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minio/signature-jwt.go

101 lines
2.6 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 (
"fmt"
"strings"
"time"
jwtgo "github.com/dgrijalva/jwt-go"
"golang.org/x/crypto/bcrypt"
)
const jwtAlgorithm = "Bearer"
// JWT - jwt auth backend
type JWT struct {
credential
}
// Default - each token expires in 10hrs.
const (
tokenExpires time.Duration = 10
)
// newJWT - returns new JWT object.
func newJWT() (*JWT, error) {
if serverConfig == nil {
return nil, fmt.Errorf("server not initialzed")
}
// Save access, secret keys.
cred := serverConfig.GetCredential()
if !isValidAccessKey.MatchString(cred.AccessKeyID) {
return nil, fmt.Errorf("Invalid access key")
}
if !isValidSecretKey.MatchString(cred.SecretAccessKey) {
return nil, fmt.Errorf("Invalid secret key")
}
return &JWT{cred}, nil
}
// GenerateToken - generates a new Json Web Token based on the incoming access key.
func (jwt *JWT) GenerateToken(accessKey string) (string, error) {
// Trim spaces.
accessKey = strings.TrimSpace(accessKey)
if !isValidAccessKey.MatchString(accessKey) {
return "", fmt.Errorf("Invalid access key")
}
tUTCNow := time.Now().UTC()
token := jwtgo.NewWithClaims(jwtgo.SigningMethodHS512, jwtgo.MapClaims{
// Token expires in 10hrs.
"exp": tUTCNow.Add(time.Hour * tokenExpires).Unix(),
"iat": tUTCNow.Unix(),
"sub": accessKey,
})
return token.SignedString([]byte(jwt.SecretAccessKey))
}
// Authenticate - authenticates incoming access key and secret key.
func (jwt *JWT) Authenticate(accessKey, secretKey string) error {
// Trim spaces.
accessKey = strings.TrimSpace(accessKey)
if !isValidAccessKey.MatchString(accessKey) {
return fmt.Errorf("Invalid access key")
}
if !isValidSecretKey.MatchString(secretKey) {
return fmt.Errorf("Invalid secret key")
}
if accessKey != jwt.AccessKeyID {
return fmt.Errorf("Access key does not match")
}
hashedSecretKey, _ := bcrypt.GenerateFromPassword([]byte(jwt.SecretAccessKey), bcrypt.DefaultCost)
if bcrypt.CompareHashAndPassword(hashedSecretKey, []byte(secretKey)) != nil {
return fmt.Errorf("Authentication failed")
}
// Success.
return nil
}