Version: v0.7.1 Latest Latest

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Published: May 4, 2021 License: Apache-2.0, BSD-3-Clause Imports: 12 Imported by: 0



This implementation was originally forked from flynn/go-tuf

This implementation retains the same 3 Clause BSD license present on the original flynn implementation.



Package tuf defines the core TUF logic around manipulating a repo.



This section is empty.


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var ErrBuildDone = fmt.Errorf(
	"the builder has finished building and cannot accept any more input or produce any more output")

ErrBuildDone is returned when any functions are called on RepoBuilder, and it is already finished building


This section is empty.


type ConsistentInfo added in v0.3.0

type ConsistentInfo struct {
	RoleName data.RoleName
	// contains filtered or unexported fields

ConsistentInfo is the consistent name and size of a role, or just the name of the role and a -1 if no file metadata for the role is known

func (ConsistentInfo) ChecksumKnown added in v0.3.0

func (c ConsistentInfo) ChecksumKnown() bool

ChecksumKnown determines whether or not we know enough to provide a size and consistent name

func (ConsistentInfo) ConsistentName added in v0.3.0

func (c ConsistentInfo) ConsistentName() string

ConsistentName returns the consistent name (rolename.sha256) for the role given this consistent information

func (ConsistentInfo) Length added in v0.3.0

func (c ConsistentInfo) Length() int64

Length returns the expected length of the role as per this consistent information - if no checksum information is known, the size is -1.

type ErrInvalidBuilderInput added in v0.3.0

type ErrInvalidBuilderInput struct {
	// contains filtered or unexported fields

ErrInvalidBuilderInput is returned when RepoBuilder.Load is called with the wrong type of metadata for the state that it's in

func (ErrInvalidBuilderInput) Error added in v0.3.0

func (e ErrInvalidBuilderInput) Error() string

type ErrLocalRootExpired

type ErrLocalRootExpired struct{}

ErrLocalRootExpired - the local root file is out of date

func (ErrLocalRootExpired) Error

func (e ErrLocalRootExpired) Error() string

type ErrMetaExpired

type ErrMetaExpired struct{}

ErrMetaExpired - metadata file has expired

func (ErrMetaExpired) Error

func (e ErrMetaExpired) Error() string

type ErrNotLoaded

type ErrNotLoaded struct {
	Role data.RoleName

ErrNotLoaded - attempted to access data that has not been loaded into the repo. This means specifically that the relevant JSON file has not been loaded.

func (ErrNotLoaded) Error

func (err ErrNotLoaded) Error() string

type ErrSigVerifyFail

type ErrSigVerifyFail struct{}

ErrSigVerifyFail - signature verification failed

func (ErrSigVerifyFail) Error

func (e ErrSigVerifyFail) Error() string

type Repo

type Repo struct {
	Root      *data.SignedRoot
	Targets   map[data.RoleName]*data.SignedTargets
	Snapshot  *data.SignedSnapshot
	Timestamp *data.SignedTimestamp
	// contains filtered or unexported fields

Repo is an in memory representation of the TUF Repo. It operates at the data.Signed level, accepting and producing data.Signed objects. Users of a Repo are responsible for fetching raw JSON and using the Set* functions to populate the Repo instance.

func NewRepo

func NewRepo(cryptoService signed.CryptoService) *Repo

NewRepo initializes a Repo instance with a CryptoService. If the Repo will only be used for reading, the CryptoService can be nil.

func (*Repo) AddBaseKeys

func (tr *Repo) AddBaseKeys(role data.RoleName, keys ...data.PublicKey) error

AddBaseKeys is used to add keys to the role in root.json

func (*Repo) AddTargets

func (tr *Repo) AddTargets(role data.RoleName, targets data.Files) (data.Files, error)

AddTargets will attempt to add the given targets specifically to the directed role. If the metadata for the role doesn't exist yet, AddTargets will create one.

func (*Repo) DeleteDelegation

func (tr *Repo) DeleteDelegation(roleName data.RoleName) error

DeleteDelegation removes a delegated targets role from its parent targets object. It also deletes the delegation from the snapshot. DeleteDelegation will only make use of the role Name field.

func (*Repo) GetAllLoadedRoles

func (tr *Repo) GetAllLoadedRoles() []*data.Role

GetAllLoadedRoles returns a list of all role entries loaded in this TUF repo, could be empty

func (*Repo) GetBaseRole

func (tr *Repo) GetBaseRole(name data.RoleName) (data.BaseRole, error)

GetBaseRole gets a base role from this repo's metadata

func (*Repo) GetDelegationRole

func (tr *Repo) GetDelegationRole(name data.RoleName) (data.DelegationRole, error)

GetDelegationRole gets a delegation role from this repo's metadata, walking from the targets role down to the delegation itself

func (*Repo) InitRoot

func (tr *Repo) InitRoot(root, timestamp, snapshot, targets data.BaseRole, consistent bool) error

InitRoot initializes an empty root file with the 4 core roles passed to the method, and the consistent flag.

func (*Repo) InitSnapshot

func (tr *Repo) InitSnapshot() error

InitSnapshot initializes a snapshot based on the current root and targets

func (*Repo) InitTargets

func (tr *Repo) InitTargets(role data.RoleName) (*data.SignedTargets, error)

InitTargets initializes an empty targets, and returns the new empty target

func (*Repo) InitTimestamp

func (tr *Repo) InitTimestamp() error

InitTimestamp initializes a timestamp based on the current snapshot

func (*Repo) PurgeDelegationKeys added in v0.4.0

func (tr *Repo) PurgeDelegationKeys(role data.RoleName, removeKeys []string) error

PurgeDelegationKeys removes the provided canonical key IDs from all delegations present in the subtree rooted at role. The role argument must be provided in a wildcard format, i.e. targets/* would remove the key from all delegations in the repo

func (*Repo) RemoveBaseKeys

func (tr *Repo) RemoveBaseKeys(role data.RoleName, keyIDs ...string) error

RemoveBaseKeys is used to remove keys from the roles in root.json

func (*Repo) RemoveTargets

func (tr *Repo) RemoveTargets(role data.RoleName, targets ...string) error

RemoveTargets removes the given target (paths) from the given target role (delegation)

func (*Repo) ReplaceBaseKeys

func (tr *Repo) ReplaceBaseKeys(role data.RoleName, keys ...data.PublicKey) error

ReplaceBaseKeys is used to replace all keys for the given role with the new keys

func (*Repo) SignRoot

func (tr *Repo) SignRoot(expires time.Time, extraSigningKeys data.KeyList) (*data.Signed, error)

SignRoot signs the root, using all keys from the "root" role (i.e. currently trusted) as well as available keys used to sign the previous version, if the public part is carried in tr.Root.Keys and the private key is available (i.e. probably previously trusted keys, to allow rollover). If there are any errors, attempt to put root back to the way it was (so version won't be incremented, for instance). Extra signing keys can be added to support older clients

func (*Repo) SignSnapshot

func (tr *Repo) SignSnapshot(expires time.Time) (*data.Signed, error)

SignSnapshot updates the snapshot based on the current targets and root then signs it

func (*Repo) SignTargets

func (tr *Repo) SignTargets(role data.RoleName, expires time.Time) (*data.Signed, error)

SignTargets signs the targets file for the given top level or delegated targets role

func (*Repo) SignTimestamp

func (tr *Repo) SignTimestamp(expires time.Time) (*data.Signed, error)

SignTimestamp updates the timestamp based on the current snapshot then signs it

func (Repo) TargetDelegations

func (tr Repo) TargetDelegations(role data.RoleName, path string) []*data.Role

TargetDelegations returns a slice of Roles that are valid publishers for the target path provided.

func (Repo) TargetMeta

func (tr Repo) TargetMeta(role data.RoleName, path string) *data.FileMeta

TargetMeta returns the FileMeta entry for the given path in the targets file associated with the given role. This may be nil if the target isn't found in the targets file.

func (*Repo) UpdateDelegationKeys

func (tr *Repo) UpdateDelegationKeys(roleName data.RoleName, addKeys data.KeyList, removeKeys []string, newThreshold int) error

UpdateDelegationKeys updates the appropriate delegations, either adding a new delegation or updating an existing one. If keys are provided, the IDs will be added to the role (if they do not exist there already), and the keys will be added to the targets file.

func (*Repo) UpdateDelegationPaths

func (tr *Repo) UpdateDelegationPaths(roleName data.RoleName, addPaths, removePaths []string, clearPaths bool) error

UpdateDelegationPaths updates the appropriate delegation's paths. It is not allowed to create a new delegation.

func (*Repo) UpdateSnapshot

func (tr *Repo) UpdateSnapshot(role data.RoleName, s *data.Signed) error

UpdateSnapshot updates the FileMeta for the given role based on the Signed object

func (*Repo) UpdateTimestamp

func (tr *Repo) UpdateTimestamp(s *data.Signed) error

UpdateTimestamp updates the snapshot meta in the timestamp based on the Signed object

func (*Repo) VerifyCanSign

func (tr *Repo) VerifyCanSign(roleName data.RoleName) error

VerifyCanSign returns nil if the role exists and we have at least one signing key for the role, false otherwise. This does not check that we have enough signing keys to meet the threshold, since we want to support the use case of multiple signers for a role. It returns an error if the role doesn't exist or if there are no signing keys.

func (*Repo) WalkTargets

func (tr *Repo) WalkTargets(targetPath string, rolePath data.RoleName, visitTargets walkVisitorFunc, skipRoles ...data.RoleName) error

WalkTargets will apply the specified visitor function to iteratively walk the targets/delegation metadata tree, until receiving a StopWalk. The walk starts from the base "targets" role, and searches for the correct targetPath and/or rolePath to call the visitor function on. Any roles passed into skipRoles will be excluded from the walk, as well as roles in those subtrees

type RepoBuilder added in v0.3.0

type RepoBuilder interface {
	Load(roleName data.RoleName, content []byte, minVersion int, allowExpired bool) error
	LoadRootForUpdate(content []byte, minVersion int, isFinal bool) error
	GenerateSnapshot(prev *data.SignedSnapshot) ([]byte, int, error)
	GenerateTimestamp(prev *data.SignedTimestamp) ([]byte, int, error)
	Finish() (*Repo, *Repo, error)
	BootstrapNewBuilder() RepoBuilder
	BootstrapNewBuilderWithNewTrustpin(trustpin trustpinning.TrustPinConfig) RepoBuilder

	// informative functions
	IsLoaded(roleName data.RoleName) bool
	GetLoadedVersion(roleName data.RoleName) int
	GetConsistentInfo(roleName data.RoleName) ConsistentInfo

RepoBuilder is an interface for an object which builds a tuf.Repo

func NewBuilderFromRepo added in v0.4.0

func NewBuilderFromRepo(gun data.GUN, repo *Repo, trustpin trustpinning.TrustPinConfig) RepoBuilder

NewBuilderFromRepo allows us to bootstrap a builder given existing repo data. YOU PROBABLY SHOULDN'T BE USING THIS OUTSIDE OF TESTING CODE!!!

func NewRepoBuilder added in v0.3.0

func NewRepoBuilder(gun data.GUN, cs signed.CryptoService, trustpin trustpinning.TrustPinConfig) RepoBuilder

NewRepoBuilder is the only way to get a pre-built RepoBuilder

type StopWalk

type StopWalk struct{}

StopWalk - used by visitor functions to signal WalkTargets to stop walking

Source Files


Path Synopsis
Package utils contains tuf related utility functions however this file is hard forked from https://github.com/youmark/pkcs8 package.
Package utils contains tuf related utility functions however this file is hard forked from https://github.com/youmark/pkcs8 package.

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