求VB.NET的MD5算法調用

下面是完整的類，可以設置任意密碼

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

Imports?System.Security.Cryptography

Imports?System

Imports?System.Text

Imports?System.Web

'''?summary

'''?DES加密類

'''?/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

'以下是調用方法

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，可以是任意長度",?"密碼，可以很長，如果省略這個參數(shù)就是默認的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,?可以是任意長度",?"加密時用到的密碼，如果省略這個參數(shù)就是默認的12345678")

End?Sub

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);

}

簡單VB.NET加密與解密

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 調試通過

文章標題：vb.net密碼算法 vb加密算法
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