mirror of
https://github.com/minio/minio.git
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118 lines
3.6 KiB
Go
118 lines
3.6 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2020 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 licverifier implements a simple library to verify MinIO Subnet license keys.
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package licverifier
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import (
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"crypto/ecdsa"
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"errors"
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"fmt"
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"time"
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"github.com/dgrijalva/jwt-go"
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)
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// LicenseVerifier needs an ECDSA public key in PEM format for initialization.
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type LicenseVerifier struct {
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ecPubKey *ecdsa.PublicKey
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}
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// LicenseInfo holds customer metadata present in the license key.
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type LicenseInfo struct {
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Email string // Email of the license key requestor
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TeamName string // Subnet team name
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AccountID int64 // Subnet account id
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StorageCapacity int64 // Storage capacity used in TB
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ServiceType string // Subnet service type
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ExpiresAt time.Time // Time of license expiry
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}
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// license key JSON field names
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const (
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accountID = "accountId"
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sub = "sub"
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expiresAt = "exp"
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teamName = "teamName"
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capacity = "capacity"
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serviceType = "serviceType"
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)
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// NewLicenseVerifier returns an initialized license verifier with the given
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// ECDSA public key in PEM format.
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func NewLicenseVerifier(pemBytes []byte) (*LicenseVerifier, error) {
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pbKey, err := jwt.ParseECPublicKeyFromPEM(pemBytes)
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if err != nil {
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return nil, fmt.Errorf("Failed to parse public key: %s", err)
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}
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return &LicenseVerifier{
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ecPubKey: pbKey,
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}, nil
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}
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// toLicenseInfo extracts LicenseInfo from claims. It returns an error if any of
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// the claim values are invalid.
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func toLicenseInfo(claims jwt.MapClaims) (LicenseInfo, error) {
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accID, ok := claims[accountID].(float64)
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if !ok || ok && accID <= 0 {
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return LicenseInfo{}, errors.New("Invalid accountId in claims")
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}
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email, ok := claims[sub].(string)
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if !ok {
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return LicenseInfo{}, errors.New("Invalid email in claims")
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}
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expiryTS, ok := claims[expiresAt].(float64)
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if !ok {
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return LicenseInfo{}, errors.New("Invalid time of expiry in claims")
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}
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expiresAt := time.Unix(int64(expiryTS), 0)
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tName, ok := claims[teamName].(string)
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if !ok {
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return LicenseInfo{}, errors.New("Invalid team name in claims")
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}
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storageCap, ok := claims[capacity].(float64)
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if !ok {
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return LicenseInfo{}, errors.New("Invalid storage capacity in claims")
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}
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sType, ok := claims[serviceType].(string)
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if !ok {
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return LicenseInfo{}, errors.New("Invalid service type in claims")
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}
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return LicenseInfo{
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Email: email,
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TeamName: tName,
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AccountID: int64(accID),
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StorageCapacity: int64(storageCap),
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ServiceType: sType,
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ExpiresAt: expiresAt,
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}, nil
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}
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// Verify verifies the license key and validates the claims present in it.
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func (lv *LicenseVerifier) Verify(license string) (LicenseInfo, error) {
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token, err := jwt.ParseWithClaims(license, &jwt.MapClaims{}, func(token *jwt.Token) (interface{}, error) {
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return lv.ecPubKey, nil
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})
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if err != nil {
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return LicenseInfo{}, fmt.Errorf("Failed to verify license: %s", err)
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}
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if claims, ok := token.Claims.(*jwt.MapClaims); ok && token.Valid {
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return toLicenseInfo(*claims)
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}
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return LicenseInfo{}, errors.New("Invalid claims found in license")
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}
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