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1using System;
2using System.Collections.Generic;
3using System.Linq;
4using System.Text;
5using System.Threading.Tasks;
6using System.Security.Cryptography;
7
8namespace Common
9{
10    public class Encryption
11    {
12        public string HashString(string mytext)
13        {
14            SHA256 myAlg = SHA256.Create(); //initialize the algorithm instance
15
16            byte[] input = Encoding.UTF32.GetBytes(mytext); //converting from string to byte[]
17
18            byte[] digest = myAlg.ComputeHash(input); //hashing byte[] >> base64 bytes
19
20            return Convert.ToBase64String(digest); //converting back from byte[] to string
21        }
22
23        public SymmetricParameters GenerateSymmetricParameters(string input)
24        {
25            Rfc2898DeriveBytes rfc = new Rfc2898DeriveBytes(input, new byte[] { 20, 240, 69, 1, 50, 120});
26
27            Rijndael myAlg = Rijndael.Create();
28
29            SymmetricParameters myParams = new SymmetricParameters()
30            {
31                SecretKey = rfc.GetBytes(myAlg.KeySize / 8),
32                IV = rfc.GetBytes(myAlg.BlockSize / 8)
33            };
34
35            return myParams;
36        }
37
38        public string EncryptString(string input, string passwordToBeUsedInSecurity)
39        {
40            SymmetricParameters myParameters = GenerateSymmetricParameters(passwordToBeUsedInSecurity);
41
42            Rijndael myAlg = Rijndael.Create();
43
44            byte[] clearDataAsBytes = Encoding.UTF32.GetBytes(input);
45        }
46    }
47
48    public class SymmetricParameters
49    {
50        public byte[] SecretKey { get; set; }
51        public byte[] IV { get; set; }
52    }
53}