142 lines
3.4 KiB
Go
142 lines
3.4 KiB
Go
/*
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Copyright 2020 The KubeSphere Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package token
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import (
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"fmt"
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"github.com/dgrijalva/jwt-go"
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"k8s.io/apiserver/pkg/authentication/user"
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"k8s.io/klog"
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authoptions "kubesphere.io/kubesphere/pkg/apiserver/authentication/options"
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"kubesphere.io/kubesphere/pkg/server/errors"
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"kubesphere.io/kubesphere/pkg/simple/client/cache"
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"time"
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)
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const DefaultIssuerName = "kubesphere"
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var (
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errInvalidToken = errors.New("invalid token")
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errTokenExpired = errors.New("expired token")
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)
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type Claims struct {
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Username string `json:"username"`
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UID string `json:"uid"`
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// Currently, we are not using any field in jwt.StandardClaims
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jwt.StandardClaims
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}
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type jwtTokenIssuer struct {
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name string
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options *authoptions.AuthenticationOptions
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cache cache.Interface
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keyFunc jwt.Keyfunc
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}
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func (s *jwtTokenIssuer) Verify(tokenString string) (User, error) {
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if len(tokenString) == 0 {
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return nil, errInvalidToken
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}
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clm := &Claims{}
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_, err := jwt.ParseWithClaims(tokenString, clm, s.keyFunc)
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if err != nil {
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return nil, err
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}
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// 0 means no expiration.
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// validate token cache
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if s.options.OAuthOptions.AccessTokenMaxAge > 0 {
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_, err = s.cache.Get(tokenCacheKey(tokenString))
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if err != nil {
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if err == cache.ErrNoSuchKey {
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return nil, errTokenExpired
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}
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return nil, err
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}
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}
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return &user.DefaultInfo{Name: clm.Username, UID: clm.UID}, nil
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}
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func (s *jwtTokenIssuer) IssueTo(user User, expiresIn time.Duration) (string, error) {
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clm := &Claims{
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Username: user.GetName(),
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UID: user.GetUID(),
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StandardClaims: jwt.StandardClaims{
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IssuedAt: time.Now().Unix(),
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Issuer: s.name,
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NotBefore: time.Now().Unix(),
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},
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}
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if expiresIn > 0 {
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clm.ExpiresAt = clm.IssuedAt + int64(expiresIn.Seconds())
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, clm)
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tokenString, err := token.SignedString([]byte(s.options.JwtSecret))
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if err != nil {
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klog.Error(err)
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return "", err
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}
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// 0 means no expiration.
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// validate token cache
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if s.options.OAuthOptions.AccessTokenMaxAge > 0 {
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err = s.cache.Set(tokenCacheKey(tokenString), tokenString, s.options.OAuthOptions.AccessTokenMaxAge)
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if err != nil {
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klog.Error(err)
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return "", err
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}
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}
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return tokenString, nil
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}
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func (s *jwtTokenIssuer) Revoke(token string) error {
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if s.options.OAuthOptions.AccessTokenMaxAge > 0 {
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return s.cache.Del(tokenCacheKey(token))
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}
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return nil
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}
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func NewJwtTokenIssuer(issuerName string, options *authoptions.AuthenticationOptions, cache cache.Interface) Issuer {
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return &jwtTokenIssuer{
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name: issuerName,
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options: options,
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cache: cache,
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keyFunc: func(token *jwt.Token) (i interface{}, err error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); ok {
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return []byte(options.JwtSecret), nil
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} else {
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return nil, fmt.Errorf("expect token signed with HMAC but got %v", token.Header["alg"])
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}
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},
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}
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}
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func tokenCacheKey(token string) string {
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return fmt.Sprintf("kubesphere:tokens:%s", token)
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}
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