public string SignAuthCookieV1(string cookie)
{
byte[] privateKey = this.GetPrivateKey(KeyType.AuthCookieV1);
//// The array to store the signed message in bytes
byte[] signedBytes;
using (var rsa = new RSACryptoServiceProvider())
{
// Write the message to a byte array using UTF8 as the encoding.
byte[] originalData = System.Text.Encoding.UTF8.GetBytes(cookie);
try
{
// Import the private key used for signing the message
rsa.ImportParameters(SecureSigningService.FromBinaryToRSAParameters(privateKey));
signedBytes = rsa.SignData(originalData, CryptoConfig.MapNameToOID("SHA512"));
}
catch (CryptographicException e)
{
Console.WriteLine(e.Message);
return(null);
}
finally
{
//// Set the keycontainer to be cleared when rsa is garbage collected.
rsa.PersistKeyInCsp = false;
}
}
// Convert the a base64 string before returning
return(Convert.ToBase64String(signedBytes));
}
public bool VerifyAuthCookieV1(string cookie, string sign)
{
byte[] publicKey = this.GetPublicKey(KeyType.AuthCookieV1);
using (var rsa = new RSACryptoServiceProvider())
{
byte[] originalData = System.Text.Encoding.UTF8.GetBytes(cookie);
byte[] signedBytes = Convert.FromBase64String(sign);
try
{
// Import the private key used for signing the message
rsa.ImportParameters(SecureSigningService.FromBinaryToRSAParameters(publicKey));
return(rsa.VerifyData(originalData, CryptoConfig.MapNameToOID("SHA512"), signedBytes));
}
catch (CryptographicException e)
{
return(false);
}
finally
{
//// Set the keycontainer to be cleared when rsa is garbage collected.
rsa.PersistKeyInCsp = false;
}
}
}
private void CreateKeys(KeyType type, SqlConnection connection, SqlTransaction sqlTransaction, out byte[] publicKey, out byte[] privateKey)
{
byte[] publicKeyInternal = null;
byte[] privateKeyInternal = null;
publicKey = null;
privateKey = null;
SecureSigningService.GenerateKeys(out publicKeyInternal, out privateKeyInternal);
// Create the Command and Parameter objects.
using (SqlCommand command = new SqlCommand(SecureSigningService.InsertKeyCommandString, connection, sqlTransaction))
{
command.Parameters.AddWithValue("@publicKey", publicKeyInternal);
command.Parameters.AddWithValue("@privateKey", privateKeyInternal);
command.Parameters.AddWithValue("@keyType", type);
command.ExecuteScalar();
sqlTransaction.Commit();
publicKey = publicKeyInternal;
privateKey = privateKeyInternal;
}
}