forked from rpms/openssh
81 lines
2.3 KiB
Diff
81 lines
2.3 KiB
Diff
diff --git a/ChangeLog b/ChangeLog
|
|
index 38de846..1603a07 100644
|
|
--- a/ChangeLog
|
|
+++ b/ChangeLog
|
|
@@ -1,3 +1,14 @@
|
|
+20140420
|
|
+ - djm@cvs.openbsd.org 2014/04/01 03:34:10
|
|
+ [sshconnect.c]
|
|
+ When using VerifyHostKeyDNS with a DNSSEC resolver, down-convert any
|
|
+ certificate keys to plain keys and attempt SSHFP resolution.
|
|
+
|
|
+ Prevents a server from skipping SSHFP lookup and forcing a new-hostkey
|
|
+ dialog by offering only certificate keys.
|
|
+
|
|
+ Reported by mcv21 AT cam.ac.uk
|
|
+
|
|
20140313
|
|
- (djm) Release OpenSSH 6.6
|
|
|
|
diff --git a/sshconnect.c b/sshconnect.c
|
|
index 394cca8..e636f33 100644
|
|
--- a/sshconnect.c
|
|
+++ b/sshconnect.c
|
|
@@ -1219,30 +1219,40 @@ verify_host_key(char *host, struct sockaddr *hostaddr, Key *host_key)
|
|
{
|
|
int flags = 0;
|
|
char *fp;
|
|
+ Key *plain = NULL;
|
|
|
|
fp = key_selected_fingerprint(host_key, SSH_FP_HEX);
|
|
debug("Server host key: %s %s%s", key_type(host_key),
|
|
key_fingerprint_prefix(), fp);
|
|
free(fp);
|
|
|
|
- /* XXX certs are not yet supported for DNS */
|
|
- if (!key_is_cert(host_key) && options.verify_host_key_dns &&
|
|
- verify_host_key_dns(host, hostaddr, host_key, &flags) == 0) {
|
|
- if (flags & DNS_VERIFY_FOUND) {
|
|
-
|
|
- if (options.verify_host_key_dns == 1 &&
|
|
- flags & DNS_VERIFY_MATCH &&
|
|
- flags & DNS_VERIFY_SECURE)
|
|
- return 0;
|
|
-
|
|
- if (flags & DNS_VERIFY_MATCH) {
|
|
- matching_host_key_dns = 1;
|
|
- } else {
|
|
- warn_changed_key(host_key);
|
|
- error("Update the SSHFP RR in DNS with the new "
|
|
- "host key to get rid of this message.");
|
|
+ if (options.verify_host_key_dns) {
|
|
+ /*
|
|
+ * XXX certs are not yet supported for DNS, so downgrade
|
|
+ * them and try the plain key.
|
|
+ */
|
|
+ plain = key_from_private(host_key);
|
|
+ if (key_is_cert(plain))
|
|
+ key_drop_cert(plain);
|
|
+ if (verify_host_key_dns(host, hostaddr, plain, &flags) == 0) {
|
|
+ if (flags & DNS_VERIFY_FOUND) {
|
|
+ if (options.verify_host_key_dns == 1 &&
|
|
+ flags & DNS_VERIFY_MATCH &&
|
|
+ flags & DNS_VERIFY_SECURE) {
|
|
+ key_free(plain);
|
|
+ return 0;
|
|
+ }
|
|
+ if (flags & DNS_VERIFY_MATCH) {
|
|
+ matching_host_key_dns = 1;
|
|
+ } else {
|
|
+ warn_changed_key(plain);
|
|
+ error("Update the SSHFP RR in DNS "
|
|
+ "with the new host key to get rid "
|
|
+ "of this message.");
|
|
+ }
|
|
}
|
|
}
|
|
+ key_free(plain);
|
|
}
|
|
|
|
return check_host_key(host, hostaddr, options.port, host_key, RDRW,
|