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saip-tool: Add 'extract-apps' to dump all applications from eSIM profile

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This new action can be used to dump all java applications as either raw
IJC file or converted to CAP format (the usual format generated by
JavaCard toolchains).

Change-Id: I51cffa5ba3ddbea491341d678ec9249d7cf470a5
This commit is contained in:
Harald Welte
2024-06-10 14:44:28 +02:00
parent 3d70f659f3
commit b6532b56d2
3 changed files with 55 additions and 1 deletions
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23
contrib/saip-tool.py
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@@ -19,11 +19,13 @@ import os
import sys
import argparse
import logging
import zipfile
from pathlib import Path
from typing import List
from pySim.esim.saip import *
from pySim.esim.saip.validation import CheckBasicStructure
from pySim import javacard
from pySim.utils import h2b, b2h, swap_nibbles
from pySim.pprint import HexBytesPrettyPrinter
@@ -56,6 +58,10 @@ parser_rn.add_argument('--naa-type', required=True, choices=NAAs.keys(), help='N
parser_info = subparsers.add_parser('info', help='Display information about the profile')
parser_eapp = subparsers.add_parser('extract-apps', help='Extract applications as loadblock file')
parser_eapp.add_argument('--output-dir', default='.', help='Output directory (where to store files)')
parser_eapp.add_argument('--format', default='cap', choices=['ijc', 'cap'], help='Data format of output files')
def do_split(pes: ProfileElementSequence, opts):
i = 0
for pe in pes.pe_list:
@@ -176,6 +182,21 @@ def do_info(pes: ProfileElementSequence, opts):
print("\tInstance AID: %s" % b2h(inst['instanceAID']))
pass
def do_extract_apps(pes:ProfileElementSequence, opts):
apps = pes.pe_by_type.get('application', [])
for app_pe in apps:
package_aid = b2h(app_pe.decoded['loadBlock']['loadPackageAID'])
fname = os.path.join(opts.output_dir, '%s-%s.%s' % (pes.iccid, package_aid, opts.format))
load_block_obj = app_pe.decoded['loadBlock']['loadBlockObject']
print("Writing Load Package AID: %s to file %s" % (package_aid, fname))
if opts.format == 'ijc':
with open(fname, 'wb') as f:
f.write(load_block_obj)
else:
with io.BytesIO(load_block_obj) as f, zipfile.ZipFile(fname, 'w') as z:
javacard.ijc_to_cap(f, z, package_aid)
if __name__ == '__main__':
opts = parser.parse_args()
@@ -197,3 +218,5 @@ if __name__ == '__main__':
do_remove_naa(pes, opts)
elif opts.command == 'info':
do_info(pes, opts)
elif opts.command == 'extract-apps':
do_extract_apps(pes, opts)