SHA256 or SHA512 on a UWP 10 Mobile .NET game

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SHA256 or SHA512 on a UWP 10 Mobile .NET game







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  1. I wanted to add SHA512 to check if my save game has been edited. But i get this error

    1. Assets\scr.cs(29,17): error CS0246: The type or namespace name ‘SHA256’ could not be found (are you missing a using directive or an assembly reference?)

    This works on a IL2CPP scripting backend game.
    But the unity IAP system doesnt work on IL2CPP.

    IAP is the priority so is there anyway that i can use SHA256 or SHA512 on .NET scripting backend with Universal 10 module?

  2. Yes, but crypto API has changed.

    You should use namespaces `Windows.Security.Cryptography` and `Windows.Security.Cryptography.Core` — you can import them entirely; or (to avoid scope pollution) can introduce explicit aliases for just the types you need (if you don’t mind verbosity), for example:

    3. using System.Runtime.InteropServices.WindowsRuntime;
    4. using Wscc = Windows.Security.Cryptography.Core;
    5. using BinaryStringEncoding = Windows.Security.Cryptography.BinaryStringEncoding;
    6. using CryptographicBuffer = Windows.Security.Cryptography.CryptographicBuffer;
    7. using CryptographicEngine = Windows.Security.Cryptography.Core.CryptographicEngine;
    8. using CryptographicKey = Windows.Security.Cryptography.Core.CryptographicKey;
    9. using MacAlgorithmNames = Windows.Security.Cryptography.Core.MacAlgorithmNames;
    10. using MacAlgorithmProvider = Windows.Security.Cryptography.Core.MacAlgorithmProvider;
    11. using IBuffer = Windows.Storage.Streams.IBuffer;
    2.     Wscc.HashAlgorithmProvider hashAlgo = Wscc.HashAlgorithmProvider.OpenAlgorithm(Wscc.HashAlgorithmNames.Sha256);
    4.     using (System.Security.Cryptography.HashAlgorithm hashAlgo = new System.Security.Cryptography.SHA256Managed())
    8.         IBuffer input = CryptographicBuffer.ConvertStringToBinary(“Example”, BinaryStringEncoding.Utf8);
    9.         byte[] hashBytes = hashAlgo.HashData(input).ToArray();
    11.         byte[] input = System.Text.Encoding.UTF8.GetBytes(“Example”);
    12.         byte[] hashBytes = hashAlgo.ComputeHash(input);

    Consider using HMAC-SHA256 instead of plain SHA256 with home-made salting.

  3. Thank you, I’ll try this and let you know.