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