libpayload: Implement new CBFS access API

This commit adds new CBFS API, which is based on the one available in
the main coreboot source tree. Libpayload implementation supports RO/RW
file lookups and file contents verification.

Change-Id: I00da0658dbac0cddf92ad55611def947932d23c7
Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59497
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

7 files changed, 1148 insertions, 0 deletions

diff --git a/payloads/libpayload/tests/Makefile.inc b/payloads/libpayload/tests/Makefile.inc
index 55c455cf40..e1c2a232d4 100644
--- a/payloads/libpayload/tests/Makefile.inc
+++ b/payloads/libpayload/tests/Makefile.inc
@@ -34,6 +34,7 @@ TEST_CFLAGS := -include include/kconfig.h -include include/compiler.h
 TEST_CFLAGS += -Iinclude -Iinclude/mock
 TEST_CFLAGS += -I$(coreboottop)/src/commonlib/bsd/include
 TEST_CFLAGS += -I$(dir $(TEST_KCONFIG_AUTOHEADER))
+TEST_CFLAGS += -I$(coreboottop)/3rdparty/vboot/firmware/include
 
 # Test specific includes
 TEST_CFLAGS += -I$(testsrc)/include
diff --git a/payloads/libpayload/tests/include/mocks/cbfs_util.h b/payloads/libpayload/tests/include/mocks/cbfs_util.h
new file mode 100644
index 0000000000..b0a1e79831
--- /dev/null
+++ b/payloads/libpayload/tests/include/mocks/cbfs_util.h
@@ -0,0 +1,114 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef MOCKS_CBFS_UTIL_H
+#define MOCKS_CBFS_UTIL_H
+
+#include <cbfs.h>
+#include <stddef.h>
+#include <tests/test.h>
+
+#define BE32(be32) EMPTY_WRAP(\
+	((be32) >> 24) & 0xff, ((be32) >> 16) & 0xff, \
+	((be32) >> 8) & 0xff, ((be32) >> 0) & 0xff)
+
+#define BE64(be64) EMPTY_WRAP( \
+	BE32(((be64) >> 32) & 0xFFFFFFFF), \
+	BE32(((be64) >> 0) & 0xFFFFFFFF))
+
+#define LE32(val32) EMPTY_WRAP(\
+	((val32) >> 0) & 0xff, ((val32) >> 8) & 0xff, \
+	((val32) >> 16) & 0xff, ((val32) >> 24) & 0xff)
+
+#define LE64(val64) EMPTY_WRAP( \
+	BE32(((val64) >> 0) & 0xFFFFFFFF), \
+	BE32(((val64) >> 32) & 0xFFFFFFFF))
+
+#define FILENAME_SIZE 16
+
+struct cbfs_test_file {
+	struct cbfs_file header;
+	u8 filename[FILENAME_SIZE];
+	u8 attrs_and_data[200];
+};
+
+#define TEST_MCACHE_SIZE (2 * MiB)
+
+#define HEADER_INITIALIZER(ftype, attr_len, file_len) { \
+	.magic = CBFS_FILE_MAGIC, \
+	.len = htobe32(file_len), \
+	.type = htobe32(ftype), \
+	.attributes_offset = \
+		htobe32(attr_len ? sizeof(struct cbfs_file) + FILENAME_SIZE : 0), \
+	.offset = htobe32(sizeof(struct cbfs_file) + FILENAME_SIZE + attr_len), \
+}
+
+#define HASH_ATTR_SIZE (offsetof(struct cbfs_file_attr_hash, hash.raw) + VB2_SHA256_DIGEST_SIZE)
+
+/* This macro basically does nothing but suppresses linter messages */
+#define EMPTY_WRAP(...) __VA_ARGS__
+
+#define TEST_DATA_1_FILENAME "test/data/1"
+#define TEST_DATA_1_SIZE sizeof((u8[]){TEST_DATA_1})
+#define TEST_DATA_1 EMPTY_WRAP( \
+	'!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/', \
+	'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?', '@', \
+	'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', \
+	'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', \
+	'[', '\\', ']', '^', '_', '`', \
+	'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', \
+	'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z')
+
+#define TEST_DATA_2_FILENAME "test/data/2"
+#define TEST_DATA_2_SIZE sizeof((u8[]){TEST_DATA_2})
+#define TEST_DATA_2 EMPTY_WRAP( \
+	0x9d, 0xa9, 0x91, 0xac, 0x5d, 0xb2, 0x70, 0x76, 0x37, 0x94, 0x94, 0xa8, 0x8b, 0x78, \
+	0xb9, 0xaa, 0x1a, 0x8e, 0x9a, 0x16, 0xbe, 0xdc, 0x29, 0x42, 0x46, 0x58, 0xd4, 0x37, \
+	0x94, 0xca, 0x05, 0xdb, 0x54, 0xfa, 0xd8, 0x6e, 0x54, 0xd8, 0x30, 0x46, 0x5d, 0x62, \
+	0xc2, 0xce, 0xd8, 0x74, 0x60, 0xaf, 0x83, 0x8f, 0xfa, 0x97, 0xdd, 0x6e, 0xcb, 0x60, \
+	0xfa, 0xed, 0x8b, 0x55, 0x9e, 0xc1, 0xc2, 0x18, 0x4f, 0xe2, 0x28, 0x7e, 0xd7, 0x2f, \
+	0xa2, 0x86, 0xfb, 0x4d, 0x3e, 0x00, 0x5a, 0xf7, 0xc2, 0xad, 0x0e, 0xa7, 0xa2, 0xf7, \
+	0x38, 0x66, 0xe6, 0x5c, 0x76, 0x98, 0x89, 0x63, 0xeb, 0xc5, 0xf5, 0xb7, 0xa7, 0x58, \
+	0xe0, 0xf0, 0x2e, 0x2f, 0xb0, 0x95, 0xb7, 0x43, 0x28, 0x19, 0x2d, 0xef, 0x1a, 0xb3, \
+	0x42, 0x31, 0x55, 0x0f, 0xbc, 0xcd, 0x01, 0xe5, 0x39, 0x18, 0x88, 0x83, 0xb2, 0xc5, \
+	0x4b, 0x3b, 0x38, 0xe7)
+
+#define TEST_DATA_INT_1_FILENAME "test-int-1"
+#define TEST_DATA_INT_1_SIZE 8
+#define TEST_DATA_INT_1 0xFEDCBA9876543210ULL
+
+#define TEST_DATA_INT_2_FILENAME "test-int-2"
+#define TEST_DATA_INT_2_SIZE 8
+#define TEST_DATA_INT_2 0x10FE32DC54A97698ULL
+
+#define TEST_DATA_INT_3_FILENAME "test-int-3"
+#define TEST_DATA_INT_3_SIZE 8
+#define TEST_DATA_INT_3 0xFA57F003B0036667ULL
+
+#define TEST_SHA256                                                                            \
+	EMPTY_WRAP(0xef, 0xc7, 0xb1, 0x0a, 0xbf, 0x54, 0x2f, 0xaa, 0x12, 0xa6, 0xeb, 0xf,      \
+		   0xff, 0xf4, 0x19, 0xc1, 0x63, 0xf4, 0x60, 0x50, 0xc5, 0xb0, 0xbe, 0x37,     \
+		   0x32, 0x11, 0x19, 0x63, 0x61, 0xe0, 0x53, 0xe0)
+
+#define INVALID_SHA256                                                                         \
+	EMPTY_WRAP('T', 'h', 'i', 's', ' ', 'i', 's', ' ', 'n', 'o', 't', ' ', 'a', ' ', 'v',  \
+		   'a', 'l', 'i', 'd', ' ', 'S', 'H', 'A', '2', '5', '6', '!', '!', '!', '!',  \
+		   '!', '!')
+
+extern const u8 test_data_1[TEST_DATA_1_SIZE];
+extern const u8 test_data_2[TEST_DATA_2_SIZE];
+extern const u8 test_data_int_1[TEST_DATA_INT_1_SIZE];
+extern const u8 test_data_int_2[TEST_DATA_INT_2_SIZE];
+extern const u8 test_data_int_3[TEST_DATA_INT_3_SIZE];
+
+extern const u8 good_hash[VB2_SHA256_DIGEST_SIZE];
+extern const u8 bad_hash[VB2_SHA256_DIGEST_SIZE];
+
+extern const struct cbfs_test_file file_no_hash;
+extern const struct cbfs_test_file file_valid_hash;
+extern const struct cbfs_test_file file_broken_hash;
+extern const struct cbfs_test_file test_file_1;
+extern const struct cbfs_test_file test_file_2;
+extern const struct cbfs_test_file test_file_int_1;
+extern const struct cbfs_test_file test_file_int_2;
+extern const struct cbfs_test_file test_file_int_3;
+
+#endif /* MOCKS_CBFS_UTIL_H */
diff --git a/payloads/libpayload/tests/libcbfs/Makefile.inc b/payloads/libpayload/tests/libcbfs/Makefile.inc
new file mode 100644
index 0000000000..ad4efedcba
--- /dev/null
+++ b/payloads/libpayload/tests/libcbfs/Makefile.inc
@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+tests-y += cbfs-lookup-no-fallback-test
+tests-y += cbfs-lookup-has-fallback-test
+tests-y += cbfs-verification-no-sha512-test
+tests-y += cbfs-verification-has-sha512-test
+tests-y += cbfs-no-verification-no-sha512-test
+tests-y += cbfs-no-verification-has-sha512-test
+
+
+cbfs-lookup-no-fallback-test-srcs += tests/libcbfs/cbfs-lookup-test.c
+cbfs-lookup-no-fallback-test-srcs += tests/mocks/cbfs_file_mock.c
+cbfs-lookup-no-fallback-test-config += CONFIG_LP_ENABLE_CBFS_FALLBACK=0
+cbfs-lookup-no-fallback-test-config += CONFIG_LP_LZ4=1
+cbfs-lookup-no-fallback-test-config += CONFIG_LP_LZMA=1
+
+$(call copy-test,cbfs-lookup-no-fallback-test,cbfs-lookup-has-fallback-test)
+cbfs-lookup-has-fallback-test-config += CONFIG_LP_ENABLE_CBFS_FALLBACK=1
+
+cbfs-verification-no-sha512-test-srcs += tests/libcbfs/cbfs-verification-test.c
+cbfs-verification-no-sha512-test-srcs += tests/mocks/cbfs_file_mock.c
+cbfs-verification-no-sha512-test-config += CONFIG_LP_CBFS_VERIFICATION=1
+cbfs-verification-no-sha512-test-config += VB2_SUPPORT_SHA512=0
+
+$(call copy-test,cbfs-verification-no-sha512-test,cbfs-verification-has-sha512-test)
+cbfs-verification-has-sha512-test-config += VB2_SUPPORT_SHA512=1
+
+$(call copy-test,cbfs-verification-no-sha512-test,cbfs-no-verification-no-sha512-test)
+cbfs-verification-has-sha512-test-config += CONFIG_LP_CBFS_VERIFICATION=0
+
+$(call copy-test,cbfs-verification-no-sha512-test,cbfs-no-verification-has-sha512-test)
+cbfs-verification-has-sha512-test-config += CONFIG_LP_CBFS_VERIFICATION=0
+cbfs-verification-has-sha512-test-config += VB2_SUPPORT_SHA512=1
diff --git a/payloads/libpayload/tests/libcbfs/cbfs-lookup-test.c b/payloads/libpayload/tests/libcbfs/cbfs-lookup-test.c
new file mode 100644
index 0000000000..0f7cdc7108
--- /dev/null
+++ b/payloads/libpayload/tests/libcbfs/cbfs-lookup-test.c
@@ -0,0 +1,642 @@
+/* SPDX-License-Identifier: GPL-2.0.-only */
+
+#include <libpayload-config.h>
+#include <cbfs.h>
+#include <cbfs_glue.h>
+#include <commonlib/bsd/cb_err.h>
+#include <commonlib/bsd/cbfs_mdata.h>
+#include <endian.h>
+#include <mocks/cbfs_util.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysinfo.h>
+#include <tests/test.h>
+
+#include "../libcbfs/cbfs.c"
+
+/* Mocks */
+
+unsigned long virtual_offset = 0;
+struct sysinfo_t lib_sysinfo;
+
+unsigned long ulzman(const unsigned char *src, unsigned long srcn, unsigned char *dst,
+		     unsigned long dstn)
+{
+	assert_true(dstn != 0);
+	check_expected(srcn);
+	check_expected(dstn);
+	memcpy(dst, src, dstn);
+	return dstn;
+}
+
+size_t ulz4fn(const void *src, size_t srcn, void *dst, size_t dstn)
+{
+	assert_non_null(dstn);
+	check_expected(srcn);
+	check_expected(dstn);
+	memcpy(dst, src, dstn);
+	return dstn;
+}
+
+static size_t test_fmap_offset = 0;
+static size_t test_fmap_size = 0;
+static cb_err_t test_fmap_result = CB_SUCCESS;
+
+static void set_fmap_locate_area_results(size_t offset, size_t size, size_t result)
+{
+	test_fmap_offset = offset;
+	test_fmap_size = size;
+	test_fmap_result = result;
+}
+
+cb_err_t fmap_locate_area(const char *name, size_t *offset, size_t *size)
+{
+	*offset = test_fmap_offset;
+	*size = test_fmap_size;
+	return test_fmap_result;
+}
+
+cb_err_t cbfs_mcache_lookup(const void *mcache, size_t mcache_size, const char *name,
+			    union cbfs_mdata *mdata_out, size_t *data_offset_out)
+{
+	assert_non_null(mcache);
+	assert_true(mcache_size > 0 && mcache_size % CBFS_MCACHE_ALIGNMENT == 0);
+	assert_non_null(mdata_out);
+	assert_non_null(data_offset_out);
+
+	check_expected(name);
+
+	cb_err_t ret = mock_type(cb_err_t);
+	if (ret != CB_SUCCESS)
+		return ret;
+
+	memcpy(mdata_out, mock_ptr_type(const union cbfs_mdata *), sizeof(union cbfs_mdata));
+	*data_offset_out = mock_type(size_t);
+	return CB_SUCCESS;
+}
+
+static void expect_cbfs_mcache_lookup(const char *name, cb_err_t err,
+				      const union cbfs_mdata *mdata, size_t data_offset_out)
+{
+	expect_string(cbfs_mcache_lookup, name, name);
+	will_return(cbfs_mcache_lookup, err);
+
+	if (err == CB_SUCCESS) {
+		will_return(cbfs_mcache_lookup, mdata);
+		will_return(cbfs_mcache_lookup, data_offset_out);
+	}
+}
+
+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)
+{
+	assert_non_null(dev);
+	check_expected(name);
+
+	cb_err_t ret = mock_type(cb_err_t);
+	if (ret != CB_SUCCESS)
+		return ret;
+
+	memcpy(mdata_out, mock_ptr_type(const union cbfS_mdata *), sizeof(union cbfs_mdata));
+	*data_offset_out = mock_type(size_t);
+	return CB_SUCCESS;
+}
+
+static void expect_cbfs_lookup(const char *name, cb_err_t err, const union cbfs_mdata *mdata,
+			       size_t data_offset_out)
+{
+	expect_string(cbfs_lookup, name, name);
+	will_return(cbfs_lookup, err);
+
+	if (err == CB_SUCCESS) {
+		will_return(cbfs_lookup, mdata);
+		will_return(cbfs_lookup, data_offset_out);
+	}
+}
+
+const void *cbfs_find_attr(const union cbfs_mdata *mdata, uint32_t attr_tag, size_t size_check)
+{
+	return mock_ptr_type(void *);
+}
+
+static bool force_single_boot_device_size_failure = false;
+
+ssize_t boot_device_read(void *buf, size_t offset, size_t size)
+{
+	memcpy(buf, (void *)offset, size);
+	if (force_single_boot_device_size_failure) {
+		force_single_boot_device_size_failure = false;
+		return CB_ERR;
+	}
+	return size;
+}
+
+/* Utils */
+
+static size_t get_cbfs_file_size(const void *file_ptr)
+{
+	const struct cbfs_file *f = file_ptr;
+	return be32toh(f->offset) + be32toh(f->len);
+}
+
+static void create_cbfs(const struct cbfs_test_file *files[], const size_t nfiles,
+			uint8_t *buffer, const size_t buffer_size)
+{
+	uint8_t *data_ptr = buffer;
+	size_t file_size = 0;
+	memset(buffer, 0, buffer_size);
+	for (size_t i = 0; i < nfiles; ++i) {
+		if (files[i] == NULL) {
+			file_size = CBFS_ALIGNMENT;
+			assert_true(&data_ptr[file_size] < &buffer[buffer_size]);
+		} else {
+			file_size = get_cbfs_file_size(files[i]);
+			assert_true(&data_ptr[file_size] < &buffer[buffer_size]);
+			memcpy(data_ptr, files[i], file_size);
+		}
+		data_ptr = &data_ptr[file_size];
+		data_ptr = &buffer[ALIGN_UP((uintptr_t)data_ptr - (uintptr_t)buffer,
+					    CBFS_ALIGNMENT)];
+	}
+}
+
+static size_t get_created_cbfs_file_start_offset(const struct cbfs_test_file *files[],
+						 const size_t nfile)
+{
+	size_t offset_out = 0;
+	size_t offset = 0;
+	for (size_t i = 0; i < nfile; ++i) {
+		offset = files[i] ? get_cbfs_file_size(files[i]) : CBFS_ALIGNMENT;
+		offset_out = ALIGN_UP(offset_out + offset, CBFS_ALIGNMENT);
+	}
+	return offset_out;
+}
+
+/* Setup */
+
+static uint8_t
+	aligned_cbfs_ro_buffer[(sizeof(struct cbfs_test_file) + CBFS_ALIGNMENT * 50)] __aligned(
+		CBFS_ALIGNMENT);
+static const size_t aligned_cbfs_ro_buffer_size = sizeof(aligned_cbfs_ro_buffer);
+static uint8_t
+	aligned_cbfs_rw_buffer[(sizeof(struct cbfs_test_file) + CBFS_ALIGNMENT * 50)] __aligned(
+		CBFS_ALIGNMENT);
+static const size_t aligned_cbfs_rw_buffer_size = sizeof(aligned_cbfs_rw_buffer);
+
+static uint8_t *unaligned_cbfs_ro_buffer = &aligned_cbfs_ro_buffer[5];
+static const size_t unaligned_cbfs_ro_buffer_size = aligned_cbfs_ro_buffer_size - 5;
+static uint8_t *unaligned_cbfs_rw_buffer = &aligned_cbfs_rw_buffer[5];
+static const size_t unaligned_cbfs_rw_buffer_size = aligned_cbfs_rw_buffer_size - 5;
+
+struct cbfs_test_state {
+	uint8_t *cbfs_ro_buf;
+	uint64_t cbfs_ro_size;
+	uint8_t *cbfs_rw_buf;
+	uint64_t cbfs_rw_size;
+
+	size_t mcache_ro_offset;
+	size_t mcache_ro_size;
+	size_t mcache_rw_offset;
+	size_t mcache_rw_size;
+
+	struct cbfs_test_setup {
+		bool unaligned;
+		bool init_ro;
+		bool init_rw;
+	} ex;
+};
+
+
+/* Because of how CMocka works, it should be called in the test function, or in the setup
+   function only if CBFS API capable of initializing RO CBFS boot device is called. */
+static void setup_cbfs_boot_device(struct cbfs_test_state *s)
+{
+	set_fmap_locate_area_results(0, 0, CB_SUCCESS);
+	lib_sysinfo.cbfs_ro_mcache_offset = 0;
+	lib_sysinfo.cbfs_ro_mcache_size = 0;
+	memset((void *)cbfs_get_boot_device(true), 0, sizeof(struct cbfs_boot_device));
+	if (s->ex.init_ro) {
+		set_fmap_locate_area_results((size_t)s->cbfs_ro_buf, s->cbfs_ro_size,
+					     CB_SUCCESS);
+		lib_sysinfo.cbfs_ro_mcache_offset = s->mcache_ro_offset;
+		lib_sysinfo.cbfs_ro_mcache_size = s->mcache_ro_size;
+	}
+
+	lib_sysinfo.cbfs_offset = 0;
+	lib_sysinfo.cbfs_size = 0;
+	lib_sysinfo.cbfs_rw_mcache_offset = 0;
+	lib_sysinfo.cbfs_rw_mcache_size = 0;
+	memset((void *)cbfs_get_boot_device(false), 0, sizeof(struct cbfs_boot_device));
+	if (s->ex.init_rw) {
+		lib_sysinfo.cbfs_offset = (uint64_t)s->cbfs_rw_buf;
+		lib_sysinfo.cbfs_size = s->cbfs_rw_size;
+		lib_sysinfo.cbfs_rw_mcache_offset = s->mcache_rw_offset;
+		lib_sysinfo.cbfs_rw_mcache_size = s->mcache_rw_size;
+	}
+}
+
+static int setup_cbfs_test(void **state)
+{
+	struct cbfs_test_state *s = calloc(1, sizeof(*s));
+
+	if (!s)
+		return 1;
+
+	if (*state)
+		memcpy(&s->ex, *state, sizeof(s->ex));
+
+	if (s->ex.init_ro) {
+		if (s->ex.unaligned) {
+			s->cbfs_ro_buf = unaligned_cbfs_ro_buffer;
+			s->cbfs_ro_size = unaligned_cbfs_ro_buffer_size;
+		} else {
+			s->cbfs_ro_buf = aligned_cbfs_ro_buffer;
+			s->cbfs_ro_size = aligned_cbfs_ro_buffer_size;
+		}
+	}
+
+	if (s->ex.init_rw) {
+		if (s->ex.unaligned) {
+			s->cbfs_rw_buf = unaligned_cbfs_rw_buffer;
+			s->cbfs_rw_size = unaligned_cbfs_rw_buffer_size;
+		} else {
+			s->cbfs_rw_buf = aligned_cbfs_rw_buffer;
+			s->cbfs_rw_size = aligned_cbfs_rw_buffer_size;
+		}
+	}
+
+	*state = s;
+
+	return 0;
+}
+
+static int teardown_cbfs_test(void **state)
+{
+	if (*state)
+		free(*state);
+
+	return 0;
+}
+
+/* Tests */
+
+static void test_cbfs_boot_device_init(void **state)
+{
+	const struct cbfs_boot_device *cbd = NULL;
+
+	/* No valid RO, should fail */
+	set_fmap_locate_area_results(0, 0, CB_ERR);
+	lib_sysinfo.cbfs_offset = 0;
+	lib_sysinfo.cbfs_size = 0;
+	lib_sysinfo.cbfs_rw_mcache_size = 0;
+	lib_sysinfo.cbfs_rw_mcache_offset = 0;
+	lib_sysinfo.cbfs_ro_mcache_offset = 0;
+	lib_sysinfo.cbfs_ro_mcache_size = 0;
+	assert_int_equal(NULL, cbfs_get_boot_device(true));
+	assert_null(cbfs_ro_map("file", NULL));
+
+	/* Valid RO */
+	set_fmap_locate_area_results(0x12345678, 0x90ABCDEF, CB_SUCCESS);
+	lib_sysinfo.cbfs_ro_mcache_offset = 0x600D41C3;
+	lib_sysinfo.cbfs_ro_mcache_size = 0xBADBEEFF;
+	cbd = cbfs_get_boot_device(true);
+	assert_non_null(cbd);
+	assert_int_equal(0x12345678, cbd->dev.offset);
+	assert_int_equal(0x90ABCDEF, cbd->dev.size);
+	assert_int_equal(0xBADBEEFF, cbd->mcache_size);
+	assert_int_equal(0x600D41C3, cbd->mcache);
+
+	lib_sysinfo.cbfs_offset = 0xAABBCCDD;
+	lib_sysinfo.cbfs_size = 0x1000;
+	lib_sysinfo.cbfs_rw_mcache_offset = 0x8F8F8F8F;
+	lib_sysinfo.cbfs_rw_mcache_size = 0x500;
+	cbd = cbfs_get_boot_device(false);
+	assert_non_null(cbd);
+	assert_int_equal(0xAABBCCDD, cbd->dev.offset);
+	assert_int_equal(0x1000, cbd->dev.size);
+	assert_int_equal(0x8F8F8F8F, cbd->mcache);
+	assert_int_equal(0x500, cbd->mcache_size);
+}
+
+/* This test checks cbfs_map() basic cases and covers only RW CBFS. */
+void test_cbfs_map(void **state)
+{
+	struct cbfs_test_state *s = *state;
+	void *mapping = NULL;
+	size_t size_out = 0;
+	const struct cbfs_test_file *cbfs_files[] = {
+		&test_file_int_1, &test_file_2, NULL, &test_file_int_3,
+		&test_file_int_2, NULL,		NULL, &test_file_1,
+	};
+	uint8_t *cbfs_buf = NULL;
+	size_t foffset = 0;
+
+	setup_cbfs_boot_device(s);
+	cbfs_buf = s->cbfs_rw_buf;
+	create_cbfs(cbfs_files, ARRAY_SIZE(cbfs_files), s->cbfs_rw_buf, s->cbfs_rw_size);
+
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 0);
+	expect_cbfs_lookup(TEST_DATA_INT_1_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&cbfs_buf[foffset],
+			   foffset + be32toh(test_file_int_1.header.offset));
+	will_return(cbfs_find_attr, NULL);
+	mapping = cbfs_map(TEST_DATA_INT_1_FILENAME, &size_out);
+	assert_non_null(mapping);
+	assert_int_equal(TEST_DATA_INT_1_SIZE, size_out);
+	assert_memory_equal(test_data_int_1, mapping, TEST_DATA_INT_1_SIZE);
+	cbfs_unmap(mapping);
+
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 1);
+	expect_cbfs_lookup(TEST_DATA_2_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&cbfs_buf[foffset],
+			   foffset + be32toh(test_file_2.header.offset));
+	will_return(cbfs_find_attr, &test_file_2.attrs_and_data);
+	expect_value(ulzman, srcn, TEST_DATA_2_SIZE);
+	expect_value(ulzman, dstn, TEST_DATA_2_SIZE);
+	mapping = cbfs_map(TEST_DATA_2_FILENAME, &size_out);
+	assert_non_null(mapping);
+	assert_int_equal(TEST_DATA_2_SIZE, size_out);
+	assert_memory_equal(test_data_2, mapping, TEST_DATA_2_SIZE);
+	cbfs_unmap(mapping);
+
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 3);
+	expect_cbfs_lookup(TEST_DATA_INT_3_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&cbfs_buf[foffset],
+			   foffset + be32toh(test_file_int_3.header.offset));
+	will_return(cbfs_find_attr, &test_file_int_3.attrs_and_data);
+	expect_value(ulz4fn, srcn, TEST_DATA_INT_3_SIZE);
+	expect_value(ulz4fn, dstn, TEST_DATA_INT_3_SIZE);
+	mapping = cbfs_map(TEST_DATA_INT_3_FILENAME, &size_out);
+	assert_non_null(mapping);
+	assert_int_equal(TEST_DATA_INT_3_SIZE, size_out);
+	assert_memory_equal(test_data_int_3, mapping, TEST_DATA_INT_3_SIZE);
+	cbfs_unmap(mapping);
+
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 4);
+	expect_cbfs_lookup(TEST_DATA_INT_2_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&cbfs_buf[foffset],
+			   foffset + be32toh(test_file_int_2.header.offset));
+	will_return(cbfs_find_attr, NULL);
+	mapping = cbfs_map(TEST_DATA_INT_2_FILENAME, &size_out);
+	assert_non_null(mapping);
+	assert_int_equal(TEST_DATA_INT_2_SIZE, size_out);
+	assert_memory_equal(test_data_int_2, mapping, TEST_DATA_INT_2_SIZE);
+	cbfs_unmap(mapping);
+
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 7);
+	expect_cbfs_lookup(TEST_DATA_1_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&cbfs_buf[foffset],
+			   foffset + be32toh(test_file_1.header.offset));
+	will_return(cbfs_find_attr, NULL);
+	mapping = cbfs_map(TEST_DATA_1_FILENAME, &size_out);
+	assert_non_null(mapping);
+	assert_int_equal(TEST_DATA_1_SIZE, size_out);
+	assert_memory_equal(test_data_1, mapping, TEST_DATA_1_SIZE);
+	cbfs_unmap(mapping);
+
+	size_out = 0;
+	expect_cbfs_lookup("invalid_file", CB_CBFS_NOT_FOUND, 0, 0);
+	if (s->ex.init_rw && CONFIG(LP_ENABLE_CBFS_FALLBACK))
+		expect_cbfs_lookup("invalid_file", CB_CBFS_NOT_FOUND, 0, 0);
+	mapping = cbfs_map("invalid_file", &size_out);
+	assert_null(mapping);
+}
+
+static void test_cbfs_invalid_compression_algo(void **state)
+{
+	struct cbfs_test_state *s = *state;
+	void *mapping = NULL;
+	size_t size_out = 0;
+	uint8_t *cbfs_buf = NULL;
+	struct cbfs_test_file *f;
+	struct cbfs_file_attr_compression *comp;
+	const struct cbfs_test_file *cbfs_files[] = {
+		&test_file_2,
+	};
+
+	setup_cbfs_boot_device(s);
+	cbfs_buf = s->cbfs_rw_buf;
+	create_cbfs(cbfs_files, ARRAY_SIZE(cbfs_files), s->cbfs_rw_buf, s->cbfs_rw_size);
+
+	f = (struct cbfs_test_file *)cbfs_buf;
+	comp = (struct cbfs_file_attr_compression *)&f->attrs_and_data[0];
+	comp->compression = 0xFFFFFFF0;
+
+	size_out = 0;
+	expect_cbfs_lookup(TEST_DATA_2_FILENAME, CB_SUCCESS, (const union cbfs_mdata *)cbfs_buf,
+			   be32toh(test_file_1.header.offset));
+	will_return(cbfs_find_attr, comp);
+	mapping = cbfs_map(TEST_DATA_2_FILENAME, &size_out);
+	assert_null(mapping);
+}
+
+static void test_cbfs_io_error(void **state)
+{
+	struct cbfs_test_state *s = *state;
+	setup_cbfs_boot_device(s);
+
+	expect_cbfs_lookup(TEST_DATA_1_FILENAME, CB_CBFS_IO, 0, 0);
+	assert_null(cbfs_map(TEST_DATA_1_FILENAME, NULL));
+}
+
+static void test_cbfs_successful_fallback_to_ro(void **state)
+{
+	struct cbfs_test_state *s = *state;
+	void *mapping = NULL;
+	size_t size_out = 0;
+	const struct cbfs_test_file *cbfs_files[] = {
+		&test_file_1,	  &test_file_2,	    &test_file_int_1,
+		&test_file_int_1, &test_file_int_2, &test_file_int_3,
+	};
+	uint8_t *cbfs_buf = NULL;
+	size_t foffset = 0;
+
+	if (!CONFIG(LP_ENABLE_CBFS_FALLBACK)) {
+		print_message("Skipping test, because LP_ENABLE_CBFS_FALLBACK == 0\n");
+		skip();
+	}
+
+	setup_cbfs_boot_device(s);
+	cbfs_buf = s->cbfs_ro_buf;
+	create_cbfs(cbfs_files, ARRAY_SIZE(cbfs_files), s->cbfs_ro_buf, s->cbfs_ro_size);
+	if (s->ex.init_rw)
+		create_cbfs(cbfs_files, ARRAY_SIZE(cbfs_files) - 2, s->cbfs_rw_buf,
+			    s->cbfs_rw_size);
+
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 1);
+	expect_cbfs_lookup(TEST_DATA_2_FILENAME, CB_CBFS_NOT_FOUND, 0, 0);
+	expect_cbfs_lookup(TEST_DATA_2_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&cbfs_buf[foffset],
+			   foffset + be32toh(test_file_2.header.offset));
+	will_return(cbfs_find_attr, &test_file_2.attrs_and_data);
+	expect_value(ulzman, srcn, TEST_DATA_2_SIZE);
+	expect_value(ulzman, dstn, TEST_DATA_2_SIZE);
+	mapping = cbfs_map(TEST_DATA_2_FILENAME, &size_out);
+	assert_non_null(mapping);
+	assert_int_equal(TEST_DATA_2_SIZE, size_out);
+	assert_memory_equal(test_data_2, mapping, TEST_DATA_2_SIZE);
+	cbfs_unmap(mapping);
+
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 5);
+	expect_cbfs_lookup(TEST_DATA_INT_3_FILENAME, CB_CBFS_NOT_FOUND, 0, 0);
+	expect_cbfs_lookup(TEST_DATA_INT_3_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&cbfs_buf[foffset],
+			   foffset + be32toh(test_file_int_3.header.offset));
+	will_return(cbfs_find_attr, &test_file_int_3.attrs_and_data);
+	expect_value(ulz4fn, srcn, TEST_DATA_INT_3_SIZE);
+	expect_value(ulz4fn, dstn, TEST_DATA_INT_3_SIZE);
+	mapping = cbfs_map(TEST_DATA_INT_3_FILENAME, &size_out);
+	assert_non_null(mapping);
+	assert_int_equal(TEST_DATA_INT_3_SIZE, size_out);
+	assert_memory_equal(test_data_int_3, mapping, TEST_DATA_INT_3_SIZE);
+	cbfs_unmap(mapping);
+}
+
+static void test_cbfs_load(void **state)
+{
+	struct cbfs_test_state *s = *state;
+	size_t size_out = 0;
+	const struct cbfs_test_file *cbfs_files[] = {
+		&test_file_int_1, &test_file_2, NULL, &test_file_int_3,
+		&test_file_int_2, NULL,		NULL, &test_file_1,
+	};
+	uint8_t *cbfs_buf = NULL;
+	uint8_t load_buf[1 * KiB];
+	size_t foffset = 0;
+
+	setup_cbfs_boot_device(s);
+	cbfs_buf = s->cbfs_rw_buf;
+	create_cbfs(cbfs_files, ARRAY_SIZE(cbfs_files), s->cbfs_rw_buf, s->cbfs_rw_size);
+
+	/* Successful load */
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 0);
+	expect_cbfs_lookup(TEST_DATA_INT_1_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&cbfs_buf[foffset],
+			   foffset + be32toh(test_file_int_1.header.offset));
+	will_return(cbfs_find_attr, NULL);
+	size_out = cbfs_load(TEST_DATA_INT_1_FILENAME, load_buf, sizeof(load_buf));
+	assert_int_equal(TEST_DATA_INT_1_SIZE, size_out);
+	assert_memory_equal(test_data_int_1, load_buf, TEST_DATA_INT_1_SIZE);
+
+	/* Buffer too small */
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 7);
+	expect_cbfs_lookup(TEST_DATA_1_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&cbfs_buf[foffset],
+			   foffset + be32toh(test_file_1.header.offset));
+	will_return(cbfs_find_attr, NULL);
+	size_out = cbfs_load(TEST_DATA_1_FILENAME, load_buf, TEST_DATA_1_SIZE / 2);
+	assert_int_equal(0, size_out);
+}
+
+static void test_cbfs_map_with_mcache(void **state)
+{
+	struct cbfs_test_state *s = *state;
+	void *mapping = NULL;
+	size_t size_out = 0;
+	const struct cbfs_test_file *cbfs_files[] = {
+		&test_file_int_2, &test_file_1,	    NULL,
+		&test_file_int_3, &test_file_int_1, &test_file_2,
+	};
+	uint8_t *cbfs_buf = NULL;
+	size_t foffset = 0;
+
+	/* Will not be accessed, just needs to be valid. */
+	s->mcache_ro_offset = ALIGN_UP(0x1000, CBFS_MCACHE_ALIGNMENT);
+	s->mcache_ro_size = ALIGN_UP(0x500, CBFS_MCACHE_ALIGNMENT);
+	s->mcache_rw_offset = ALIGN_UP(0x3000, CBFS_MCACHE_ALIGNMENT);
+	s->mcache_rw_size = ALIGN_UP(0x600, CBFS_MCACHE_ALIGNMENT);
+	setup_cbfs_boot_device(s);
+	cbfs_buf = s->cbfs_rw_buf;
+	create_cbfs(cbfs_files, ARRAY_SIZE(cbfs_files), s->cbfs_rw_buf, s->cbfs_rw_size);
+
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 4);
+	expect_cbfs_mcache_lookup(TEST_DATA_INT_1_FILENAME, CB_SUCCESS,
+				  (const union cbfs_mdata *)&cbfs_buf[foffset],
+				  foffset + be32toh(test_file_int_1.header.offset));
+	will_return(cbfs_find_attr, NULL);
+	mapping = cbfs_map(TEST_DATA_INT_1_FILENAME, &size_out);
+	assert_non_null(mapping);
+	assert_int_equal(TEST_DATA_INT_1_SIZE, size_out);
+	assert_memory_equal(test_data_int_1, mapping, TEST_DATA_INT_1_SIZE);
+	cbfs_unmap(mapping);
+}
+
+static void test_cbfs_boot_device_read_failure(void **state)
+{
+	struct cbfs_test_state *s = *state;
+	void *mapping = NULL;
+	size_t size_out = 0;
+	const struct cbfs_test_file *cbfs_files[] = {
+		&test_file_int_3, &test_file_1,	    NULL,
+		&test_file_int_3, &test_file_int_1, &test_file_2,
+	};
+	uint8_t *cbfs_buf = NULL;
+	size_t foffset = 0;
+
+	setup_cbfs_boot_device(s);
+	cbfs_buf = s->cbfs_rw_buf;
+	create_cbfs(cbfs_files, ARRAY_SIZE(cbfs_files), s->cbfs_rw_buf, s->cbfs_rw_size);
+
+	size_out = 0;
+	foffset = get_created_cbfs_file_start_offset(cbfs_files, 1);
+	expect_cbfs_lookup(TEST_DATA_1_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&cbfs_buf[foffset],
+			   foffset + be32toh(test_file_1.header.offset));
+	will_return(cbfs_find_attr, NULL);
+	force_single_boot_device_size_failure = true;
+	mapping = cbfs_map(TEST_DATA_1_FILENAME, &size_out);
+	assert_null(mapping);
+}
+
+
+#define TEST_CBFS_NAME_ALIGN_RO_RW(fn, test_name, enable_unaligned, enable_init_ro,            \
+				   enable_init_rw)                                             \
+	((struct CMUnitTest){                                                                  \
+		.name = (test_name),                                                           \
+		.test_func = (fn),                                                             \
+		.setup_func = setup_cbfs_test,                                                 \
+		.teardown_func = teardown_cbfs_test,                                           \
+		.initial_state =                                                               \
+			&(struct cbfs_test_setup){                                             \
+				.unaligned = enable_unaligned,                                 \
+				.init_ro = enable_init_ro,                                     \
+				.init_rw = enable_init_rw,                                     \
+			},                                                                     \
+	})
+
+#define TEST_CBFS_LOOKUP(fn)                                                                   \
+	EMPTY_WRAP(TEST_CBFS_NAME_ALIGN_RO_RW(fn, #fn ", RW, aligned", false, false, true),    \
+		   TEST_CBFS_NAME_ALIGN_RO_RW(fn, #fn ", RW, unaligned", true, false, true))
+
+#define TEST_CBFS_RO_FALLBACK(fn)                                                              \
+	EMPTY_WRAP(TEST_CBFS_NAME_ALIGN_RO_RW(fn, #fn ", RW+RO, aligned", false, true, true),  \
+		   TEST_CBFS_NAME_ALIGN_RO_RW(fn, #fn ", RW+RO, unaligned", true, true, true), \
+		   TEST_CBFS_NAME_ALIGN_RO_RW(fn, #fn ", RO, aligned", false, true, false),    \
+		   TEST_CBFS_NAME_ALIGN_RO_RW(fn, #fn ", RO, unaligned", true, true, false))
+
+
+int main(void)
+{
+	const struct CMUnitTest tests[] = {
+		cmocka_unit_test(test_cbfs_boot_device_init),
+		TEST_CBFS_LOOKUP(test_cbfs_map),
+		TEST_CBFS_LOOKUP(test_cbfs_invalid_compression_algo),
+		TEST_CBFS_LOOKUP(test_cbfs_io_error),
+		TEST_CBFS_RO_FALLBACK(test_cbfs_successful_fallback_to_ro),
+		TEST_CBFS_LOOKUP(test_cbfs_load),
+		TEST_CBFS_LOOKUP(test_cbfs_map_with_mcache),
+		TEST_CBFS_LOOKUP(test_cbfs_boot_device_read_failure),
+	};
+
+	return lp_run_group_tests(tests, NULL, NULL);
+}
diff --git a/payloads/libpayload/tests/libcbfs/cbfs-verification-test.c b/payloads/libpayload/tests/libcbfs/cbfs-verification-test.c
new file mode 100644
index 0000000000..2ab3d5302d
--- /dev/null
+++ b/payloads/libpayload/tests/libcbfs/cbfs-verification-test.c
@@ -0,0 +1,247 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <cbfs.h>
+#include <cbfs_glue.h>
+#include <string.h>
+#include <mocks/cbfs_util.h>
+#include <tests/test.h>
+
+#include "../libcbfs/cbfs.c"
+
+/* Mocks */
+
+unsigned long virtual_offset = 0;
+struct sysinfo_t lib_sysinfo;
+
+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;
+}
+
+unsigned long ulzman(const unsigned char *src, unsigned long srcn, unsigned char *dst,
+		     unsigned long 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;
+}
+
+cb_err_t cbfs_mcache_lookup(const void *mcache, size_t mcache_size, const char *name,
+			    union cbfs_mdata *mdata_out, size_t *data_offset_out)
+{
+	return CB_CBFS_CACHE_FULL;
+}
+
+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)
+{
+	assert_non_null(dev);
+	check_expected(name);
+
+	cb_err_t ret = mock_type(cb_err_t);
+	if (ret != CB_SUCCESS)
+		return ret;
+
+	memcpy(mdata_out, mock_ptr_type(const union cbfs_mdata *), sizeof(union cbfs_mdata));
+	*data_offset_out = mock_type(size_t);
+	return CB_SUCCESS;
+}
+
+static void expect_cbfs_lookup(const char *name, cb_err_t err, const union cbfs_mdata *mdata,
+			       size_t data_offset_out)
+{
+	expect_string(cbfs_lookup, name, name);
+	will_return(cbfs_lookup, err);
+
+	if (err == CB_SUCCESS) {
+		will_return(cbfs_lookup, mdata);
+		will_return(cbfs_lookup, data_offset_out);
+	}
+}
+
+const void *cbfs_find_attr(const union cbfs_mdata *mdata, uint32_t attr_tag, size_t size_check)
+{
+	return mock_ptr_type(void *);
+}
+
+cb_err_t fmap_locate_area(const char *name, size_t *offset, size_t *size)
+{
+	*offset = 0;
+	*size = 0;
+	return CB_SUCCESS;
+}
+
+ssize_t boot_device_read(void *buf, size_t offset, size_t size)
+{
+	/* Offset should be based on an address from lib_sysinfo.cbfs_offset */
+	memcpy(buf, (void *)offset, size);
+
+	return size;
+}
+
+const struct vb2_hash *cbfs_file_hash(const union cbfs_mdata *mdata)
+{
+	return mock_ptr_type(const struct vb2_hash *);
+}
+
+/* Utils */
+
+static void clear_cbfs_boot_devices(void)
+{
+	lib_sysinfo.cbfs_ro_mcache_offset = 0;
+	lib_sysinfo.cbfs_ro_mcache_size = 0;
+	lib_sysinfo.cbfs_offset = 0;
+	lib_sysinfo.cbfs_size = 0;
+	lib_sysinfo.cbfs_rw_mcache_offset = 0;
+	lib_sysinfo.cbfs_rw_mcache_size = 0;
+	memset((void *)cbfs_get_boot_device(true), 0, sizeof(struct cbfs_boot_device));
+	memset((void *)cbfs_get_boot_device(false), 0, sizeof(struct cbfs_boot_device));
+}
+
+void set_cbfs(uint64_t offset, size_t size)
+{
+	clear_cbfs_boot_devices();
+	lib_sysinfo.cbfs_offset = offset;
+	lib_sysinfo.cbfs_size = size;
+}
+
+/* Tests */
+
+static int setup_test_cbfs(void **state)
+{
+	clear_cbfs_boot_devices();
+	return 0;
+}
+
+static void test_cbfs_map_no_hash(void **state)
+{
+	void *mapping = NULL;
+	size_t size = 0;
+
+	set_cbfs((uint64_t)&file_no_hash, sizeof(file_no_hash));
+
+	expect_cbfs_lookup(TEST_DATA_1_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&file_no_hash,
+			   be32toh(file_no_hash.header.offset));
+	will_return(cbfs_find_attr, NULL);
+
+	if (CONFIG(LP_CBFS_VERIFICATION)) {
+		/* File with no hash. No hash causes hash mismatch by default,
+		   so mapping will not be completed successfully. */
+		will_return(cbfs_file_hash, NULL);
+		mapping = cbfs_map(TEST_DATA_1_FILENAME, NULL);
+		assert_null(mapping);
+	} else {
+		mapping = cbfs_map(TEST_DATA_1_FILENAME, &size);
+		assert_non_null(mapping);
+		assert_int_equal(TEST_DATA_1_SIZE, size);
+		assert_memory_equal(test_data_1, mapping, size);
+		cbfs_unmap(mapping);
+	}
+}
+
+static void test_cbfs_map_valid_hash(void **state)
+{
+	void *mapping = NULL;
+	size_t size = 0;
+	struct vb2_hash hash = {
+		.algo = VB2_HASH_SHA256,
+	};
+	memcpy(&hash.sha256, good_hash, VB2_SHA256_DIGEST_SIZE);
+
+	set_cbfs((uint64_t)&file_valid_hash, sizeof(file_valid_hash));
+
+	expect_cbfs_lookup(TEST_DATA_1_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&file_valid_hash,
+			   be32toh(file_valid_hash.header.offset));
+	will_return(cbfs_find_attr, NULL);
+
+
+	if (CONFIG(LP_CBFS_VERIFICATION)) {
+		will_return(cbfs_file_hash, &hash);
+		expect_memory(vb2_hash_verify, buf,
+			      &file_valid_hash.attrs_and_data[HASH_ATTR_SIZE], HASH_ATTR_SIZE);
+		expect_value(vb2_hash_verify, size, TEST_DATA_1_SIZE);
+		mapping = cbfs_map(TEST_DATA_1_FILENAME, &size);
+		assert_non_null(mapping);
+		assert_int_equal(TEST_DATA_1_SIZE, size);
+		assert_memory_equal(mapping, &file_valid_hash.attrs_and_data[HASH_ATTR_SIZE],
+				    size);
+	} else {
+		mapping = cbfs_map(TEST_DATA_1_FILENAME, &size);
+		assert_non_null(mapping);
+		assert_int_equal(TEST_DATA_1_SIZE, size);
+		assert_memory_equal(test_data_1, mapping, size);
+		cbfs_unmap(mapping);
+	}
+}
+
+static void test_cbfs_map_invalid_hash(void **state)
+{
+	void *mapping = NULL;
+	size_t size = 0;
+	struct vb2_hash hash = {
+		.algo = VB2_HASH_SHA256,
+	};
+	memcpy(&hash.sha256, bad_hash, VB2_SHA256_DIGEST_SIZE);
+
+	set_cbfs((uint64_t)&file_broken_hash, sizeof(file_broken_hash));
+
+	expect_cbfs_lookup(TEST_DATA_1_FILENAME, CB_SUCCESS,
+			   (const union cbfs_mdata *)&file_broken_hash,
+			   be32toh(file_broken_hash.header.offset));
+	will_return(cbfs_find_attr, NULL);
+
+	if (CONFIG(LP_CBFS_VERIFICATION)) {
+		will_return(cbfs_file_hash, &hash);
+		expect_memory(vb2_hash_verify, buf,
+			      &file_broken_hash.attrs_and_data[HASH_ATTR_SIZE], HASH_ATTR_SIZE);
+		expect_value(vb2_hash_verify, size, TEST_DATA_1_SIZE);
+		mapping = cbfs_map(TEST_DATA_1_FILENAME, NULL);
+		assert_null(mapping);
+	} else {
+		mapping = cbfs_map(TEST_DATA_1_FILENAME, &size);
+		assert_non_null(mapping);
+		assert_int_equal(TEST_DATA_1_SIZE, size);
+		assert_memory_equal(test_data_1, mapping, size);
+		cbfs_unmap(mapping);
+	}
+}
+
+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),
+	};
+
+	return lp_run_group_tests(tests, NULL, NULL);
+}
diff --git a/payloads/libpayload/tests/mocks/cbfs_file_mock.c b/payloads/libpayload/tests/mocks/cbfs_file_mock.c
new file mode 100644
index 0000000000..3ad078c7b0
--- /dev/null
+++ b/payloads/libpayload/tests/mocks/cbfs_file_mock.c
@@ -0,0 +1,95 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <mocks/cbfs_util.h>
+
+
+const u8 test_data_1[TEST_DATA_1_SIZE] = { TEST_DATA_1 };
+const u8 test_data_2[TEST_DATA_2_SIZE] = { TEST_DATA_2 };
+const u8 test_data_int_1[TEST_DATA_INT_1_SIZE] = { LE64(TEST_DATA_INT_1) };
+const u8 test_data_int_2[TEST_DATA_INT_2_SIZE] = { LE64(TEST_DATA_INT_2) };
+const u8 test_data_int_3[TEST_DATA_INT_3_SIZE] = { LE64(TEST_DATA_INT_3) };
+
+const u8 good_hash[VB2_SHA256_DIGEST_SIZE] = { TEST_SHA256 };
+const u8 bad_hash[VB2_SHA256_DIGEST_SIZE] = { INVALID_SHA256 };
+
+const struct cbfs_test_file file_no_hash = {
+	.header = HEADER_INITIALIZER(CBFS_TYPE_RAW, 0, TEST_DATA_1_SIZE),
+	.filename = TEST_DATA_1_FILENAME,
+	.attrs_and_data = {
+		TEST_DATA_1,
+	},
+};
+
+const struct cbfs_test_file file_valid_hash = {
+	.header = HEADER_INITIALIZER(CBFS_TYPE_RAW, HASH_ATTR_SIZE, TEST_DATA_1_SIZE),
+	.filename = TEST_DATA_1_FILENAME,
+	.attrs_and_data = {
+		BE32(CBFS_FILE_ATTR_TAG_HASH),
+		BE32(HASH_ATTR_SIZE),
+		BE32(VB2_HASH_SHA256),
+		TEST_SHA256,
+		TEST_DATA_1,
+	},
+};
+
+const struct cbfs_test_file file_broken_hash = {
+	.header = HEADER_INITIALIZER(CBFS_TYPE_RAW, HASH_ATTR_SIZE, TEST_DATA_1_SIZE),
+	.filename = TEST_DATA_1_FILENAME,
+	.attrs_and_data = {
+		BE32(CBFS_FILE_ATTR_TAG_HASH),
+		BE32(HASH_ATTR_SIZE),
+		BE32(VB2_HASH_SHA256),
+		INVALID_SHA256,
+		TEST_DATA_1,
+	},
+};
+
+const struct cbfs_test_file test_file_1 = {
+	.header = HEADER_INITIALIZER(CBFS_TYPE_RAW, 0, TEST_DATA_1_SIZE),
+	.filename = TEST_DATA_1_FILENAME,
+	.attrs_and_data = {
+		TEST_DATA_1,
+	},
+};
+
+const struct cbfs_test_file test_file_2 = {
+	.header = HEADER_INITIALIZER(CBFS_TYPE_RAW, sizeof(struct cbfs_file_attr_compression),
+				     TEST_DATA_2_SIZE),
+	.filename = TEST_DATA_2_FILENAME,
+	.attrs_and_data = {
+		BE32(CBFS_FILE_ATTR_TAG_COMPRESSION),
+		BE32(sizeof(struct cbfs_file_attr_compression)),
+		BE32(CBFS_COMPRESS_LZMA),
+		BE32(TEST_DATA_2_SIZE),
+		TEST_DATA_2,
+	},
+};
+
+const struct cbfs_test_file test_file_int_1 = {
+	.header = HEADER_INITIALIZER(CBFS_TYPE_RAW, 0, TEST_DATA_INT_1_SIZE),
+	.filename = TEST_DATA_INT_1_FILENAME,
+	.attrs_and_data = {
+		LE64(TEST_DATA_INT_1),
+	},
+};
+
+const struct cbfs_test_file test_file_int_2 = {
+	.header = HEADER_INITIALIZER(CBFS_TYPE_RAW, 0, TEST_DATA_INT_2_SIZE),
+	.filename = TEST_DATA_INT_2_FILENAME,
+	.attrs_and_data = {
+		LE64(TEST_DATA_INT_2),
+	},
+};
+
+const struct cbfs_test_file test_file_int_3 = {
+	.header = HEADER_INITIALIZER(CBFS_TYPE_RAW, sizeof(struct cbfs_file_attr_compression),
+				     TEST_DATA_INT_3_SIZE),
+	.filename = TEST_DATA_INT_3_FILENAME,
+	.attrs_and_data = {
+		BE32(CBFS_FILE_ATTR_TAG_COMPRESSION),
+		BE32(sizeof(struct cbfs_file_attr_compression)),
+		BE32(CBFS_COMPRESS_LZ4),
+		BE32(TEST_DATA_INT_3_SIZE),
+		LE64(TEST_DATA_INT_3),
+	},
+};
diff --git a/payloads/libpayload/tests/mocks/die.c b/payloads/libpayload/tests/mocks/die.c
new file mode 100644
index 0000000000..a67105a12b
--- /dev/null
+++ b/payloads/libpayload/tests/mocks/die.c
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <tests/test.h>
+#include <stdbool.h>
+
+void die_work(const char *file, const char *func, int line, const char *fmt, ...)
+{
+	/* Failing asserts are jumping to the user code (test) if expect_assert_failed() was
+	   previously called. Otherwise it jumps to the cmocka code and fails the test. */
+	mock_assert(false, "Mock assetion called", file, line);
+
+	/* Should never be reached */
+	print_error("%s() called...\n", __func__);
+	while (1)
+		;
+}