//private Certificate _certificate;
internal Sig(Certificate certificate)
{
_dictionary = new PDFDictionary();
_dictionary.AddItem("Type", new PDFName("Sig"));
_dictionary.AddItem("Filter", new PDFName("Adobe.PPKMS"));
_dictionary.AddItem("SubFilter", new PDFName("adbe.pkcs7.sha1"));
//_dictionary.AddItem("Filter", new PDFName("Adobe.PPKLite"));
//_dictionary.AddItem("SubFilter", new PDFName("adbe.pkcs7.detached"));
_dictionary.AddItem("ByteRange", new PDFArray());
//_certificate = certificate;
PKCS7 pkcs = new PKCS7(certificate.Akp, certificate.Chain, null, "SHA1", true);
string name = PKCS7.GetSubjectFields(pkcs.SigningCertificate).GetField("CN");
_dictionary.AddItem("Name", new PDFString(System.Text.Encoding.Default.GetBytes(name), false));
byte[] buf = pkcs.GetEncodedPKCS7(null, DateTime.Now, /*null,*/ null);
byte[] digest = new byte[buf.Length /* + 64*/];
_dictionary.AddItem("Contents", new PDFString(digest, true));
}
public void WriteDigest()
{
PKCS7 pkcs = new PKCS7(_cert.Akp, _cert.Chain, null, "SHA1", true);
for (int i = 0; i < _byteRange.Length; i += 2)
{
byte[] buf = new byte[_byteRange[i + 1]];
_document.Position = _byteRange[i];
_document.Read(buf, 0, _byteRange[i + 1]);
pkcs.Update(buf, 0, buf.Length);
}
byte[] bsig = pkcs.GetEncodedPKCS7(null, DateTime.Now, null);
//byte[] sbuf = new byte[bsig.Length/* +64*/];
//Array.Copy(bsig, 0, sbuf, 0, bsig.Length);
// Записываем дайджест
//PDFString str = new PDFString(sbuf, true);
PDFString str = new PDFString(bsig, true);
SaveParameters sp = new SaveParameters(_document);
sp.Stream.Position = _byteRange[1];
str.Write(sp);
}