public bool ValidateSignature(Signature signature, byte[] bytes)
{
bool valid = false;
KeyInfo keyInfo = signature.KeyInfo;
CspParameters parameter = new CspParameters();
RSACryptoServiceProvider rsa;
DSACryptoServiceProvider dsa;
XmlElement KeyInfoXml = keyInfo.GetXml();
Type type = keyInfo.GetType();
if (KeyInfoXml.FirstChild.FirstChild.Name.Equals("RSAKeyValue"))
{
rsa = new RSACryptoServiceProvider(parameter);
rsa.FromXmlString(keyInfo.GetXml().InnerXml);
RSAParameters param = rsa.ExportParameters(false);
byte[] digestSignedInfo = this.DigestElement(signature.SignedInfo.GetXml(), "", "");
XmlElement signed = signature.SignedInfo.GetXml();
string oid = CryptoConfig.MapNameToOID("SHA1");
valid = rsa.VerifyHash(digestSignedInfo, oid, this._signedXml.SignatureValue);
}
else
{
dsa = new DSACryptoServiceProvider(parameter);
dsa.FromXmlString(KeyInfoXml.InnerXml);
byte[] digestSignedInfo = this.DigestElement(signature.SignedInfo.GetXml(), "", "");
string oid = CryptoConfig.MapNameToOID("SHA1");
valid = dsa.VerifyHash(digestSignedInfo, oid, this._signedXml.SignatureValue);
}
return(valid);
}