signature 计算方法

params := map[string]string{
        "appkey":     "appkey", // 小程序标识
        "secret_key": "secret_key",  // 小程序私钥
        "swanid":     "swanid",   // 用户swanid
    }
signature := "signature"  // 常量，
// 计算签名
swanid_signature :=generageSignature(params, signature)
func generageSignature(params map[string]string, signature string) string {
    keys := []string{}
    for k := range params {
        keys = append(keys, k)
    }
    sort.Strings(keys)
    material := ""
    for _, k := range keys {
        if k == signature {
            continue
        }
        material += fmt.Sprintf("%s=%v", k, params[k])
    }
    md5Sum := md5.Sum([]byte(material))
    return hex.EncodeToString(md5Sum[:])
}

授权设置