* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) University of Cambridge 1995 - 2009 */
+/* Copyright (c) University of Cambridge 1995 - 2012 */
/* See the file NOTICE for conditions of use and distribution. */
/* Functions for reading the configuration file, and for displaying
{ "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
{ "dns_retrans", opt_time, &dns_retrans },
{ "dns_retry", opt_int, &dns_retry },
+ { "dns_use_dnssec", opt_int, &dns_use_dnssec },
{ "dns_use_edns0", opt_int, &dns_use_edns0 },
/* This option is now a no-op, retained for compability */
{ "drop_cr", opt_bool, &drop_cr },
{ "gecos_pattern", opt_stringptr, &gecos_pattern },
#ifdef SUPPORT_TLS
{ "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
+ { "gnutls_enable_pkcs11", opt_bool, &gnutls_enable_pkcs11 },
+ /* These three gnutls_require_* options stopped working in Exim 4.80 */
{ "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
{ "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
{ "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
{ "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
{ "tls_certificate", opt_stringptr, &tls_certificate },
{ "tls_crl", opt_stringptr, &tls_crl },
+ { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
{ "tls_dhparam", opt_stringptr, &tls_dhparam },
- { "tls_on_connect_ports", opt_stringptr, &tls_on_connect_ports },
+# if defined(EXPERIMENTAL_OCSP) && !defined(USE_GNUTLS)
+ { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
+# endif
+ { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
{ "tls_privatekey", opt_stringptr, &tls_privatekey },
{ "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
{ "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
gid_t gid;
BOOL boolvalue = TRUE;
BOOL freesptr = TRUE;
-BOOL extra_condition = FALSE;
optionlist *ol, *ol2;
struct passwd *pw;
void *reset_point;
log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
}
-if ((ol->type & opt_set) != 0)
- {
- uschar *mname = name;
- if (Ustrncmp(mname, "no_", 3) == 0) mname += 3;
- if (Ustrcmp(mname, "condition") == 0)
- extra_condition = TRUE;
- else
- log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
- "\"%s\" option set for the second time", mname);
- }
+if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
+ log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
+ "\"%s\" option set for the second time", name);
ol->type |= opt_set | issecure;
type = ol->type & opt_mask;
str_target = (uschar **)(ol->value);
else
str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
- if (extra_condition)
+ if (ol->type & opt_rep_con)
{
/* We already have a condition, we're conducting a crude hack to let
multiple condition rules be chained together, despite storing them in
strtemp = string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
saved_condition, sptr);
*str_target = string_copy_malloc(strtemp);
- /* TODO(pdp): there is a memory leak here when we set 3 or more
- conditions; I still don't understand the store mechanism enough
- to know what's the safe way to free content from an earlier store.
+ /* TODO(pdp): there is a memory leak here and just below
+ when we set 3 or more conditions; I still don't
+ understand the store mechanism enough to know
+ what's the safe way to free content from an earlier store.
AFAICT, stores stack, so freeing an early stored item also stores
all data alloc'd after it. If we knew conditions were adjacent,
we could survive that, but we don't. So I *think* we need to take
Because we only do this once, near process start-up, I'm prepared to
let this slide for the time being, even though it rankles. */
}
+ else if (*str_target && (ol->type & opt_rep_str))
+ {
+ uschar sep = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
+ saved_condition = *str_target;
+ strtemp = saved_condition + strlen(saved_condition)-1;
+ if (*strtemp == sep) *strtemp = 0; /* eliminate trailing list-sep */
+ strtemp = string_sprintf("%s%c%s", saved_condition, sep, sptr);
+ *str_target = string_copy_malloc(strtemp);
+ }
else
{
*str_target = sptr;
resides.
oltop points to the option list in which ol exists
last one more than the offset of the last entry in optop
+ no_labels do not show "foo = " at the start.
Returns: nothing
*/
static void
print_ol(optionlist *ol, uschar *name, void *options_block,
- optionlist *oltop, int last)
+ optionlist *oltop, int last, BOOL no_labels)
{
struct passwd *pw;
struct group *gr;
if (!admin_user && (ol->type & opt_secure) != 0)
{
- printf("%s = <value not displayable>\n", name);
+ const char * const hidden = "<value not displayable>";
+ if (no_labels)
+ printf("%s\n", hidden);
+ else
+ printf("%s = %s\n", name, hidden);
return;
}
case opt_stringptr:
case opt_rewrite: /* Show the text value */
s = *((uschar **)value);
- printf("%s = %s\n", name, (s == NULL)? US"" : string_printing2(s, FALSE));
+ if (!no_labels) printf("%s = ", name);
+ printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
break;
case opt_int:
- printf("%s = %d\n", name, *((int *)value));
+ if (!no_labels) printf("%s = ", name);
+ printf("%d\n", *((int *)value));
break;
case opt_mkint:
c = 'M';
x >>= 10;
}
- printf("%s = %d%c\n", name, x, c);
+ if (!no_labels) printf("%s = ", name);
+ printf("%d%c\n", x, c);
+ }
+ else
+ {
+ if (!no_labels) printf("%s = ", name);
+ printf("%d\n", x);
}
- else printf("%s = %d\n", name, x);
}
break;
case opt_Kint:
{
int x = *((int *)value);
- if (x == 0) printf("%s = 0\n", name);
- else if ((x & 1023) == 0) printf("%s = %dM\n", name, x >> 10);
- else printf("%s = %dK\n", name, x);
+ if (!no_labels) printf("%s = ", name);
+ if (x == 0) printf("0\n");
+ else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
+ else printf("%dK\n", x);
}
break;
case opt_octint:
- printf("%s = %#o\n", name, *((int *)value));
+ if (!no_labels) printf("%s = ", name);
+ printf("%#o\n", *((int *)value));
break;
/* Can be negative only when "unset", in which case integer */
int d = 100;
if (x < 0) printf("%s =\n", name); else
{
- printf("%s = %d.", name, x/1000);
+ if (!no_labels) printf("%s = ", name);
+ printf("%d.", x/1000);
do
{
printf("%d", f/d);
if (options_block != NULL)
value2 = (void *)((uschar *)options_block + (long int)value2);
s = *((uschar **)value2);
- printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
+ if (!no_labels) printf("%s = ", name);
+ printf("%s\n", (s == NULL)? US"" : string_printing(s));
break;
}
}
/* Else fall through */
case opt_uid:
+ if (!no_labels) printf("%s = ", name);
if (! *get_set_flag(name, oltop, last, options_block))
- printf("%s =\n", name);
+ printf("\n");
else
{
pw = getpwuid(*((uid_t *)value));
if (pw == NULL)
- printf("%s = %ld\n", name, (long int)(*((uid_t *)value)));
- else printf("%s = %s\n", name, pw->pw_name);
+ printf("%ld\n", (long int)(*((uid_t *)value)));
+ else printf("%s\n", pw->pw_name);
}
break;
if (options_block != NULL)
value2 = (void *)((uschar *)options_block + (long int)value2);
s = *((uschar **)value2);
- printf("%s = %s\n", name, (s == NULL)? US"" : string_printing(s));
+ if (!no_labels) printf("%s = ", name);
+ printf("%s\n", (s == NULL)? US"" : string_printing(s));
break;
}
}
/* Else fall through */
case opt_gid:
+ if (!no_labels) printf("%s = ", name);
if (! *get_set_flag(name, oltop, last, options_block))
- printf("%s =\n", name);
+ printf("\n");
else
{
gr = getgrgid(*((int *)value));
if (gr == NULL)
- printf("%s = %ld\n", name, (long int)(*((int *)value)));
- else printf("%s = %s\n", name, gr->gr_name);
+ printf("%ld\n", (long int)(*((int *)value)));
+ else printf("%s\n", gr->gr_name);
}
break;
case opt_uidlist:
uidlist = *((uid_t **)value);
- printf("%s =", name);
+ if (!no_labels) printf("%s =", name);
if (uidlist != NULL)
{
int i;
uschar sep = ' ';
+ if (no_labels) sep = '\0';
for (i = 1; i <= (int)(uidlist[0]); i++)
{
uschar *name = NULL;
pw = getpwuid(uidlist[i]);
if (pw != NULL) name = US pw->pw_name;
- if (name != NULL) printf("%c%s", sep, name);
- else printf("%c%ld", sep, (long int)(uidlist[i]));
+ if (sep != '\0') printf("%c", sep);
+ if (name != NULL) printf("%s", name);
+ else printf("%ld", (long int)(uidlist[i]));
sep = ':';
}
}
case opt_gidlist:
gidlist = *((gid_t **)value);
- printf("%s =", name);
+ if (!no_labels) printf("%s =", name);
if (gidlist != NULL)
{
int i;
uschar sep = ' ';
+ if (no_labels) sep = '\0';
for (i = 1; i <= (int)(gidlist[0]); i++)
{
uschar *name = NULL;
gr = getgrgid(gidlist[i]);
if (gr != NULL) name = US gr->gr_name;
- if (name != NULL) printf("%c%s", sep, name);
- else printf("%c%ld", sep, (long int)(gidlist[i]));
+ if (sep != '\0') printf("%c", sep);
+ if (name != NULL) printf("%s", name);
+ else printf("%ld", (long int)(gidlist[i]));
sep = ':';
}
}
break;
case opt_time:
- printf("%s = %s\n", name, readconf_printtime(*((int *)value)));
+ if (!no_labels) printf("%s = ", name);
+ printf("%s\n", readconf_printtime(*((int *)value)));
break;
case opt_timelist:
{
int i;
int *list = (int *)value;
- printf("%s = ", name);
+ if (!no_labels) printf("%s = ", name);
for (i = 0; i < list[1]; i++)
printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
printf("\n");
s = *((uschar **)value2);
if (s != NULL)
{
- printf("%s = %s\n", name, string_printing(s));
+ if (!no_labels) printf("%s = ", name);
+ printf("%s\n", string_printing(s));
break;
}
/* s == NULL => string not set; fall through */
Arguments:
name option name if type == NULL; else driver name
type NULL or driver type name, as described above
+ no_labels avoid the "foo = " at the start of an item
Returns: nothing
*/
void
-readconf_print(uschar *name, uschar *type)
+readconf_print(uschar *name, uschar *type, BOOL no_labels)
{
BOOL names_only = FALSE;
optionlist *ol;
if (t != NULL)
{
found = TRUE;
- printf("%slist %s = %s\n", types[i], name+1,
- ((namedlist_block *)(t->data.ptr))->string);
+ if (no_labels)
+ printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
+ else
+ printf("%slist %s = %s\n", types[i], name+1,
+ ((namedlist_block *)(t->data.ptr))->string);
}
}
ol < optionlist_config + optionlist_config_size; ol++)
{
if ((ol->type & opt_hidden) == 0)
- print_ol(ol, US ol->name, NULL, optionlist_config, optionlist_config_size);
+ print_ol(ol, US ol->name, NULL,
+ optionlist_config, optionlist_config_size,
+ no_labels);
}
return;
}
ol < local_scan_options + local_scan_options_count; ol++)
{
print_ol(ol, US ol->name, NULL, local_scan_options,
- local_scan_options_count);
+ local_scan_options_count, no_labels);
}
#endif
return;
else
{
print_ol(find_option(name, optionlist_config, optionlist_config_size),
- name, NULL, optionlist_config, optionlist_config_size);
+ name, NULL, optionlist_config, optionlist_config_size, no_labels);
return;
}
}
for (ol = ol2; ol < ol2 + size; ol++)
{
if ((ol->type & opt_hidden) == 0)
- print_ol(ol, US ol->name, d, ol2, size);
+ print_ol(ol, US ol->name, d, ol2, size, no_labels);
}
for (ol = d->info->options;
ol < d->info->options + *(d->info->options_count); ol++)
{
if ((ol->type & opt_hidden) == 0)
- print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count));
+ print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
}
if (name != NULL) return;
}
+/*************************************************
+* Drop privs for checking TLS config *
+*************************************************/
+
+/* We want to validate TLS options during readconf, but do not want to be
+root when we call into the TLS library, in case of library linkage errors
+which cause segfaults; before this check, those were always done as the Exim
+runtime user and it makes sense to continue with that.
+
+Assumes: tls_require_ciphers has been set, if it will be
+ exim_user has been set, if it will be
+ exim_group has been set, if it will be
+
+Returns: bool for "okay"; false will cause caller to immediately exit.
+*/
+
+#ifdef SUPPORT_TLS
+static BOOL
+tls_dropprivs_validate_require_cipher(void)
+{
+const uschar *errmsg;
+pid_t pid;
+int rc, status;
+void (*oldsignal)(int);
+
+oldsignal = signal(SIGCHLD, SIG_DFL);
+
+fflush(NULL);
+if ((pid = fork()) < 0)
+ log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
+
+if (pid == 0)
+ {
+ /* in some modes, will have dropped privilege already */
+ if (!geteuid())
+ exim_setugid(exim_uid, exim_gid, FALSE,
+ US"calling tls_validate_require_cipher");
+
+ errmsg = tls_validate_require_cipher();
+ if (errmsg)
+ {
+ log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
+ "tls_require_ciphers invalid: %s", errmsg);
+ }
+ fflush(NULL);
+ _exit(0);
+ }
+
+do {
+ rc = waitpid(pid, &status, 0);
+} while (rc < 0 && errno == EINTR);
+
+DEBUG(D_tls)
+ debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
+ (int)pid, status);
+
+signal(SIGCHLD, oldsignal);
+
+return status == 0;
+}
+#endif /* SUPPORT_TLS */
+
+
+
+
/*************************************************
* Read main configuration options *
*************************************************/
"tls_%sverify_hosts is set, but tls_verify_certificates is not set",
(tls_verify_hosts != NULL)? "" : "try_");
+/* This also checks that the library linkage is working and we can call
+routines in it, so call even if tls_require_ciphers is unset */
+if (!tls_dropprivs_validate_require_cipher())
+ exit(1);
+
+/* Magic number: at time of writing, 1024 has been the long-standing value
+used by so many clients, and what Exim used to use always, that it makes
+sense to just min-clamp this max-clamp at that. */
+if (tls_dh_max_bits < 1024)
+ log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
+ "tls_dh_max_bits is too small, must be at least 1024 for interop");
+
/* If openssl_options is set, validate it */
if (openssl_options != NULL)
{
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