Cannot list folders when a folder contains "

[cedric-anne]

Bug Report

Q	A
Version(s)	2.16.0

Summary

When a folder contains " at the end of its name, the Laminas\Mail\Storage\Imap::getFolders() method fails due to an infinite loop in Laminas\Mail\Protocol\Imap::decodeLine().

Current behavior

Here is an extract of the request/response stack.

< * OK The Microsoft Exchange IMAP4 service is ready.
> TAG1 LOGIN "****@****/****" "********"
< TAG1 OK LOGIN completed.
> TAG2 SELECT "INBOX"
< * 449 EXISTS
< * 0 RECENT
< * FLAGS (\Seen \Answered \Flagged \Deleted \Draft $MDNSent)
< * OK [PERMANENTFLAGS (\Seen \Answered \Flagged \Deleted \Draft $MDNSent)] Permanent flags
< * OK [UNSEEN 57] Is the first unseen message
< * OK [UIDVALIDITY 14] UIDVALIDITY value
< * OK [UIDNEXT 4928] The next unique identifier value
< TAG2 OK [READ-WRITE] SELECT completed.
> TAG3 LIST "" "*"
< * LIST (\HasNoChildren) "/" Calendar
> TAG4 LOGOUT
< * LIST (\HasChildren) "/" Contacts
< * LIST (\HasNoChildren \Trash) "/" "Deleted Items"
< * LIST (\HasNoChildren \Drafts) "/" Drafts
< * LIST (\Marked \HasChildren) "/" INBOX
< * LIST (\HasChildren) "/" "INBOX/&AOA- trier"
< * LIST (\HasNoChildren) "/" "INBOX/&AOA- trier/_DONE/2021/2021-08/2021-08-17/2021-08-17_Printer &- Login"
< * LIST (\HasNoChildren) "/" "INBOX/&AOA- trier/_DONE/2021/2021-08/2021-08-17/2021-08-17_Webmail"
< * LIST (\HasNoChildren) "/" {57}
< INBOX/&AOA- trier/_DONE/2021/2021-08/2021-08-18_Ecran 27"
< * LIST (\HasNoChildren) "/" "INBOX/&AOA- trier/_DONE/2021/2021-08/2021-08-19_Download .msg file"
< * LIST (\HasNoChildren) "/" Journal
< * LIST (\HasNoChildren \Junk) "/" "Junk Email"
< * LIST (\HasNoChildren) "/" Notes
< * LIST (\HasNoChildren) "/" Outbox
< * LIST (\HasNoChildren) "/" Sent
< * LIST (\HasNoChildren \Sent) "/" "Sent Items"
< * LIST (\HasNoChildren) "/" Tasks
< * LIST (\HasChildren) "/" Trash
< * LIST (\HasNoChildren) "/" Trash/TEST
< TAG3 OK LIST completed.
< * BYE Microsoft Exchange Server 2016 IMAP4 server signing off.
< TAG4 OK LOGOUT completed.

The directory that contains " is returned on 2 distinct lines, using the literal notation.

< * LIST (\HasNoChildren) "/" {57}
< INBOX/&AOA- trier/_DONE/2021/2021-08/2021-08-18_Ecran 27"

How to reproduce

Call Laminas\Mail\Storage\Imap::getFolders() on a mailbox that has a folder that ends with a ".

Expected behavior

Should not produce an infinite loop in Laminas\Mail\Protocol\Imap::decodeLine().