From 36573e5596679f79d58574e2e8b571bae49231dc Mon Sep 17 00:00:00 2001
From: Vadim Yanitskiy <vyanitskiy@sysmocom.de>
Date: Sun, 15 Mar 2026 15:57:12 +0700
Subject: [PATCH] global_platform: refactor gen_install_parameters()

Change-Id: I8756fb38016cdf0527fe2e21edb44381d1dc557f
---
 pySim/global_platform/install_param.py | 28 +++++++++++++-------------
 tests/unittests/test_globalplatform.py |  2 +-
 2 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/pySim/global_platform/install_param.py b/pySim/global_platform/install_param.py
index 89e6c7f0..fc96792c 100644
--- a/pySim/global_platform/install_param.py
+++ b/pySim/global_platform/install_param.py
@@ -17,6 +17,8 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
+from typing import Optional
+
 from osmocom.construct import *
 from osmocom.utils import *
 from osmocom.tlv import *
@@ -46,7 +48,9 @@ class InstallParams(TLV_IE_Collection, nested=[AppSpecificParams, SystemSpecific
     # GPD_SPE_013, table 11-49
     pass
 
-def gen_install_parameters(non_volatile_memory_quota:int, volatile_memory_quota:int, stk_parameter:str):
+def gen_install_parameters(non_volatile_memory_quota: Optional[int] = None,
+                           volatile_memory_quota: Optional[int] = None,
+                           stk_parameter: Optional[str] = None):
 
     # GPD_SPE_013, table 11-49
 
@@ -54,19 +58,15 @@ def gen_install_parameters(non_volatile_memory_quota:int, volatile_memory_quota:
     install_params = InstallParams()
     install_params_dict = [{'app_specific_params': None}]
 
-    #Conditional
-    if non_volatile_memory_quota and volatile_memory_quota and stk_parameter:
-        system_specific_params = []
-        #Optional
-        if non_volatile_memory_quota:
-            system_specific_params += [{'non_volatile_memory_quota': non_volatile_memory_quota}]
-        #Optional
-        if volatile_memory_quota:
-            system_specific_params += [{'volatile_memory_quota': volatile_memory_quota}]
-        #Optional
-        if stk_parameter:
-            system_specific_params += [{'stk_parameter': stk_parameter}]
-        install_params_dict += [{'system_specific_params': system_specific_params}]
+    system_specific_params = []
+    if non_volatile_memory_quota is not None:
+        system_specific_params.append({'non_volatile_memory_quota': non_volatile_memory_quota})
+    if volatile_memory_quota is not None:
+        system_specific_params.append({'volatile_memory_quota': volatile_memory_quota})
+    if stk_parameter is not None:
+        system_specific_params.append({'stk_parameter': stk_parameter})
+    if system_specific_params:
+        install_params_dict.append({'system_specific_params': system_specific_params})
 
     install_params.from_dict(install_params_dict)
     return b2h(install_params.to_bytes())
diff --git a/tests/unittests/test_globalplatform.py b/tests/unittests/test_globalplatform.py
index 069886cf..8698470d 100644
--- a/tests/unittests/test_globalplatform.py
+++ b/tests/unittests/test_globalplatform.py
@@ -295,7 +295,7 @@ class Install_param_Test(unittest.TestCase):
         load_parameters = gen_install_parameters(256, 256, '010001001505000000000000000000000000')
         self.assertEqual(load_parameters, 'c900ef1cc8020100c7020100ca12010001001505000000000000000000000000')
 
-        load_parameters = gen_install_parameters(None, None, '')
+        load_parameters = gen_install_parameters()
         self.assertEqual(load_parameters, 'c900')
 
 if __name__ == "__main__":