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With this enhancement, mkeficapsule will be able to sign a capsule file when it is created. A signature added will be used later in the verification at FMP's SetImage() call. To do that, we need specify additional command parameters: -monotonic-cout <count> : monotonic count -private-key <private key file> : private key file -certificate <certificate file> : certificate file Only when all of those parameters are given, a signature will be added to a capsule file. Users are expected to maintain and increment the monotonic count at every time of the update for each firmware image. Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org> Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
116 lines
3 KiB
C
116 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright 2021 Linaro Limited
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* Author: AKASHI Takahiro
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*
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* derived from efi.h and efi_api.h to make the file POSIX-compliant
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*/
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#ifndef _EFI_CAPSULE_H
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#define _EFI_CAPSULE_H
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#include <stdint.h>
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/*
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* Gcc's predefined attributes are not recognized by clang.
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*/
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#ifndef __packed
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#define __packed __attribute__((__packed__))
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#endif
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#ifndef __aligned
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#define __aligned(x) __attribute__((__aligned__(x)))
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#endif
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typedef struct {
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uint8_t b[16];
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} efi_guid_t __aligned(8);
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#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
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{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \
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((a) >> 24) & 0xff, \
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(b) & 0xff, ((b) >> 8) & 0xff, \
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(c) & 0xff, ((c) >> 8) & 0xff, \
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(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } }
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#define EFI_FIRMWARE_MANAGEMENT_CAPSULE_ID_GUID \
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EFI_GUID(0x6dcbd5ed, 0xe82d, 0x4c44, 0xbd, 0xa1, \
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0x71, 0x94, 0x19, 0x9a, 0xd9, 0x2a)
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#define EFI_FIRMWARE_IMAGE_TYPE_UBOOT_FIT_GUID \
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EFI_GUID(0xae13ff2d, 0x9ad4, 0x4e25, 0x9a, 0xc8, \
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0x6d, 0x80, 0xb3, 0xb2, 0x21, 0x47)
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#define EFI_FIRMWARE_IMAGE_TYPE_UBOOT_RAW_GUID \
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EFI_GUID(0xe2bb9c06, 0x70e9, 0x4b14, 0x97, 0xa3, \
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0x5a, 0x79, 0x13, 0x17, 0x6e, 0x3f)
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#define EFI_CERT_TYPE_PKCS7_GUID \
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EFI_GUID(0x4aafd29d, 0x68df, 0x49ee, 0x8a, 0xa9, \
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0x34, 0x7d, 0x37, 0x56, 0x65, 0xa7)
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/* flags */
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#define CAPSULE_FLAGS_PERSIST_ACROSS_RESET 0x00010000
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struct efi_capsule_header {
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efi_guid_t capsule_guid;
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uint32_t header_size;
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uint32_t flags;
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uint32_t capsule_image_size;
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} __packed;
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struct efi_firmware_management_capsule_header {
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uint32_t version;
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uint16_t embedded_driver_count;
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uint16_t payload_item_count;
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uint32_t item_offset_list[];
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} __packed;
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/* image_capsule_support */
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#define CAPSULE_SUPPORT_AUTHENTICATION 0x0000000000000001
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struct efi_firmware_management_capsule_image_header {
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uint32_t version;
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efi_guid_t update_image_type_id;
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uint8_t update_image_index;
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uint8_t reserved[3];
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uint32_t update_image_size;
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uint32_t update_vendor_code_size;
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uint64_t update_hardware_instance;
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uint64_t image_capsule_support;
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} __packed;
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/**
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* win_certificate_uefi_guid - A certificate that encapsulates
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* a GUID-specific signature
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*
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* @hdr: Windows certificate header, cf. WIN_CERTIFICATE
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* @cert_type: Certificate type
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*/
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struct win_certificate_uefi_guid {
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struct {
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uint32_t dwLength;
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uint16_t wRevision;
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uint16_t wCertificateType;
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} hdr;
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efi_guid_t cert_type;
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} __packed;
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/**
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* efi_firmware_image_authentication - Capsule authentication method
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* descriptor
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*
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* This structure describes an authentication information for
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* a capsule with IMAGE_ATTRIBUTE_AUTHENTICATION_REQUIRED set
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* and should be included as part of the capsule.
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* Only EFI_CERT_TYPE_PKCS7_GUID is accepted.
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*
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* @monotonic_count: Count to prevent replay
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* @auth_info: Authentication info
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*/
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struct efi_firmware_image_authentication {
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uint64_t monotonic_count;
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struct win_certificate_uefi_guid auth_info;
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} __packed;
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#endif /* _EFI_CAPSULE_H */
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