#ifndef _FUNCTIONS_H_
#define _FUNCTIONS_H_
+#include <sys/time.h>
+
#ifdef EXIM_PERL
extern gstring *call_perl_cat(gstring *, uschar **, uschar *,
extern uschar * tls_cert_fprt_sha1(void *);
extern uschar * tls_cert_fprt_sha256(void *);
+extern void tls_clean_env(void);
extern BOOL tls_client_start(client_conn_ctx *, smtp_connect_args *,
void *, tls_support *, uschar **);
extern void tls_close(void *, int);
extern BOOL tls_could_read(void);
extern void tls_daemon_init(void);
-extern int tls_export_cert(uschar *, size_t, void *);
+extern BOOL tls_dropprivs_validate_require_cipher(BOOL);
+extern BOOL tls_export_cert(uschar *, size_t, void *);
extern int tls_feof(void);
extern int tls_ferror(void);
extern void tls_free_cert(void **);
extern int tls_getc(unsigned);
extern uschar *tls_getbuf(unsigned *);
extern void tls_get_cache(void);
-extern int tls_import_cert(const uschar *, void **);
+extern BOOL tls_import_cert(const uschar *, void **);
extern int tls_read(void *, uschar *, size_t);
extern int tls_server_start(const uschar *, uschar **);
extern BOOL tls_smtp_buffered(void);
#ifndef DISABLE_DKIM
extern gstring *authres_dkim(gstring *);
#endif
-#ifdef EXPERIMENTAL_DMARC
+#ifdef SUPPORT_DMARC
extern gstring *authres_dmarc(gstring *);
#endif
extern gstring *authres_smtpauth(gstring *);
#endif
extern uschar *b64encode(const uschar *, int);
+extern uschar *b64encode_taint(const uschar *, int, BOOL);
extern int b64decode(const uschar *, uschar **);
extern int bdat_getc(unsigned);
extern uschar *bdat_getbuf(unsigned *);
extern void debug_vprintf(int, const char *, va_list);
extern void decode_bits(unsigned int *, size_t, int *,
uschar *, bit_table *, int, uschar *, int);
+extern void delete_pid_file(void);
extern address_item *deliver_make_addr(uschar *, BOOL);
-extern void deliver_init(void);
extern void delivery_log(int, address_item *, int, uschar *);
extern int deliver_message(uschar *, BOOL, BOOL);
extern void deliver_msglog(const char *, ...) PRINTF_FUNCTION(1,2);
extern uschar *deliver_get_sender_address (uschar *id);
extern void delivery_re_exec(int);
+extern void die_tainted(const uschar *, const uschar *, int);
extern BOOL directory_make(const uschar *, const uschar *, int, BOOL);
#ifndef DISABLE_DKIM
-extern uschar *dkim_exim_query_dns_txt(uschar *);
+extern uschar *dkim_exim_query_dns_txt(const uschar *);
extern void dkim_exim_sign_init(void);
extern BOOL dkim_transport_write_message(transport_ctx *,
#endif
extern dns_address *dns_address_from_rr(dns_answer *, dns_record *);
extern int dns_basic_lookup(dns_answer *, const uschar *, int);
-extern void dns_build_reverse(const uschar *, uschar *);
+extern uschar *dns_build_reverse(const uschar *);
+extern time_t dns_expire_from_soa(dns_answer *, int);
extern void dns_init(BOOL, BOOL, BOOL);
extern BOOL dns_is_aa(const dns_answer *);
extern BOOL dns_is_secure(const dns_answer *);
extern void exim_exit(int, const uschar *) NORETURN;
extern void exim_nullstd(void);
extern void exim_setugid(uid_t, gid_t, BOOL, uschar *);
+extern void exim_underbar_exit(int);
extern void exim_wait_tick(struct timeval *, int);
extern int exp_bool(address_item *addr,
uschar *mtype, uschar *mname, unsigned dgb_opt, uschar *oname, BOOL bvalue,
const uschar *, const char *, ...) PRINTF_FUNCTION(4,5);
extern BOOL moan_to_sender(int, error_block *, header_line *, FILE *, BOOL);
extern void moan_write_from(FILE *);
+extern void moan_write_references(FILE *, uschar *);
extern FILE *modefopen(const uschar *, const char *, mode_t);
extern int open_cutthrough_connection( address_item * addr );
extern void smtp_command_sigterm_exit(void) NORETURN;
extern void smtp_data_timeout_exit(void) NORETURN;
extern void smtp_data_sigint_exit(void) NORETURN;
+extern void smtp_deliver_init(void);
extern uschar *smtp_cmd_hist(void);
extern int smtp_connect(smtp_connect_args *, const blob *);
extern int smtp_sock_connect(host_item *, int, int, uschar *,
extern void smtp_message_code(uschar **, int *, uschar **, uschar **, BOOL);
extern void smtp_proxy_tls(void *, uschar *, size_t, int *, int) NORETURN;
extern BOOL smtp_read_response(void *, uschar *, int, int, int);
-extern void smtp_reset(void *);
+extern void *smtp_reset(void *);
extern void smtp_respond(uschar *, int, BOOL, uschar *);
extern void smtp_notquit_exit(uschar *, uschar *, uschar *, ...);
extern void smtp_port_for_connect(host_item *, int);
extern FILE *spool_mbox(unsigned long *, const uschar *, uschar **);
#endif
extern void spool_clear_header_globals(void);
-extern uschar *spool_dname(const uschar *, uschar *);
-extern uschar *spool_fname(const uschar *, const uschar *, const uschar *, const uschar *);
extern BOOL spool_move_message(uschar *, uschar *, uschar *, uschar *);
extern int spool_open_datafile(uschar *);
extern int spool_open_temp(uschar *);
extern int spool_read_header(uschar *, BOOL, BOOL);
-extern uschar *spool_sname(const uschar *, uschar *);
extern int spool_write_header(uschar *, int, uschar **);
extern int stdin_getc(unsigned);
extern int stdin_feof(void);
extern int stdin_ferror(void);
extern int stdin_ungetc(int);
+
+extern void store_exit(void);
extern gstring *string_append(gstring *, int, ...) WARN_UNUSED_RESULT;
extern gstring *string_append_listele(gstring *, uschar, const uschar *) WARN_UNUSED_RESULT;
extern gstring *string_append_listele_n(gstring *, uschar, const uschar *, unsigned) WARN_UNUSED_RESULT;
extern uschar *string_copy_dnsdomain(uschar *);
extern uschar *string_copy_malloc(const uschar *);
extern uschar *string_dequote(const uschar **);
-extern gstring *string_fmt_append(gstring *, const char *, ...) ALMOST_PRINTF(2,3);
-extern BOOL string_format(uschar *, int, const char *, ...) ALMOST_PRINTF(3,4);
extern uschar *string_format_size(int, uschar *);
extern int string_interpret_escape(const uschar **);
extern int string_is_ip_address(const uschar *, int *);
extern BOOL string_is_utf8(const uschar *);
#endif
extern uschar *string_nextinlist(const uschar **, int *, uschar *, int);
-extern uschar *string_open_failed(int, const char *, ...) PRINTF_FUNCTION(2,3);
extern const uschar *string_printing2(const uschar *, BOOL);
extern uschar *string_split_message(uschar *);
-extern uschar *string_timediff(struct timeval *);
-extern uschar *string_timesince(struct timeval *);
extern uschar *string_unprinting(uschar *);
#ifdef SUPPORT_I18N
extern uschar *string_address_utf8_to_alabel(const uschar *, uschar **);
extern uschar *string_localpart_alabel_to_utf8(const uschar *, uschar **);
extern uschar *string_localpart_utf8_to_alabel(const uschar *, uschar **);
#endif
-extern gstring *string_vformat(gstring *, BOOL, const char *, va_list);
+
+#define string_format(buf, siz, fmt, ...) \
+ string_format_trc(buf, siz, US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
+extern BOOL string_format_trc(uschar *, int, const uschar *, unsigned,
+ const char *, ...) ALMOST_PRINTF(5,6);
+
+#define string_vformat(g, flgs, fmt, ap) \
+ string_vformat_trc(g, US __FUNCTION__, __LINE__, \
+ STRING_SPRINTF_BUFFER_SIZE, flgs, fmt, ap)
+extern gstring *string_vformat_trc(gstring *, const uschar *, unsigned,
+ unsigned, unsigned, const char *, va_list);
+
+#define string_open_failed(eno, fmt, ...) \
+ string_open_failed_trc(eno, US __FUNCTION__, __LINE__, fmt, __VA_ARGS__)
+extern uschar *string_open_failed_trc(int, const uschar *, unsigned,
+ const char *, ...) PRINTF_FUNCTION(4,5);
+
extern int strcmpic(const uschar *, const uschar *);
extern int strncmpic(const uschar *, const uschar *, int);
extern uschar *strstric(uschar *, uschar *, BOOL);
+extern int test_harness_fudged_queue_time(int);
+extern void tcp_init(void);
#ifdef EXIM_TFO_PROBE
extern void tfo_probe(void);
#endif
-extern void timesince(struct timeval * diff, struct timeval * then);
extern void tls_modify_variables(tls_support *);
extern uschar *tod_stamp(int);
extern void tree_add_duplicate(uschar *, address_item *);
extern void tree_add_nonrecipient(uschar *);
extern void tree_add_unusable(host_item *);
+extern void tree_dup(tree_node **, tree_node *);
extern int tree_insertnode(tree_node **, tree_node *);
extern tree_node *tree_search(tree_node *, const uschar *);
extern void tree_write(tree_node *, FILE *);
extern ssize_t write_to_fd_buf(int, const uschar *, size_t);
+/******************************************************************************/
+/* Predicate: if an address is in a tainted pool.
+By extension, a variable pointing to this address is tainted.
+*/
+
+static inline BOOL
+is_tainted(const void * p)
+{
+#if defined(COMPILE_UTILITY) || defined(MACRO_PREDEF) || defined(EM_VERSION_C)
+return FALSE;
+
+#else
+extern BOOL is_tainted_fn(const void *);
+extern void * tainted_base, * tainted_top;
+
+return f.taint_check_slow
+ ? is_tainted_fn(p) : p >= tainted_base && p < tainted_top;
+#endif
+}
+
+/******************************************************************************/
+/* String functions */
+static inline uschar * __Ustrcat(uschar * dst, const uschar * src, const char * func, int line)
+{
+#if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
+if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcat", CUS func, line);
+#endif
+return US strcat(CS dst, CCS src);
+}
+static inline uschar * __Ustrcpy(uschar * dst, const uschar * src, const char * func, int line)
+{
+#if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
+if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrcpy", CUS func, line);
+#endif
+return US strcpy(CS dst, CCS src);
+}
+static inline uschar * __Ustrncat(uschar * dst, const uschar * src, size_t n, const char * func, int line)
+{
+#if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
+if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncat", CUS func, line);
+#endif
+return US strncat(CS dst, CCS src, n);
+}
+static inline uschar * __Ustrncpy(uschar * dst, const uschar * src, size_t n, const char * func, int line)
+{
+#if !defined(COMPILE_UTILITY) && !defined(MACRO_PREDEF)
+if (!is_tainted(dst) && is_tainted(src)) die_tainted(US"Ustrncpy", CUS func, line);
+#endif
+return US strncpy(CS dst, CCS src, n);
+}
+/*XXX will likely need unchecked copy also */
+
+
+/******************************************************************************/
+
#if !defined(MACRO_PREDEF) && !defined(COMPILE_UTILITY)
/* exim_chown - in some NFSv4 setups *seemes* to be an issue with
chown(<exim-uid>, <exim-gid>).
return chown(CCS name, owner, group)
? exim_chown_failure(-1, name, owner, group) : 0;
}
-
#endif /* !MACRO_PREDEF && !COMPILE_UTILITY */
+
/******************************************************************************/
/* String functions */
+#if !defined(MACRO_PREDEF)
/*************************************************
* Copy and save string *
*************************************************/
/* This function assumes that memcpy() is faster than strcpy().
*/
-#if !defined(MACRO_PREDEF)
static inline uschar *
-string_copy(const uschar *s)
+string_copy_taint_trc(const uschar *s, BOOL tainted, const char * func, int line)
{
int len = Ustrlen(s) + 1;
-uschar *ss = store_get(len);
+uschar *ss = store_get_3(len, tainted, func, line);
memcpy(ss, s, len);
return ss;
}
+#define string_copy_taint(s, tainted) \
+ string_copy_taint_trc((s), tainted, __FUNCTION__, __LINE__)
+
+static inline uschar *
+string_copy_trc(const uschar * s, const char * func, int line)
+{
+return string_copy_taint_trc((s), is_tainted(s), func, line);
+}
+
+#define string_copy(s) \
+ string_copy_trc((s), __FUNCTION__, __LINE__)
+
/*************************************************
* Copy, lowercase and save string *
static inline uschar *
string_copylc(const uschar *s)
{
-uschar *ss = store_get(Ustrlen(s) + 1);
+uschar *ss = store_get(Ustrlen(s) + 1, is_tainted(s));
uschar *p = ss;
while (*s != 0) *p++ = tolower(*s++);
*p = 0;
static inline uschar *
string_copyn(const uschar *s, int n)
{
-uschar *ss = store_get(n + 1);
+uschar *ss = store_get(n + 1, is_tainted(s));
Ustrncpy(ss, s, n);
ss[n] = 0;
return ss;
static inline uschar *
string_copynlc(uschar *s, int n)
{
-uschar *ss = store_get(n + 1);
+uschar *ss = store_get(n + 1, is_tainted(s));
uschar *p = ss;
while (n-- > 0) *p++ = tolower(*s++);
*p = 0;
}
+# ifndef COMPILE_UTILITY
+/*************************************************
+* Copy and save string in longterm store *
+*************************************************/
+
+/* This function assumes that memcpy() is faster than strcpy().
+
+Argument: string to copy
+Returns: copy of string in new store
+*/
+
+static inline uschar *
+string_copy_perm(const uschar *s, BOOL force_taint)
+{
+int old_pool = store_pool;
+int len = Ustrlen(s) + 1;
+uschar *ss;
+
+store_pool = POOL_PERM;
+ss = store_get(len, force_taint || is_tainted(s));
+memcpy(ss, s, len);
+store_pool = old_pool;
+return ss;
+}
+# endif
+
+
+
+/* sprintf into a buffer, taint-unchecked */
+
+static inline void
+string_format_nt(uschar * buf, int siz, const char * fmt, ...)
+{
+gstring gs = { .size = siz, .ptr = 0, .s = buf };
+va_list ap;
+va_start(ap, fmt);
+(void) string_vformat(&gs, SVFMT_TAINT_NOCHK, fmt, ap);
+va_end(ap);
+}
+
+
+
/******************************************************************************/
/* Growable-string functions */
-/* Create a growable-string with some preassigned space, in untainted memory */
+/* Create a growable-string with some preassigned space */
+
+#define string_get_tainted(size, tainted) \
+ string_get_tainted_trc((size), (tainted), __FUNCTION__, __LINE__)
static inline gstring *
-string_get(unsigned size)
+string_get_tainted_trc(unsigned size, BOOL tainted, const char * func, unsigned line)
{
-gstring * g = store_get(sizeof(gstring) + size);
+gstring * g = store_get_3(sizeof(gstring) + size, tainted, func, line);
g->size = size;
g->ptr = 0;
g->s = US(g + 1);
return g;
}
+#define string_get(size) \
+ string_get_trc((size), __FUNCTION__, __LINE__)
+
+static inline gstring *
+string_get_trc(unsigned size, const char * func, unsigned line)
+{
+return string_get_tainted_trc(size, FALSE, func, line);
+}
+
/* NUL-terminate the C string in the growable-string, and return it. */
static inline uschar *
return g->s;
}
+static inline unsigned
+gstring_length(const gstring * g)
+{
+return g ? (unsigned)g->ptr : 0;
+}
+
+
+#define gstring_release_unused(g) \
+ gstring_release_unused_trc(g, __FUNCTION__, __LINE__)
+
+static inline void
+gstring_release_unused_trc(gstring * g, const char * file, unsigned line)
+{
+if (g) store_release_above_3(g->s + (g->size = g->ptr + 1), file, line);
+}
+
+
+/* sprintf-append to a growable-string */
+
+#define string_fmt_append(g, fmt, ...) \
+ string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
+ SVFMT_EXTEND|SVFMT_REBUFFER, fmt, __VA_ARGS__)
+
+#define string_fmt_append_f(g, flgs, fmt, ...) \
+ string_fmt_append_f_trc(g, US __FUNCTION__, __LINE__, \
+ flgs, fmt, __VA_ARGS__)
+
+static inline gstring *
+string_fmt_append_f_trc(gstring * g, const uschar * func, unsigned line,
+ unsigned flags, const char *format, ...)
+{
+va_list ap;
+va_start(ap, format);
+g = string_vformat_trc(g, func, line, STRING_SPRINTF_BUFFER_SIZE,
+ flags, format, ap);
+va_end(ap);
+return g;
+}
+
+/******************************************************************************/
+
+#define store_get_dns_answer() store_get_dns_answer_trc(CUS __FUNCTION__, __LINE__)
+
+static inline dns_answer *
+store_get_dns_answer_trc(const uschar * func, unsigned line)
+{
+return store_get_3(sizeof(dns_answer), TRUE, CCS func, line); /* use tainted mem */
+}
+
+/******************************************************************************/
+/* Routines with knowledge of spool layout */
+
+# ifndef COMPILE_UTILITY
+static inline void
+spool_pname_buf(uschar * buf, int len)
+{
+snprintf(CS buf, len, "%s/%s/input", spool_directory, queue_name);
+}
+
+static inline uschar *
+spool_dname(const uschar * purpose, uschar * subdir)
+{
+return string_sprintf("%s/%s/%s/%s",
+ spool_directory, queue_name, purpose, subdir);
+}
+# endif
+
+static inline uschar *
+spool_q_sname(const uschar * purpose, const uschar * q, uschar * subdir)
+{
+return string_sprintf("%s%s%s%s%s",
+ q, *q ? "/" : "",
+ purpose,
+ *subdir ? "/" : "", subdir);
+}
+
+static inline uschar *
+spool_sname(const uschar * purpose, uschar * subdir)
+{
+return spool_q_sname(purpose, queue_name, subdir);
+}
+
+static inline uschar *
+spool_q_fname(const uschar * purpose, const uschar * q,
+ const uschar * subdir, const uschar * fname, const uschar * suffix)
+{
+return string_sprintf("%s/%s/%s/%s/%s%s",
+ spool_directory, q, purpose, subdir, fname, suffix);
+}
+
+static inline uschar *
+spool_fname(const uschar * purpose, const uschar * subdir, const uschar * fname,
+ const uschar * suffix)
+{
+#ifdef COMPILE_UTILITY /* version avoiding string-extension */
+int len = Ustrlen(spool_directory) + 1 + Ustrlen(queue_name) + 1 + Ustrlen(purpose) + 1
+ + Ustrlen(subdir) + 1 + Ustrlen(fname) + Ustrlen(suffix) + 1;
+uschar * buf = store_get(len, FALSE);
+string_format(buf, len, "%s/%s/%s/%s/%s%s",
+ spool_directory, queue_name, purpose, subdir, fname, suffix);
+return buf;
+#else
+return spool_q_fname(purpose, queue_name, subdir, fname, suffix);
+#endif
+}
+
+static inline void
+set_subdir_str(uschar * subdir_str, const uschar * name,
+ int search_sequence)
+{
+subdir_str[0] = split_spool_directory == (search_sequence == 0)
+ ? name[5] : '\0';
+subdir_str[1] = '\0';
+}
+
+/******************************************************************************/
+/* Time calculations */
+
+static inline void
+timesince(struct timeval * diff, const struct timeval * then)
+{
+gettimeofday(diff, NULL);
+diff->tv_sec -= then->tv_sec;
+if ((diff->tv_usec -= then->tv_usec) < 0)
+ {
+ diff->tv_sec--;
+ diff->tv_usec += 1000*1000;
+ }
+}
+
+static inline uschar *
+string_timediff(const struct timeval * diff)
+{
+static uschar buf[sizeof("0.000s")];
+
+if (diff->tv_sec >= 5 || !LOGGING(millisec))
+ return readconf_printtime((int)diff->tv_sec);
+
+snprintf(CS buf, sizeof(buf), "%u.%03us", (uint)diff->tv_sec, (uint)diff->tv_usec/1000);
+return buf;
+}
+
+
+static inline uschar *
+string_timesince(const struct timeval * then)
+{
+struct timeval diff;
+timesince(&diff, then);
+return string_timediff(&diff);
+}
+
static inline void
-gstring_release_unused(gstring * g)
+report_time_since(const struct timeval * t0, const uschar * where)
{
-if (g) store_reset(g->s + (g->size = g->ptr + 1));
+# ifdef MEASURE_TIMING
+struct timeval diff;
+timesince(&diff, t0);
+fprintf(stderr, "%d %s:\t%ld.%06ld\n",
+ (uint)getpid(), where, (long)diff.tv_sec, (long)diff.tv_usec);
+# endif
+}
+
+
+static inline void
+testharness_pause_ms(int millisec)
+{
+#ifndef MEASURE_TIMING
+if (f.running_in_test_harness) millisleep(millisec);
+#endif
}
/******************************************************************************/
+/* Taint-checked file opens */
+
+static inline int
+exim_open2(const char *pathname, int flags)
+{
+if (!is_tainted(pathname)) return open(pathname, flags);
+log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'\n", pathname);
+errno = EACCES;
+return -1;
+}
+static inline int
+exim_open(const char *pathname, int flags, mode_t mode)
+{
+if (!is_tainted(pathname)) return open(pathname, flags, mode);
+log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'\n", pathname);
+errno = EACCES;
+return -1;
+}
+static inline int
+exim_openat(int dirfd, const char *pathname, int flags)
+{
+if (!is_tainted(pathname)) return openat(dirfd, pathname, flags);
+log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'\n", pathname);
+errno = EACCES;
+return -1;
+}
+static inline int
+exim_openat4(int dirfd, const char *pathname, int flags, mode_t mode)
+{
+if (!is_tainted(pathname)) return openat(dirfd, pathname, flags, mode);
+log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'\n", pathname);
+errno = EACCES;
+return -1;
+}
+
+static inline FILE *
+exim_fopen(const char *pathname, const char *mode)
+{
+if (!is_tainted(pathname)) return fopen(pathname, mode);
+log_write(0, LOG_MAIN|LOG_PANIC, "Tainted filename '%s'\n", pathname);
+errno = EACCES;
+return NULL;
+}
+
#endif /* !MACRO_PREDEF */
#endif /* _FUNCTIONS_H_ */
projects / exim.git / blobdiff