Merge pull request #1483 from nextcloud/fix/reduce-totp-secret-to-160…

…-bits

fix: reduce secret size to 160 bits

lib/Service/Totp.php

@@ -72,7 +72,7 @@ public function hasSecret(IUser $user): bool {
 	}
 
 	private function generateSecret(): string {
-		return $this->random->generate(160, ISecureRandom::CHAR_UPPER.'234567');
+		return $this->random->generate(32, ISecureRandom::CHAR_UPPER.'234567');
 	}
 
 	/**