Module spec_services

An implementation of UEFI spec 8.2 - Variable Services

This implementation is a direct implementation / transcription of the UEFI spec, and does not contain any Hyper-V specific features* (i.e: injecting various nvram vars related to secure boot, boot order, etc…).

*that isn’t entirely true just yet, as there is one bit of code that enforce read-only access to certain Hyper-V specific vars, but if the need arises, those code paths can be refactored.

Modules

auth_var_crypto

Cryptographic operations to validate authenticated variables

Structs

NvramResult

Unlike a typical result type, NvramErrors contain both a payload and an error code. Depending on the error code, an optional NvramError might be included as well, which provides more context.

NvramSpecServices

An implementation of UEFI spec 8.2 - Variable Services

ParsedAuthVar

Helper struct to collect various properties of a parsed authenticated var

SupportedAttrs

SetVariable validation is incredibly tricky, since there are a lot of subtle logic branches that are predicated on the presence (or lack thereof) of various attribute bits.

Enums

AuthError

NvramError

Traits

NvramServicesExt

Extension trait around NvramServices that makes it easier to use the API outside the context of the UEFI device.