Specified Method is not supported.

[vaz83]

Hi,
i'm trying to encrypt data, but i am having a Specified Method is not supported.

Target is a Windows application, .NET 4.5.2

protected RSACryptoServiceProvider CreateProvider()
        {
            var privateKeyText = GetPrivateKey();

            IOpenSSLPrivateKeyDecoder decoder = new OpenSSLPrivateKeyDecoder();
            var RSA1 = decoder.Decode(privateKeyText);

            return RSA1;

        }

        public static string Encrypt(string decryptedData)
        {
            Utils c = new Utils();
            
            var val =  c.CreateProvider().SignData(new UTF8Encoding().GetBytes(decryptedData), CryptoConfig.MapNameToOID("SHA1"));
            return Convert.ToBase64String(val);
        }

I call the function Encrypt, but when it's called the CreateProvider() function, on the " var RSA1 = decoder.Decode(privateKeyText);" it gives the exception.

Any ideas?

[StefH]

Hello @vaz83 ,

Can you please provide a full working example ? It's very difficult for me to understand the error based on your code.