标签:安卓 ini bytes org set stringbu ptr data utf-8
先前一直在做安卓,最近要开发iPhone客户端,这其中遇到的最让人纠结的要属Java、Android和iPhone三个平台加解密不一致的问题。因为手机端后台通常是用JAVA开发的Web Service,Android和iPhone客户端调用同样的Web Service接口,为了数据安全考虑,要对数据进行加密。头疼的问题就来了,很难编写出一套加密程序,在3个平台间加解密的结果一致,总不能为Android和iPhone两个客户端各写一套Web Service接口吧?我相信还会有很多朋友为此困惑,在此分享一套3DES加密程序,能够实现Java、Android和iPhone三个平台加解密一致。
首先是JAVA端的加密工具类,它同样适用于Android端,无需任何修改,即可保证Java与Android端的加解密一致,并且中文不会乱码。
- package org.liuyq.des3;
-
- import java.security.Key;
-
- import javax.crypto.Cipher;
- import javax.crypto.SecretKeyFactory;
- import javax.crypto.spec.DESedeKeySpec;
- import javax.crypto.spec.IvParameterSpec;
-
- public class Des3 {
-
- private final static String secretKey = "liuyunqiang@lx100$#365#$";
-
- private final static String iv = "01234567";
-
- private final static String encoding = "utf-8";
-
-
- public static String encode(String plainText) throws Exception {
- Key deskey = null;
- DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());
- SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
- deskey = keyfactory.generateSecret(spec);
-
- Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
- IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
- cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);
- byte[] encryptData = cipher.doFinal(plainText.getBytes(encoding));
- return Base64.encode(encryptData);
- }
-
-
- public static String decode(String encryptText) throws Exception {
- Key deskey = null;
- DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());
- SecretKeyFactory keyfactory = SecretKeyFactory.getInstance("desede");
- deskey = keyfactory.generateSecret(spec);
- Cipher cipher = Cipher.getInstance("desede/CBC/PKCS5Padding");
- IvParameterSpec ips = new IvParameterSpec(iv.getBytes());
- cipher.init(Cipher.DECRYPT_MODE, deskey, ips);
-
- byte[] decryptData = cipher.doFinal(Base64.decode(encryptText));
-
- return new String(decryptData, encoding);
- }
- }
上面的加密工具类会使用到Base64这个类,该类的源代码如下:
接下来是iPhone端的加密程序,当然是用Ojbective-C写的3DES加密程序,源代码如下:
- //
- // DES3Util.h
- // lx100-gz
- //
- // Created by 柳峰 on 12-10-10.
- // Copyright 2012 http://blog.csdn.net/lyq8479. All rights reserved.
- //
-
- #import <Foundation/Foundation.h>
-
-
- @interface DES3Util : NSObject {
-
- }
-
- // 加密方法
- + (NSString*)encrypt:(NSString*)plainText;
-
- // 解密方法
- + (NSString*)decrypt:(NSString*)encryptText;
-
- @end
- //
- // DES3Util.m
- // lx100-gz
- //
- // Created by 柳峰 on 12-9-17.
- // Copyright 2012 http://blog.csdn.net/lyq8479. All rights reserved.
- //
-
- #import "DES3Util.h"
- #import <CommonCrypto/CommonCryptor.h>
- #import "GTMBase64.h"
-
- #define gkey @"liuyunqiang@lx100$#365#$"
- #define gIv @"01234567"
-
- @implementation DES3Util
-
- // 加密方法
- + (NSString*)encrypt:(NSString*)plainText {
- NSData* data = [plainText dataUsingEncoding:NSUTF8StringEncoding];
- size_t plainTextBufferSize = [data length];
- const void *vplainText = (const void *)[data bytes];
-
- CCCryptorStatus ccStatus;
- uint8_t *bufferPtr = NULL;
- size_t bufferPtrSize = 0;
- size_t movedBytes = 0;
-
- bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);
- bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));
- memset((void *)bufferPtr, 0x0, bufferPtrSize);
-
- const void *vkey = (const void *) [gkey UTF8String];
- const void *vinitVec = (const void *) [gIv UTF8String];
-
- ccStatus = CCCrypt(kCCEncrypt,
- kCCAlgorithm3DES,
- kCCOptionPKCS7Padding,
- vkey,
- kCCKeySize3DES,
- vinitVec,
- vplainText,
- plainTextBufferSize,
- (void *)bufferPtr,
- bufferPtrSize,
- &movedBytes);
-
- NSData *myData = [NSData dataWithBytes:(const void *)bufferPtr length:(NSUInteger)movedBytes];
- NSString *result = [GTMBase64 stringByEncodingData:myData];
- return result;
- }
-
- // 解密方法
- + (NSString*)decrypt:(NSString*)encryptText {
- NSData *encryptData = [GTMBase64 decodeData:[encryptText dataUsingEncoding:NSUTF8StringEncoding]];
- size_t plainTextBufferSize = [encryptData length];
- const void *vplainText = [encryptData bytes];
-
- CCCryptorStatus ccStatus;
- uint8_t *bufferPtr = NULL;
- size_t bufferPtrSize = 0;
- size_t movedBytes = 0;
-
- bufferPtrSize = (plainTextBufferSize + kCCBlockSize3DES) & ~(kCCBlockSize3DES - 1);
- bufferPtr = malloc( bufferPtrSize * sizeof(uint8_t));
- memset((void *)bufferPtr, 0x0, bufferPtrSize);
-
- const void *vkey = (const void *) [gkey UTF8String];
- const void *vinitVec = (const void *) [gIv UTF8String];
-
- ccStatus = CCCrypt(kCCDecrypt,
- kCCAlgorithm3DES,
- kCCOptionPKCS7Padding,
- vkey,
- kCCKeySize3DES,
- vinitVec,
- vplainText,
- plainTextBufferSize,
- (void *)bufferPtr,
- bufferPtrSize,
- &movedBytes);
-
- NSString *result = [[[NSString alloc] initWithData:[NSData dataWithBytes:(const void *)bufferPtr
- length:(NSUInteger)movedBytes] encoding:NSUTF8StringEncoding] autorelease];
- return result;
- }
-
- @end
iPhone端的加密工具类中引入了“GTMBase64.h”,这是iOS平台的Base64编码工具类,就不在这里贴出相关代码了,需要的百度一下就能找到,实在找不到就回复留言给我。
好了,赶紧试一下吧,JAVA,Android和iPhone三个平台的加密不一致问题是不是解决了呢?其实,对此问题,还有一种更好的实现方式,那就是用C语言写一套加密程序,这样在iOS平台是可以直接使用C程序的,而在Java和Android端通过JNI去调用C语言编写的加密方法,这是不是就实现了3个平台调用同一套加密程序呢?
主题:Android、iPhone和Java三个平台一致的加密工具
标签:安卓 ini bytes org set stringbu ptr data utf-8
原文地址:http://www.cnblogs.com/cnsanshao/p/6018771.html