test: dm: add AES engine test

Create a basic test suit for AES DM uclass that covers all available
operations.

Signed-off-by: Svyatoslav Ryhel <[email protected]>

2 files changed, 58 insertions, 0 deletions

diff --git a/test/dm/Makefile b/test/dm/Makefile
index 917dafe7d22..d15859eca30 100644
--- a/test/dm/Makefile
+++ b/test/dm/Makefile
@@ -29,6 +29,7 @@ obj-(CONFIG_DM_GPIO) += gpio.o
 obj-y += irq.o
 endif
 obj-$(CONFIG_ADC) += adc.o
+obj-$(CONFIG_AES_SOFTWARE) += aes.o
 obj-$(CONFIG_SOUND) += audio.o
 obj-$(CONFIG_AXI) += axi.o
 obj-$(CONFIG_BLK) += blk.o
diff --git a/test/dm/aes.c b/test/dm/aes.c
new file mode 100644
index 00000000000..702e4db2b35
--- /dev/null
+++ b/test/dm/aes.c
@@ -0,0 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Tests for the driver model AES API
+ *
+ * Copyright (c) 2025 Svyatoslav Ryhel <[email protected]>
+ */
+
+#include <dm.h>
+#include <dm/test.h>
+#include <uboot_aes.h>
+#include <test/test.h>
+#include <test/ut.h>
+
+#define AES128_KEYSIZE		128
+
+static int dm_test_aes(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+	u8 test_key[AES128_KEY_LENGTH] = { 0x63, 0x68, 0x69, 0x63, 0x6b, 0x65, 0x6e, 0x20,
+					   0x74, 0x65, 0x72, 0x69, 0x79, 0x61, 0x6b, 0x69 };
+	u8 test_iv[AES128_KEY_LENGTH] = { 0 };
+
+	u8 test_input[AES_BLOCK_LENGTH] = { 0x49, 0x20, 0x77, 0x6f, 0x75, 0x6c, 0x64, 0x20,
+					    0x6c, 0x69, 0x6b, 0x65, 0x20, 0x74, 0x68, 0x65 };
+	u8 exp_output[AES_BLOCK_LENGTH] = { 0x97, 0x68, 0x72, 0x68, 0xd6, 0xec, 0xcc, 0xc0,
+					    0xc0, 0x7b, 0x25, 0xe2, 0x5e, 0xcf, 0xe5, 0x84 };
+	u8 exp_cmac[AES_BLOCK_LENGTH] = { 0xfc, 0x89, 0x20, 0xc8, 0x46, 0x97, 0xb1, 0x3d,
+					  0x31, 0x2c, 0xc2, 0x49, 0x5c, 0x5a, 0x0b, 0x9f };
+	u8 test_output[AES_BLOCK_LENGTH];
+
+	ut_assertok(uclass_first_device_err(UCLASS_AES, &dev));
+
+	/* software AES exposes 2 key slots */
+	ut_asserteq(2, dm_aes_get_available_key_slots(dev));
+
+	ut_assertok(dm_aes_select_key_slot(dev, AES128_KEYSIZE, 0));
+	ut_assertok(dm_aes_set_key_for_key_slot(dev, AES128_KEYSIZE, test_key, 0));
+
+	ut_assertok(dm_aes_ecb_encrypt(dev, test_input, test_output, 1));
+	ut_assertok(memcmp(exp_output, test_output, 16));
+
+	ut_assertok(dm_aes_ecb_decrypt(dev, test_output, test_output, 1));
+	ut_assertok(memcmp(test_input, test_output, 16));
+
+	ut_assertok(dm_aes_cbc_encrypt(dev, test_iv, test_input, test_output, 1));
+	ut_assertok(memcmp(exp_output, test_output, 16));
+
+	ut_assertok(dm_aes_cbc_decrypt(dev, test_iv, test_output, test_output, 1));
+	ut_assertok(memcmp(test_input, test_output, 16));
+
+	ut_assertok(dm_aes_cmac(dev, test_input, test_output, 1));
+	ut_assertok(memcmp(exp_cmac, test_output, 16));
+
+	return 0;
+}
+
+DM_TEST(dm_test_aes, UTF_SCAN_FDT);