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| 1 | <?php | |
| 2 | ||
| 3 | require 'PasswordHash.php'; | |
| 4 | ||
| 5 | // Base-2 logarithm of the iteration count used for password stretching | |
| 6 | $hash_cost_log2 = 8; | |
| 7 | // Do we require the hashes to be portable to older systems (less secure)? | |
| 8 | $hash_portable = FALSE; | |
| 9 | ||
| 10 | // Are we debugging this code? If enabled, OK to leak server setup details. | |
| 11 | $debug = TRUE; | |
| 12 | ||
| 13 | function fail($pub, $pvt = '') | |
| 14 | {
| |
| 15 | global $debug; | |
| 16 | $msg = $pub; | |
| 17 | if ($debug && $pvt !== '') | |
| 18 | $msg .= ": $pvt"; | |
| 19 | /* The $pvt debugging messages may contain characters that would need to be | |
| 20 | * quoted if we were producing HTML output, like we would be in a real app, | |
| 21 | * but we're using text/plain here. Also, $debug is meant to be disabled on | |
| 22 | * a "production install" to avoid leaking server setup details. */ | |
| 23 | exit("An error occurred ($msg).\n");
| |
| 24 | } | |
| 25 | ||
| 26 | function get_post_var($var) | |
| 27 | {
| |
| 28 | $val = $_POST[$var]; | |
| 29 | if (get_magic_quotes_gpc()) | |
| 30 | $val = stripslashes($val); | |
| 31 | return $val; | |
| 32 | } | |
| 33 | ||
| 34 | header('Content-Type: text/plain');
| |
| 35 | ||
| 36 | $op = $_POST['op']; | |
| 37 | if ($op !== 'new' && $op !== 'login' && $op !== 'change') | |
| 38 | fail('Unknown request');
| |
| 39 | ||
| 40 | $user = get_post_var('user');
| |
| 41 | /* Sanity-check the username, don't rely on our use of prepared statements | |
| 42 | * alone to prevent attacks on the SQL server via malicious usernames. */ | |
| 43 | if (!preg_match('/^[a-zA-Z0-9_]{1,60}$/', $user))
| |
| 44 | fail('Invalid username');
| |
| 45 | ||
| 46 | $pass = get_post_var('pass');
| |
| 47 | /* Don't let them spend more of our CPU time than we were willing to. | |
| 48 | * Besides, bcrypt happens to use the first 72 characters only anyway. */ | |
| 49 | if (strlen($pass) > 72) | |
| 50 | fail('The supplied password is too long');
| |
| 51 | ||
| 52 | $conn_string = "host=localhost port=5432 dbname=mytestingdb user=mytestaccount password=mysecretpass";// In a real application, should be in a config file instead | |
| 53 | $dbconn = pg_connect($conn_string) or die("Could not connect");
| |
| 54 | $stat = pg_connection_status($dbconn); | |
| 55 | if ($stat === PGSQL_CONNECTION_OK) {
| |
| 56 | echo 'Connection status ok '; | |
| 57 | } else {
| |
| 58 | echo 'Connection status bad '; | |
| 59 | } | |
| 60 | ||
| 61 | $hasher = new PasswordHash($hash_cost_log2, $hash_portable); | |
| 62 | ||
| 63 | if ($op === 'new') {
| |
| 64 | $hash = $hasher->HashPassword($pass); | |
| 65 | if (strlen($hash) < 20) | |
| 66 | fail('Failed to hash new password');
| |
| 67 | unset($hasher); | |
| 68 | ||
| 69 | // Prepare a query for execution | |
| 70 | $result = pg_prepare($dbconn, "my_query", 'INSERT INTO users VALUES($1, $2)') or fail('pg_prepare failed ',pg_last_error($dbconn));
| |
| 71 | ||
| 72 | if (!pg_execute($dbconn, "my_query", array($user, $hash))) {
| |
| 73 | /* Figure out why this failed - maybe the username is already taken? | |
| 74 | * It could be more reliable/portable to issue a SELECT query here. We would | |
| 75 | * definitely need to do that (or at least include code to do it) if we were | |
| 76 | * supporting multiple kinds of database backends, not just MySQL. However, | |
| 77 | * the prepared statements interface we're using is MySQL-specific anyway. */ | |
| 78 | if (pg_last_error($dbconn) === 1062 /* ER_DUP_ENTRY */) | |
| 79 | fail('This username is already taken');
| |
| 80 | else | |
| 81 | fail('pg_execute failed ',pg_last_error($dbconn));
| |
| 82 | } | |
| 83 | ||
| 84 | $what = 'User created'; | |
| 85 | } else {
| |
| 86 | $hash = '*'; // In case the user is not found | |
| 87 | pg_prepare($dbconn, "quser", 'SELECT pass FROM users WHERE pk_users=$1') or fail('pg_prepare failed ',pg_last_error($dbconn));
| |
| 88 | $hashx = pg_execute($dbconn, "quser", array($user)) or fail('pg_execute failed ',pg_last_error($dbconn));
| |
| 89 | $hash = pg_fetch_result($hashx, 0, 'pass'); | |
| 90 | ||
| 91 | if (!$hash && pg_last_error($dbconn)) | |
| 92 | fail('pg_execute failed.2 ',pg_last_error($dbconn));
| |
| 93 | ||
| 94 | if ($hasher->CheckPassword($pass, $hash)) {
| |
| 95 | $what = 'Authentication succeeded'; | |
| 96 | } else {
| |
| 97 | $what = 'Authentication failed'; | |
| 98 | $op = 'fail'; // Definitely not 'change' | |
| 99 | } | |
| 100 | ||
| 101 | if ($op === 'change') {
| |
| 102 | - | $stmt->close(); |
| 102 | + | |
| 103 | $newpass = get_post_var('newpass');
| |
| 104 | if (strlen($newpass) > 72) | |
| 105 | fail('The new password is too long');
| |
| 106 | $hash = $hasher->HashPassword($newpass); | |
| 107 | if (strlen($hash) < 20) | |
| 108 | fail('Failed to hash new password');
| |
| 109 | unset($hasher); | |
| 110 | ||
| 111 | pg_prepare($dbconn, "qupuser", 'UPDATE users SET pass=$1 WHERE pk_users=$2') or fail('pg_prepare failed.3 ',pg_last_error($dbconn));
| |
| 112 | pg_execute($dbconn, "qupuser", array($hash,$user)) or fail('pg_execute failed.3 ',pg_last_error($dbconn));
| |
| 113 | ||
| 114 | $what = 'Password changed'; | |
| 115 | } | |
| 116 | ||
| 117 | unset($hasher); | |
| 118 | } | |
| 119 | ||
| 120 | pg_close($dbconn); | |
| 121 | ||
| 122 | echo "$what\n"; | |
| 123 | ||
| 124 | ?> |
