This commit add test unit for aes128.
Signed-off-by: Philippe Reynes philippe.reynes@softathome.com --- test/lib/Makefile | 1 + test/lib/test_aes.c | 162 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 163 insertions(+) create mode 100644 test/lib/test_aes.c
Changelog: v4: - Put test/ headers at the end (feedback from Simon) v3: - new patch in this serie (in the previous version, the test to aes was added to pytest, now, we add test unit for aes as proposed by Simon)
diff --git a/test/lib/Makefile b/test/lib/Makefile index 72d2ec7..230068d 100644 --- a/test/lib/Makefile +++ b/test/lib/Makefile @@ -8,3 +8,4 @@ obj-y += lmb.o obj-y += string.o obj-$(CONFIG_ERRNO_STR) += test_errno_str.o obj-$(CONFIG_UT_LIB_ASN1) += asn1.o +obj-$(CONFIG_AES) += test_aes.o 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);