doc/authentication.txt

   1 **********************************************
   2 IMAP AND SMTP AUTHENTICATION WITH SQUIRRELMAIL
   3 Preliminary documentation - 6 Dec 2002
   4 Chris Hilts chilts@birdbrained.org
   5 **********************************************
   6
   7 Prior to SquirrelMail 1.3.3, only plaintext logins for IMAP and SMTP were
   8 supported.  With the release of SquirrelMail 1.3.3, support for the
   9 CRAM-MD5 and DIGEST-MD5 auth mechanisms has been added.  TLS support has
  10 also been added.  It is possible to use different methods for both IMAP and
  11 SMTP. TLS is able to be enabled on a per-service basis as well.
  12 Unless the administrator changes the authentication methods, SquirrelMail
  13 will default to the "classic" plaintext methods, without TLS.
  14
  15 REQUIREMENTS
  16 ------------
  17
  18 CRAM/DIGEST-MD5
  19 * SquirrelMail 1.3.3 or higher
  20 * If you have the mhash extension to PHP, it will automatically
  21   be used, which may help performance on heavily loaded servers.
  22   ** NOTE: mhash is optional and no longer a requirement **
  23
  24 TLS
  25 * SquirrelMail 1.3.3 or higher
  26 * PHP 4.3.0 or higher
  27 * The "STARTTLS" command is NOT supported.  The server you wish to use TLS
  28   on must have a dedicated port listening for TLS connections. (ie. port
  29   993 for IMAP, 465 for SMTP)
  30
  31 CONFIGURATION
  32 -------------
  33
  34 All configuration is done using conf.pl, under main menu option #2.
  35
  36 KNOWN ISSUES
  37 ------------
  38
  39 DIGEST-MD5 has three different methods of operation. (qop options "auth",
  40 "auth-int" and "auth-conf").  This implementation currently supports "auth"
  41 only.  Work is being done to add the other two modes.
  42
  43 DIGEST-MD5 _may_ fail when authenticating with servers that supply more
  44 than one "realm".  I have no servers of this type to test on, so if you do
  45 and it fails, let me know!  (A big help would be for you to telnet to your
  46 server, start a DIGEST-MD5 auth session, and include the challenge from the
  47 server in your bug report.)
  48
  49 To get the challenge with IMAP:
  50         telnet <your server> imap
  51         [server says hello]
  52         A01 AUTHENTICATE DIGEST-MD5
  53         <copy the gobbledygook that the server sends - this is what I need>
  54         *
  55         [server says auth aborted]
  56         A02 LOGOUT
  57         [server says goodbye, closes connection]
  58
  59 To get the challenge with SMTP:
  60         telnet <your server> smtp
  61         [server sends some sort of "hello" banner]
  62         EHLO myhostname
  63         [server will probably list a bunch of capabilities]
  64         AUTH DIGEST-MD5
  65         <copy the gobbledygook that the server sends - this is what I need>
  66         *
  67         [server says auth aborted]
  68         QUIT
  69         [server says bye, closes connection]
  70
  71 [End]