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/*
* Copyright 2018-2024 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 (
"errors"
"reflect"
"github.com/nats-io/nkeys"
)
const (
ConnectionTypeStandard = "STANDARD"
ConnectionTypeWebsocket = "WEBSOCKET"
ConnectionTypeLeafnode = "LEAFNODE"
ConnectionTypeLeafnodeWS = "LEAFNODE_WS"
ConnectionTypeMqtt = "MQTT"
ConnectionTypeMqttWS = "MQTT_WS"
ConnectionTypeInProcess = "IN_PROCESS"
)
type UserPermissionLimits struct {
Permissions
Limits
BearerToken bool `json:"bearer_token,omitempty"`
ProxyRequired bool `json:"proxy_required,omitempty"`
AllowedConnectionTypes StringList `json:"allowed_connection_types,omitempty"`
}
// User defines the user specific data in a user JWT
type User struct {
UserPermissionLimits
// IssuerAccount stores the public key for the account the issuer represents.
// When set, the claim was issued by a signing key.
IssuerAccount string `json:"issuer_account,omitempty"`
GenericFields
}
// Validate checks the permissions and limits in a User jwt
func (u *User) Validate(vr *ValidationResults) {
u.Permissions.Validate(vr)
u.Limits.Validate(vr)
// When BearerToken is true server will ignore any nonce-signing verification
}
// UserClaims defines a user JWT
type UserClaims struct {
ClaimsData
User `json:"nats,omitempty"`
}
// NewUserClaims creates a user JWT with the specific subject/public key
func NewUserClaims(subject string) *UserClaims {
if subject == "" {
return nil
}
c := &UserClaims{}
c.Subject = subject
c.Limits = Limits{
UserLimits{CIDRList{}, nil, ""},
NatsLimits{NoLimit, NoLimit, NoLimit},
}
return c
}
func (u *UserClaims) SetScoped(t bool) {
if t {
u.UserPermissionLimits = UserPermissionLimits{}
} else {
u.Limits = Limits{
UserLimits{CIDRList{}, nil, ""},
NatsLimits{NoLimit, NoLimit, NoLimit},
}
}
}
func (u *UserClaims) HasEmptyPermissions() bool {
return reflect.DeepEqual(u.UserPermissionLimits, UserPermissionLimits{})
}
// Encode tries to turn the user claims into a JWT string
func (u *UserClaims) Encode(pair nkeys.KeyPair) (string, error) {
return u.EncodeWithSigner(pair, nil)
}
func (u *UserClaims) EncodeWithSigner(pair nkeys.KeyPair, fn SignFn) (string, error) {
if !nkeys.IsValidPublicUserKey(u.Subject) {
return "", errors.New("expected subject to be user public key")
}
u.Type = UserClaim
return u.ClaimsData.encode(pair, u, fn)
}
// DecodeUserClaims tries to parse a user claims from a JWT string
func DecodeUserClaims(token string) (*UserClaims, error) {
claims, err := Decode(token)
if err != nil {
return nil, err
}
ac, ok := claims.(*UserClaims)
if !ok {
return nil, errors.New("not user claim")
}
return ac, nil
}
func (u *UserClaims) ClaimType() ClaimType {
return u.Type
}
// Validate checks the generic and specific parts of the user jwt
func (u *UserClaims) Validate(vr *ValidationResults) {
u.ClaimsData.Validate(vr)
u.User.Validate(vr)
if u.IssuerAccount != "" && !nkeys.IsValidPublicAccountKey(u.IssuerAccount) {
vr.AddError("account_id is not an account public key")
}
}
// ExpectedPrefixes defines the types that can encode a user JWT, account
func (u *UserClaims) ExpectedPrefixes() []nkeys.PrefixByte {
return []nkeys.PrefixByte{nkeys.PrefixByteAccount}
}
// Claims returns the generic data from a user jwt
func (u *UserClaims) Claims() *ClaimsData {
return &u.ClaimsData
}
// Payload returns the user specific data from a user JWT
func (u *UserClaims) Payload() interface{} {
return &u.User
}
func (u *UserClaims) String() string {
return u.ClaimsData.String(u)
}
func (u *UserClaims) updateVersion() {
u.GenericFields.Version = libVersion
}
// IsBearerToken returns true if nonce-signing requirements should be skipped
func (u *UserClaims) IsBearerToken() bool {
return u.BearerToken
}
func (u *UserClaims) GetTags() TagList {
return u.User.Tags
}
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