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102 lines
1.7 KiB
102 lines
1.7 KiB
package weixinrpc
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import (
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"crypto/md5"
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"encoding/hex"
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"encoding/json"
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"errors"
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"log"
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"strconv"
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"strings"
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"time"
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"git.tetele.net/tgo/crypter"
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)
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/**
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* 签名
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*/
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func Sign(data string, salt string) string {
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var build strings.Builder
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build.WriteString(data)
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build.WriteString(salt)
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build.WriteString(DES_KEY)
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data_str := build.String()
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h := md5.New()
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h.Write([]byte(data_str)) // 需要加密的字符串
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return hex.EncodeToString(h.Sum(nil)) // 输出加密结果
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}
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/**
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* 验证签名
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*/
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func CheckSign(sign_str, data, salt string) bool {
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sign := Sign(data, salt)
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if strings.Compare(sign_str, sign) > -1 {
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return true
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}
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return false
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}
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/**
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* 解密
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*/
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func GetOrgData(res *Response) (string, error) {
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res_data := res.GetData()
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if res_data == "" {
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return "", errors.New("未收到收据")
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}
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time_int64, err := strconv.ParseInt(res.GetTime(), 10, 64)
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if err != nil {
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return "", err
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}
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now_int64 := time.Now().Unix()
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if now_int64-time_int64 > 10 || time_int64-now_int64 > 10 {
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//时间误差前后10秒，返回
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return "", errors.New("返回时间错误")
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}
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check_sign := CheckSign(res.GetSign(), res_data, res.GetTime())
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if !check_sign {
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return "", errors.New("返回数据签名错误")
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}
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//解密
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res_data_de := crypter.DesDe(res_data, DES_KEY)
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return res_data_de, nil
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}
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/**
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* 处理返回结果
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*/
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func HandleRes(res *Response) (*WxApiRes, error) {
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//解密
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res_data_de, err := GetOrgData(res)
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log.Println("res_data_de", res_data_de)
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if err != nil {
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return nil, err
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}
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var res_arr WxApiRes
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err = json.Unmarshal([]byte(res_data_de), &res_arr)
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if err != nil {
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return nil, err
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}
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return &res_arr, nil
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}
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