tuf

README

This is still a work in progress but will shortly be a fully compliant Go implementation of The Update Framework (TUF).

This implementation was originally forked from flynn/go-tuf, however in attempting to add delegations I found I was making such significant changes that I could not maintain backwards compatibility without the code becoming overly convoluted.

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

TODOs:

• Add Targets to existing repo
• Sign metadata files
• Refactor TufRepo to take care of signing and verification
• Ensure consistent capitalization in naming (TUF___ vs Tuf___)
• Make caching of metadata files smarter
• Add configuration for CLI commands. Order of configuration priority from most to least: flags, config file, defaults Notary should be the official CLI
• Reasses organization of data types. Possibly consolidate a few things into the data package but break up package into a few more distinct files
• Comprehensive test cases
• Delete files no longer in use
• Fix up errors. Some have to be instantiated, others don't, the inconsistency is annoying.
• Bump version numbers in meta files (could probably be done better)

Documentation

Overview

tuf defines the core TUF logic around manipulating a repo.

Index

• type ErrLocalRootExpired
  • func (e ErrLocalRootExpired) Error() string
• type ErrMetaExpired
  • func (e ErrMetaExpired) Error() string
• type ErrNotLoaded
  • func (err *ErrNotLoaded) Error() string
• type ErrSigVerifyFail
  • func (e ErrSigVerifyFail) Error() string
• type TufRepo
  • func NewTufRepo(keysDB *keys.KeyDB, signer *signed.Signer) *TufRepo
  • func (tr *TufRepo) AddBaseKeys(role string, keys ...data.Key) error
  • func (tr *TufRepo) AddTargets(role string, targets data.Files) (data.Files, error)
  • func (tr TufRepo) FindTarget(path string) *data.FileMeta
  • func (tr *TufRepo) InitRepo(consistent bool) error
  • func (tr *TufRepo) RemoveBaseKeys(role string, keyIDs ...string) error
  • func (tr *TufRepo) RemoveTargets(role string, targets ...string) error
  • func (tr *TufRepo) SetRoot(s *data.Signed) error
  • func (tr *TufRepo) SetSnapshot(s *data.Signed) error
  • func (tr *TufRepo) SetTargets(role string, s *data.Signed) error
  • func (tr *TufRepo) SetTimestamp(s *data.Signed) error
  • func (tr *TufRepo) SignRoot(expires time.Time) (*data.Signed, error)
  • func (tr *TufRepo) SignSnapshot(expires time.Time) (*data.Signed, error)
  • func (tr *TufRepo) SignTargets(role string, expires time.Time) (*data.Signed, error)
  • func (tr *TufRepo) SignTimestamp(expires time.Time) (*data.Signed, error)
  • func (tr TufRepo) TargetDelegations(role, path, pathHex string) []*data.Role
  • func (tr TufRepo) TargetMeta(role, path string) *data.FileMeta
  • func (tr *TufRepo) UpdateDelegations(role *data.Role, keys []data.Key, before string) error
  • func (tr *TufRepo) UpdateSnapshot(role string, s *data.Signed) error
  • func (tr *TufRepo) UpdateTimestamp(s *data.Signed) error

Types

type ErrLocalRootExpired

type ErrLocalRootExpired struct{}

func (ErrLocalRootExpired) Error

func (e ErrLocalRootExpired) Error() string

type ErrMetaExpired

type ErrMetaExpired struct{}

func (ErrMetaExpired) Error

func (e ErrMetaExpired) Error() string

type ErrNotLoaded

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

func (*ErrNotLoaded) Error

func (err *ErrNotLoaded) Error() string

type ErrSigVerifyFail

type ErrSigVerifyFail struct{}

func (ErrSigVerifyFail) Error

func (e ErrSigVerifyFail) Error() string

type TufRepo

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

TufRepo 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 TufRepo are responsible for fetching raw JSON and using the Set* functions to populate the TufRepo instance.

func NewTufRepo

func NewTufRepo(keysDB *keys.KeyDB, signer *signed.Signer) *TufRepo

NewTufRepo initializes a TufRepo instance with a keysDB and a signer. If the TufRepo will only be used for reading, the signer should be nil.

func (*TufRepo) AddBaseKeys

func (tr *TufRepo) AddBaseKeys(role string, keys ...data.Key) error

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

func (*TufRepo) AddTargets

func (tr *TufRepo) AddTargets(role string, targets data.Files) (data.Files, error)

AddTargets will attempt to add the given targets specifically to the directed role. If the user does not have the signing keys for the role the function will return an error and the full slice of targets.

func (TufRepo) FindTarget

func (tr TufRepo) FindTarget(path string) *data.FileMeta

FindTarget attempts to find the target represented by the given path by starting at the top targets file and traversing appropriate delegations until the first entry is found or it runs out of locations to search. N.B. Multiple entries may exist in different delegated roles

for the same target. Only the first one encountered is returned.

func (*TufRepo) InitRepo

func (tr *TufRepo) InitRepo(consistent bool) error

InitRepo creates the base files for a repo. It inspects data.ValidRoles and data.ValidTypes to determine what the role names and filename should be. It also relies on the keysDB having already been populated with the keys and roles.

func (*TufRepo) RemoveBaseKeys

func (tr *TufRepo) RemoveBaseKeys(role string, keyIDs ...string) error

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

func (*TufRepo) RemoveTargets

func (tr *TufRepo) RemoveTargets(role string, targets ...string) error

func (*TufRepo) SetRoot

func (tr *TufRepo) SetRoot(s *data.Signed) error

SetRoot parses the Signed object into a SignedRoot object, sets the keys and roles in the KeyDB, and sets the TufRepo.Root field to the SignedRoot object.

func (*TufRepo) SetSnapshot

func (tr *TufRepo) SetSnapshot(s *data.Signed) error

SetSnapshot parses the Signed object into a SignedSnapshots object and sets the TufRepo.Snapshot field.

func (*TufRepo) SetTargets

func (tr *TufRepo) SetTargets(role string, s *data.Signed) error

SetTargets parses the Signed object into a SignedTargets object, reads the delegated roles and keys into the KeyDB, and sets the SignedTargets object agaist the role in the TufRepo.Targets map.

func (*TufRepo) SetTimestamp

func (tr *TufRepo) SetTimestamp(s *data.Signed) error

SetTimestamp parses the Signed object into a SignedTimestamp object and sets the TufRepo.Timestamp field.

func (*TufRepo) SignRoot

func (tr *TufRepo) SignRoot(expires time.Time) (*data.Signed, error)

func (*TufRepo) SignSnapshot

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

func (*TufRepo) SignTargets

func (tr *TufRepo) SignTargets(role string, expires time.Time) (*data.Signed, error)

func (*TufRepo) SignTimestamp

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

func (TufRepo) TargetDelegations

func (tr TufRepo) TargetDelegations(role, path, pathHex string) []*data.Role

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

func (TufRepo) TargetMeta

func (tr TufRepo) TargetMeta(role, 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 (*TufRepo) UpdateDelegations

func (tr *TufRepo) UpdateDelegations(role *data.Role, keys []data.Key, before string) error

UpdateDelegations 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. The "before" argument specifies another role which this new role will be added in front of (i.e. higher priority) in the delegation list. An empty before string indicates to add the role to the end of the delegation list. A new, empty, targets file will be created for the new role.

func (*TufRepo) UpdateSnapshot

func (tr *TufRepo) UpdateSnapshot(role string, s *data.Signed) error

func (*TufRepo) UpdateTimestamp

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