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Encrypting and Decrypting with Mcrypt

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  1. private $_key='some key';
  2.  
  3.        /**
  4. 	* Encrypt using mcrypt
  5. 	*
  6. 	* Value is encrypted with mcrypt and base64
  7. 	*
  8. 	* @param mixed $val Can be string or int
  9. 	* @return string Encoded value
  10. 	*/
  11.  
  12. 	function mcryptEncode($val) {
  13. 		$iv_size = mcrypt_get_iv_size(MCRYPT_XTEA, MCRYPT_MODE_ECB);
  14. 		$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
  15. 		$enc = mcrypt_encrypt(MCRYPT_XTEA, $this->_key, $val, MCRYPT_MODE_ECB, $iv);
  16. 		$benc = base64_encode($enc);
  17. 		return $benc;
  18. 	}
  19.  
  20. 	/**
  21. 	* Decrypt using mcrypt
  22. 	*
  23. 	* Takes value encrypted with mcrypt and base64 and decrypts 
  24. 	*
  25. 	* @param string $benc Encrypted mcrypt and base64 value
  26. 	* @return string Decoded value
  27. 	*/
  28.  
  29. 	function mcryptDecode($benc) {
  30. 		$bdec = base64_decode($benc);
  31. 		$iv_size = mcrypt_get_iv_size(MCRYPT_XTEA, MCRYPT_MODE_ECB);
  32. 		$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
  33. 		$dec = mcrypt_decrypt(MCRYPT_XTEA, $this->_key, $bdec, MCRYPT_MODE_ECB, $iv);
  34. 		return $dec;
  35. 	}

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