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Namespace requests coming via api & web

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This commit is contained in:
Ben Toogood 2020-04-02 17:01:06 +01:00
parent 0241197c6a
commit 4999f6dfd4
6 changed files with 189 additions and 86 deletions
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76
api/server/auth/auth.go
View File

@ -2,11 +2,15 @@ package auth
import (
"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
@ -14,15 +18,28 @@ func CombinedAuthHandler(h http.Handler) http.Handler {
return authHandler{
handler: h,
auth: auth.DefaultAuth,
resolver: path.NewResolver(),
// namespace:
}
}
type authHandler struct {
handler http.Handler
auth auth.Auth
resolver resolver.Resolver
}
func (h authHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
// Determine the namespace
namespace, err := namespaceFromRequest(req)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
// 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 {
@ -43,23 +60,39 @@ 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)
}
// WIP: Determine the name of the service being requested
// endpoint, err := h.resolver.Resolve(req)
// fmt.Printf("EndpointName: %v\n", endpoint.Name)
// fmt.Printf("EndpointMethod: %v\n", endpoint.Method)
// fmt.Printf("EndpointPath: %v\n", endpoint.Path)
// Perform the verification check to see if the account has access to
// the resource they're requesting
err = h.auth.Verify(acc, &auth.Resource{
Type: "service",
Name: "go.micro.web",
Endpoint: req.URL.Path,
Namespace: namespace,
})
// The account has the necessary permissions to access the
// resource
// The account has the necessary permissions to access the resource
if err == nil {
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
@ -77,3 +110,36 @@ 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) {
// check for an ip address
if net.ParseIP(req.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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}

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 {

45
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 +175,30 @@ 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)))
fmt.Println(s.rules)
return auth.ErrForbidden
}
@ -249,19 +259,28 @@ 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