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| <?php | |
| public function encrypt( $plaintext ) | |
| { | |
| $iv = mcrypt_create_iv( $this->iv_size, MCRYPT_RAND ); | |
| $encrypted = mcrypt_encrypt( MCRYPT_RIJNDAEL_128, $this->key, $plaintext, MCRYPT_MODE_CBC, $iv ); | |
| return base64_encode( $iv . $encrypted ); | |
| } | |
| /** | |
| * decrypts a string. assumes the intialization vector is prepended to | |
| * the ciphertext | |
| * | |
| * @param [type] $cipher [description] | |
| * | |
| * @return mixed | |
| * returns a decoded string, or false | |
| */ | |
| public function decrypt( $cipher ) | |
| { | |
| $cipher = base64_decode( $cipher ); | |
| $iv = substr( $cipher, 0, $this->iv_size ); | |
| $cipher = substr( $cipher, $this->iv_size ); | |
| return mcrypt_decrypt( MCRYPT_RIJNDAEL_128, $this->key, $cipher, MCRYPT_MODE_CBC, $iv ); | |
| } |
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