Java源碼：

import java.security.Security; import javax.crypto.Cipher; import j<愛尬聊_百科詞條>avax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec;public class ThreeDES {private static final String Algorithm = "DESede"; //定義 加密算法,可用 DES,DESede,Blowfish//keybyte為加密密鑰，長度為24字節 //src為被加密的數據緩沖區（源） public static byte[] encryptMode(byte[] keybyte, byte[] src) {try { //生成密鑰 SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);//加密 Cipher c1 = Cipher.getInstance(Algorithm); c1.init(Cipher.ENCRYPT_MODE, deskey); return c1.doFinal(src); } catch (java.security.NoSuchAlgorithmException e1) { e1.printStackTrace(); } catch (javax.crypto.NoSuchPaddingException e2) { e2.printStackTrace(); } catch (java.lang.Exception e3) { e3.printStackTrace(); } return null; }//keybyte為加密密鑰，長度為24字節 //src為加密后的緩沖區 public static byte[] decryptMode(byte[] keybyte, byte[] src) { try { //生成密鑰 SecretKey deskey = new SecretKeySpec(keybyte, Algorithm);//解密 Cipher c1 = Cipher.getInstance(Algorithm); c1.init(Cipher.DECRYPT_MODE, deskey); return c1.doFinal(src); } catch (java.security.NoSuchAlgorithmException e1) { e1.printStackTrace(); } catch (javax.crypto.NoSuchPaddingException e2) { e2.printStackTrace(); } catch (java.lang.Exception e3) { e3.printStackTrace(); } return null; }//轉換成十六進制字符串 public static String byte2hex(byte[] b) { String hs=""; String stmp="";for (int n=0;n<b.length;n++) { stmp=(java.lang.Integer.toHexString(b[n] & 0XFF)); if (stmp.length()==1) hs=hs+"0"+stmp; else hs=hs+stmp; if (n<b.length-1)hs=hs+":"; } return hs.toUpperCase(); }public static void main(String[] args) { //添加新安全算法,如果用JCE就要把它添加進去 Security.addProvider(new com.sun.crypto.provider.SunJCE());final byte[] keyBytes = {0x11, 0x22, 0x4F, 0x58, (byte)0x88, 0x10, 0x40, 0x38, 0x28, 0x25, 0x79, 0x51, (byte)0xCB, (byte)0xDD, 0x55, 0x66, 0x77, 0x29, 0x74, (byte)0x98, 0x30, 0x40, 0x36, (byte)0xE2};//24字節的密鑰 String szSrc = "This is a 3DES test. 測試";System.out.println("加密前的字符串:" + szSrc);byte[] encoded = encryptMode(keyBytes, szSrc.getBytes()); System.out.println("加密后的字符串:" + new String(encoded));byte[] srcBytes = decryptMode(keyBytes, encoded); System.out.println("解密后的字符串:" + (new String(srcBytes))); }}

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唐爽 20小時前

已解決 自問自答

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