not only root, get others certificates
* if (!onlyRoot)
* {
* getSystemCertificates(StoreName.AddressBook, StoreLocation.CurrentUser, ref kall);
* getSystemCertificates(StoreName.AuthRoot, StoreLocation.CurrentUser, ref kall);
* getSystemCertificates(StoreName.CertificateAuthority, StoreLocation.CurrentUser, ref kall);
* getSystemCertificates(StoreName.My, StoreLocation.CurrentUser, ref kall);
* getSystemCertificates(StoreName.TrustedPeople, StoreLocation.CurrentUser, ref kall);
* getSystemCertificates(StoreName.TrustedPublisher, StoreLocation.CurrentUser, ref kall);
* }
* */
#endregion
// open the pdf file
TS.PdfReader reader = new TS.PdfReader(filePath);
// get the fields inside the file
TS.AcroFields af = reader.AcroFields;
// get the signatures
List <string> names = af.GetSignatureNames();
// if don't found signature
if (names == null || names.Count == 0)
{
throw new NoSignatureFoundException();
}
// signatures to return
SignatureList signatures = new SignatureList();
// for each signature in pdf file
foreach (string name in names)
{
// verify the signature
TSS.PdfPKCS7 pk = af.VerifySignature(name);
// get the datetime of signature
DateTime cal = pk.SignDate;
cal = (pk.TimeStampToken != null ? pk.TimeStampDate : cal);
// create the signature
Signature sig = new Signature
(
filePath, // file path
FileFormat.PDFDocument, // pdf format
pk.Reason, // objective
getSubject(pk.SigningCertificate.SubjectDN), // subject
cal, // date time
//verifySignature(pk.SignCertificateChain, kall, cal, pk.SigningCertificate), // signature validate, obsolete
verifySignature(pk.SigningCertificate),
getSignatureCertificates(pk.SignCertificateChain) // get the certificates
);
// set the x509certificates
sig.SX509Certificate = convertCertificate(pk.SigningCertificate);
// set the issuer
sig.SIssuer = pk.SigningCertificate.IssuerDN.ToString();
// set the file properties
foreach (KeyValuePair <string, string> prop in reader.Info)
{
FileProperties?fp = null;
try
{
fp = (FileProperties)Enum.Parse(typeof(FileProperties), prop.Key, true);
}
catch { }
if (fp.HasValue)
{
sig.addProperties(fp.Value, prop.Value);
}
}
// add signature to the list
signatures.Add(sig);
}
return(signatures);
}
catch (Exception ex)
{
throw ex;
}
}