laforge has submitted this change. ( https://gerrit.osmocom.org/c/pysim/+/21953 
)

Change subject: pySim-read.py: Enable reading of EF.IMPU from ISIM
......................................................................

pySim-read.py: Enable reading of EF.IMPU from ISIM

IMS public user identity (IMPU)
As per TS1.103, this EF contains one or more records, with each record able
to hold a public SIP Identity (SIP URI) of the user. EF.IMPI consist of URI TLV 
data
object values see IETF RFC 3261. The URI shall be encoded to an octet string 
according
to UTF-8 encoding rules as specified in IETF RFC 3629

Reading of EF.IMPU is achieved by first selecting the ISIM application using 
its AID.
This is followed by selecting EF.IMPU with File ID - 6f04 in ADF.ISIM

Change-Id: Icf78a564aeaf4254658d3b018ff57dfc4b987e6f
---
M pySim-read.py
M pySim/cards.py
M pysim-testdata/sysmoISIM-SJA2.ok
3 files changed, 32 insertions(+), 0 deletions(-)

Approvals:
  Jenkins Builder: Verified
  laforge: Looks good to me, approved



diff --git a/pySim-read.py b/pySim-read.py
index a7d9063..4047598 100755
--- a/pySim-read.py
+++ b/pySim-read.py
@@ -326,6 +326,14 @@
                except Exception as e:
                        print("IMS private user identity: Can't read file -- " 
+ str(e))

+               # EF.IMPU - IMS public user identity
+               try:
+                       if card.file_exists(EF_ISIM_ADF_map['IMPU']):
+                               res = card.read_impu()
+                               print("IMS public user identity:\n%s" % 
(len(res) and res or '\tNot available\n',))
+               except Exception as e:
+                       print("IMS public user identity: 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 17b7bce..56597b0 100644
--- a/pySim/cards.py
+++ b/pySim/cards.py
@@ -385,6 +385,20 @@
                else:
                        return (None, sw)

+       def read_impu(self):
+               rec_cnt = self._scc.record_count(EF_ISIM_ADF_map['IMPU'])
+               impu_recs = ""
+               for i in range(0, rec_cnt):
+                       (res, sw) = 
self._scc.read_record(EF_ISIM_ADF_map['IMPU'], i + 1)
+                       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)])
+                               impu_recs += "\t%s\n" % (len(content) and 
content or 'Not available')
+                       else:
+                               impu_recs += "IMS public user identity: Can't 
read, response code = %s\n" % (sw)
+               return impu_recs
+

 class _MagicSimBase(Card):
        """
diff --git a/pysim-testdata/sysmoISIM-SJA2.ok b/pysim-testdata/sysmoISIM-SJA2.ok
index 335c886..26e20b0 100644
--- a/pysim-testdata/sysmoISIM-SJA2.ok
+++ b/pysim-testdata/sysmoISIM-SJA2.ok
@@ -184,6 +184,16 @@

 Home Network Domain Name: Not available
 IMS private user identity: Not available
+IMS public user identity:
+       Not available
+       Not available
+       Not available
+       Not available
+       Not available
+       Not available
+       Not available
+       Not available
+
 ISIM Service Table: 190200
        Service 1 - P-CSCF address
        Service 4 - GBA-based Local Key Establishment Mechanism

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Gerrit-Project: pysim
Gerrit-Branch: master
Gerrit-Change-Id: Icf78a564aeaf4254658d3b018ff57dfc4b987e6f
Gerrit-Change-Number: 21953
Gerrit-PatchSet: 1
Gerrit-Owner: herlesupreeth <[email protected]>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: laforge <[email protected]>
Gerrit-MessageType: merged

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