fix valid signature

lms/djangoapps/verify_student/models.py

@@ -885,8 +885,10 @@ class SoftwareSecurePhotoVerification(PhotoVerification):
             "Content-Type": "application/json",
             "Date": formatdate(timeval=None, localtime=False, usegmt=True)
         }
+
+        body_for_signature = {"EdX-ID": str(self.receipt_id)}
         _message, _sig, authorization = generate_signed_message(
-            "POST", headers, body, access_key, secret_key
+            "POST", headers, body_for_signature, access_key, secret_key
         )
         headers['Authorization'] = authorization
 

lms/djangoapps/verify_student/views.py

@@ -1109,13 +1109,15 @@ def results_callback(request):
 
     headers = {
         "Authorization": request.META.get("HTTP_AUTHORIZATION", ""),
+        "Content-Type": "application/json",
         "Date": request.META.get("HTTP_DATE", "")
     }
 
+    body_for_signature = {"EdX-ID": body_dict.get("EdX-ID")}
     has_valid_signature(
         "POST",
         headers,
-        body_dict,
+        body_for_signature,
         settings.VERIFY_STUDENT["SOFTWARE_SECURE"]["API_ACCESS_KEY"],
         settings.VERIFY_STUDENT["SOFTWARE_SECURE"]["API_SECRET_KEY"]
     )