Mikel
[转载]鉴客 Android客户端与服务器端通过DES加密认证-Android开发源码下载-eoe Android开发者社区_Android开发论坛 – Powered by Discuz!.
由于Android应用没有像web开发中的session机制，所以采用PHPSESSID的方式，是没有办法获取客户端登录状态的。
这种情况下，如何在用户登录后，服务器端获取用户登录状态并保持，就必须采用一种“握手”的方式。
每个手机都有自己的IMEI号，那么能不能通过这个标识去做认证呢？
经过试验，答案是可以！
客户端在请求服务器端的时候，请求参数为 IMEI （param 1）及 IMEI&UA （param 2）经过加密的字符串；服务器端对客户端传递的两个参数进行解密，比对两个IMEI值是否相同。如果相同，返回token给客户端，以后每次客户端请求服 务器端的时候，都携带该token。这样服务器就可以获取用户登录状态了。
这里，我采用的DES加密的方式，由于PHP和Java的DES加密是有差异的，所以单独进行处理：
<span class="kwd">import</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">security</span><span class="pun">.</span><span class="typ">Key</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">import</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">security</span><span class="pun">.</span><span class="typ">SecureRandom</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">import</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">security</span><span class="pun">.</span><span class="pln">spec</span><span class="pun">.</span><span class="typ">AlgorithmParameterSpec</span><span class="pun">；</span><span class="pln"> </span><span class="pun"></span><span class="pln"> </span><span class="kwd">import</span><span class="pln"> javax</span><span class="pun">.</span><span class="pln">crypto</span><span class="pun">.</span><span class="typ">Cipher</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">import</span><span class="pln"> javax</span><span class="pun">.</span><span class="pln">crypto</span><span class="pun">.</span><span class="typ">SecretKeyFactory</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">import</span><span class="pln"> javax</span><span class="pun">.</span><span class="pln">crypto</span><span class="pun">.</span><span class="pln">spec</span><span class="pun">.</span><span class="typ">DESKeySpec</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">import</span><span class="pln"> javax</span><span class="pun">.</span><span class="pln">crypto</span><span class="pun">.</span><span class="pln">spec</span><span class="pun">.</span><span class="typ">IvParameterSpec</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">import</span><span class="pln"> com</span><span class="pun">.</span><span class="pln">sun</span><span class="pun">.</span><span class="pln">org</span><span class="pun">.</span><span class="pln">apache</span><span class="pun">.</span><span class="pln">xml</span><span class="pun">.</span><span class="kwd">internal</span><span class="pun">.</span><span class="pln">security</span><span class="pun">.</span><span class="pln">utils</span><span class="pun">.</span><span class="typ">Base64</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">Des2</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">final</span><span class="pln"> </span><span class="typ">String</span><span class="pln"> ALGORITHM_DES </span><span class="pun">=</span><span class="pln"> </span><span class="str">"DES/CBC/PKCS5Padding"</span><span class="pun">；</span><span class="pln"> </span><span class="com">/** * DES算法，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 */</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="typ">String</span><span class="pln"> encode</span><span class="pun">（</span><span class="typ">String</span><span class="pln"> key</span><span class="pun">，</span><span class="typ">String</span><span class="pln"> data</span><span class="pun">）</span><span class="pln"> </span><span class="kwd">throws</span><span class="pln"> </span><span class="typ">Exception</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> encode</span><span class="pun">（</span><span class="pln">key</span><span class="pun">，</span><span class="pln"> data</span><span class="pun">。</span><span class="pln">getBytes</span><span class="pun">（））；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="com">/** * DES算法，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 */</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="typ">String</span><span class="pln"> encode</span><span class="pun">（</span><span class="typ">String</span><span class="pln"> key</span><span class="pun">，</span><span class="kwd">byte</span><span class="pun">[]</span><span class="pln"> data</span><span class="pun">）</span><span class="pln"> </span><span class="kwd">throws</span><span class="pln"> </span><span class="typ">Exception</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">try</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="typ">DESKeySpec</span><span class="pln"> dks </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">DESKeySpec</span><span class="pun">（</span><span class="pln">key</span><span class="pun">.</span><span class="pln">getBytes</span><span class="pun">（））；</span><span class="pln"> </span><span class="typ">SecretKeyFactory</span><span class="pln"> keyFactory </span><span class="pun">=</span><span class="pln"> </span><span class="typ">SecretKeyFactory</span><span class="pun">.</span><span class="pln">getInstance</span><span class="pun">（</span><span class="str">"DES"</span><span class="pun">）；</span><span class="pln"> </span><span class="com">//key的长度不能够小于8位字节</span><span class="pln"> </span><span class="typ">Key</span><span class="pln"> secretKey </span><span class="pun">=</span><span class="pln"> keyFactory</span><span class="pun">.</span><span class="pln">generateSecret</span><span class="pun">（</span><span class="pln">dks</span><span class="pun">）；</span><span class="pln"> </span><span class="typ">Cipher</span><span class="pln"> cipher </span><span class="pun">=</span><span class="pln"> </span><span class="typ">Cipher</span><span class="pun">.</span><span class="pln">getInstance</span><span class="pun">（</span><span class="pln">ALGORITHM_DES</span><span class="pun">）；</span><span class="pln"> </span><span class="typ">IvParameterSpec</span><span class="pln"> iv </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">IvParameterSpec</span><span class="pun">（</span><span class="str">"12345678"</span><span class="pun">.</span><span class="pln">getBytes</span><span class="pun">（））；</span><span class="pln"> </span><span class="typ">AlgorithmParameterSpec</span><span class="pln"> paramSpec </span><span class="pun">=</span><span class="pln"> iv</span><span class="pun">；</span><span class="pln"> cipher</span><span class="pun">.</span><span class="pln">init</span><span class="pun">（</span><span class="typ">Cipher</span><span class="pun">.</span><span class="pln">ENCRYPT_MODE</span><span class="pun">，</span><span class="pln"> secretKey</span><span class="pun">，</span><span class="pln">paramSpec</span><span class="pun">）；</span><span class="pln"> </span><span class="kwd">byte</span><span class="pun">[]</span><span class="pln"> bytes </span><span class="pun">=</span><span class="pln"> cipher</span><span class="pun">.</span><span class="pln">doFinal</span><span class="pun">（</span><span class="pln">data</span><span class="pun">）；</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> </span><span class="typ">Base64</span><span class="pun">.</span><span class="pln">encode</span><span class="pun">（</span><span class="pln">bytes</span><span class="pun">）；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">catch</span><span class="pln"> </span><span class="pun">（</span><span class="typ">Exception</span><span class="pln"> e</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">throw</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Exception</span><span class="pun">（</span><span class="pln">e</span><span class="pun">）；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="com">/** * DES算法，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 */</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">byte</span><span class="pun">[]</span><span class="pln"> decode</span><span class="pun">（</span><span class="typ">String</span><span class="pln"> key</span><span class="pun">，</span><span class="kwd">byte</span><span class="pun">[]</span><span class="pln"> data</span><span class="pun">）</span><span class="pln"> </span><span class="kwd">throws</span><span class="pln"> </span><span class="typ">Exception</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">try</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="typ">SecureRandom</span><span class="pln"> sr </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">SecureRandom</span><span class="pun">（）；</span><span class="pln"> </span><span class="typ">DESKeySpec</span><span class="pln"> dks </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">DESKeySpec</span><span class="pun">（</span><span class="pln">key</span><span class="pun">.</span><span class="pln">getBytes</span><span class="pun">（））；</span><span class="pln"> </span><span class="typ">SecretKeyFactory</span><span class="pln"> keyFactory </span><span class="pun">=</span><span class="pln"> </span><span class="typ">SecretKeyFactory</span><span class="pun">.</span><span class="pln">getInstance</span><span class="pun">（</span><span class="str">"DES"</span><span class="pun">）；</span><span class="pln"> </span><span class="com">//key的长度不能够小于8位字节</span><span class="pln"> </span><span class="typ">Key</span><span class="pln"> secretKey </span><span class="pun">=</span><span class="pln"> keyFactory</span><span class="pun">.</span><span class="pln">generateSecret</span><span class="pun">（</span><span class="pln">dks</span><span class="pun">）；</span><span class="pln"> </span><span class="typ">Cipher</span><span class="pln"> cipher </span><span class="pun">=</span><span class="pln"> </span><span class="typ">Cipher</span><span class="pun">.</span><span class="pln">getInstance</span><span class="pun">（</span><span class="pln">ALGORITHM_DES</span><span class="pun">）；</span><span class="pln"> </span><span class="typ">IvParameterSpec</span><span class="pln"> iv </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">IvParameterSpec</span><span class="pun">（</span><span class="str">"12345678"</span><span class="pun">。</span><span class="pln">getBytes</span><span class="pun">（））；</span><span class="pln"> </span><span class="typ">AlgorithmParameterSpec</span><span class="pln"> paramSpec </span><span class="pun">=</span><span class="pln"> iv</span><span class="pun">；</span><span class="pln"> cipher</span><span class="pun">.</span><span class="pln">init</span><span class="pun">（</span><span class="typ">Cipher</span><span class="pun">.</span><span class="pln">DECRYPT_MODE</span><span class="pun">，</span><span class="pln"> secretKey</span><span class="pun">，</span><span class="pln">paramSpec</span><span class="pun">）；</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> cipher</span><span class="pun">.</span><span class="pln">doFinal</span><span class="pun">（</span><span class="pln">data</span><span class="pun">）；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">catch</span><span class="pln"> </span><span class="pun">（</span><span class="typ">Exception</span><span class="pln"> e</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">throw</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Exception</span><span class="pun">（</span><span class="pln">e</span><span class="pun">）；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="com">/** * 获取编码后的值 * @param key * @param data * @return * @throws Exception */</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="typ">String</span><span class="pln"> decodeValue</span><span class="pun">（</span><span class="typ">String</span><span class="pln"> key</span><span class="pun">，</span><span class="typ">String</span><span class="pln"> data</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">byte</span><span class="pun">[]</span><span class="pln"> datas</span><span class="pun">；</span><span class="pln"> </span><span class="typ">String</span><span class="pln"> value </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">null</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">try</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">if</span><span class="pun">（</span><span class="typ">System</span><span class="pun">.</span><span class="pln">getProperty</span><span class="pun">（</span><span class="str">"os.name"</span><span class="pun">）</span><span class="pln"> </span><span class="pun">！=</span><span class="pln"> </span><span class="kwd">null</span><span class="pln"> </span><span class="pun">&&</span><span class="pln"> </span><span class="pun">（</span><span class="typ">System</span><span class="pun">.</span><span class="pln">getProperty</span><span class="pun">（</span><span class="str">"os.name"</span><span class="pun">）.</span><span class="pln">equalsIgnoreCase</span><span class="pun">（</span><span class="str">"sunos"</span><span class="pun">）</span><span class="pln"> </span><span class="pun">||</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="pln">getProperty</span><span class="pun">（</span><span class="str">"os.name"</span><span class="pun">）.</span><span class="pln">equalsIgnoreCase</span><span class="pun">（</span><span class="str">"linux"</span><span class="pun">）））</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> datas </span><span class="pun">=</span><span class="pln"> decode</span><span class="pun">（</span><span class="pln">key</span><span class="pun">，</span><span class="pln"> </span><span class="typ">Base64</span><span class="pun">.</span><span class="pln">decode</span><span class="pun">（</span><span class="pln">data</span><span class="pun">））；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">else</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> datas </span><span class="pun">=</span><span class="pln"> decode</span><span class="pun">（</span><span class="pln">key</span><span class="pun">，</span><span class="pln"> </span><span class="typ">Base64</span><span class="pun">.</span><span class="pln">decode</span><span class="pun">（</span><span class="pln">data</span><span class="pun">））；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> value </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">String</span><span class="pun">（</span><span class="pln">datas</span><span class="pun">）；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">catch</span><span class="pln"> </span><span class="pun">（</span><span class="typ">Exception</span><span class="pln"> e</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> value </span><span class="pun">=</span><span class="pln"> </span><span class="str">""</span><span class="pun">；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> value</span><span class="pun">；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="com">/** * test * @param key ： 12345678 */</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">（</span><span class="typ">String</span><span class="pun">[]</span><span class="pln"> args</span><span class="pun">）</span><span class="pln"> </span><span class="kwd">throws</span><span class="pln"> </span><span class="typ">Exception</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">（</span><span class="str">"明：cychai ；密："</span><span class="pln"> </span><span class="pun">+</span><span class="pln"> </span><span class="typ">Des2</span><span class="pun">.</span><span class="pln">encode</span><span class="pun">（</span><span class="str">"12345678"</span><span class="pun">，</span><span class="str">"cychai"</span><span class="pun">））；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span> |
服务器端PHP:
<span class="pun"> </span><span class="kwd">class</span><span class="pln"> DES </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">var</span><span class="pln"> $key</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">var</span><span class="pln"> $iv</span><span class="pun">；</span><span class="pln"> </span><span class="com">//偏移量</span><span class="pln"> </span><span class="kwd">function</span><span class="pln"> DES</span><span class="pun">（</span><span class="pln">$key</span><span class="pun">，</span><span class="pln"> $iv</span><span class="pun">=</span><span class="lit">0</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> $this</span><span class="pun">-></span><span class="pln">key </span><span class="pun">=</span><span class="pln"> $key</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">if</span><span class="pun">（</span><span class="pln">$iv </span><span class="pun">==</span><span class="pln"> </span><span class="lit">0</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> $this</span><span class="pun">-></span><span class="pln">iv </span><span class="pun">=</span><span class="pln"> $key</span><span class="pun">；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">else</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> $this</span><span class="pun">-></span><span class="pln">iv </span><span class="pun">=</span><span class="pln"> $iv</span><span class="pun">；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun"></span><span class="pln"> </span><span class="com">//加密</span><span class="pln"> </span><span class="kwd">function</span><span class="pln"> encrypt</span><span class="pun">（</span><span class="pln">$str</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> $size </span><span class="pun">=</span><span class="pln"> mcrypt_get_block_size </span><span class="pun">（</span><span class="pln"> MCRYPT_DES</span><span class="pun">，</span><span class="pln"> MCRYPT_MODE_CBC </span><span class="pun">）；</span><span class="pln"> $str </span><span class="pun">=</span><span class="pln"> $this</span><span class="pun">-></span><span class="pln">pkcs5Pad </span><span class="pun">（</span><span class="pln"> $str</span><span class="pun">，</span><span class="pln"> $size </span><span class="pun">）；</span><span class="pln"> $data</span><span class="pun">=</span><span class="pln">mcrypt_cbc</span><span class="pun">（</span><span class="pln">MCRYPT_DES</span><span class="pun">，</span><span class="pln"> $this</span><span class="pun">-></span><span class="pln">key</span><span class="pun">，</span><span class="pln"> $str</span><span class="pun">，</span><span class="pln"> MCRYPT_ENCRYPT</span><span class="pun">，</span><span class="pln"> $this</span><span class="pun">-></span><span class="pln">iv</span><span class="pun">）；</span><span class="pln"> </span><span class="com">//$data=strtoupper（bin2hex（$data））； //返回大写十六进制字符串</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> base64_encode</span><span class="pun">（</span><span class="pln">$data</span><span class="pun">）；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="com">//解密</span><span class="pln"> </span><span class="kwd">function</span><span class="pln"> decrypt</span><span class="pun">（</span><span class="pln">$str</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> $str </span><span class="pun">=</span><span class="pln"> base64_decode </span><span class="pun">（</span><span class="pln">$str</span><span class="pun">）；</span><span class="pln"> </span><span class="com">//$strBin = $this->hex2bin（ strtolower（$str））；</span><span class="pln"> $str </span><span class="pun">=</span><span class="pln"> mcrypt_cbc</span><span class="pun">（</span><span class="pln">MCRYPT_DES</span><span class="pun">，</span><span class="pln"> $this</span><span class="pun">-></span><span class="pln">key</span><span class="pun">，</span><span class="pln"> $str</span><span class="pun">，</span><span class="pln"> MCRYPT_DECRYPT</span><span class="pun">，</span><span class="pln"> $this</span><span class="pun">-></span><span class="pln">iv </span><span class="pun">）；</span><span class="pln"> $str </span><span class="pun">=</span><span class="pln"> $this</span><span class="pun">-></span><span class="pln">pkcs5Unpad</span><span class="pun">（</span><span class="pln"> $str </span><span class="pun">）；</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> $str</span><span class="pun">；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">function</span><span class="pln"> hex2bin</span><span class="pun">（</span><span class="pln">$hexData</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> $binData </span><span class="pun">=</span><span class="pln"> </span><span class="str">""</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">for</span><span class="pun">（</span><span class="pln">$i </span><span class="pun">=</span><span class="pln"> </span><span class="lit">0</span><span class="pun">；</span><span class="pln"> $i </span><span class="pun"><</span><span class="pln"> strlen </span><span class="pun">（</span><span class="pln"> $hexData </span><span class="pun">）；</span><span class="pln"> $i </span><span class="pun">+=</span><span class="pln"> </span><span class="lit">2</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> $binData </span><span class="pun">.=</span><span class="pln"> chr</span><span class="pun">（</span><span class="pln">hexdec</span><span class="pun">（</span><span class="pln">substr</span><span class="pun">（</span><span class="pln">$hexData</span><span class="pun">，</span><span class="pln"> $i</span><span class="pun">，</span><span class="pln"> </span><span class="lit">2</span><span class="pun">）））；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> $binData</span><span class="pun">；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun"></span><span class="pln"> </span><span class="kwd">function</span><span class="pln"> pkcs5Pad</span><span class="pun">（</span><span class="pln">$text</span><span class="pun">，</span><span class="pln"> $blocksize</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> $pad </span><span class="pun">=</span><span class="pln"> $blocksize </span><span class="pun">-</span><span class="pln"> </span><span class="pun">（</span><span class="pln">strlen </span><span class="pun">（</span><span class="pln"> $text </span><span class="pun">）</span><span class="pln"> </span><span class="pun">%</span><span class="pln"> $blocksize</span><span class="pun">）；</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> $text </span><span class="pun">.</span><span class="pln">str_repeat </span><span class="pun">（</span><span class="pln"> chr </span><span class="pun">（</span><span class="pln"> $pad </span><span class="pun">），</span><span class="pln"> $pad </span><span class="pun">）；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">function</span><span class="pln"> pkcs5Unpad</span><span class="pun">（</span><span class="pln">$text</span><span class="pun">）</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> $pad </span><span class="pun">=</span><span class="pln"> ord </span><span class="pun">（</span><span class="pln"> $text </span><span class="pun">{</span><span class="pln">strlen </span><span class="pun">（</span><span class="pln"> $text </span><span class="pun">）</span><span class="pln"> </span><span class="pun">-</span><span class="pln"> </span><span class="lit">1</span><span class="pun">}</span><span class="pln"> </span><span class="pun">）；</span><span class="pln"> </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">（</span><span class="pln">$pad </span><span class="pun">></span><span class="pln"> strlen </span><span class="pun">（</span><span class="pln"> $text </span><span class="pun">））</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> </span><span class="kwd">false</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">（</span><span class="pln">strspn </span><span class="pun">（</span><span class="pln"> $text</span><span class="pun">，</span><span class="pln"> chr </span><span class="pun">（</span><span class="pln"> $pad </span><span class="pun">），</span><span class="pln"> strlen </span><span class="pun">（</span><span class="pln"> $text </span><span class="pun">）</span><span class="pln"> </span><span class="pun">-</span><span class="pln"> $pad </span><span class="pun">）</span><span class="pln"> </span><span class="pun">！=</span><span class="pln"> $pad</span><span class="pun">）</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> </span><span class="kwd">false</span><span class="pun">；</span><span class="pln"> </span><span class="kwd">return</span><span class="pln"> substr </span><span class="pun">（</span><span class="pln"> $text</span><span class="pun">，</span><span class="pln"> </span><span class="lit">0</span><span class="pun">，</span><span class="pln"> </span><span class="pun">-</span><span class="pln"> </span><span class="lit">1</span><span class="pln"> </span><span class="pun">*</span><span class="pln"> $pad </span><span class="pun">）；</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> $str </span><span class="pun">=</span><span class="pln"> </span><span class="str">'abc'</span><span class="pun">；</span><span class="pln"> $key</span><span class="pun">=</span><span class="pln"> </span><span class="str">'12345678'</span><span class="pun">；</span><span class="pln"> $crypt </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> DES</span><span class="pun">（</span><span class="pln">$key</span><span class="pun">）；</span><span class="pln"> $mstr </span><span class="pun">=</span><span class="pln"> $crypt</span><span class="pun">-></span><span class="pln">encrypt</span><span class="pun">（</span><span class="pln">$str</span><span class="pun">）；</span><span class="pln"> $str </span><span class="pun">=</span><span class="pln"> $crypt</span><span class="pun">-></span><span class="pln">decrypt</span><span class="pun">（</span><span class="pln">$mstr</span><span class="pun">）；</span><span class="pln"> echo $str</span><span class="pun">.</span><span class="str">' <=> '</span><span class="pun">.</span><span class="pln">$mstr</span><span class="pun">；</span> |
需要注意的是： 加密的key必须为8位或者8的倍数，否则在java加密过程中会报错。
