Server/Secure.cs
author StephaneLenclud
Sun, 08 Jan 2017 12:19:35 +0100
changeset 278 2481c46d1f93
permissions -rw-r--r--
Reading audio output is stopped when audio visualizers are not in used.
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Security;
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using System.Text;
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using System.Threading.Tasks;
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namespace SharpDisplayManager
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{
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    /// <summary>
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    /// As per: http://weblogs.asp.net/jongalloway/encrypting-passwords-in-a-net-app-config-file
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    /// </summary>
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    class Secure
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    {
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        static byte[] entropy = System.Text.Encoding.Unicode.GetBytes("kd566slqfjls234895DFG743fqdlskj345SDFDepozwxc,n*ù^$^é");
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        public static string EncryptString(System.Security.SecureString input)
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        {
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            byte[] encryptedData = System.Security.Cryptography.ProtectedData.Protect(
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                System.Text.Encoding.Unicode.GetBytes(ToInsecureString(input)),
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                entropy,
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                System.Security.Cryptography.DataProtectionScope.CurrentUser);
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            return Convert.ToBase64String(encryptedData);
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        }
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        public static SecureString DecryptString(string encryptedData)
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        {
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            try
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            {
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                byte[] decryptedData = System.Security.Cryptography.ProtectedData.Unprotect(
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                    Convert.FromBase64String(encryptedData),
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                    entropy,
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                    System.Security.Cryptography.DataProtectionScope.CurrentUser);
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                return ToSecureString(System.Text.Encoding.Unicode.GetString(decryptedData));
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            }
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            catch
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            {
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                return new SecureString();
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            }
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        }
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        public static SecureString ToSecureString(string input)
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        {
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            SecureString secure = new SecureString();
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            foreach (char c in input)
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            {
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                secure.AppendChar(c);
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            }
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            secure.MakeReadOnly();
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            return secure;
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        }
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        public static string ToInsecureString(SecureString input)
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        {
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            string returnValue = string.Empty;
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            IntPtr ptr = System.Runtime.InteropServices.Marshal.SecureStringToBSTR(input);
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            try
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            {
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                returnValue = System.Runtime.InteropServices.Marshal.PtrToStringBSTR(ptr);
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            }
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            finally
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            {
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                System.Runtime.InteropServices.Marshal.ZeroFreeBSTR(ptr);
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            }
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            return returnValue;
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        }
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    }
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}