GSSAPI key exchange support

This patch has been rejected upstream: "None of the OpenSSH developers are
in favour of adding this, and this situation has not changed for several
years.  This is not a slight on Simon's patch, which is of fine quality, but
just that a) we don't trust GSSAPI implementations that much and b) we don't
like adding new KEX since they are pre-auth attack surface.  This one is
particularly scary, since it requires hooks out to typically root-owned
system resources."

However, quite a lot of people rely on this in Debian, and it's better to
have it merged into the main openssh package rather than having separate
-krb5 packages (as we used to have).  It seems to have a generally good
security history.

Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1242
Last-Updated: 2014-10-07

Patch-Name: gssapi.patch

1 files changed, 57 insertions, 0 deletions

diff --git a/configure b/configure
index 6815388cc..ea5f200e8 100755
--- a/configure
+++ b/configure
@@ -7168,6 +7168,63 @@ $as_echo "#define SSH_TUN_COMPAT_AF 1" >>confdefs.h
 
 $as_echo "#define SSH_TUN_PREPEND_AF 1" >>confdefs.h
 
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking if we have the Security Authorization Session API" >&5
+$as_echo_n "checking if we have the Security Authorization Session API... " >&6; }
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <Security/AuthSession.h>
+int
+main ()
+{
+SessionCreate(0, 0);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_use_security_session_api="yes"
+
+$as_echo "#define USE_SECURITY_SESSION_API 1" >>confdefs.h
+
+                 LIBS="$LIBS -framework Security"
+                 { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+else
+  ac_cv_use_security_session_api="no"
+                 { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+        { $as_echo "$as_me:${as_lineno-$LINENO}: checking if we have an in-memory credentials cache" >&5
+$as_echo_n "checking if we have an in-memory credentials cache... " >&6; }
+        cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <Kerberos/Kerberos.h>
+int
+main ()
+{
+cc_context_t c;
+                 (void) cc_initialize (&c, 0, NULL, NULL);
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+$as_echo "#define USE_CCAPI 1" >>confdefs.h
+
+                 LIBS="$LIBS -framework Security"
+                 { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+                 if test "x$ac_cv_use_security_session_api" = "xno"; then
+                        as_fn_error $? "*** Need a security framework to use the credentials cache API ***" "$LINENO" 5
+                fi
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
         ac_fn_c_check_decl "$LINENO" "AU_IPv4" "ac_cv_have_decl_AU_IPv4" "$ac_includes_default"
 if test "x$ac_cv_have_decl_AU_IPv4" = xyes; then :