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<?php |
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namespace LeKoala\Encrypt; |
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use ParagonIE\CipherSweet\BlindIndex; |
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use ParagonIE\CipherSweet\EncryptedField; |
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use ParagonIE\CipherSweet\Transformation\LastFourDigits; |
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/** |
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* Value will be set on parent record through built in getField |
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* mechanisms for composite fields |
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* |
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* This can be useful to store phone numbers, national numbers... |
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* We keep two indexes: |
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* - One with the full record |
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* - One with the last 4 numbers (so if your phone number is +00 471 123 456, it will be searchable with 3456) |
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*/ |
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class EncryptedNumberField extends EncryptedDBField |
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{ |
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/** |
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* @param array |
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*/ |
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private static $composite_db = array( |
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"Value" => "Varchar(191)", |
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"BlindIndex" => 'Varchar(32)', |
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"LastFourBlindIndex" => 'Varchar(16)', |
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); |
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/** |
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* @return string |
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*/ |
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public function getLastFourBlindIndexField() |
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{ |
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return $this->getField('LastFourBlindIndex'); |
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} |
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/** |
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* @return $this |
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*/ |
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public function setLastFourBlindIndexField($value, $markChanged = true) |
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{ |
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return $this->setField('LastFourBlindIndex', $value, $markChanged); |
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} |
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/** |
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* @param CipherSweet $engine |
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* @return EncryptedField |
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*/ |
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public function getEncryptedField($engine = null) |
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{ |
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if ($engine === null) { |
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$engine = EncryptHelper::getCipherSweet(); |
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} |
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$encryptedField = (new EncryptedField($engine, $this->tableName, $this->name)) |
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// Add a blind index for the "last 4 of SSN": |
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->addBlindIndex(new BlindIndex($this->name . "LastFourBlindIndex", [new LastFourDigits()], 16)) |
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->addBlindIndex(new BlindIndex($this->name . "BlindIndex", [], 32)); |
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return $encryptedField; |
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} |
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/** |
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* This is not called anymore, we rely on saveInto for now |
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* @link https://github.com/silverstripe/silverstripe-framework/issues/8800 |
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* @param array $manipulation |
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* @return void |
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*/ |
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public function writeToManipulation(&$manipulation) |
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{ |
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$encryptedField = $this->getEncryptedField(); |
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if ($this->value) { |
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$dataForStorage = $encryptedField->prepareForStorage($this->value); |
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$encryptedValue = $this->prepValueForDB($dataForStorage[0]); |
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$blindIndexes = $dataForStorage[1]; |
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} else { |
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$encryptedValue = null; |
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$blindIndexes = []; |
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} |
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$manipulation['fields'][$this->name . 'Value'] = $encryptedValue; |
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$manipulation['fields'][$this->name . 'BlindIndex'] = $blindIndexes[$this->name . 'BlindIndex'] ?? null; |
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$manipulation['fields'][$this->name . 'LastFourBlindIndex'] = $blindIndexes[$this->name . 'LastFourBlindIndex'] ?? null; |
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} |
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public function saveInto($dataObject) |
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{ |
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$encryptedField = $this->getEncryptedField(); |
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if ($this->value) { |
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$dataForStorage = $encryptedField->prepareForStorage($this->value); |
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$encryptedValue = $this->prepValueForDB($dataForStorage[0]); |
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$blindIndexes = $dataForStorage[1]; |
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} else { |
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$encryptedValue = null; |
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$blindIndexes = []; |
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} |
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// Encrypt value |
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$key = $this->getName() . 'Value'; |
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$dataObject->setField($key, $encryptedValue); |
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// Build blind index |
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$key = $this->getName() . 'BlindIndex'; |
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if (isset($blindIndexes[$key])) { |
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$dataObject->setField($key, $blindIndexes[$key]); |
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} |
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// Build last four blind index |
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$key = $this->getName() . 'LastFourBlindIndex'; |
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if (isset($blindIndexes[$key])) { |
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$dataObject->setField($key, $blindIndexes[$key]); |
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} |
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} |
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public function addToQuery(&$query) |
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{ |
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parent::addToQuery($query); |
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$query->selectField(sprintf('"%sValue"', $this->name)); |
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$query->selectField(sprintf('"%sBlindIndex"', $this->name)); |
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$query->selectField(sprintf('"%sLastFourBlindIndex"', $this->name)); |
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} |
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} |
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lekoala /
silverstripe-encrypt
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