Bail out of copy if decryption is requested but the desired engine is missing.

This closes #2684, but handling of mixed crypto in a single message
needs more investigation.

1 files changed, 7 insertions, 1 deletions

diff --git a/copy.c b/copy.c
index 27b6dfcb..17c5db49 100644
--- a/copy.c
+++ b/copy.c
@@ -654,7 +654,7 @@ _mutt_copy_message (FILE *fpout, FILE *fpin, HEADER *hdr, BODY *body,
   else if (WithCrypto
            && (flags & M_CM_DECODE_CRYPT) && (hdr->security & ENCRYPT))
   {
-    BODY *cur;
+    BODY *cur = NULL;
     FILE *fp;
 
     if ((WithCrypto & APPLICATION_PGP)
@@ -674,6 +674,12 @@ _mutt_copy_message (FILE *fpout, FILE *fpin, HEADER *hdr, BODY *body,
 	return (-1);
     }
 
+    if (!cur)
+    {
+      mutt_error (_("No decryption engine available for message"));
+      return -1;
+    }
+
     mutt_write_mime_header (cur, fpout);
     fputc ('\n', fpout);