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// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package utils
import (
"bytes"
"crypto"
"crypto/rsa"
"crypto/sha512"
"crypto/x509"
"encoding/base64"
"encoding/pem"
"io"
"os"
"path/filepath"
"strconv"
"strings"
l4g "github.com/alecthomas/log4go"
"github.com/mattermost/platform/model"
)
const (
LICENSE_FILENAME = "active.dat"
)
var IsLicensed bool = false
var License *model.License = &model.License{}
var ClientLicense map[string]string = make(map[string]string)
// test public key
var publicKey []byte = []byte(`-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3/k3Al9q1Xe+xngQ/yGn
0suaJopea3Cpf6NjIHdO8sYTwLlxqt0Mdb+qBR9LbCjZfcNmqc5mZONvsyCEoN/5
VoLdlv1m9ao2BSAWphUxE2CPdUWdLOsDbQWliSc5//UhiYeR+67Xxon0Hg0LKXF6
PumRIWQenRHJWqlUQZ147e7/1v9ySVRZksKpvlmMDzgq+kCH/uyM1uVP3z7YXhlN
K7vSSQYbt4cghvWQxDZFwpLlsChoY+mmzClgq+Yv6FLhj4/lk94twdOZau/AeZFJ
NxpC+5KFhU+xSeeklNqwCgnlOyZ7qSTxmdJHb+60SwuYnnGIYzLJhY4LYDr4J+KR
1wIDAQAB
-----END PUBLIC KEY-----`)
func LoadLicense() {
file, err := os.Open(LicenseLocation())
if err != nil {
l4g.Warn(T("utils.license.load_license.open_find.warn"))
return
}
defer file.Close()
buf := bytes.NewBuffer(nil)
io.Copy(buf, file)
if success, licenseStr := ValidateLicense(buf.Bytes()); 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 LicenseLocation() string {
return filepath.Dir(CfgFileName) + "/" + LICENSE_FILENAME
}
func RemoveLicense() bool {
License = &model.License{}
IsLicensed = false
ClientLicense = getClientLicense(License)
if err := os.Remove(LicenseLocation()); err != nil {
l4g.Error(T("utils.license.remove_license.unable.error"), err.Error())
return false
}
return true
}
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["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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