php blowfish加密解密算法

<?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'; $key128 = '1234567890123456';  printf("iv: %s/n",bin2hex($iv)); printf("key256: %s/n",bin2hex($key256)); printf("key128: %s/n",bin2hex($key128));  $cleartext = 'The quick brown fox jumped over the lazy dog'; printf("clearText: %s/n/n",$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:/n%s/n/n",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:/n%s/n/n",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  ?>