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Merge pull request #1496 from micro/namespace

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Configurable Namespace & Public Suffix Domain Resolution
This commit is contained in:
ben-toogood 2020-04-08 13:48:50 +01:00 committed by GitHub
commit c5d085cff8
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8 changed files with 38 additions and 221 deletions
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181
api/server/auth/auth.go
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@ -1,181 +0,0 @@
package auth
import (
"context"
"fmt"
"net"
"net/http"
"net/url"
"strings"
"github.com/micro/go-micro/v2/api/resolver"
"github.com/micro/go-micro/v2/api/resolver/path"
"github.com/micro/go-micro/v2/auth"
"github.com/micro/go-micro/v2/logger"
)
// CombinedAuthHandler wraps a server and authenticates requests
func CombinedAuthHandler(namespace string, r resolver.Resolver, h http.Handler) http.Handler {
if r == nil {
r = path.NewResolver()
}
if len(namespace) == 0 {
namespace = "go.micro"
}
return authHandler{
handler: h,
resolver: r,
auth: auth.DefaultAuth,
namespace: namespace,
}
}
type authHandler struct {
handler http.Handler
auth auth.Auth
resolver resolver.Resolver
namespace string
}
func (h authHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
// Determine the namespace
namespace, err := namespaceFromRequest(req)
if err != nil {
logger.Error(err)
namespace = auth.DefaultNamespace
}
// Set the namespace in the header
req.Header.Set(auth.NamespaceKey, namespace)
// Extract the token from the request
var token string
if header := req.Header.Get("Authorization"); len(header) > 0 {
// Extract the auth token from the request
if strings.HasPrefix(header, auth.BearerScheme) {
token = header[len(auth.BearerScheme):]
}
} else {
// Get the token out the cookies if not provided in headers
if c, err := req.Cookie("micro-token"); err == nil && c != nil {
token = strings.TrimPrefix(c.Value, auth.TokenCookieName+"=")
req.Header.Set("Authorization", auth.BearerScheme+token)
}
}
// Get the account using the token, fallback to a blank account
// since some endpoints can be unauthenticated, so the lack of an
// account doesn't necesserially mean a forbidden request
acc, err := h.auth.Inspect(token)
if err != nil {
acc = &auth.Account{Namespace: namespace}
}
// Check the accounts namespace matches the namespace we're operating
// within. If not forbid the request and log the occurance.
if acc.Namespace != namespace {
logger.Debugf("Cross namespace request warning: account %v (%v) requested access to %v in the %v namespace", acc.ID, acc.Namespace, req.URL.Path, namespace)
// http.Error(w, "Forbidden namespace", 403)
}
// Determine the name of the service being requested
endpoint, err := h.resolver.Resolve(req)
if err == resolver.ErrInvalidPath || err == resolver.ErrNotFound {
// a file not served by the resolver has been requested (e.g. favicon.ico)
endpoint = &resolver.Endpoint{Path: req.URL.Path}
} else if err != nil {
logger.Error(err)
http.Error(w, err.Error(), 500)
return
} else {
// set the endpoint in the context so it can be used to resolve
// the request later
ctx := context.WithValue(req.Context(), resolver.Endpoint{}, endpoint)
*req = *req.Clone(ctx)
}
// construct the resource name, e.g. home => go.micro.web.home
resName := h.namespace
if len(endpoint.Name) > 0 {
resName = resName + "." + endpoint.Name
}
// determine the resource path. there is an inconsistency in how resolvers
// use method, some use it as Users.ReadUser (the rpc method), and others
// use it as the HTTP method, e.g GET. TODO: Refactor this to make it consistent.
resEndpoint := endpoint.Path
if len(endpoint.Path) == 0 {
resEndpoint = endpoint.Method
}
// Perform the verification check to see if the account has access to
// the resource they're requesting
res := &auth.Resource{Type: "service", Name: resName, Endpoint: resEndpoint, Namespace: namespace}
if err := h.auth.Verify(acc, res); err == nil {
// The account has the necessary permissions to access the resource
h.handler.ServeHTTP(w, req)
return
}
// The account is set, but they don't have enough permissions, hence
// we return a forbidden error.
if len(acc.ID) > 0 {
http.Error(w, "Forbidden request", 403)
return
}
// If there is no auth login url set, 401
loginURL := h.auth.Options().LoginURL
if loginURL == "" {
http.Error(w, "unauthorized request", 401)
return
}
// Redirect to the login path
params := url.Values{"redirect_to": {req.URL.Path}}
loginWithRedirect := fmt.Sprintf("%v?%v", loginURL, params.Encode())
http.Redirect(w, req, loginWithRedirect, http.StatusTemporaryRedirect)
}
func namespaceFromRequest(req *http.Request) (string, error) {
// needed to tmp debug host in prod. will be removed.
logger.Infof("Host is '%v'; URL Host is '%v'; URL Hostname is '%v'", req.Host, req.URL.Host, req.URL.Hostname())
// determine the host, e.g. dev.micro.mu:8080
host := req.URL.Hostname()
if len(host) == 0 {
// fallback to req.Host
var err error
host, _, err = net.SplitHostPort(req.Host)
if err != nil && strings.Contains(err.Error(), "missing port in address") {
host = req.Host
}
}
// check for an ip address
if net.ParseIP(host) != nil {
return auth.DefaultNamespace, nil
}
// check for dev enviroment
if host == "localhost" || host == "127.0.0.1" {
return auth.DefaultNamespace, nil
}
// TODO: this logic needs to be replaced with usage of publicsuffix
// if host is not a subdomain, deturn default namespace
comps := strings.Split(host, ".")
if len(comps) != 3 {
return auth.DefaultNamespace, nil
}
// check for the micro.mu domain
domain := fmt.Sprintf("%v.%v", comps[1], comps[2])
if domain == "micro.mu" {
return auth.DefaultNamespace, nil
}
// return the subdomain as the host
return comps[0], nil
}

7
api/server/http/http.go
View File

@ -10,7 +10,6 @@ import (
"github.com/gorilla/handlers"
"github.com/micro/go-micro/v2/api/server"
"github.com/micro/go-micro/v2/api/server/auth"
"github.com/micro/go-micro/v2/api/server/cors"
"github.com/micro/go-micro/v2/logger"
)
@ -53,7 +52,11 @@ func (s *httpServer) Init(opts ...server.Option) error {
func (s *httpServer) Handle(path string, handler http.Handler) {
h := handlers.CombinedLoggingHandler(os.Stdout, handler)
h = auth.CombinedAuthHandler(s.opts.Namespace, s.opts.Resolver, handler)
// apply the wrappers, e.g. auth
for _, wrapper := range s.opts.Wrappers {
h = wrapper(h)
}
if s.opts.EnableCORS {
h = cors.CombinedCORSHandler(h)

17
api/server/options.go
View File

@ -2,6 +2,7 @@ package server
import (
"crypto/tls"
"net/http"
"github.com/micro/go-micro/v2/api/resolver"
"github.com/micro/go-micro/v2/api/server/acme"
@ -16,8 +17,16 @@ type Options struct {
EnableTLS bool
ACMEHosts []string
TLSConfig *tls.Config
Namespace string
Resolver resolver.Resolver
Wrappers []Wrapper
}
type Wrapper func(h http.Handler) http.Handler
func WrapHandler(w Wrapper) Option {
return func(o *Options) {
o.Wrappers = append(o.Wrappers, w)
}
}
func EnableCORS(b bool) Option {
@ -56,12 +65,6 @@ func TLSConfig(t *tls.Config) Option {
}
}
func Namespace(n string) Option {
return func(o *Options) {
o.Namespace = n
}
}
func Resolver(r resolver.Resolver) Option {
return func(o *Options) {
o.Resolver = r

2
auth/auth.go
View File

@ -89,7 +89,7 @@ type Token struct {
const (
// DefaultNamespace used for auth
DefaultNamespace = "micro"
DefaultNamespace = "go.micro"
// NamespaceKey is the key used when storing the namespace in metadata
NamespaceKey = "Micro-Namespace"
// MetadataKey is the key used when storing the account in metadata

9
auth/options.go
View File

@ -8,6 +8,8 @@ import (
)
type Options struct {
// Namespace the service belongs to
Namespace string
// ID is the services auth ID
ID string
// Secret is used to authenticate the service
@ -28,6 +30,13 @@ type Options struct {
type Option func(o *Options)
// Namespace the service belongs to
func Namespace(n string) Option {
return func(o *Options) {
o.Namespace = n
}
}
// Store to back auth
func Store(s store.Store) Option {
return func(o *Options) {

12
auth/service/service.go
View File

@ -158,6 +158,11 @@ func (s *svc) Revoke(role string, res *auth.Resource) error {
// Verify an account has access to a resource
func (s *svc) Verify(acc *auth.Account, res *auth.Resource) error {
// set the namespace on the resource
if len(res.Namespace) == 0 {
res.Namespace = s.Options().Namespace
}
queries := [][]string{
{res.Namespace, res.Type, res.Name, res.Endpoint}, // check for specific role, e.g. service.foo.ListFoo:admin (role is checked in accessForRule)
{res.Namespace, res.Type, res.Name, "*"}, // check for wildcard endpoint, e.g. service.foo*
@ -205,16 +210,15 @@ func (s *svc) Verify(acc *auth.Account, res *auth.Resource) error {
func (s *svc) Inspect(token string) (*auth.Account, error) {
// try to decode JWT locally and fall back to srv if an error occurs
if len(strings.Split(token, ".")) == 3 && s.jwt != nil {
if acc, err := s.jwt.Inspect(token); err == nil {
return acc, nil
}
return s.jwt.Inspect(token)
}
// the token is not a JWT or we do not have the keys to decode it,
// fall back to the auth service
rsp, err := s.auth.Inspect(context.TODO(), &pb.InspectRequest{Token: token})
if err != nil {
return nil, err
}
return serializeAccount(rsp.Account), nil
}

1
go.sum
View File

@ -546,6 +546,7 @@ golang.org/x/net v0.0.0-20191027093000-83d349e8ac1a/go.mod h1:z5CRVTTTmAJ677TzLL
golang.org/x/net v0.0.0-20191126235420-ef20fe5d7933/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200222125558-5a598a2470a0 h1:MsuvTghUPjX762sGLnGsxC3HM0B5r83wEtYcYR8/vRs=
golang.org/x/net v0.0.0-20200222125558-5a598a2470a0/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e h1:3G+cUijn7XD+S4eJFddp53Pv7+slrESplyjG25HgL+k=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=

24
util/wrapper/wrapper.go
View File

@ -9,7 +9,6 @@ import (
"github.com/micro/go-micro/v2/debug/stats"
"github.com/micro/go-micro/v2/debug/trace"
"github.com/micro/go-micro/v2/errors"
"github.com/micro/go-micro/v2/logger"
"github.com/micro/go-micro/v2/metadata"
"github.com/micro/go-micro/v2/server"
)
@ -145,11 +144,6 @@ func AuthHandler(fn func() auth.Auth) server.HandlerWrapper {
return h(ctx, req, rsp)
}
// Check for auth service endpoints which should be excluded from auth
if strings.HasPrefix(req.Endpoint(), "Auth.") {
return h(ctx, req, rsp)
}
// Extract the token if present. Note: if noop is being used
// then the token can be blank without erroring
var token string
@ -162,25 +156,10 @@ func AuthHandler(fn func() auth.Auth) server.HandlerWrapper {
token = header[len(auth.BearerScheme):]
}
// Get the namespace for the request
namespace, ok := metadata.Get(ctx, auth.NamespaceKey)
if !ok {
logger.Debugf("Missing request namespace")
namespace = auth.DefaultNamespace
}
// Inspect the token and get the account
account, err := a.Inspect(token)
if err != nil {
account = &auth.Account{Namespace: namespace}
}
// Check the accounts namespace matches the namespace we're operating
// within. If not forbid the request and log the occurance.
if account.Namespace != namespace {
logger.Debugf("Cross namespace request forbidden: account %v (%v) requested access to %v %v in the %v namespace",
account.ID, account.Namespace, req.Service(), req.Endpoint(), namespace)
// return errors.Forbidden(req.Service(), "cross namespace request")
account = &auth.Account{}
}
// construct the resource
@ -188,7 +167,6 @@ func AuthHandler(fn func() auth.Auth) server.HandlerWrapper {
Type: "service",
Name: req.Service(),
Endpoint: req.Endpoint(),
Namespace: namespace,
}
// Verify the caller has access to the resource