This case can be triggered by encrypting in FIPS mode, where the default

algorithm is unsupported and gpg crashes in response.

diff --git a/lib/crypto.c b/lib/crypto.c

index 06eb482..905d583 100644

--- a/lib/crypto.c

+++ b/lib/crypto.c

@@ -709,6 +709,12 @@ encrypt_with_passphrase (size_t *res_size, const void *data, size_t size,

     }

   gpgme_data_release (src_data);

   gpgme_res = gpgme_data_release_and_get_mem (dest_data, res_size);

+  if (gpgme_res == NULL)

+    {

+      g_set_error (error, LIBVK_ERROR, LIBVK_ERROR_CRYPTO,

+		   _("Unknown error getting encryption result"));

+      goto err_ctx;

+    }

   res = g_memdup (gpgme_res, *res_size);

   gpgme_free (gpgme_res);

@@ -759,6 +765,12 @@ decrypt_with_passphrase (size_t *res_size, const void *data, size_t size,

     }

   gpgme_data_release (src_data);

   gpgme_res = gpgme_data_release_and_get_mem (dest_data, res_size);

+  if (gpgme_res == NULL)

+    {

+      g_set_error (error, LIBVK_ERROR, LIBVK_ERROR_CRYPTO,

+		   _("Unknown error getting decryption result"));

+      goto err_ctx;

+    }

   res = g_memdup (gpgme_res, *res_size);

   gpgme_free (gpgme_res);