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73 lines
2.3 KiB
73 lines
2.3 KiB
4 years ago
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/*
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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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"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 `json:"sub"` // Email of the license key requestor
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TeamName string `json:"teamName"` // Subnet team name
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AccountID int64 `json:"accountId"` // Subnet account id
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StorageCapacity int64 `json:"capacity"` // Storage capacity used in TB
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ServiceType string `json:"serviceType"` // Subnet service type
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}
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// Valid checks if customer metadata from the license key is valid.
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func (li *LicenseInfo) Valid() error {
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if li.AccountID <= 0 {
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return errors.New("Invalid accountId in claims")
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}
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return nil
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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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// 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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var licInfo LicenseInfo
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_, err := jwt.ParseWithClaims(license, &licInfo, 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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return licInfo, nil
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}
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