1 | #Region "Microsoft.VisualBasic::e5cfa890b656e93e3a8988f76e1e286f, Microsoft.VisualBasic.Core\Extensions\Security\AES.vb" |
2 | |
3 | ' Author: |
4 | ' |
5 | ' asuka (amethyst.asuka@gcmodeller.org) |
6 | ' xie (genetics@smrucc.org) |
7 | ' xieguigang (xie.guigang@live.com) |
8 | ' |
9 | ' Copyright (c) 2018 GPL3 Licensed |
10 | ' |
11 | ' |
12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
13 | ' |
14 | ' |
15 | ' This program is free software: you can redistribute it and/or modify |
16 | ' it under the terms of the GNU General Public License as published by |
17 | ' the Free Software Foundation, either version 3 of the License, or |
18 | ' (at your option) any later version. |
19 | ' |
20 | ' This program is distributed in the hope that it will be useful, |
21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
23 | ' GNU General Public License for more details. |
24 | ' |
25 | ' You should have received a copy of the GNU General Public License |
26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
27 | |
28 | |
29 | |
30 | ' /********************************************************************************/ |
31 | |
32 | ' Summaries: |
33 | |
34 | ' Class AES |
35 | ' |
36 | ' Constructor: (+1 Overloads) Sub New |
37 | ' Function: Decrypt, DecryptString, Encrypt, EncryptData |
38 | ' |
39 | ' |
40 | ' /********************************************************************************/ |
41 | |
42 | #End Region |
43 | |
44 | Imports System.Runtime.CompilerServices |
45 | Imports System.Security.Cryptography |
46 | Imports System.Text |
47 | Imports Microsoft.VisualBasic.Text |
48 | |
49 | Namespace SecurityString |
50 | |
51 | Public Class AES : Inherits SecurityStringModel |
52 | |
53 | ReadOnly textEncoding As Encoding |
54 | |
55 | Sub New(pass$, Optional encoding As Encodings = Encodings.UTF8WithoutBOM) |
56 | Me.strPassphrase = pass |
57 | Me.textEncoding = encoding.CodePage |
58 | End Sub |
59 | |
60 | Public Overrides Function Decrypt(input() As Byte) As Byte() |
61 | Dim AES As New RijndaelManaged |
62 | Dim hashAES As New MD5CryptoServiceProvider |
63 | Dim hash(31) As Byte |
64 | Dim temp As Byte() = hashAES.ComputeHash(ASCIIEncoding.ASCII.GetBytes(strPassphrase)) |
65 | Array.Copy(temp, 0, hash, 0, 16) |
66 | Array.Copy(temp, 0, hash, 15, 16) |
67 | AES.Key = hash |
68 | AES.Mode = CipherMode.ECB |
69 | Dim DESDecrypter As ICryptoTransform = AES.CreateDecryptor |
70 | Dim Buffer As Byte() = input |
71 | Buffer = DESDecrypter.TransformFinalBlock(Buffer, 0, Buffer.Length) |
72 | Return Buffer |
73 | End Function |
74 | |
75 | ''' <summary> |
76 | ''' |
77 | ''' </summary> |
78 | ''' <param name="text">密文数据的base64字符串</param> |
79 | ''' <returns></returns> |
80 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
81 | Public Overrides Function DecryptString(text As String) As String |
82 | Return textEncoding.GetString(Decrypt(Convert.FromBase64String(text))) |
83 | End Function |
84 | |
85 | Public Overrides Function Encrypt(input() As Byte) As Byte() |
86 | Dim AES As New RijndaelManaged |
87 | Dim hashAES As New MD5CryptoServiceProvider |
88 | Dim hash(31) As Byte |
89 | Dim temp As Byte() = hashAES.ComputeHash(ASCIIEncoding.ASCII.GetBytes(strPassphrase)) |
90 | Array.Copy(temp, 0, hash, 0, 16) |
91 | Array.Copy(temp, 0, hash, 15, 16) |
92 | AES.Key = hash |
93 | AES.Mode = CipherMode.ECB |
94 | Dim DESEncrypter As ICryptoTransform = AES.CreateEncryptor |
95 | Dim Buffer As Byte() = input |
96 | Buffer = DESEncrypter.TransformFinalBlock(Buffer, 0, Buffer.Length) |
97 | Return Buffer |
98 | End Function |
99 | |
100 | ''' <summary> |
101 | ''' 加密明文,然后使用base64字符串输出结果 |
102 | ''' </summary> |
103 | ''' <param name="text"></param> |
104 | ''' <returns></returns> |
105 | ''' |
106 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
107 | Public Overrides Function EncryptData(text As String) As String |
108 | Return Convert.ToBase64String(Encrypt(textEncoding.GetBytes(text))) |
109 | End Function |
110 | End Class |
111 | End Namespace |