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<?php |
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namespace MadWizard\WebAuthn\Format; |
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use MadWizard\WebAuthn\Exception\DataValidationException; |
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use function array_key_exists; |
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use function get_class; |
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use function gettype; |
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final class DataValidator |
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{ |
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/** |
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* @codeCoverageIgnore |
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*/ |
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private function __construct() |
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{ |
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} |
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/** |
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* @param CborMap $data CBOR map to valdiate |
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* @param array $types Expected types in the CBOR map. Keys match with the keys from the map, the values |
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* of this array are the expected types as strings. In case of objects this is the fully qualified classname, for |
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* other types this can be any of the return values of PHP's gettype() function. When a type is prefixed with `?` |
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* it is optional and not required to be in the data array. |
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* @param bool $complete Indicates whether the $types parameter completely covers the data. If any additional fields |
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* are found in the $data map that are not in the $types array an exception is thrown. When false additional |
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* fields are ignored. |
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* |
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* @throws DataValidationException |
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* |
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* @return void Returns nothing but only returns when the data is valid. Otherwise an exception is thrown. |
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*/ |
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public static function checkMap(CborMap $data, array $types, bool $complete = true): void |
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{ |
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$data = $data->copy(); |
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foreach ($types as $key => $type) { |
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$type = self::parseType($type, $key, $optional, $nullable); |
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if ($data->has($key)) { |
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self::validateDataKey($data->get($key), $key, $type, $nullable); |
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$data->remove($key); |
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} elseif (!$optional) { |
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throw new DataValidationException(sprintf('Required key "%s" is missing in data.', $key)); |
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} |
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} |
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if ($complete && $data->count() !== 0) { |
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throw new DataValidationException(sprintf('Unexpected fields in data (%s).', implode(', ', $data->getKeys()))); |
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} |
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} |
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/** |
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* @param array $data Data array to valdiate |
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* @param array $types Expected types in the data array. Keys match with the keys from the data array, the values |
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* of this array are the expected types as strings. In case of objects this is the fully qualified classname, for |
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* other types this can be any of the return values of PHP's gettype() function. When a type is prefixed with `?` |
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* it is optional and not required to be in the data array. |
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* @param bool $complete Indicates whether the $types parameter completely covers the data. If any additional fields |
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* are found in the $data array that are not in the $types array an exception is thrown. When false additional |
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* fields are ignored. |
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* |
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* @throws DataValidationException |
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* |
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* @return void Returns nothing but only returns when the data is valid. Otherwise an exception is thrown. |
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*/ |
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public static function checkArray(array $data, array $types, bool $complete = true): void |
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{ |
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foreach ($types as $key => $type) { |
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$type = self::parseType($type, $key, $optional, $nullable); |
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if (array_key_exists($key, $data)) { |
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self::validateDataKey($data[$key], $key, $type, $nullable); |
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unset($data[$key]); |
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} elseif (!$optional) { |
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throw new DataValidationException(sprintf('Required key "%s" is missing in data.', $key)); |
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} |
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} |
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if ($complete && \count($data) !== 0) { |
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throw new DataValidationException(sprintf('Unexpected fields in data (%s).', implode(', ', array_keys($data)))); |
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} |
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} |
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private static function validateDataKey($value, $key, string $type, bool $nullable): void |
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{ |
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if ($nullable && $value === null) { |
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return; |
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} |
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$actualType = gettype($value); |
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if ($actualType === 'object') { |
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$actualType = get_class($value); |
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} |
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if ($actualType !== $type) { |
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throw new DataValidationException(sprintf('Expecting key "%s" to be of type "%s" but has type "%s".', $key, $type, $actualType)); |
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} |
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} |
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private static function parseType(string $type, $key, bool &$optional = null, bool &$nullable = null) |
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{ |
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$optional = false; |
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$nullable = false; |
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if ($type === '') { |
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throw new DataValidationException(sprintf('Invalid type "%s" for key "%s".', $type, (string) $key)); |
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} |
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if ($type[0] === '?') { |
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$optional = true; |
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$type = substr($type, 1); |
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} |
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if ($type[0] === ':') { // TODO tests |
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$nullable = true; |
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$type = substr($type, 1); |
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} |
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return $type; |
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} |
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} |
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