[Dovecot] Auth worker max line size

[Emmanuel Dreyfus]

Hello

I have been playing with some exotic authentication scheme with Dovecot
and PAM. That involves sending really large base64 encoded data as 
the IMAP password, and I have hit a line limit in Dovecot, with
AUTH_WORKER_MAX_LINE_LENGTH set to 1024.

This limit is especially frustrating since other parts of the software
use much larger limits:
MAX_INBUF_SIZE 4096
MAX_IMAP_LINE 8192
AUTH_CLIENT_MAX_LINE_LENGTH 8192

I had to make the patch attached below to get my authentication working. 
I can live with this local patch, but given the much more liberal limits 
of MAX_INBUF_SIZE at 4096 makes we wonder if this 1024 limit on
AUTH_WORKER_MAX_LINE_LENGTH could not be a bug. Or is there a security
concern at using more than 1kB?

Opinions? (please Cc: me, I'm not subscribed ot the list)

--- src/auth/auth-worker-client.h.orig  2009-06-23 18:32:15.000000000 +0200
+++ src/auth/auth-worker-client.h       2009-06-23 18:32:33.000000000 +0200
@@ -1,8 +1,8 @@
 #ifndef AUTH_WORKER_CLIENT_H
 #define AUTH_WORKER_CLIENT_H

-#define AUTH_WORKER_MAX_LINE_LENGTH 1024
+#define AUTH_WORKER_MAX_LINE_LENGTH 4096

 struct auth_worker_client *auth_worker_client_create(struct auth *auth, int fd);
 void auth_worker_client_destroy(struct auth_worker_client **client);
 void auth_worker_client_unref(struct auth_worker_client **client);





-- 
Emmanuel Dreyfus
manu at netbsd.org