added on WebSTLs (webstls.com) at 2026-07-01 22:26:44
| 1 | #!/usr/bin/perl | |
| 2 | #====================================================================== | |
| 3 | # WebSTLs -- self-service password change. | |
| 4 | # | |
| 5 | # GET /password_change.cgi -> render form | |
| 6 | # POST /password_change.cgi -> verify current pw, set new | |
| 7 | # | |
| 8 | # The POST path uses Login::update_password which both rehashes and | |
| 9 | # revokes every other active session, so an attacker holding a stolen | |
| 10 | # cookie loses access the moment the legit owner rotates their pw. | |
| 11 | #====================================================================== | |
| 12 | use strict; | |
| 13 | use warnings; | |
| 14 | ||
| 15 | use lib '/var/www/vhosts/webstls.com/httpdocs'; | |
| 16 | use CGI; | |
| 17 | use MODS::Template; | |
| 18 | use MODS::DBConnect; | |
| 19 | use MODS::Login; | |
| 20 | use MODS::WebSTLs::Config; | |
| 21 | use MODS::WebSTLs::Wrapper; | |
| 22 | ||
| 23 | $|=1; | |
| 24 | ||
| 25 | my $q = CGI->new; | |
| 26 | my $form = $q->Vars; | |
| 27 | my $auth = MODS::Login->new; | |
| 28 | my $tfile = MODS::Template->new; | |
| 29 | my $db = MODS::DBConnect->new; | |
| 30 | my $cfg = MODS::WebSTLs::Config->new; | |
| 31 | my $wrap = MODS::WebSTLs::Wrapper->new; | |
| 32 | my $DB = $cfg->settings('database_name'); | |
| 33 | ||
| 34 | my $userinfo = $auth->login_verify(); | |
| 35 | unless ($userinfo) { | |
| 36 | print "Status: 302 Found\nLocation: /login.cgi\n\n"; | |
| 37 | exit; | |
| 38 | } | |
| 39 | my $uid = $userinfo->{user_id}; | |
| 40 | $uid =~ s/[^0-9]//g; | |
| 41 | ||
| 42 | my $err = ''; | |
| 43 | ||
| 44 | if (($ENV{REQUEST_METHOD} || '') eq 'POST') { | |
| 45 | my $cur = $form->{current_password} // ''; | |
| 46 | my $nw = $form->{new_password} // ''; | |
| 47 | my $cf = $form->{new_password_again} // ''; | |
| 48 | ||
| 49 | if (!length($cur)) { | |
| 50 | $err = 'Current password is required.'; | |
| 51 | } | |
| 52 | elsif (length($nw) < 8) { | |
| 53 | $err = 'New password must be at least 8 characters.'; | |
| 54 | } | |
| 55 | elsif ($nw ne $cf) { | |
| 56 | $err = 'New passwords do not match.'; | |
| 57 | } | |
| 58 | elsif ($nw eq $cur) { | |
| 59 | $err = 'New password must be different from your current one.'; | |
| 60 | } | |
| 61 | else { | |
| 62 | # Pull the stored hash, verify the supplied current password | |
| 63 | # against it. Login::_verify_password handles both Argon2 and | |
| 64 | # the SHA fallback shape. | |
| 65 | my $dbh = $db->db_connect(); | |
| 66 | my $u = $db->db_readwrite($dbh, qq~ | |
| 67 | SELECT password_hash FROM `${DB}`.users WHERE id='$uid' LIMIT 1 | |
| 68 | ~, $ENV{SCRIPT_NAME}, __LINE__); | |
| 69 | $db->db_disconnect($dbh); | |
| 70 | ||
| 71 | unless ($u && length($u->{password_hash} // '') | |
| 72 | && MODS::Login::_verify_password($cur, $u->{password_hash})) { | |
| 73 | $err = 'Current password is incorrect.'; | |
| 74 | } | |
| 75 | else { | |
| 76 | # update_password rotates the hash AND revokes every other | |
| 77 | # active session. Mint a fresh session for THIS browser via | |
| 78 | # login_exec so the user does not get bounced to the login | |
| 79 | # page on the redirect that follows. | |
| 80 | if ($auth->update_password($uid, $nw)) { | |
| 81 | my ($new_userinfo, $new_token) = | |
| 82 | $auth->login_exec($userinfo->{email}, $nw); | |
| 83 | if ($new_token) { | |
| 84 | my $cookie_line = $auth->set_cookie_header($new_token); | |
| 85 | print "Status: 302 Found\n$cookie_line\nLocation: /profile.cgi?pw_changed=1#security\n\n"; | |
| 86 | exit; | |
| 87 | } | |
| 88 | # Even if re-login somehow failed the password rotation | |
| 89 | # succeeded; send them to the login page rather than | |
| 90 | # leaving them in a half-state. | |
| 91 | print "Status: 302 Found\nLocation: /login.cgi?pw_changed=1\n\n"; | |
| 92 | exit; | |
| 93 | } else { | |
| 94 | $err = 'Could not save the new password. Please try again.'; | |
| 95 | } | |
| 96 | } | |
| 97 | } | |
| 98 | } | |
| 99 | ||
| 100 | my $tvars = { | |
| 101 | email => _h($userinfo->{email} || ''), | |
| 102 | err => _h($err), | |
| 103 | has_err => length($err) ? 1 : 0, | |
| 104 | }; | |
| 105 | ||
| 106 | print "Content-Type: text/html; charset=utf-8\nCache-Control: no-store, no-cache, must-revalidate, max-age=0\nPragma: no-cache\nExpires: 0\n\n"; | |
| 107 | my $body = join('', $tfile->template('webstls_password_change.html', $tvars, $userinfo)); | |
| 108 | ||
| 109 | $wrap->render({ | |
| 110 | userinfo => $userinfo, | |
| 111 | page_key => 'my_profile', | |
| 112 | title => 'Change password', | |
| 113 | body => $body, | |
| 114 | }); | |
| 115 | exit; | |
| 116 | ||
| 117 | #====================================================================== | |
| 118 | # Helpers | |
| 119 | #====================================================================== | |
| 120 | ||
| 121 | sub _h { | |
| 122 | my $s = shift // ''; | |
| 123 | $s =~ s/&/&/g; $s =~ s/</</g; $s =~ s/>/>/g; | |
| 124 | $s =~ s/"/"/g; $s =~ s/'/'/g; | |
| 125 | return $s; | |
| 126 | } |