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https://github.com/openharmony/kernel_linux_common_modules.git
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lihehe
e27f2a753a
Signed-off-by: lihehe <lihehao@huawei.com> Change-Id: I458ca1e44ac3c9342435a9c785c34186c1c635d8
123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* Copyright (c) 2023 Huawei Device Co., Ltd.
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*/
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#ifndef _CODE_SIGN_ELF_H
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#define _CODE_SIGN_ELF_H
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#include <linux/fs.h>
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#include <linux/code_sign.h>
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#define PAGE_SIZE_4K 12
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/*
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* Sign block of ELF file consists of
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* sign data and sign head
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*
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* Detailed structure:
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* +-------------------------------------------------+
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* | |type (4 bytes)| code signing|
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* | |length (4 bytes)| block |
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* | |offset (4 bytes)| header |
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* | +---------------------------+-------------|
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* | |type (4 bytes)| profile |
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* | |length (4 bytes)| block |
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* | |offset (4 bytes)| header |
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* | +---------------------------+-------------|
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* | | .. other block headers .. | |
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* | +---------------------------+-------------|
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* | SIGN |type (4 bytes)| merkle |
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* | |length (4 bytes)| tree |
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* | DATA |merkle tree data (N bytes)| block |
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* | +---------------------------+-------------|
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* | |type (4 bytes)| |
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* | |length (4 bytes)| |
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* | |version (1 byte )| |
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* | |hash alg (1 byte )| |
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* | |log2blocksize (1 byte )| |
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* | |salt size (1 byte )| |
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* | |signature size (4 bytes)| code sign |
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* | |data size (8 bytes)| block |
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* | |root hash (64 bytes)| |
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* | |salt (32 bytes)| |
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* | |flags (4 bytes)| |
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* | |reserved (4 bytes)| |
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* | |tree offset (8 bytes)| |
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* | |reserved (127 bytes)| |
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* | |cs version (1 byte )| |
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* | |signature (N bytes)| |
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* |-------+---------------------------+-------------|
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* | | magic string (16 bytes)| |
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* | SIGN | version (4 bytes) | |
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* | | sign data size (4 bytes) | |
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* | HEAD | sign block num (4 bytes) | |
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* | | padding (4 bytes) | |
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* +-------+-----------------------------------------+
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*/
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static const __u32 MAGIC_STRING_LEN = 16;
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static const char SIGN_MAGIC_STR[] = "elf sign block ";
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enum CODE_SIGNING_DATA_TYPE {
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TYPE_FS_VERITY_DESC = 0x1,
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TYPE_MERKLE_TREE = 0x2
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};
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enum BLOCK_TYPE {
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BLOCK_TYPE_UNSIGNED_PROFILE = 0x1,
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BLOCK_TYPE_SIGNED_PROFILE = 0x2,
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BLOCK_TYPE_CODE_SIGNING = 0x3
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};
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#pragma pack(push, 1)
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typedef struct
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{
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__u8 magic[16];
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__u8 version[4];
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__u32 sign_data_size;
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__u32 sign_block_num;
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__u32 padding;
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} sign_head_t;
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typedef struct
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{
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__u32 type;
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__u32 length;
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} tl_header_t;
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typedef struct
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{
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__u32 type;
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__u32 length;
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__u32 offset;
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} block_hdr_t;
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#pragma pack(pop)
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typedef struct
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{
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__u32 padding_length;
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char *merkle_tree_data;
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__u32 merkle_tree_length;
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} merkle_tree_t;
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typedef struct
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{
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/* sign data */
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block_hdr_t code_signing_block_hdr;
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block_hdr_t profile_block_hdr;
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/* code signing block */
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tl_header_t merkle_tree_hdr;
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merkle_tree_t *merkle_tree;
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tl_header_t fsverity_desc_hdr;
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struct code_sign_descriptor *fsverity_desc;
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/* sign head */
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sign_head_t sign_head;
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} sign_block_t;
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int elf_file_enable_fs_verity(struct file *file);
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#endif /* _CODE_SIGN_ELF_H */
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