封装的方法类

signx/signx.go

@@ -0,0 +1,71 @@
+package signx
+
+import (
+	"crypto/md5"
+	"errors"
+	"fmt"
+	"sort"
+	"strings"
+	"yunink/app/pkg/convx"
+)
+
+// 缺点
+// 1.值必须是字符串，数组/对象这些不允许，或者需要通过一定规则转成字符串
+
+// 签名规则
+// 1.除掉不参与签名的用户参数
+// 1.所有参数的key根据字典排序
+// 2.根据key=val&key2=val2的格式组装字符串
+// 3.后面拼接用户签名key `&key=xxxx`得道新字符串
+// 4.把新字符串用md5加密并转大写的道签名的值
+func GetSign(params map[string]interface{}, key string) (sign string, err error) {
+	delete(params, "platform_key")
+	delete(params, "sign")
+	delete(params, "key")
+
+	// 排序
+	keys := make([]string, len(params))
+	i := 0
+	for k := range params {
+		keys[i] = k
+		i++
+	}
+	sort.Strings(keys)
+	var str string
+	for k, v := range keys {
+		if k > 0 {
+			str = str + "&"
+		}
+		val, err := convx.ToString(params[v])
+		if err != nil {
+			return "", err
+		}
+		str = str + v + "=" + val
+	}
+	str = str + "&key=" + key
+	data := []byte(str)
+	has := md5.Sum(data)
+	md5str1 := fmt.Sprintf("%x", has) // []byte转16进制
+	sign = strings.ToUpper(md5str1)
+	return sign, nil
+}
+
+func VerifySign(params map[string]interface{}, key string) error {
+	sign, ok := params["sign"]
+	if !ok {
+		return errors.New("签名参数不存在")
+	}
+	sitn_str, ok := sign.(string)
+	if !ok {
+		return errors.New("sign必须是字符串")
+	}
+	g_sign, err := GetSign(params, key)
+	if err != nil {
+		return err
+	}
+	if sitn_str != g_sign {
+		return errors.New("验签失败")
+	}
+
+	return nil
+}