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dex/client/client.go

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2015-08-18 05:57:27 +05:30
package client
import (
"encoding/base64"
"encoding/json"
"errors"
"io"
"io/ioutil"
"net/url"
"reflect"
"sort"
pcrypto "github.com/coreos/dex/pkg/crypto"
"github.com/coreos/go-oidc/oidc"
)
var (
ErrorInvalidRedirectURL = errors.New("not a valid redirect url for the given client")
ErrorCantChooseRedirectURL = errors.New("must provide a redirect url; client has many")
ErrorNoValidRedirectURLs = errors.New("no valid redirect URLs for this client.")
ErrorNotFound = errors.New("no data found")
)
type ClientIdentityRepo interface {
// Metadata returns one matching ClientMetadata if the given client
// exists, otherwise nil. The returned error will be non-nil only
// if the repo was unable to determine client existence.
Metadata(clientID string) (*oidc.ClientMetadata, error)
// Authenticate asserts that a client with the given ID exists and
// that the provided secret matches. If either of these assertions
// fail, (false, nil) will be returned. Only if the repo is unable
// to make these assertions will a non-nil error be returned.
Authenticate(creds oidc.ClientCredentials) (bool, error)
// All returns all registered Client Identities.
All() ([]oidc.ClientIdentity, error)
// New registers a ClientIdentity with the repo for the given metadata.
// An unused ID must be provided. A corresponding secret will be returned
// in a ClientCredentials struct along with the provided ID.
New(id string, meta oidc.ClientMetadata) (*oidc.ClientCredentials, error)
SetDexAdmin(clientID string, isAdmin bool) error
IsDexAdmin(clientID string) (bool, error)
}
func NewClientIdentityRepo(cs []oidc.ClientIdentity) ClientIdentityRepo {
cr := memClientIdentityRepo{
idents: make(map[string]oidc.ClientIdentity, len(cs)),
admins: make(map[string]bool),
}
for _, c := range cs {
c := c
cr.idents[c.Credentials.ID] = c
}
return &cr
}
type memClientIdentityRepo struct {
idents map[string]oidc.ClientIdentity
admins map[string]bool
}
func (cr *memClientIdentityRepo) New(id string, meta oidc.ClientMetadata) (*oidc.ClientCredentials, error) {
if _, ok := cr.idents[id]; ok {
return nil, errors.New("client ID already exists")
}
secret, err := pcrypto.RandBytes(32)
if err != nil {
return nil, err
}
cc := oidc.ClientCredentials{
ID: id,
Secret: base64.URLEncoding.EncodeToString(secret),
}
cr.idents[id] = oidc.ClientIdentity{
Metadata: meta,
Credentials: cc,
}
return &cc, nil
}
func (cr *memClientIdentityRepo) Metadata(clientID string) (*oidc.ClientMetadata, error) {
ci, ok := cr.idents[clientID]
if !ok {
return nil, ErrorNotFound
}
return &ci.Metadata, nil
}
func (cr *memClientIdentityRepo) Authenticate(creds oidc.ClientCredentials) (bool, error) {
ci, ok := cr.idents[creds.ID]
ok = ok && ci.Credentials.Secret == creds.Secret
return ok, nil
}
func (cr *memClientIdentityRepo) All() ([]oidc.ClientIdentity, error) {
cs := make(sortableClientIdentities, 0, len(cr.idents))
for _, ci := range cr.idents {
ci := ci
cs = append(cs, ci)
}
sort.Sort(cs)
return cs, nil
}
func (cr *memClientIdentityRepo) SetDexAdmin(clientID string, isAdmin bool) error {
cr.admins[clientID] = isAdmin
return nil
}
func (cr *memClientIdentityRepo) IsDexAdmin(clientID string) (bool, error) {
return cr.admins[clientID], nil
}
type sortableClientIdentities []oidc.ClientIdentity
func (s sortableClientIdentities) Len() int {
return len([]oidc.ClientIdentity(s))
}
func (s sortableClientIdentities) Less(i, j int) bool {
return s[i].Credentials.ID < s[j].Credentials.ID
}
func (s sortableClientIdentities) Swap(i, j int) {
s[i], s[j] = s[j], s[i]
}
func NewClientIdentityRepoFromReader(r io.Reader) (ClientIdentityRepo, error) {
b, err := ioutil.ReadAll(r)
if err != nil {
return nil, err
}
var cs []clientIdentity
if err = json.Unmarshal(b, &cs); err != nil {
return nil, err
}
ocs := make([]oidc.ClientIdentity, len(cs))
for i, c := range cs {
ocs[i] = oidc.ClientIdentity(c)
}
return NewClientIdentityRepo(ocs), nil
}
type clientIdentity oidc.ClientIdentity
func (ci *clientIdentity) UnmarshalJSON(data []byte) error {
c := struct {
ID string `json:"id"`
Secret string `json:"secret"`
RedirectURLs []string `json:"redirectURLs"`
}{}
if err := json.Unmarshal(data, &c); err != nil {
return err
}
ci.Credentials = oidc.ClientCredentials{
ID: c.ID,
Secret: c.Secret,
}
ci.Metadata = oidc.ClientMetadata{
RedirectURLs: make([]url.URL, len(c.RedirectURLs)),
}
for i, us := range c.RedirectURLs {
up, err := url.Parse(us)
if err != nil {
return err
}
ci.Metadata.RedirectURLs[i] = *up
}
return nil
}
// ValidRedirectURL returns the passed in URL if it is present in the redirectURLs list, and returns an error otherwise.
// If nil is passed in as the rURL and there is only one URL in redirectURLs,
// that URL will be returned. If nil is passed but theres >1 URL in the slice,
// then an error is returned.
func ValidRedirectURL(rURL *url.URL, redirectURLs []url.URL) (url.URL, error) {
if len(redirectURLs) == 0 {
return url.URL{}, ErrorNoValidRedirectURLs
}
if rURL == nil {
if len(redirectURLs) > 1 {
return url.URL{}, ErrorCantChooseRedirectURL
}
return redirectURLs[0], nil
}
for _, ru := range redirectURLs {
if reflect.DeepEqual(ru, *rURL) {
return ru, nil
}
}
return url.URL{}, ErrorInvalidRedirectURL
}