File openssh-7.2p2-ssh_case_insensitive_host_matching.patch of Package openssh.21987

# HG changeset patch
# Parent  3f4d92ce6f3b3aca2eb2bd9acc03adb723cf38c9
Match hostnames in a case-insensitive manner.

bsc#1017099

diff --git a/openssh-7.2p2/readconf.c b/openssh-7.2p2/readconf.c
--- a/openssh-7.2p2/readconf.c
+++ b/openssh-7.2p2/readconf.c
@@ -526,16 +526,17 @@ execute_in_shell(const char *cmd)
  * Parse and execute a Match directive.
  */
 static int
 match_cfg_line(Options *options, char **condition, struct passwd *pw,
     const char *host_arg, const char *original_host, int post_canon,
     const char *filename, int linenum)
 {
 	char *arg, *oattrib, *attrib, *cmd, *cp = *condition, *host, *criteria;
+	char *hostlc;
 	const char *ruser;
 	int r, port, this_result, result = 1, attributes = 0, negate;
 	char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
 
 	/*
 	 * Configuration is likely to be incomplete at this point so we
 	 * must be prepared to use default values.
 	 */
@@ -546,16 +547,20 @@ match_cfg_line(Options *options, char **
 	} else if (options->hostname != NULL) {
 		/* NB. Please keep in sync with ssh.c:main() */
 		host = percent_expand(options->hostname,
 		    "h", host_arg, (char *)NULL);
 	} else {
 		host = xstrdup(host_arg);
 	}
 
+	/* match_hostname() requires the hostname to be lowercase */
+	hostlc = xstrdup(host);
+	lowercase(hostlc);
+
 	debug2("checking match for '%s' host %s originally %s",
 	    cp, host, original_host);
 	while ((oattrib = attrib = strdelim(&cp)) && *attrib != '\0') {
 		criteria = NULL;
 		this_result = 1;
 		if ((negate = attrib[0] == '!'))
 			attrib++;
 		/* criteria "all" and "canonical" have no argument */
@@ -584,18 +589,18 @@ match_cfg_line(Options *options, char **
 		}
 		/* All other criteria require an argument */
 		if ((arg = strdelim(&cp)) == NULL || *arg == '\0') {
 			error("Missing Match criteria for %s", attrib);
 			result = -1;
 			goto out;
 		}
 		if (strcasecmp(attrib, "host") == 0) {
-			criteria = xstrdup(host);
-			r = match_hostname(host, arg) == 1;
+			criteria = xstrdup(hostlc);
+			r = match_hostname(hostlc, arg) == 1;
 			if (r == (negate ? 1 : 0))
 				this_result = result = 0;
 		} else if (strcasecmp(attrib, "originalhost") == 0) {
 			criteria = xstrdup(original_host);
 			r = match_hostname(original_host, arg) == 1;
 			if (r == (negate ? 1 : 0))
 				this_result = result = 0;
 		} else if (strcasecmp(attrib, "user") == 0) {
@@ -658,16 +663,17 @@ match_cfg_line(Options *options, char **
 		error("One or more attributes required for Match");
 		result = -1;
 		goto out;
 	}
  out:
 	if (result != -1)
 		debug2("match %sfound", result ? "" : "not ");
 	*condition = cp;
+	free(hostlc);
 	free(host);
 	return result;
 }
 
 /* Check and prepare a domain name: removes trailing '.' and lowercases */
 static void
 valid_domain(char *name, const char *filename, int linenum)
 {