public static void Main()
{
// NOTE:
// When used in trial mode, the library imposes some restrictions.
// Please visit http://bitmiracle.com/pdf-library/trial-restrictions.aspx
// for more information.
StringBuilder sb = new StringBuilder();
using (PdfDocument pdf = new PdfDocument(@"..\Sample Data\signed.pdf"))
{
PdfControl field = pdf.GetControls().FirstOrDefault(c => c.Type == PdfWidgetType.Signature);
if (field == null)
{
Console.WriteLine("Document does not contain signature fields");
return;
}
PdfSignature signature = ((PdfSignatureField)field).Signature;
PdfSignatureContents contents = signature.Contents;
sb.AppendFormat("Signed part is intact: {0}\n", contents.VerifyDigest());
DateTime signingTime = signature.SigningTime ?? DateTime.MinValue;
sb.AppendFormat("Signed on: {0}\n", signingTime.ToShortDateString());
var timestampToken = contents.GetTimestampToken();
if (timestampToken != null)
{
sb.AppendFormat("Embedded timestamp: {0}\n", timestampToken.GenerationTime);
if (timestampToken.TimestampAuthority != null)
{
sb.AppendFormat("Timestamp authority: {0}\n", timestampToken.TimestampAuthority.Name);
}
sb.AppendFormat("Timestamp is intact: {0}\n\n", contents.VerifyTimestamp());
}
else
{
sb.AppendLine();
}
if (contents.CheckHasEmbeddedOcsp())
{
sb.AppendLine("Signature has OCSP embedded.");
checkRevocation(signature, sb, PdfCertificateRevocationCheckMode.EmbeddedOcsp);
}
if (contents.CheckHasEmbeddedCrl())
{
sb.AppendLine("Signature has CRL embedded.");
checkRevocation(signature, sb, PdfCertificateRevocationCheckMode.EmbeddedCrl);
}
checkRevocation(signature, sb, PdfCertificateRevocationCheckMode.OnlineOcsp);
checkRevocation(signature, sb, PdfCertificateRevocationCheckMode.OnlineCrl);
}
Console.WriteLine(sb.ToString());
}
public static void Main()
{
// NOTE:
// When used in trial mode, the library imposes some restrictions.
// Please visit http://bitmiracle.com/pdf-library/trial-restrictions.aspx
// for more information.
StringBuilder sb = new StringBuilder();
using (PdfDocument pdf = new PdfDocument(@"..\Sample Data\signed.pdf"))
{
PdfControl control = pdf.GetControls().FirstOrDefault(c => c.Type == PdfWidgetType.Signature);
if (control == null)
{
Console.WriteLine("Document does not contain signature fields");
return;
}
PdfSignatureField field = (PdfSignatureField)control;
sb.AppendFormat("Signature field is invisible: {0}\n", isInvisible(field));
PdfSignature signature = field.Signature;
sb.AppendFormat("Signed by: {0}\n", signature.Name);
sb.AppendFormat("Signing time: {0}\n", signature.SigningTime);
sb.AppendFormat("Signed at: {0}\n", signature.Location);
sb.AppendFormat("Reason for signing: {0}\n", signature.Reason);
sb.AppendFormat("Signer's contact: {0}\n", signature.ContactInfo);
PdfSignatureContents contents = signature.Contents;
sb.AppendFormat("Has OCSP embedded: {0}\n", contents.CheckHasEmbeddedOcsp());
sb.AppendFormat("Has CRL embedded: {0}\n", contents.CheckHasEmbeddedCrl());
PdfSignatureCertificate certificate = contents.GetSigningCertificate();
sb.AppendLine();
sb.AppendLine("== Signing certificate:");
sb.AppendFormat("Name: {0}\n", certificate.Name);
sb.AppendFormat("Algorithm: {0}\n", certificate.AlgorithmName);
sb.AppendFormat("Subject DN: {0}\n", certificate.Subject.Name);
sb.AppendFormat("Issuer DN: {0}\n", certificate.Issuer.Name);
sb.AppendFormat("Serial number: {0}\n", certificate.SerialNumber);
sb.AppendFormat("Valid from {0} up to {1}\n", certificate.ValidFrom, certificate.ValidUpto);
sb.AppendFormat("Timestamp Authority URL: {0}\n", certificate.GetTimestampAuthorityUrl());
PdfSignatureCertificate issuer = contents.GetIssuerCertificateFor(certificate);
sb.AppendLine();
sb.AppendLine("== Issuer certificate:");
sb.AppendFormat("Subject DN: {0}\n", issuer.Subject.Name);
sb.AppendFormat("Issuer DN: {0}\n", issuer.Issuer.Name);
sb.AppendFormat("Serial number: {0}\n", issuer.SerialNumber);
}
Console.WriteLine(sb.ToString());
}
private static void checkRevocation(PdfSignature signature, StringBuilder sb, PdfCertificateRevocationCheckMode mode)
{
PdfSignatureContents contents = signature.Contents;
DateTime signingTime = signature.SigningTime ?? DateTime.MinValue;
foreach (DateTime time in new DateTime[] { signingTime, DateTime.UtcNow })
{
bool revoked = contents.CheckIfRevoked(mode, time);
string status = revoked ? "Revoked" : "Valid";
string date = time.ToShortDateString();
sb.AppendFormat("Checking using {0} mode: {1} on {2}\n", mode, status, date);
}
sb.AppendLine();
}
