public string SignFromText(string plaintextMessage, bool bDetached, Encoding encodingType)
{
CAPICOM.SignedData signedData = new CAPICOM.SignedDataClass();
CAPICOM.Utilities u = new CAPICOM.UtilitiesClass();
signedData.Content = (u.ByteArrayToBinaryString(encodingType.GetBytes(plaintextMessage)));
CAPICOM.Signer signer = new CAPICOM.Signer();
signer.Certificate = ClientCert;
this._signedContent = signedData.Sign(signer, bDetached, CAPICOM.CAPICOM_ENCODING_TYPE.CAPICOM_ENCODE_BASE64);
return(_signedContent);
}
public bool VerifyDetachedSignature(string plaintextMessage, string signedContent, Encoding encodingType)
{
try
{
this._clearText = plaintextMessage;
this._signedContent = signedContent;
CAPICOM.SignedData signedData = new CAPICOM.SignedDataClass();
CAPICOM.Utilities u = new CAPICOM.UtilitiesClass();
signedData.Content = (u.ByteArrayToBinaryString(encodingType.GetBytes(plaintextMessage)));
signedData.Verify(_signedContent, true, CAPICOM.CAPICOM_SIGNED_DATA_VERIFY_FLAG.CAPICOM_VERIFY_SIGNATURE_ONLY);
SignerCert = null;
CAPICOM.Signer s = (CAPICOM.Signer)signedData.Signers[1];
SignerCert = (CAPICOM.Certificate)s.Certificate;
return(true);
}
catch (COMException e)
{
return(false);
}
}