Throw an exception if we try to make KDMs for an unencrypted project (#1188).

2 files changed, 6 insertions, 2 deletions

diff --git a/cscript b/cscript
index 1d99e27c9..984295774 100644
--- a/cscript
+++ b/cscript
@@ -283,8 +283,8 @@ def dependencies(target):
         ffmpeg_options = {}
 
     return (('ffmpeg-cdist', '5fce90f', ffmpeg_options),
-            ('libdcp', '0a47e4c'),
-            ('libsub', '688c501'),
+            ('libdcp', 'f19fba7'),
+            ('libsub', 'c6193e4'),
             ('rtaudio-cdist', None))
 
 def configure_options(target):
diff --git a/src/lib/film.cc b/src/lib/film.cc
index 386f456b5..2b045f5c4 100644
--- a/src/lib/film.cc
+++ b/src/lib/film.cc
@@ -1218,6 +1218,10 @@ Film::make_kdm (
 	dcp::Formulation formulation
 	) const
 {
+	if (!_encrypted) {
+		throw runtime_error (_("Cannot make a KDM as this project is not encrypted."));
+	}
+
 	shared_ptr<const dcp::CPL> cpl (new dcp::CPL (cpl_file));
 	shared_ptr<const dcp::CertificateChain> signer = Config::instance()->signer_chain ();
 	if (!signer->valid ()) {