frp/utils/util/util.go

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2017-03-09 02:03:47 +08:00
// Copyright 2017 fatedier, fatedier@gmail.com
//
// 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 util
import (
"crypto/md5"
"crypto/rand"
"encoding/hex"
"fmt"
)
// RandId return a rand string used in frp.
func RandId() (id string, err error) {
return RandIdWithLen(8)
}
// RandIdWithLen return a rand string with idLen length.
func RandIdWithLen(idLen int) (id string, err error) {
b := make([]byte, idLen)
_, err = rand.Read(b)
if err != nil {
return
}
id = fmt.Sprintf("%x", b)
return
}
func GetAuthKey(token string, timestamp int64) (key string) {
token = token + fmt.Sprintf("%d", timestamp)
md5Ctx := md5.New()
md5Ctx.Write([]byte(token))
data := md5Ctx.Sum(nil)
return hex.EncodeToString(data)
}