Android DES加密的CBC方式加密解密和ECB模式加密解密

Android DES加密的CBC模式加密解密和ECB模式加密解密

DES加密共有四种模式：电子密码本模式（ECB）、加密分组链接模式（CBC）、加密反馈模式（CFB）和输出反馈模式（OFB）。

CBC模式加密：

import java.security.Key;import java.security.spec.AlgorithmParameterSpec;import javax.crypto.Cipher;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import javax.crypto.spec.IvParameterSpec;import com.sun.org.apache.xml.internal.security.utils.Base64;
public class DesCbcUtil {public static final String ALGORITHM_DES = "DES/CBC/PKCS5Padding";
/*** 加密* @param data 待加密字符串* @param key 加密私钥，长度不能够小于8位* @return 加密后的字节数组，一般结合Base64编码使用* @throws CryptException 异常*/public static String encode(String key, String data) throws Exception {return encode(key, data.getBytes());}
/*** 加密* @param data 待加密字符串* @param key 加密私钥，长度不能够小于8位* @return 加密后的字节数组，一般结合Base64编码使用* @throws CryptException 异常*/public static String encode(String key, byte[] data) throws Exception {try { byte[] ivbyte = { 1, 2, 3, 4, 5, 6, 7, 8 }; DESKeySpec dks = new DESKeySpec(key.getBytes());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");// key的长度不能够小于8位字节Key secretKey = keyFactory.generateSecret(dks);Cipher cipher = Cipher.getInstance(ALGORITHM_DES);IvParameterSpec iv = new IvParameterSpec(ivbyte);AlgorithmParameterSpec paramSpec = iv;cipher.init(Cipher.ENCRYPT_MODE, secretKey, paramSpec);
byte[] bytes = cipher.doFinal(data);
return Base64.encode(bytes);} catch (Exception e) {throw new Exception(e);}}
/*** 解密* @param data 待解密字符串* @param key 解密私钥，长度不能够小于8位* @return 解密后的字节数组* @throws Exception 异常*/public static byte[] decode(String key, byte[] data) throws Exception {try {DESKeySpec dks = new DESKeySpec(key.getBytes());SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");// key的长度不能够小于8位字节Key secretKey = keyFactory.generateSecret(dks);Cipher cipher = Cipher.getInstance(ALGORITHM_DES);IvParameterSpec iv = new IvParameterSpec("12345678".getBytes());AlgorithmParameterSpec paramSpec = iv;cipher.init(Cipher.DECRYPT_MODE, secretKey, paramSpec);return cipher.doFinal(data);} catch (Exception e) {throw new Exception(e);}}
/*** 获取编码后的值* * @param key* @param data* @return* @throws Exception*/public static String decodeValue(String key, String data) {byte[] datas;String value = null;try {if (System.getProperty("os.name") != null&& (System.getProperty("os.name").equalsIgnoreCase("sunos") || System.getProperty("os.name").equalsIgnoreCase("linux"))) {datas = decode(key, Base64.decode(data));} else {datas = decode(key, Base64.decode(data));}
value = new String(datas);} catch (Exception e) {value = "";}return value;}
}

ECB模式加密：

import javax.crypto.Cipher;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import android.util.Base64;
public class DesEcbUtil {
public static final String ALGORITHM_DES = "DES/ECB/PKCS5Padding";
/*** 加密* @param data 待加密字符串* @param key 加密私钥，长度不能够小于8位* @return 加密后的字节数组，一般结合Base64编码使用* @throws CryptException  异常*/public static String encode(String key, String data) throws Exception {return encode(key, data.getBytes());}
/*** 加密* @param data 待加密字符串* @param key 加密私钥，长度不能够小于8位* @return 加密后的字节数组，一般结合Base64编码使用* @throws CryptException 异常*/public static String encode(String key, byte[] data) throws Exception {try {DESKeySpec dks = new DESKeySpec(key.getBytes());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");// key的长度不能够小于8位字节Key secretKey = keyFactory.generateSecret(dks);Cipher cipher = Cipher.getInstance(ALGORITHM_DES);cipher.init(Cipher.ENCRYPT_MODE, secretKey);
byte[] bytes = cipher.doFinal(data);
return Base64.encodeToString(bytes, 3);} catch (Exception e) {throw new Exception(e);}}
/*** 解密* @param data 待解密字符串* @param key 解密私钥，长度不能够小于8位* @return 解密后的字节数组* @throws Exception 异常*/public static byte[] decode(String key, byte[] data) throws Exception {try {DESKeySpec dks = new DESKeySpec(key.getBytes());SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");// key的长度不能够小于8位字节Key secretKey = keyFactory.generateSecret(dks);Cipher cipher = Cipher.getInstance(ALGORITHM_DES);cipher.init(Cipher.DECRYPT_MODE, secretKey);return cipher.doFinal(data);} catch (Exception e) {throw new Exception(e);}}
/*** 获取编码后的值* * @param key* @param data* @return* @throws Exception*/public static String decodeValue(String key, String data) {byte[] datas;String value = null;try {if (System.getProperty("os.name") != null&& (System.getProperty("os.name").equalsIgnoreCase("sunos") || System.getProperty("os.name").equalsIgnoreCase("linux"))) {datas = decode(key, Base64.decode(data, 3));} else {datas = decode(key, Base64.decode(data, 3));}
value = new String(datas);} catch (Exception e) {value = "";}return value;}}

测试（CBC模式的测试和ECB的一样）：try {
//待加密内容url
String str = "";

String pwdKey = "moshapp"; 
String pwdKeyMD5 = MD5Util.encode(pwdKey);
System.out.println("pwdKeyMD5：" + pwdKeyMD5);
String encodeStr = DesEcbUtil.encode(pwdKeyMD5, str);
String decodeStr = DesEcbUtil.decodeValue(pwdKeyMD5, encodeStr);
System.out.println("加密前的字符串：" + str);
System.out.println("加密后的字符串：" + encodeStr);
System.out.println("解密后的字符串：" + decodeStr);
// URL转义
final String encodedURL = URLEncoder.encode(encodeStr, "UTF-8");
// URL urlStr = new URL(encodedURL);
System.out.println("转义后的字符串：" + encodedURL);
} catch (Exception e) {
e.printStackTrace();
}

参考：

http://blog.csdn.net/randyjiawenjie/article/details/6617225

Android平台和java平台 DES加密解密互通程序及其不能互通的原因

http://hi.baidu.com/hpyfei/item/ca990cff5ce7b217ff358263 

Android与PHP互通的DES加密解密

http://www.linuxidc.com/Linux/2011-08/41866.htm

Android客户端与服务器端通过DES加密认证

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