-/* $Cambridge: exim/src/src/auths/cyrus_sasl.c,v 1.6 2009/11/16 19:50:38 nm4 Exp $ */
-
/*************************************************
* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2009 */
+/* Copyright (c) University of Cambridge 1995 - 2017 */
/* See the file NOTICE for conditions of use and distribution. */
/* This code was originally contributed by Matthew Byng-Maddick */
loops. */
#ifndef AUTH_CYRUS_SASL
-static void dummy(int x) { dummy(x-1); }
+static void dummy(int x);
+static void dummy2(int x) { dummy(x-1); }
+static void dummy(int x) { dummy2(x-1); }
#else
};
+#ifdef MACRO_PREDEF
+
+/* Dummy values */
+void auth_cyrus_sasl_init(auth_instance *ablock) {}
+int auth_cyrus_sasl_server(auth_instance *ablock, uschar *data) {return 0;}
+int auth_cyrus_sasl_client(auth_instance *ablock, smtp_inblock *inblock,
+ smtp_outblock *outblock, int timeout, uschar *buffer, int buffsize) {return 0;}
+void auth_cyrus_sasl_version_report(FILE *f) {}
+
+#else /*!MACRO_PREDEF*/
+
+
+
+
/*************************************************
* Initialization entry point *
*************************************************/
{
auth_cyrus_sasl_options_block *ob =
(auth_cyrus_sasl_options_block *)(ablock->options_block);
-uschar *list, *listptr, *buffer;
+const uschar *list, *listptr, *buffer;
int rc, i;
unsigned int len;
-uschar *rs_point;
+uschar *rs_point, *expanded_hostname;
+char *realm_expanded;
sasl_conn_t *conn;
sasl_callback_t cbs[]={
if(ob->server_mech == NULL)
ob->server_mech=string_copy(ablock->public_name);
+expanded_hostname = expand_string(ob->server_hostname);
+if (expanded_hostname == NULL)
+ log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: "
+ "couldn't expand server_hostname [%s]: %s",
+ ablock->name, ob->server_hostname, expand_string_message);
+
+realm_expanded=NULL;
+if (ob->server_realm != NULL) {
+ realm_expanded = CS expand_string(ob->server_realm);
+ if (realm_expanded == NULL)
+ log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: "
+ "couldn't expand server_realm [%s]: %s",
+ ablock->name, ob->server_realm, expand_string_message);
+}
+
/* we're going to initialise the library to check that there is an
* authenticator of type whatever mechanism we're using
*/
-cbs[0].proc = &mysasl_config;
+cbs[0].proc = (int(*)(void)) &mysasl_config;
cbs[0].context = ob->server_mech;
rc=sasl_server_init(cbs, "exim");
log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: "
"couldn't initialise Cyrus SASL library.", ablock->name);
-rc=sasl_server_new(CS ob->server_service, CS primary_hostname,
- CS ob->server_realm, NULL, NULL, NULL, 0, &conn);
+rc=sasl_server_new(CS ob->server_service, CS expanded_hostname,
+ realm_expanded, NULL, NULL, NULL, 0, &conn);
if( rc != SASL_OK )
log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: "
"couldn't initialise Cyrus SASL server connection.", ablock->name);
-rc=sasl_listmech(conn, NULL, "", ":", "", (const char **)(&list), &len, &i);
+rc=sasl_listmech(conn, NULL, "", ":", "", (const char **)&list, &len, &i);
if( rc != SASL_OK )
log_write(0, LOG_PANIC_DIE|LOG_CONFIG_FOR, "%s authenticator: "
"couldn't get Cyrus SASL mechanism list.", ablock->name);
i=':';
listptr=list;
-HDEBUG(D_auth) debug_printf("Cyrus SASL knows about: %s\n", list);
+HDEBUG(D_auth) {
+ debug_printf("Initialised Cyrus SASL service=\"%s\" fqdn=\"%s\" realm=\"%s\"\n",
+ ob->server_service, expanded_hostname, realm_expanded);
+ debug_printf("Cyrus SASL knows mechanisms: %s\n", list);
+}
/* the store_get / store_reset mechanism is hierarchical
* the hierarchy is stored for us behind our back. This point
uschar *debug = NULL; /* Stops compiler complaining */
sasl_callback_t cbs[]={{SASL_CB_LIST_END, NULL, NULL}};
sasl_conn_t *conn;
-int rc, firsttime=1, clen;
+char *realm_expanded;
+int rc, i, firsttime=1, clen, *negotiated_ssf_ptr=NULL, negotiated_ssf;
unsigned int inlen, outlen;
input=data;
HDEBUG(D_auth) debug=string_copy(data);
hname=expand_string(ob->server_hostname);
-if(hname == NULL)
+realm_expanded=NULL;
+if (hname && ob->server_realm)
+ realm_expanded= CS expand_string(ob->server_realm);
+if((hname == NULL) ||
+ ((realm_expanded == NULL) && (ob->server_realm != NULL)))
{
auth_defer_msg = expand_string_message;
return DEFER;
if(inlen)
{
- clen=auth_b64decode(input, &clear);
+ clen = b64decode(input, &clear);
if(clen < 0)
{
return BAD64;
return DEFER;
}
-rc=sasl_server_new(CS ob->server_service, CS hname, CS ob->server_realm, NULL,
+rc=sasl_server_new(CS ob->server_service, CS hname, realm_expanded, NULL,
NULL, NULL, 0, &conn);
+HDEBUG(D_auth)
+ debug_printf("Initialised Cyrus SASL server connection; service=\"%s\" fqdn=\"%s\" realm=\"%s\"\n",
+ ob->server_service, hname, realm_expanded);
+
if( rc != SASL_OK )
{
auth_defer_msg = US"couldn't initialise Cyrus SASL connection";
return DEFER;
}
+if (tls_in.cipher)
+ {
+ rc = sasl_setprop(conn, SASL_SSF_EXTERNAL, (sasl_ssf_t *) &tls_in.bits);
+ if (rc != SASL_OK)
+ {
+ HDEBUG(D_auth) debug_printf("Cyrus SASL EXTERNAL SSF set %d failed: %s\n",
+ tls_in.bits, sasl_errstring(rc, NULL, NULL));
+ auth_defer_msg = US"couldn't set Cyrus SASL EXTERNAL SSF";
+ sasl_done();
+ return DEFER;
+ }
+ else
+ HDEBUG(D_auth) debug_printf("Cyrus SASL set EXTERNAL SSF to %d\n", tls_in.bits);
+ }
+else
+ HDEBUG(D_auth) debug_printf("Cyrus SASL: no TLS, no EXTERNAL SSF set\n");
+
+/* So sasl_setprop() documents non-shorted IPv6 addresses which is incredibly
+annoying; looking at cyrus-imapd-2.3.x source, the IP address is constructed
+with their iptostring() function, which just wraps
+getnameinfo(..., NI_NUMERICHOST|NI_NUMERICSERV), which is equivalent to the
+inet_ntop which we wrap in our host_ntoa() function.
+
+So the docs are too strict and we shouldn't worry about :: contractions. */
+
+/* Set properties for remote and local host-ip;port */
+for (i=0; i < 2; ++i)
+ {
+ struct sockaddr_storage ss;
+ int (*query)(int, struct sockaddr *, socklen_t *);
+ int propnum, port;
+ const uschar *label;
+ uschar *address, *address_port;
+ const char *s_err;
+ socklen_t sslen;
+
+ if (i)
+ {
+ query = &getpeername;
+ propnum = SASL_IPREMOTEPORT;
+ label = CUS"peer";
+ }
+ else
+ {
+ query = &getsockname;
+ propnum = SASL_IPLOCALPORT;
+ label = CUS"local";
+ }
+
+ sslen = sizeof(ss);
+ rc = query(fileno(smtp_in), (struct sockaddr *) &ss, &sslen);
+ if (rc < 0)
+ {
+ HDEBUG(D_auth)
+ debug_printf("Failed to get %s address information: %s\n",
+ label, strerror(errno));
+ break;
+ }
+
+ address = host_ntoa(-1, &ss, NULL, &port);
+ address_port = string_sprintf("%s;%d", address, port);
+
+ rc = sasl_setprop(conn, propnum, address_port);
+ if (rc != SASL_OK)
+ {
+ s_err = sasl_errdetail(conn);
+ HDEBUG(D_auth)
+ debug_printf("Failed to set %s SASL property: [%d] %s\n",
+ label, rc, s_err ? s_err : "<unknown reason>");
+ break;
+ }
+ HDEBUG(D_auth) debug_printf("Cyrus SASL set %s hostport to: %s\n",
+ label, address_port);
+ }
+
rc=SASL_CONTINUE;
while(rc==SASL_CONTINUE)
HDEBUG(D_auth) debug=string_copy(input);
if(inlen)
{
- clen=auth_b64decode(input, &clear);
+ clen = b64decode(input, &clear);
if(clen < 0)
{
sasl_dispose(&conn);
/* Get the username and copy it into $auth1 and $1. The former is now the
preferred variable; the latter is the original variable. */
rc = sasl_getprop(conn, SASL_USERNAME, (const void **)(&out2));
+ if (rc != SASL_OK)
+ {
+ HDEBUG(D_auth)
+ debug_printf("Cyrus SASL library will not tell us the username: %s\n",
+ sasl_errstring(rc, NULL, NULL));
+ log_write(0, LOG_REJECT, "%s authenticator (%s):\n "
+ "Cyrus SASL username fetch problem: %s", ablock->name, ob->server_mech,
+ sasl_errstring(rc, NULL, NULL));
+ sasl_dispose(&conn);
+ sasl_done();
+ return FAIL;
+ }
+
auth_vars[0] = expand_nstring[1] = string_copy(out2);
expand_nlength[1] = Ustrlen(expand_nstring[1]);
expand_nmax = 1;
HDEBUG(D_auth)
- debug_printf("Cyrus SASL %s authentication succeeded for %s\n", ob->server_mech, out2);
+ debug_printf("Cyrus SASL %s authentication succeeded for %s\n",
+ ob->server_mech, auth_vars[0]);
+
+ rc = sasl_getprop(conn, SASL_SSF, (const void **)(&negotiated_ssf_ptr));
+ if (rc != SASL_OK)
+ {
+ HDEBUG(D_auth)
+ debug_printf("Cyrus SASL library will not tell us the SSF: %s\n",
+ sasl_errstring(rc, NULL, NULL));
+ log_write(0, LOG_REJECT, "%s authenticator (%s):\n "
+ "Cyrus SASL SSF value not available: %s", ablock->name, ob->server_mech,
+ sasl_errstring(rc, NULL, NULL));
+ sasl_dispose(&conn);
+ sasl_done();
+ return FAIL;
+ }
+ negotiated_ssf = *negotiated_ssf_ptr;
+ HDEBUG(D_auth)
+ debug_printf("Cyrus SASL %s negotiated SSF: %d\n", ob->server_mech, negotiated_ssf);
+ if (negotiated_ssf > 0)
+ {
+ HDEBUG(D_auth)
+ debug_printf("Exim does not implement SASL wrapping (needed for SSF %d).\n", negotiated_ssf);
+ log_write(0, LOG_REJECT, "%s authenticator (%s):\n "
+ "Cyrus SASL SSF %d not supported by Exim", ablock->name, ob->server_mech, negotiated_ssf);
+ sasl_dispose(&conn);
+ sasl_done();
+ return FAIL;
+ }
+
/* close down the connection, freeing up library's memory */
sasl_dispose(&conn);
sasl_done();
return FAIL;
}
+#endif /*!MACRO_PREDEF*/
#endif /* AUTH_CYRUS_SASL */
/* End of cyrus_sasl.c */
git://git.exim.org / users / jgh / exim.git / blobdiff