Add MD5 Hash string.

utils/md5.go

@@ -0,0 +1,33 @@
+package utils
+
+import (
+    "crypto/md5"
+    "encoding/hex"
+)
+
+func MD5Hash(s string) string {
+    hasher := md5.New()
+    hasher.Write([]byte(s))
+    return hex.EncodeToString(hasher.Sum(nil))
+}
+
+func MD5HashExt(s string, seps ...int) (string, []string) {
+    hasher := md5.New()
+    hasher.Write([]byte(s))
+    ss := []rune(hex.EncodeToString(hasher.Sum(nil)))
+    var ret []string
+    if len(seps) >0 {
+        var pos = 0
+        for _, x := range seps {
+            if (pos+x) > len(ss) {
+                panic("overload length of hex string length")
+            }
+            ret = append(ret, string(ss[pos:pos+x]))
+            pos += x
+        }
+        if pos<(len(ss)) {
+            ret = append(ret, string(ss[pos:]))
+        }
+    }
+    return string(ss), ret
+}