mirror of https://github.com/fatedier/frp
104 lines
2.7 KiB
Go
104 lines
2.7 KiB
Go
// 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"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
// 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)
|
|
}
|
|
|
|
func CanonicalAddr(host string, port int) (addr string) {
|
|
if port == 80 || port == 443 {
|
|
addr = host
|
|
} else {
|
|
addr = fmt.Sprintf("%s:%d", host, port)
|
|
}
|
|
return
|
|
}
|
|
|
|
func ParseRangeNumbers(rangeStr string) (numbers []int64, err error) {
|
|
rangeStr = strings.TrimSpace(rangeStr)
|
|
numbers = make([]int64, 0)
|
|
// e.g. 1000-2000,2001,2002,3000-4000
|
|
numRanges := strings.Split(rangeStr, ",")
|
|
for _, numRangeStr := range numRanges {
|
|
// 1000-2000 or 2001
|
|
numArray := strings.Split(numRangeStr, "-")
|
|
// length: only 1 or 2 is correct
|
|
rangeType := len(numArray)
|
|
if rangeType == 1 {
|
|
// single number
|
|
singleNum, errRet := strconv.ParseInt(strings.TrimSpace(numArray[0]), 10, 64)
|
|
if errRet != nil {
|
|
err = fmt.Errorf("range number is invalid, %v", errRet)
|
|
return
|
|
}
|
|
numbers = append(numbers, singleNum)
|
|
} else if rangeType == 2 {
|
|
// range numbers
|
|
min, errRet := strconv.ParseInt(strings.TrimSpace(numArray[0]), 10, 64)
|
|
if errRet != nil {
|
|
err = fmt.Errorf("range number is invalid, %v", errRet)
|
|
return
|
|
}
|
|
max, errRet := strconv.ParseInt(strings.TrimSpace(numArray[1]), 10, 64)
|
|
if errRet != nil {
|
|
err = fmt.Errorf("range number is invalid, %v", errRet)
|
|
return
|
|
}
|
|
if max < min {
|
|
err = fmt.Errorf("range number is invalid")
|
|
return
|
|
}
|
|
for i := min; i <= max; i++ {
|
|
numbers = append(numbers, i)
|
|
}
|
|
} else {
|
|
err = fmt.Errorf("range number is invalid")
|
|
return
|
|
}
|
|
}
|
|
return
|
|
}
|