Add config for how many bcrypt rounds to use for password hashes

By default we leave it at the default value of 12. But now we can reduce
it for preparing users for loadtests or running integration tests.

1 files changed, 2 insertions, 1 deletions

diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index 484f719253..055d395b20 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -44,6 +44,7 @@ class AuthHandler(BaseHandler):
             LoginType.EMAIL_IDENTITY: self._check_email_identity,
             LoginType.DUMMY: self._check_dummy_auth,
         }
+        self.bcrypt_rounds = hs.config.bcrypt_rounds
         self.sessions = {}
 
     @defer.inlineCallbacks
@@ -432,7 +433,7 @@ class AuthHandler(BaseHandler):
         Returns:
             Hashed password (str).
         """
-        return bcrypt.hashpw(password, bcrypt.gensalt())
+        return bcrypt.hashpw(password, bcrypt.gensalt(self.bcrypt_rounds))
 
     def validate_hash(self, password, stored_hash):
         """Validates that self.hash(password) == stored_hash.