public static async Task <string> DecryptRSATextToTextAsync(string text, string privateKey, string passphrase)
{
byte[] byteArrayText1 = Encoding.UTF8.GetBytes(text);
MemoryStream encMemoryStream1 = new MemoryStream(byteArrayText1);
byte[] byteArrayPrvKey = Encoding.UTF8.GetBytes(privateKey);
MemoryStream streamPrv = new MemoryStream(byteArrayPrvKey);
var streamDecOut = new MemoryStream();
using (ChoPGPEncryptDecrypt pgp = new ChoPGPEncryptDecrypt())
{
await pgp.DecryptAsync(encMemoryStream1, streamDecOut, streamPrv, passphrase);
}
byte[] decryptedBytes = streamDecOut.ToArray();
var decryptedText = Encoding.UTF8.GetString(decryptedBytes);
return(decryptedText);
}