test: dm: Add test for ECDSA UCLASS support

This test verifies that ECDSA_UCLASS is implemented, and that
ecdsa_verify() works as expected. The definition of "expected" is
"does not find a device, and returns -ENODEV".

The lack of a hardware-independent ECDSA implementation prevents us
from having one in the sandbox, for now.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>

2 files changed, 39 insertions, 0 deletions

diff --git a/test/dm/Makefile b/test/dm/Makefile
index d5c42e7643e..516f69d61cb 100644
--- a/test/dm/Makefile
+++ b/test/dm/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_DEVRES) += devres.o
 obj-$(CONFIG_DMA) += dma.o
 obj-$(CONFIG_VIDEO_MIPI_DSI) += dsi_host.o
 obj-$(CONFIG_DM_DSA) += dsa.o
+obj-$(CONFIG_ECDSA_VERIFY) += ecdsa.o
 obj-$(CONFIG_DM_ETH) += eth.o
 ifneq ($(CONFIG_EFI_PARTITION),)
 obj-$(CONFIG_FASTBOOT_FLASH_MMC) += fastboot.o
diff --git a/test/dm/ecdsa.c b/test/dm/ecdsa.c
new file mode 100644
index 00000000000..da535c98b59
--- /dev/null
+++ b/test/dm/ecdsa.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <crypto/ecdsa-uclass.h>
+#include <dm.h>
+#include <dm/test.h>
+#include <test/ut.h>
+#include <u-boot/ecdsa.h>
+
+/*
+ * Basic test of the ECDSA uclass and ecdsa_verify()
+ *
+ * ECDSA implementations in u-boot are hardware-dependent. Until we have a
+ * software implementation that can be compiled into the sandbox, all we can
+ * test is the uclass support.
+ *
+ * The uclass_get() test is redundant since ecdsa_verify() would also fail. We
+ * run both functions in order to isolate the cause more clearly. i.e. is
+ * ecdsa_verify() failing because the UCLASS is absent/broken?
+ */
+static int dm_test_ecdsa_verify(struct unit_test_state *uts)
+{
+	struct uclass *ucp;
+
+	struct checksum_algo algo = {
+		.checksum_len = 256,
+	};
+
+	struct image_sign_info info = {
+		.checksum = &algo,
+	};
+
+	ut_assertok(uclass_get(UCLASS_ECDSA, &ucp));
+	ut_assertnonnull(ucp);
+	ut_asserteq(-ENODEV, ecdsa_verify(&info, NULL, 0, NULL, 0));
+
+	return 0;
+}
+DM_TEST(dm_test_ecdsa_verify, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);