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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>
This commit is contained in:
Jakub Czapiga 2021-11-15 08:36:07 +00:00 committed by Felix Held
parent 1fa3da4d9b
commit 63e54275f6
18 changed files with 1815 additions and 437 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
payloads/libpayload/Kconfig
View File

@ -208,11 +208,7 @@ config PDCURSES
endchoice
config CBFS
bool "CBFS support"
default y
help
CBFS is the archive format of coreboot
source "libcbfs/Kconfig"
config LZMA
bool "LZMA decoder"

1
payloads/libpayload/Makefile.inc
View File

@ -62,6 +62,7 @@ subdirs-$(CONFIG_LP_VBOOT_LIB) += vboot
INCLUDES := -Iinclude -Iinclude/$(ARCHDIR-y) -I$(obj)
INCLUDES += -include include/kconfig.h -include include/compiler.h
INCLUDES += -I$(coreboottop)/src/commonlib/bsd/include
INCLUDES += -I$(coreboottop)/3rdparty/vboot/firmware/include
CFLAGS += $(INCLUDES) -Os -pipe -nostdinc -ggdb3
CFLAGS += -nostdlib -fno-builtin -ffreestanding -fomit-frame-pointer

180
payloads/libpayload/include/cbfs.h
View File

@ -1,82 +1,124 @@
/*
*
* Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
* Copyright (C) 2013 Google, Inc.
*
* This file is dual-licensed. You can choose between:
* - The GNU GPL, version 2, as published by the Free Software Foundation
* - The revised BSD license (without advertising clause)
*
* ---------------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* ---------------------------------------------------------------------------
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ---------------------------------------------------------------------------
*/
/* SPDX-License-Identifier: BSD-3-Clause */
#ifndef _CBFS_H_
#define _CBFS_H_
#include <cbfs_core.h>
#include <commonlib/bsd/cb_err.h>
#include <commonlib/bsd/cbfs_mdata.h>
#include <endian.h>
#include <stdbool.h>
/* legacy APIs */
const struct cbfs_header *get_cbfs_header(void);
struct cbfs_file *cbfs_find(const char *name);
void *cbfs_find_file(const char *name, int type);
int cbfs_execute_stage(struct cbfs_media *media, const char *name);
void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
uint16_t device);
void *cbfs_load_payload(struct cbfs_media *media, const char *name);
void *cbfs_load_stage(struct cbfs_media *media, const char *name);
/**********************************************************************************************
* CBFS FILE ACCESS APIs *
**********************************************************************************************/
/* Simple buffer for streaming media. */
struct cbfs_simple_buffer {
char *buffer;
size_t allocated;
size_t size;
size_t last_allocate;
};
/* For documentation look in src/include/cbfs.h file in the main coreboot source tree. */
void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer,
struct cbfs_media *media,
size_t offset, size_t count);
static inline size_t cbfs_load(const char *name, void *buf, size_t size);
static inline size_t cbfs_ro_load(const char *name, void *buf, size_t size);
void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer,
const void *address);
static inline void *cbfs_map(const char *name, size_t *size_out);
static inline void *cbfs_ro_map(const char *name, size_t *size_out);
// Utility functions
int run_address(void *f);
void cbfs_unmap(void *mapping);
/* Defined in individual arch / board implementation. */
int init_default_cbfs_media(struct cbfs_media *media);
static inline size_t cbfs_get_size(const char *name);
static inline size_t cbfs_ro_get_size(const char *name);
static inline enum cbfs_type cbfs_get_type(const char *name);
static inline enum cbfs_type cbfs_ro_get_type(const char *name);
static inline bool cbfs_file_exists(const char *name);
static inline bool cbfs_ro_file_exists(const char *name);
/**********************************************************************************************
* INTERNAL HELPERS FOR INLINES, DO NOT USE. *
**********************************************************************************************/
ssize_t _cbfs_boot_lookup(const char *name, bool force_ro, union cbfs_mdata *mdata);
void *_cbfs_load(const char *name, void *buf, size_t *size_inout, bool force_ro);
/**********************************************************************************************
* INLINE IMPLEMENTATIONS *
**********************************************************************************************/
static inline void *cbfs_map(const char *name, size_t *size_out)
{
return _cbfs_load(name, NULL, size_out, false);
}
static inline void *cbfs_ro_map(const char *name, size_t *size_out)
{
return _cbfs_load(name, NULL, size_out, true);
}
static inline size_t cbfs_load(const char *name, void *buf, size_t size)
{
if (_cbfs_load(name, buf, &size, false))
return size;
else
return 0;
}
static inline size_t cbfs_ro_load(const char *name, void *buf, size_t size)
{
if (_cbfs_load(name, buf, &size, true))
return size;
else
return 0;
}
static inline size_t cbfs_get_size(const char *name)
{
union cbfs_mdata mdata;
if (_cbfs_boot_lookup(name, false, &mdata) < 0)
return 0;
else
return be32toh(mdata.h.len);
}
static inline size_t cbfs_ro_get_size(const char *name)
{
union cbfs_mdata mdata;
if (_cbfs_boot_lookup(name, true, &mdata) < 0)
return 0;
else
return be32toh(mdata.h.len);
}
static inline enum cbfs_type cbfs_get_type(const char *name)
{
union cbfs_mdata mdata;
if (_cbfs_boot_lookup(name, false, &mdata) < 0)
return CBFS_TYPE_NULL;
else
return be32toh(mdata.h.type);
}
static inline enum cbfs_type cbfs_ro_get_type(const char *name)
{
union cbfs_mdata mdata;
if (_cbfs_boot_lookup(name, true, &mdata) < 0)
return CBFS_TYPE_NULL;
else
return be32toh(mdata.h.type);
}
static inline bool cbfs_file_exists(const char *name)
{
union cbfs_mdata mdata;
return _cbfs_boot_lookup(name, false, &mdata) >= 0;
}
static inline bool cbfs_ro_file_exists(const char *name)
{
union cbfs_mdata mdata;
return _cbfs_boot_lookup(name, true, &mdata) >= 0;
}
/* Legacy API. Designated for removal in the future. */
#include <cbfs_legacy.h>
#endif

154
payloads/libpayload/include/cbfs_core.h
View File

@ -45,139 +45,14 @@
#ifndef _CBFS_CORE_H_
#define _CBFS_CORE_H_
#include <commonlib/bsd/cbfs_serialized.h>
#include <endian.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
/** These are standard values for the known compression
alogrithms that coreboot knows about for stages and
payloads. Of course, other CBFS users can use whatever
values they want, as long as they understand them. */
#define CBFS_COMPRESS_NONE 0
#define CBFS_COMPRESS_LZMA 1
#define CBFS_COMPRESS_LZ4 2
/** These are standard component types for well known
components (i.e - those that coreboot needs to consume.
Users are welcome to use any other value for their
components */
#define CBFS_TYPE_STAGE 0x10
#define CBFS_TYPE_SELF 0x20
#define CBFS_TYPE_FIT 0x21
#define CBFS_TYPE_OPTIONROM 0x30
#define CBFS_TYPE_BOOTSPLASH 0x40
#define CBFS_TYPE_RAW 0x50
#define CBFS_TYPE_VSA 0x51
#define CBFS_TYPE_MBI 0x52
#define CBFS_TYPE_MICROCODE 0x53
#define CBFS_TYPE_STRUCT 0x70
#define CBFS_COMPONENT_CMOS_DEFAULT 0xaa
#define CBFS_COMPONENT_CMOS_LAYOUT 0x01aa
#define CBFS_HEADER_MAGIC 0x4F524243
#define CBFS_HEADER_VERSION1 0x31313131
#define CBFS_HEADER_VERSION2 0x31313132
#define CBFS_HEADER_VERSION CBFS_HEADER_VERSION2
#define CBFS_HEADER_INVALID_ADDRESS ((void*)(0xffffffff))
/* this is the master cbfs header - it must be located somewhere available
* to bootblock (to load romstage). The last 4 bytes in the image contain its
* relative offset from the end of the image (as a 32-bit signed integer). */
struct cbfs_header {
uint32_t magic;
uint32_t version;
uint32_t romsize;
uint32_t bootblocksize;
uint32_t align; /* fixed to 64 bytes */
uint32_t offset;
uint32_t architecture;
uint32_t pad[1];
} __packed;
/* this used to be flexible, but wasn't ever set to something different. */
#define CBFS_ALIGNMENT 64
/* "Unknown" refers to CBFS headers version 1,
* before the architecture was defined (i.e., x86 only).
*/
#define CBFS_ARCHITECTURE_UNKNOWN 0xFFFFFFFF
#define CBFS_ARCHITECTURE_X86 0x00000001
#define CBFS_ARCHITECTURE_ARM 0x00000010
#define CBFS_ARCHITECTURE_ARM64 0x00000011
/** This is a component header - every entry in the CBFS
will have this header.
This is how the component is arranged in the ROM:
-------------- <- 0
component header
-------------- <- sizeof(struct component)
component name
-------------- <- offset
data
...
-------------- <- offset + len
*/
#define CBFS_FILE_MAGIC "LARCHIVE"
struct cbfs_file {
char magic[8];
uint32_t len;
uint32_t type;
uint32_t attributes_offset;
uint32_t offset;
char filename[];
} __packed;
/* Depending on how the header was initialized, it may be backed with 0x00 or
* 0xff. Support both. */
#define CBFS_FILE_ATTR_TAG_UNUSED 0
#define CBFS_FILE_ATTR_TAG_UNUSED2 0xffffffff
#define CBFS_FILE_ATTR_TAG_COMPRESSION 0x42435a4c
#define CBFS_FILE_ATTR_TAG_HASH 0x68736148
#define CBFS_FILE_ATTR_TAG_IBB 0x32494242 /* Initial BootBlock */
/* The common fields of extended cbfs file attributes.
Attributes are expected to start with tag/len, then append their
specific fields. */
struct cbfs_file_attribute {
uint32_t tag;
/* len covers the whole structure, incl. tag and len */
uint32_t len;
uint8_t data[0];
} __packed;
struct cbfs_file_attr_compression {
uint32_t tag;
uint32_t len;
/* whole file compression format. 0 if no compression. */
uint32_t compression;
uint32_t decompressed_size;
} __packed;
struct cbfs_file_attr_hash {
uint32_t tag;
uint32_t len;
uint32_t hash_type;
/* hash_data is len - sizeof(struct) bytes */
uint8_t hash_data[];
} __packed;
/*** Component sub-headers ***/
/* Following are component sub-headers for the "standard"
component types */
/** This is the sub-header for stage components. Stages are
loaded by coreboot during the normal boot process */
struct cbfs_stage {
uint32_t compression; /** Compression type */
uint64_t entry; /** entry point */
@ -186,33 +61,6 @@ struct cbfs_stage {
uint32_t memlen; /** total length of object in memory */
} __packed;
/** this is the sub-header for payload components. Payloads
are loaded by coreboot at the end of the boot process */
struct cbfs_payload_segment {
uint32_t type;
uint32_t compression;
uint32_t offset;
uint64_t load_addr;
uint32_t len;
uint32_t mem_len;
} __packed;
struct cbfs_payload {
struct cbfs_payload_segment segments;
};
#define PAYLOAD_SEGMENT_CODE 0x45444F43
#define PAYLOAD_SEGMENT_DATA 0x41544144
#define PAYLOAD_SEGMENT_BSS 0x20535342
#define PAYLOAD_SEGMENT_PARAMS 0x41524150
#define PAYLOAD_SEGMENT_ENTRY 0x52544E45
struct cbfs_optionrom {
uint32_t compression;
uint32_t len;
} __packed;
#define CBFS_MEDIA_INVALID_MAP_ADDRESS ((void*)(0xffffffff))
#define CBFS_DEFAULT_MEDIA ((void*)(0x0))

46
payloads/libpayload/include/cbfs_glue.h Normal file
View File

@ -0,0 +1,46 @@
/* SPDX-License-Identifier: BSD-3-Clause */
#ifndef _CBFS_CBFS_GLUE_H
#define _CBFS_CBFS_GLUE_H
#include <libpayload-config.h>
#include <boot_device.h>
#include <stdio.h>
#define CBFS_ENABLE_HASHING CONFIG(LP_CBFS_VERIFICATION)
#define ERROR(...) printf("CBFS ERROR: " __VA_ARGS__)
#define LOG(...) printf("CBFS: " __VA_ARGS__)
#define DEBUG(...) \
do { \
if (CONFIG(LP_DEBUG_CBFS)) \
printf("CBFS DEBUG: " __VA_ARGS__); \
} while (0)
struct cbfs_dev {
size_t offset;
size_t size;
};
struct cbfs_boot_device {
struct cbfs_dev dev;
void *mcache;
size_t mcache_size;
};
typedef const struct cbfs_dev *cbfs_dev_t;
static inline ssize_t cbfs_dev_read(cbfs_dev_t dev, void *buffer, size_t offset, size_t size)
{
if (offset + size < offset || offset + size > dev->size)
return CB_ERR_ARG;
return boot_device_read(buffer, dev->offset + offset, size);
}
static inline size_t cbfs_dev_size(cbfs_dev_t dev)
{
return dev->size;
}
#endif /* _CBFS_CBFS_GLUE_H */

83
payloads/libpayload/include/cbfs_legacy.h Normal file
View File

@ -0,0 +1,83 @@
/*
*
* Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
* Copyright (C) 2013 Google, Inc.
*
* This file is dual-licensed. You can choose between:
* - The GNU GPL, version 2, as published by the Free Software Foundation
* - The revised BSD license (without advertising clause)
*
* ---------------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* ---------------------------------------------------------------------------
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ---------------------------------------------------------------------------
*/
#ifndef _CBFS_LEGACY_H_
#define _CBFS_LEGACY_H_
#include <cbfs_core.h>
#include <libpayload.h>
/* legacy APIs */
const struct cbfs_header *get_cbfs_header(void);
struct cbfs_file *cbfs_find(const char *name);
void *cbfs_find_file(const char *name, int type);
int cbfs_execute_stage(struct cbfs_media *media, const char *name);
void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
uint16_t device);
void *cbfs_load_payload(struct cbfs_media *media, const char *name);
void *cbfs_load_stage(struct cbfs_media *media, const char *name);
/* Simple buffer for streaming media. */
struct cbfs_simple_buffer {
char *buffer;
size_t allocated;
size_t size;
size_t last_allocate;
};
void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer,
struct cbfs_media *media,
size_t offset, size_t count);
void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer,
const void *address);
// Utility functions
int run_address(void *f);
/* Defined in individual arch / board implementation. */
int init_default_cbfs_media(struct cbfs_media *media);
#endif

31
payloads/libpayload/libcbfs/Kconfig Normal file
View File

@ -0,0 +1,31 @@
## SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later
config CBFS
bool "CBFS support"
default y
help
CBFS is the archive format of coreboot
if CBFS
config DEBUG_CBFS
bool "Output verbose CBFS debug messages"
default n
help
This option enables additional CBFS related debug messages.
config ENABLE_CBFS_FALLBACK
bool "Fallback to RO (COREBOOT) region"
default n
help
When this option is enabled, the CBFS code will look for a file in the
RO (COREBOOT) region, if it isn't available in the active RW region.
This option makes sense only if CONFIG_VBOOT was enabled in the coreboot.
config CBFS_VERIFICATION
bool "Enable CBFS verification"
depends on VBOOT
help
This option enables hash verification of CBFS files in RO (COREBOOT) and RW regions.
endif

6
payloads/libpayload/libcbfs/Makefile.inc
View File

@ -28,3 +28,9 @@
libcbfs-$(CONFIG_LP_CBFS) += cbfs.c
libcbfs-$(CONFIG_LP_CBFS) += ram_media.c
libcbfs-$(CONFIG_LP_CBFS) += cbfs_legacy.c
ifeq ($(CONFIG_LP_CBFS),y)
libcbfs-srcs += $(coreboottop)/src/commonlib/bsd/cbfs_private.c
libcbfs-srcs += $(coreboottop)/src/commonlib/bsd/cbfs_mcache.c
endif

365
payloads/libpayload/libcbfs/cbfs.c
View File

@ -1,243 +1,198 @@
/*
*
* Copyright (C) 2011 secunet Security Networks AG
* Copyright (C) 2013 Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#define LIBPAYLOAD
/* SPDX-License-Identifier: BSD-3-Clause */
#ifdef LIBPAYLOAD
#include <libpayload-config.h>
# if CONFIG(LP_LZMA)
# include <lzma.h>
# define CBFS_CORE_WITH_LZMA
# endif
# if CONFIG(LP_LZ4)
# include <lz4.h>
# define CBFS_CORE_WITH_LZ4
# endif
# define CBFS_MINI_BUILD
#elif defined(__SMM__)
# define CBFS_MINI_BUILD
#else
# define CBFS_CORE_WITH_LZMA
# define CBFS_CORE_WITH_LZ4
# include <lib.h>
#endif
#include <arch/virtual.h>
#include <assert.h>
#include <cbfs.h>
#include <commonlib/bsd/cbfs_private.h>
#include <commonlib/bsd/fmap_serialized.h>
#include <libpayload.h>
#include <lz4.h>
#include <lzma.h>
#include <string.h>
#include <sysinfo.h>
#ifdef LIBPAYLOAD
# include <stdio.h>
# define DEBUG(x...)
# define LOG(x...)
# define ERROR(x...) printf(x)
#else
# include <console/console.h>
# define ERROR(x...) printk(BIOS_ERR, "CBFS: " x)
# define LOG(x...) printk(BIOS_INFO, "CBFS: " x)
# if CONFIG_LP_DEBUG_CBFS
# define DEBUG(x...) printk(BIOS_SPEW, "CBFS: " x)
# else
# define DEBUG(x...)
# endif
#endif
#include "cbfs_core.c"
#ifndef __SMM__
static inline int tohex4(unsigned int c)
static const struct cbfs_boot_device *cbfs_get_boot_device(bool force_ro)
{
return (c <= 9) ? (c + '0') : (c - 10 + 'a');
static struct cbfs_boot_device ro;
static struct cbfs_boot_device rw;
if (!force_ro) {
if (!rw.dev.size) {
rw.dev.offset = lib_sysinfo.cbfs_offset;
rw.dev.size = lib_sysinfo.cbfs_size;
rw.mcache = phys_to_virt(lib_sysinfo.cbfs_rw_mcache_offset);
rw.mcache_size = lib_sysinfo.cbfs_rw_mcache_size;
}
return &rw;
}
static void tohex16(unsigned int val, char* dest)
{
dest[0] = tohex4(val>>12);
dest[1] = tohex4((val>>8) & 0xf);
dest[2] = tohex4((val>>4) & 0xf);
dest[3] = tohex4(val & 0xf);
if (ro.dev.size)
return &ro;
if (fmap_locate_area("COREBOOT", &ro.dev.offset, &ro.dev.size))
return NULL;
ro.mcache = phys_to_virt(lib_sysinfo.cbfs_ro_mcache_offset);
ro.mcache_size = lib_sysinfo.cbfs_ro_mcache_size;
return &ro;
}
void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
uint16_t device)
ssize_t _cbfs_boot_lookup(const char *name, bool force_ro, union cbfs_mdata *mdata)
{
char name[17] = "pciXXXX,XXXX.rom";
const struct cbfs_boot_device *cbd = cbfs_get_boot_device(force_ro);
if (!cbd)
return CB_ERR;
tohex16(vendor, name+3);
tohex16(device, name+8);
size_t data_offset;
cb_err_t err = CB_CBFS_CACHE_FULL;
if (cbd->mcache_size)
err = cbfs_mcache_lookup(cbd->mcache, cbd->mcache_size, name, mdata,
&data_offset);
return cbfs_get_file_content(media, name, CBFS_TYPE_OPTIONROM, NULL);
if (err == CB_CBFS_CACHE_FULL)
err = cbfs_lookup(&cbd->dev, name, mdata, &data_offset, NULL);
/* Fallback to RO if possible. */
if (CONFIG(LP_ENABLE_CBFS_FALLBACK) && !force_ro && err == CB_CBFS_NOT_FOUND) {
LOG("Fall back to RO region for '%s'\n", name);
return _cbfs_boot_lookup(name, true, mdata);
}
void * cbfs_load_stage(struct cbfs_media *media, const char *name)
if (err) {
if (err == CB_CBFS_NOT_FOUND)
LOG("'%s' not found.\n", name);
else
ERROR("Error %d when looking up '%s'\n", err, name);
return err;
}
return cbd->dev.offset + data_offset;
}
void cbfs_unmap(void *mapping)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL);
/* this is a mess. There is no ntohll. */
/* for now, assume compatible byte order until we solve this. */
uintptr_t entry;
uint32_t final_size;
free(mapping);
}
if (stage == NULL)
return (void *) -1;
static bool cbfs_file_hash_mismatch(const void *buffer, size_t size,
const union cbfs_mdata *mdata)
{
if (!CONFIG(LP_CBFS_VERIFICATION))
return false;
LOG("loading stage %s @ %p (%d bytes), entry @ 0x%llx\n",
name,
(void*)(uintptr_t) stage->load, stage->memlen,
stage->entry);
const struct vb2_hash *hash = cbfs_file_hash(mdata);
if (!hash) {
ERROR("'%s' does not have a file hash!\n", mdata->h.filename);
return true;
}
if (vb2_hash_verify(buffer, size, hash) != VB2_SUCCESS) {
ERROR("'%s' file hash mismatch!\n", mdata->h.filename);
return true;
}
final_size = cbfs_decompress(stage->compression,
((unsigned char *) stage) +
sizeof(struct cbfs_stage),
stage->len,
(void *) (uintptr_t) stage->load,
stage->memlen);
if (!final_size) {
entry = -1;
return false;
}
static size_t cbfs_load_and_decompress(size_t offset, size_t in_size, void *buffer,
size_t buffer_size, uint32_t compression,
const union cbfs_mdata *mdata)
{
void *load = buffer;
size_t out_size = 0;
DEBUG("Decompressing %zu bytes from '%s' to %p with algo %d\n", in_size,
mdata->h.filename, buffer, compression);
if (compression != CBFS_COMPRESS_NONE) {
load = malloc(in_size);
if (!load) {
ERROR("'%s' buffer allocation failed\n", mdata->h.filename);
return 0;
}
}
if (boot_device_read(load, offset, in_size) != in_size) {
ERROR("'%s' failed to read contents of file\n", mdata->h.filename);
goto out;
}
memset((void *)((uintptr_t)stage->load + final_size), 0,
stage->memlen - final_size);
DEBUG("stage loaded.\n");
entry = stage->entry;
// entry = ntohll(stage->entry);
if (cbfs_file_hash_mismatch(buffer, in_size, mdata))
goto out;
switch (compression) {
case CBFS_COMPRESS_NONE:
out_size = in_size;
break;
case CBFS_COMPRESS_LZ4:
if (!CONFIG(LP_LZ4))
goto out;
out_size = ulz4fn(load, in_size, buffer, buffer_size);
break;
case CBFS_COMPRESS_LZMA:
if (!CONFIG(LP_LZMA))
goto out;
out_size = ulzman(load, in_size, buffer, buffer_size);
break;
default:
ERROR("'%s' decompression algo %d not supported\n", mdata->h.filename,
compression);
}
out:
free(stage);
return (void *) entry;
if (load != buffer)
free(load);
return out_size;
}
int cbfs_execute_stage(struct cbfs_media *media, const char *name)
void *_cbfs_load(const char *name, void *buf, size_t *size_inout, bool force_ro)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL);
ssize_t offset;
size_t out_size;
union cbfs_mdata mdata;
bool malloced = false;
if (stage == NULL)
return 1;
DEBUG("%s(name='%s', buf=%p, force_ro=%s)\n", __func__, name, buf,
force_ro ? "true" : "false");
if (ntohl(stage->compression) != CBFS_COMPRESS_NONE) {
LOG("Unable to run %s: Compressed file"
"Not supported for in-place execution\n", name);
free(stage);
return 1;
}
LOG("run @ %p\n", (void *) (uintptr_t)ntohll(stage->entry));
int result = run_address((void *)(uintptr_t)ntohll(stage->entry));
free(stage);
return result;
}
void *cbfs_load_payload(struct cbfs_media *media, const char *name)
{
return (struct cbfs_payload *)cbfs_get_file_content(
media, name, CBFS_TYPE_SELF, NULL);
}
struct cbfs_file *cbfs_find(const char *name) {
struct cbfs_handle *handle = cbfs_get_handle(CBFS_DEFAULT_MEDIA, name);
struct cbfs_media *m = &handle->media;
void *ret;
if (!handle)
offset = _cbfs_boot_lookup(name, force_ro, &mdata);
if (offset < 0)
return NULL;
ret = m->map(m, handle->media_offset,
handle->content_offset + handle->content_size);
if (ret == CBFS_MEDIA_INVALID_MAP_ADDRESS) {
free(handle);
uint32_t compression = CBFS_COMPRESS_NONE;
const struct cbfs_file_attr_compression *cattr =
cbfs_find_attr(&mdata, CBFS_FILE_ATTR_TAG_COMPRESSION, sizeof(*cattr));
if (cattr) {
compression = be32toh(cattr->compression);
out_size = be32toh(cattr->decompressed_size);
} else {
out_size = be32toh(mdata.h.len);
}
if (buf) {
if (!size_inout || *size_inout < out_size) {
ERROR("'%s' buffer too small", mdata.h.filename);
return NULL;
}
free(handle);
return ret;
}
void *cbfs_find_file(const char *name, int type) {
return cbfs_get_file_content(CBFS_DEFAULT_MEDIA, name, type, NULL);
}
const struct cbfs_header *get_cbfs_header(void) {
return cbfs_get_header(CBFS_DEFAULT_MEDIA);
}
/* Simple buffer */
void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer,
struct cbfs_media *media,
size_t offset, size_t count) {
void *address = buffer->buffer + buffer->allocated;
DEBUG("simple_buffer_map(offset=%zu, count=%zu): "
"allocated=%zu, size=%zu, last_allocate=%zu\n",
offset, count, buffer->allocated, buffer->size,
buffer->last_allocate);
if (buffer->allocated + count >= buffer->size)
return CBFS_MEDIA_INVALID_MAP_ADDRESS;
if (media->read(media, address, offset, count) != count) {
ERROR("simple_buffer: fail to read %zd bytes from 0x%zx\n",
count, offset);
return CBFS_MEDIA_INVALID_MAP_ADDRESS;
}
buffer->allocated += count;
buffer->last_allocate = count;
return address;
}
void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer,
const void *address) {
// TODO Add simple buffer management so we can free more than last
// allocated one.
DEBUG("simple_buffer_unmap(address=%p): "
"allocated=%zu, size=%zu, last_allocate=%zu\n",
address, buffer->allocated, buffer->size,
buffer->last_allocate);
if ((buffer->buffer + buffer->allocated - buffer->last_allocate) ==
address) {
buffer->allocated -= buffer->last_allocate;
buffer->last_allocate = 0;
}
} else {
buf = malloc(out_size);
if (!buf) {
ERROR("'%s' allocation failure", mdata.h.filename);
return NULL;
}
/**
* run_address is passed the address of a function taking no parameters and
* jumps to it, returning the result.
* @param f the address to call as a function.
* @return value returned by the function.
*/
int run_address(void *f)
{
int (*v) (void);
v = f;
return v();
malloced = true;
}
#endif
if (cbfs_load_and_decompress(offset, be32toh(mdata.h.len), buf, out_size, compression,
&mdata)
!= out_size) {
if (malloced)
free(buf);
return NULL;
}
if (size_inout)
*size_inout = out_size;
return buf;
}

1
payloads/libpayload/libcbfs/cbfs_core.c
View File

@ -242,7 +242,6 @@ void *cbfs_get_contents(struct cbfs_handle *handle, size_t *size, size_t limit)
cbfs_get_attr(handle, CBFS_FILE_ATTR_TAG_COMPRESSION);
if (comp) {
algo = ntohl(comp->compression);
DEBUG("File '%s' is compressed (alg=%d)\n", name, algo);
*size = ntohl(comp->decompressed_size);
/* TODO: Implement partial decompression with |limit| */
}

223
payloads/libpayload/libcbfs/cbfs_legacy.c Normal file
View File

@ -0,0 +1,223 @@
/*
*
* Copyright (C) 2011 secunet Security Networks AG
* Copyright (C) 2013 Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <libpayload-config.h>
#if CONFIG(LP_LZMA)
# include <lzma.h>
# define CB_CBFS_CORE_WITH_LZMA
#endif
#if CONFIG(LP_LZ4)
# include <lz4.h>
# define CB_CBFS_CORE_WITH_LZ4
#endif
#include <cbfs_legacy.h>
#include <stdio.h>
#define DEBUG(x...)
#define LOG(x...)
#define ERROR(x...) printf(x)
#ifndef __SMM__
#include "cbfs_core.c"
static inline int tohex4(unsigned int c)
{
return (c <= 9) ? (c + '0') : (c - 10 + 'a');
}
static void tohex16(unsigned int val, char *dest)
{
dest[0] = tohex4(val>>12);
dest[1] = tohex4((val>>8) & 0xf);
dest[2] = tohex4((val>>4) & 0xf);
dest[3] = tohex4(val & 0xf);
}
void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
uint16_t device)
{
char name[17] = "pciXXXX,XXXX.rom";
tohex16(vendor, name+3);
tohex16(device, name+8);
return cbfs_get_file_content(media, name, CBFS_TYPE_OPTIONROM, NULL);
}
void *cbfs_load_stage(struct cbfs_media *media, const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL);
/* this is a mess. There is no ntohll. */
/* for now, assume compatible byte order until we solve this. */
uintptr_t entry;
uint32_t final_size;
if (stage == NULL)
return (void *) -1;
LOG("loading stage %s @ %p (%d bytes), entry @ 0x%llx\n", name,
(void *)(uintptr_t)stage->load, stage->memlen, stage->entry);
final_size = cbfs_decompress(stage->compression,
((unsigned char *) stage) +
sizeof(struct cbfs_stage),
stage->len,
(void *) (uintptr_t) stage->load,
stage->memlen);
if (!final_size) {
entry = -1;
goto out;
}
memset((void *)((uintptr_t)stage->load + final_size), 0,
stage->memlen - final_size);
DEBUG("stage loaded.\n");
entry = stage->entry;
// entry = ntohll(stage->entry);
out:
free(stage);
return (void *) entry;
}
int cbfs_execute_stage(struct cbfs_media *media, const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL);
if (stage == NULL)
return 1;
if (ntohl(stage->compression) != CBFS_COMPRESS_NONE) {
LOG("Unable to run %s: Compressed file"
"Not supported for in-place execution\n", name);
free(stage);
return 1;
}
LOG("run @ %p\n", (void *) (uintptr_t)ntohll(stage->entry));
int result = run_address((void *)(uintptr_t)ntohll(stage->entry));
free(stage);
return result;
}
void *cbfs_load_payload(struct cbfs_media *media, const char *name)
{
return (struct cbfs_payload *)cbfs_get_file_content(
media, name, CBFS_TYPE_SELF, NULL);
}
struct cbfs_file *cbfs_find(const char *name)
{
struct cbfs_handle *handle = cbfs_get_handle(CBFS_DEFAULT_MEDIA, name);
struct cbfs_media *m = &handle->media;
void *ret;
if (!handle)
return NULL;
ret = m->map(m, handle->media_offset,
handle->content_offset + handle->content_size);
if (ret == CBFS_MEDIA_INVALID_MAP_ADDRESS) {
free(handle);
return NULL;
}
free(handle);
return ret;
}
void *cbfs_find_file(const char *name, int type)
{
return cbfs_get_file_content(CBFS_DEFAULT_MEDIA, name, type, NULL);
}
const struct cbfs_header *get_cbfs_header(void)
{
return cbfs_get_header(CBFS_DEFAULT_MEDIA);
}
/* Simple buffer */
void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer, struct cbfs_media *media,
size_t offset, size_t count)
{
void *address = buffer->buffer + buffer->allocated;
DEBUG("simple_buffer_map(offset=%zu, count=%zu): "
"allocated=%zu, size=%zu, last_allocate=%zu\n",
offset, count, buffer->allocated, buffer->size,
buffer->last_allocate);
if (buffer->allocated + count >= buffer->size)
return CBFS_MEDIA_INVALID_MAP_ADDRESS;
if (media->read(media, address, offset, count) != count) {
ERROR("simple_buffer: fail to read %zd bytes from 0x%zx\n",
count, offset);
return CBFS_MEDIA_INVALID_MAP_ADDRESS;
}
buffer->allocated += count;
buffer->last_allocate = count;
return address;
}
void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer, const void *address)
{
// TODO Add simple buffer management so we can free more than last
// allocated one.
DEBUG("simple_buffer_unmap(address=%p): "
"allocated=%zu, size=%zu, last_allocate=%zu\n",
address, buffer->allocated, buffer->size,
buffer->last_allocate);
if ((buffer->buffer + buffer->allocated - buffer->last_allocate) ==
address) {
buffer->allocated -= buffer->last_allocate;
buffer->last_allocate = 0;
}
return NULL;
}
/**
* run_address is passed the address of a function taking no parameters and
* jumps to it, returning the result.
* @param f the address to call as a function.
* @return value returned by the function.
*/
int run_address(void *f)
{
int (*v)(void);
v = f;
return v();
}
#endif /* __SMM__ */

1
payloads/libpayload/tests/Makefile.inc
View File

@ -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

114
payloads/libpayload/tests/include/mocks/cbfs_util.h Normal file
View File

@ -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 */

33
payloads/libpayload/tests/libcbfs/Makefile.inc Normal file
View File

@ -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

642
payloads/libpayload/tests/libcbfs/cbfs-lookup-test.c Normal file
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@ -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);
}

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/* 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);
}

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payloads/libpayload/tests/mocks/cbfs_file_mock.c Normal file
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/* 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),
},
};

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/* 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)
;
}