加密与解密

Imports System.IO
Imports System.Security.Cryptography
'数据加/解密　类
Public Class CryData
'加密密钥，初始化向量
Public ReadOnly cryKey As Byte() = {9, 4, 2, 8, 5, 1, 4, 9, 7, 6, 9, 5, 1, 13, 7, 5, 14, 9, 10, 15, 0, 1, 14, 5, 9, 4, 3, 8, 2, 10}
Public ReadOnly cryIV As Byte() = {7, 1, 8, 8, 2, 8, 7, 1, 4, 5, 6, 3, 5, 6, 7}
' 文件加密
Public Sub EncryptData(ByVal inName As String, ByVal outName As String, _
Optional ByVal rijnKey() As Byte = Nothing, _
Optional ByVal rijnIV() As Byte = Nothing)
If rijnKey Is Nothing Then
rijnKey = cryKey
End If
If rijnIV Is Nothing Then
rijnIV = cryIV
End If
ReDim Preserve rijnKey(31)
ReDim Preserve rijnIV(15)
'Create the file streams to handle the input and output files.
Dim fin As New FileStream(inName, FileMode.Open, FileAccess.Read)
Dim fout As New FileStream(outName, FileMode.OpenOrCreate, FileAccess.ReadWrite)
fout.SetLength(0)
'Create variables to help with read and write.
Dim bin(1024) As Byte 'This is intermediate storage for the encryption.
Dim rdlen As Long = 0 'This is the total number of bytes written.
Dim totlen As Long = fin.Length 'Total length of the input file.
Dim len As Integer 'This is the number of bytes to be written at a time.
'Creates the default implementation, which is RijndaelManaged.