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<?php /** * php blowfish 算法 * Class blowfish */class blowfish{ /*** blowfish + cbc模式 + pkcs5补码 加密* @param string $str 需要加密的数据* @return string 加密后base64加密的数据*/ public function blowfish_cbc_pkcs5_encrypt（$str） {$cipher = mcrypt_module_open（MCRYPT_BLOWFISH, "", MCRYPT_MODE_CBC, ""）; //pkcs5补码$size = mcrypt_get_block_size（MCRYPT_BLOWFISH, MCRYPT_MODE_CBC）;$str = $this->pkcs5_pad（$str, $size）; if （mcrypt_generic_init（$cipher, $this->key, $this->iv） ！= -1）{ $cipherText = mcrypt_generic（$cipher, $str）; mcrypt_generic_deinit（$cipher）;return base64_encode（$cipherText）;} mcrypt_module_close（$cipher）; }/*** blowfish + cbc模式 + pkcs5 解密 去补码* @param string $str 加密的数据* @return string 解密的数据*/ public function blowfish_cbc_pkcs5_decrypt（$str） {$cipher = mcrypt_module_open（MCRYPT_BLOWFISH, "", MCRYPT_MODE_CBC, ""）; if （mcrypt_generic_init（$cipher, $this->key, $this->iv） ！= -1）{ $cipherText = mdecrypt_generic（$cipher, base64_decode（$str））; mcrypt_generic_deinit（$cipher）;return $this->pkcs5_unpad（$cipherText）;} mcrypt_module_close（$cipher）; }private function pkcs5_pad（$text, $blocksize）{$pad = $blocksize - （strlen （ $text ） % $blocksize）;return $text . str_repeat （ chr （ $pad ）, $pad ）; }private function pkcs5_unpad（$str）{$pad = ord（$str[（$len = strlen（$str）） - 1]）;return substr（$str, 0, strlen（$str） - $pad）; }}

<?php$cipher = mcrypt_module_open（MCRYPT_BLOWFISH, "", MCRYPT_MODE_CBC, ""）; // The block-size of the Blowfish algorithm is 64-bits, therefore our IV // is always 8 bytes: $iv = "12345678";$key256 = "1234567890123456ABCDEFGHIJKLMNOP"; $key128 = "1234567890123456";printf（"iv: %s
",bin2hex（$iv））; printf（"key256: %s
",bin2hex（$key256））; printf（"key128: %s
",bin2hex（$key128））;$cleartext = "The quick brown fox jumped over the lazy dog"; printf（"clearText: %s

",$cleartext）; // Do 256-bit blowfish encryption: // The strengh of the encryption is determined by the length of the key // passed to mcrypt_generic_init if （mcrypt_generic_init（$cipher, $key256, $iv） ！= -1） {// PHP pads with NULL bytes if $cleartext is not a multiple of the block size..$cipherText = mcrypt_generic（$cipher,$cleartext ）;mcrypt_generic_deinit（$cipher）;// Display the result in hex.printf（"256-bit blowfish encrypted:
%s

",bin2hex（$cipherText））; }// 128-bit blowfish encryption: if （mcrypt_generic_init（$cipher, $key128, $iv） ！= -1） {// PHP pads with NULL bytes if $cleartext is not a multiple of the block size..$cipherText = mcrypt_generic（$cipher,$cleartext ）;mcrypt_generic_deinit（$cipher）;// Display the result in hex.printf（"128-bit blowfish encrypted:
%s

",bin2hex（$cipherText））; }// ------- // Results // ------- // You may use these as test vectors for testing your Blowfish implementations... //// iv: 3132333435363738 // key256: 313233343536373839303132333435364142434445464748494a4b4c4d4e4f50 // key128: 31323334353637383930313233343536 // clearText: The quick brown fox jumped over the lazy dog //// 256-bit blowfish encrypted: // 276855ca6c0d60f7d9708210440c1072e05d078e733b34b4198d609dc2fcc2f0c30926cdef3b6d52baf6e345aa03f83e //// 128-bit blowfish encrypted: // d2b5abb73208aea3790621d028afcc74d8dd65fb9ea8e666444a72523f5ecca60df79a424e2c714fa6efbafcc40bdca0?>