feat: add GenSign and VerifySign helper

common/helper.go

@@ -2,6 +2,9 @@ package common
 
 import (
 	"net"
+	"strconv"
+
+	"github.com/fufuok/utils/xhash"
 )
 
 // LookupIPNetsString 从 IP 段集合中查询并返回对应数值
@@ -23,3 +26,38 @@ func LookupIPNets(ip net.IP, ipNets map[*net.IPNet]int64) (int64, bool) {
 	}
 	return 0, false
 }
+
+// GenSign 使用时间戳和密钥生成简单签名字符串
+// 算法: md5(ts+key)
+// 结果: ts+sign
+func GenSign(ts int64, key string) string {
+	tss := strconv.FormatInt(ts, 10)
+	return GenSignString(tss, key)
+}
+
+// GenSignString 字符串类型的时间戳生成签名
+func GenSignString(ts, key string) string {
+	if len(ts) != 10 || key == "" {
+		return ""
+	}
+	sign := xhash.MD5Hex(ts + key)
+	return ts + sign
+}
+
+// VerifySign 校验签名
+func VerifySign(key, sign string) bool {
+	if key == "" || len(sign) != 42 {
+		return false
+	}
+	return sign == GenSignString(sign[:10], key)
+}
+
+// VerifySignTTL 校验签名及签名有效期(当前时间 **秒 范围内有效)
+func VerifySignTTL(key, sign string, second int64) bool {
+	if ok := VerifySign(key, sign); !ok {
+		return false
+	}
+	ts, _ := strconv.ParseInt(sign[:10], 10, 64)
+	now := GTimestamp()
+	return ts >= now-second && ts <= now+second
+}

common/helper_test.go

@@ -0,0 +1,17 @@
+package common
+
+import (
+	"testing"
+	"time"
+
+	"github.com/fufuok/utils"
+	"github.com/fufuok/utils/assert"
+)
+
+func TestGenSign(t *testing.T) {
+	key := utils.RandString(18)
+	ts := time.Now().Unix()
+	sign := GenSign(ts, key)
+	t.Log("sign:", sign)
+	assert.True(t, VerifySignTTL(key, sign, 1))
+}