enable admin to access all buckets

weed/s3api/auth_credentials.go

@@ -132,6 +132,9 @@ func (iam *IdentityAccessManagement) Auth(f http.HandlerFunc, action Action) htt
 		if errCode == s3err.ErrNone {
 			if identity != nil && identity.Name != "" {
 				r.Header.Set(xhttp.AmzIdentityId, identity.Name)
+				if identity.isAdmin() {
+					r.Header.Set(xhttp.AmzIsAdmin, "true")
+				}
 			}
 			f(w, r)
 			return
@@ -190,11 +193,9 @@ func (iam *IdentityAccessManagement) authRequest(r *http.Request, action Action)
 }
 
 func (identity *Identity) canDo(action Action, bucket string) bool {
-	for _, a := range identity.Actions {
-		if a == "Admin" {
+	if identity.isAdmin() {
 		return true
 	}
-	}
 	for _, a := range identity.Actions {
 		if a == action {
 			return true
@@ -211,3 +212,12 @@ func (identity *Identity) canDo(action Action, bucket string) bool {
 	}
 	return false
 }
+
+func (identity *Identity) isAdmin() bool {
+	for _, a := range identity.Actions {
+		if a == "Admin" {
+			return true
+		}
+	}
+	return false
+}

weed/s3api/http/header.go

@@ -32,4 +32,5 @@ const (
 // Non-Standard S3 HTTP request constants
 const (
 	AmzIdentityId = "x-amz-identity-id"
+	AmzIsAdmin = "x-amz-is-admin"  // only set to http request header as a context
 )

weed/s3api/s3api_bucket_handlers.go

@@ -40,11 +40,9 @@ func (s3a *S3ApiServer) ListBucketsHandler(w http.ResponseWriter, r *http.Reques
 	var buckets []*s3.Bucket
 	for _, entry := range entries {
 		if entry.IsDirectory {
-			if id, ok := entry.Extended[xhttp.AmzIdentityId]; ok {
-				if identityId != string(id) {
+			if !s3a.hasAccess(r, entry) {
 				continue
 			}
-			}
 			buckets = append(buckets, &s3.Bucket{
 				Name:         aws.String(entry.Name),
 				CreationDate: aws.Time(time.Unix(entry.Attributes.Crtime, 0).UTC()),
@@ -126,14 +124,10 @@ func (s3a *S3ApiServer) DeleteBucketHandler(w http.ResponseWriter, r *http.Reque
 		return
 	}
 
-	if entry.Extended != nil {
-		if id, ok := entry.Extended[xhttp.AmzIdentityId]; ok {
-			if string(id) != r.Header.Get(xhttp.AmzIdentityId) {
+	if !s3a.hasAccess(r, entry) {
 		writeErrorResponse(w, s3err.ErrAccessDenied, r.URL)
 		return
 	}
-		}
-	}
 
 	err = s3a.WithFilerClient(func(client filer_pb.SeaweedFilerClient) error {
 
@@ -170,14 +164,28 @@ func (s3a *S3ApiServer) HeadBucketHandler(w http.ResponseWriter, r *http.Request
 		return
 	}
 
-	if entry.Extended != nil {
-		if id, ok := entry.Extended[xhttp.AmzIdentityId]; ok {
-			if string(id) != r.Header.Get(xhttp.AmzIdentityId) {
+	if !s3a.hasAccess(r, entry) {
 		writeErrorResponse(w, s3err.ErrAccessDenied, r.URL)
 		return
 	}
+
+	writeSuccessResponseEmpty(w)
+}
+
+func (s3a *S3ApiServer) hasAccess(r *http.Request, entry *filer_pb.Entry) bool {
+	isAdmin := r.Header.Get(xhttp.AmzIsAdmin) != ""
+	if isAdmin {
+		return true
 	}
+	if entry.Extended == nil {
+		return true
 	}
 
-	writeSuccessResponseEmpty(w)
+	identityId := r.Header.Get(xhttp.AmzIdentityId)
+	if id, ok := entry.Extended[xhttp.AmzIdentityId]; ok {
+		if identityId != string(id) {
+			return false
+		}
+	}
+	return true
 }