Initial QSfera import

Server/vendor/github.com/nats-io/jwt/v2/decoder_user.go

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2020 The NATS Authors
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package jwt
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type v1User struct {
+	Permissions
+	Limits
+	BearerToken bool `json:"bearer_token,omitempty"`
+	// Limit values deprecated inv v2
+	Max int64 `json:"max,omitempty"`
+}
+
+type v1UserClaimsDataDeletedFields struct {
+	v1ClaimsDataDeletedFields
+	IssuerAccount string `json:"issuer_account,omitempty"`
+}
+
+type v1UserClaims struct {
+	ClaimsData
+	v1UserClaimsDataDeletedFields
+	v1User `json:"nats,omitempty"`
+}
+
+func loadUser(data []byte, version int) (*UserClaims, error) {
+	switch version {
+	case 1:
+		var v1a v1UserClaims
+		v1a.Limits = Limits{NatsLimits: NatsLimits{NoLimit, NoLimit, NoLimit}}
+		v1a.Max = NoLimit
+		if err := json.Unmarshal(data, &v1a); err != nil {
+			return nil, err
+		}
+		return v1a.Migrate()
+	case 2:
+		var v2a UserClaims
+		if err := json.Unmarshal(data, &v2a); err != nil {
+			return nil, err
+		}
+		return &v2a, nil
+	default:
+		return nil, fmt.Errorf("library supports version %d or less - received %d", libVersion, version)
+	}
+}
+
+func (oa v1UserClaims) Migrate() (*UserClaims, error) {
+	return oa.migrateV1()
+}
+
+func (oa v1UserClaims) migrateV1() (*UserClaims, error) {
+	var u UserClaims
+	// copy the base claim
+	u.ClaimsData = oa.ClaimsData
+	// move the moved fields
+	u.User.Type = oa.v1ClaimsDataDeletedFields.Type
+	u.User.Tags = oa.v1ClaimsDataDeletedFields.Tags
+	u.User.IssuerAccount = oa.IssuerAccount
+	// copy the user data
+	u.User.Permissions = oa.v1User.Permissions
+	u.User.Limits = oa.v1User.Limits
+	u.User.BearerToken = oa.v1User.BearerToken
+	u.Version = 1
+	return &u, nil
+}