Merge pull request #2544 from ANTodorov/patch-1

fix hf mfu pwdgen for 7 byte uid

CHANGELOG.md

@@ -3,6 +3,7 @@ All notable changes to this project will be documented in this file.
 This project uses the changelog in accordance with [keepchangelog](http://keepachangelog.com/). Please use this to write notable changes, which is not the same as git commit log...
 
 ## [unreleased][unreleased]
+- Fixed `hf mfu pwdgen` for the 7 byte UID (@ANTodorov)
 - Added `hf iclass unhash` command to reverse an iclass diversified key to hash0 pre-images (@antiklesys)
 - Added crypto1 support to `hf 14a raw` (@doegox)
 - Changed `hw version` command to print LUA and Python versions (@jmichelp)

client/src/cmdhfmfu.c

@@ -4392,7 +4392,7 @@ static int CmdHF14AMfUPwdGen(const char *Cmd) {
         if (u_len != 7 && u_len != 4) {
             PrintAndLogEx(WARNING, "Key must be 7 hex bytes");
             return PM3_EINVARG;
-        } else {
+        } else if (u_len == 4) {
             // adapt to 7 bytes :)
             memset(uid + 4, 0x00, 3);
             u_len = 7;