public bool VerifyHash(Hash hash, string signature, string publicKey)
{
if (!hash.IsSha256Size)
{
throw new ArgumentException("SHA256 hashes are supported exclusivly", nameof(hash));
}
var signatureData = Convert.FromBase64String(signature);
var parameters = AsymmetricKeyFactory.Deserialize(publicKey);
using (var rsa = RSA.Create())
{
rsa.ImportParameters(parameters);
return(rsa.VerifyHash(hash.HashData, signatureData, _hashAlgorithm, _padding));
}
}
public string SignHash(Hash hash, string privateKey)
{
if (!hash.IsSha256Size)
{
throw new ArgumentException("SHA256 hashes are supported exclusively", nameof(hash));
}
var parameters = AsymmetricKeyFactory.Deserialize(privateKey);
using (var rsa = RSA.Create())
{
rsa.ImportParameters(parameters);
var signature = rsa.SignHash(hash.HashData, _hashAlgorithm, _padding);
return(Convert.ToBase64String(signature));
}
}