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Copy pathverifier.go
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117 lines (107 loc) · 3.56 KB
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/*
* MinIO Cloud Storage, (C) 2020 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 licverifier implements a simple library to verify MinIO Subnet license keys.
package licverifier
import (
"crypto/ecdsa"
"errors"
"fmt"
"time"
"github.com/dgrijalva/jwt-go"
)
// LicenseVerifier needs an ECDSA public key in PEM format for initialization.
type LicenseVerifier struct {
ecPubKey *ecdsa.PublicKey
}
// LicenseInfo holds customer metadata present in the license key.
type LicenseInfo struct {
Email string // Email of the license key requestor
Organization string // Subnet organization name
AccountID int64 // Subnet account id
StorageCapacity int64 // Storage capacity used in TB
Plan string // Subnet plan
ExpiresAt time.Time // Time of license expiry
}
// license key JSON field names
const (
accountID = "aid"
sub = "sub"
expiresAt = "exp"
organization = "org"
capacity = "cap"
plan = "plan"
)
// NewLicenseVerifier returns an initialized license verifier with the given
// ECDSA public key in PEM format.
func NewLicenseVerifier(pemBytes []byte) (*LicenseVerifier, error) {
pbKey, err := jwt.ParseECPublicKeyFromPEM(pemBytes)
if err != nil {
return nil, fmt.Errorf("Failed to parse public key: %s", err)
}
return &LicenseVerifier{
ecPubKey: pbKey,
}, nil
}
// toLicenseInfo extracts LicenseInfo from claims. It returns an error if any of
// the claim values are invalid.
func toLicenseInfo(claims jwt.MapClaims) (LicenseInfo, error) {
accID, ok := claims[accountID].(float64)
if !ok || ok && accID <= 0 {
return LicenseInfo{}, errors.New("Invalid accountId in claims")
}
email, ok := claims[sub].(string)
if !ok {
return LicenseInfo{}, errors.New("Invalid email in claims")
}
expiryTS, ok := claims[expiresAt].(float64)
if !ok {
return LicenseInfo{}, errors.New("Invalid time of expiry in claims")
}
expiresAt := time.Unix(int64(expiryTS), 0)
orgName, ok := claims[organization].(string)
if !ok {
return LicenseInfo{}, errors.New("Invalid organization in claims")
}
storageCap, ok := claims[capacity].(float64)
if !ok {
return LicenseInfo{}, errors.New("Invalid storage capacity in claims")
}
plan, ok := claims[plan].(string)
if !ok {
return LicenseInfo{}, errors.New("Invalid plan in claims")
}
return LicenseInfo{
Email: email,
Organization: orgName,
AccountID: int64(accID),
StorageCapacity: int64(storageCap),
Plan: plan,
ExpiresAt: expiresAt,
}, nil
}
// Verify verifies the license key and validates the claims present in it.
func (lv *LicenseVerifier) Verify(license string) (LicenseInfo, error) {
token, err := jwt.ParseWithClaims(license, &jwt.MapClaims{}, func(token *jwt.Token) (interface{}, error) {
return lv.ecPubKey, nil
})
if err != nil {
return LicenseInfo{}, fmt.Errorf("Failed to verify license: %s", err)
}
if claims, ok := token.Claims.(*jwt.MapClaims); ok && token.Valid {
return toLicenseInfo(*claims)
}
return LicenseInfo{}, errors.New("Invalid claims found in license")
}