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[Dovecot] Bug? 1.0.0-test28 NFS locking problems
by Tim Southerwood 24 Jul '04

24 Jul '04

Hi Slight problem - linux 2.4 running dovecot, Solaris 2.8 home directory server. Full lockd support etc. I had to make the following code patches (at end of mail for clarity) to get dovecot to read the users mbox files at all. 1) fcntl with F_SETLKW will not work against a Solaris 2.8 server as proved with a small test program. Other forms of fcntl (ie F_SETLK) are OK. I noticed there are some code witches, but setting mbox_lock_timeout=0 only seems to knock one of the fcntl's over to F_SETLK 2) O_CREAT | O_EXCL are documented not to work over NFS properly (see man open(2) on linux). So I knocked out the O_EXCL and combined with (1) dovecot will talk over NFS to remote mbox files. THESE ARE NOT VIABLE CODE PATCHES They illustrate a problem I found - they are hackish and totally wrong. I'm not sure of the best way to correct this problem cleanly, so I am just submitting it as a potential bug. Cheers Tim Southerwood ************************************************** --- dovecot-1.0-test28/src/lib/file-lock.c.orig 2004-07-20 14:29:47.000000000 +0100 +++ dovecot-1.0-test28/src/lib/file-lock.c 2004-07-20 14:30:15.000000000 +0100 @@ -38,7 +38,7 @@ fl.l_start = 0; fl.l_len = 0; - while (fcntl(fd, timeout != 0 ? F_SETLKW : F_SETLK, &fl) < 0) { + while (fcntl(fd, timeout != 0 ? F_SETLK : F_SETLK, &fl) < 0) { if (timeout == 0 && (errno == EACCES || errno == EAGAIN)) return 0; --- dovecot-1.0-test28/src/lib-storage/index/mbox/mbox-lock.c.orig 2004-07-20 14:29:54.000000000 +0100 +++ dovecot-1.0-test28/src/lib-storage/index/mbox/mbox-lock.c 2004-07-20 14:30:35.000000000 +0100 @@ -361,7 +361,7 @@ fl.l_start = 0; fl.l_len = 0; - wait_type = max_wait_time == 0 ? F_SETLK : F_SETLKW; + wait_type = max_wait_time == 0 ? F_SETLK : F_SETLK; while (fcntl(ctx->ibox->mbox_fd, wait_type, &fl) < 0) { if (errno != EINTR) { if (errno != EAGAIN && errno != EACCES) ************************************************** and ************************************************** diff -NaurbB dovecot-1.0-test28.orig/src/lib/file-dotlock.c dovecot-1.0-test28/src/lib/file-dotlock.c--- dovecot-1.0-test28.orig/src/lib/file-dotlock.c 2004-06-28 18:28:01.000000000 +0100+++ dovecot-1.0-test28/src/lib/file-dotlock.c 2004-07-20 14:50:33.000000000 +0100 @@ -192,7 +192,7 @@ return -1; } - fd = open(*path_r, O_RDWR | O_EXCL | O_CREAT, 0666); + fd = open(*path_r, O_RDWR | O_CREAT, 0666); if (fd != -1) return fd; diff -NaurbB dovecot-1.0-test28.orig/src/lib-storage/index/maildir/maildir-util.c dovecot-1.0-test28/src/lib-storage/index/maildir/maildir-util.c--- dovecot-1.0-test28.orig/src/lib-storage/index/maildir/maildir-util.c 2004-06-16 01:50:41.000000000 +0100+++ dovecot-1.0-test28/src/lib-storage/index/maildir/maildir-util.c 2004-07-20 14:51:25.000000000 +0100@@ -241,7 +241,7 @@ if (stat(path, &st) < 0 && errno == ENOENT) { /* doesn't exist */ mode_t old_mask = umask(0); - fd = open(path, O_WRONLY | O_CREAT | O_EXCL, mode); + fd = open(path, O_WRONLY | O_CREAT, mode); umask(old_mask); if (fd != -1 || errno != EEXIST) break; diff -NaurbB dovecot-1.0-test28.orig/src/lib-storage/index/mbox/mbox-storage.c dovecot-1.0-test28/src/lib-storage/index/mbox/mbox-storage.c--- dovecot-1.0-test28.orig/src/lib-storage/index/mbox/mbox-storage.c 2004-07-20 14:45:55.000000000 +0100+++ dovecot-1.0-test28/src/lib-storage/index/mbox/mbox-storage.c 2004-07-20 14:49:56.000000000 +0100@@ -386,7 +386,7 @@ int fd; /* make sure inbox file itself exists */ - fd = open(storage->inbox_path, O_RDWR | O_CREAT | O_EXCL, 0660); + fd = open(storage->inbox_path, O_RDWR | O_CREAT, 0660); if (fd != -1) (void)close(fd); @@ -579,7 +579,7 @@ } /* create the mailbox file */ - fd = open(path, O_RDWR | O_CREAT | O_EXCL, 0660); + fd = open(path, O_RDWR | O_CREAT, 0660); if (fd != -1) { (void)close(fd); return 0; diff -NaurbB dovecot-1.0-test28.orig/src/lib-storage/index/mbox/mbox-storage.c.mbox dovecot-1.0-test28/src/lib-storage/index/mbox/mbox-storage.c.mbox--- dovecot-1.0-test28.orig/src/lib-storage/index/mbox/mbox-storage.c.mbox 2004-07-11 22:03:09.000000000 +0100+++ dovecot-1.0-test28/src/lib-storage/index/mbox/mbox-storage.c.mbox 2004-07-20 14:50:58.000000000 +0100@@ -386,7 +386,7 @@ int fd; /* make sure inbox file itself exists */ - fd = open(storage->inbox_path, O_RDWR | O_CREAT | O_EXCL, 0660); + fd = open(storage->inbox_path, O_RDWR | O_CREAT, 0660); if (fd != -1) (void)close(fd); @@ -579,7 +579,7 @@ } /* create the mailbox file */ - fd = open(path, O_RDWR | O_CREAT | O_EXCL, 0660); + fd = open(path, O_RDWR | O_CREAT, 0660); if (fd != -1) { (void)close(fd); return 0; ************************************************** -- Tim J Southerwood Senior Programmer CSG, Dept of Computing, Imperial College, London

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[Dovecot] (no subject)
by Lorenzo Conti 23 Jul '04

23 Jul '04

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[Dovecot] RFE: MD5 encryption with for plain text passwords
by Felix Schwarz 23 Jul '04

23 Jul '04

Hi, due to compatibility issues with mail clients I think I have to use plain text authentication. In order to secure the passwords during their transport I'll use SSL encryption. After reading some documentation I think that I'll have to store the passwords as plain text in the authdb. That is something I dislike very much as it is a (imho) good tradition for unix to store only encrypted passwords for security reasons. I would like to see the possibility in dovecot to store the passwords for plain text authentication md5 encrypted. That should be easy to implement (just one md5 encryption before comparing the given password with the stored one) and could improve security. As this would be an api change it should be made configurable (and in the first versions this setting should default to the actual behavior). How do you like this idea? Maybe I can provide a patch but I won't work on this if you won't include it within dovecot at all. And last but not least I want to thank you for your great support! I really appreciate it! :-) -- Felix

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[Dovecot] CRAM-MD5
by Felix Schwarz 23 Jul '04

23 Jul '04

Hi, after getting dovecot working with PostgreSQL and plaintext passwords I tried to use md5 encrypted passwords with mozilla. www.roughtrade.net/dovecot says that Mozilla only supports CRAM-MD5 and that CRAM-MD5 is included in HEAD. Now I have two questions: 1) Is the md5 hash stored in passdb with cram-md5 the same as in digest-md5? 2) Is a new dovecot stable build planned within the next two weeks (which includes CRAM-MD5)? (I guess the answer is no :-( 3) Are there any dovecot rpms with pgsql and CRAM-md5 supprt? -- Felix

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Re: [Dovecot] Dovecot auth problem on FreeBSD 4.10
by Viren Patel 22 Jul '04

22 Jul '04

> On Thu, 2004-07-22 at 20:35, Viren Patel wrote: >> Hope this helps. Should I send the entire socket.h file? > > Hmm. What would happen if in src/lib/fdpass.c you added: > > #undef CMSG_LEN > #undef CMSG_DATA > > #define CMSG_LEN(l) (sizeof(struct cmsghdr) + (l)) > #define CMSG_DATA(cmsg) ((u_char *)(cmsg) + sizeof(struct cmsghdr)) > > Yes! This did the trick. It seems to be working fine now. Thanks for your help. I can now go on to further testing and imaps/pop3s. I am seriously looking at Dovecot for our production mail server. Viren Patel University of Texas at Austin

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[Dovecot] Dovecot auth problem on FreeBSD 4.10
by Viren Patel 22 Jul '04

22 Jul '04

Hello. I am trying to setup Dovecot on an Alpha running FreeBSD 4.10. I am simply trying the imap/pop3 protocols at this time. But with both protocols the log message I get is: pop3-login: fd_send(5) failed: Bad file descriptor dovecot: child 275 (login) returned error 89 or imap-login: fd_send(5) failed: Bad file descriptor dovecot: child 275 (login) returned error 89 I have tried various combinations of: auth = default|plain|pam auth_userdb = passwd auth_passdb = passwd|shadow|pam|passwd-file but nothing works. What am I doing wrong? Thanks. Viren Patel University of Texas at Austin

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[Dovecot] help: The current command did not succeed. The mail server responded: Invalid mask.
by Ivo Rütsche 22 Jul '04

22 Jul '04

on your mozilla client: go to "Edit" / "Mail & Newsgroups Account Settings" / [your account] / "Server Settings" / "Advanced..." / "IMAP" / "Other Users" make sure your text box is empty (default is "~") bye ivo

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[Dovecot] One final issue
by Tom Ray [Lists] 22 Jul '04

22 Jul '04

Timo- Thanks for all the help. After I changed the permissions to the virtual user I setup I had a few small issues but was able to work through them. Now IMAP is running great. But my new question is, do I need to do anything to get it to work with POP? My server refuses to respond on 110 and I'm wondering if there is something I need to do? I was under the impression that Dovecot can handle both POP/IMAP requests. TIA Tom

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[Dovecot] [PATCH] add LOGIN authentication mechanism
by Andrey Panin 22 Jul '04

22 Jul '04

Hello, attached patch (1.0-test29) adds LOGIN authentication mechanism. Tested with KMail and seems working. Please consider applying. Best regards. P.S. I also have NTLM authentication working and plan to submit it RSN. -- Andrey Panin | Linux and UNIX system administrator pazke(a)donpac.ru | PGP key: wwwkeys.pgp.net

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[Dovecot] Authentification with PostgreSQL
by Felix.Schwarz＠web.de 22 Jul '04

22 Jul '04

Hi all, I found Dag Wieers' Fedora Core 2 rpm on http://dag.wieers.com/packages/dovecot/ and installed it. Now dovecot-auth isn't complaining anymore about an unknown userdb type but I can't get authentication working. /etc/dovecot.conf (...) # Authentication process name. auth = default # plain digest-md5 anonymous auth_mechanisms = plain auth_userdb = pgsql /etc/dovecot-pgsql.conf auth_userdb = pgsql /etc/dovecot-pgsql.conf auth_user = root auth_verbose = yes (...) /etc/dovecot-pgsql.conf connect = host=localhost dbname=xams-dovecot user=dovecot password=hallo default_pass_scheme = PLAIN password_query = SELECT password FROM users WHERE username = '%u' user_query = SELECT home, uid, gid FROM users WHERE username = '%u' If I try to login over imap (no ssl) with Mozilla Mail, authentification will always fail (username: felix(a)schwarz-online.org, password: "hallo"). /var/log/syslog Jul 22 15:48:47 steinchen postgres[2057]: [30-1] DEBUG: forked new backend, pid=2198 socket=10 Jul 22 15:48:47 steinchen postgres[2198]: [31-1] DEBUG: Passwortpaket erhalten Jul 22 15:48:47 steinchen postgres[2198]: [32-1] LOG: Verbindung authorisiert: Benutzer=dovecot Datenbank=xams-dovecot (...) Jul 22 15:51:15 steinchen dovecot(pam_unix)[2210]: check pass; user unknown Jul 22 15:51:15 steinchen dovecot(pam_unix)[2210]: authentication failure; logname= uid=0 euid=0 tty= ruser= rhost= /var/log/dovecot.log dovecot: Jul 22 15:48:46 Info: Dovecot starting up dovecot-auth: Jul 22 15:51:18 Info: PAM: pam_authenticate(felix(a)schwarz-online.org) failed: Authentication failure $ psql -d xams-dovecot dovecot xams-dovecot-> SELECT password FROM users WHERE username = 'felix(a)schwarz-online.org'; password ---------- hallo xams-dovecot=> SELECT home, uid, gid FROM users WHERE username = 'felix(a)schwarz-online.org'; home | uid | gid ----------+-----+----- /home/fs | 500 | 500 What is wrong? Password encryption? Is there a possibility to see what dovecot gets from Mozilla and what are the expected results of the sql queries? I am stuck as I don't know exactely why authentification failes... thanks for your help -- Felix

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