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Published: Aug 3, 2021 License: Apache-2.0 Imports: 10 Imported by: 8

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Constants

This section is empty.

Variables

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var Unchanged = errors.New("database contents unchanged")

Unchanged is returned by Fetchers when the database has not changed.

Functions

This section is empty.

Types

type ConfigUnmarshaler

type ConfigUnmarshaler func(interface{}) error

ConfigUnmarshaler can be thought of as an Unmarshal function with the byte slice provided, or a Decode function.

The function should populate a passed struct with any configuration information.

type Configurable

type Configurable interface {
	Configure(context.Context, ConfigUnmarshaler, *http.Client) error
}

Configurable is an interface that Updaters can implement to opt-in to having their configuration provided dynamically.

type Enricher

type Enricher interface {
	// Name is a unique name for this Enricher.
	//
	// The name preferably indicates the vendor who implemented it and matches
	// the corresponding EnrichmentUpdater.
	Name() string
	// Enrich extracts a set of tags from the provided VulnerabilityReport and utilizes
	// the provided EnrichmentGetter to retrieve any Enrichments associated with the query tags.
	//
	// Enrichers may not modify the passed VulnerabilityReport. Doing so may
	// panic the program.
	//
	// The implemented Enricher returns JSON blobs of Enrichment data and a key
	// explaining to the client how to interpret the data.
	Enrich(context.Context, EnrichmentGetter, *claircore.VulnerabilityReport) (string, []json.RawMessage, error)
}

Enricher is the interface for enriching a vulnerability report.

Enrichers are called after the VulnerabilityReport is constructed.

type EnrichmentGetter

type EnrichmentGetter interface {
	GetEnrichment(context.Context, []string) ([]EnrichmentRecord, error)
}

EnrichmentGetter is a handle to obtain Enrichments with a given tag.

The implementation provided to an Enricher will make use of the Enricher's name to scope down results.

type EnrichmentRecord

type EnrichmentRecord struct {
	Tags       []string
	Enrichment json.RawMessage
}

EnrichmentRecord is a simple container for JSON enrichment data and the tags it will be queried by.

type EnrichmentUpdater

type EnrichmentUpdater interface {
	// Name is a unique name for this updater.
	//
	// The name preferably indicates the vendor who implemented it and the
	// enrichment data source it's fetching and interpreting.
	// This must be paired with an Enricher using the same value.
	Name() string
	// FetchEnrichment should use the provided Fingerprint to determine if
	// there's new data to download, and if so return it in an io.ReadCloser and
	// a new Fingerprint.
	//
	// If there's no new data, the method should report Unchanged.
	FetchEnrichment(context.Context, Fingerprint) (io.ReadCloser, Fingerprint, error)
	// ParseEnrichment reads from the provided io.ReadCloser, parses its contents,
	// and returns a slice of EnrichmentRecords or an error.
	ParseEnrichment(context.Context, io.ReadCloser) ([]EnrichmentRecord, error)
}

EnrichmentUpdater fetches an Enrichment data source, parses its contents, and returns individual EnrichmentRecords.

type ErrExists

type ErrExists struct {
	Updater []string
}

ErrExists is an error returned if the updater already exists in the set.

func (ErrExists) Error

func (e ErrExists) Error() string

type Fetcher

type Fetcher interface {
	Fetch(context.Context, Fingerprint) (io.ReadCloser, Fingerprint, error)
}

Fetcher is an interface which is embedded into the Updater interface.

When called the interface should determine if new security advisory data is available. Fingerprint may be passed into in order for the Fetcher to determine if the contents has changed

If there is new content Fetcher should return a io.ReadCloser where the new content can be read. Optionally a fingerprint can be returned which uniquely identifies the new content.

If the conent has not change an Unchanged error should be returned.

type Fingerprint

type Fingerprint string

Fingerprint is some identifying information about a vulnerability database.

type MatchConstraint

type MatchConstraint int

MatchConstraint explains to the caller how a search for a package's vulnerability should be constrained.

for example if sql implementation encounters a DistributionDID constraint it should create a query similar to "SELECT * FROM vulnerabilities WHERE package_name = ? AND distribution_did = ?"

const (

	// should match claircore.Package.Source.Name => claircore.Vulnerability.Package.Name
	PackageSourceName MatchConstraint
	// should match claircore.Package.Name => claircore.Vulnerability.Package.Name
	PackageName
	// should match claircore.Package.Module => claircore.Vulnerability.Package.Module
	PackageModule
	// should match claircore.Package.Distribution.DID => claircore.Vulnerability.Package.Distribution.DID
	DistributionDID
	// should match claircore.Package.Distribution.Name => claircore.Vulnerability.Package.Distribution.Name
	DistributionName
	// should match claircore.Package.Distribution.Version => claircore.Vulnerability.Package.Distribution.Version
	DistributionVersion
	// should match claircore.Package.Distribution.VersionCodeName => claircore.Vulnerability.Package.Distribution.VersionCodeName
	DistributionVersionCodeName
	// should match claircore.Package.Distribution.VersionID => claircore.Vulnerability.Package.Distribution.VersionID
	DistributionVersionID
	// should match claircore.Package.Distribution.Arch => claircore.Vulnerability.Package.Distribution.Arch
	DistributionArch
	// should match claircore.Package.Distribution.CPE => claircore.Vulnerability.Package.Distribution.CPE
	DistributionCPE
	// should match claircore.Package.Distribution.PrettyName => claircore.Vulnerability.Package.Distribution.PrettyName
	DistributionPrettyName
	// should match claircore.Package.Repository.Name => claircore.Vulnerability.Package.Repository.Name
	RepositoryName
)

type Matcher

type Matcher interface {
	// a unique name for the matcher
	Name() string
	// Filter informs the Controller if the implemented Matcher is interested in the provided IndexRecord.
	Filter(record *claircore.IndexRecord) bool
	// Query informs the Controller how it should match packages with vulnerabilities.
	// All conditions are logical AND'd together.
	Query() []MatchConstraint
	// Vulnerable informs the Controller if the given package is affected by the given vulnerability.
	// for example checking the "FixedInVersion" field.
	Vulnerable(ctx context.Context, record *claircore.IndexRecord, vuln *claircore.Vulnerability) (bool, error)
}

Matcher is an interface which a Controller uses to query the vulnstore for vulnerabilities.

type MatcherConfigUnmarshaler

type MatcherConfigUnmarshaler func(interface{}) error

MatcherConfigUnmarshaler can be thought of as an Unmarshal function with the byte slice provided, or a Decode function.

The function should populate a passed struct with any configuration information.

type MatcherConfigurable

type MatcherConfigurable interface {
	Configure(context.Context, MatcherConfigUnmarshaler, *http.Client) error
}

MatcherConfigurable is an interface that MatcherFactory can implement to opt-in to having their configuration provided dynamically.

type MatcherFactory

type MatcherFactory interface {
	Matcher(context.Context) ([]Matcher, error)
}

MatcherFactory is used to construct matchers at run-time.

func MatcherStatic

func MatcherStatic(s Matcher) MatcherFactory

MatcherStatic creates an MatcherFactoryFunc returning the provided matcher.

type MatcherFactoryFunc

type MatcherFactoryFunc func(context.Context) ([]Matcher, error)

MatcherFactoryFunc would ease the registration of Matchers which don't need Configurability.

func (MatcherFactoryFunc) Matcher

func (u MatcherFactoryFunc) Matcher(ctx context.Context) ([]Matcher, error)

type NoopUpdater

type NoopUpdater struct{}

NoopUpdater is designed to be embedded into other Updater types so they can be used in the original updater machinery.

This may go away if the Updater interface becomes Vulnerability agnostic in the future.

func (NoopUpdater) Fetch

Fetch implements Updater.

func (NoopUpdater) Parse

Parse implements Updater.

type Parser

type Parser interface {
	// Parse should take an io.ReadCloser, read the contents, parse the contents
	// into a list of claircore.Vulnerability structs and then return
	// the list. Parse should assume contents are uncompressed and ready for parsing.
	Parse(ctx context.Context, contents io.ReadCloser) ([]*claircore.Vulnerability, error)
}

Parser is an interface which is embedded into the Updater interface.

Parse should be called with an io.ReadCloser struct where the contents of a security advisory database can be read and parsed into an array of *claircore.Vulnerability

type RemoteMatcher

type RemoteMatcher interface {
	QueryRemoteMatcher(ctx context.Context, records []*claircore.IndexRecord) (map[string][]*claircore.Vulnerability, error)
}

The information retrieved from this interface won't be persisted into ClairCore database.

type UpdateDiff

type UpdateDiff struct {
	Prev    UpdateOperation           `json:"prev"`
	Cur     UpdateOperation           `json:"cur"`
	Added   []claircore.Vulnerability `json:"added"`
	Removed []claircore.Vulnerability `json:"removed"`
}

UpdateDiff represents added or removed vulnerabilities between update operations

type UpdateKind

type UpdateKind string
var EnrichmentKind UpdateKind = "enrichment"
var VulnerabilityKind UpdateKind = "vulnerability"

type UpdateOperation

type UpdateOperation struct {
	Ref         uuid.UUID   `json:"ref"`
	Updater     string      `json:"updater"`
	Fingerprint Fingerprint `json:"fingerprint"`
	Date        time.Time   `json:"date"`
	Kind        UpdateKind  `json:"kind"`
}

UpdateOperation is a unique update to the vulnstore by an Updater.

type Updater

type Updater interface {
	Name() string
	Fetcher
	Parser
}

Updater is an aggregate interface combining the method set of a Fetcher and a Parser and forces a Name() to be provided

type UpdaterSet

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

UpdaterSet holds a deduplicated set of updaters.

func NewUpdaterSet

func NewUpdaterSet() UpdaterSet

NewUpdaterSet returns an initialized UpdaterSet.

func (*UpdaterSet) Add

func (s *UpdaterSet) Add(u Updater) error

Add will add an Updater to the set.

An error will be reported if an updater with the same name already exists.

func (*UpdaterSet) Merge

func (s *UpdaterSet) Merge(set UpdaterSet) error

Merge will merge the UpdaterSet provided as argument into the UpdaterSet provided as the function receiver.

If an updater exists in the target set an error specifying which updaters could not be merged is returned.

func (*UpdaterSet) RegexFilter

func (s *UpdaterSet) RegexFilter(regex string) error

RegexFilter will remove any updaters from the set whose reported names do not match the provided regexp string.

func (*UpdaterSet) Updaters

func (s *UpdaterSet) Updaters() []Updater

Updaters returns the updaters within the set as slice.

type UpdaterSetFactory

type UpdaterSetFactory interface {
	UpdaterSet(context.Context) (UpdaterSet, error)
}

UpdaterSetFactory is used to construct updaters at run-time.

func StaticSet

func StaticSet(s UpdaterSet) UpdaterSetFactory

StaticSet creates an UpdaterSetFunc returning the provided set.

type UpdaterSetFactoryFunc

type UpdaterSetFactoryFunc func(context.Context) (UpdaterSet, error)

func (UpdaterSetFactoryFunc) UpdaterSet

func (u UpdaterSetFactoryFunc) UpdaterSet(ctx context.Context) (UpdaterSet, error)

type VersionFilter

type VersionFilter interface {
	VersionFilter()
	// VersionAuthoritative reports whether the Matcher trusts the database-side
	// filtering to be authoritative.
	//
	// A Matcher may return false if it's using a versioning scheme that can't
	// be completely normalized into a claircore.Version.
	VersionAuthoritative() bool
}

VersionFilter is an additional interface that a Matcher can implment to opt-in to using normalized version information in database queries.

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