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C#封装的DES与MD5加密示例代码

using System;

using System.IO;

using System.Text;

using System.Security.Cryptography;

namespace TestWeb.App_Code

{

/// <summary>

/// DESEncryptor 的摘要说明。

/// </summary>

public class DESEncryptor

{

public DESEncryptor()

{

// TODO: 在此处添加构造函数逻辑

}

私有成员

公共属性

DES加密字符串 #region DES加密字符串

/**/ /// <summary>

/// 加密字符串

/// 注意:密钥必须为８位

/// </summary>

/// <param name="strText"> 字符串 </param>

/// <param name="encryptKey"> 密钥 </param>

public void DesEncrypt()

{

byte [] byKey = null ;

byte [] IV = { 0x12 , 0x34 , 0x56 , 0x78 , 0x90 , 0xAB , 0xCD , 0xEF } ;

try

{

byKey = System.Text.Encoding.UTF8.GetBytes( this .encryptKey.Substring( 0 , 8 ));

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

byte [] inputByteArray = Encoding.UTF8.GetBytes( this .inputString);

MemoryStream ms = new MemoryStream();

CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);

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

cs.FlushFinalBlock();

this .outString = Convert.ToBase64String(ms.ToArray());

}

catch (System.Exception error)

{

this .noteMessage = error.Message;

}

#endregion

DES解密字符串 #region DES解密字符串

/**/ /// <summary>

/// 解密字符串

/// </summary>

/// <param name="this.inputString"> 加了密的字符串 </param>

/// <param name="decryptKey"> 密钥 </param>

public void DesDecrypt()

{

byte [] byKey = null ;

byte [] IV = { 0x12 , 0x34 , 0x56 , 0x78 , 0x90 , 0xAB , 0xCD , 0xEF } ;

byte [] inputByteArray = new Byte[ this .inputString.Length];

try

{

byKey = System.Text.Encoding.UTF8.GetBytes(decryptKey.Substring( 0 , 8 ));

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

inputByteArray = Convert.FromBase64String( this .inputString);

MemoryStream ms = new MemoryStream();

CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);

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

cs.FlushFinalBlock();

System.Text.Encoding encoding = new System.Text.UTF8Encoding();

this .outString = encoding.GetString(ms.ToArray());

}

catch (System.Exception error)

{

this .noteMessage = error.Message;

}

#endregion

DES加密文件 #region DES加密文件

/**/ /// <summary>

/// DES加密文件

/// </summary>

/// <param name="this.inputFilePath"> 源文件路径 </param>

/// <param name="this.outFilePath"> 输出文件路径 </param>

/// <param name="encryptKey"> 密钥 </param>

public void FileDesEncrypt()

{

byte [] byKey = null ;

byte [] IV = { 0x12 , 0x34 , 0x56 , 0x78 , 0x90 , 0xAB , 0xCD , 0xEF } ;

try

{

byKey = System.Text.Encoding.UTF8.GetBytes( this .encryptKey.Substring( 0 , 8 ));

FileStream fin = new FileStream( this .inputFilePath, FileMode.Open, FileAccess.Read);

FileStream fout = new FileStream( this .outFilePath, FileMode.OpenOrCreate, FileAccess.Write);

fout.SetLength( 0 );

// Create variables to help with read and write.

byte [] bin = new byte [ 100 ]; // This is intermediate storage for the encryption.

long rdlen = 0 ; // This is the total number of bytes written.

long totlen = fin.Length; // This is the total length of the input file.

int len; // This is the number of bytes to be written at a time.

DES des = new DESCryptoServiceProvider();

CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);

// Read from the input file, then encrypt and write to the output file.

while (rdlen < totlen)

{

len = fin.Read(bin, 0 , 100 );

encStream.Write(bin, 0 , len);

rdlen = rdlen + len;

}

encStream.Close();

fout.Close();

fin.Close();

}

catch (System.Exception error)

{

this .noteMessage = error.Message.ToString();

}

#endregion

DES解密文件 #region DES解密文件

/**/ /// <summary>

/// 解密文件

/// </summary>

/// <param name="this.inputFilePath"> 加密了的文件路径 </param>

/// <param name="this.outFilePath"> 输出文件路径 </param>

/// <param name="decryptKey"> 密钥 </param>

public void FileDesDecrypt()

{

byte [] byKey = null ;

byte [] IV = { 0x12 , 0x34 , 0x56 , 0x78 , 0x90 , 0xAB , 0xCD , 0xEF } ;

try

{

byKey = System.Text.Encoding.UTF8.GetBytes(decryptKey.Substring( 0 , 8 ));

FileStream fin = new FileStream( this .inputFilePath, FileMode.Open, FileAccess.Read) ;

FileStream fout = new FileStream( this .outFilePath, FileMode.OpenOrCreate, FileAccess.Write);

fout.SetLength( 0 );

// Create variables to help with read and write.

byte [] bin = new byte [ 100 ]; // This is intermediate storage for the encryption.

long rdlen = 0 ; // This is the total number of bytes written.

long totlen = fin.Length; // This is the total length of the input file.

int len; // This is the number of bytes to be written at a time.

DES des = new DESCryptoServiceProvider();

CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);

// Read from the input file, then encrypt and write to the output file.

while (rdlen < totlen)

{

len = fin.Read(bin, 0 , 100 );

encStream.Write(bin, 0 , len);

rdlen = rdlen + len;

}

encStream.Close();

fout.Close();

fin.Close();

}

catch (System.Exception error)

{

this .noteMessage = error.Message.ToString();

}

#endregion

MD5

}

posted on 2007-01-04 00:10 KiMoGiGi 阅读(515) 评论(0) 编辑收藏引用所属分类: C# / Winforms

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