* Exim - an Internet mail transport agent *
*************************************************/
+/* Copyright (c) The Exim Maintainers 2021 - 2024 */
/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Functions concerned with rewriting headers */
{
const uschar *yield = s;
const uschar *subject = s;
-uschar *domain = NULL;
+const uschar *domain = NULL;
BOOL done = FALSE;
int rule_number = 1;
int yield_start = 0, yield_end = 0;
{
int start, end, pdomain;
int count = 0;
- uschar *save_localpart;
- const uschar *save_domain;
- uschar *error, *new;
+ const uschar * save_localpart;
+ const uschar * save_domain;
+ uschar * error, * new;
const uschar * newparsed;
/* Come back here for a repeat after a successful rewrite. We do this
if (flag & rewrite_smtp)
{
- uschar *key = expand_string(rule->key);
+ BOOL textonly_re;
+ const uschar * key = expand_string_2(rule->key, &textonly_re);
if (!key)
{
if (!f.expand_string_forcedfail)
"checking for SMTP rewriting: %s", rule->key, expand_string_message);
continue;
}
- if (match_check_string(subject, key, 0, TRUE, FALSE, FALSE, NULL) != OK)
+ if (match_check_string(subject, key, 0,
+ textonly_re ? MCS_CACHEABLE | MCS_PARTIAL : MCS_PARTIAL, NULL) != OK)
continue;
new = expand_string(rule->replacement);
}
else
{
- if (!domain) domain = Ustrrchr(subject, '@') + 1;
+ if (!domain) domain = CUstrrchr(subject, '@') + 1;
/* Use the general function for matching an address against a list (here
just one item, so use the "impossible value" separator UCHAR_MAX+1). */
save_domain = deliver_domain;
/* We have subject pointing to "localpart@domain" and domain pointing to
- the domain. Temporarily terminate the local part so that it can be
- set up as an expansion variable */
+ the domain. Split into local part and domain so that it can be set up as
+ an expansion variable */
- domain[-1] = 0;
- deliver_localpart = US subject;
+ deliver_localpart = US string_copyn(subject, domain-subject-1);
deliver_domain = domain;
new = expand_string(rule->replacement);
- domain[-1] = '@';
deliver_localpart = save_localpart;
deliver_domain = save_domain;
}
rewrite_rule *rewrite_rules, int existflags, BOOL replace)
{
int lastnewline = 0;
-header_line *newh = NULL;
+header_line * newh = NULL;
rmark function_reset_point = store_mark();
-uschar *s = Ustrchr(h->text, ':') + 1;
+uschar * s = Ustrchr(h->text, ':') + 1;
-while (isspace(*s)) s++;
+Uskip_whitespace(&s);
-DEBUG(D_rewrite)
- debug_printf("rewrite_one_header: type=%c:\n %s", h->type, h->text);
+DEBUG(D_rewrite) /* The header text includes the trailing newline */
+ debug_printf_indent("rewrite_one_header: type=%c:\n %s", h->type, h->text);
f.parse_allow_group = TRUE; /* Allow group syntax */
while (*s)
{
- uschar *sprev;
- uschar *ss = parse_find_address_end(s, FALSE);
- uschar *recipient, *new, *errmess;
+ uschar * sprev = s;
+ uschar * ss = parse_find_address_end(s, FALSE), * ss1 = ss;
+ uschar * recipient, * new;
rmark loop_reset_point = store_mark();
+ uschar * errmess = NULL;
BOOL changed = FALSE;
- int terminator = *ss;
+ uschar terminator = *ss;
int start, end, domain;
+ /* If we hit the end of the header, trim trailing newline and whitespace */
+
+ if (!terminator)
+ {
+ while (ss1 > s && isspace(ss1[-1])) ss1--;
+ terminator = *ss1;
+ }
+
/* Temporarily terminate the string at this point, and extract the
operative address within. Then put back the terminator and prepare for
the next address, saving the start of the old one. */
- *ss = 0;
+ *ss1 = '\0';
recipient = parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
- *ss = terminator;
- sprev = s;
- s = ss + (terminator ? 1 :0);
- while (isspace(*s)) s++;
+ *ss1 = terminator;
+ s = ss + (*ss ? 1 : 0);
+ Uskip_whitespace(&s);
/* There isn't much we can do for syntactic disasters at this stage.
- Pro tem (possibly for ever) ignore them. */
+ Pro tem (possibly for ever) ignore them.
+ If we got nothing, then there was any sort of error: non-parsable address,
+ empty address, overlong addres. Sometimes the result matters, sometimes not.
+ It seems this function is called for *any* header we see. */
if (!recipient)
{
+ /* Log unparesable addresses in the header. Slightly ugly because a
+ null output from the extract can also result from a header without an
+ address, "To: undisclosed recpients:;" being the classic case. Ignore
+ this one and carry on. */
+
+ if (Ustrcmp(errmess, "empty address") != 0)
+ log_write(0, LOG_MAIN, "qualify/rewrite: %s", errmess);
+
loop_reset_point = store_reset(loop_reset_point);
continue;
}
point, because we may have a rewritten line from a previous time round the
loop. */
- if (!changed) loop_reset_point = store_reset(loop_reset_point);
+ if (!changed)
+ loop_reset_point = store_reset(loop_reset_point);
/* If the address has changed, create a new header containing the
rewritten address. We do not need to set the chain pointers at this
int oldlen = end - start;
header_line * prev = newh ? newh : h;
- uschar * newt = store_get_perm(prev->slen - oldlen + newlen + 4, TRUE);
+ uschar * newt = store_get_perm(prev->slen - oldlen + newlen + 4, GET_TAINTED);
uschar * newtstart = newt;
int type = prev->type;
store_reset(function_reset_point);
function_reset_point = store_mark();
- newh = store_get(sizeof(header_line), FALSE);
+ newh = store_get(sizeof(header_line), GET_UNTAINTED);
newh->type = type;
newh->slen = slen;
newh->text = string_copyn(newtstart, slen);
git://git.exim.org / exim.git / blobdiff