1 files changed, 94 insertions, 0 deletions

diff --git a/debian/patches/dnssec-sshfp.patch b/debian/patches/dnssec-sshfp.patch
new file mode 100644
index 000000000..e2acdf1a2
--- /dev/null
+++ b/debian/patches/dnssec-sshfp.patch
@@ -0,0 +1,94 @@
+From 0ee33d93c5c7a5fbb8b027aa24e7c9668125fda9 Mon Sep 17 00:00:00 2001
+From: Colin Watson <cjwatson@debian.org>
+Date: Sun, 9 Feb 2014 16:10:01 +0000
+Subject: Force use of DNSSEC even if "options edns0" isn't in resolv.conf
+
+This allows SSHFP DNS records to be verified if glibc 2.11 is installed.
+
+Origin: vendor, https://cvs.fedoraproject.org/viewvc/F-12/openssh/openssh-5.2p1-edns.patch?revision=1.1&view=markup
+Bug: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=572049
+Bug-Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=572049
+Last-Update: 2010-04-06
+
+Patch-Name: dnssec-sshfp.patch
+---
+ dns.c                           | 14 +++++++++++++-
+ openbsd-compat/getrrsetbyname.c | 10 +++++-----
+ openbsd-compat/getrrsetbyname.h |  3 +++
+ 3 files changed, 21 insertions(+), 6 deletions(-)
+
+diff --git a/dns.c b/dns.c
+index ff1a2c41c..82ec97199 100644
+--- a/dns.c
++++ b/dns.c
+@@ -211,6 +211,7 @@ verify_host_key_dns(const char *hostname, struct sockaddr *address,
+ {
+        u_int counter;
+        int result;
++       unsigned int rrset_flags = 0;
+        struct rrsetinfo *fingerprints = NULL;
+ 
+        u_int8_t hostkey_algorithm;
+@@ -234,8 +235,19 @@ verify_host_key_dns(const char *hostname, struct sockaddr *address,
+                return -1;
+        }
+ 
++       /*
++        * Original getrrsetbyname function, found on OpenBSD for example,
++        * doesn't accept any flag and prerequisite for obtaining AD bit in
++        * DNS response is set by "options edns0" in resolv.conf.
++        *
++        * Our version is more clever and use RRSET_FORCE_EDNS0 flag.
++        */
++#ifndef HAVE_GETRRSETBYNAME
++       rrset_flags |= RRSET_FORCE_EDNS0;
++#endif
+        result = getrrsetbyname(hostname, DNS_RDATACLASS_IN,
+-           DNS_RDATATYPE_SSHFP, 0, &fingerprints);
++           DNS_RDATATYPE_SSHFP, rrset_flags, &fingerprints);
++
+        if (result) {
+                verbose("DNS lookup error: %s", dns_result_totext(result));
+                return -1;
+diff --git a/openbsd-compat/getrrsetbyname.c b/openbsd-compat/getrrsetbyname.c
+index dc6fe0533..e061a290a 100644
+--- a/openbsd-compat/getrrsetbyname.c
++++ b/openbsd-compat/getrrsetbyname.c
+@@ -209,8 +209,8 @@ getrrsetbyname(const char *hostname, unsigned int rdclass,
+                goto fail;
+        }
+ 
+-       /* don't allow flags yet, unimplemented */
+-       if (flags) {
++       /* Allow RRSET_FORCE_EDNS0 flag only. */
++       if ((flags & !RRSET_FORCE_EDNS0) != 0) {
+                result = ERRSET_INVAL;
+                goto fail;
+        }
+@@ -226,9 +226,9 @@ getrrsetbyname(const char *hostname, unsigned int rdclass,
+ #endif /* DEBUG */
+ 
+ #ifdef RES_USE_DNSSEC
+-       /* turn on DNSSEC if EDNS0 is configured */
+-       if (_resp->options & RES_USE_EDNS0)
+-               _resp->options |= RES_USE_DNSSEC;
++       /* turn on DNSSEC if required  */
++       if (flags & RRSET_FORCE_EDNS0)
++               _resp->options |= (RES_USE_EDNS0|RES_USE_DNSSEC);
+ #endif /* RES_USE_DNSEC */
+ 
+        /* make query */
+diff --git a/openbsd-compat/getrrsetbyname.h b/openbsd-compat/getrrsetbyname.h
+index 1283f5506..dbbc85a2a 100644
+--- a/openbsd-compat/getrrsetbyname.h
++++ b/openbsd-compat/getrrsetbyname.h
+@@ -72,6 +72,9 @@
+ #ifndef RRSET_VALIDATED
+ # define RRSET_VALIDATED       1
+ #endif
++#ifndef RRSET_FORCE_EDNS0
++# define RRSET_FORCE_EDNS0     0x0001
++#endif
+ 
+ /*
+  * Return codes for getrrsetbyname()