AVB 2.0 spec. revision 1.1 introduces support for named persistent values
that must be tamper evident and allows AVB to store arbitrary key-value
pairs [1].
Introduce implementation of two additional AVB operations
read_persistent_value()/write_persistent_value() for retrieving/storing
named persistent values.
Correspondent pull request in the OP-TEE OS project repo [2].
[1]: https://android.googlesource.com/platform/external/avb/+/android-9.0.0_r22
[2]: https://github.com/OP-TEE/optee_os/pull/2699
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com>
With CONFIG_OPTEE_TA_AVB use the trusted application AVB provided by
OP-TEE to manage rollback indexes and device-lock status.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Compiling U-Boot with ubsan/asan libraries and running it in sandbox
may lead to below backtrace:
=> avb init 0
=> avb verify
## Android Verified Boot 2.0 version 1.1.0
read_is_device_unlocked not supported yet
common/avb_verify.c:407:31: runtime error: division by zero
AddressSanitizer:DEADLYSIGNAL
Reviewed-by: Igor Opaniuk <igor.opaniuk@linaro.org>
=================================================================
==9388==ERROR: AddressSanitizer: FPE on unknown address 0x0000004b467f \
(pc 0x0000004b467f bp 0x000000000000 sp 0x7ffd899fe150 T0)
#0 0x4b467e in mmc_byte_io common/avb_verify.c:407
#1 0x4b4c47 in mmc_byte_io common/avb_verify.c:532
#2 0x4b4c47 in read_from_partition common/avb_verify.c:533
#3 0x69dc0d in load_and_verify_vbmeta lib/libavb/avb_slot_verify.c:560
#4 0x6a1ee6 in avb_slot_verify lib/libavb/avb_slot_verify.c:1139
#5 0x45dabd in do_avb_verify_part cmd/avb.c:245
#6 0x4af77c in cmd_call common/command.c:499
#7 0x4af77c in cmd_process common/command.c:538
#8 0x46bafc in run_pipe_real common/cli_hush.c:1677
#9 0x46bafc in run_list_real common/cli_hush.c:1875
#10 0x46c780 in run_list common/cli_hush.c:2024
#11 0x46c780 in parse_stream_outer common/cli_hush.c:3216
#12 0x46d34b in parse_file_outer common/cli_hush.c:3299
#13 0x4ad609 in cli_loop common/cli.c:217
#14 0x4625ae in main_loop common/main.c:65
#15 0x46f2d1 in run_main_loop common/board_r.c:648
#16 0x640253 in initcall_run_list lib/initcall.c:30
#17 0x46f9d0 in board_init_r common/board_r.c:879
#18 0x40539b in main arch/sandbox/cpu/start.c:321
#19 0x7fa94925f82f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#20 0x408908 in _start (/srv/R/u-boot-master/u-boot+0x408908)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: FPE common/avb_verify.c:407 in mmc_byte_io
==9388==ABORTING
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Cppcheck (v1.85) reports w/o this patch:
[common/avb_verify.c:738] -> [common/avb_verify.c:741]: (warning) \
Either the condition 'ops' is redundant or there is possible null \
pointer dereference: ops.
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@linaro.org>
Fix sparse complaint:
common/avb_verify.c:14:21: warning: \
symbol 'avb_root_pub' was not declared. Should it be static?
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@linaro.org>
Fix below compiler [1] warning:
common/avb_verify.c: In function ‘avb_find_dm_args’:
common/avb_verify.c:179:30: warning: left-hand operand of comma expression has no effect [-Wunused-value]
for (i = 0; i < AVB_MAX_ARGS, args[i]; ++i) {
[1] aarch64-linux-gnu-gcc (Linaro GCC 7.2-2017.11)
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Reviewed-by: Igor Opaniuk <igor.opaniuk@linaro.org>
Implement get_size_of_partition() operation,
which is required by the latest upstream libavb [1].
[1] https://android.googlesource.com/platform/external/avb/+/android-p-preview-5
Signed-off-by: Igor Opaniuk <igor.opaniuk@linaro.org>
Acked-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Use blk_dread()/blk_dwrite() in mmc_read()/mmc_write() AVB operation
implementations. This fixes compilation issues when CONFIG_BLK is
enabled.
Signed-off-by: Igor Opaniuk <igor.opaniuk@linaro.org>
Tested-by: Eugeniu Rosca <rosca.eugeniu@gmail.com>
1. Add initial support of boot states mode (red, green, yellow)
2. Add functions for enforcing dm-verity configurations
Signed-off-by: Igor Opaniuk <igor.opaniuk@linaro.org>
Implement AVB ops on top of existing mmc subsystem API. Currently there
is a full implementation of such operations, defined by [1]
AVB2.0 specification:
.read_from_partition() - reads N bytes from a partition identified by
a name.
.write_to_partition() - Writes N bytes to a partition identified by a name.
.validate_vbmeta_public_key() - checks if the given public ‘vbmeta’
partition is trusted.
.get_unique_guid_for_partition() - Gets the GUID for a partition identified
by a string name.
As [1] specification recommends to use tamper-evident storage for storing
rollback indexes and device state (LOCKED/UNLOCKED),
currently are only stubs instead of full implementation for these ops:
.read_rollback_index() - Gets the rollback index for a given index location
.write_rollback_index() - Sets the rollback index to a given location
.read_is_device_unlocked() - Gets where the device is unlocked
[1] https://android.googlesource.com/platform/external/avb/+/master/README.md
Signed-off-by: Igor Opaniuk <igor.opaniuk@linaro.org>
