Rename encrypt_header to do_encrypt_header. Changed signature. Also

write header.bin since we already received it.

tcllib.py

@@ -188,17 +188,14 @@ class FotaCheck:
         encslaves = [s.text for s in enc_list]
         return fileid, fileurl, slaves, encslaves
 
-    def encrypt_header(self, address, encslave):
+    def do_encrypt_header(self, encslave, address):
         params = self.get_creds()
         params[b"address"] = bytes(address, "utf-8")
         url = "https://" + encslave + "/encrypt_header.php"
         req = self.sess.post(url, data=params, verify=False)
         # Expect "HTTP 206 Partial Content" response
-        if req.status_code == 206:  # partial
-            #return req.content
-            contentlength = int(req.headers["Content-Length"])
-            sentinel = "\nHEADER FOUND" if contentlength == 4194320 else "\nNO HEADER FOUND"
-            return sentinel
+        if req.status_code == 206:
+            return req.content
         else:
             print("ENCRYPT: " + repr(req))
             print(repr(req.headers))