C#DES加密，JavaDES解密，另轉C#和Java實現Des完整程式碼
阿新 • • 發佈：2019-01-27
<span style="font-family: Arial, Helvetica, sans-serif;">今天，由於開發需要C#做DES加密，Java做DES解密，在實現時有這樣一個問題：C#做DES有加密向量IV，Java常見方式是沒有的。在解密時需要使用</span>Cipher cipher = Cipher.getInstance ( "DES/CBC/PKCS5Padding" ); cipher.init(Cipher. DECRYPT_MODE , SecretKey mySecretKey , IvParameterSpec myIV);
而不是
Cipher cipher = Cipher.getInstance ( "DES" );
cipher.init(Cipher. DECRYPT_MODE , Key key );1、Java實現DES加解密（相容C#DES加解密）
package decryption; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.security.Key; import javax.crypto.Cipher; import javax.crypto.CipherInputStream; import javax.crypto.CipherOutputStream; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import javax.crypto.spec.IvParameterSpec; public class Decryption { Key key ; SecretKey mySecretKey; IvParameterSpec myIV; public Decryption() { } public Decryption(String str) { setKey(str); // 生成密匙 } public Key getKey() { return key ; } public void setKey(Key key) { this . key = key; } /** * 根據引數生成 KEY */ public void setKey(String strKey) { // try { // KeyGenerator _generator = KeyGenerator.getInstance ( "DES" ); // _generator.init( new SecureRandom(strKey.getBytes())); // this . key = _generator.generateKey(); // _generator = null ; // } catch (Exception e) { // throw new RuntimeException( // "Error initializing SqlMap class. Cause: " + e); // } try { DESKeySpec dks = new DESKeySpec(strKey.getBytes("UTF-8")); SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES"); SecretKey securekey = keyFactory.generateSecret(dks); this.mySecretKey=securekey; byte[] Keys =strKey.getBytes(); IvParameterSpec iv = new IvParameterSpec(Keys); this.myIV=iv; } catch (Exception e) { throw new RuntimeException(e); } } /** * 檔案 file 進行加密並儲存目標檔案 destFile 中 * * @param file * 要加密的檔案 如 c:/test/srcFile.txt * @param destFile * 加密後存放的檔名 如 c:/ 加密後文件 .txt */ public void encryptFile(String file, String destFile) throws Exception { //Cipher cipher = Cipher.getInstance ( "DES" ); // cipher.init(Cipher.ENCRYPT_MODE, getKey()); // cipher.init(Cipher. ENCRYPT_MODE , this . key ); Cipher cipher = Cipher.getInstance ( "DES/CBC/PKCS5Padding" ); cipher.init(Cipher. ENCRYPT_MODE , mySecretKey ,myIV); InputStream is = new FileInputStream(file); OutputStream out = new FileOutputStream(destFile); CipherInputStream cis = new CipherInputStream(is, cipher); byte [] buffer = new byte [1024];//原檔案長度和緩衝區大小沒有關係 int r; while ((r = cis.read(buffer)) > 0) { out.write(buffer, 0, r); } cis.close(); is.close(); out.close(); } /** * 檔案採用 DES 演算法解密檔案 * * @param file * 已加密的檔案 如 c:/ 加密後文件 .txt * * @param destFile * 解密後存放的檔名 如 c:/ test/ 解密後文件 .txt */ public void decryptFile(String file, String dest) throws Exception { // Cipher cipher = Cipher.getInstance ( "DES" ); // cipher.init(Cipher. DECRYPT_MODE , this . key ); Cipher cipher = Cipher.getInstance ( "DES/CBC/PKCS5Padding" ); cipher.init(Cipher. DECRYPT_MODE , mySecretKey ,myIV); InputStream is = new FileInputStream(file); OutputStream out = new FileOutputStream(dest); CipherOutputStream cos = new CipherOutputStream(out, cipher); byte [] buffer = new byte [1024];//原檔案長度和緩衝區大小沒有關係 int r; while ((r = is.read(buffer)) >= 0) { cos.write(buffer, 0, r); } cos.close(); out.close(); is.close(); } public static void main(String[] args) throws Exception { Decryption des = new Decryption( "12345678" ); //des.encryptFile("C:/Users/user/Desktop/TS1402883420_F1_D16_6_T9_50_20.mp4","C:/Users/user/Desktop/456.mp4"); //des.decryptFile("C:/Users/user/Desktop/456.mp4","C:/Users/user/Desktop/789.mp4"); des.decryptFile("C:/Users/user/Desktop/CSharpEncrypt.mp4","C:/Users/user/Desktop/xyz.mp4"); } }
2、C#DES加解密
using System.Security.Cryptography; using System.IO; using System.Text; using System; namespace DES_CSharp { public class Security { //預設金鑰向量 private static byte[] Keys = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF }; /// <summary> /// DES加密字串 /// </summary> /// <param name="encryptString">待加密的字串</param> /// <param name="encryptKey">加密金鑰,要求為8位</param> /// <returns>加密成功返回加密後的字串，失敗返回源串</returns> public static string EncryptDES(string encryptString, string encryptKey) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 8)); byte[] rgbIV = Keys; byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString); DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Convert.ToBase64String(mStream.ToArray()); } catch { return encryptString; } } /// <summary> /// DES解密字串 /// </summary> /// <param name="decryptString">待解密的字串</param> /// <param name="decryptKey">解密金鑰,要求為8位,和加密金鑰相同</param> /// <returns>解密成功返回解密後的字串，失敗返源串</returns> public static string DecryptDES(string decryptString, string decryptKey) { try { byte[] rgbKey = Encoding.UTF8.GetBytes(decryptKey); byte[] rgbIV = Keys; byte[] inputByteArray = Convert.FromBase64String(decryptString); DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider(); MemoryStream mStream = new MemoryStream(); CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write); cStream.Write(inputByteArray, 0, inputByteArray.Length); cStream.FlushFinalBlock(); return Encoding.UTF8.GetString(mStream.ToArray()); } catch { return decryptString; } } #region 加密方法 圖片加密 /// <summary> /// 圖片加密 /// </summary> /// <param name="filePath">原始檔</param> /// <param name="savePath">儲存為檔名稱</param> /// <param name="keyStr">金鑰，要求為8位</param> public static void EncryptFile(string filePath, string savePath, string keyStr) { //通過des加密 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); //通過流開啟檔案 FileStream fs = File.OpenRead(filePath); //獲取檔案二進位制字元 byte[] inputByteArray = new byte[fs.Length]; //讀流檔案 fs.Read(inputByteArray, 0, (int)fs.Length); //關閉流 fs.Close(); //獲得加密字串二進位制字元 byte[] keyByteArray = Encoding.Default.GetBytes(keyStr); ////計算指定位元組組指定區域雜湊值 //SHA1 ha = new SHA1Managed(); //byte[] hb = ha.ComputeHash(keyByteArray); ////加密金鑰陣列 //byte[] sKey = new byte[8]; ////加密變數 //byte[] sIV = new byte[8]; //for (int i = 0; i < 8; i++) // sKey[i] = hb[i]; //for (int i = 8; i < 16; i++) // sIV[i - 8] = hb[i]; byte[] sKey = keyByteArray; byte[] sIV = keyByteArray; //獲取加密金鑰 des.Key = sKey; //設定加密初始化向量 des.IV = sIV; MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); fs = File.OpenWrite(savePath); foreach (byte b in ms.ToArray()) { fs.WriteByte(b); } fs.Close(); cs.Close(); ms.Close(); } #endregion #region 解密方法 圖片解密 /// <summary> /// 圖片解密 /// </summary> /// <param name="filePath">原始檔</param> /// <param name="savePath">儲存檔案</param> /// <param name="keyStr">金鑰，要求為8位</param> public static void DecryptFile(string filePath, string savePath, string keyStr) { //通過des解密 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); //通過流讀取檔案 FileStream fs = File.OpenRead(filePath); //獲取檔案二進位制字元 byte[] inputByteArray = new byte[fs.Length]; //讀取流檔案 fs.Read(inputByteArray, 0, (int)fs.Length); //關閉流 fs.Close(); //金鑰陣列 byte[] keyByteArray = Encoding.Default.GetBytes(keyStr); ////定義雜湊變數 //SHA1 ha = new SHA1Managed(); ////計算指定位元組組指定區域雜湊值 //byte[] hb = ha.ComputeHash(keyByteArray); ////加密金鑰陣列 //byte[] sKey = new byte[8]; ////加密變數 //byte[] sIV = new byte[8]; //for (int i = 0; i < 8; i++) // sKey[i] = hb[i]; //for (int i = 8; i < 16; i++) // sIV[i - 8] = hb[i]; byte[] sKey = keyByteArray; byte[] sIV = keyByteArray; //獲取加密金鑰 des.Key = sKey; //加密變數 des.IV = sIV; MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); fs = File.OpenWrite(savePath); foreach (byte b in ms.ToArray()) { fs.WriteByte(b); } fs.Close(); cs.Close(); ms.Close(); } #endregion #region 加密方法 圖片加密 /// <summary> /// 圖片加密 /// </summary> /// <param name="filePath">加密檔案位元組陣列</param> /// <param name="savePath">儲存為檔名稱</param> /// <param name="keyStr">金鑰，要求為8位</param> public static void EncryptFile(byte[] inputByteArray, string savePath, string keyStr) { try { //通過des加密 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); //獲得加密字串二進位制字元 byte[] keyByteArray = Encoding.Default.GetBytes(keyStr); //計算指定位元組組指定區域雜湊值 SHA1 ha = new SHA1Managed(); byte[] hb = ha.ComputeHash(keyByteArray); //加密金鑰陣列 byte[] sKey = new byte[8]; //加密變數 byte[] sIV = new byte[8]; for (int i = 0; i < 8; i++) sKey[i] = hb[i]; for (int i = 8; i < 16; i++) sIV[i - 8] = hb[i]; //獲取加密金鑰 des.Key = sKey; //設定加密初始化向量 des.IV = sIV; MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); FileStream fs = File.OpenWrite(savePath); foreach (byte b in ms.ToArray()) { fs.WriteByte(b); } fs.Close(); cs.Close(); ms.Close(); } catch (Exception ex) { System.Diagnostics.Trace.Write(ex.Message); } } #endregion #region 解密方法 圖片解密 /// <summary> /// 圖片解密 /// </summary> /// <param name="filePath">原始檔</param> /// <param name="savePath">儲存檔案</param> /// <param name="keyStr">金鑰，要求為8位</param> /// <returns>返回解密後的檔案位元組陣列</returns> public static byte[] DecryptFile(string filePath, string keyStr) { try { //通過des解密 DESCryptoServiceProvider des = new DESCryptoServiceProvider(); //通過流讀取檔案 FileStream fs = File.OpenRead(filePath); //獲取檔案二進位制字元 byte[] inputByteArray = new byte[fs.Length]; //讀取流檔案 fs.Read(inputByteArray, 0, (int)fs.Length); //關閉流 fs.Close(); //金鑰陣列 byte[] keyByteArray = Encoding.Default.GetBytes(keyStr); //定義雜湊變數 SHA1 ha = new SHA1Managed(); //計算指定位元組組指定區域雜湊值 byte[] hb = ha.ComputeHash(keyByteArray); //加密金鑰陣列 byte[] sKey = new byte[8]; //加密變數 byte[] sIV = new byte[8]; for (int i = 0; i < 8; i++) sKey[i] = hb[i]; for (int i = 8; i < 16; i++) sIV[i - 8] = hb[i]; //獲取加密金鑰 des.Key = sKey; //加密變數 des.IV = sIV; MemoryStream ms = new MemoryStream(); CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write); cs.Write(inputByteArray, 0, inputByteArray.Length); cs.FlushFinalBlock(); byte[] b = ms.ToArray(); cs.Close(); ms.Close(); return b; } catch (Exception ex) { System.Diagnostics.Trace.Write(ex.Message); return null; } } #endregion } }
3、JavaDES加解密
package test;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.Key;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.KeyGenerator;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class DESUtil {
Key key ;
public DESUtil() {
}
public DESUtil(String str) {
setKey(str); // 生成密匙
}
public Key getKey() {
return key ;
}
public void setKey(Key key) {
this . key = key;
}
/**
* 根據引數生成 KEY
*/
public void setKey(String strKey) {
try {
KeyGenerator _generator = KeyGenerator.getInstance ( "DES" );
_generator.init( new SecureRandom(strKey.getBytes()));
this . key = _generator.generateKey();
_generator = null ;
} catch (Exception e) {
throw new RuntimeException(
"Error initializing SqlMap class. Cause: " + e);
}
}
/**
* 加密 String 明文輸入 ,String 密文輸出
*/
public String encryptStr(String strMing) {
byte [] byteMi = null ;
byte [] byteMing = null ;
String strMi = "" ;
BASE64Encoder base64en = new BASE64Encoder();
try {
byteMing = strMing.getBytes( "UTF8" );
byteMi = this .encryptByte(byteMing);
strMi = base64en.encode(byteMi);
} catch (Exception e) {
throw new RuntimeException(
"Error initializing SqlMap class. Cause: " + e);
} finally {
base64en = null ;
byteMing = null ;
byteMi = null ;
}
return strMi;
}
/**
* 解密 以 String 密文輸入 ,String 明文輸出
*
* @param strMi
* @return
*/
public String decryptStr(String strMi) {
BASE64Decoder base64De = new BASE64Decoder();
byte [] byteMing = null ;
byte [] byteMi = null ;
String strMing = "" ;
try {
byteMi = base64De.decodeBuffer(strMi);
byteMing = this .decryptByte(byteMi);
strMing = new String(byteMing, "UTF8" );
} catch (Exception e) {
throw new RuntimeException(
"Error initializing SqlMap class. Cause: " + e);
} finally {
base64De = null ;
byteMing = null ;
byteMi = null ;
}
return strMing;
}
/**
* 加密以 byte[] 明文輸入 ,byte[] 密文輸出
*
* @param byteS
* @return
*/
private byte [] encryptByte( byte [] byteS) {
byte [] byteFina = null ;
Cipher cipher;
try {
cipher = Cipher.getInstance ( "DES" );
cipher.init(Cipher. ENCRYPT_MODE , key );
byteFina = cipher.doFinal(byteS);
} catch (Exception e) {
throw new RuntimeException(
"Error initializing SqlMap class. Cause: " + e);
} finally {
cipher = null ;
}
return byteFina;
}
/**
* 解密以 byte[] 密文輸入 , 以 byte[] 明文輸出
*
* @param byteD
* @return
*/
private byte [] decryptByte( byte [] byteD) {
Cipher cipher;
byte [] byteFina = null ;
try {
cipher = Cipher.getInstance ( "DES" );
cipher.init(Cipher. DECRYPT_MODE , key );
byteFina = cipher.doFinal(byteD);
} catch (Exception e) {
throw new RuntimeException(
"Error initializing SqlMap class. Cause: " + e);
} finally {
cipher = null ;
}
return byteFina;
}
/**
* 檔案 file 進行加密並儲存目標檔案 destFile 中
*
* @param file
* 要加密的檔案 如 c:/test/srcFile.txt
* @param destFile
* 加密後存放的檔名 如 c:/ 加密後文件 .txt
*/
public void encryptFile(String file, String destFile) throws Exception {
Cipher cipher = Cipher.getInstance ( "DES" );
// cipher.init(Cipher.ENCRYPT_MODE, getKey());
cipher.init(Cipher. ENCRYPT_MODE , this . key );
InputStream is = new FileInputStream(file);
OutputStream out = new FileOutputStream(destFile);
CipherInputStream cis = new CipherInputStream(is, cipher);
byte [] buffer = new byte [1024];
int r;
while ((r = cis.read(buffer)) > 0) {
out.write(buffer, 0, r);
}
cis.close();
is.close();
out.close();
}
/**
* 檔案採用 DES 演算法解密檔案
*
* @param file
* 已加密的檔案 如 c:/ 加密後文件 .txt *
* @param destFile
* 解密後存放的檔名 如 c:/ test/ 解密後文件 .txt
*/
public void decryptFile(String file, String dest) throws Exception {
Cipher cipher = Cipher.getInstance ( "DES" );
cipher.init(Cipher. DECRYPT_MODE , this . key );
InputStream is = new FileInputStream(file);
OutputStream out = new FileOutputStream(dest);
CipherOutputStream cos = new CipherOutputStream(out, cipher);
byte [] buffer = new byte [1024];
int r;
while ((r = is.read(buffer)) >= 0) {
cos.write(buffer, 0, r);
}
cos.close();
out.close();
is.close();
}
public static void main(String[] args) throws Exception {
DESUtil des = new DESUtil( "1234567" );
// DES 加密檔案
// des.encryptFile("G:/test.doc", "G:/ 加密 test.doc");
// DES 解密檔案
// des.decryptFile("G:/ 加密 test.doc", "G:/ 解密 test.doc");
String str1 = " 要加密的字串 test" ;
// DES 加密字串
String str2 = des.encryptStr(str1);
// DES 解密字串
String deStr = des.decryptStr(str2);
System. out .println( " 加密前： " + str1);
System. out .println( " 加密後： " + str2);
System. out .println( " 解密後： " + deStr);
}
}