connector

Documentation

Overview

Package connector defines interfaces for federated identity strategies.

Index

• type CallbackConnector
• type Connector
• type Identity
• type PasswordConnector
• type RefreshConnector
• type SAMLConnector
• type Scopes

Types

type CallbackConnector

type CallbackConnector interface {
	// The initial URL to redirect the user to.
	//
	// OAuth2 implementations should request different scopes from the upstream
	// identity provider based on the scopes requested by the downstream client.
	// For example, if the downstream client requests a refresh token from the
	// server, the connector should also request a token from the provider.
	//
	// Many identity providers have arbitrary restrictions on refresh tokens. For
	// example Google only allows a single refresh token per client/user/scopes
	// combination, and wont return a refresh token even if offline access is
	// requested if one has already been issues. There's no good general answer
	// for these kind of restrictions, and may require this package to become more
	// aware of the global set of user/connector interactions.
	LoginURL(s Scopes, callbackURL, state string) (string, error)

	// Handle the callback to the server and return an identity.
	HandleCallback(s Scopes, r *http.Request) (identity Identity, err error)
}

CallbackConnector is an interface implemented by connectors which use an OAuth style redirect flow to determine user information.

type Connector

type Connector interface{}

Connector is a mechanism for federating login to a remote identity service.

Implementations are expected to implement either the PasswordConnector or CallbackConnector interface.

type Identity

type Identity struct {
	UserID        string
	Username      string
	Email         string
	EmailVerified bool

	Groups []string

	// ConnectorData holds data used by the connector for subsequent requests after initial
	// authentication, such as access tokens for upstream provides.
	//
	// This data is never shared with end users, OAuth clients, or through the API.
	ConnectorData []byte
}

Identity represents the ID Token claims supported by the server.

type PasswordConnector

type PasswordConnector interface {
	Prompt() string
	Login(ctx context.Context, s Scopes, username, password string) (identity Identity, validPassword bool, err error)
}

PasswordConnector is an interface implemented by connectors which take a username and password. Prompt() is used to inform the handler what to display in the password template. If this returns an empty string, it'll default to "Username".

type RefreshConnector

type RefreshConnector interface {
	// Refresh is called when a client attempts to claim a refresh token. The
	// connector should attempt to update the identity object to reflect any
	// changes since the token was last refreshed.
	Refresh(ctx context.Context, s Scopes, identity Identity) (Identity, error)
}

RefreshConnector is a connector that can update the client claims.

type SAMLConnector

type SAMLConnector interface {
	// POSTData returns an encoded SAML request and SSO URL for the server to
	// render a POST form with.
	//
	// POSTData should encode the provided request ID in the returned serialized
	// SAML request.
	POSTData(s Scopes, requestID string) (sooURL, samlRequest string, err error)

	// HandlePOST decodes, verifies, and maps attributes from the SAML response.
	// It passes the expected value of the "InResponseTo" response field, which
	// the connector must ensure matches the response value.
	//
	// See: https://www.oasis-open.org/committees/download.php/35711/sstc-saml-core-errata-2.0-wd-06-diff.pdf
	// "3.2.2 Complex Type StatusResponseType"
	HandlePOST(s Scopes, samlResponse, inResponseTo string) (identity Identity, err error)
}

SAMLConnector represents SAML connectors which implement the HTTP POST binding.

RelayState is handled by the server.

See: https://docs.oasis-open.org/security/saml/v2.0/saml-bindings-2.0-os.pdf "3.5 HTTP POST Binding"

type Scopes

type Scopes struct {
	// The client has requested a refresh token from the server.
	OfflineAccess bool

	// The client has requested group information about the end user.
	Groups bool
}

Scopes represents additional data requested by the clients about the end user.