AES指高级加密标准(Advanced Encryption Standard),是当前最流行的一种密码算法,在web应用开发,特别是对外提供接口时经常会用到,下面是我整理的一套php与java通用的AES加密解密算法。
php版代码如下:
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<?php class CryptAES { protected $cipher = MCRYPT_RIJNDAEL_128; protected $mode = MCRYPT_MODE_ECB; protected $pad_method = NULL; protected $secret_key = '' ; protected $iv = '' ; public function set_cipher( $cipher ) { $this ->cipher = $cipher ; } public function set_mode( $mode ) { $this ->mode = $mode ; } public function set_iv( $iv ) { $this ->iv = $iv ; } public function set_key( $key ) { $this ->secret_key = $key ; } public function require_pkcs5() { $this ->pad_method = 'pkcs5' ; } protected function pad_or_unpad( $str , $ext ) { if ( is_null ( $this ->pad_method) ) { return $str ; } else { $func_name = __CLASS__ . '::' . $this ->pad_method . '_' . $ext . 'pad' ; if ( is_callable ( $func_name ) ) { $size = mcrypt_get_block_size( $this ->cipher, $this ->mode); return call_user_func( $func_name , $str , $size ); } } return $str ; } protected function pad( $str ) { return $this ->pad_or_unpad( $str , '' ); } protected function unpad( $str ) { return $this ->pad_or_unpad( $str , 'un' ); } public function encrypt( $str ) { $str = $this ->pad( $str ); $td = mcrypt_module_open( $this ->cipher, '' , $this ->mode, '' ); if ( empty ( $this ->iv) ) { $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size( $td ), MCRYPT_RAND); } else { $iv = $this ->iv; } mcrypt_generic_init( $td , $this ->secret_key, $iv ); $cyper_text = mcrypt_generic( $td , $str ); $rt = base64_encode ( $cyper_text ); //$rt = bin2hex($cyper_text); mcrypt_generic_deinit( $td ); mcrypt_module_close( $td ); return $rt ; } public function decrypt( $str ){ $td = mcrypt_module_open( $this ->cipher, '' , $this ->mode, '' ); if ( empty ( $this ->iv) ) { $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size( $td ), MCRYPT_RAND); } else { $iv = $this ->iv; } mcrypt_generic_init( $td , $this ->secret_key, $iv ); //$decrypted_text = mdecrypt_generic($td, self::hex2bin($str)); $decrypted_text = mdecrypt_generic( $td , base64_decode ( $str )); $rt = $decrypted_text ; mcrypt_generic_deinit( $td ); mcrypt_module_close( $td ); return $this ->unpad( $rt ); } public static function hex2bin( $hexdata ) { $bindata = '' ; $length = strlen ( $hexdata ); for ( $i =0; $i amp;< $length ; $i += 2) { $bindata .= chr (hexdec( substr ( $hexdata , $i , 2))); } return $bindata ; } public static function pkcs5_pad( $text , $blocksize ) { $pad = $blocksize - ( strlen ( $text ) % $blocksize ); return $text . str_repeat ( chr ( $pad ), $pad ); } public static function pkcs5_unpad( $text ) { $pad = ord( $text { strlen ( $text ) - 1}); if ( $pad > strlen ( $text )) return false; if ( strspn ( $text , chr ( $pad ), strlen ( $text ) - $pad ) != $pad ) return false; return substr ( $text , 0, -1 * $pad ); } } $keyStr = 'UITN25LMUQC436IM' ; $plainText = 'this is a string will be AES_Encrypt' ; $aes = new CryptAES(); $aes ->set_key( $keyStr ); $aes ->require_pkcs5(); $encText = $aes ->encrypt( $plainText ); $decString = $aes ->decrypt( $encText ); echo $encText , "n" , $decString ; ?> |
运行结果:
fhTD0NNIzv4jUEhJuC1htFFXJ/4S/rL6tDCJPiNvJ8mVLHWOD0HWweuxHynxoZf9
this is a string will be AES_Encrypt
java版代码如下:
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import java.security.Key; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; import org.apache.commons.codec.binary.Base64; public class CryptAES { private static final String AESTYPE = "AES/ECB/PKCS5Padding" ; public static String AES_Encrypt(String keyStr, String plainText) { byte [] encrypt = null ; try { Key key = generateKey(keyStr); Cipher cipher = Cipher.getInstance(AESTYPE); cipher.init(Cipher.ENCRYPT_MODE, key); encrypt = cipher.doFinal(plainText.getBytes()); } catch (Exception e){ e.printStackTrace(); } return new String(Base64.encodeBase64(encrypt)); } public static String AES_Decrypt(String keyStr, String encryptData) { byte [] decrypt = null ; try { Key key = generateKey(keyStr); Cipher cipher = Cipher.getInstance(AESTYPE); cipher.init(Cipher.DECRYPT_MODE, key); decrypt = cipher.doFinal(Base64.decodeBase64(encryptData)); } catch (Exception e){ e.printStackTrace(); } return new String(decrypt).trim(); } private static Key generateKey(String key) throws Exception{ try { SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES" ); return keySpec; } catch (Exception e){ e.printStackTrace(); throw e; } } public static void main(String[] args) { String keyStr = "UITN25LMUQC436IM" ; String plainText = "this is a string will be AES_Encrypt" ; String encText = AES_Encrypt(keyStr, plainText); String decString = AES_Decrypt(keyStr, encText); System.out.println(encText); System.out.println(decString); } } |
运行结果:
fhTD0NNIzv4jUEhJuC1htFFXJ/4S/rL6tDCJPiNvJ8mVLHWOD0HWweuxHynxoZf9
this is a string will be AES_Encrypt