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FmpDevicePkg: Add DECLARE_LENGTH opcode of dependency expression

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To avoid messy parsing of the Depex section of a Capsule, it would
be a lot easier for everyone involved if we preceded the Capsule Depex
Section with a length declaration. It provides simple bounds checking
to avoid having to parse the op-codes, but in the case of a malformed
depex being parsed, avoid other issues which can be messy.

REF: UEFI spec 2.10 Table 23.4

Signed-off-by: Yi Li <yi1.li@intel.com>

Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Wei6 Xu <wei6.xu@intel.com>
Reviewed-by: Wei6 Xu <wei6.xu@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
This commit is contained in:
Yi Li
2023-12-19 11:17:35 +08:00
committed by mergify[bot]
parent 00bf6890a9
commit 0223bdd4e4
3 changed files with 110 additions and 12 deletions
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3
FmpDevicePkg/PrivateInclude/FmpLastAttemptStatus.h
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@@ -66,6 +66,9 @@ enum LAST_ATTEMPT_STATUS_EXPANDED_ERROR_LIST {
LAST_ATTEMPT_STATUS_DEPENDENCY_LIB_ERROR_FMP_NOT_FOUND,
LAST_ATTEMPT_STATUS_DEPENDENCY_LIB_ERROR_PUSH_FAILURE,
LAST_ATTEMPT_STATUS_DEPENDENCY_LIB_ERROR_POP_FAILURE,
LAST_ATTEMPT_STATUS_DEPENDENCY_LIB_ERROR_DECLARE_LENGTH_NOT_FIRST_OPCODE,
LAST_ATTEMPT_STATUS_DEPENDENCY_LIB_ERROR_DECLARE_LENGTH_BEYOND_DEPEX,
LAST_ATTEMPT_STATUS_DEPENDENCY_LIB_ERROR_DECLARE_LENGTH_INCORRECT,
///
/// Last attempt status codes used in FmpDependencyCheckLib