commit c4e9bb71f2ce0676e2de7fb40184068bd4f5bc6a Author: Damian Johnson atagar@torproject.org Date: Wed Dec 7 08:42:10 2011 -0800

fix: cookie size check prevented multi-auth

When an exception arose in checking the cookie's size we'd always propegate that to the caller. This was a problem with multi-auth because we'd still have an alternative method of authentication to attempt (via the password). --- src/starter.py | 33 +++++++++++++++++++++++++-------- 1 files changed, 25 insertions(+), 8 deletions(-)

diff --git a/src/starter.py b/src/starter.py index 8deb500..3d74315 100644 --- a/src/starter.py +++ b/src/starter.py @@ -212,11 +212,19 @@ def _torCtlConnect(controlAddr="127.0.0.1", controlPort=9051, passphrase=None, i

if TorCtl.TorCtl.AUTH_TYPE.PASSWORD in authTypes: # password authentication, promting for the password if it wasn't provided - if passphrase: authValue = passphrase - else: - try: authValue = getpass.getpass("Controller password: ") + # + # TODO: When handling multi-auth we should try to authenticate via the + # cookie first, then fall back to prompting the user for their password. + # With the stack of fixes and hacks we have here jerry-rigging that in + # without trying cookie auth twice will be a pita so leaving this alone + # for now. Stem will handle most of this transparently, letting us handle + # this much more elegantly. + + if not passphrase: + try: passphrase = getpass.getpass("Controller password: ") except KeyboardInterrupt: return None - elif TorCtl.TorCtl.AUTH_TYPE.COOKIE in authTypes and authValue[0] != "/": + + if TorCtl.TorCtl.AUTH_TYPE.COOKIE in authTypes and authValue[0] != "/": # Connecting to the control port will probably fail if it's using cookie # authentication and the cookie path is relative (unfortunately this is # the case for TBB). This is discussed in: @@ -253,11 +261,20 @@ def _torCtlConnect(controlAddr="127.0.0.1", controlPort=9051, passphrase=None, i # # https://trac.torproject.org/projects/tor/ticket/4305

- authCookieSize = os.path.getsize(conn._cookiePath) - if authCookieSize != 32: - raise IOError("authentication cookie '%s' is the wrong size (%i bytes instead of 32)" % (conn._cookiePath, authCookieSize)) + try: + authCookieSize = os.path.getsize(conn._cookiePath) + if authCookieSize != 32: + raise IOError("authentication cookie '%s' is the wrong size (%i bytes instead of 32)" % (conn._cookiePath, authCookieSize)) + except Exception, exc: + # if the above fails then either... + # - raise an exception if cookie auth is the only method we have to + # authenticate + # - suppress the exception and try the other connection methods if we + # have alternatives + if len(authTypes) == 1: raise exc + else: conn._authTypes.remove(TorCtl.TorCtl.AUTH_TYPE.COOKIE)

- conn.authenticate(authValue) + conn.authenticate(passphrase) return conn except Exception, exc: if conn: conn.close()