Fix MD5 comparision (#576)

add encrypt_md5

bypy/cached.py

@@ -297,7 +297,21 @@ def md5(filename, slice = const.OneM):
 			else:
 				break
 
-	return m.hexdigest()
+	return encrypt_md5(m.hexdigest())
+
+@cached
+def encrypt_md5(md5str):
+	if len(md5str)!=32:
+		 return md5str
+	for i in range(0,32):
+		v = int(md5str[i],16)
+		if v<0 or v>16:
+			return md5str
+	md5str = md5str[8:16] + md5str[0:8] + md5str[24:32] + md5str[16:24]
+	encryptstr = ""
+	for  e  in range(0,len(md5str)):
+		encryptstr += hex(int(md5str[e],16) ^ 15 & e)[2:3]
+	return encryptstr[0:9] + chr(ord("g")+int(encryptstr[9],16)) + encryptstr[10:]
 
 # slice md5 for baidu rapidupload
 @cached