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Code Issues Releases Wiki Activity

Use better secrets in generating account tokens

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Summary:
When we generate account tokens for CSRF keys and email verification, one of the inputs we use is the user's password hash. Users won't always have a password hash, so this is a weak input to key generation. This also couples CSRF weirdly with auth concerns.

Instead, give users a dedicated secret for use in token generation which is used only for this purpose.

Test Plan:
  - Ran upgrade scripts.
  - Verified all users got new secrets.
  - Created a new user.
  - Verified they got a secret.
  - Submitted CSRF'd forms, they worked.
  - Adjusted the CSRF token and submitted CSRF'd forms, verified they don't work.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D8748
This commit is contained in:
epriestley 2014-04-10 11:45:10 -07:00
parent 3018a5eb09
commit ab7d89edc8
3 changed files with 33 additions and 1 deletions
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2
resources/sql/autopatches/20140410.accountsecret.1.sql Normal file
View file

@ -0,0 +1,2 @@
ALTER TABLE {$NAMESPACE}_user.user
ADD accountSecret CHAR(64) NOT NULL COLLATE latin1_bin;

23
resources/sql/autopatches/20140410.accountsecret.2.php Normal file
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@ -0,0 +1,23 @@
<?php
echo "Updating users...\n";
foreach (new LiskMigrationIterator(new PhabricatorUser()) as $user) {
$id = $user->getID();
echo "Updating {$id}...\n";
if (strlen($user->getAccountSecret())) {
continue;
}
queryfx(
$user->establishConnection('w'),
'UPDATE %T SET accountSecret = %s WHERE id = %d',
$user->getTableName(),
Filesystem::readRandomCharacters(64),
$id);
}
echo "Done.\n";

9
src/applications/people/storage/PhabricatorUser.php
View file

@ -32,6 +32,8 @@ final class PhabricatorUser
protected $isEmailVerified = 0;
protected $isApproved = 0;
protected $accountSecret;
private $profileImage = self::ATTACHABLE;
private $profile = null;
private $status = self::ATTACHABLE;
@ -157,6 +159,11 @@ final class PhabricatorUser
if (!$this->getConduitCertificate()) {
$this->setConduitCertificate($this->generateConduitCertificate());
}
if (!strlen($this->getAccountSecret())) {
$this->setAccountSecret(Filesystem::readRandomCharacters(64));
}
$result = parent::save();
if ($this->profile) {
@ -305,7 +312,7 @@ final class PhabricatorUser
private function generateToken($epoch, $frequency, $key, $len) {
if ($this->getPHID()) {
$vec = $this->getPHID().$this->getPasswordHash();
$vec = $this->getPHID().$this->getAccountSecret();
} else {
$vec = $this->getAlternateCSRFString();
}