attributes

Documentation

Index

• Variables
• func SerializeEfivars(f io.Writer, b []byte) error
• func WriteEfivars(name string, attrs Attributes, b []byte) error
• func WriteEfivarsFile(filename, b []byte, fixImmutable bool) error
• func WriteEfivarsWithGuid(name string, attrs Attributes, b []byte, guid util.EFIGUID) error
• type Attributes
  • func ParseEfivars(f io.Reader, size int) (Attributes, *bytes.Buffer, error)
  • func ReadEfivars(filename string) (Attributes, *bytes.Buffer, error)
  • func ReadEfivarsFile(filename string) (Attributes, *bytes.Buffer, error)
  • func ReadEfivarsWithGuid(filename string, guid util.EFIGUID) (Attributes, *bytes.Buffer, error)
  • func (a Attributes) Bytes() []byte
  • func (a Attributes) Equal(b Attributes) bool
  • func (a Attributes) Unmarshal(b *bytes.Buffer)

Variables

var (
	EFI_IMAGE_SECURITY_DATABASE_GUID = util.EFIGUID{0xd719b2cb, 0x3d3a, 0x4596, [8]uint8{0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f}}
	IMAGE_SECURITY_DATABASE          = "db"
	IMAGE_SECURITY_DATABASE1         = "dbx"
	IMAGE_SECURITY_DATABASE2         = "dbt"
	IMAGE_SECURITY_DATABASE3         = "dbr"
	ImageSecurityDatabases           = map[string]bool{
		IMAGE_SECURITY_DATABASE:  true,
		IMAGE_SECURITY_DATABASE1: true,
		IMAGE_SECURITY_DATABASE2: true,
		IMAGE_SECURITY_DATABASE3: true,
	}
)

Valid Databases db - authorized signature database dbx - forbidden signature database dbt - authorized timestamp signature database dbr - authorized recovery signature database

var EFI_GLOBAL_VARIABLE = util.EFIGUID{0x8BE4DF61, 0x93CA, 0x11d2, [8]uint8{0xAA, 0x0D, 0x00, 0xE0, 0x98, 0x03, 0x2B, 0x8C}}

var (
	Efivars = "/sys/firmware/efi/efivars"
)

var SizeofAttributes = 4

Functions

func SerializeEfivars

func SerializeEfivars(f io.Writer, b []byte) error

func WriteEfivars

func WriteEfivars(name string, attrs Attributes, b []byte) error

Write an

func WriteEfivarsFile

func WriteEfivarsFile(filename, b []byte, fixImmutable bool) error

func WriteEfivarsWithGuid

func WriteEfivarsWithGuid(name string, attrs Attributes, b []byte, guid util.EFIGUID) error

Write an EFI variable to sysfs TODO: Fix retryable writes

Types

type Attributes

type Attributes uint32

Section 8.2 Variable Services

const (
	EFI_VARIABLE_NON_VOLATILE                          Attributes = 0x00000001
	EFI_VARIABLE_BOOTSERVICE_ACCESS                    Attributes = 0x00000002
	EFI_VARIABLE_RUNTIME_ACCESS                        Attributes = 0x00000004
	EFI_VARIABLE_HARDWARE_ERROR_RECORD                 Attributes = 0x00000008
	EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS            Attributes = 0x00000010 // Deprecated, we only reserve it
	EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS Attributes = 0x00000020
	EFI_VARIABLE_APPEND_WRITE                          Attributes = 0x00000040
	EFI_VARIABLE_ENHANCED_AUTHENTICATED_ACCESS         Attributes = 0x00000080 // Uses the EFI_VARIABLE_AUTHENTICATION_3 struct
)

func ParseEfivars

func ParseEfivars(f io.Reader, size int) (Attributes, *bytes.Buffer, error)

func ReadEfivars

func ReadEfivars(filename string) (Attributes, *bytes.Buffer, error)

Reads a known EFI variable from efivarfs.

func ReadEfivarsFile

func ReadEfivarsFile(filename string) (Attributes, *bytes.Buffer, error)

For a full path instead of the inferred efivars path

func ReadEfivarsWithGuid

func ReadEfivarsWithGuid(filename string, guid util.EFIGUID) (Attributes, *bytes.Buffer, error)

func (Attributes) Bytes

func (a Attributes) Bytes() []byte

func (Attributes) Equal

func (a Attributes) Equal(b Attributes) bool

func (Attributes) Unmarshal

func (a Attributes) Unmarshal(b *bytes.Buffer)