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// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package utils
import (
"crypto"
"crypto/rsa"
"crypto/sha512"
"crypto/x509"
"encoding/base64"
"encoding/pem"
"strconv"
"strings"
l4g "github.com/alecthomas/log4go"
"github.com/mattermost/platform/model"
)
var IsLicensed bool = false
var License *model.License = &model.License{}
var ClientLicense map[string]string = map[string]string{"IsLicensed": "false"}
var publicKey []byte = []byte(`-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyZmShlU8Z8HdG0IWSZ8r
tSyzyxrXkJjsFUf0Ke7bm/TLtIggRdqOcUF3XEWqQk5RGD5vuq7Rlg1zZqMEBk8N
EZeRhkxyaZW8pLjxwuBUOnXfJew31+gsTNdKZzRjrvPumKr3EtkleuoxNdoatu4E
HrKmR/4Yi71EqAvkhk7ZjQFuF0osSWJMEEGGCSUYQnTEqUzcZSh1BhVpkIkeu8Kk
1wCtptODixvEujgqVe+SrE3UlZjBmPjC/CL+3cYmufpSNgcEJm2mwsdaXp2OPpfn
a0v85XL6i9ote2P+fLZ3wX9EoioHzgdgB7arOxY50QRJO7OyCqpKFKv6lRWTXuSt
hwIDAQAB
-----END PUBLIC KEY-----`)
func LoadLicense(licenseBytes []byte) {
if success, licenseStr := ValidateLicense(licenseBytes); success {
license := model.LicenseFromJson(strings.NewReader(licenseStr))
SetLicense(license)
return
}
l4g.Warn(T("utils.license.load_license.invalid.warn"))
}
func SetLicense(license *model.License) bool {
license.Features.SetDefaults()
if !license.IsExpired() && license.IsStarted() {
License = license
IsLicensed = true
ClientLicense = getClientLicense(license)
return true
}
return false
}
func RemoveLicense() {
License = &model.License{}
IsLicensed = false
ClientLicense = getClientLicense(License)
}
func ValidateLicense(signed []byte) (bool, string) {
decoded := make([]byte, base64.StdEncoding.DecodedLen(len(signed)))
_, err := base64.StdEncoding.Decode(decoded, signed)
if err != nil {
l4g.Error(T("utils.license.validate_license.decode.error"), err.Error())
return false, ""
}
if len(decoded) <= 256 {
l4g.Error(T("utils.license.validate_license.not_long.error"))
return false, ""
}
// remove null terminator
for decoded[len(decoded)-1] == byte(0) {
decoded = decoded[:len(decoded)-1]
}
plaintext := decoded[:len(decoded)-256]
signature := decoded[len(decoded)-256:]
block, _ := pem.Decode(publicKey)
public, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
l4g.Error(T("utils.license.validate_license.signing.error"), err.Error())
return false, ""
}
rsaPublic := public.(*rsa.PublicKey)
h := sha512.New()
h.Write(plaintext)
d := h.Sum(nil)
err = rsa.VerifyPKCS1v15(rsaPublic, crypto.SHA512, d, signature)
if err != nil {
l4g.Error(T("utils.license.validate_license.invalid.error"), err.Error())
return false, ""
}
return true, string(plaintext)
}
func getClientLicense(l *model.License) map[string]string {
props := make(map[string]string)
props["IsLicensed"] = strconv.FormatBool(IsLicensed)
if IsLicensed {
props["Users"] = strconv.Itoa(*l.Features.Users)
props["LDAP"] = strconv.FormatBool(*l.Features.LDAP)
props["GoogleSSO"] = strconv.FormatBool(*l.Features.GoogleSSO)
props["Compliance"] = strconv.FormatBool(*l.Features.Compliance)
props["IssuedAt"] = strconv.FormatInt(l.IssuedAt, 10)
props["StartsAt"] = strconv.FormatInt(l.StartsAt, 10)
props["ExpiresAt"] = strconv.FormatInt(l.ExpiresAt, 10)
props["Name"] = l.Customer.Name
props["Email"] = l.Customer.Email
props["Company"] = l.Customer.Company
props["PhoneNumber"] = l.Customer.PhoneNumber
}
return props
}
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