【代碼】Android開發與PHP進行數據加密傳輸
發布時間：2013-8-16 16:01
發布者：
reggae
本文介紹在Android開發中,Android開發應用如何與PHP之間進行加密傳輸數據,詳細的代碼請參考本文。
（PS：新建的QQ群，有興趣可以加入一起討論：Android學習交流群：278744577，驗證：eec）
java代碼:
- 1 mcrypt = new MCrypt();
- 2 /* Encrypt */
- 3 String encrypted = MCrypt.bytesToHex( mcrypt.encrypt("Text to Encrypt") );
- 4 /* Decrypt */
- 5 String decrypted = new String( mcrypt.decrypt( encrypted ) );
PHP代碼:
- 1 $mcrypt = new MCrypt();
- 2 #Encrypt
- 3 $encrypted = $mcrypt->encrypt("Text to encrypt");
- 4 #Decrypt
- 5 $decrypted = $mcrypt->decrypt($encrypted);
MCrypt.java代碼:
- 1 public class MCrypt {
- 2 private String iv = "fedcba9876543210";//Dummy iv (CHANGE IT!)
- 3 private IvParameterSpec ivspec;
- 4 private SecretKeySpec keyspec;
- 5 private Cipher cipher;
- 6 private String SecretKey = "0123456789abcdef";//Dummy secretKey (CHANGE IT!)
- 7 public MCrypt()
- 8 {
- 9 ivspec = new IvParameterSpec(iv.getBytes());
- 10 keyspec = new SecretKeySpec(SecretKey.getBytes(), "AES");
- 11 cipher = Cipher.getInstance("AES/CBC/NoPadding");
- 12 }
- 13 public byte[] encrypt(String text) throws Exception
- 14 {
- 15 if(text == null || text.length() == 0)
- 16 throw new Exception("Empty string");
- 17 byte[] encrypted = null;
- 18 cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
- 19 encrypted = cipher.doFinal(padString(text).getBytes());
- 20 return encrypted;
- 21 }
- 22 public byte[] decrypt(String code) throws Exception
- 23 {
- 24 if(code == null || code.length() == 0)
- 25 throw new Exception("Empty string");
- 26 byte[] decrypted = null;
- 27 cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
- 28 decrypted = cipher.doFinal(hexToBytes(code));
- 29 return decrypted;
- 30 }
- 31 public static String bytesToHex(byte[] data)
- 32 {
- 33 if (data==null)
- 34 {
- 35 return null;
- 36 }
- 37 int len = data.length;
- 38 String str = "";
- 39 for (int i=0; i
- 40 if ((data[i]&0xFF)<16)
- 41 str = str + "0" + java.lang.Integer.toHexString(data[i]&0xFF);
- 42 else
- 43 str = str + java.lang.Integer.toHexString(data[i]&0xFF);
- 44 }
- 45 return str;
- 46 }
- 47 public static byte[] hexToBytes(String str) {
- 48 if (str==null) {
- 49 return null;
- 50 } else if (str.length() < 2) {
- 51 return null;
- 52 } else {
- 53 int len = str.length() / 2;
- 54 byte[] buffer = new byte[len];
- 55 for (int i=0; i
- 56 buffer[i] = (byte) Integer.parseInt(str.substring(i*2,i*2+2),16);
- 57 }
- 58 return buffer;
- 59 }
- 60 }
- 61
- 62 private static String padString(String source)
- 63 {
- 64 char paddingChar = ' ';
- 65 int size = 16;
- 66 int x = source.length() % size;
- 67 int padLength = size - x;
- 68 for (int i = 0; i < padLength; i++)
- 69 {
- 70 source += paddingChar;
- 71 }
- 72 return source;
- 73 }
- 74 }
mcrypt.php代碼:
- 1 class MCrypt
- 2 {
- 3 private $iv = 'fedcba9876543210'; #Same as in JAVA
- 4 private $key = '0123456789abcdef'; #Same as in JAVA
- 5
- 6 function __construct()
- 7 {
- 8 }
- 9 function encrypt($str) {
- 10 //$key = $this->hex2bin($key);
- 11 $iv = $this->iv;
- 12 $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
- 13 mcrypt_generic_init($td, $this->key, $iv);
- 14 $encrypted = mcrypt_generic($td, $str);
- 15 mcrypt_generic_deinit($td);
- 16 mcrypt_module_close($td);
- 17 return bin2hex($encrypted);
- 18 }
- 19 function decrypt($code) {
- 20 //$key = $this->hex2bin($key);
- 21 $code = $this->hex2bin($code);
- 22 $iv = $this->iv;
- 23 $td = mcrypt_module_open('rijndael-128', '', 'cbc', $iv);
- 24 mcrypt_generic_init($td, $this->key, $iv);
- 25 $decrypted = mdecrypt_generic($td, $code);
- 26 mcrypt_generic_deinit($td);
- 27 mcrypt_module_close($td);
- 28 return utf8_encode(trim($decrypted));
- 29 }
- 30 protected function hex2bin($hexdata) {
- 31 $bindata = '';
- 32 for ($i = 0; $i < strlen($hexdata); $i += 2) {
- 33 $bindata .= chr(hexdec(substr($hexdata, $i, 2)));
- 34 }
- 35 return $bindata;
- 36 }
- 37 }
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