vb.net加密文本,vb加密文件

用VB.net編寫一個(gè)加密解密軟件

"采用DES算法"這個(gè)說(shuō)法不明確，首先是使用多少位的DES進(jìn)行加密，通常是128位或192位，其次是，要先把主密鑰轉(zhuǎn)化成散列，才能供DES進(jìn)行加密，轉(zhuǎn)化的方法是什么沒(méi)有明確，通常是md5，所以有的銀行卡說(shuō)是128位md5 3DS就是指用md5轉(zhuǎn)換主密鑰散列，用DES進(jìn)行加密，但是DES本身是64位（包含校驗(yàn)碼），2DES是128位，3DES是192位，但是沒(méi)有2DES的叫法，所以128位、192位統(tǒng)稱3DES

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要完整的md5+3DS實(shí)例，需要100分以上，要不到我的空間中查找相關(guān)的文章

vb.net中實(shí)現(xiàn)rsa加密解密 急！急！

我覺(jué)得你的并不是RSA加密解密算法。

在.net的有一個(gè)System.Security.Cryptography的命名空間，里面有一RSACryptoServiceProvider的類用來(lái)對(duì)byte進(jìn)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);

}

求VB.net使用密鑰的可逆文本加密算法代碼 編程新手，若有講解可加分

先實(shí)例化該類

Dim wrapper As New ClassLibrary1.Simple3Des("你的密鑰")

然后

Dim cipherText As String = wrapper.EncryptData("要加密的文本")

或

Dim cipherText As String = wrapper.DecryptData("要揭秘的文本")

求VB.NET生成TET文件的加密方法

使用加密方式存儲(chǔ)即可實(shí)現(xiàn)別人無(wú)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

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(zhǎng)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(zhǎng)的字符串 ?

'/?/summary?

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

Get ?

Return?key ?

End?Get ?

Set ?

key?=?value?

End?Set ?

End?Property ?

'/?summary?

'/?對(duì)字符串進(jìn)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(duì)DES加密后的字符串進(jìn)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(duì)文件內(nèi)容進(jìn)行DES加密 ?

'/?/summary?

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

'/?param?name="destFile"加密后的文件保存的絕對(duì)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(duì)文件內(nèi)容進(jìn)行DES加密，加密后覆蓋掉原來(lái)的文件 ?

'/?/summary?

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

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

EncryptFile(sourceFile,?sourceFile) ?

End?Sub?'EncryptFile ?

'/?summary?

'/?對(duì)文件內(nèi)容進(jìn)行DES解密 ?

'/?/summary?

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

'/?param?name="destFile"解密后的文件保存的絕對(duì)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(duì)文件內(nèi)容進(jìn)行DES解密，加密后覆蓋掉原來(lái)的文件 ?

'/?/summary?

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

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

DecryptFile(sourceFile,?sourceFile) ?

End?Sub?'DecryptFile ?

End?Class?'DES ?

End?Namespace?'ZU14?

對(duì)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")

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