Don't use slow hashing to check the LDAP bindingbackport/32246/stable22

Using password_hash is expensive and should be used for hashing
passwords when saving them in the database. Here we just want to see if
the bind was already done with the given password, so use a fast hashing
algorythm.

Signed-off-by: Carl Schwan <carl@carlschwan.eu>

1 files changed, 3 insertions, 8 deletions

diff --git a/apps/user_ldap/lib/Connection.php b/apps/user_ldap/lib/Connection.php
index 4abea708a0d..bfddee56658 100644
--- a/apps/user_ldap/lib/Connection.php
+++ b/apps/user_ldap/lib/Connection.php
@@ -125,7 +125,7 @@ class Connection extends LDAPUtility {
 	protected $ignoreValidation = false;
 
 	/**
-	 * @var array{dn?: mixed, hash?: string, result?: bool}
+	 * @var array{sum?: string, result?: bool}
 	 */
 	protected $bindResult = [];
 
@@ -669,11 +669,7 @@ class Connection extends LDAPUtility {
 
 		if (
 			count($this->bindResult) !== 0
-			&& $this->bindResult['dn'] === $this->configuration->ldapAgentName
-			&& \OC::$server->getHasher()->verify(
-				$this->configPrefix . $this->configuration->ldapAgentPassword,
-				$this->bindResult['hash']
-			)
+			&& $this->bindResult['sum'] === md5($this->configuration->ldapAgentName . $this->configPrefix . $this->configuration->ldapAgentPassword)
 		) {
 			// don't attempt to bind again with the same data as before
 			// bind might have been invoked via getConnectionResource(),
@@ -686,8 +682,7 @@ class Connection extends LDAPUtility {
 										$this->configuration->ldapAgentPassword);
 
 		$this->bindResult = [
-			'dn' => $this->configuration->ldapAgentName,
-			'hash' => \OC::$server->getHasher()->hash($this->configPrefix . $this->configuration->ldapAgentPassword),
+			'sum' => md5($this->configuration->ldapAgentName . $this->configPrefix . $this->configuration->ldapAgentPassword),
 			'result' => $ldapLogin,
 		];