chore: 并入 iotlcm-upstream-chan 历史到 upstream-chan/（原提交 1e74497）

upstream-chan/internal/logic/upstreamimpl/yunda/sign.go

@@ -0,0 +1,29 @@
+package yunda
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"sort"
+	"strings"
+)
+
+func BuildSign(appKey, appSecret string, params map[string]string) string {
+	values := make(map[string]string, len(params)+2)
+	for key, value := range params {
+		values[key] = value
+	}
+	values["appKey"] = appKey
+	values["appSecret"] = appSecret
+	keys := make([]string, 0, len(values))
+	for key := range values {
+		keys = append(keys, key)
+	}
+	sort.Strings(keys)
+	source := appKey
+	for _, key := range keys {
+		source += key + values[key]
+	}
+	source += appKey
+	sum := md5.Sum([]byte(source))
+	return strings.ToUpper(hex.EncodeToString(sum[:]))
+}