Allow gcry_mpi_dump to print opaque MPIs.

* mpi/mpicoder.c (gcry_mpi_dump): Detect abd print opaque MPIs.
* tests/mpitests.c (test_opaque): New.
(main): Call new test.

Signed-off-by: Werner Koch <wk@gnupg.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/tests/mpitests.c b/tests/mpitests.c
index 5643c1be..432f3e89 100644
--- a/tests/mpitests.c
+++ b/tests/mpitests.c
@@ -150,6 +150,38 @@ test_const_and_immutable (void)
 }
 
 
+static void
+test_opaque (void)
+{
+  gcry_mpi_t a;
+  char *p;
+  unsigned int nbits;
+
+  p = gcry_xstrdup ("This is a test buffer");
+  a = gcry_mpi_set_opaque (NULL, p, 21*8+1); /* (a non byte aligned length) */
+
+  if (!gcry_mpi_get_flag (a, GCRYMPI_FLAG_OPAQUE))
+    die ("opaque flag not set\n");
+
+  p = gcry_mpi_get_opaque (a, &nbits);
+  if (!p)
+    die ("gcry_mpi_get_opaque returned NULL\n");
+  if (nbits != 21*8+1)
+    die ("gcry_mpi_get_opaque returned a changed bit size\n");
+  if (strcmp (p, "This is a test buffer"))
+    die ("gcry_mpi_get_opaque returned a changed buffer\n");
+
+  if (verbose)
+    {
+      fprintf (stderr, "mpi: ");
+      gcry_mpi_dump (a);
+      putc ('\n', stderr);
+    }
+
+  gcry_mpi_release (a);
+}
+
+
 static int
 test_add (void)
 {
@@ -354,6 +386,7 @@ main (int argc, char* argv[])
   gcry_control(GCRYCTL_DISABLE_SECMEM);
 
   test_const_and_immutable ();
+  test_opaque ();
   test_add ();
   test_sub ();
   test_mul ();