From 05b28071680015642275583211a8f47e99b54dfb Mon Sep 17 00:00:00 2001
From: Supreeth Herle <herlesupreeth@gmail.com>
Date: Wed, 25 Mar 2020 10:23:48 +0100
Subject: [PATCH] pySim-read.py: Enable reading of Home Network Domain Name
 from ISIM

As per TS1.103 version 14.2.0, this EF contains the home operator's network domain name.
The Home Network Domain Name, i.e. FQDN shall be encoded to an octet string
according to UTF-8 encoding rules as specified in IETF RFC 3629

Change-Id: Ia3c68c717d105e10d52a8e9d170480da2ad7d65a
---
 pySim-read.py                    | 11 +++++++++++
 pySim/cards.py                   | 10 ++++++++++
 pysim-testdata/sysmoISIM-SJA2.ok |  1 +
 3 files changed, 22 insertions(+)

diff --git a/pySim-read.py b/pySim-read.py
index b6eeab79..f63205a1 100755
--- a/pySim-read.py
+++ b/pySim-read.py
@@ -304,6 +304,17 @@ if __name__ == '__main__':
 		except Exception as e:
 			print("P-CSCF: Can't read file -- " + str(e))
 
+		# EF.DOMAIN - Home Network Domain Name e.g. ims.mncXXX.mccXXX.3gppnetwork.org
+		try:
+			if card.file_exists(EF_ISIM_ADF_map['DOMAIN']):
+				(res, sw) = card.read_domain()
+				if sw == '9000':
+					print("Home Network Domain Name: %s" % (len(res) and res or 'Not available',))
+				else:
+					print("Home Network Domain Name: Can't read, response code = %s" % (sw,))
+		except Exception as e:
+			print("Home Network Domain Name: Can't read file -- " + str(e))
+
 	# Check whether we have th AID of ISIM, if so select it by its AID
 	# EF.IST - File Id in ADF ISIM : 6f07
 	if '9000' == card.select_adf_by_aid(adf="isim"):
diff --git a/pySim/cards.py b/pySim/cards.py
index 0b2d2a6d..277b8317 100644
--- a/pySim/cards.py
+++ b/pySim/cards.py
@@ -336,6 +336,16 @@ class IsimCard(Card):
 		data, sw = self._scc.update_record(EF_ISIM_ADF_map['PCSCF'], 1, rpad(content, rec_size_bytes*2))
 		return sw
 
+	def read_domain(self):
+		(res, sw) = self._scc.read_binary(EF_ISIM_ADF_map['DOMAIN'])
+		if sw == '9000':
+			# Skip the inital tag value ('80') byte and get length of contents
+			length = int(res[2:4], 16)
+			content = h2s(res[4:4+(length*2)])
+			return (content, sw)
+		else:
+			return (None, sw)
+
 
 class _MagicSimBase(Card):
 	"""
diff --git a/pysim-testdata/sysmoISIM-SJA2.ok b/pysim-testdata/sysmoISIM-SJA2.ok
index 03de57f1..4cdd9d5f 100644
--- a/pysim-testdata/sysmoISIM-SJA2.ok
+++ b/pysim-testdata/sysmoISIM-SJA2.ok
@@ -182,6 +182,7 @@ P-CSCF:
 	Not available
 	Not available
 
+Home Network Domain Name: Not available
 ISIM Service Table: 190200
 	Service 1 - P-CSCF address
 	Service 4 - GBA-based Local Key Establishment Mechanism