[Kolab-devel] Invalid characters in mailbox name

[Alain Spineux]

Hello

I was trying to understand why I was able to create a mailbox named
foo%bar at domain.com
but not able to use this identifier to setup acl like in

setacl another at domain.com foo%bar at domain.com lrswipcda

This command return 'Invalid identifier' !

This is because imapd try to validate 'foo%bar at domain.com' like a valid
"identifier"
and not solely as a valid "domain root" mailbox.

Looking further into the imap sources, I found some info!
Here they are.
You can see some other character invalid in "email address" that KOLAB
should not be able to manage.
But some of them are accepted in folder name :-)

Hope someone will find this info usefull

cyrus-imapd-2.3.1/ptclient/ldap.c

/* Map of which characters are allowed by auth_canonifyid.
 * Key: 0 -> not allowed (special, ctrl, or would confuse Unix or imapd)
 *      1 -> allowed, but requires an alpha somewhere else in the string
 *      2 -> allowed, and is an alpha
 *
 * At least one character must be an alpha.
 *
 * This may not be restrictive enough.
 * Here are the reasons for the restrictions:
 *
 * &    forbidden because of MUTF-7.  (This could be fixed.)
 * :    forbidden because it's special in /etc/passwd
 * /    forbidden because it can't be used in a mailbox name
 * * %  forbidden because they're IMAP magic in the LIST/LSUB commands
 * ?    it just scares me
 * ctrl chars, DEL
 *      can't send them as IMAP characters in plain folder names, I think
 * 80-FF forbidden because you can't send them in IMAP anyway
 *       (and they're forbidden as folder names). (This could be fixed.)
 *
 * + and - are *allowed* although '+' is probably used for userid+detail
 * subaddressing and qmail users use '-' for subaddressing.
 *
 * Identifiers don't require a digit, really, so that should probably be
 * relaxed, too.
 */
static char allowedchars[256] = {
 /* 0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F */
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 00-0F */
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 10-1F */
    1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, /* 20-2F */
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, /* 30-3F */

    1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 40-4F */
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, /* 50-5F */
    1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 60-6F */
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 0, /* 70-7F */

    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};


-- 
--
Alain Spineux
aspineux gmail com
May the sources be with you
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