[ACCEPTED]-How to calculate sha 512 hash properly in .NET 6-.net-6.0

Accepted answer

Score: 11

    public string CreateSHA512(string strData)
    {
        var message = Encoding.UTF8.GetBytes(strData);
        using (var alg = SHA512.Create())
        {
            string hex = "";

            var hashValue = alg.ComputeHash(message);
            foreach (byte x in hashValue)
            {
                hex += String.Format("{0:x2}", x);
            }
            return hex;
        }
    }

Score: 4

you can use this method

public string GetSha256Hash(string input)
{
    using (var hashAlgorithm = SHA512.Create())
    {
        var byteValue = Encoding.UTF8.GetBytes(input);
        var byteHash = hashAlgorithm.ComputeHash(byteValue);
        return Convert.ToBase64String(byteHash);
    }
}

Score: 0

In my case I was using RNGCryptoServiceProvider 5 in .NET 5 but when I updated to .NET 6 I 4 got the same warning. After reading about 3 it in this issue I changed my code from this:

public string HashPassword(string plainPassword)
{
    if (string.IsNullOrEmpty(plainPassword))
    {
        throw new ArgumentNullException(nameof(plainPassword));
    }

    var cryptoProvider = new RNGCryptoServiceProvider();
    byte[] salt = new byte[SaltByteSize];
    cryptoProvider.GetBytes(salt);

    byte[] hash = GetPbkdf2Bytes(plainPassword, salt, Pbkdf2Iterations, HashByteSize);

    return $"{Pbkdf2Iterations}:{Convert.ToBase64String(salt)}:{Convert.ToBase64String(hash)}";
}

To this:

public string HashPassword(string plainPassword)
{
    if (string.IsNullOrEmpty(plainPassword))
    {
        throw new ArgumentNullException(nameof(plainPassword));
    }

    byte[] salt = RandomNumberGenerator.GetBytes(SaltByteSize);
    byte[] hash = GetPbkdf2Bytes(plainPassword, salt, Pbkdf2Iterations, HashByteSize);

    return $"{Pbkdf2Iterations}:{Convert.ToBase64String(salt)}:{Convert.ToBase64String(hash)}";
}

I 2 know it's not exactly the same class but 1 they are related.

Score: 0

You can also based on the description of 1 Microsoft website in this link, use this code:

// Disable the warning.
#pragma warning disable SYSLIB0001

// Code that uses obsolete API.
//...

// Re-enable the warning.
#pragma warning restore SYSLIB0001

Source: stackoverflow.com

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