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103 lines
3.0 KiB
103 lines
3.0 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 cmd
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import (
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"errors"
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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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expiry time.Duration
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}
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const (
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// Default JWT token for web handlers is one day.
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defaultJWTExpiry time.Duration = time.Hour * 24
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// Inter-node JWT token expiry is 100 years.
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defaultInterNodeJWTExpiry time.Duration = time.Hour * 24 * 365 * 100
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)
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// newJWT - returns new JWT object.
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func newJWT(expiry time.Duration, cred credential) (*JWT, error) {
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if !isValidAccessKey(cred.AccessKeyID) {
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return nil, errInvalidAccessKeyLength
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}
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if !isValidSecretKey(cred.SecretAccessKey) {
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return nil, errInvalidSecretKeyLength
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}
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return &JWT{cred, expiry}, nil
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}
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var errInvalidAccessKeyLength = errors.New("Invalid access key, access key should be 5 to 20 characters in length")
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var errInvalidSecretKeyLength = errors.New("Invalid secret key, secret key should be 8 to 40 characters in length")
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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(accessKey) {
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return "", errInvalidAccessKeyLength
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}
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tUTCNow := time.Now().UTC()
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token := jwtgo.NewWithClaims(jwtgo.SigningMethodHS512, jwtgo.MapClaims{
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// Token expires in 10hrs.
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"exp": tUTCNow.Add(jwt.expiry).Unix(),
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"iat": tUTCNow.Unix(),
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"sub": accessKey,
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})
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return token.SignedString([]byte(jwt.SecretAccessKey))
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}
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var errInvalidAccessKeyID = errors.New("The access key ID you provided does not exist in our records")
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var errAuthentication = errors.New("Authentication failed, check your access credentials")
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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(accessKey) {
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return errInvalidAccessKeyLength
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}
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if !isValidSecretKey(secretKey) {
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return errInvalidSecretKeyLength
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}
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if accessKey != jwt.AccessKeyID {
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return errInvalidAccessKeyID
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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 errAuthentication
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}
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// Success.
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return nil
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}
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