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/* SPDX-License-Identifier: GPL-2.0-only */
#include <cbfs.h>
#include <commonlib/region.h>
#include <string.h>
#include <tests/lib/cbfs_util.h>
#include <tests/test.h>
/* Mocks */
static struct cbfs_boot_device cbd;
const struct cbfs_boot_device *cbfs_get_boot_device(bool force_ro)
{
check_expected(force_ro);
return &cbd;
}
size_t vb2_digest_size(enum vb2_hash_algorithm hash_alg)
{
if (hash_alg != VB2_HASH_SHA256) {
fail_msg("Unsupported hash algorithm: %d\n", hash_alg);
return 0;
}
return VB2_SHA256_DIGEST_SIZE;
}
vb2_error_t vb2_hash_verify(const void *buf, uint32_t size, const struct vb2_hash *hash)
{
check_expected_ptr(buf);
check_expected(size);
assert_int_equal(hash->algo, VB2_HASH_SHA256);
if (!memcmp(hash->sha256, good_hash, sizeof(good_hash)))
return VB2_SUCCESS;
if (!memcmp(hash->sha256, bad_hash, sizeof(bad_hash)))
return VB2_ERROR_SHA_MISMATCH;
fail_msg("%s called with bad hash", __func__);
return VB2_ERROR_SHA_MISMATCH;
}
size_t ulzman(const void *src, size_t srcn, void *dst, size_t dstn)
{
fail_msg("Unexpected call to %s", __func__);
return 0;
}
size_t ulz4fn(const void *src, size_t srcn, void *dst, size_t dstn)
{
fail_msg("Unexpected call to %s", __func__);
return 0;
}
vb2_error_t vb2_digest_init(struct vb2_digest_context *dc, enum vb2_hash_algorithm hash_alg)
{
if (hash_alg != VB2_HASH_SHA256) {
fail_msg("Unsupported hash algorithm: %d\n", hash_alg);
return VB2_ERROR_SHA_INIT_ALGORITHM;
}
return VB2_SUCCESS;
}
vb2_error_t vb2_digest_extend(struct vb2_digest_context *dc, const uint8_t *buf, uint32_t size)
{
check_expected(buf);
check_expected(size);
return VB2_SUCCESS;
}
vb2_error_t vb2_digest_finalize(struct vb2_digest_context *dc, uint8_t *digest, uint32_t size)
{
memcpy(digest, mock_ptr_type(void *), size);
return VB2_SUCCESS;
}
/* Original function alias created by test framework. Used for call wrapping in mock below. */
cb_err_t __real_cbfs_lookup(cbfs_dev_t dev, const char *name, union cbfs_mdata *mdata_out,
size_t *data_offset_out, struct vb2_hash *metadata_hash);
cb_err_t cbfs_lookup(cbfs_dev_t dev, const char *name, union cbfs_mdata *mdata_out,
size_t *data_offset_out, struct vb2_hash *metadata_hash)
{
const cb_err_t err =
__real_cbfs_lookup(dev, name, mdata_out, data_offset_out, metadata_hash);
assert_int_equal(mock_type(cb_err_t), err);
return err;
}
/* Tests */
static int setup_test_cbfs(void **state)
{
memset(&cbd, 0, sizeof(cbd));
return 0;
}
static void test_cbfs_map_no_hash(void **state)
{
void *mapping = NULL;
assert_int_equal(0, rdev_chain_mem(&cbd.rdev, &file_no_hash, sizeof(file_no_hash)));
if (CONFIG(CBFS_VERIFICATION)) {
/* File with no hash. No hash causes hash mismatch by default,
so mapping will not be completed successfully. */
expect_value(cbfs_get_boot_device, force_ro, false);
will_return(cbfs_lookup, CB_SUCCESS);
mapping = cbfs_map(TEST_DATA_1_FILENAME, NULL);
assert_null(mapping);
} else {
expect_value(cbfs_get_boot_device, force_ro, false);
will_return(cbfs_lookup, CB_SUCCESS);
mapping = cbfs_map(TEST_DATA_1_FILENAME, NULL);
assert_ptr_equal(mapping, file_no_hash.attrs_and_data);
}
}
static void test_cbfs_map_valid_hash(void **state)
{
void *mapping = NULL;
assert_int_equal(0,
rdev_chain_mem(&cbd.rdev, &file_valid_hash, sizeof(file_valid_hash)));
if (CONFIG(CBFS_VERIFICATION)) {
expect_value(cbfs_get_boot_device, force_ro, false);
expect_value(vb2_hash_verify, buf,
&file_valid_hash.attrs_and_data[HASH_ATTR_SIZE]);
expect_value(vb2_hash_verify, size, TEST_DATA_1_SIZE);
will_return(cbfs_lookup, CB_SUCCESS);
mapping = cbfs_map(TEST_DATA_1_FILENAME, NULL);
assert_ptr_equal(mapping, &file_valid_hash.attrs_and_data[HASH_ATTR_SIZE]);
} else {
expect_value(cbfs_get_boot_device, force_ro, false);
will_return(cbfs_lookup, CB_SUCCESS);
mapping = cbfs_map(TEST_DATA_1_FILENAME, NULL);
assert_ptr_equal(mapping, &file_valid_hash.attrs_and_data[HASH_ATTR_SIZE]);
}
}
static void test_cbfs_map_invalid_hash(void **state)
{
void *mapping = NULL;
assert_int_equal(
0, rdev_chain_mem(&cbd.rdev, &file_broken_hash, sizeof(file_broken_hash)));
if (CONFIG(CBFS_VERIFICATION)) {
expect_value(cbfs_get_boot_device, force_ro, false);
expect_value(vb2_hash_verify, buf,
&file_broken_hash.attrs_and_data[HASH_ATTR_SIZE]);
expect_value(vb2_hash_verify, size, TEST_DATA_1_SIZE);
will_return(cbfs_lookup, CB_SUCCESS);
mapping = cbfs_map(TEST_DATA_1_FILENAME, NULL);
assert_null(mapping);
} else {
expect_value(cbfs_get_boot_device, force_ro, false);
will_return(cbfs_lookup, CB_SUCCESS);
mapping = cbfs_map(TEST_DATA_1_FILENAME, NULL);
assert_ptr_equal(mapping, &file_broken_hash.attrs_and_data[HASH_ATTR_SIZE]);
}
}
void test_init_boot_device_verify(void **state)
{
struct vb2_hash hash = {.algo = VB2_HASH_SHA256};
const uint8_t hash_value[VB2_SHA256_DIGEST_SIZE] = {0};
memset(&cbd, 0, sizeof(cbd));
assert_int_equal(0,
rdev_chain_mem(&cbd.rdev, &file_valid_hash, sizeof(file_valid_hash)));
if (CONFIG(CBFS_VERIFICATION)) {
expect_memory(vb2_digest_extend, buf, &file_valid_hash,
be32_to_cpu(file_valid_hash.header.offset));
expect_value(vb2_digest_extend, size,
be32_to_cpu(file_valid_hash.header.offset));
will_return(vb2_digest_finalize, hash_value);
}
assert_int_equal(CB_SUCCESS, cbfs_init_boot_device(&cbd, &hash));
}
int main(void)
{
const struct CMUnitTest tests[] = {
cmocka_unit_test_setup(test_cbfs_map_no_hash, setup_test_cbfs),
cmocka_unit_test_setup(test_cbfs_map_valid_hash, setup_test_cbfs),
cmocka_unit_test_setup(test_cbfs_map_invalid_hash, setup_test_cbfs),
cmocka_unit_test(test_init_boot_device_verify),
};
return cb_run_group_tests(tests, NULL, NULL);
}
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