Converting a byte array to string and then back again produced different results

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离开以前
离开以前 2021-01-12 16:12

I\'m using the .net port of libsodium. The hash generation function has two forms, one that accepts byte arrays and one that accepts strings:

public static b         


        
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  •  醉梦人生
    2021-01-12 16:45

    Converting a byte array to string and then back again produced different results

    A binary data may not be converted to string and then back to byte array using Encoding.[AnyEncoding].GetBytes and Encoding.[AnyEncoding].GetString

    Instead use Convert.ToBase64String and Convert.FromBase64String

    You can easily test...

    var bytes = new byte[] { 255, 255, 255 }; 
    var buf = Encoding.UTF8.GetString(bytes);
    var newbytes = Encoding.UTF8.GetBytes(buf);
    

    newbytes's length will be 9.....

    Edit: This is the test case for @Theo

    var bytes = new byte[] { 0, 216 }; //any new byte[] { X, 216 };
    var buf = Encoding.Unicode.GetString(bytes);
    var newbytes = Encoding.Unicode.GetBytes(buf); //253,255
    

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