/* SPDX-License-Identifier: GPL-2.0-only */ #include <cbfs.h> #include <commonlib/bsd/cbfs_private.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(bool allow_hwcrypto, const void *buf, uint32_t size, const struct vb2_hash *hash) { assert_true(allow_hwcrypto); 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, bool allow_hwcrypto, enum vb2_hash_algorithm hash_alg, uint32_t data_size) { 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. */ enum cb_err __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); enum cb_err 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 enum cb_err err = __real_cbfs_lookup(dev, name, mdata_out, data_offset_out, metadata_hash); assert_int_equal(mock_type(enum cb_err), 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); }