我的一位同事能够帮助我.下面是哈希函数的外观.进行此更改后，ASP.NET Identity便可以使用现有的ASP.NET Membership数据库.

One of my coworkers was able to help me out. Below is what the hash function should look like. With this change, ASP.NET Identity is able to piggy back on an existing ASP.NET Membership database.

private void HashPassword(string password, out string passwordHash, ref string passwordSalt)
    {
        byte[] passwordBytes = Encoding.Unicode.GetBytes(password);
        byte[] saltBytes = null;

        if (!string.IsNullOrEmpty(passwordSalt))
        {
            saltBytes = Convert.FromBase64String(passwordSalt);
        }
        else
        {
            saltBytes = new byte[128 / 8];
            using (var rng = RandomNumberGenerator.Create())
            {
                rng.GetBytes(saltBytes);
            }
        }

        byte[] totalBytes = new byte[saltBytes.Length + passwordBytes.Length];
        Buffer.BlockCopy(saltBytes, 0, totalBytes, 0, saltBytes.Length);
        Buffer.BlockCopy(passwordBytes, 0, totalBytes, saltBytes.Length, passwordBytes.Length);

        using (SHA1 hashAlgorithm = SHA1.Create())
        {
            passwordHash = Convert.ToBase64String(hashAlgorithm.ComputeHash(totalBytes));
        }

        passwordSalt = Convert.ToBase64String(saltBytes);
    }

您可以在GitHib上找到所有源代码.

You can find all the source code on GitHib.