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minio/cmd/jwt.go

169 lines
5.2 KiB

/*
* MinIO Cloud Storage, (C) 2016-2020 MinIO, Inc.
*
* 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 cmd
import (
"errors"
"net/http"
"time"
jwtgo "github.com/dgrijalva/jwt-go"
jwtreq "github.com/dgrijalva/jwt-go/request"
xjwt "github.com/minio/minio/cmd/jwt"
"github.com/minio/minio/cmd/logger"
"github.com/minio/minio/pkg/auth"
)
const (
jwtAlgorithm = "Bearer"
// Default JWT token for web handlers is one day.
defaultJWTExpiry = 24 * time.Hour
// Inter-node JWT token expiry is 15 minutes.
defaultInterNodeJWTExpiry = 15 * time.Minute
// URL JWT token expiry is one minute (might be exposed).
defaultURLJWTExpiry = time.Minute
)
var (
errInvalidAccessKeyID = errors.New("The access key ID you provided does not exist in our records")
errChangeCredNotAllowed = errors.New("Changing access key and secret key not allowed")
errAuthentication = errors.New("Authentication failed, check your access credentials")
errNoAuthToken = errors.New("JWT token missing")
errIncorrectCreds = errors.New("Current access key or secret key is incorrect")
errPresignedNotAllowed = errors.New("Unable to generate shareable URL due to lack of read permissions")
)
func authenticateJWTUsers(accessKey, secretKey string, expiry time.Duration) (string, error) {
passedCredential, err := auth.CreateCredentials(accessKey, secretKey)
if err != nil {
return "", err
}
expiresAt := UTCNow().Add(expiry)
return authenticateJWTUsersWithCredentials(passedCredential, expiresAt)
}
func authenticateJWTUsersWithCredentials(credentials auth.Credentials, expiresAt time.Time) (string, error) {
serverCred := globalActiveCred
if serverCred.AccessKey != credentials.AccessKey {
var ok bool
serverCred, ok = globalIAMSys.GetUser(credentials.AccessKey)
if !ok {
return "", errInvalidAccessKeyID
}
}
if !serverCred.Equal(credentials) {
return "", errAuthentication
}
claims := xjwt.NewMapClaims()
claims.SetExpiry(expiresAt)
claims.SetAccessKey(credentials.AccessKey)
jwt := jwtgo.NewWithClaims(jwtgo.SigningMethodHS512, claims)
return jwt.SignedString([]byte(serverCred.SecretKey))
}
func authenticateNode(accessKey, secretKey, audience string) (string, error) {
claims := xjwt.NewStandardClaims()
claims.SetExpiry(UTCNow().Add(defaultInterNodeJWTExpiry))
claims.SetAccessKey(accessKey)
claims.SetAudience(audience)
jwt := jwtgo.NewWithClaims(jwtgo.SigningMethodHS512, claims)
return jwt.SignedString([]byte(secretKey))
}
func authenticateWeb(accessKey, secretKey string) (string, error) {
return authenticateJWTUsers(accessKey, secretKey, defaultJWTExpiry)
}
func authenticateURL(accessKey, secretKey string) (string, error) {
return authenticateJWTUsers(accessKey, secretKey, defaultURLJWTExpiry)
}
// Callback function used for parsing
func webTokenCallback(claims *xjwt.MapClaims) ([]byte, error) {
if claims.AccessKey == globalActiveCred.AccessKey {
return []byte(globalActiveCred.SecretKey), nil
}
if globalIAMSys == nil {
return nil, errInvalidAccessKeyID
}
ok, err := globalIAMSys.IsTempUser(claims.AccessKey)
if err != nil {
if err == errNoSuchUser {
return nil, errInvalidAccessKeyID
}
return nil, err
}
if ok {
return []byte(globalActiveCred.SecretKey), nil
}
cred, ok := globalIAMSys.GetUser(claims.AccessKey)
if !ok {
return nil, errInvalidAccessKeyID
}
return []byte(cred.SecretKey), nil
}
func isAuthTokenValid(token string) bool {
_, _, err := webTokenAuthenticate(token)
return err == nil
}
func webTokenAuthenticate(token string) (*xjwt.MapClaims, bool, error) {
if token == "" {
return nil, false, errNoAuthToken
}
claims := xjwt.NewMapClaims()
if err := xjwt.ParseWithClaims(token, claims, webTokenCallback); err != nil {
return claims, false, errAuthentication
}
owner := claims.AccessKey == globalActiveCred.AccessKey
return claims, owner, nil
}
// Check if the request is authenticated.
// Returns nil if the request is authenticated. errNoAuthToken if token missing.
// Returns errAuthentication for all other errors.
func webRequestAuthenticate(req *http.Request) (*xjwt.MapClaims, bool, error) {
token, err := jwtreq.AuthorizationHeaderExtractor.ExtractToken(req)
if err != nil {
if err == jwtreq.ErrNoTokenInRequest {
return nil, false, errNoAuthToken
}
return nil, false, err
}
claims := xjwt.NewMapClaims()
if err := xjwt.ParseWithClaims(token, claims, webTokenCallback); err != nil {
return claims, false, errAuthentication
}
owner := claims.AccessKey == globalActiveCred.AccessKey
return claims, owner, nil
}
func newAuthToken(audience string) string {
cred := globalActiveCred
token, err := authenticateNode(cred.AccessKey, cred.SecretKey, audience)
logger.CriticalIf(GlobalContext, err)
return token
}