*************************************************/
/* Copyright (c) University of Cambridge 1995 - 2018 */
+/* Copyright (c) The Exim Maintainers 2020 */
/* See the file NOTICE for conditions of use and distribution. */
/* Code for handling Access Control Lists (ACLs) */
#define CALLOUT_TIMEOUT_DEFAULT 30
+/* Default quota cache TTLs */
+
+#define QUOTA_POS_DEFAULT (5*60)
+#define QUOTA_NEG_DEFAULT (60*60)
+
+
/* ACL verb codes - keep in step with the table of verbs that follows */
enum { ACL_ACCEPT, ACL_DEFER, ACL_DENY, ACL_DISCARD, ACL_DROP, ACL_REQUIRE,
ACLC_DKIM_SIGNER,
ACLC_DKIM_STATUS,
#endif
-#ifdef EXPERIMENTAL_DMARC
+#ifdef SUPPORT_DMARC
ACLC_DMARC_STATUS,
#endif
ACLC_DNSLISTS,
/* ACL conditions/modifiers: "delay", "control", "continue", "endpass",
"message", "log_message", "log_reject_target", "logwrite", "queue" and "set" are
modifiers that look like conditions but always return TRUE. They are used for
-their side effects. */
+their side effects. Do not invent new modifier names that result in one name
+being the prefix of another; the binary-search in the list will go wrong. */
typedef struct condition_def {
uschar *name;
[ACLC_DKIM_SIGNER] = { US"dkim_signers", TRUE, FALSE, (unsigned int) ~ACL_BIT_DKIM },
[ACLC_DKIM_STATUS] = { US"dkim_status", TRUE, FALSE, (unsigned int) ~ACL_BIT_DKIM },
#endif
-#ifdef EXPERIMENTAL_DMARC
+#ifdef SUPPORT_DMARC
[ACLC_DMARC_STATUS] = { US"dmarc_status", TRUE, FALSE, (unsigned int) ~ACL_BIT_DATA },
#endif
#ifndef DISABLE_DKIM
CONTROL_DKIM_VERIFY,
#endif
-#ifdef EXPERIMENTAL_DMARC
+#ifdef SUPPORT_DMARC
CONTROL_DMARC_VERIFY,
CONTROL_DMARC_FORENSIC,
#endif
CONTROL_NO_MULTILINE,
CONTROL_NO_PIPELINING,
- CONTROL_QUEUE_ONLY,
-#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
- CONTROL_REQUIRETLS,
-#endif
+ CONTROL_QUEUE,
CONTROL_SUBMISSION,
CONTROL_SUPPRESS_LOCAL_FIXUPS,
#ifdef SUPPORT_I18N
},
#endif
-#ifdef EXPERIMENTAL_DMARC
+#ifdef SUPPORT_DMARC
[CONTROL_DMARC_VERIFY] =
{ US"dmarc_disable_verify", FALSE,
ACL_BIT_DATA | ACL_BIT_NOTSMTP | ACL_BIT_NOTSMTP_START
ACL_BIT_NOTSMTP | ACL_BIT_NOTSMTP_START
},
-[CONTROL_QUEUE_ONLY] =
- { US"queue_only", FALSE,
+[CONTROL_QUEUE] =
+ { US"queue", TRUE,
(unsigned)
~(ACL_BIT_MAIL | ACL_BIT_RCPT |
ACL_BIT_PREDATA | ACL_BIT_DATA |
ACL_BIT_NOTSMTP | ACL_BIT_MIME)
},
-
-#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
-[CONTROL_REQUIRETLS] =
- { US"requiretls", FALSE,
- (unsigned)
- ~(ACL_BIT_MAIL | ACL_BIT_RCPT | ACL_BIT_PREDATA |
- ACL_BIT_DATA | ACL_BIT_MIME |
- ACL_BIT_NOTSMTP)
- },
-#endif
-
[CONTROL_SUBMISSION] =
{ US"submission", TRUE,
(unsigned)
*error = NULL;
-while ((s = (*func)()) != NULL)
+while ((s = (*func)()))
{
int v, c;
BOOL negated = FALSE;
/* Conditions (but not verbs) are allowed to be negated by an initial
exclamation mark. */
- while (isspace(*s)) s++;
- if (*s == '!')
+ if (Uskip_whitespace(&s) == '!')
{
negated = TRUE;
s++;
*error = string_sprintf("malformed ACL line \"%s\"", saveline);
return NULL;
}
- this = store_get(sizeof(acl_block));
+ this = store_get(sizeof(acl_block), FALSE);
*lastp = this;
lastp = &(this->next);
this->next = NULL;
return NULL;
}
- cond = store_get(sizeof(acl_condition_block));
+ cond = store_get(sizeof(acl_condition_block), FALSE);
cond->next = NULL;
cond->type = c;
cond->u.negated = negated;
}
cond->u.varname = string_copyn(s, 18);
s = endptr;
- while (isspace(*s)) s++;
+ Uskip_whitespace(&s);
}
else
#endif
{
uschar *endptr;
- if (Ustrncmp(s, "acl_c", 5) != 0 &&
- Ustrncmp(s, "acl_m", 5) != 0)
+ if (Ustrncmp(s, "acl_c", 5) != 0 && Ustrncmp(s, "acl_m", 5) != 0)
{
*error = string_sprintf("invalid variable name after \"set\" in ACL "
- "modifier \"set %s\" (must start \"acl_c\" or \"acl_m\")", s);
+ "modifier \"set %s\" (must start \"acl_c\" or \"acl_m\")", s);
return NULL;
}
if (!isdigit(*endptr) && *endptr != '_')
{
*error = string_sprintf("invalid variable name after \"set\" in ACL "
- "modifier \"set %s\" (digit or underscore must follow acl_c or acl_m)",
- s);
+ "modifier \"set %s\" (digit or underscore must follow acl_c or acl_m)",
+ s);
return NULL;
}
- while (*endptr != 0 && *endptr != '=' && !isspace(*endptr))
+ while (*endptr && *endptr != '=' && !isspace(*endptr))
{
if (!isalnum(*endptr) && *endptr != '_')
- {
- *error = string_sprintf("invalid character \"%c\" in variable name "
- "in ACL modifier \"set %s\"", *endptr, s);
- return NULL;
- }
+ {
+ *error = string_sprintf("invalid character \"%c\" in variable name "
+ "in ACL modifier \"set %s\"", *endptr, s);
+ return NULL;
+ }
endptr++;
}
cond->u.varname = string_copyn(s + 4, endptr - s - 4);
s = endptr;
- while (isspace(*s)) s++;
+ Uskip_whitespace(&s);
}
/* For "set", we are now positioned for the data. For the others, only
conditions[c].is_modifier ? US"modifier" : US"condition");
return NULL;
}
- while (isspace(*s)) s++;
+ Uskip_whitespace(&s);
cond->arg = string_copy(s);
}
}
if (!*hptr)
{
- header_line *h = store_get(sizeof(header_line));
+ /* The header_line struct itself is not tainted, though it points to
+ possibly tainted data. */
+ header_line * h = store_get(sizeof(header_line), FALSE);
h->text = hdr;
h->next = NULL;
h->type = newtype;
{
int rc;
-user_msgptr = user_msgptr; /* stop compiler warning */
-
/* Previous success */
if (sender_host_name != NULL) return OK;
tree_node *t;
const uschar *found;
int priority, weight, port;
-dns_answer dnsa;
+dns_answer * dnsa = store_get_dns_answer();
dns_scan dnss;
dns_record *rr;
int rc, type;
if (string_is_ip_address(domain, NULL) != 0)
{
if (!dns_csa_use_reverse) return CSA_UNKNOWN;
- dns_build_reverse(domain, target);
- domain = target;
+ domain = dns_build_reverse(domain);
}
/* Find out if we've already done the CSA check for this domain. If we have,
t = tree_search(csa_cache, domain);
if (t != NULL) return t->data.val;
-t = store_get_perm(sizeof(tree_node) + Ustrlen(domain));
+t = store_get_perm(sizeof(tree_node) + Ustrlen(domain), is_tainted(domain));
Ustrcpy(t->name, domain);
(void)tree_insertnode(&csa_cache, t);
/* Now we are ready to do the actual DNS lookup(s). */
found = domain;
-switch (dns_special_lookup(&dnsa, domain, T_CSA, &found))
+switch (dns_special_lookup(dnsa, domain, T_CSA, &found))
{
/* If something bad happened (most commonly DNS_AGAIN), defer. */
/* Scan the reply for well-formed CSA SRV records. */
-for (rr = dns_next_rr(&dnsa, &dnss, RESET_ANSWERS);
+for (rr = dns_next_rr(dnsa, &dnss, RESET_ANSWERS);
rr;
- rr = dns_next_rr(&dnsa, &dnss, RESET_NEXT)) if (rr->type == T_SRV)
+ rr = dns_next_rr(dnsa, &dnss, RESET_NEXT)) if (rr->type == T_SRV)
{
const uschar * p = rr->data;
client's IP address is listed as one of the SRV target addresses. Save the
target hostname then break to scan the additional data for its addresses. */
- (void)dn_expand(dnsa.answer, dnsa.answer + dnsa.answerlen, p,
+ (void)dn_expand(dnsa->answer, dnsa->answer + dnsa->answerlen, p,
(DN_EXPAND_ARG4_TYPE)target, sizeof(target));
DEBUG(D_acl) debug_printf_indent("CSA target is %s\n", target);
because it does not fully support SRV records), we need to do another lookup
to obtain the target addresses; otherwise we have a definitive result. */
-rc = acl_verify_csa_address(&dnsa, &dnss, RESET_ADDITIONAL, target);
+rc = acl_verify_csa_address(dnsa, &dnss, RESET_ADDITIONAL, target);
if (rc != CSA_FAIL_NOADDR) return t->data.val = rc;
/* The DNS lookup type corresponds to the IP version used by the client. */
lookup_dnssec_authenticated = NULL;
-switch (dns_lookup(&dnsa, target, type, NULL))
+switch (dns_lookup(dnsa, target, type, NULL))
{
/* If something bad happened (most commonly DNS_AGAIN), defer. */
/* If the query succeeded, scan the addresses and return the result. */
case DNS_SUCCEED:
- rc = acl_verify_csa_address(&dnsa, &dnss, RESET_ANSWERS, target);
+ rc = acl_verify_csa_address(dnsa, &dnss, RESET_ANSWERS, target);
if (rc != CSA_FAIL_NOADDR) return t->data.val = rc;
/* else fall through */
unsigned alt_opt_sep; /* >0 Non-/ option separator (custom parser) */
} verify_type_t;
static verify_type_t verify_type_list[] = {
- /* name value where no-opt opt-sep */
- { US"reverse_host_lookup", VERIFY_REV_HOST_LKUP, ~0, FALSE, 0 },
- { US"certificate", VERIFY_CERT, ~0, TRUE, 0 },
- { US"helo", VERIFY_HELO, ~0, TRUE, 0 },
- { US"csa", VERIFY_CSA, ~0, FALSE, 0 },
- { US"header_syntax", VERIFY_HDR_SYNTAX, ACL_BIT_DATA | ACL_BIT_NOTSMTP, TRUE, 0 },
- { US"not_blind", VERIFY_NOT_BLIND, ACL_BIT_DATA | ACL_BIT_NOTSMTP, TRUE, 0 },
- { US"header_sender", VERIFY_HDR_SNDR, ACL_BIT_DATA | ACL_BIT_NOTSMTP, FALSE, 0 },
+ /* name value where no-opt opt-sep */
+ { US"reverse_host_lookup", VERIFY_REV_HOST_LKUP, (unsigned)~0, FALSE, 0 },
+ { US"certificate", VERIFY_CERT, (unsigned)~0, TRUE, 0 },
+ { US"helo", VERIFY_HELO, (unsigned)~0, TRUE, 0 },
+ { US"csa", VERIFY_CSA, (unsigned)~0, FALSE, 0 },
+ { US"header_syntax", VERIFY_HDR_SYNTAX, ACL_BITS_HAVEDATA, TRUE, 0 },
+ { US"not_blind", VERIFY_NOT_BLIND, ACL_BITS_HAVEDATA, FALSE, 0 },
+ { US"header_sender", VERIFY_HDR_SNDR, ACL_BITS_HAVEDATA, FALSE, 0 },
{ US"sender", VERIFY_SNDR, ACL_BIT_MAIL | ACL_BIT_RCPT
- |ACL_BIT_PREDATA | ACL_BIT_DATA | ACL_BIT_NOTSMTP,
+ | ACL_BIT_PREDATA | ACL_BIT_DATA | ACL_BIT_NOTSMTP,
FALSE, 6 },
{ US"recipient", VERIFY_RCPT, ACL_BIT_RCPT, FALSE, 0 },
- { US"header_names_ascii", VERIFY_HDR_NAMES_ASCII, ACL_BIT_DATA | ACL_BIT_NOTSMTP, TRUE, 0 },
+ { US"header_names_ascii", VERIFY_HDR_NAMES_ASCII, ACL_BITS_HAVEDATA, TRUE, 0 },
#ifdef EXPERIMENTAL_ARC
{ US"arc", VERIFY_ARC, ACL_BIT_DATA, FALSE , 0 },
#endif
+static int
+v_period(const uschar * s, const uschar * arg, uschar ** log_msgptr)
+{
+int period;
+if ((period = readconf_readtime(s, 0, FALSE)) < 0)
+ {
+ *log_msgptr = string_sprintf("bad time value in ACL condition "
+ "\"verify %s\"", arg);
+ }
+return period;
+}
+
+
+
/* This function implements the "verify" condition. It is called when
encountered in any ACL, because some tests are almost always permitted. Some
just don't make sense, and always fail (for example, an attempt to test a host
BOOL callout_defer_ok = FALSE;
BOOL no_details = FALSE;
BOOL success_on_redirect = FALSE;
+BOOL quota = FALSE;
+int quota_pos_cache = QUOTA_POS_DEFAULT, quota_neg_cache = QUOTA_NEG_DEFAULT;
address_item *sender_vaddr = NULL;
uschar *verify_sender_address = NULL;
uschar *pm_mailfrom = NULL;
uschar *slash = Ustrchr(arg, '/');
const uschar *list = arg;
-uschar *ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size);
+uschar *ss = string_nextinlist(&list, &sep, NULL, 0);
verify_type_t * vp;
if (!ss) goto BAD_VERIFY;
case VERIFY_NOT_BLIND:
/* Check that no recipient of this message is "blind", that is, every envelope
recipient must be mentioned in either To: or Cc:. */
+ {
+ BOOL case_sensitive = TRUE;
+
+ while ((ss = string_nextinlist(&list, &sep, NULL, 0)))
+ if (strcmpic(ss, US"case_insensitive") == 0)
+ case_sensitive = FALSE;
+ else
+ {
+ *log_msgptr = string_sprintf("unknown option \"%s\" in ACL "
+ "condition \"verify %s\"", ss, arg);
+ return ERROR;
+ }
- if ((rc = verify_check_notblind()) != OK)
+ if ((rc = verify_check_notblind(case_sensitive)) != OK)
{
- *log_msgptr = string_sprintf("bcc recipient detected");
+ *log_msgptr = US"bcc recipient detected";
if (smtp_return_error_details)
*user_msgptr = string_sprintf("Rejected after DATA: %s", *log_msgptr);
}
return rc;
+ }
/* The remaining verification tests check recipient and sender addresses,
either from the envelope or from the header. There are a number of
in place of the actual sender (rare special-case requirement). */
{
uschar *s = ss + 6;
- if (*s == 0)
+ if (!*s)
verify_sender_address = sender_address;
else
{
/* Remaining items are optional; they apply to sender and recipient
verification, including "header sender" verification. */
-while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
+while ((ss = string_nextinlist(&list, &sep, NULL, 0)))
{
if (strcmpic(ss, US"defer_ok") == 0) defer_ok = TRUE;
else if (strcmpic(ss, US"no_details") == 0) no_details = TRUE;
else if (strncmpic(ss, US"callout", 7) == 0)
{
callout = CALLOUT_TIMEOUT_DEFAULT;
- ss += 7;
- if (*ss != 0)
+ if (*(ss += 7))
{
while (isspace(*ss)) ss++;
if (*ss++ == '=')
{
const uschar * sublist = ss;
int optsep = ',';
- uschar buffer[256];
- uschar * opt;
while (isspace(*sublist)) sublist++;
- while ((opt = string_nextinlist(&sublist, &optsep, buffer, sizeof(buffer))))
+ for (uschar * opt; opt = string_nextinlist(&sublist, &optsep, NULL, 0); )
{
callout_opt_t * op;
double period = 1.0F;
}
while (isspace(*opt)) opt++;
}
- if (op->timeval && (period = readconf_readtime(opt, 0, FALSE)) < 0)
- {
- *log_msgptr = string_sprintf("bad time value in ACL condition "
- "\"verify %s\"", arg);
+ if (op->timeval && (period = v_period(opt, arg, log_msgptr)) < 0)
return ERROR;
- }
switch(op->value)
{
}
}
+ /* The quota option has sub-options, comma-separated */
+
+ else if (strncmpic(ss, US"quota", 5) == 0)
+ {
+ quota = TRUE;
+ if (*(ss += 5))
+ {
+ while (isspace(*ss)) ss++;
+ if (*ss++ == '=')
+ {
+ const uschar * sublist = ss;
+ int optsep = ',';
+ int period;
+
+ while (isspace(*sublist)) sublist++;
+ for (uschar * opt; opt = string_nextinlist(&sublist, &optsep, NULL, 0); )
+ if (Ustrncmp(opt, "cachepos=", 9) == 0)
+ if ((period = v_period(opt += 9, arg, log_msgptr)) < 0)
+ return ERROR;
+ else
+ quota_pos_cache = period;
+ else if (Ustrncmp(opt, "cacheneg=", 9) == 0)
+ if ((period = v_period(opt += 9, arg, log_msgptr)) < 0)
+ return ERROR;
+ else
+ quota_neg_cache = period;
+ else if (Ustrcmp(opt, "no_cache") == 0)
+ quota_pos_cache = quota_neg_cache = 0;
+ }
+ }
+ }
+
/* Option not recognized */
else
return ERROR;
}
+/* Handle quota verification */
+if (quota)
+ {
+ if (vp->value != VERIFY_RCPT)
+ {
+ *log_msgptr = US"can only verify quota of recipient";
+ return ERROR;
+ }
+
+ if ((rc = verify_quota_call(addr->address,
+ quota_pos_cache, quota_neg_cache, log_msgptr)) != OK)
+ {
+ *basic_errno = errno;
+ if (smtp_return_error_details)
+ {
+ if (!*user_msgptr && *log_msgptr)
+ *user_msgptr = string_sprintf("Rejected after %s: %s",
+ smtp_names[smtp_connection_had[smtp_ch_index-1]], *log_msgptr);
+ if (rc == DEFER) f.acl_temp_details = TRUE;
+ }
+ }
+
+ return rc;
+ }
+
/* Handle sender-in-header verification. Default the user message to the log
message if giving out verification details. */
}
sender_vaddr = verify_checked_sender(verify_sender_address);
- if (sender_vaddr != NULL && /* Previously checked */
- callout <= 0) /* No callout needed this time */
+ if ( sender_vaddr /* Previously checked */
+ && callout <= 0) /* No callout needed this time */
{
/* If the "routed" flag is set, it means that routing worked before, so
this check can give OK (the saved return code value, if set, belongs to a
*basic_errno = sender_vaddr->basic_errno;
else
DEBUG(D_acl)
- {
if (Ustrcmp(sender_vaddr->address, verify_sender_address) != 0)
debug_printf_indent("sender %s verified ok as %s\n",
verify_sender_address, sender_vaddr->address);
else
debug_printf_indent("sender %s verified ok\n",
verify_sender_address);
- }
}
else
rc = OK; /* Null sender */
*basic_errno = addr2.basic_errno;
*log_msgptr = addr2.message;
- *user_msgptr = (addr2.user_message != NULL)?
- addr2.user_message : addr2.message;
+ *user_msgptr = addr2.user_message ? addr2.user_message : addr2.message;
/* Allow details for temporary error if the address is so flagged. */
if (testflag((&addr2), af_pass_message)) f.acl_temp_details = TRUE;
/* We have a result from the relevant test. Handle defer overrides first. */
-if (rc == DEFER && (defer_ok ||
- (callout_defer_ok && *basic_errno == ERRNO_CALLOUTDEFER)))
+if ( rc == DEFER
+ && ( defer_ok
+ || callout_defer_ok && *basic_errno == ERRNO_CALLOUTDEFER
+ ) )
{
HDEBUG(D_acl) debug_printf_indent("verify defer overridden by %s\n",
defer_ok? "defer_ok" : "callout_defer_ok");
/* If we've failed a sender, set up a recipient message, and point
sender_verified_failed to the address item that actually failed. */
-if (rc != OK && verify_sender_address != NULL)
+if (rc != OK && verify_sender_address)
{
if (rc != DEFER)
*log_msgptr = *user_msgptr = US"Sender verify failed";
/* Verifying an address messes up the values of $domain and $local_part,
so reset them before returning if this is a RCPT ACL. */
-if (addr != NULL)
+if (addr)
{
deliver_domain = addr->domain;
deliver_localpart = addr->local_part;
* Check argument for control= modifier *
*************************************************/
-/* Called from acl_check_condition() below
+/* Called from acl_check_condition() below.
+To handle the case "queue_only" we accept an _ in the
+initial / option-switch position.
Arguments:
arg the argument string for control=
{
int idx, len;
control_def * d;
+uschar c;
if ( (idx = find_control(arg, controls_list, nelem(controls_list))) < 0
- || ( arg[len = Ustrlen((d = controls_list+idx)->name)] != 0
- && (!d->has_option || arg[len] != '/')
+ || ( (c = arg[len = Ustrlen((d = controls_list+idx)->name)]) != 0
+ && (!d->has_option || c != '/' && c != '_')
) )
{
*log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg);
string_cat(NULL, US"error in arguments to \"ratelimit\" condition: ");
va_start(ap, format);
-g = string_vformat(g, TRUE, format, ap);
+g = string_vformat(g, SVFMT_EXTEND|SVFMT_REBUFFER, format, ap);
va_end(ap);
-gstring_reset_unused(g);
+gstring_release_unused(g);
*log_msgptr = string_from_gstring(g);
return ERROR;
}
/* Parse the other options. */
-while ((ss = string_nextinlist(&arg, &sep, big_buffer, big_buffer_size)))
+while ((ss = string_nextinlist(&arg, &sep, NULL, 0)))
{
if (strcmpic(ss, US"leaky") == 0) leaky = TRUE;
else if (strcmpic(ss, US"strict") == 0) strict = TRUE;
/* We aren't using a pre-computed rate, so get a previously recorded rate
from the database, which will be updated and written back if required. */
-if (!(dbm = dbfn_open(US"ratelimit", O_RDWR, &dbblock, TRUE)))
+if (!(dbm = dbfn_open(US"ratelimit", O_RDWR, &dbblock, TRUE, TRUE)))
{
store_pool = old_pool;
sender_rate = NULL;
/* No Bloom filter. This basic ratelimit block is initialized below. */
HDEBUG(D_acl) debug_printf_indent("ratelimit creating new rate data block\n");
dbdb_size = sizeof(*dbd);
- dbdb = store_get(dbdb_size);
+ dbdb = store_get(dbdb_size, FALSE); /* not tainted */
}
else
{
extra = (int)limit * 2 - sizeof(dbdb->bloom);
if (extra < 0) extra = 0;
dbdb_size = sizeof(*dbdb) + extra;
- dbdb = store_get(dbdb_size);
+ dbdb = store_get(dbdb_size, FALSE); /* not tainted */
dbdb->bloom_epoch = tv.tv_sec;
dbdb->bloom_size = sizeof(dbdb->bloom) + extra;
memset(dbdb->bloom, 0, dbdb->bloom_size);
dbfn_close(dbm);
-/* Store the result in the tree for future reference. */
+/* Store the result in the tree for future reference. Take the taint status
+from the key for consistency even though it's unlikely we'll ever expand this. */
-t = store_get(sizeof(tree_node) + Ustrlen(key));
+t = store_get(sizeof(tree_node) + Ustrlen(key), is_tainted(key));
t->data.ptr = dbd;
Ustrcpy(t->name, key);
(void)tree_insertnode(anchor, t);
}
/* Make a single-item host list. */
-h = store_get(sizeof(host_item));
+h = store_get(sizeof(host_item), FALSE);
memset(h, 0, sizeof(host_item));
h->name = hostname;
h->port = portnum;
switch(control_type)
{
case CONTROL_AUTH_UNADVERTISED:
- f.allow_auth_unadvertised = TRUE;
- break;
+ f.allow_auth_unadvertised = TRUE;
+ break;
- #ifdef EXPERIMENTAL_BRIGHTMAIL
+#ifdef EXPERIMENTAL_BRIGHTMAIL
case CONTROL_BMI_RUN:
- bmi_run = 1;
- break;
- #endif
+ bmi_run = 1;
+ break;
+#endif
- #ifndef DISABLE_DKIM
+#ifndef DISABLE_DKIM
case CONTROL_DKIM_VERIFY:
- f.dkim_disable_verify = TRUE;
- #ifdef EXPERIMENTAL_DMARC
- /* Since DKIM was blocked, skip DMARC too */
- f.dmarc_disable_verify = TRUE;
- f.dmarc_enable_forensic = FALSE;
- #endif
+ f.dkim_disable_verify = TRUE;
+# ifdef SUPPORT_DMARC
+ /* Since DKIM was blocked, skip DMARC too */
+ f.dmarc_disable_verify = TRUE;
+ f.dmarc_enable_forensic = FALSE;
+# endif
break;
- #endif
+#endif
- #ifdef EXPERIMENTAL_DMARC
+#ifdef SUPPORT_DMARC
case CONTROL_DMARC_VERIFY:
- f.dmarc_disable_verify = TRUE;
- break;
+ f.dmarc_disable_verify = TRUE;
+ break;
case CONTROL_DMARC_FORENSIC:
- f.dmarc_enable_forensic = TRUE;
- break;
- #endif
+ f.dmarc_enable_forensic = TRUE;
+ break;
+#endif
case CONTROL_DSCP:
- if (*p == '/')
- {
- int fd, af, level, optname, value;
- /* If we are acting on stdin, the setsockopt may fail if stdin is not
- a socket; we can accept that, we'll just debug-log failures anyway. */
- fd = fileno(smtp_in);
- af = ip_get_address_family(fd);
- if (af < 0)
+ if (*p == '/')
{
- HDEBUG(D_acl)
- debug_printf_indent("smtp input is probably not a socket [%s], not setting DSCP\n",
- strerror(errno));
- break;
- }
- if (dscp_lookup(p+1, af, &level, &optname, &value))
- {
- if (setsockopt(fd, level, optname, &value, sizeof(value)) < 0)
+ int fd, af, level, optname, value;
+ /* If we are acting on stdin, the setsockopt may fail if stdin is not
+ a socket; we can accept that, we'll just debug-log failures anyway. */
+ fd = fileno(smtp_in);
+ if ((af = ip_get_address_family(fd)) < 0)
{
- HDEBUG(D_acl) debug_printf_indent("failed to set input DSCP[%s]: %s\n",
- p+1, strerror(errno));
+ HDEBUG(D_acl)
+ debug_printf_indent("smtp input is probably not a socket [%s], not setting DSCP\n",
+ strerror(errno));
+ break;
}
+ if (dscp_lookup(p+1, af, &level, &optname, &value))
+ if (setsockopt(fd, level, optname, &value, sizeof(value)) < 0)
+ {
+ HDEBUG(D_acl) debug_printf_indent("failed to set input DSCP[%s]: %s\n",
+ p+1, strerror(errno));
+ }
+ else
+ {
+ HDEBUG(D_acl) debug_printf_indent("set input DSCP to \"%s\"\n", p+1);
+ }
else
{
- HDEBUG(D_acl) debug_printf_indent("set input DSCP to \"%s\"\n", p+1);
+ *log_msgptr = string_sprintf("unrecognised DSCP value in \"control=%s\"", arg);
+ return ERROR;
}
}
else
{
- *log_msgptr = string_sprintf("unrecognised DSCP value in \"control=%s\"", arg);
+ *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg);
return ERROR;
}
- }
- else
- {
- *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg);
- return ERROR;
- }
- break;
+ break;
case CONTROL_ERROR:
- return ERROR;
+ return ERROR;
case CONTROL_CASEFUL_LOCAL_PART:
- deliver_localpart = addr->cc_local_part;
- break;
+ deliver_localpart = addr->cc_local_part;
+ break;
case CONTROL_CASELOWER_LOCAL_PART:
- deliver_localpart = addr->lc_local_part;
- break;
+ deliver_localpart = addr->lc_local_part;
+ break;
case CONTROL_ENFORCE_SYNC:
- smtp_enforce_sync = TRUE;
- break;
+ smtp_enforce_sync = TRUE;
+ break;
case CONTROL_NO_ENFORCE_SYNC:
- smtp_enforce_sync = FALSE;
- break;
+ smtp_enforce_sync = FALSE;
+ break;
- #ifdef WITH_CONTENT_SCAN
+#ifdef WITH_CONTENT_SCAN
case CONTROL_NO_MBOX_UNSPOOL:
- f.no_mbox_unspool = TRUE;
- break;
- #endif
+ f.no_mbox_unspool = TRUE;
+ break;
+#endif
case CONTROL_NO_MULTILINE:
- f.no_multiline_responses = TRUE;
- break;
+ f.no_multiline_responses = TRUE;
+ break;
case CONTROL_NO_PIPELINING:
- f.pipelining_enable = FALSE;
- break;
+ f.pipelining_enable = FALSE;
+ break;
case CONTROL_NO_DELAY_FLUSH:
- f.disable_delay_flush = TRUE;
- break;
+ f.disable_delay_flush = TRUE;
+ break;
case CONTROL_NO_CALLOUT_FLUSH:
- f.disable_callout_flush = TRUE;
- break;
+ f.disable_callout_flush = TRUE;
+ break;
case CONTROL_FAKEREJECT:
- cancel_cutthrough_connection(TRUE, US"fakereject");
- case CONTROL_FAKEDEFER:
- fake_response = (control_type == CONTROL_FAKEDEFER) ? DEFER : FAIL;
- if (*p == '/')
- {
- const uschar *pp = p + 1;
- while (*pp) pp++;
- fake_response_text = expand_string(string_copyn(p+1, pp-p-1));
- p = pp;
- }
- else
- {
- /* Explicitly reset to default string */
- fake_response_text = US"Your message has been rejected but is being kept for evaluation.\nIf it was a legitimate message, it may still be delivered to the target recipient(s).";
- }
- break;
+ cancel_cutthrough_connection(TRUE, US"fakereject");
+ case CONTROL_FAKEDEFER:
+ fake_response = (control_type == CONTROL_FAKEDEFER) ? DEFER : FAIL;
+ if (*p == '/')
+ {
+ const uschar *pp = p + 1;
+ while (*pp) pp++;
+ fake_response_text = expand_string(string_copyn(p+1, pp-p-1));
+ p = pp;
+ }
+ else /* Explicitly reset to default string */
+ fake_response_text = US"Your message has been rejected but is being kept for evaluation.\nIf it was a legitimate message, it may still be delivered to the target recipient(s).";
+ break;
case CONTROL_FREEZE:
- f.deliver_freeze = TRUE;
- deliver_frozen_at = time(NULL);
- freeze_tell = freeze_tell_config; /* Reset to configured value */
- if (Ustrncmp(p, "/no_tell", 8) == 0)
- {
- p += 8;
- freeze_tell = NULL;
- }
- if (*p != 0)
- {
- *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg);
- return ERROR;
- }
- cancel_cutthrough_connection(TRUE, US"item frozen");
- break;
+ f.deliver_freeze = TRUE;
+ deliver_frozen_at = time(NULL);
+ freeze_tell = freeze_tell_config; /* Reset to configured value */
+ if (Ustrncmp(p, "/no_tell", 8) == 0)
+ {
+ p += 8;
+ freeze_tell = NULL;
+ }
+ if (*p)
+ {
+ *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg);
+ return ERROR;
+ }
+ cancel_cutthrough_connection(TRUE, US"item frozen");
+ break;
- case CONTROL_QUEUE_ONLY:
- f.queue_only_policy = TRUE;
- cancel_cutthrough_connection(TRUE, US"queueing forced");
- break;
+ case CONTROL_QUEUE:
+ f.queue_only_policy = TRUE;
+ if (Ustrcmp(p, "_only") == 0)
+ p += 5;
+ else while (*p == '/')
+ if (Ustrncmp(p, "/only", 5) == 0)
+ { p += 5; f.queue_smtp = FALSE; }
+ else if (Ustrncmp(p, "/first_pass_route", 17) == 0)
+ { p += 17; f.queue_smtp = TRUE; }
+ else
+ break;
+ cancel_cutthrough_connection(TRUE, US"queueing forced");
+ break;
-#if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
- case CONTROL_REQUIRETLS:
- tls_requiretls |= REQUIRETLS_MSG;
- break;
-#endif
case CONTROL_SUBMISSION:
- originator_name = US"";
- f.submission_mode = TRUE;
- while (*p == '/')
- {
- if (Ustrncmp(p, "/sender_retain", 14) == 0)
- {
- p += 14;
- f.active_local_sender_retain = TRUE;
- f.active_local_from_check = FALSE;
- }
- else if (Ustrncmp(p, "/domain=", 8) == 0)
+ originator_name = US"";
+ f.submission_mode = TRUE;
+ while (*p == '/')
{
- const uschar *pp = p + 8;
- while (*pp && *pp != '/') pp++;
- submission_domain = string_copyn(p+8, pp-p-8);
- p = pp;
+ if (Ustrncmp(p, "/sender_retain", 14) == 0)
+ {
+ p += 14;
+ f.active_local_sender_retain = TRUE;
+ f.active_local_from_check = FALSE;
+ }
+ else if (Ustrncmp(p, "/domain=", 8) == 0)
+ {
+ const uschar *pp = p + 8;
+ while (*pp && *pp != '/') pp++;
+ submission_domain = string_copyn(p+8, pp-p-8);
+ p = pp;
+ }
+ /* The name= option must be last, because it swallows the rest of
+ the string. */
+ else if (Ustrncmp(p, "/name=", 6) == 0)
+ {
+ const uschar *pp = p + 6;
+ while (*pp) pp++;
+ submission_name = parse_fix_phrase(p+6, pp-p-6);
+ p = pp;
+ }
+ else break;
}
- /* The name= option must be last, because it swallows the rest of
- the string. */
- else if (Ustrncmp(p, "/name=", 6) == 0)
+ if (*p)
{
- const uschar *pp = p + 6;
- while (*pp) pp++;
- submission_name = string_copy(parse_fix_phrase(p+6, pp-p-6,
- big_buffer, big_buffer_size));
- p = pp;
+ *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg);
+ return ERROR;
}
- else break;
- }
- if (*p != 0)
- {
- *log_msgptr = string_sprintf("syntax error in \"control=%s\"", arg);
- return ERROR;
- }
- break;
+ break;
case CONTROL_DEBUG:
{
debug_logging_stop();
else
debug_logging_activate(debug_tag, debug_opts);
+ break;
}
- break;
case CONTROL_SUPPRESS_LOCAL_FIXUPS:
- f.suppress_local_fixups = TRUE;
- break;
+ f.suppress_local_fixups = TRUE;
+ break;
case CONTROL_CUTTHROUGH_DELIVERY:
- {
- uschar * ignored = NULL;
+ {
+ uschar * ignored = NULL;
#ifndef DISABLE_PRDR
- if (prdr_requested)
+ if (prdr_requested)
#else
- if (0)
+ if (0)
#endif
- /* Too hard to think about for now. We might in future cutthrough
- the case where both sides handle prdr and this-node prdr acl
- is "accept" */
- ignored = US"PRDR active";
- else
- {
- if (f.deliver_freeze)
+ /* Too hard to think about for now. We might in future cutthrough
+ the case where both sides handle prdr and this-node prdr acl
+ is "accept" */
+ ignored = US"PRDR active";
+ else if (f.deliver_freeze)
ignored = US"frozen";
else if (f.queue_only_policy)
ignored = US"queue-only";
else if (fake_response == FAIL)
ignored = US"fakereject";
+ else if (rcpt_count != 1)
+ ignored = US"nonfirst rcpt";
+ else if (cutthrough.delivery)
+ ignored = US"repeated";
+ else if (cutthrough.callout_hold_only)
+ {
+ DEBUG(D_acl)
+ debug_printf_indent(" cutthrough request upgrades callout hold\n");
+ cutthrough.callout_hold_only = FALSE;
+ cutthrough.delivery = TRUE; /* control accepted */
+ }
else
{
- if (rcpt_count == 1)
+ cutthrough.delivery = TRUE; /* control accepted */
+ while (*p == '/')
{
- cutthrough.delivery = TRUE; /* control accepted */
- while (*p == '/')
+ const uschar * pp = p+1;
+ if (Ustrncmp(pp, "defer=", 6) == 0)
{
- const uschar * pp = p+1;
- if (Ustrncmp(pp, "defer=", 6) == 0)
- {
- pp += 6;
- if (Ustrncmp(pp, "pass", 4) == 0) cutthrough.defer_pass = TRUE;
- /* else if (Ustrncmp(pp, "spool") == 0) ; default */
- }
- else
- while (*pp && *pp != '/') pp++;
- p = pp;
+ pp += 6;
+ if (Ustrncmp(pp, "pass", 4) == 0) cutthrough.defer_pass = TRUE;
+ /* else if (Ustrncmp(pp, "spool") == 0) ; default */
}
+ else
+ while (*pp && *pp != '/') pp++;
+ p = pp;
}
- else
- ignored = US"nonfirst rcpt";
}
+
+ DEBUG(D_acl) if (ignored)
+ debug_printf(" cutthrough request ignored on %s item\n", ignored);
}
- DEBUG(D_acl) if (ignored)
- debug_printf(" cutthrough request ignored on %s item\n", ignored);
- }
break;
#ifdef SUPPORT_I18N
case CONTROL_UTF8_DOWNCONVERT:
- if (*p == '/')
- {
- if (p[1] == '1')
+ if (*p == '/')
{
- message_utf8_downconvert = 1;
- addr->prop.utf8_downcvt = TRUE;
- addr->prop.utf8_downcvt_maybe = FALSE;
- p += 2;
- break;
+ if (p[1] == '1')
+ {
+ message_utf8_downconvert = 1;
+ addr->prop.utf8_downcvt = TRUE;
+ addr->prop.utf8_downcvt_maybe = FALSE;
+ p += 2;
+ break;
+ }
+ if (p[1] == '0')
+ {
+ message_utf8_downconvert = 0;
+ addr->prop.utf8_downcvt = FALSE;
+ addr->prop.utf8_downcvt_maybe = FALSE;
+ p += 2;
+ break;
+ }
+ if (p[1] == '-' && p[2] == '1')
+ {
+ message_utf8_downconvert = -1;
+ addr->prop.utf8_downcvt = FALSE;
+ addr->prop.utf8_downcvt_maybe = TRUE;
+ p += 3;
+ break;
+ }
+ *log_msgptr = US"bad option value for control=utf8_downconvert";
}
- if (p[1] == '0')
+ else
{
- message_utf8_downconvert = 0;
- addr->prop.utf8_downcvt = FALSE;
+ message_utf8_downconvert = 1;
+ addr->prop.utf8_downcvt = TRUE;
addr->prop.utf8_downcvt_maybe = FALSE;
- p += 2;
- break;
- }
- if (p[1] == '-' && p[2] == '1')
- {
- message_utf8_downconvert = -1;
- addr->prop.utf8_downcvt = FALSE;
- addr->prop.utf8_downcvt_maybe = TRUE;
- p += 3;
break;
}
- *log_msgptr = US"bad option value for control=utf8_downconvert";
- }
- else
- {
- message_utf8_downconvert = 1;
- addr->prop.utf8_downcvt = TRUE;
- addr->prop.utf8_downcvt_maybe = FALSE;
- break;
- }
- return ERROR;
+ return ERROR;
#endif
}
{
/* Separate the regular expression and any optional parameters. */
const uschar * list = arg;
- uschar *ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size);
+ uschar *ss = string_nextinlist(&list, &sep, NULL, 0);
/* Run the dcc backend. */
rc = dcc_process(&ss);
/* Modify return code based upon the existence of options. */
- while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
+ while ((ss = string_nextinlist(&list, &sep, NULL, 0)))
if (strcmpic(ss, US"defer_ok") == 0 && rc == DEFER)
rc = FAIL; /* FAIL so that the message is passed to the next ACL */
}
break;
#endif
- #ifdef EXPERIMENTAL_DMARC
+#ifdef SUPPORT_DMARC
case ACLC_DMARC_STATUS:
if (!f.dmarc_has_been_checked)
dmarc_process();
rc = match_isinlist(dmarc_exim_expand_query(DMARC_VERIFY_STATUS),
&arg,0,NULL,NULL,MCL_STRING,TRUE,NULL);
break;
- #endif
+#endif
case ACLC_DNSLISTS:
rc = verify_check_dnsbl(where, &arg, log_msgptr);
{
uschar *endcipher = NULL;
uschar *cipher = Ustrchr(tls_in.cipher, ':');
- if (cipher == NULL) cipher = tls_in.cipher; else
+ if (!cipher) cipher = tls_in.cipher; else
{
endcipher = Ustrchr(++cipher, ':');
- if (endcipher != NULL) *endcipher = 0;
+ if (endcipher) *endcipher = 0;
}
rc = match_isinlist(cipher, &arg, 0, NULL, NULL, MCL_STRING, TRUE, NULL);
- if (endcipher != NULL) *endcipher = ':';
+ if (endcipher) *endcipher = ':';
}
break;
case ACLC_HOSTS:
rc = verify_check_this_host(&arg, sender_host_cache, NULL,
- (sender_host_address == NULL)? US"" : sender_host_address,
- CUSS &host_data);
+ sender_host_address ? sender_host_address : US"", CUSS &host_data);
if (rc == DEFER) *log_msgptr = search_error_message;
- if (host_data) host_data = string_copy_malloc(host_data);
+ if (host_data) host_data = string_copy_perm(host_data, TRUE);
break;
case ACLC_LOCAL_PARTS:
int sep = 0;
const uschar *s = arg;
uschar * ss;
- while ((ss = string_nextinlist(&s, &sep, big_buffer, big_buffer_size)))
+ while ((ss = string_nextinlist(&s, &sep, NULL, 0)))
{
if (Ustrcmp(ss, "main") == 0) logbits |= LOG_MAIN;
else if (Ustrcmp(ss, "panic") == 0) logbits |= LOG_PANIC;
{
/* Separate the regular expression and any optional parameters. */
const uschar * list = arg;
- uschar * ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size);
+ uschar * ss = string_nextinlist(&list, &sep, NULL, 0);
uschar * opt;
BOOL defer_ok = FALSE;
int timeout = 0;
#endif
case ACLC_QUEUE:
+ if (is_tainted(arg))
+ {
+ *log_msgptr = string_sprintf("Tainted name '%s' for queue not permitted",
+ arg);
+ return ERROR;
+ }
if (Ustrchr(arg, '/'))
{
*log_msgptr = string_sprintf(
"Directory separator not permitted in queue name: '%s'", arg);
return ERROR;
}
- queue_name = string_copy_malloc(arg);
+ queue_name = string_copy_perm(arg, FALSE);
break;
case ACLC_RATELIMIT:
sender_address_cache, -1, 0, CUSS &sender_data);
break;
- /* Connection variables must persist forever */
+ /* Connection variables must persist forever; message variables not */
case ACLC_SET:
{
int old_pool = store_pool;
- if ( cb->u.varname[0] == 'c'
-#ifndef DISABLE_DKIM
- || cb->u.varname[0] == 'd'
-#endif
+ if ( cb->u.varname[0] != 'm'
#ifndef DISABLE_EVENT
|| event_name /* An event is being delivered */
#endif
{
/* Separate the regular expression and any optional parameters. */
const uschar * list = arg;
- uschar *ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size);
+ uschar *ss = string_nextinlist(&list, &sep, NULL, 0);
rc = spam(CUSS &ss);
/* Modify return code based upon the existence of options. */
- while ((ss = string_nextinlist(&list, &sep, big_buffer, big_buffer_size)))
+ while ((ss = string_nextinlist(&list, &sep, NULL, 0)))
if (strcmpic(ss, US"defer_ok") == 0 && rc == DEFER)
rc = FAIL; /* FAIL so that the message is passed to the next ACL */
}
for(;;)
{
- while (isspace(*acl_text)) acl_text++; /* Leading spaces/empty lines */
- if (*acl_text == 0) return NULL; /* No more data */
- yield = acl_text; /* Potential data line */
+ Uskip_whitespace(&acl_text); /* Leading spaces/empty lines */
+ if (!*acl_text) return NULL; /* No more data */
+ yield = acl_text; /* Potential data line */
while (*acl_text && *acl_text != '\n') acl_text++;
/* If we hit the end before a newline, we have the whole logical line. If
it's a comment, there's no more data to be given. Otherwise, yield it. */
- if (*acl_text == 0) return (*yield == '#')? NULL : yield;
+ if (!*acl_text) return *yield == '#' ? NULL : yield;
/* After reaching a newline, end this loop if the physical line does not
start with '#'. If it does, it's a comment, and the loop continues. */
else if (*ss == '/')
{
struct stat statbuf;
+ if (is_tainted(ss))
+ {
+ log_write(0, LOG_MAIN|LOG_PANIC,
+ "attempt to open tainted ACL file name \"%s\"", ss);
+ /* Avoid leaking info to an attacker */
+ *log_msgptr = US"internal configuration error";
+ return ERROR;
+ }
if ((fd = Uopen(ss, O_RDONLY, 0)) < 0)
{
*log_msgptr = string_sprintf("failed to open ACL file \"%s\": %s", ss,
strerror(errno));
return ERROR;
}
-
if (fstat(fd, &statbuf) != 0)
{
*log_msgptr = string_sprintf("failed to fstat ACL file \"%s\": %s", ss,
return ERROR;
}
- acl_text = store_get(statbuf.st_size + 1);
+ /* If the string being used as a filename is tainted, so is the file content */
+ acl_text = store_get(statbuf.st_size + 1, is_tainted(ss));
acl_text_end = acl_text + statbuf.st_size + 1;
if (read(fd, acl_text, statbuf.st_size) != statbuf.st_size)
if (!acl && *log_msgptr) return ERROR;
if (fd >= 0)
{
- tree_node *t = store_get_perm(sizeof(tree_node) + Ustrlen(ss));
+ tree_node *t = store_get_perm(sizeof(tree_node) + Ustrlen(ss), is_tainted(ss));
Ustrcpy(t->name, ss);
t->data.ptr = acl;
(void)tree_insertnode(&acl_anchor, t);
tree_node * node, ** root = name[0] == 'c' ? &acl_var_c : &acl_var_m;
if (!(node = tree_search(*root, name)))
{
- node = store_get(sizeof(tree_node) + Ustrlen(name));
+ node = store_get(sizeof(tree_node) + Ustrlen(name), is_tainted(name));
Ustrcpy(node->name, name);
(void)tree_insertnode(root, node);
}
acl_var_write(uschar *name, uschar *value, void *ctx)
{
FILE *f = (FILE *)ctx;
+if (is_tainted(value)) putc('-', f);
fprintf(f, "-acl%c %s %d\n%s\n", name[0], name+1, Ustrlen(value), value);
}
git://git.exim.org / users / jgh / exim.git / blobdiff