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https://github.com/Telecominfraproject/OpenCellular.git
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ad6824ba4f
Change-Id: I8d52765227fd3355431bebc77dfbe0106c889eca BUG=chrome-os-partner:2748 TEST=compiles; will be porting to H2C next Review URL: http://codereview.chromium.org/6672068
190 lines
8.8 KiB
C
190 lines
8.8 KiB
C
/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Data structure definitions for verified boot, for on-disk / in-eeprom
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* data.
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*/
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#ifndef VBOOT_REFERENCE_VBOOT_STRUCT_H_
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#define VBOOT_REFERENCE_VBOOT_STRUCT_H_
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#include "sysincludes.h"
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__pragma(pack(push, 1)) /* Support packing for MSVC. */
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/* Public key data */
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typedef struct VbPublicKey {
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uint64_t key_offset; /* Offset of key data from start of this struct */
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uint64_t key_size; /* Size of key data in bytes (NOT strength of key
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* in bits) */
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uint64_t algorithm; /* Signature algorithm used by the key */
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uint64_t key_version; /* Key version */
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} __attribute__((packed)) VbPublicKey;
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#define EXPECTED_VBPUBLICKEY_SIZE 32
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/* Signature data (a secure hash, possibly signed) */
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typedef struct VbSignature {
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uint64_t sig_offset; /* Offset of signature data from start of this
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* struct */
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uint64_t sig_size; /* Size of signature data in bytes */
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uint64_t data_size; /* Size of the data block which was signed in bytes */
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} __attribute__((packed)) VbSignature;
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#define EXPECTED_VBSIGNATURE_SIZE 24
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#define KEY_BLOCK_MAGIC "CHROMEOS"
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#define KEY_BLOCK_MAGIC_SIZE 8
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#define KEY_BLOCK_HEADER_VERSION_MAJOR 2
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#define KEY_BLOCK_HEADER_VERSION_MINOR 1
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/* Flags for key_block_flags */
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/* The following flags set where the key is valid */
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#define KEY_BLOCK_FLAG_DEVELOPER_0 UINT64_C(0x01) /* Developer switch off */
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#define KEY_BLOCK_FLAG_DEVELOPER_1 UINT64_C(0x02) /* Developer switch on */
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#define KEY_BLOCK_FLAG_RECOVERY_0 UINT64_C(0x04) /* Not recovery mode */
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#define KEY_BLOCK_FLAG_RECOVERY_1 UINT64_C(0x08) /* Recovery mode */
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/* Key block, containing the public key used to sign some other chunk
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* of data. */
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typedef struct VbKeyBlockHeader {
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uint8_t magic[KEY_BLOCK_MAGIC_SIZE]; /* Magic number */
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uint32_t header_version_major; /* Version of this header format */
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uint32_t header_version_minor; /* Version of this header format */
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uint64_t key_block_size; /* Length of this entire key block,
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* including keys, signatures, and
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* padding, in bytes */
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VbSignature key_block_signature; /* Signature for this key block
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* (header + data pointed to by data_key)
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* For use with signed data keys*/
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VbSignature key_block_checksum; /* SHA-512 checksum for this key block
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* (header + data pointed to by data_key)
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* For use with unsigned data keys */
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uint64_t key_block_flags; /* Flags for key (KEY_BLOCK_FLAG_*) */
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VbPublicKey data_key; /* Key to verify the chunk of data */
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} __attribute__((packed)) VbKeyBlockHeader;
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/* This should be followed by:
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* 1) The data_key key data, pointed to by data_key.key_offset.
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* 2) The checksum data for (VBKeyBlockHeader + data_key data), pointed to
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* by key_block_checksum.sig_offset.
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* 3) The signature data for (VBKeyBlockHeader + data_key data), pointed to
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* by key_block_signature.sig_offset. */
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#define EXPECTED_VBKEYBLOCKHEADER_SIZE 112
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#define FIRMWARE_PREAMBLE_HEADER_VERSION_MAJOR 2
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#define FIRMWARE_PREAMBLE_HEADER_VERSION_MINOR 0
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/* Preamble block for rewritable firmware */
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typedef struct VbFirmwarePreambleHeader {
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uint64_t preamble_size; /* Size of this preamble, including keys,
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* signatures, and padding, in bytes */
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VbSignature preamble_signature; /* Signature for this preamble
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* (header + kernel subkey +
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* body signature) */
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uint32_t header_version_major; /* Version of this header format */
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uint32_t header_version_minor; /* Version of this header format */
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uint64_t firmware_version; /* Firmware version */
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VbPublicKey kernel_subkey; /* Key to verify kernel key block */
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VbSignature body_signature; /* Signature for the firmware body */
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} __attribute__((packed)) VbFirmwarePreambleHeader;
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/* This should be followed by:
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* 1) The kernel_subkey key data, pointed to by kernel_subkey.key_offset.
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* 2) The signature data for the firmware body, pointed to by
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* body_signature.sig_offset.
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* 3) The signature data for (VBFirmwarePreambleHeader + kernel_subkey data
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* + body signature data), pointed to by
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* preamble_signature.sig_offset. */
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#define EXPECTED_VBFIRMWAREPREAMBLEHEADER_SIZE 104
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#define KERNEL_PREAMBLE_HEADER_VERSION_MAJOR 2
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#define KERNEL_PREAMBLE_HEADER_VERSION_MINOR 0
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/* Preamble block for kernel */
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typedef struct VbKernelPreambleHeader {
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uint64_t preamble_size; /* Size of this preamble, including keys,
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* signatures, and padding, in bytes */
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VbSignature preamble_signature; /* Signature for this preamble
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* (header + body signature) */
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uint32_t header_version_major; /* Version of this header format */
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uint32_t header_version_minor; /* Version of this header format */
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uint64_t kernel_version; /* Kernel version */
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uint64_t body_load_address; /* Load address for kernel body */
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uint64_t bootloader_address; /* Address of bootloader, after body is
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* loaded at body_load_address */
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uint64_t bootloader_size; /* Size of bootloader in bytes */
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VbSignature body_signature; /* Signature for the kernel body */
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} __attribute__((packed)) VbKernelPreambleHeader;
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/* This should be followed by:
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* 2) The signature data for the kernel body, pointed to by
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* body_signature.sig_offset.
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* 3) The signature data for (VBFirmwarePreambleHeader + body signature
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* data), pointed to by preamble_signature.sig_offset. */
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#define EXPECTED_VBKERNELPREAMBLEHEADER_SIZE 96
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/* Minimum and recommended size of shared_data_blob in bytes. */
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#define VB_SHARED_DATA_MIN_SIZE 3072
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#define VB_SHARED_DATA_REC_SIZE 16384
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/* Data shared between LoadFirmware(), LoadKernel(), and OS.
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*
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* The boot process is:
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* 1) Caller allocates buffer, at least VB_SHARED_DATA_MIN bytes, ideally
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* VB_SHARED_DATA_REC_SIZE bytes.
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* 2) If non-recovery boot, this is passed to LoadFirmware(), which
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* initializes the buffer, adding this header and some data.
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* 3) Buffer is passed to LoadKernel(). If this is a recovery boot,
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* LoadKernel() initializes the buffer, adding this header. Regardless
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* of boot type, LoadKernel() adds some data to the buffer.
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* 4) Caller makes data available to the OS in a platform-dependent manner.
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* For example, via ACPI or ATAGs. */
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typedef struct VbSharedDataHeader {
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/* Fields present in version 1 */
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uint32_t struct_version; /* Version of this structure */
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uint64_t struct_size; /* Size of this structure in bytes */
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uint64_t data_size; /* Size of shared data buffer in bytes */
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uint64_t data_used; /* Amount of shared data used so far */
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VbPublicKey kernel_subkey; /* Kernel subkey, from firmware */
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uint64_t kernel_subkey_data_offset; /* Offset of kernel subkey data from
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* start of this struct */
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uint64_t kernel_subkey_data_size; /* Size of kernel subkey data */
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uint64_t flags; /* Flags */
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/* Timer values from VbGetTimer(). Unused values are set to 0. If a
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* function is called mutiple times, these are the times from the
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* most recent call. */
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uint64_t timer_load_firmware_start_enter; /* LoadFirmwareStart() - enter */
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uint64_t timer_load_firmware_start_exit; /* LoadFirmwareStart() - exit */
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uint64_t timer_load_firmware_enter; /* LoadFirmware() - enter */
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uint64_t timer_load_firmware_exit; /* LoadFirmware() - exit */
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uint64_t timer_load_kernel_enter; /* LoadKernel() - enter */
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uint64_t timer_load_kernel_exit; /* LoadKernel() - exit */
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/* After read-only firmware which uses version 1 is released, any additional
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* fields must be added below, and the struct version must be increased.
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* Before reading/writing those fields, make sure that the struct being
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* accessed is at least version 2.
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*
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* It's always ok for an older firmware to access a newer struct, since all
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* the fields it knows about are present. Newer firmware needs to use
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* reasonable defaults when accessing older structs. */
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} __attribute__((packed)) VbSharedDataHeader;
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#define VB_SHARED_DATA_VERSION 1 /* Version for struct_version */
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__pragma(pack(pop)) /* Support packing for MSVC. */
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#endif /* VBOOT_REFERENCE_VBOOT_STRUCT_H_ */
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