c# - HashAlgorithm.Create 在 C# ASP.NET Core 2 中因 PlatformNotSupportedException 而失败

Question

我有一个 ASP.Net MVC 项目，它在使用 HashAlgorithm 时运行良好，但我试图在 ASP.NET Core 2 中复制同一个项目，但出现以下错误:

System.PlatformNotSupportedException HResult=0x80131539Message=Operation is not supported on this platform.Source=System.Security.Cryptography.PrimitivesStackTrace:at System.Security.Cryptography.HashAlgorithm.Create(String hashName)at Hash.Program.EncodePassword(String pass, String salt)

我的代码:

public static string GeneratePassword(int saltlength) //length of salt
{
    const string chars = "abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ0123456789";
    var randNum = new Random();
    var passwordSalt = new char[saltlength];

    for (var i = 0; i <= saltlength - 1; i++) {
        passwordSalt[i] = chars[Convert.ToInt32((chars.Length) * randNum.NextDouble())];
    }
    return new string(passwordSalt);
}
public static string EncodePassword(string pass, string salt) //encrypt password
{
    byte[] bytes = Encoding.Unicode.GetBytes(pass);
    byte[] src = Encoding.Unicode.GetBytes(salt);
    byte[] dst = new byte[src.Length + bytes.Length];
    Buffer.BlockCopy(src, 0, dst, 0, src.Length);
    Buffer.BlockCopy(bytes, 0, dst, src.Length, bytes.Length);
    HashAlgorithm algorithm = HashAlgorithm.Create("MD5");
    if (algorithm != null) {
        byte[] inArray = algorithm.ComputeHash(dst);
        var encodedPassword = Convert.ToBase64String(inArray);
        return encodedPassword;
    }
    return pass;
}

关于如何修复这个错误有什么建议吗？

Answer 1

有一个github issue对于这个问题，它提供了一种解决方法:

Workaround is to call (HashAlgorithm)CryptoConfig.CreateFromName(string), though calling CryptoConfig directly is generally discouraged.