| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | namespace LegalThings\DataEnricher\Processor; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  | use LegalThings\DataEnricher\Node; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  | use LegalThings\DataEnricher\Processor; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  |  * Transform processor, apply transformation functions on data | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  | class Transform implements Processor | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  |     use Processor\Implementation; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |      * Allowed transformation functions | 
            
                                                                                                            
                            
            
                                    
            
            
                | 17 |  |  |      * @var array  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 18 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  |     public $functions; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |      * Class constructor | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |      * @param string $property  Property key with the processing instruction | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 | 19 |  |     public function __construct($property) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 | 19 |  |         $this->property = $property; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 | 19 |  |         $this->functions = $this->getDefaultFunctions(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 | 19 |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |      * Default transformation functions | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  |      * @var array | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 | 19 |  |     public function getDefaultFunctions() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 | 19 |  |         $class = 'LegalThings\DataEnricher\Processor\Transform'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |         return [ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 | 19 |  |             'hash' => 'hash', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 | 19 |  |             'hash_hmac' => 'hash_hmac', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 | 19 |  |             'base64_encode' => 'base64_encode', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 | 19 |  |             'base64_decode' => 'base64_decode', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 | 19 |  |             'json_encode' => 'json_encode', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 | 19 |  |             'json_decode' => 'json_decode', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 | 19 |  |             'serialize' => 'serialize', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 | 19 |  |             'unserialize' => 'unserialize', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 | 19 |  |             'strtotime' => 'strtotime', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 | 19 |  |             'date' => 'date', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 | 19 |  |             'public_encrypt' => "$class::public_encrypt", | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 | 19 |  |             'private_encrypt' => "$class::private_encrypt", | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 | 19 |  |             'private_decrypt' => "$class::private_decrypt", | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 | 19 |  |             'generate_private_key' => "$class::generate_private_key", | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 | 19 |  |             'generate_public_key' => "$class::generate_public_key", | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 | 19 |  |             'generate_signature' => "$class::generate_signature", | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 | 19 |  |             'verify_signature' => "$class::verify_signature" | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 | 19 |  |         ]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  |      * Apply processing to a single node | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  |      * @param Node $node | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 67 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 68 | 15 |  |     public function applyToNode(Node $node) | 
            
                                                                        
                            
            
                                    
            
            
                | 69 |  |  |     { | 
            
                                                                        
                            
            
                                    
            
            
                | 70 | 15 |  |         $instruction = $node->getInstruction($this); | 
            
                                                                        
                            
            
                                    
            
            
                | 71 | 15 |  |         $transformations = !is_array($instruction) ? [$instruction] : $instruction; | 
            
                                                                        
                            
            
                                    
            
            
                | 72 |  |  |          | 
            
                                                                        
                            
            
                                    
            
            
                | 73 | 15 |  |         if (isset($node->input)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 74 | 5 |  |             $input = $this->resolveNodes($node->input); | 
            
                                                                        
                            
            
                                    
            
            
                | 75 | 5 |  |         } | 
            
                                                                        
                            
            
                                    
            
            
                | 76 |  |  |          | 
            
                                                                        
                            
            
                                    
            
            
                | 77 | 15 |  |         foreach ($transformations as $transformation) { | 
            
                                                                        
                            
            
                                    
            
            
                | 78 | 15 |  |             if (is_string($transformation) && !isset($input)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 79 | 1 |  |                 continue; | 
            
                                                                        
                            
            
                                    
            
            
                | 80 |  |  |             } | 
            
                                                                        
                            
            
                                    
            
            
                | 81 |  |  |              | 
            
                                                                        
                            
            
                                    
            
            
                | 82 | 14 |  |             if (is_string($transformation)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 83 | 5 |  |                 list($key, $args) = explode(':', $transformation) + [null, null]; | 
            
                                                                        
                            
            
                                    
            
            
                | 84 | 14 |  |             } elseif (is_object($transformation) || is_array($transformation)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 85 | 9 |  |                 $transformation = (object)$transformation; | 
            
                                                                        
                            
            
                                    
            
            
                | 86 | 9 |  |                 $key = isset($transformation->function) ? $transformation->function : null; | 
            
                                                                        
                            
            
                                    
            
            
                | 87 | 9 |  |                 $args = isset($transformation->args) ? $transformation->args : []; | 
            
                                                                        
                            
            
                                    
            
            
                | 88 | 9 |  |             } | 
            
                                                                        
                            
            
                                    
            
            
                | 89 |  |  |              | 
            
                                                                        
                            
            
                                    
            
            
                | 90 | 14 |  |             if (!isset($this->functions[$key])) { | 
            
                                                                        
                            
            
                                    
            
            
                | 91 | 1 |  |                 throw new \Exception("Unknown transformation '$key'"); | 
            
                                                                        
                            
            
                                    
            
            
                | 92 |  |  |             } | 
            
                                                                        
                            
            
                                    
            
            
                | 93 |  |  |              | 
            
                                                                        
                            
            
                                    
            
            
                | 94 | 13 |  |             if (isset($args)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 95 | 12 |  |                 $args = $this->resolveNodes($args); | 
            
                                                                        
                            
            
                                    
            
            
                | 96 | 12 |  |             } | 
            
                                                                        
                            
            
                                    
            
            
                | 97 |  |  |              | 
            
                                                                        
                            
            
                                    
            
            
                | 98 | 13 |  |             $fn = $this->functions[$key]; | 
                            
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                | 99 |  |  |              | 
            
                                                                        
                            
            
                                    
            
            
                | 100 | 13 |  |             if (is_string($transformation)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 101 | 4 |  |                 $result = isset($args) ? call_user_func($fn, $args, $input) : call_user_func($fn, $input); | 
                            
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                | 102 | 13 |  |             } elseif (is_object($transformation)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 103 | 9 |  |                 $result = call_user_func_array($fn, $args); | 
                            
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                | 104 | 9 |  |             } | 
            
                                                                        
                            
            
                                    
            
            
                | 105 | 14 |  |         } | 
            
                                                                        
                            
            
                                    
            
            
                | 106 |  |  |          | 
            
                                                                        
                            
            
                                    
            
            
                | 107 | 14 |  |         if (isset($result)) { | 
            
                                                                        
                            
            
                                    
            
            
                | 108 | 13 |  |             $node->setResult($result); | 
            
                                                                        
                            
            
                                    
            
            
                | 109 | 13 |  |         } | 
            
                                                                        
                            
            
                                    
            
            
                | 110 | 14 |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  |      * Resolve instructions of nodes by getting their results | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  |      * @param Node $node | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  |      * @return mixed $result | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 | 14 |  |     protected function resolveNodes($node) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 | 14 |  |         if (!$node instanceof Node) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 | 14 |  |             return $node; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 | 1 |  |         return $node->getResult(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  |      * Generate a private key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 |  |  |      * @param array $options | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  |      * @throws RuntimeException | 
            
                                                                                                            
                            
            
                                    
            
            
                | 133 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 135 | 1 |  |     public function generate_private_key($options = []) | 
                            
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                | 136 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 137 |  |  |         $config = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 | 1 |  |             "digest_alg" => "sha512", | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 | 1 |  |             "private_key_bits" => 2048, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 | 1 |  |             "private_key_type" => OPENSSL_KEYTYPE_RSA, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 | 1 |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 143 | 1 |  |         $input = $options + $config; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 144 | 1 |  |         $res = openssl_pkey_new($input); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 145 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 146 | 1 |  |         openssl_pkey_export($res, $key);  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 147 | 1 |  |         return $key; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 148 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 149 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 150 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 151 |  |  |      * Generate a public based on existing private key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 152 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 153 |  |  |      * @param string $privateKey | 
            
                                                                                                            
                            
            
                                    
            
            
                | 154 |  |  |      * @param string $passphrase | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  |      * @throws \RuntimeException | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 157 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 158 | 1 |  |     public function generate_public_key($privateKey, $passphrase = null) | 
                            
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                | 159 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 160 | 1 |  |         $privKey = openssl_get_privatekey($privateKey, $passphrase); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 161 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 162 | 1 |  |         if (!is_resource($privKey)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 163 |  |  |             $type = gettype($privKey); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 164 |  |  |             throw new \Exception("Expected private key to be resource, got: '$type'. Check if the given private key is in correct syntax."); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 165 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 166 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 167 | 1 |  |         $pubKey = openssl_pkey_get_details($privKey); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 168 | 1 |  |         $key = $pubKey["key"]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 169 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 170 | 1 |  |         return $key; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 171 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 172 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 173 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 174 |  |  |      * Encrypts data with private key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 175 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 176 |  |  |      * @link http://php.net/manual/en/function.openssl-private-encrypt.php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 177 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 178 |  |  |      * @param string $data | 
            
                                                                                                            
                            
            
                                    
            
            
                | 179 |  |  |      * @param string $key          The private key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 180 |  |  |      * @param string $passphrase | 
            
                                                                                                            
                            
            
                                    
            
            
                | 181 |  |  |      * @param int $padding | 
            
                                                                                                            
                            
            
                                    
            
            
                | 182 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 183 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 184 |  |  |      */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 185 | 1 | View Code Duplication |     function private_encrypt($data, $key, $passphrase = null, $padding = OPENSSL_PKCS1_PADDING) | 
                            
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                | 186 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 | 1 |  |         $privKey = openssl_get_privatekey($key, $passphrase); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 | 1 |  |         if (!is_resource($privKey)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 |  |  |             $type = gettype($privKey); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 |  |  |             throw new \Exception("Expected private key to be resource, got: '$type'. Check if the given private key is in correct syntax."); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 193 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 | 1 |  |         openssl_private_encrypt($data, $result, $privKey, $padding); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 | 1 |  |         if (!is_string($result)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 |  |  |             throw new \Exception("Failed to encrypt data. Result: '$result'"); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 | 1 |  |         $base64 = base64_encode($result); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 | 1 |  |         return $base64; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 |  |  |      * Decrypts data with public key, that was encrypted with private key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 |  |  |      * @link http://php.net/manual/en/function.openssl-private-decrypt.php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 209 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 210 |  |  |      * @param string $data | 
            
                                                                                                            
                            
            
                                    
            
            
                | 211 |  |  |      * @param string $key          The public key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 212 |  |  |      * @param string $passphrase | 
                            
                    |  |  |  | 
                                                                                        
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                | 213 |  |  |      * @param int $padding | 
            
                                                                                                            
                            
            
                                    
            
            
                | 214 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 215 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 216 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 217 | 1 |  |     function private_decrypt($data, $key, $padding = OPENSSL_PKCS1_PADDING) | 
                            
                    |  |  |  | 
                                                                                        
                                                                                            
                                                                                            
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                | 218 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 219 | 1 |  |         if ($this->is_base64($data)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 220 | 1 |  |             $data = base64_decode($data); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 221 | 1 |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 222 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 223 | 1 |  |         openssl_public_decrypt($data, $result, $key, $padding); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 224 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 225 | 1 |  |         if (!is_string($result)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 226 |  |  |             throw new \Exception("Failed to decrypt data. Result: '$result'"); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 227 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 228 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 229 | 1 |  |         return $result; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 230 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 231 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 232 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 233 |  |  |      * Encrypts data with public key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 234 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 235 |  |  |      * @link http://php.net/manual/en/function.openssl-public-encrypt.php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 236 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 237 |  |  |      * @param string $data | 
            
                                                                                                            
                            
            
                                    
            
            
                | 238 |  |  |      * @param string $key    The public key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 239 |  |  |      * @param int $padding | 
            
                                                                                                            
                            
            
                                    
            
            
                | 240 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 241 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 242 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 243 | 1 |  |     function public_encrypt($data, $key, $padding = OPENSSL_PKCS1_PADDING) | 
                            
                    |  |  |  | 
                                                                                        
                                                                                            
                                                                                            
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                | 244 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 245 | 1 |  |         openssl_public_encrypt($data, $result, $key, $padding); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 246 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 247 | 1 |  |         if (!is_string($result)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 248 |  |  |             throw new \Exception("Failed to encrypt data. Result: '$result'"); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 249 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 250 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 251 | 1 |  |         $base64 = base64_encode($result); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 252 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 253 | 1 |  |         return $base64; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 254 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 255 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 256 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 257 |  |  |      * Generate signature based on private key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 258 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 259 |  |  |      * @link http://php.net/manual/en/function.openssl-sign.php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 260 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 261 |  |  |      * @param string $data | 
            
                                                                                                            
                            
            
                                    
            
            
                | 262 |  |  |      * @param string $key         The private key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 263 |  |  |      * @param string $passphrase | 
            
                                                                                                            
                            
            
                                    
            
            
                | 264 |  |  |      * @param int $signature_alg | 
            
                                                                                                            
                            
            
                                    
            
            
                | 265 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 266 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 267 |  |  |      */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 268 | 1 | View Code Duplication |     function generate_signature($data, $key, $passphrase = null, $signature_alg = OPENSSL_ALGO_SHA1) | 
                            
                    |  |  |  | 
                                                                                        
                                                                                            
                                                                                            
                                                                                            
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                | 269 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 270 | 1 |  |         $privKey = openssl_get_privatekey($key, $passphrase); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 271 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 272 | 1 |  |         if (!is_resource($privKey)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 273 |  |  |             $type = gettype($privKey); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 274 |  |  |             throw new \Exception("Expected private key to be resource, got: '$type'. Check if the given private key is in correct syntax."); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 275 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 276 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 277 | 1 |  |         openssl_sign($data, $result, $privKey, $signature_alg); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 278 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 279 | 1 |  |         if (!is_string($result)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 280 |  |  |             throw new \Exception("Failed to encrypt data. Result: '$result'"); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 281 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 282 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 283 | 1 |  |         $base64 = base64_encode($result); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 284 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 285 | 1 |  |         return $base64; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 286 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 287 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 288 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 289 |  |  |      * Verify signature that was encrypted with private key through public key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 290 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 291 |  |  |      * @link http://php.net/manual/en/function.openssl-verify.php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 292 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 293 |  |  |      * @param string $data | 
            
                                                                                                            
                            
            
                                    
            
            
                | 294 |  |  |      * @param string $signature | 
            
                                                                                                            
                            
            
                                    
            
            
                | 295 |  |  |      * @param string $key         The public key | 
            
                                                                                                            
                            
            
                                    
            
            
                | 296 |  |  |      * @param string $passphrase | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 297 |  |  |      * @param int $signature_alg | 
            
                                                                                                            
                            
            
                                    
            
            
                | 298 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 299 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 300 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 301 | 1 |  |     function verify_signature($data, $signature, $key, $signature_alg = OPENSSL_ALGO_SHA1) | 
                            
                    |  |  |  | 
                                                                                        
                                                                                            
                                                                                            
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 302 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 303 | 1 |  |         if ($this->is_base64($signature)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 304 | 1 |  |             $signature = base64_decode($signature); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 305 | 1 |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 306 |  |  |          | 
            
                                                                                                            
                            
            
                                    
            
            
                | 307 | 1 |  |         return openssl_verify($data, $signature, $key, $signature_alg); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 308 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 309 |  |  |      | 
            
                                                                                                            
                            
            
                                    
            
            
                | 310 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 311 |  |  |      * Check if input is valid base64 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 312 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 313 |  |  |      * @param string $data | 
            
                                                                                                            
                            
            
                                    
            
            
                | 314 |  |  |      *  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 315 |  |  |      * @return boolean | 
            
                                                                                                            
                            
            
                                    
            
            
                | 316 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 317 | 2 |  |     function is_base64($data) | 
                            
                    |  |  |  | 
                                                                                        
                                                                                            
                                                                                            
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 318 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 319 | 2 |  |         return base64_encode(base64_decode($data)) === $data; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 320 |  |  |     } | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 321 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 322 |  |  |  | 
            
                        
If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: