public bool VerifySignature(string keyContainerName, string filePath, CspProviderFlags flags)
{
SHA1Managed hash = new SHA1Managed();
RSACryptoServiceProvider rsa = CryptoHelpers.LoadRsaKeys(keyContainerName, filePath, flags);
//the data was signed /without/ Signature having a value, so remove/cache the value
string sig = Signature;
Signature = null;
byte[] signature = CryptoHelpers.DecodeToBytes(sig);
byte[] planBytes = Encoding.UTF8.GetBytes(ToYaml());
bool ok = rsa.VerifyData(planBytes, CryptoConfig.MapNameToOID("SHA1"), signature);
if (ok)
{
byte[] hashedData = hash.ComputeHash(planBytes);
ok = rsa.VerifyHash(hashedData, CryptoConfig.MapNameToOID("SHA1"), signature);
}
//put the Signature back in place.
Signature = sig;
return(ok);
}
