pySim-trace: pySim.apdu_source.stdin_hex

This introduces an "APDU source" for pySim-trace which enables the
decoding of APDUs that are copy+pasted from elsewhere, for example
APDU logs in text form created by proprietary tools, or to decode
personalization scripts or the like.

Change-Id: I5aacf13b7c27cea9efd42f01dacca61068c3aa33

pySim-trace.py

@@ -23,6 +23,7 @@ from pySim.apdu_source.gsmtap import GsmtapApduSource
 from pySim.apdu_source.pyshark_rspro import PysharkRsproPcap, PysharkRsproLive
 from pySim.apdu_source.pyshark_gsmtap import PysharkGsmtapPcap
 from pySim.apdu_source.tca_loader_log import TcaLoaderLogApduSource
+from pySim.apdu_source.stdin_hex import StdinHexApduSource
 
 from pySim.apdu.ts_102_221 import UiccSelect, UiccStatus
 
@@ -190,6 +191,10 @@ parser_tcaloader_log = subparsers.add_parser('tca-loader-log', help="""
 parser_tcaloader_log.add_argument('-f', '--log-file', required=True,
                                   help='Name of the log file to be read')
 
+parser_stdin_hex = subparsers.add_parser('stdin-hex', help="""
+    Read APDUs as hex-string from stdin.""")
+
+
 if __name__ == '__main__':
 
     opts = option_parser.parse_args()
@@ -205,6 +210,8 @@ if __name__ == '__main__':
         s = PysharkGsmtapPcap(opts.pcap_file)
     elif opts.source == 'tca-loader-log':
         s = TcaLoaderLogApduSource(opts.log_file)
+    elif opts.source == 'stdin-hex':
+        s = StdinHexApduSource()
     else:
         raise ValueError("unsupported source %s", opts.source)
 

pySim/apdu_source/stdin_hex.py

@@ -0,0 +1,39 @@
+# coding=utf-8
+
+# (C) 2024 by Harald Welte <laforge@osmocom.org>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+from pySim.utils import h2b
+
+from pySim.apdu.ts_102_221 import ApduCommands as UiccApduCommands
+from pySim.apdu.ts_102_222 import ApduCommands as UiccAdmApduCommands
+from pySim.apdu.ts_31_102 import ApduCommands as UsimApduCommands
+from pySim.apdu.global_platform import ApduCommands as GpApduCommands
+
+from . import ApduSource, PacketType, CardReset
+
+ApduCommands = UiccApduCommands + UiccAdmApduCommands + UsimApduCommands + GpApduCommands
+
+class StdinHexApduSource(ApduSource):
+    """ApduSource for reading apdu hex-strings from stdin."""
+
+    def read_packet(self) -> PacketType:
+        while True:
+            command = input("C-APDU >")
+            if len(command) == 0:
+                continue
+            response = '9000'
+            return ApduCommands.parse_cmd_bytes(h2b(command) + h2b(response))