112 lines
4.0 KiB
VB.net
112 lines
4.0 KiB
VB.net
#Region "Microsoft.VisualBasic::e5cfa890b656e93e3a8988f76e1e286f, Microsoft.VisualBasic.Core\Extensions\Security\AES.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Class AES
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'
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' Constructor: (+1 Overloads) Sub New
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' Function: Decrypt, DecryptString, Encrypt, EncryptData
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.Runtime.CompilerServices
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Imports System.Security.Cryptography
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Imports System.Text
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Imports Microsoft.VisualBasic.Text
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Namespace SecurityString
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Public Class AES : Inherits SecurityStringModel
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ReadOnly textEncoding As Encoding
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Sub New(pass$, Optional encoding As Encodings = Encodings.UTF8WithoutBOM)
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Me.strPassphrase = pass
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Me.textEncoding = encoding.CodePage
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End Sub
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Public Overrides Function Decrypt(input() As Byte) As Byte()
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Dim AES As New RijndaelManaged
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Dim hashAES As New MD5CryptoServiceProvider
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Dim hash(31) As Byte
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Dim temp As Byte() = hashAES.ComputeHash(ASCIIEncoding.ASCII.GetBytes(strPassphrase))
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Array.Copy(temp, 0, hash, 0, 16)
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Array.Copy(temp, 0, hash, 15, 16)
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AES.Key = hash
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AES.Mode = CipherMode.ECB
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Dim DESDecrypter As ICryptoTransform = AES.CreateDecryptor
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Dim Buffer As Byte() = input
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Buffer = DESDecrypter.TransformFinalBlock(Buffer, 0, Buffer.Length)
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Return Buffer
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End Function
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''' <summary>
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'''
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''' </summary>
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''' <param name="text">密文数据的base64字符串</param>
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''' <returns></returns>
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Overrides Function DecryptString(text As String) As String
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Return textEncoding.GetString(Decrypt(Convert.FromBase64String(text)))
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End Function
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Public Overrides Function Encrypt(input() As Byte) As Byte()
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Dim AES As New RijndaelManaged
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Dim hashAES As New MD5CryptoServiceProvider
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Dim hash(31) As Byte
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Dim temp As Byte() = hashAES.ComputeHash(ASCIIEncoding.ASCII.GetBytes(strPassphrase))
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Array.Copy(temp, 0, hash, 0, 16)
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Array.Copy(temp, 0, hash, 15, 16)
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AES.Key = hash
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AES.Mode = CipherMode.ECB
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Dim DESEncrypter As ICryptoTransform = AES.CreateEncryptor
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Dim Buffer As Byte() = input
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Buffer = DESEncrypter.TransformFinalBlock(Buffer, 0, Buffer.Length)
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Return Buffer
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End Function
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''' <summary>
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''' 加密明文，然后使用base64字符串输出结果
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''' </summary>
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''' <param name="text"></param>
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''' <returns></returns>
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'''
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Overrides Function EncryptData(text As String) As String
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Return Convert.ToBase64String(Encrypt(textEncoding.GetBytes(text)))
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End Function
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End Class
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End Namespace
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