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Merge branch 'master' into auth-resolver

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ben-toogood 2020-04-03 14:19:03 +01:00 committed by GitHub
commit 350dd41732
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GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 211 additions and 85 deletions
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66
api/server/auth/auth.go
View File

@ -2,6 +2,7 @@ package auth
import (
"fmt"
"net"
"net/http"
"net/url"
"strings"
@ -9,6 +10,7 @@ import (
"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
@ -36,6 +38,16 @@ type authHandler struct {
}
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 {
@ -56,7 +68,14 @@ func (h authHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
// account doesn't necesserially mean a forbidden request
acc, err := h.auth.Inspect(token)
if err != nil {
acc = &auth.Account{}
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.Warnf("Cross namespace request forbidden: account %v (%v) requested access to %v in the %v namespace", acc.ID, acc.Namespace, req.URL.Path, namespace)
w.WriteHeader(http.StatusForbidden)
}
// Determine the name of the service being requested
@ -85,15 +104,15 @@ func (h authHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
// 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}
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 403.
// The account is set, but they don't have enough permissions, hence
// we return a forbidden error.
if len(acc.ID) > 0 {
w.WriteHeader(http.StatusForbidden)
return
@ -111,3 +130,42 @@ func (h authHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
loginWithRedirect := fmt.Sprintf("%v?%v", loginURL, params.Encode())
http.Redirect(w, req, loginWithRedirect, http.StatusTemporaryRedirect)
}
func namespaceFromRequest(req *http.Request) (string, error) {
// determine the host, e.g. dev.micro.mu:8080
host := req.URL.Host
if len(host) == 0 {
host = req.Host
}
// check for an ip address
if net.ParseIP(host) != nil {
return auth.DefaultNamespace, nil
}
// split the host to remove the port
host, _, err := net.SplitHostPort(req.Host)
if err != nil {
return "", err
}
// check for dev enviroment
if host == "localhost" || host == "127.0.0.1" {
return auth.DefaultNamespace, nil
}
// 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
}

18
auth/auth.go
View File

@ -21,8 +21,6 @@ var (
ErrInvalidRole = errors.New("invalid role")
// ErrForbidden is returned when a user does not have the necessary roles to access a resource
ErrForbidden = errors.New("resource forbidden")
// BearerScheme used for Authorization header
BearerScheme = "Bearer "
)
// Auth providers authentication and authorization
@ -50,11 +48,13 @@ type Auth interface {
// Resource is an entity such as a user or
type Resource struct {
// Name of the resource
Name string
Name string `json:"name"`
// Type of resource, e.g.
Type string
Type string `json:"type"`
// Endpoint resource e.g NotesService.Create
Endpoint string
Endpoint string `json:"endpoint"`
// Namespace the resource belongs to
Namespace string `json:"namespace"`
}
// Account provided by an auth provider
@ -69,7 +69,7 @@ type Account struct {
Roles []string `json:"roles"`
// Any other associated metadata
Metadata map[string]string `json:"metadata"`
// Namespace the account belongs to, default blank
// Namespace the account belongs to
Namespace string `json:"namespace"`
// Secret for the account, e.g. the password
Secret string `json:"secret"`
@ -88,12 +88,18 @@ type Token struct {
}
const (
// DefaultNamespace used for auth
DefaultNamespace = "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
MetadataKey = "auth-account"
// TokenCookieName is the name of the cookie which stores the auth token
TokenCookieName = "micro-token"
// SecretCookieName is the name of the cookie which stores the auth secret
SecretCookieName = "micro-secret"
// BearerScheme used for Authorization header
BearerScheme = "Bearer "
)
// AccountFromContext gets the account from the context, which

2
auth/default.go
View File

@ -42,6 +42,7 @@ func (n *noop) Generate(id string, opts ...GenerateOption) (*Account, error) {
Roles: options.Roles,
Secret: options.Secret,
Metadata: options.Metadata,
Namespace: DefaultNamespace,
}, nil
}
@ -64,6 +65,7 @@ func (n *noop) Verify(acc *Account, res *Resource) error {
func (n *noop) Inspect(token string) (*Account, error) {
return &Account{
ID: uuid.New().String(),
Namespace: DefaultNamespace,
}, nil
}

97
auth/service/proto/auth.pb.go
View File

@ -272,6 +272,7 @@ type Resource struct {
Name string `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
Type string `protobuf:"bytes,2,opt,name=type,proto3" json:"type,omitempty"`
Endpoint string `protobuf:"bytes,3,opt,name=endpoint,proto3" json:"endpoint,omitempty"`
Namespace string `protobuf:"bytes,4,opt,name=namespace,proto3" json:"namespace,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
@ -323,6 +324,13 @@ func (m *Resource) GetEndpoint() string {
return ""
}
func (m *Resource) GetNamespace() string {
if m != nil {
return m.Namespace
}
return ""
}
type GenerateRequest struct {
Id string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
Roles []string `protobuf:"bytes,2,rep,name=roles,proto3" json:"roles,omitempty"`
@ -1123,12 +1131,12 @@ func init() {
}
var fileDescriptor_11312eec02fd5712 = []byte{
// 896 bytes of a gzipped FileDescriptorProto
// 901 bytes of a gzipped FileDescriptorProto
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@ -1139,45 +1147,46 @@ var fileDescriptor_11312eec02fd5712 = []byte{
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0x6e, 0x94, 0x0a, 0x00, 0x00,
}

1
auth/service/proto/auth.proto
View File

@ -46,6 +46,7 @@ message Resource{
string name = 1;
string type = 2;
string endpoint = 3;
string namespace = 4;
}
message GenerateRequest {

44
auth/service/service.go
View File

@ -132,6 +132,7 @@ func (s *svc) Grant(role string, res *auth.Resource) error {
Role: role,
Access: pb.Access_GRANTED,
Resource: &pb.Resource{
Namespace: res.Namespace,
Type: res.Type,
Name: res.Name,
Endpoint: res.Endpoint,
@ -146,6 +147,7 @@ func (s *svc) Revoke(role string, res *auth.Resource) error {
Role: role,
Access: pb.Access_GRANTED,
Resource: &pb.Resource{
Namespace: res.Namespace,
Type: res.Type,
Name: res.Name,
Endpoint: res.Endpoint,
@ -157,10 +159,11 @@ 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 {
queries := [][]string{
{res.Type, res.Name, res.Endpoint}, // check for specific role, e.g. service.foo.ListFoo:admin (role is checked in accessForRule)
{res.Type, res.Name, "*"}, // check for wildcard endpoint, e.g. service.foo*
{res.Type, "*"}, // check for wildcard name, e.g. service.*
{"*"}, // check for wildcard type, e.g. *
{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*
{res.Namespace, res.Type, "*"}, // check for wildcard name, e.g. service.*
{res.Namespace, "*"}, // check for wildcard type, e.g. *
{"*"}, // check for wildcard namespace
}
// endpoint is a url which can have wildcard excludes, e.g.
@ -172,23 +175,29 @@ func (s *svc) Verify(acc *auth.Account, res *auth.Resource) error {
}
}
// set a default account id to log
logID := acc.ID
if len(logID) == 0 {
logID = "[no account]"
}
for _, q := range queries {
for _, rule := range s.listRules(q...) {
switch accessForRule(rule, acc, res) {
case pb.Access_UNKNOWN:
continue // rule did not specify access, check the next rule
case pb.Access_GRANTED:
log.Infof("%v granted access to %v:%v:%v by rule %v", acc.ID, res.Type, res.Name, res.Endpoint, rule.Id)
log.Infof("%v:%v granted access to %v:%v:%v:%v by rule %v", acc.Namespace, logID, res.Namespace, res.Type, res.Name, res.Endpoint, rule.Id)
return nil // rule grants the account access to the resource
case pb.Access_DENIED:
log.Infof("%v denied access to %v:%v:%v by rule %v", acc.ID, res.Type, res.Name, res.Endpoint, rule.Id)
log.Infof("%v:%v denied access to %v:%v:%v:%v by rule %v", acc.Namespace, logID, res.Namespace, res.Type, res.Name, res.Endpoint, rule.Id)
return auth.ErrForbidden // rule denies access to the resource
}
}
}
// no rules were found for the resource, default to denying access
log.Infof("%v denied access to %v:%v:%v by lack of rule (%v rules found)", acc.ID, res.Type, res.Name, res.Endpoint, len(s.rules))
log.Infof("%v:%v denied access to %v:%v:%v:%v by lack of rule (%v rules found for namespace)", acc.Namespace, logID, res.Namespace, res.Type, res.Name, res.Endpoint, len(s.listRules(res.Namespace)))
return auth.ErrForbidden
}
@ -249,19 +258,28 @@ func accessForRule(rule *pb.Rule, acc *auth.Account, res *auth.Resource) pb.Acce
return pb.Access_UNKNOWN
}
// listRules gets all the rules from the store which have an id
// prefix matching the filters
// listRules gets all the rules from the store which match the filters.
// filters are namespace, type, name and then endpoint.
func (s *svc) listRules(filters ...string) []*pb.Rule {
s.Lock()
defer s.Unlock()
prefix := strings.Join(filters, ruleJoinKey)
var rules []*pb.Rule
for _, r := range s.rules {
if strings.HasPrefix(r.Id, prefix) {
rules = append(rules, r)
if len(filters) > 0 && r.Resource.Namespace != filters[0] {
continue
}
if len(filters) > 1 && r.Resource.Type != filters[1] {
continue
}
if len(filters) > 2 && r.Resource.Name != filters[2] {
continue
}
if len(filters) > 3 && r.Resource.Endpoint != filters[3] {
continue
}
rules = append(rules, r)
}
return rules

1
config/cmd/cmd.go
View File

@ -494,6 +494,7 @@ func (c *cmd) Before(ctx *cli.Context) error {
*c.opts.Auth = a()
clientOpts = append(clientOpts, client.Auth(*c.opts.Auth))
serverOpts = append(serverOpts, server.Auth(*c.opts.Auth))
}
// Set the profile

2
server/grpc/options.go
View File

@ -5,6 +5,7 @@ import (
"crypto/tls"
"net"
"github.com/micro/go-micro/v2/auth"
"github.com/micro/go-micro/v2/broker"
"github.com/micro/go-micro/v2/codec"
"github.com/micro/go-micro/v2/registry"
@ -66,6 +67,7 @@ func MaxMsgSize(s int) server.Option {
func newOptions(opt ...server.Option) server.Options {
opts := server.Options{
Auth: auth.DefaultAuth,
Codecs: make(map[string]codec.NewCodec),
Metadata: map[string]string{},
Broker: broker.DefaultBroker,

4
server/options.go
View File

@ -60,6 +60,10 @@ func newOptions(opt ...Option) Options {
o(&opts)
}
if opts.Auth == nil {
opts.Auth = auth.DefaultAuth
}
if opts.Broker == nil {
opts.Broker = broker.DefaultBroker
}

5
service.go
View File

@ -34,8 +34,9 @@ func newService(opts ...Option) Service {
// service name
serviceName := options.Server.Options().Name
// TODO: better accessors
authFn := func() auth.Auth { return service.opts.Auth }
// authFn returns the auth, we pass as a function since auth
// has not yet been set at this point.
authFn := func() auth.Auth { return options.Server.Options().Auth }
// wrap client to inject From-Service header on any calls
options.Client = wrapper.FromService(serviceName, options.Client, authFn)

34
util/wrapper/wrapper.go
View File

@ -9,6 +9,7 @@ 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"
)
@ -165,24 +166,47 @@ func AuthHandler(fn func() auth.Auth) server.HandlerWrapper {
if header, ok := metadata.Get(ctx, "Authorization"); ok {
// Ensure the correct scheme is being used
if !strings.HasPrefix(header, auth.BearerScheme) {
return errors.Unauthorized("go.micro.auth", "invalid authorization header. expected Bearer schema")
return errors.Unauthorized(req.Service(), "invalid authorization header. expected Bearer schema")
}
token = header[len(auth.BearerScheme):]
}
// Get the namespace for the request
namespace, ok := metadata.Get(ctx, auth.NamespaceKey)
if !ok {
logger.Errorf("Missing request namespace")
namespace = auth.DefaultNamespace
}
// Inspect the token and get the account
account, err := a.Inspect(token)
if err != nil {
account = &auth.Account{}
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.Warnf("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")
}
// construct the resource
res := &auth.Resource{
Type: "service",
Name: req.Service(),
Endpoint: req.Endpoint(),
Namespace: namespace,
}
// Verify the caller has access to the resource
err = a.Verify(account, &auth.Resource{Type: "service", Name: req.Service(), Endpoint: req.Endpoint()})
err = a.Verify(account, res)
if err != nil && len(account.ID) > 0 {
return errors.Forbidden("go.micro.auth", "Forbidden call made to %v:%v by %v", req.Service(), req.Endpoint(), account.ID)
return errors.Forbidden(req.Service(), "Forbidden call made to %v:%v by %v", req.Service(), req.Endpoint(), account.ID)
} else if err != nil {
return errors.Unauthorized("go.micro.auth", "Unauthorised call made to %v:%v", req.Service(), req.Endpoint())
return errors.Unauthorized(req.Service(), "Unauthorised call made to %v:%v", req.Service(), req.Endpoint())
}
// There is an account, set it in the context