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minio/jwt.go

102 lines
2.8 KiB

/*
* Minio Cloud Storage, (C) 2016 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 main
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"io/ioutil"
"time"
jwtgo "github.com/dgrijalva/jwt-go"
"github.com/minio/minio-xl/pkg/probe"
"golang.org/x/crypto/bcrypt"
)
// JWT - jwt auth backend
type JWT struct {
// Public value.
PublicKey *rsa.PublicKey
// private values.
privateKey *rsa.PrivateKey
accessKeyID string
secretAccessKey string
}
const (
jwtExpirationDelta = 10
)
// InitJWT - initialize.
func InitJWT() *JWT {
jwt := &JWT{
privateKey: getPrivateKey(),
}
// Validate if public key is of algorithm *rsa.PublicKey.
var ok bool
jwt.PublicKey, ok = jwt.privateKey.Public().(*rsa.PublicKey)
if !ok {
fatalIf(probe.NewError(errors.New("")), "Unsupported type of public key algorithm found.", nil)
}
// Load credentials configuration.
config, err := loadConfigV2()
fatalIf(err.Trace("JWT"), "Unable to load configuration file.", nil)
// Save access, secret keys.
jwt.accessKeyID = config.Credentials.AccessKeyID
jwt.secretAccessKey = config.Credentials.SecretAccessKey
return jwt
}
// GenerateToken - generates a new Json Web Token based on the incoming user id.
func (b *JWT) GenerateToken(userName string) (string, error) {
token := jwtgo.New(jwtgo.SigningMethodRS512)
// Token expires in 10hrs.
token.Claims["exp"] = time.Now().Add(time.Hour * time.Duration(jwtExpirationDelta)).Unix()
token.Claims["iat"] = time.Now().Unix()
token.Claims["sub"] = userName
tokenString, err := token.SignedString(b.privateKey)
if err != nil {
return "", err
}
return tokenString, nil
}
// Authenticate - authenticates the username and password.
func (b *JWT) Authenticate(username, password string) bool {
hashedPassword, _ := bcrypt.GenerateFromPassword([]byte(b.secretAccessKey), 10)
if username == b.accessKeyID {
return bcrypt.CompareHashAndPassword(hashedPassword, []byte(password)) == nil
}
return false
}
// getPrivateKey - get the generated private key.
func getPrivateKey() *rsa.PrivateKey {
pemBytes, err := ioutil.ReadFile(mustGetPrivateKeyPath())
if err != nil {
panic(err)
}
data, _ := pem.Decode([]byte(pemBytes))
privateKeyImported, err := x509.ParsePKCS1PrivateKey(data.Bytes)
if err != nil {
panic(err)
}
return privateKeyImported
}