ReactOS  0.4.15-dev-3299-gbe8e5fc
EFI_VARIABLE_AUTHENTICATION Struct Reference

#include <UefiMultiPhase.h>

Collaboration diagram for EFI_VARIABLE_AUTHENTICATION:

Public Attributes

UINT64 MonotonicCount
 
WIN_CERTIFICATE_UEFI_GUID AuthInfo
 

Detailed Description

AuthInfo is a WIN_CERTIFICATE using the wCertificateType WIN_CERTIFICATE_UEFI_GUID and the CertType EFI_CERT_TYPE_RSA2048_SHA256_GUID. If the attribute specifies authenticated access, then the Data buffer should begin with an authentication descriptor prior to the data payload and DataSize should reflect the the data.and descriptor size. The caller shall digest the Monotonic Count value and the associated data for the variable update using the SHA-256 1-way hash algorithm. The ensuing the 32-byte digest will be signed using the private key associated w/ the public/private 2048-bit RSA key-pair. The WIN_CERTIFICATE shall be used to describe the signature of the Variable data *Data. In addition, the signature will also include the MonotonicCount value to guard against replay attacks.

Definition at line 154 of file UefiMultiPhase.h.

Member Data Documentation

◆ AuthInfo

WIN_CERTIFICATE_UEFI_GUID EFI_VARIABLE_AUTHENTICATION::AuthInfo

Provides the authorization for the variable access. It is a signature across the

variable data and the Monotonic Count

value. Caller uses Private key that is

associated with a public key that has been

provisioned via the key exchange.

Definition at line 170 of file UefiMultiPhase.h.

◆ MonotonicCount

UINT64 EFI_VARIABLE_AUTHENTICATION::MonotonicCount

Included in the signature of

AuthInfo.Used to ensure freshness/no replay. Incremented during each

"Write" access.

Definition at line 161 of file UefiMultiPhase.h.


The documentation for this struct was generated from the following file: