public override byte[] Sign(Stream data)
{
SHA256 sha = new SHA256CryptoServiceProvider();
String hashAlgorithm = DigestAlgorithms.SHA256;
Hash = DigestAlgorithms.Digest(data, DigestAlgorithms.GetMessageDigest(hashAlgorithm));
return new byte[0];
}
public byte[] Sign(Stream data)
{
BasicOcspResp basicResp = (BasicOcspResp)ocspResp.GetResponseObject();
byte[] oc = basicResp.GetEncoded();
Collection <byte[]> ocspCollection = new Collection <byte[]>();
ocspCollection.Add(oc);
String hashAlgorithm = "SHA256";
PdfPKCS7 sgn = new PdfPKCS7(null, chain, hashAlgorithm, false);
byte[] hash = DigestAlgorithms.Digest(data, DigestAlgorithms.GetMessageDigest(hashAlgorithm));
byte[] sh = sgn.GetAuthenticatedAttributeBytes(hash, PdfSigner.CryptoStandard.CADES, ocspCollection,
null);
//create sha256 message digest
using (SHA256 sha256 = SHA256.Create()) {
sh = sha256.ComputeHash(sh);
}
//create hex encoded sha256 message digest
String hexencodedDigest = new BigInteger(1, sh).ToString(16).ToUpper();
JObject signed = PDFSigningService.Sign(baseURL, id, hexencodedDigest, access);
String sig = (String)signed.GetValue("signature");
//decode hex signature
byte[] dsg = Hex.Decode(sig);
//include signature on PDF
sgn.SetExternalDigest(dsg, null, "RSA");
//create TimeStamp Client
ITSAClient tsc = new DSSTSAClient(access);
return(sgn.GetEncodedPKCS7(hash, PdfSigner.CryptoStandard.CADES, tsc, ocspCollection, null));
}
public IDigest GetMessageDigest()
{
return(DigestAlgorithms.GetMessageDigest(this.digestAlgorithm));
}
public IDigest GetMessageDigest()
{
return(DigestAlgorithms.GetMessageDigest(DEFAULTHASHALGORITHM));
}
protected C1_02_DigestBC(String password, String algorithm)
{
messageDigest = DigestAlgorithms.GetMessageDigest(algorithm);
digest = DigestAlgorithms.Digest(new MemoryStream(Encoding.UTF8.GetBytes(password)), messageDigest);
}
