authdb

package
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 Go to latest Published: Jun 28, 2019 License: Apache-2.0 Imports: 17 Imported by: 0

Documentation

Overview

Package authdb contains definition of Authentication Database (aka AuthDB).

Authentication Database represents all data used when authorizing incoming requests and handling authentication related tasks: user groups, IP whitelists, OAuth client ID whitelist, etc.

This package defines a general interface and few its implementations.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func NewDBCache 

func NewDBCache(updater DBCacheUpdater) func(c context.Context) (DB, error)

NewDBCache returns a provider of DB instances that uses local memory to cache DB instances for 5-10 seconds. It uses supplied callback to refetch DB from some permanent storage when cache expires.

Even though the return value is technically a function, treat it as a heavy stateful object, since it has the cache of DB in its closure.

func Revision 

func Revision(db DB) int64

Revision returns a revision of an auth DB or 0 if it can't be determined.

It's just a small helper that casts db to *SnapshotDB and extracts the revision from there.

Types

type DB 

type DB interface {
	// IsAllowedOAuthClientID returns true if given OAuth2 client_id can be used
	// to authenticate access for given email.
	IsAllowedOAuthClientID(c context.Context, email, clientID string) (bool, error)

	// IsInternalService returns true if the given hostname belongs to a service
	// that is a part of the current LUCI deployment.
	//
	// What hosts are internal is controlled by 'internal_service_regexp' setting
	// in security.cfg in the Auth Service configs.
	IsInternalService(c context.Context, hostname string) (bool, error)

	// IsMember returns true if the given identity belongs to any of the groups.
	//
	// Unknown groups are considered empty. May return errors if underlying
	// datastore has issues.
	IsMember(c context.Context, id identity.Identity, groups []string) (bool, error)

	// CheckMembership returns groups from the given list the identity belongs to.
	//
	// Unlike IsMember, it doesn't stop on the first hit but continues evaluating
	// all groups.
	//
	// Unknown groups are considered empty. The order of groups in the result may
	// be different from the order in 'groups'.
	//
	// May return errors if underlying datastore has issues.
	CheckMembership(c context.Context, id identity.Identity, groups []string) ([]string, error)

	// GetCertificates returns a bundle with certificates of a trusted signer.
	//
	// Returns (nil, nil) if the given signer is not trusted.
	//
	// Returns errors (usually transient) if the bundle can't be fetched.
	GetCertificates(c context.Context, id identity.Identity) (*signing.PublicCertificates, error)

	// GetWhitelistForIdentity returns name of the IP whitelist to use to check
	// IP of requests from given `ident`.
	//
	// It's used to restrict access for certain account to certain IP subnets.
	//
	// Returns ("", nil) if `ident` is not IP restricted.
	GetWhitelistForIdentity(c context.Context, ident identity.Identity) (string, error)

	// IsInWhitelist returns true if IP address belongs to given named
	// IP whitelist.
	//
	// IP whitelist is a set of IP subnets. Unknown IP whitelists are considered
	// empty. May return errors if underlying datastore has issues.
	IsInWhitelist(c context.Context, ip net.IP, whitelist string) (bool, error)

	// GetAuthServiceURL returns root URL ("https://<host>") of the auth service.
	//
	// Returns an error if the DB implementation is not using an auth service.
	GetAuthServiceURL(c context.Context) (string, error)

	// GetTokenServiceURL returns root URL ("https://<host>") of the token server.
	//
	// Returns an error if the DB implementation doesn't know how to retrieve it.
	//
	// Returns ("", nil) if the token server URL is not configured.
	GetTokenServiceURL(c context.Context) (string, error)
}

DB is interface to access a database of authorization related information.

It is static read only object that represent snapshot of auth data at some moment in time.

type DBCacheUpdater 

type DBCacheUpdater func(c context.Context, prev DB) (DB, error)

DBCacheUpdater knows how to update local in-memory copy of DB.

Used by NewDBCache.

type DevServerDB 

type DevServerDB struct{}

DevServerDB implements authdb.DB by allowing everything.

It can be used locally during development to skip fully configuring auth. Must not be used for real production applications.

func (DevServerDB) CheckMembership 

func (DevServerDB) CheckMembership(c context.Context, id identity.Identity, groups []string) ([]string, error)

func (DevServerDB) GetAuthServiceURL 

func (DevServerDB) GetAuthServiceURL(c context.Context) (string, error)

func (DevServerDB) GetCertificates 

func (DevServerDB) GetCertificates(c context.Context, id identity.Identity) (*signing.PublicCertificates, error)

func (DevServerDB) GetTokenServiceURL 

func (DevServerDB) GetTokenServiceURL(c context.Context) (string, error)

func (DevServerDB) GetWhitelistForIdentity 

func (DevServerDB) GetWhitelistForIdentity(c context.Context, ident identity.Identity) (string, error)

func (DevServerDB) IsAllowedOAuthClientID 

func (DevServerDB) IsAllowedOAuthClientID(c context.Context, email, clientID string) (bool, error)

func (DevServerDB) IsInWhitelist 

func (DevServerDB) IsInWhitelist(c context.Context, ip net.IP, whitelist string) (bool, error)

func (DevServerDB) IsInternalService 

func (DevServerDB) IsInternalService(c context.Context, hostname string) (bool, error)

func (DevServerDB) IsMember 

func (DevServerDB) IsMember(c context.Context, id identity.Identity, groups []string) (bool, error)

type ErroringDB 

type ErroringDB struct {
	Error error // returned by all calls
}

ErroringDB implements DB by forbidding all access and returning errors.

func (ErroringDB) CheckMembership 

func (db ErroringDB) CheckMembership(c context.Context, id identity.Identity, groups []string) ([]string, error)

CheckMembership returns groups from the given list the identity belongs to.

func (ErroringDB) GetAuthServiceURL 

func (db ErroringDB) GetAuthServiceURL(c context.Context) (string, error)

GetAuthServiceURL returns root URL ("https://<host>") of the auth service.

func (ErroringDB) GetCertificates 

func (db ErroringDB) GetCertificates(c context.Context, id identity.Identity) (*signing.PublicCertificates, error)

GetCertificates returns a bundle with certificates of a trusted signer.

func (ErroringDB) GetTokenServiceURL 

func (db ErroringDB) GetTokenServiceURL(c context.Context) (string, error)

GetTokenServiceURL returns root URL ("https://<host>") of the token service.

func (ErroringDB) GetWhitelistForIdentity 

func (db ErroringDB) GetWhitelistForIdentity(c context.Context, ident identity.Identity) (string, error)

GetWhitelistForIdentity returns name of the IP whitelist to use to check IP of requests from given `ident`.

It's used to restrict access for certain account to certain IP subnets.

Returns ("", nil) if `ident` is not IP restricted.

func (ErroringDB) IsAllowedOAuthClientID 

func (db ErroringDB) IsAllowedOAuthClientID(c context.Context, email, clientID string) (bool, error)

IsAllowedOAuthClientID returns true if given OAuth2 client_id can be used to authenticate access for given email.

func (ErroringDB) IsInWhitelist 

func (db ErroringDB) IsInWhitelist(c context.Context, ip net.IP, whitelist string) (bool, error)

IsInWhitelist returns true if IP address belongs to given named IP whitelist.

IP whitelist is a set of IP subnets. Unknown IP whitelists are considered empty. May return errors if underlying datastore has issues.

func (ErroringDB) IsInternalService 

func (db ErroringDB) IsInternalService(c context.Context, hostname string) (bool, error)

IsInternalService returns true if the given hostname belongs to a service that is a part of the current LUCI deployment.

func (ErroringDB) IsMember 

func (db ErroringDB) IsMember(c context.Context, id identity.Identity, groups []string) (bool, error)

IsMember returns true if the given identity belongs to any of the groups.

type SnapshotDB 

type SnapshotDB struct {
	AuthServiceURL string // where it was fetched from
	Rev            int64  // its revision number
	// contains filtered or unexported fields
}

SnapshotDB implements DB using AuthDB proto message.

Use NewSnapshotDB to create new instances. Don't touch public fields of existing instances.

func NewSnapshotDB 

func NewSnapshotDB(authDB *protocol.AuthDB, authServiceURL string, rev int64, validate bool) (*SnapshotDB, error)

NewSnapshotDB creates new instance of SnapshotDB.

It does some preprocessing to speed up subsequent checks. Returns errors if it encounters inconsistencies.

If 'validate' is false, skips some expensive validation steps, assuming they were performed before, when AuthDB was initially received.

func SnapshotDBFromTextProto 

func SnapshotDBFromTextProto(r io.Reader) (*SnapshotDB, error)

SnapshotDBFromTextProto constructs SnapshotDB by loading it from a text proto with AuthDB message.

func (*SnapshotDB) CheckMembership 

func (db *SnapshotDB) CheckMembership(c context.Context, id identity.Identity, groups []string) (out []string, err error)

CheckMembership returns groups from the given list the identity belongs to.

Unlike IsMember, it doesn't stop on the first hit but continues evaluating all groups.

Unknown groups are considered empty. The order of groups in the result may be different from the order in 'groups'.

May return errors if underlying datastore has issues.

func (*SnapshotDB) GetAuthServiceURL 

func (db *SnapshotDB) GetAuthServiceURL(c context.Context) (string, error)

GetAuthServiceURL returns root URL ("https://<host>") of the auth service the snapshot was fetched from.

This is needed to implement authdb.DB interface.

func (*SnapshotDB) GetCertificates 

func (db *SnapshotDB) GetCertificates(c context.Context, signerID identity.Identity) (*signing.PublicCertificates, error)

GetCertificates returns a bundle with certificates of a trusted signer.

func (*SnapshotDB) GetTokenServiceURL 

func (db *SnapshotDB) GetTokenServiceURL(c context.Context) (string, error)

GetTokenServiceURL returns root URL ("https://<host>") of the token server.

This is needed to implement authdb.DB interface.

func (*SnapshotDB) GetWhitelistForIdentity 

func (db *SnapshotDB) GetWhitelistForIdentity(c context.Context, ident identity.Identity) (string, error)

GetWhitelistForIdentity returns name of the IP whitelist to use to check IP of requests from given `ident`.

It's used to restrict access for certain account to certain IP subnets.

Returns ("", nil) if `ident` is not IP restricted.

func (*SnapshotDB) IsAllowedOAuthClientID 

func (db *SnapshotDB) IsAllowedOAuthClientID(c context.Context, email, clientID string) (bool, error)

IsAllowedOAuthClientID returns true if given OAuth2 client_id can be used to authenticate access for given email.

func (*SnapshotDB) IsInWhitelist 

func (db *SnapshotDB) IsInWhitelist(c context.Context, ip net.IP, whitelist string) (bool, error)

IsInWhitelist returns true if IP address belongs to given named IP whitelist.

IP whitelist is a set of IP subnets. Unknown IP whitelists are considered empty. May return errors if underlying datastore has issues.

func (*SnapshotDB) IsInternalService 

func (db *SnapshotDB) IsInternalService(c context.Context, hostname string) (bool, error)

IsInternalService returns true if the given hostname belongs to a service that is a part of the current LUCI deployment.

What hosts are internal is controlled by 'internal_service_regexp' setting in security.cfg in the Auth Service configs.

func (*SnapshotDB) IsMember 

func (db *SnapshotDB) IsMember(c context.Context, id identity.Identity, groups []string) (bool, error)

IsMember returns true if the given identity belongs to any of the groups.

Unknown groups are considered empty. May return errors if underlying datastore has issues.

Source Files

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