vb.net密码算法 vb加密算法

求VB.NET的MD5算法调用

下面是完整的类，可以设置任意密码

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'DES及md5加密解密----添加引用中添加对system.web的引用。

Imports System.Security.Cryptography

Imports System

Imports System.Text

Imports System.Web

''' summary

''' DES加密类

''' /summary

''' remarks/remarks

Public Class DESEncrypt

Public Sub DESEncrypt()

End Sub

Public Shared Function Encrypt(ByVal Text As String) As String

Return Encrypt(Text, "12345678")

End Function

Public Shared Function Encrypt(ByVal Text As String, ByVal sKey As String) As String

Dim des As New DESCryptoServiceProvider()

Dim inputByteArray As Byte()

inputByteArray = Encoding.Default.GetBytes(Text)

des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8))

des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8))

Dim ms As New System.IO.MemoryStream()

Dim cs As New CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write)

cs.Write(inputByteArray, 0, inputByteArray.Length)

cs.FlushFinalBlock()

Dim ret As New StringBuilder()

Dim b As Byte

For Each b In ms.ToArray()

ret.AppendFormat("{0:X2}", b)

Next

Return ret.ToString()

End Function

Public Shared Function Decrypt(ByVal Text As String) As String

Return Decrypt(Text, "12345678")

End Function

Public Shared Function Decrypt(ByVal Text As String, ByVal sKey As String) As String

Dim des As New DESCryptoServiceProvider()

Dim len As Integer

len = Text.Length / 2

Dim inputByteArray(len - 1) As Byte

Dim x, i As Integer

For x = 0 To len - 1

i = Convert.ToInt32(Text.Substring(x * 2, 2), 16)

inputByteArray(x) = CType(i, Byte)

Next

des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8))

des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8))

Dim ms As New System.IO.MemoryStream()

Dim cs As New CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write)

cs.Write(inputByteArray, 0, inputByteArray.Length)

cs.FlushFinalBlock()

Return Encoding.Default.GetString(ms.ToArray())

End Function

End Class

'以下是调用方法

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click '加密

Dim str_Encrypt As String = DESEncrypt.Encrypt("你要加密的文本，可以是任意长度", "密码，可以很长，如果省略这个参数就是默认的12345678")

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click '解密

Dim str_Decrypt As String = DESEncrypt.Decrypt("你要解密的文本, 可以是任意长度", "加密时用到的密码，如果省略这个参数就是默认的12345678")

End Sub

vb.net中实现rsa加密解密 急！急！

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);

}

简单VB.NET加密与解密

Private Function myEncrypt(ByVal Code As String) As String

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

文章标题：vb.net密码算法 vb加密算法
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