~mdw / exim-config / blame
| Commit | Line | Data |
|---|---|---|
| 185b5456 MW |
1 | ### -*-m4-*- |
| 2 | ### | |
| 3 | ### Client authentication for distorted.org.uk Exim configuration | |
| 4 | ### | |
| 5 | ### (c) 2012 Mark Wooding | |
| 6 | ### | |
| 7 | ||
| 8 | ###----- Licensing notice --------------------------------------------------- | |
| 9 | ### | |
| 10 | ### This program is free software; you can redistribute it and/or modify | |
| 11 | ### it under the terms of the GNU General Public License as published by | |
| 12 | ### the Free Software Foundation; either version 2 of the License, or | |
| 13 | ### (at your option) any later version. | |
| 14 | ### | |
| 15 | ### This program is distributed in the hope that it will be useful, | |
| 16 | ### but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | ### GNU General Public License for more details. | |
| 19 | ### | |
| 20 | ### You should have received a copy of the GNU General Public License | |
| 21 | ### along with this program; if not, write to the Free Software Foundation, | |
| 22 | ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| 23 | ||
| 24 | ###-------------------------------------------------------------------------- | |
| 25 | ### Authenticators. | |
| 26 | ||
| 27 | m4_define(<:CHECK_PASSWD:>, | |
| 28 | <:${lookup {$1} lsearch {CONF_sysconf_dir/passwd} \ | |
| 29 | {${if crypteq {$2} {$value}}} \ | |
| 30 | {false}}:>) | |
| 31 | ||
| 32 | m4_define(<:ALLOW_PLAINTEXT_AUTH_P:>, | |
| 4ff4ad42 | 33 | <:or {{match_ip {$sender_host_address}{+thishost}} \ |
| 185b5456 MW |
34 | {and {{def:tls_cipher} {eq{$acl_c_mode}{submission}}}}}:>) |
| 35 | ||
| 36 | SECTION(auth)m4_dnl | |
| 37 | plain: | |
| 38 | driver = plaintext | |
| 39 | public_name = PLAIN | |
| 40 | server_advertise_condition = ${if ALLOW_PLAINTEXT_AUTH_P} | |
| 41 | server_prompts = : | |
| 42 | server_condition = CHECK_PASSWD($auth2, $auth3) | |
| 43 | server_set_id = $auth2 | |
| 44 | ||
| 45 | login: | |
| 46 | driver = plaintext | |
| 47 | public_name = LOGIN | |
| 48 | server_advertise_condition = ${if ALLOW_PLAINTEXT_AUTH_P} | |
| 49 | server_prompts = <; Username: ; Password: | |
| 50 | server_condition = CHECK_PASSWD($auth1, $auth2) | |
| 51 | server_set_id = $auth1 | |
| 52 | ||
| 185b5456 MW |
53 | DIVERT(null) |
| 54 | ###-------------------------------------------------------------------------- | |
| 55 | ### Dealing with `AUTH' parameters and relaying. | |
| 56 | ||
| 57 | SECTION(global, acl)m4_dnl | |
| 58 | acl_smtp_mailauth = mailauth | |
| 59 | SECTION(acl, misc)m4_dnl | |
| 60 | ## Check the `AUTH=...' parameter to a `MAIL' command. | |
| 61 | mailauth: | |
| 62 | ## If the client has authenticated using TLS then we're OK. The | |
| 63 | ## sender was presumably checked upstream, and we can believe that | |
| 64 | ## the name has been transmitted honestly. | |
| 65 | accept condition = ${if def:tls_peerdn} | |
| 66 | ||
| 67 | ## If this is submission, and the client has authenticated, then we | |
| 68 | ## check that the name matches the user. | |
| 69 | accept condition = ${if eq {$authenticated_sender} \ | |
| 70 | {$authenticated_id@CONF_master_domain}} | |
| 71 | ||
| 72 | ## Otherwise we can't tell who really sent it. | |
| 73 | deny message = Authenticated user not authoritative for claimed sender. | |
| 74 | ||
| 75 | DIVERT(null) | |
| 76 | ###----- That's all, folks -------------------------------------------------- |