[PATCH v1 4/4] test: dm: add AES engine test

[Svyatoslav Ryhel]

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

Signed-off-by: Svyatoslav Ryhel <clamor95 at gmail.com>
---
 arch/sandbox/dts/test.dts          |  4 +++
 configs/sandbox64_defconfig        |  2 ++
 configs/sandbox_defconfig          |  2 ++
 configs/sandbox_flattree_defconfig |  3 ++
 test/dm/Makefile                   |  1 +
 test/dm/aes.c                      | 57 ++++++++++++++++++++++++++++++
 6 files changed, 69 insertions(+)
 create mode 100644 test/dm/aes.c

diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 7026c73bc69..bb696c5ef7f 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -2150,6 +2150,10 @@
 			};
 		};
 	};
+
+	aes-engine {
+		compatible = "software-aes-engine";
+	};
 };
 
 #include "sandbox_pmic.dtsi"
diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig
index 34e89bf6b3e..8fdc581c205 100644
--- a/configs/sandbox64_defconfig
+++ b/configs/sandbox64_defconfig
@@ -137,6 +137,8 @@ CONFIG_CLK_K210=y
 CONFIG_CLK_K210_SET_RATE=y
 CONFIG_SANDBOX_CLK_CCF=y
 CONFIG_CPU=y
+CONFIG_DM_AES=y
+CONFIG_AES_SOFTWARE=y
 CONFIG_DM_DEMO=y
 CONFIG_DM_DEMO_SIMPLE=y
 CONFIG_DM_DEMO_SHAPE=y
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 4f6943d1a4b..602397430f0 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -186,6 +186,8 @@ CONFIG_CLK_K210_SET_RATE=y
 CONFIG_SANDBOX_CLK_CCF=y
 CONFIG_CLK_SCMI=y
 CONFIG_CPU=y
+CONFIG_DM_AES=y
+CONFIG_AES_SOFTWARE=y
 CONFIG_DM_DEMO=y
 CONFIG_DM_DEMO_SIMPLE=y
 CONFIG_DM_DEMO_SHAPE=y
diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
index 67c0ed7353e..317d7dc9c20 100644
--- a/configs/sandbox_flattree_defconfig
+++ b/configs/sandbox_flattree_defconfig
@@ -75,6 +75,7 @@ CONFIG_CMD_QFW=y
 CONFIG_CMD_BOOTSTAGE=y
 CONFIG_CMD_PMIC=y
 CONFIG_CMD_REGULATOR=y
+CONFIG_CMD_AES=y
 CONFIG_CMD_TPM=y
 CONFIG_CMD_TPM_TEST=y
 CONFIG_CMD_EXT4_WRITE=y
@@ -115,6 +116,8 @@ CONFIG_CLK_K210=y
 CONFIG_CLK_K210_SET_RATE=y
 CONFIG_SANDBOX_CLK_CCF=y
 CONFIG_CPU=y
+CONFIG_DM_AES=y
+CONFIG_AES_SOFTWARE=y
 CONFIG_DM_DEMO=y
 CONFIG_DM_DEMO_SIMPLE=y
 CONFIG_DM_DEMO_SHAPE=y
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 <clamor95 at gmail.com>
+ */
+
+#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);
-- 
2.48.1