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99 lines
2.6 KiB
99 lines
2.6 KiB
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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 main
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import (
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"fmt"
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"strings"
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"time"
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jwtgo "github.com/dgrijalva/jwt-go"
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"golang.org/x/crypto/bcrypt"
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)
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const jwtAlgorithm = "Bearer"
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// JWT - jwt auth backend
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type JWT struct {
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credential
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}
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// Default - each token expires in 10hrs.
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const (
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tokenExpires time.Duration = 10
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)
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// newJWT - returns new JWT object.
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func newJWT() (*JWT, error) {
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if serverConfig == nil {
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return nil, fmt.Errorf("server not initialzed")
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}
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// Save access, secret keys.
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cred := serverConfig.GetCredential()
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if !isValidAccessKey.MatchString(cred.AccessKeyID) {
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return nil, fmt.Errorf("Invalid access key")
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}
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if !isValidSecretKey.MatchString(cred.SecretAccessKey) {
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return nil, fmt.Errorf("Invalid secret key")
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}
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return &JWT{cred}, nil
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}
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// GenerateToken - generates a new Json Web Token based on the incoming access key.
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func (jwt *JWT) GenerateToken(accessKey string) (string, error) {
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// Trim spaces.
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accessKey = strings.TrimSpace(accessKey)
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if !isValidAccessKey.MatchString(accessKey) {
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return "", fmt.Errorf("Invalid access key")
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}
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token := jwtgo.New(jwtgo.SigningMethodHS512)
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// Token expires in 10hrs.
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token.Claims["exp"] = time.Now().Add(time.Hour * tokenExpires).Unix()
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token.Claims["iat"] = time.Now().Unix()
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token.Claims["sub"] = accessKey
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return token.SignedString([]byte(jwt.SecretAccessKey))
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}
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// Authenticate - authenticates incoming access key and secret key.
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func (jwt *JWT) Authenticate(accessKey, secretKey string) error {
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// Trim spaces.
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accessKey = strings.TrimSpace(accessKey)
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if !isValidAccessKey.MatchString(accessKey) {
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return fmt.Errorf("Invalid access key")
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}
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if !isValidSecretKey.MatchString(secretKey) {
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return fmt.Errorf("Invalid secret key")
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}
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if accessKey != jwt.AccessKeyID {
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return fmt.Errorf("Access key does not match")
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}
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hashedSecretKey, _ := bcrypt.GenerateFromPassword([]byte(jwt.SecretAccessKey), bcrypt.DefaultCost)
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if bcrypt.CompareHashAndPassword(hashedSecretKey, []byte(secretKey)) != nil {
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return fmt.Errorf("Authentication failed")
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}
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// Success.
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return nil
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}
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