[PATCH v2 01/21] mime-node: handle decrypt_result more safely

[Daniel Kahn Gillmor <dkg@fifthhorseman.net>]

If (for whatever reason) we don't get a decrypt_result back, or it's
not structured the way we expect it to be, we shouldn't choke on it.
---
 mime-node.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/mime-node.c b/mime-node.c
index e1aca969..7c8b2602 100644
--- a/mime-node.c
+++ b/mime-node.c
@@ -214,13 +214,15 @@ node_decrypt_and_verify (mime_node_t *node, GMimeObject *part,
     node->decrypt_success = true;
     node->verify_attempted = true;
 
-    /* This may be NULL if the part is not signed. */
-    node->sig_list = g_mime_decrypt_result_get_signatures (decrypt_result);
-    if (node->sig_list) {
-	g_object_ref (node->sig_list);
-	set_signature_list_destructor (node);
+    if (decrypt_result) {
+	/* This may be NULL if the part is not signed. */
+	node->sig_list = g_mime_decrypt_result_get_signatures (decrypt_result);
+	if (node->sig_list) {
+	    g_object_ref (node->sig_list);
+	    set_signature_list_destructor (node);
+	}
+	g_object_unref (decrypt_result);
     }
-    g_object_unref (decrypt_result);
 
  DONE:
     if (err)
-- 
2.15.0