Add 'third_party/nix/' from commit 'be66c7a6b24e3c3c6157fd37b86c7203d14acf10'

git-subtree-dir: third_party/nix
git-subtree-mainline: cf8cd640c1
git-subtree-split: be66c7a6b24e3c3c6157fd37b86c7203d14acf10

third_party/nix/tests/secure-drv-outputs.sh

@@ -0,0 +1,36 @@
+# Test that users cannot register specially-crafted derivations that
+# produce output paths belonging to other derivations.  This could be
+# used to inject malware into the store.
+
+source common.sh
+
+clearStore
+
+startDaemon
+
+# Determine the output path of the "good" derivation.
+goodOut=$(nix-store -q $(nix-instantiate ./secure-drv-outputs.nix -A good))
+
+# Instantiate the "bad" derivation.
+badDrv=$(nix-instantiate ./secure-drv-outputs.nix -A bad)
+badOut=$(nix-store -q $badDrv)
+
+# Rewrite the bad derivation to produce the output path of the good
+# derivation.
+rm -f $TEST_ROOT/bad.drv
+sed -e "s|$badOut|$goodOut|g" < $badDrv > $TEST_ROOT/bad.drv
+
+# Add the manipulated derivation to the store and build it.  This
+# should fail.
+if badDrv2=$(nix-store --add $TEST_ROOT/bad.drv); then
+    nix-store -r "$badDrv2"
+fi
+
+# Now build the good derivation.
+goodOut2=$(nix-build ./secure-drv-outputs.nix -A good --no-out-link)
+test "$goodOut" = "$goodOut2"
+
+if ! test -e "$goodOut"/good; then
+    echo "Bad derivation stole the output path of the good derivation!"
+    exit 1
+fi