upstream commit

Replace atoi and strtol conversions for integer arguments
to config keywords with a checking wrapper around strtonum.  This will
prevent and flag invalid and negative arguments to these keywords.  ok djm@

OpenBSD-Commit-ID: 99ae3981f3d608a219ccb8d2fff635ae52c17998

1 files changed, 5 insertions, 11 deletions

diff --git a/readconf.c b/readconf.c
index 63baa7d78..10b57bd45 100644
--- a/readconf.c
+++ b/readconf.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: readconf.c,v 1.280 2017/10/21 23:06:24 millert Exp $ */
+/* $OpenBSD: readconf.c,v 1.281 2017/12/05 23:59:47 dtucker Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -817,6 +817,7 @@ process_config_line_depth(Options *options, struct passwd *pw, const char *host,
         const struct multistate *multistate_ptr;
         struct allowed_cname *cname;
         glob_t gl;
+        const char *errstr;
 
         if (activep == NULL) { /* We are processing a command line directive */
                 cmdline = 1;
@@ -1131,15 +1132,9 @@ parse_command:
                 intptr = &options->port;
 parse_int:
                 arg = strdelim(&s);
-                if (!arg || *arg == '\0')
-                        fatal("%.200s line %d: Missing argument.", filename, linenum);
-                if (arg[0] < '0' || arg[0] > '9')
-                        fatal("%.200s line %d: Bad number.", filename, linenum);
-
-                /* Octal, decimal, or hex format? */
-                value = strtol(arg, &endofnumber, 0);
-                if (arg == endofnumber)
-                        fatal("%.200s line %d: Bad number.", filename, linenum);
+                if ((errstr = atoi_err(arg, &value)) != NULL)
+                        fatal("%s line %d: integer value %s.",
+                            filename, linenum, errstr);
                 if (*activep && *intptr == -1)
                         *intptr = value;
                 break;
@@ -1534,7 +1529,6 @@ parse_keytypes:
         case oCanonicalDomains:
                 value = options->num_canonical_domains != 0;
                 while ((arg = strdelim(&s)) != NULL && *arg != '\0') {
-                        const char *errstr;
                         if (!valid_domain(arg, 1, &errstr)) {
                                 fatal("%s line %d: %s", filename, linenum,
                                     errstr);