Private Function myEncrypt(ByVal Code As String) As String
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Dim Result As String = ""
Dim CurrentChar As Char
For i As Integer = 0 To Code.Length - 1
CurrentChar = Code.Substring(i, 1)
Select Case Code.Substring(i, 1)
Case "Z"
Result = "a"
Case "z"
Result = "A"
Case Else
Result = Chr(Asc(CurrentChar) + 1)
End Select
Next
Return Result
End Function
'vb.net 2005 调试通过
VB.NET2008和最新的2010都是不需要破解的，微软都提供免费下载和使用。
这个是我之前写的。在需要时调用即可。
Public Shared Function Encrypt(ByVal Text As String, ByVal sKey As String) As String
Dim provider As New DESCryptoServiceProvider()
Dim bytes As Byte() = Encoding.[Default].GetBytes(Text)
provider.Key = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8))
provider.IV = Encoding.ASCII.GetBytes(FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8))
Dim stream As New MemoryStream()
Dim stream2 As New CryptoStream(stream, provider.CreateEncryptor(), CryptoStreamMode.Write)
stream2.Write(bytes, 0, bytes.Length)
stream2.FlushFinalBlock()
Dim builder As New StringBuilder()
For Each num As Byte In stream.ToArray()
builder.AppendFormat("{0:X2}", num)
Next
Return builder.ToString()
End Function
希望能帮到你
我觉得你的并不是RSA加密解密算法。
在.net的有一个System.Security.Cryptography的命名空间，里面有一RSACryptoServiceProvider的类用来对byte进行RSA加密解密。
具体例子如下：
using System;
using System.Security.Cryptography;
using System.Text;
class RSACSPSample
{
static void Main()
{
try
{
//Create a UnicodeEncoder to convert between byte array and string.
UnicodeEncoding ByteConverter = new UnicodeEncoding();
//Create byte arrays to hold original, encrypted, and decrypted data.
byte[] dataToEncrypt = ByteConverter.GetBytes("Data to Encrypt");
byte[] encryptedData;
byte[] decryptedData;
//Create a new instance of RSACryptoServiceProvider to generate
//public and private key data.
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
//Pass the data to ENCRYPT, the public key information
//(using RSACryptoServiceProvider.ExportParameters(false),
//and a boolean flag specifying no OAEP padding.
encryptedData = RSAEncrypt(dataToEncrypt,RSA.ExportParameters(false), false);
//Pass the data to DECRYPT, the private key information
//(using RSACryptoServiceProvider.ExportParameters(true),
//and a boolean flag specifying no OAEP padding.
decryptedData = RSADecrypt(encryptedData,RSA.ExportParameters(true), false);
//Display the decrypted plaintext to the console.
Console.WriteLine("Decrypted plaintext: {0}", ByteConverter.GetString(decryptedData));
}
catch(ArgumentNullException)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine("Encryption failed.");
}
}
static public byte[] RSAEncrypt(byte[] DataToEncrypt, RSAParameters RSAKeyInfo, bool DoOAEPPadding)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
//Import the RSA Key information. This only needs
//toinclude the public key information.
RSA.ImportParameters(RSAKeyInfo);
//Encrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSA.Encrypt(DataToEncrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
static public byte[] RSADecrypt(byte[] DataToDecrypt, RSAParameters RSAKeyInfo,bool DoOAEPPadding)
{
try
{
//Create a new instance of RSACryptoServiceProvider.
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
//Import the RSA Key information. This needs
//to include the private key information.
RSA.ImportParameters(RSAKeyInfo);
//Decrypt the passed byte array and specify OAEP padding.
//OAEP padding is only available on Microsoft Windows XP or
//later.
return RSA.Decrypt(DataToDecrypt, DoOAEPPadding);
}
//Catch and display a CryptographicException
//to the console.
catch(CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
}
[Visual Basic]
Try
'Create a new RSACryptoServiceProvider object.
Dim RSA As New RSACryptoServiceProvider()
'Export the key information to an RSAParameters object.
'Pass false to export the public key information or pass
'true to export public and private key information.
Dim RSAParams As RSAParameters = RSA.ExportParameters(False)
Catch e As CryptographicException
'Catch this exception in case the encryption did
'not succeed.
Console.WriteLine(e.Message)
End Try
[C#]
try
{
//Create a new RSACryptoServiceProvider object.
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
//Export the key information to an RSAParameters object.
//Pass false to export the public key information or pass
//true to export public and private key information.
RSAParameters RSAParams = RSA.ExportParameters(false);
}
catch(CryptographicException e)
{
//Catch this exception in case the encryption did
//not succeed.
Console.WriteLine(e.Message);
}
vb.net code注意随机密码按钮在没用，调试时你自己输入密码，一定为8位，我是将文件存在D盘，你自己在修改一下，那个就很简单
Imports System.IO
Imports System.Security.Cryptography
Imports System.Text
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim sSecretKey As String = Me.TextBox2.Text
EncryptFile(Me.TextBox1.Text, "D:\JMtest.txt", sSecretKey)
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim sSecretKey As String = Me.TextBox2.Text
DecryptFile("D:\JMtest.txt", "D:\Decrypted.txt", sSecretKey)
End Sub
Sub EncryptFile(ByVal sInputFilename As String, ByVal sOutputFilename As String, ByVal sKey As String)
Dim fsInput As New FileStream(sInputFilename, FileMode.Open, FileAccess.Read)
Dim fsEncrypted As New FileStream(sOutputFilename, FileMode.Create, FileAccess.Write)
Dim DES As New DESCryptoServiceProvider
DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey)
DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey)
Dim desencrypt As ICryptoTransform = DES.CreateEncryptor()
Dim cryptostream As New CryptoStream(fsEncrypted, desencrypt, CryptoStreamMode.Write)
Dim byteArrayInput(fsInput.Length - 1) As Byte
fsInput.Read(byteArrayInput, 0, byteArrayInput.Length)
cryptostream.Write(byteArrayInput, 0, byteArrayInput.Length)
cryptostream.Close()
End Sub
Sub DecryptFile(ByVal sInputFilename As String, ByVal sOutputFilename As String, ByVal sKey As String)
Dim DES As New DESCryptoServiceProvider
DES.Key() = ASCIIEncoding.ASCII.GetBytes(sKey)
DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey)
Dim fsread As New FileStream(sInputFilename, FileMode.Open, FileAccess.Read)
Dim desdecrypt As ICryptoTransform = DES.CreateDecryptor
Dim cryptostreamDecr As New CryptoStream(fsread, desdecrypt, CryptoStreamMode.Read)
Dim fsDecrypted As New StreamWriter(sOutputFilename)
fsDecrypted.Write(New StreamReader(cryptostreamDecr, System.Text.ASCIIEncoding.Default).ReadToEnd)
fsDecrypted.Flush()
fsDecrypted.Close()
End Sub
Private Sub BtnChoose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnChoose.Click
OpenFileDialog1.FileName = ""
OpenFileDialog1.Filter = "txt files (*.txt)|*.txt"
OpenFileDialog1.ShowDialog()
If OpenFileDialog1.FileName "" Then
Me.TextBox1.Text = OpenFileDialog1.FileName
End If
End Sub
End Class
重新输入正版序列号就行了，这个往上搜索一下2008和2010都有人写教程的。
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