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| 1 | <?php |
| 2 | /** |
| 3 | * Saves the expiring autologin code as a WordPress transient. |
| 4 | * |
| 5 | * @link https://BrianHenry.ie |
| 6 | * @since 1.2.1 |
| 7 | * |
| 8 | * @package bh-wp-autologin-urls |
| 9 | */ |
| 10 | |
| 11 | namespace BrianHenryIE\WP_Autologin_URLs\API\Data_Stores; |
| 12 | |
| 13 | use BrianHenryIE\WP_Autologin_URLs\API\Data_Store_Interface; |
| 14 | use DateTimeInterface; |
| 15 | use Psr\Log\LoggerAwareTrait; |
| 16 | use Psr\Log\LoggerInterface; |
| 17 | |
| 18 | /** |
| 19 | * Deprecated class that uses WordPress transients for storage. Less reliable than a custom database table, |
| 20 | * but potentially useful for many use cases. |
| 21 | */ |
| 22 | class Transient_Data_Store implements Data_Store_Interface { |
| 23 | use LoggerAwareTrait; |
| 24 | |
| 25 | /** |
| 26 | * Constructor. |
| 27 | * |
| 28 | * @param LoggerInterface $logger A PSR logger. |
| 29 | */ |
| 30 | public function __construct( LoggerInterface $logger ) { |
| 31 | $this->setLogger( $logger ); |
| 32 | } |
| 33 | |
| 34 | public const TRANSIENT_PREFIX = 'bh_autologin_'; |
| 35 | |
| 36 | /** |
| 37 | * Save the hashed password and hashed value of user_id and password as a WordPress transient. |
| 38 | * |
| 39 | * @param int $user_id The user id for the password being saved. |
| 40 | * @param string $code The unhashed password. |
| 41 | * @param int $expires_in Number of seconds until the password should expire. |
| 42 | */ |
| 43 | public function save( int $user_id, string $code, int $expires_in ): void { |
| 44 | |
| 45 | // In the unlikely event there is a collision, someone won't get to log in. Oh well. |
| 46 | $transient_name = self::TRANSIENT_PREFIX . hash( 'sha256', $code ); |
| 47 | |
| 48 | // Concatenate $user_id and $password so the database cannot be searched by username. |
| 49 | $value = hash( 'sha256', $user_id . $code ); |
| 50 | |
| 51 | // This could return false if not set. |
| 52 | set_transient( $transient_name, $value, $expires_in ); |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Return the hashed value corresponding to the inputted autologin code, or null if none is found. |
| 57 | * |
| 58 | * Deletes the transient when found, so autologin codes can only be used once. |
| 59 | * |
| 60 | * @param string $code The code as supplied to the user, which has never been saved by us. |
| 61 | * @param bool $delete Should the code be expiried immediately after use. |
| 62 | * |
| 63 | * @return string|null |
| 64 | */ |
| 65 | public function get_value_for_code( string $code, bool $delete = true ): ?string { |
| 66 | |
| 67 | $transient_name = self::TRANSIENT_PREFIX . hash( 'sha256', $code ); |
| 68 | |
| 69 | $value = get_transient( $transient_name ); |
| 70 | |
| 71 | if ( false === $value ) { |
| 72 | return null; |
| 73 | } |
| 74 | |
| 75 | if ( $delete ) { |
| 76 | delete_transient( $transient_name ); |
| 77 | } |
| 78 | |
| 79 | return $value; |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Delete codes that are no longer valid. |
| 84 | * |
| 85 | * @param DateTimeInterface $before The date from which to purge old codes. |
| 86 | * |
| 87 | * @return array{deleted_count:int|null} |
| 88 | */ |
| 89 | public function delete_expired_codes( DateTimeInterface $before ): array { |
| 90 | return array( |
| 91 | 'deleted_count' => null, |
| 92 | 'message' => 'Transients auto-delete', |
| 93 | ); |
| 94 | } |
| 95 | } |