pcr

Documentation

Overview

Package pcr contains code that handles PCR operations.

Index

• func CalculateBankData(pcrNumber int, alg tpm2.TPMAlgID, sectionData map[secureboot.Section]string, ...) ([]tpm2internal.BankData, error)
• type Digest
  • func NewDigest(alg crypto.Hash) *Digest
  • func (d *Digest) Extend(data []byte)
  • func (d *Digest) Hash() []byte
• type RSAKey
• type Signature
  • func Sign(digest []byte, hash crypto.Hash, key crypto.Signer) (*Signature, error)

Functions

func CalculateBankData

func CalculateBankData(pcrNumber int, alg tpm2.TPMAlgID, sectionData map[secureboot.Section]string, rsaKey RSAKey) ([]tpm2internal.BankData, error)

CalculateBankData calculates the PCR bank data for a given set of UKI file sections.

This mimics the process happening happening in the TPM when the UKI is being loaded.

Types

type Digest

type Digest struct {
	// contains filtered or unexported fields
}

Digest implements the PCR extension algorithm.

Each time `Extend` is called, the hash of the previous data is prepended to the hash of new data and hashed together.

The initial hash value is all zeroes.

func NewDigest

func NewDigest(alg crypto.Hash) *Digest

NewDigest creates a new Digest with the speified hash algorithm.

func (*Digest) Extend

func (d *Digest) Extend(data []byte)

Extend extends the current hash with the specified data.

func (*Digest) Hash

func (d *Digest) Hash() []byte

Hash returns the current hash value.

type RSAKey

type RSAKey interface {
	crypto.Signer
	PublicRSAKey() *rsa.PublicKey
}

RSAKey is the input for the CalculateBankData function.

type Signature

type Signature struct {
	Digest          string
	SignatureBase64 string
}

Signature returns the hashed signature digest and base64 encoded signature.

func Sign

func Sign(digest []byte, hash crypto.Hash, key crypto.Signer) (*Signature, error)

Sign the digest using specified hash and key.