aes: add test unit for aes128
This commit add test unit for aes128.
Signed-off-by: Philippe Reynes <philippe.reynes@softathome.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/test/lib/test_aes.c b/test/lib/test_aes.c
new file mode 100644
index 0000000..2b0e894
--- /dev/null
+++ b/test/lib/test_aes.c
@@ -0,0 +1,162 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2019 Philippe Reynes <philippe.reynes@softathome.com>
+ *
+ * Unit tests for aes functions
+ */
+
+#include <common.h>
+#include <command.h>
+#include <hexdump.h>
+#include <uboot_aes.h>
+#include <test/lib.h>
+#include <test/test.h>
+#include <test/ut.h>
+
+#define TEST_AES_ONE_BLOCK 0
+#define TEST_AES_CBC_CHAIN 1
+
+struct test_aes_s {
+ int key_len;
+ int key_exp_len;
+ int type;
+ int num_block;
+};
+
+static struct test_aes_s test_aes[] = {
+ { AES128_KEY_LENGTH, AES128_EXPAND_KEY_LENGTH, TEST_AES_ONE_BLOCK, 1 },
+ { AES128_KEY_LENGTH, AES128_EXPAND_KEY_LENGTH, TEST_AES_CBC_CHAIN, 16 },
+};
+
+static void rand_buf(u8 *buf, int size)
+{
+ int i;
+
+ for (i = 0; i < size; i++)
+ buf[i] = rand() & 0xff;
+}
+
+static int lib_test_aes_one_block(struct unit_test_state *uts, int key_len,
+ u8 *key_exp, u8 *iv, int num_block,
+ u8 *nocipher, u8 *ciphered, u8 *uncipher)
+{
+ aes_encrypt(key_len, nocipher, key_exp, ciphered);
+ aes_decrypt(key_len, ciphered, key_exp, uncipher);
+
+ ut_asserteq_mem(nocipher, uncipher, AES_BLOCK_LENGTH);
+
+ /* corrupt the expanded key */
+ key_exp[0]++;
+ aes_decrypt(key_len, ciphered, key_exp, uncipher);
+ ut_assertf(memcmp(nocipher, uncipher, AES_BLOCK_LENGTH),
+ "nocipher and uncipher should be different\n");
+
+ return 0;
+}
+
+static int lib_test_aes_cbc_chain(struct unit_test_state *uts, int key_len,
+ u8 *key_exp, u8 *iv, int num_block,
+ u8 *nocipher, u8 *ciphered, u8 *uncipher)
+{
+ aes_cbc_encrypt_blocks(key_len, key_exp, iv,
+ nocipher, ciphered, num_block);
+ aes_cbc_decrypt_blocks(key_len, key_exp, iv,
+ ciphered, uncipher, num_block);
+
+ ut_asserteq_mem(nocipher, uncipher, num_block * AES_BLOCK_LENGTH);
+
+ /* corrupt the expanded key */
+ key_exp[0]++;
+ aes_cbc_decrypt_blocks(key_len, key_exp, iv,
+ ciphered, uncipher, num_block);
+ ut_assertf(memcmp(nocipher, uncipher, num_block * AES_BLOCK_LENGTH),
+ "nocipher and uncipher should be different\n");
+
+ return 0;
+}
+
+static int _lib_test_aes_run(struct unit_test_state *uts, int key_len,
+ int key_exp_len, int type, int num_block)
+{
+ u8 *key, *key_exp, *iv;
+ u8 *nocipher, *ciphered, *uncipher;
+ int ret;
+
+ /* Allocate all the buffer */
+ key = malloc(key_len);
+ ut_assertnonnull(key);
+ key_exp = malloc(key_exp_len);
+ ut_assertnonnull(key_exp);
+ iv = malloc(AES_BLOCK_LENGTH);
+ ut_assertnonnull(iv);
+ nocipher = malloc(num_block * AES_BLOCK_LENGTH);
+ ut_assertnonnull(nocipher);
+ ciphered = malloc((num_block + 1) * AES_BLOCK_LENGTH);
+ ut_assertnonnull(ciphered);
+ uncipher = malloc((num_block + 1) * AES_BLOCK_LENGTH);
+ ut_assertnonnull(uncipher);
+
+ /* Initialize all buffer */
+ rand_buf(key, key_len);
+ rand_buf(iv, AES_BLOCK_LENGTH);
+ rand_buf(nocipher, num_block * AES_BLOCK_LENGTH);
+ memset(ciphered, 0, (num_block + 1) * AES_BLOCK_LENGTH);
+ memset(uncipher, 0, (num_block + 1) * AES_BLOCK_LENGTH);
+
+ /* Expand the key */
+ aes_expand_key(key, key_len, key_exp);
+
+ /* Encrypt and decrypt */
+ switch (type) {
+ case TEST_AES_ONE_BLOCK:
+ ret = lib_test_aes_one_block(uts, key_len, key_exp, iv,
+ num_block, nocipher,
+ ciphered, uncipher);
+ break;
+ case TEST_AES_CBC_CHAIN:
+ ret = lib_test_aes_cbc_chain(uts, key_len, key_exp, iv,
+ num_block, nocipher,
+ ciphered, uncipher);
+ break;
+ default:
+ printf("%s: unknown type (type=%d)\n", __func__, type);
+ ret = -1;
+ };
+
+ /* Free all the data */
+ free(key);
+ free(key_exp);
+ free(iv);
+ free(nocipher);
+ free(ciphered);
+ free(uncipher);
+
+ return ret;
+}
+
+static int lib_test_aes_run(struct unit_test_state *uts,
+ struct test_aes_s *test)
+{
+ int key_len = test->key_len;
+ int key_exp_len = test->key_exp_len;
+ int type = test->type;
+ int num_block = test->num_block;
+
+ return _lib_test_aes_run(uts, key_len, key_exp_len,
+ type, num_block);
+}
+
+static int lib_test_aes(struct unit_test_state *uts)
+{
+ int i, ret = 0;
+
+ for (i = 0; i < ARRAY_SIZE(test_aes); i++) {
+ ret = lib_test_aes_run(uts, &test_aes[i]);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+LIB_TEST(lib_test_aes, 0);