parameters "secured" and "valid-client-cert" when relevant.
-$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.408 2006/10/16 10:58:39 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.409 2006/10/16 13:43:21 ph10 Exp $
Change log file for Exim from version 4.21
-------------------------------------------
addresses), $smtp_active_hostname is used.
PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
- tweaks were necessary in order to get it to work:
+ tweaks were necessary in order to get it to work (see also 21 below):
(a) The code assumed that strncpy() returns a negative number on buffer
overflow, which isn't the case. Replaced with Exim's string_format()
function.
effect of slowing Exim down by computing (never used) parameters for the
RSA_EXPORT functionality.
+PH/21 On the advice of Timo Sirainen, added a check to the dovecot
+ authenticator to fail if there's a tab character in the incoming data
+ (there should never be unless someone is messing about, as it's supposed
+ to be base64-encoded). Also added, on Timo's advice, the "secured" option
+ if the connection is using TLS or if the remote IP is the same as the
+ local IP, and the "valid-client-cert option" if a client certificate has
+ been verified.
+
Exim version 4.63
-----------------
-$Cambridge: exim/doc/doc-txt/NewStuff,v 1.115 2006/10/03 15:11:22 ph10 Exp $
+$Cambridge: exim/doc/doc-txt/NewStuff,v 1.116 2006/10/16 13:43:21 ph10 Exp $
New Features in Exim
--------------------
server_name = /var/run/dovecot/auth-client
server_setid = $auth1
+ If the SMTP connection is encrypted, or if $sender_host_address is equal to
+ $interface_address (that is, the connection is local), the "secured" option
+ is passed in the Dovecot authentication command. If, for a TLS connection, a
+ client certificate has been verified, the "valid-client-cert" option is
+ passed.
+
4. The variable $message_headers_raw provides a concatenation of all the
messages's headers without any decoding. This is in contrast to
$message_headers, which does RFC2047 decoding on the header contents.
-/* $Cambridge: exim/src/src/auths/dovecot.c,v 1.1 2006/10/02 13:38:18 ph10 Exp $ */
+/* $Cambridge: exim/src/src/auths/dovecot.c,v 1.2 2006/10/16 13:43:22 ph10 Exp $ */
/*
* Copyright (c) 2004 Andrey Panin <pazke@donpac.ru>
goto out; \
} while(0)
+
+
/*************************************************
* Server entry point *
*************************************************/
struct sockaddr_un sa;
char buffer[4096];
char *args[8];
+ uschar *auth_command;
+ uschar *auth_extra_data = US"";
int nargs, tmp;
int cuid = 0, cont = 1, found = 0, fd, ret = DEFER;
FILE *f;
if (!found)
goto out;
- fprintf(f, "VERSION\t%d\t%d\nCPID\t%d\n"
- "AUTH\t%d\t%s\tservice=smtp\trip=%s\tlip=%s\tresp=%s\n",
- VERSION_MAJOR, VERSION_MINOR, getpid(), cuid,
- ablock->public_name, sender_host_address, interface_address,
- data ? (char *) data : "");
+ /* Added by PH: data must not contain tab (as it is
+ b64 it shouldn't, but check for safety). */
+
+ if (Ustrchr(data, '\t') != NULL) {
+ ret = FAIL;
+ goto out;
+ }
+
+ /* Added by PH: extra fields when TLS is in use or if the TCP/IP
+ connection is local. */
+
+ if (tls_cipher != NULL)
+ auth_extra_data = string_sprintf("secured\t%s%s",
+ tls_certificate_verified? "valid-client-cert" : "",
+ tls_certificate_verified? "\t" : "");
+ else if (Ustrcmp(sender_host_address, interface_address) == 0)
+ auth_extra_data = US"secured\t";
+
/****************************************************************************
The code below was the original code here. It didn't work. A reading of the
file auth-protocol.txt.gz that came with Dovecot 1.0_beta8 indicated that
- this was not right. Maybe something changed. I changed it to the above, and
- it seems to be better. PH
+ this was not right. Maybe something changed. I changed it to move the
+ service indication into the AUTH command, and it seems to be better. PH
fprintf(f, "VERSION\t%d\t%d\r\nSERVICE\tSMTP\r\nCPID\t%d\r\n"
"AUTH\t%d\t%s\trip=%s\tlip=%s\tresp=%s\r\n",
VERSION_MAJOR, VERSION_MINOR, getpid(), cuid,
ablock->public_name, sender_host_address, interface_address,
data ? (char *) data : "");
+
+ Subsequently, the command was modified to add "secured" and "valid-client-
+ cert" when relevant.
****************************************************************************/
- HDEBUG(D_auth) debug_printf("sent: VERSION\t%d\t%d\nsent: CPID\t%d\n"
- "sent: AUTH\t%d\t%s\tservice=smtp\trip=%s\tlip=%s\tresp=%s\n",
+ auth_command = string_sprintf("VERSION\t%d\t%d\nCPID\t%d\n"
+ "AUTH\t%d\t%s\tservice=smtp\t%srip=%s\tlip=%s\tresp=%s\n",
VERSION_MAJOR, VERSION_MINOR, getpid(), cuid,
- ablock->public_name, sender_host_address, interface_address,
- data ? (char *) data : "");
+ ablock->public_name, auth_extra_data, sender_host_address,
+ interface_address, data ? (char *) data : "");
+ fprintf(f, "%s", auth_command);
+ HDEBUG(D_auth) debug_printf("sent: %s", auth_command);
while (1) {
if (fgets(buffer, sizeof(buffer), f) == NULL) {
goto out;
}
+ /* Added by PH: data must not contain tab (as it is
+ b64 it shouldn't, but check for safety). */
+
+ if (Ustrchr(data, '\t') != NULL) {
+ ret = FAIL;
+ goto out;
+ }
+
if (fprintf(f, "CONT\t%d\t%s\r\n", cuid, data) < 0)
OUT("authentication socket write error");
-/* $Cambridge: exim/src/src/auths/get_no64_data.c,v 1.3 2006/02/07 11:19:01 ph10 Exp $ */
+/* $Cambridge: exim/src/src/auths/get_no64_data.c,v 1.4 2006/10/16 13:43:22 ph10 Exp $ */
/*************************************************
* Exim - an Internet mail transport agent *
/* This function is used by authentication drivers to output a challenge
to the SMTP client and read the response line. This version does not use base
-64 encoding for the text on the 334 line. It is used by the SPA authenticator.
+64 encoding for the text on the 334 line. It is used by the SPA and dovecot
+authenticators.
Arguments:
aptr set to point to the response (which is in big_buffer)
acl_smtp_rcpt = check_recipient
+tls_advertise_hosts = *
+tls_certificate = ${if eq {SERVER}{server}{DIR/aux-fixed/cert1}fail}
+tls_privatekey = ${if eq {SERVER}{server}{DIR/aux-fixed/cert1}fail}
+
+tls_verify_hosts = HOSTIPV4
+tls_verify_certificates = ${if eq {SERVER}{server}{DIR/aux-fixed/cert2}fail}
+
# ----- ACL -----
******** SERVER ********
1999-03-02 09:44:33 exim x.yz daemon started: pid=pppp, no queue runs, listening for SMTP on port 1225
1999-03-02 09:44:33 dovecot authenticator failed for (xxxx) [127.0.0.1]: 535 Incorrect authentication data (set_id=userx)
+1999-03-02 09:44:33 dovecot authenticator failed for (xxxx) [127.0.0.1]: 535 Incorrect authentication data (set_id=userx)
+1999-03-02 09:44:33 dovecot authenticator failed for (xxxx) [ip4.ip4.ip4.ip4]: 535 Incorrect authentication data (set_id=userx)
******** SERVER ********
1999-03-02 09:44:33 dovecot authenticator failed for (xxxx) [127.0.0.1]: 535 Incorrect authentication data (set_id=userx)
+1999-03-02 09:44:33 dovecot authenticator failed for (xxxx) [127.0.0.1]: 535 Incorrect authentication data (set_id=userx)
+1999-03-02 09:44:33 dovecot authenticator failed for (xxxx) [ip4.ip4.ip4.ip4]: 535 Incorrect authentication data (set_id=userx)
# Dovecot authentication (server only)
exim -DSERVER=server -bd -oX PORT_D
****
+# Try without TLS
client -t3 127.0.0.1 PORT_D
??? 220
EHLO xxxx
??? 250-
??? 250-
??? 250-
+??? 250-
+??? 250
+AUTH PLAIN AHVzZXJ4AHNlY3JldA==
+??? 535
+quit
+??? 221
+****
+# TLS, but no client certificate
+client-gnutls -t3 127.0.0.1 PORT_D
+??? 220
+EHLO xxxx
+??? 250-
+??? 250-
+??? 250-
+??? 250-
+??? 250-
+??? 250
+STARTTLS
+??? 220
+EHLO xxxx
+??? 250-
+??? 250-
+??? 250-
+??? 250-
+??? 250
+AUTH PLAIN AHVzZXJ4AHNlY3JldA==
+??? 535
+quit
+??? 221
+****
+# TLS with client certificate
+client-gnutls -t3 HOSTIPV4 PORT_D DIR/aux-fixed/cert2 DIR/aux-fixed/cert2
+??? 220
+EHLO xxxx
+??? 250-
+??? 250-
+??? 250-
+??? 250-
+??? 250-
+??? 250
+STARTTLS
+??? 220
+EHLO xxxx
+??? 250-
+??? 250-
+??? 250-
+??? 250-
??? 250
AUTH PLAIN AHVzZXJ4AHNlY3JldA==
??? 535
<<< 250-PIPELINING
??? 250-
<<< 250-AUTH PLAIN
+??? 250-
+<<< 250-STARTTLS
+??? 250
+<<< 250 HELP
+>>> AUTH PLAIN AHVzZXJ4AHNlY3JldA==
+??? 535
+<<< 535 Incorrect authentication data
+>>> quit
+??? 221
+<<< 221 myhost.test.ex closing connection
+End of script
+Connecting to 127.0.0.1 port 1225 ... connected
+??? 220
+<<< 220 myhost.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
+>>> EHLO xxxx
+??? 250-
+<<< 250-myhost.test.ex Hello xxxx [127.0.0.1]
+??? 250-
+<<< 250-SIZE 52428800
+??? 250-
+<<< 250-PIPELINING
+??? 250-
+<<< 250-AUTH PLAIN
+??? 250-
+<<< 250-STARTTLS
+??? 250
+<<< 250 HELP
+>>> STARTTLS
+??? 220
+<<< 220 TLS go ahead
+Attempting to start TLS
+Succeeded in starting TLS
+>>> EHLO xxxx
+??? 250-
+<<< 250-myhost.test.ex Hello xxxx [127.0.0.1]
+??? 250-
+<<< 250-SIZE 52428800
+??? 250-
+<<< 250-PIPELINING
+??? 250-
+<<< 250-AUTH PLAIN
+??? 250
+<<< 250 HELP
+>>> AUTH PLAIN AHVzZXJ4AHNlY3JldA==
+??? 535
+<<< 535 Incorrect authentication data
+>>> quit
+??? 221
+<<< 221 myhost.test.ex closing connection
+End of script
+Connecting to ip4.ip4.ip4.ip4 port 1225 ... connected
+Certificate file = TESTSUITE/aux-fixed/cert2
+Key file = TESTSUITE/aux-fixed/cert2
+??? 220
+<<< 220 myhost.test.ex ESMTP Exim x.yz Tue, 2 Mar 1999 09:44:33 +0000
+>>> EHLO xxxx
+??? 250-
+<<< 250-myhost.test.ex Hello xxxx [ip4.ip4.ip4.ip4]
+??? 250-
+<<< 250-SIZE 52428800
+??? 250-
+<<< 250-PIPELINING
+??? 250-
+<<< 250-AUTH PLAIN
+??? 250-
+<<< 250-STARTTLS
+??? 250
+<<< 250 HELP
+>>> STARTTLS
+??? 220
+<<< 220 TLS go ahead
+Attempting to start TLS
+Succeeded in starting TLS
+>>> EHLO xxxx
+??? 250-
+<<< 250-myhost.test.ex Hello xxxx [ip4.ip4.ip4.ip4]
+??? 250-
+<<< 250-SIZE 52428800
+??? 250-
+<<< 250-PIPELINING
+??? 250-
+<<< 250-AUTH PLAIN
??? 250
<<< 250 HELP
>>> AUTH PLAIN AHVzZXJ4AHNlY3JldA==
git://git.exim.org / exim.git / commitdiff