Winify – Diff between revs 14 and 28

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1 /////////////////////////////////////////////////////////////////////////// 1 ///////////////////////////////////////////////////////////////////////////
2 // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 // 2 // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 //
3 // Please see: http://www.gnu.org/licenses/gpl.html for legal details, // 3 // Please see: http://www.gnu.org/licenses/gpl.html for legal details, //
4 // rights of fair usage, the disclaimer and warranty conditions. // 4 // rights of fair usage, the disclaimer and warranty conditions. //
5 /////////////////////////////////////////////////////////////////////////// 5 ///////////////////////////////////////////////////////////////////////////
6   6  
7 using System.IO; 7 using System.IO;
8 using System.Linq; 8 using System.Linq;
9 using System.Security.Cryptography; 9 using System.Security.Cryptography;
10   10  
11 namespace Winify.Utilities 11 namespace Winify.Utilities
12 { 12 {
13 public static class AES 13 public static class AES
14 { 14 {
15 #region Static Fields and Constants 15 #region Static Fields and Constants
16   16  
17 private const int AESKeySaltBytes = 16; 17 private const int AESKeySaltBytes = 16;
18   18  
19 private static readonly RNGCryptoServiceProvider Rng = new RNGCryptoServiceProvider(); 19 private static readonly RNGCryptoServiceProvider Rng = new RNGCryptoServiceProvider();
20   20  
21 #endregion 21 #endregion
22   22  
23 #region Public Methods 23 #region Public Methods
24   24  
25 /////////////////////////////////////////////////////////////////////////// 25 ///////////////////////////////////////////////////////////////////////////
26 // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 // 26 // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 //
27 /////////////////////////////////////////////////////////////////////////// 27 ///////////////////////////////////////////////////////////////////////////
28 public static byte[] Encrypt(byte[] plain, string password) 28 public static byte[] Encrypt(byte[] plain, string password)
29 { 29 {
30 using (var rijndael = Rijndael.Create()) 30 using (var rijndael = Rijndael.Create())
31 { 31 {
32 rijndael.BlockSize = 128; 32 rijndael.BlockSize = 128;
33 rijndael.Mode = CipherMode.CBC; 33 rijndael.Mode = CipherMode.CBC;
34 rijndael.KeySize = 256; 34 rijndael.KeySize = 256;
35 rijndael.Padding = PaddingMode.PKCS7; 35 rijndael.Padding = PaddingMode.PKCS7;
36 var salt = new byte[AESKeySaltBytes]; 36 var salt = new byte[AESKeySaltBytes];
37 Rng.GetBytes(salt); 37 Rng.GetBytes(salt);
38 var pdb = new Rfc2898DeriveBytes(password, salt, 1000); 38 var pdb = new Rfc2898DeriveBytes(password, salt, 1000);
39 rijndael.Key = pdb.GetBytes(rijndael.KeySize / 8); 39 rijndael.Key = pdb.GetBytes(rijndael.KeySize / 8);
40 rijndael.IV = pdb.GetBytes(rijndael.BlockSize / 8); 40 rijndael.IV = pdb.GetBytes(rijndael.BlockSize / 8);
41   41  
42 using (var memoryStream = new MemoryStream()) 42 using (var memoryStream = new MemoryStream())
43 { 43 {
44 using (var cryptoStream = 44 using (var cryptoStream =
45 new CryptoStream(memoryStream, rijndael.CreateEncryptor(), CryptoStreamMode.Write)) 45 new CryptoStream(memoryStream, rijndael.CreateEncryptor(), CryptoStreamMode.Write))
46 { 46 {
47 cryptoStream.Write(plain, 0, plain.Length); 47 cryptoStream.Write(plain, 0, plain.Length);
48 cryptoStream.Close(); 48 cryptoStream.Close();
49   49  
50 var ciphertext = memoryStream.ToArray(); 50 var ciphertext = memoryStream.ToArray();
51   51  
52 return salt.Concat(ciphertext) 52 return salt.Concat(ciphertext)
53 .ToArray(); 53 .ToArray();
54 } 54 }
55 } 55 }
56 } 56 }
57 } 57 }
58   58  
59 /////////////////////////////////////////////////////////////////////////// 59 ///////////////////////////////////////////////////////////////////////////
60 // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 // 60 // Copyright (C) Wizardry and Steamworks 2016 - License: GNU GPLv3 //
61 /////////////////////////////////////////////////////////////////////////// 61 ///////////////////////////////////////////////////////////////////////////
62 public static byte[] Decrypt(byte[] cipher, string password) 62 public static byte[] Decrypt(byte[] cipher, string password)
63 { 63 {
64 using (var rijndael = Rijndael.Create()) 64 using (var rijndael = Rijndael.Create())
65 { 65 {
66 rijndael.BlockSize = 128; 66 rijndael.BlockSize = 128;
67 rijndael.Mode = CipherMode.CBC; 67 rijndael.Mode = CipherMode.CBC;
68 rijndael.KeySize = 256; 68 rijndael.KeySize = 256;
69 rijndael.Padding = PaddingMode.PKCS7; 69 rijndael.Padding = PaddingMode.PKCS7;
70   70  
71 var salt = cipher.Take(16) 71 var salt = cipher.Take(16)
72 .ToArray(); 72 .ToArray();
73   73  
74 var ciphertext = cipher.Skip(16) 74 var ciphertext = cipher.Skip(16)
75 .ToArray(); 75 .ToArray();
76   76  
77 var pdb = new Rfc2898DeriveBytes(password, salt, 1000); 77 var pdb = new Rfc2898DeriveBytes(password, salt, 1000);
78 rijndael.Key = pdb.GetBytes(rijndael.KeySize / 8); 78 rijndael.Key = pdb.GetBytes(rijndael.KeySize / 8);
79 rijndael.IV = pdb.GetBytes(rijndael.BlockSize / 8); 79 rijndael.IV = pdb.GetBytes(rijndael.BlockSize / 8);
80   80  
81 using (var memoryStream = new MemoryStream()) 81 using (var memoryStream = new MemoryStream())
82 { 82 {
83 using (var cryptoStream = 83 using (var cryptoStream =
84 new CryptoStream(memoryStream, rijndael.CreateDecryptor(), CryptoStreamMode.Write)) 84 new CryptoStream(memoryStream, rijndael.CreateDecryptor(), CryptoStreamMode.Write))
85 { 85 {
86 cryptoStream.Write(ciphertext, 0, ciphertext.Length); 86 cryptoStream.Write(ciphertext, 0, ciphertext.Length);
87 cryptoStream.Close(); 87 cryptoStream.Close();
88   88  
89 return memoryStream.ToArray(); 89 return memoryStream.ToArray();
90 } 90 }
91 } 91 }
92 } 92 }
93 } 93 }
94   94  
95 #endregion 95 #endregion
96 } 96 }
97 } 97 }
98   98  
99
Generated by GNU Enscript 1.6.5.90.
 99
Generated by GNU Enscript 1.6.5.90.
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