求VB.NET生成TET文件的加密方法

使用加密方式存儲即可實現(xiàn)別人無法查看內(nèi)容，加密的方式有很多，適用你這里使用的是可逆的算法，推薦你使用DES加密

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Imports?System ?

Imports?System.Collections.Generic ?

Imports?System.Text ?

Imports?System.IO ?

Imports?System.Security ?

Imports?System.Security.Cryptography ?

Namespace?ZU14 ?

NotInheritable?Public?Class?DES ?

Private?iv?As?String?=?"1234的yzo"?

Private?key?As?String?=?"123在yzo"?

'/?summary?

'/?DES加密偏移量，必須是=8位長的字符串 ?

'/?/summary?

Public?Property?IV()?As?String ?

Get ?

Return?iv ?

End?Get ?

Set ?

iv?=?value?

End?Set ?

End?Property ?

'/?summary?

'/?DES加密的私鑰，必須是8位長的字符串 ?

'/?/summary?

Public?Property?Key()?As?String ?

Get ?

Return?key ?

End?Get ?

Set ?

key?=?value?

End?Set ?

End?Property ?

'/?summary?

'/?對字符串進行DES加密 ?

'/?/summary?

'/?param?name="sourceString"待加密的字符串/param?

'/?returns加密后的BASE64編碼的字符串/returns?

Public?Function?Encrypt(sourceString?As?String)?As?String ?

Dim?btKey?As?Byte()?=?Encoding.Default.GetBytes(key) ?

Dim?btIV?As?Byte()?=?Encoding.Default.GetBytes(iv) ?

Dim?des?As?New?DESCryptoServiceProvider() ?

Dim?ms?As?New?MemoryStream() ?

Try ?

Dim?inData?As?Byte()?=?Encoding.Default.GetBytes(sourceString) ?

Try ?

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

Try ?

cs.Write(inData,?0,?inData.Length) ?

cs.FlushFinalBlock() ?

Finally ?

cs.Dispose() ?

End?Try ?

Return?Convert.ToBase64String(ms.ToArray()) ?

Catch ?

End?Try ?

Finally ?

ms.Dispose() ?

End?Try ?

End?Function?'Encrypt ?

'/?summary?

'/?對DES加密后的字符串進行解密 ?

'/?/summary?

'/?param?name="encryptedString"待解密的字符串/param?

'/?returns解密后的字符串/returns?

Public?Function?Decrypt(encryptedString?As?String)?As?String ?

Dim?btKey?As?Byte()?=?Encoding.Default.GetBytes(key) ?

Dim?btIV?As?Byte()?=?Encoding.Default.GetBytes(iv) ?

Dim?des?As?New?DESCryptoServiceProvider() ?

Dim?ms?As?New?MemoryStream() ?

Try ?

Dim?inData?As?Byte()?=?Convert.FromBase64String(encryptedString) ?

Try ?

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

Try ?

cs.Write(inData,?0,?inData.Length) ?

cs.FlushFinalBlock() ?

Finally ?

cs.Dispose() ?

End?Try ?

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

Catch ?

End?Try ?

Finally ?

ms.Dispose() ?

End?Try ?

End?Function?'Decrypt ?

'/?summary?

'/?對文件內(nèi)容進行DES加密 ?

'/?/summary?

'/?param?name="sourceFile"待加密的文件絕對路徑/param?

'/?param?name="destFile"加密后的文件保存的絕對路徑/param?

Overloads?Public?Sub?EncryptFile(sourceFile?As?String,?destFile?As?String) ?

If?Not?File.Exists(sourceFile)?Then ?

Throw?New?FileNotFoundException("指定的文件路徑不存在！",?sourceFile) ?

End?If ?

Dim?btKey?As?Byte()?=?Encoding.Default.GetBytes(key) ?

Dim?btIV?As?Byte()?=?Encoding.Default.GetBytes(iv) ?

Dim?des?As?New?DESCryptoServiceProvider() ?

Dim?btFile?As?Byte()?=?File.ReadAllBytes(sourceFile) ?

Dim?fs?As?New?FileStream(destFile,?FileMode.Create,?FileAccess.Write) ?

Try ?

Try ?

Dim?cs?As?New?CryptoStream(fs,?des.CreateEncryptor(btKey,?btIV),?CryptoStreamMode.Write) ?

Try ?

cs.Write(btFile,?0,?btFile.Length) ?

cs.FlushFinalBlock() ?

Finally ?

cs.Dispose() ?

End?Try ?

Catch ?

Finally ?

fs.Close() ?

End?Try ?

Finally ?

fs.Dispose() ?

End?Try ?

End?Sub?'EncryptFile ?

'/?summary?

'/?對文件內(nèi)容進行DES加密，加密后覆蓋掉原來的文件 ?

'/?/summary?

'/?param?name="sourceFile"待加密的文件的絕對路徑/param?

Overloads?Public?Sub?EncryptFile(sourceFile?As?String) ?

EncryptFile(sourceFile,?sourceFile) ?

End?Sub?'EncryptFile ?

'/?summary?

'/?對文件內(nèi)容進行DES解密 ?

'/?/summary?

'/?param?name="sourceFile"待解密的文件絕對路徑/param?

'/?param?name="destFile"解密后的文件保存的絕對路徑/param?

Overloads?Public?Sub?DecryptFile(sourceFile?As?String,?destFile?As?String) ?

If?Not?File.Exists(sourceFile)?Then ?

Throw?New?FileNotFoundException("指定的文件路徑不存在！",?sourceFile) ?

End?If ?

Dim?btKey?As?Byte()?=?Encoding.Default.GetBytes(key) ?

Dim?btIV?As?Byte()?=?Encoding.Default.GetBytes(iv) ?

Dim?des?As?New?DESCryptoServiceProvider() ?

Dim?btFile?As?Byte()?=?File.ReadAllBytes(sourceFile) ?

Dim?fs?As?New?FileStream(destFile,?FileMode.Create,?FileAccess.Write) ?

Try ?

Try ?

Dim?cs?As?New?CryptoStream(fs,?des.CreateDecryptor(btKey,?btIV),?CryptoStreamMode.Write) ?

Try ?

cs.Write(btFile,?0,?btFile.Length) ?

cs.FlushFinalBlock() ?

Finally ?

cs.Dispose() ?

End?Try ?

Catch ?

Finally ?

fs.Close() ?

End?Try ?

Finally ?

fs.Dispose() ?

End?Try ?

End?Sub?'DecryptFile ?

'/?summary?

'/?對文件內(nèi)容進行DES解密，加密后覆蓋掉原來的文件 ?

'/?/summary?

'/?param?name="sourceFile"待解密的文件的絕對路徑/param?

Overloads?Public?Sub?DecryptFile(sourceFile?As?String) ?

DecryptFile(sourceFile,?sourceFile) ?

End?Sub?'DecryptFile ?

End?Class?'DES ?

End?Namespace?'ZU14?

對文本文件加密

Dim?des?As?New?ZU14.DES() ?

des.IV?=?"abcd哈哈笑"?

des.Key?=?"必須八位"?

'加密

des.EncryptFile("d:\a.txt",?"d:\b.txt") ?

'解密

des.DecryptFile("d:\b.txt")

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(diào)試通過