簡單VB.NET加密與解密

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 調(diào)試通過

誰有VB.net2008的破解版的下載地址？

VB.NET2008和最新的2010都是不需要破解的，微軟都提供免費下載和使用。

加密解密高手進！VB.NET 誰能給一個MD5或其他的加密算法

這個是我之前寫的。在需要時調(diào)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

希望能幫到你

vb.net中實現(xiàn)rsa加密解密 急！急！

我覺得你的并不是RSA加密解密算法。

在.net的有一個System.Security.Cryptography的命名空間，里面有一RSACryptoServiceProvider的類用來對byte進行RSA加密解密。

具體例子如下：

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);

}

我想做一個加密解密文件的VB程序！用des加密解密方法?。?！ 希望高手解答！

vb.net code注意隨機密碼按鈕在沒用，調(diào)試時你自己輸入密碼，一定為8位，我是將文件存在D盤，你自己在修改一下，那個就很簡單

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

安裝了一個vb.net,提示試用期已過，有辦法破解嗎？

重新輸入正版序列號就行了，這個往上搜索一下2008和2010都有人寫教程的。

分享題目：vb.net如何破解,VB net
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