catarrh
143e1854e2
- Decode ATR (convention, interface bytes, historical, TCK) and PPS (Fi/Di, PCK) - Decode ENVELOPE SMS-PP DOWNLOAD + SEND SHORT MESSAGE TPDU: SCTS, VP, DCS/PID, UDH IEIs, best-effort 8-bit text - Fix Duration data object ([time unit][interval], not a 16-bit int) - List view: command summary instead of raw hex, SW column, raw APDU first line in detail view - Expand FID tables (full pySim USIM/ISIM/SIM set) + context-aware SELECT-path resolution (7FFF = current ADF) - Fix SELECT P1 names (0x09 = path from current DF) - Bump version to 1.3.0
2288 lines
76 KiB
Python
2288 lines
76 KiB
Python
"""APDU/TPDU decoding — CLA, INS, P1/P2, body, and status word.
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Pure Python, no dependencies. Decodes raw TPDU bytes captured by
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the SIMtrace2 sniffer into structured dicts for the PWA to display.
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"""
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# ──────────────────── Status Word names ────────────────────
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SW_NAMES = {
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(0x90, 0x00): 'Normal ending',
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(0x91, 0x00): 'Normal ending, proactive command pending',
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(0x92, 0x00): 'Normal ending after x bytes',
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(0x61, 0x00): 'Response data available',
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(0x62, 0x00): 'Warning — no information',
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(0x62, 0x81): 'Warning — part of data may be corrupted',
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(0x62, 0x82): 'Warning — EOF reached before reading Le bytes',
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(0x62, 0x83): 'Warning — selected file deactivated',
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(0x62, 0x84): 'Warning — FCI not formatted per ISO',
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(0x63, 0x00): 'Warning — no information',
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(0x63, 0xc1): 'Warning — 1 retry remaining',
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(0x63, 0xc2): 'Warning — 2 retries remaining',
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(0x63, 0xc3): 'Warning — 3 retries remaining',
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(0x64, 0x00): 'Execution error — no information',
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(0x65, 0x00): 'Execution error — memory failure',
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(0x65, 0x81): 'Execution error — memory failure',
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(0x66, 0x00): 'Security error — no information',
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(0x66, 0x81): 'Reserved for security-related issues',
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(0x67, 0x00): 'Checking error — wrong length',
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(0x68, 0x00): 'Checking error — no information',
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(0x68, 0x81): 'Logical channel not supported',
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(0x68, 0x82): 'Secure messaging not supported',
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(0x68, 0x83): 'Last command of chain expected',
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(0x68, 0x84): 'Command chaining not supported',
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(0x69, 0x00): 'Checking error — no information',
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(0x69, 0x81): 'Command incompatible with file structure',
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(0x69, 0x82): 'Security status not satisfied',
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(0x69, 0x83): 'Authentication method blocked',
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(0x69, 0x84): 'Referenced data invalidated',
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(0x69, 0x85): 'Conditions of use not satisfied',
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(0x69, 0x86): 'Command not allowed (no current EF)',
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(0x69, 0x87): 'Expected SM data objects missing',
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(0x69, 0x88): 'SM data objects incorrect',
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(0x6a, 0x00): 'Checking error — no information',
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(0x6a, 0x80): 'Incorrect data in command data',
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(0x6a, 0x81): 'Function not supported',
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(0x6a, 0x82): 'File not found',
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(0x6a, 0x83): 'Record not found',
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(0x6a, 0x84): 'Not enough memory space in file',
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(0x6a, 0x85): 'Nc inconsistent with TLV structure',
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(0x6a, 0x86): 'Incorrect P1-P2',
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(0x6a, 0x87): 'Nc inconsistent with P1-P2',
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(0x6a, 0x88): 'Referenced data not found',
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(0x6a, 0x89): 'File already exists',
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(0x6a, 0x8a): 'DF name already exists',
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(0x6b, 0x00): 'Wrong parameters P1-P2',
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(0x6d, 0x00): 'Instruction not supported or invalid',
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(0x6e, 0x00): 'Class not supported',
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(0x6f, 0x00): 'No precise diagnosis',
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}
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def _sw_name(sw1, sw2):
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key = (sw1, sw2)
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return SW_NAMES.get(key)
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# pattern match: 63cx, 62xx, etc.
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_SW_PATTERNS = {
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(0x63,): lambda s1, s2: ('PIN verification failed, %d retries remaining' % (s2 & 0x0f)
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if s2 & 0xc0 == 0xc0 else None),
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(0x62, 0x00): lambda s1, s2: 'Response: %d more bytes available' % s2,
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(0x61,): lambda s1, s2: 'Response: %d bytes available (use GET RESPONSE)' % s2,
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(0x9e,): lambda s1, s2: 'Normal processing, %d bytes of response' % s2,
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(0x9f,): lambda s1, s2: 'Normal processing, %d bytes of response' % s2,
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}
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def decode_sw(raw_sw):
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if len(raw_sw) < 2:
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return None
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sw1, sw2 = raw_sw[-2], raw_sw[-1]
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name = _sw_name(sw1, sw2)
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if name is None:
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for keys, fn in _SW_PATTERNS.items():
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if len(keys) == 1:
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if sw1 == keys[0]:
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name = fn(sw1, sw2)
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if name:
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break
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elif len(keys) == 2:
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if sw1 == keys[0]:
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name = fn(sw1, sw2)
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if name:
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break
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return {
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'sw1': f'{sw1:02x}',
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'sw2': f'{sw2:02x}',
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'name': name,
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}
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# ──────────────────── CLA byte ────────────────────
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def decode_cla(cla):
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chain_bits = (cla >> 4) & 0x03
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chain_names = {0: 'last or only', 1: 'first in chain', 2: 'not last in chain', 3: 'not last'}
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if cla == 0x80:
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interclass = 'ETSI-defined (UICC/USIM)'
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elif cla == 0xa0:
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interclass = 'ETSI-defined (SIM/GSM)'
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elif cla == 0x00:
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interclass = 'inter-industry (ISO 7816-4)'
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else:
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interclass = 'inter-industry' if (cla & 0x80) == 0 else 'proprietary'
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result = {
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'hex': f'{cla:02x}',
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'interclass': interclass,
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'channel': cla & 0x03,
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'secure_messaging': 'none' if (cla & 0x0c) == 0 else 'SM present',
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'chain': chain_names.get(chain_bits, f'unknown ({chain_bits})'),
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}
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return result
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# ──────────────────── Known FIDs ────────────────────
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# Sourced from pySim (TS 102 221 common, TS 51.011 SIM, TS 31.102 USIM,
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# TS 31.103 ISIM). Note: some FIDs are reused across DFs/ADFs; the
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# USIM/ISIM interpretation is preferred here because the '7FFF' (current
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# ADF) SELECT-path resolution is the primary use case.
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KNOWN_FIDS = {
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# Master File and common files (TS 102 221 / TS 51.011)
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'3f00': 'MF',
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'2f00': 'EF_DIR',
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'2f05': 'EF_PL',
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'2f06': 'EF_ARR',
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'2f08': 'EF_UMPC',
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'2fe2': 'EF_ICCID',
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# Dedicated files (MF/ADF level)
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'7f10': 'DF_TELECOM',
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'7f20': 'DF_GSM',
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'5f3b': 'DF_GSM_ACCESS',
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'5f40': 'DF_WLAN',
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'5f50': 'DF_HNB',
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'5f90': 'DF_ProSe',
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'5ff0': 'DF_5G_ProSe',
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'5fc0': 'DF_5GS',
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'5fe0': 'DF_SNPN',
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'5ff1': 'DF_5MBSUECONFIG',
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# SIM (TS 51.011) — DF_TELECOM / DF_GSM
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'6f05': 'EF_LI',
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'6f07': 'EF_IMSI',
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'6f20': 'EF_Kc',
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'6f2c': 'EF_DCK',
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'6f30': 'EF_PLMNsel',
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'6f31': 'EF_HPPLMN',
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'6f32': 'EF_CNL',
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'6f37': 'EF_ACMmax',
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'6f38': 'EF_UST',
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'6f39': 'EF_ACM',
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'6f3a': 'EF_ADN',
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'6f3b': 'EF_FDN',
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'6f3c': 'EF_SMS',
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'6f3d': 'EF_CCP',
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'6f3e': 'EF_GID1',
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'6f3f': 'EF_GID2',
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'6f40': 'EF_MSISDN',
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'6f41': 'EF_PUCT',
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'6f42': 'EF_SMSP',
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'6f43': 'EF_SMSS',
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'6f44': 'EF_LND',
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'6f45': 'EF_CBMI',
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'6f46': 'EF_SPN',
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'6f47': 'EF_SMSR',
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'6f48': 'EF_CBMID',
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'6f49': 'EF_SDN',
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'6f4a': 'EF_EXT1',
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'6f4b': 'EF_EXT2',
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'6f4c': 'EF_EXT3',
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'6f4d': 'EF_BDN',
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'6f4e': 'EF_EXT4',
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'6f4f': 'EF_ECCP',
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'6f50': 'EF_CBMIR',
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'6f51': 'EF_NIA',
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'6f52': 'EF_KcGPRS',
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'6f53': 'EF_LOCI_GPRS',
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'6f58': 'EF_CMI',
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'6f63': 'EF_CPBCCH',
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'6f64': 'EF_InvScan',
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'6f74': 'EF_BCCH',
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'6f78': 'EF_ACC',
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'6f7b': 'EF_FPLMN',
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'6f7e': 'EF_LOCI',
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'6fad': 'EF_AD',
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'6fae': 'EF_Phase',
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'6fb1': 'EF_VGCS',
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'6fb2': 'EF_VGCSS',
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'6fb3': 'EF_VBS',
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'6fb4': 'EF_VBSS',
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'6fb5': 'EF_eMLPP',
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'6fb6': 'EF_AAeM',
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'6fb7': 'EF_ECC',
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'6fc5': 'EF_PNN',
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'6fc6': 'EF_OPL',
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'6fc9': 'EF_MBI',
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'6fca': 'EF_MWIS',
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'6fcb': 'EF_CFIS',
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'6fcd': 'EF_SPDI',
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'6fce': 'EF_MMSN',
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'6fd0': 'EF_MMSICP',
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'6fd1': 'EF_MMSUP',
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'6fd2': 'EF_MMSUCP',
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# USIM (TS 31.102) — ADF_USIM
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'6f01': 'EF_eAKA',
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'6f02': 'EF_IMPI', # ISIM EF_IMPI (USIM reuses 6F02 for EF_OCST)
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'6f06': 'EF_ARR',
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'6f08': 'EF_Keys',
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'6f09': 'EF_KeysPS', # ISIM EF_P-CSCF also reuses 6F09
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'6f55': 'EF_EXT4',
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'6f56': 'EF_EST',
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'6f57': 'EF_ACL',
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'6f5b': 'EF_START-HFN',
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'6f5c': 'EF_THRESHOLD',
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'6f60': 'EF_PLMNwAcT',
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'6f61': 'EF_OPLMNwAcT',
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'6f62': 'EF_HPLMNwAcT',
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'6f65': 'EF_RPLMNAcT',
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'6f73': 'EF_PSLOCI',
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'6f80': 'EF_ICI',
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'6f81': 'EF_OCI',
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'6f82': 'EF_ICT',
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'6f83': 'EF_OCT',
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'6fc4': 'EF_NETPAR',
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'6fc7': 'EF_MBDN',
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'6fc8': 'EF_EXT6',
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'6fcc': 'EF_EXT7',
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'6fcf': 'EF_EXT8',
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'6fd3': 'EF_NIA',
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'6fd4': 'EF_VGCSCA',
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'6fd5': 'EF_VBSCA',
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'6fd6': 'EF_GBABP',
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'6fd7': 'EF_MSK',
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'6fd8': 'EF_MUK',
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'6fd9': 'EF_EHPLMN',
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'6fda': 'EF_GBANL',
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'6fdb': 'EF_EHPLMNPI',
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'6fdd': 'EF_NAFKCA',
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'6fde': 'EF_SPNI',
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'6fdf': 'EF_PNNI',
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'6fe2': 'EF_NCP-IP',
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'6fe3': 'EF_EPSLOCI',
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'6fe4': 'EF_EPSNSC',
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'6fe6': 'EF_UFC',
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'6fe8': 'EF_NASCONFIG',
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'6fec': 'EF_PWS',
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'6fed': 'EF_FDNURI',
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'6fee': 'EF_BDNURI',
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'6fef': 'EF_SDNURI',
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'6ff1': 'EF_IPS',
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'6ff3': 'EF_ePDGId',
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'6ff4': 'EF_ePDGSelection',
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'6ff5': 'EF_ePDGIdEm',
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'6ff6': 'EF_ePDGSelectionEm',
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'6ff7': 'EF_FromPreferred',
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'6ff8': 'EF_IMSConfigData',
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'6ffa': 'EF_WebRTCURI',
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'6ffc': 'EF_XCAPConfigData',
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'6ffd': 'EF_EARFCNList',
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'6ffe': 'EF_MuDMiDConfigData',
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# ISIM (TS 31.103) — ADF_ISIM
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'6f03': 'EF_DOMAIN',
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'6f04': 'EF_IMPU',
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'6f0a': 'EF_GBAUAPI',
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'6f0b': 'EF_IMSDCI',
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'6fe7': 'EF_UICCIARI',
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}
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# DF/ADF children (child FID → name), for context-aware SELECT-path
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# resolution. The '4Fxx' files are only meaningful within their parent
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# DF, and many FIDs collide across DFs (e.g. '4F01' differs between
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# DF_ProSe, DF_5GS, DF_MCS, DF_V2X, DF_SNPN), so they cannot live in the
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# flat KNOWN_FIDS table. Sourced from pySim (TS 31.102 / TS 31.102 telecom).
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DF_CHILDREN = {
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'7f10': { # DF_TELECOM
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'5f3a': 'DF_PHONEBOOK',
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'5f3b': 'DF_MULTIMEDIA',
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'5f3d': 'DF_MCS',
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'5f3e': 'DF_V2X',
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},
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'5f3a': { # DF_PHONEBOOK
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'4f22': 'EF_PSC',
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'4f23': 'EF_CC',
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'4f24': 'EF_PUID',
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'4f30': 'EF_PBR',
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},
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'5f3b': { # DF_GSM_ACCESS (ADF) + DF_MULTIMEDIA (DF_TELECOM) share 5F3B
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'4f20': 'EF_Kc',
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'4f52': 'EF_KcGPRS',
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'4f63': 'EF_CPBCCH',
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'4f64': 'EF_InvScan',
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'4f47': 'EF_MML',
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'4f48': 'EF_MMDF',
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},
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'5f3d': { # DF_MCS
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'4f01': 'EF_MST',
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'4f02': 'EF_MCS_CONFIG',
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},
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'5f3e': { # DF_V2X
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'4f01': 'EF_VST',
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'4f02': 'EF_V2X_CONFIG',
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},
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'5f40': { # DF_WLAN
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'4f41': 'EF_Pseudo',
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'4f42': 'EF_UPLMNWLAN',
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'4f43': 'EF_OPLMNWLAN',
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'4f44': 'EF_UWSIDL',
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'4f45': 'EF_OWSIDL',
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'4f46': 'EF_WRI',
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'4f47': 'EF_HWSIDL',
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'4f48': 'EF_WEHPLMNPI',
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'4f49': 'EF_WHPI',
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'4f4a': 'EF_WLRPLMN',
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'4f4b': 'EF_HPLMNDAI',
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},
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'5f50': { # DF_HNB
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'4f81': 'EF_ACSGL',
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'4f82': 'EF_CSGT',
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'4f83': 'EF_HNBN',
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'4f84': 'EF_OCSGL',
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'4f85': 'EF_OCSGT',
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'4f86': 'EF_OHNBN',
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},
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'5f90': { # DF_ProSe
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'4f01': 'EF_PROSE_MON',
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'4f02': 'EF_PROSE_ANN',
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'4f03': 'EF_PROSEFUNC',
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'4f04': 'EF_PROSE_RADIO_COM',
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'4f05': 'EF_PROSE_RADIO_MON',
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'4f06': 'EF_PROSE_RADIO_ANN',
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'4f07': 'EF_PROSE_POLICY',
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'4f08': 'EF_PROSE_PLMN',
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'4f09': 'EF_PROSE_GC',
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'4f10': 'EF_PST',
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'4f11': 'EF_UIRC',
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'4f12': 'EF_PROSE_GM_DISCOVERY',
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'4f13': 'EF_PROSE_RELAY',
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'4f14': 'EF_PROSE_RELAY_DISCOVERY',
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},
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'5fc0': { # DF_5GS
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'4f01': 'EF_5GS3GPPLOCI',
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'4f02': 'EF_5GSN3GPPLOCI',
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'4f03': 'EF_5GS3GPPNSC',
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'4f04': 'EF_5GSN3GPPNSC',
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'4f05': 'EF_5GAUTHKEYS',
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'4f06': 'EF_UAC_AIC',
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'4f07': 'EF_SUCI_Calc_Info',
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'4f08': 'EF_OPL5G',
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'4f09': 'EF_SUPI_NAI',
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'4f0a': 'EF_Routing_Indicator',
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'4f0b': 'EF_URSP',
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'4f0c': 'EF_TN3GPPSNN',
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'4f0d': 'EF_CAG',
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'4f0e': 'EF_SOR-CMCI',
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'4f0f': 'EF_DRI',
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'4f10': 'EF_5GSEDRX',
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'4f11': 'EF_5GNSWO_CONF',
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'4f15': 'EF_MCHPPLMN',
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'4f16': 'EF_KAUSF_DERIVATION',
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},
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'5fd0': { # DF_SAIP
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'4f01': 'EF_SUCI_Calc_Info',
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},
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'5fe0': { # DF_SNPN
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'4f01': 'EF_PWS_SNPN',
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'4f02': 'EF_NID',
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},
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'5ff0': { # DF_5G_ProSe
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'4f02': 'EF_5G_PROSE_DD',
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'4f03': 'EF_5G_PROSE_DC',
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'4f04': 'EF_5G_PROSE_U2NRU',
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'4f05': 'EF_5G_PROSE_RU',
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'4f06': 'EF_5G_PROSE_UIR',
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'4f07': 'EF_5G_PROSE_U2URU',
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'4f08': 'EF_5G_PROSE_EU',
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},
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'5ff1': { # DF_5MBSUECONFIG
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'4f01': 'EF_5MBSUECONFIG',
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},
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}
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def _decode_select_path(body_hex):
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"""Decode a SELECT path body into a human-readable path.
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|
|
Splits the body into 2-byte FIDs and names each component, tracking
|
|
the parent DF so DF-specific children (e.g. '4Fxx') resolve against
|
|
the correct DF. '7fff' is the implicit FID for the current
|
|
application's ADF, whose children are the flat KNOWN_FIDS files.
|
|
"""
|
|
pairs = [body_hex[i:i + 4] for i in range(0, len(body_hex), 4)]
|
|
parts = []
|
|
parent = None
|
|
for p in pairs:
|
|
if p == '7fff':
|
|
parts.append('current ADF')
|
|
parent = None
|
|
continue
|
|
name = None
|
|
if parent and parent in DF_CHILDREN:
|
|
name = DF_CHILDREN[parent].get(p)
|
|
if name is None:
|
|
name = KNOWN_FIDS.get(p)
|
|
parts.append(name if name else p.upper())
|
|
parent = p if p in DF_CHILDREN else None
|
|
return '/'.join(parts)
|
|
|
|
|
|
# ──────────────────── Per-INS specifications ────────────────────
|
|
|
|
APDU_SPEC = {
|
|
0xA4: {
|
|
'name': 'SELECT',
|
|
'p1': {
|
|
0x00: 'DF/EF/MF by file ID',
|
|
0x01: 'Child DF',
|
|
0x03: 'Parent DF',
|
|
0x04: 'Application DF by name',
|
|
0x08: 'Path from MF',
|
|
0x09: 'Path from current DF',
|
|
},
|
|
'p2': {
|
|
0x00: 'No indication',
|
|
0x04: 'Return FCI template',
|
|
0x08: 'Return FCP template',
|
|
0x0c: 'No data returned',
|
|
},
|
|
'body': {'label': 'FID/AID', 'fids': KNOWN_FIDS},
|
|
},
|
|
0xB0: {
|
|
'name': 'READ BINARY',
|
|
'p1p2': {'fmt': 'uint16be', 'label': 'Offset'},
|
|
'body': None,
|
|
},
|
|
0xB2: {
|
|
'name': 'READ RECORD',
|
|
'p1': {'fmt': 'uint8', 'label': 'Record number'},
|
|
'p2': {
|
|
'label': 'Mode',
|
|
'bits': {
|
|
0x07: 'currently selected EF',
|
|
0x04: 'use record number from P1',
|
|
0x02: 'previous record',
|
|
0x03: 'next record',
|
|
0x05: 'first record',
|
|
0x06: 'last record',
|
|
},
|
|
},
|
|
'body': None,
|
|
},
|
|
0xB1: {
|
|
'name': 'READ RECORD (B1)',
|
|
'p1': {'fmt': 'uint8', 'label': 'Record number'},
|
|
'p2': {
|
|
'label': 'Mode',
|
|
'bits': {
|
|
0x07: 'currently selected EF',
|
|
0x04: 'use record number from P1',
|
|
0x02: 'previous record',
|
|
0x03: 'next record',
|
|
0x05: 'first record',
|
|
0x06: 'last record',
|
|
},
|
|
},
|
|
'body': None,
|
|
},
|
|
0xD6: {
|
|
'name': 'UPDATE BINARY',
|
|
'p1p2': {'fmt': 'uint16be', 'label': 'Offset'},
|
|
'body': {'label': 'Data'},
|
|
},
|
|
0xDC: {
|
|
'name': 'UPDATE RECORD',
|
|
'p1': {'fmt': 'uint8', 'label': 'Record number'},
|
|
'p2': {
|
|
'label': 'Mode',
|
|
'bits': {
|
|
0x07: 'currently selected EF',
|
|
0x04: 'use record number from P1',
|
|
0x02: 'previous record',
|
|
0x03: 'next record',
|
|
0x05: 'first record',
|
|
0x06: 'last record',
|
|
},
|
|
},
|
|
'body': {'label': 'Data'},
|
|
},
|
|
0x20: {
|
|
'name': 'VERIFY PIN',
|
|
'p1': {0x00: 'Verify PIN1', 0x01: 'Verify PIN2', 0x02: 'Verify ADM2',
|
|
0x03: 'Verify ADM3', 0x04: 'Verify ADM4', 0x80: 'Verify PUK',
|
|
0x81: 'Verify ADM5'},
|
|
'p2': {0x00: 'No indication', 0x04: 'Reset PIN'},
|
|
'body': {'label': 'PIN value'},
|
|
},
|
|
0x21: {
|
|
'name': 'VERIFY',
|
|
'body': {'label': 'Data'},
|
|
},
|
|
0x24: {
|
|
'name': 'CHANGE PIN',
|
|
'p1': {0x00: 'Change PIN1', 0x01: 'Change PIN2', 0x02: 'Change ADM2',
|
|
0x03: 'Change ADM3', 0x04: 'Change ADM4', 0x80: 'Change PUK',
|
|
0x81: 'Change ADM5'},
|
|
'body': {'label': 'Old+new PIN'},
|
|
},
|
|
0x26: {
|
|
'name': 'DISABLE PIN',
|
|
'body': {'label': 'PIN value'},
|
|
},
|
|
0x28: {
|
|
'name': 'ENABLE PIN',
|
|
'body': {'label': 'PIN value'},
|
|
},
|
|
0x2C: {
|
|
'name': 'UNBLOCK PIN',
|
|
'p1': {0x00: 'Unblock PIN1', 0x01: 'Unblock PIN2', 0x02: 'Unblock ADM2',
|
|
0x03: 'Unblock ADM3', 0x04: 'Unblock ADM4', 0x80: 'Unblock PUK',
|
|
0x81: 'Unblock ADM5'},
|
|
'body': {'label': 'PUK + new PIN'},
|
|
},
|
|
0x88: {
|
|
'name': 'AUTHENTICATE',
|
|
'p1': {0x00: 'Run GSM algorithm', 0x80: 'Run 3G algo (resynchronisation)'},
|
|
'body': {'label': 'Challenge/session key'},
|
|
},
|
|
0x89: {
|
|
'name': 'AUTHENTICATE',
|
|
'body': {'label': 'Response/resynchronisation data'},
|
|
},
|
|
0x84: {
|
|
'name': 'GET CHALLENGE',
|
|
'body': None,
|
|
},
|
|
0x70: {
|
|
'name': 'MANAGE CHANNEL',
|
|
'p1': {0x00: 'Open channel', 0x80: 'Close channel'},
|
|
'body': None,
|
|
},
|
|
0xC0: {
|
|
'name': 'GET RESPONSE',
|
|
'body': None,
|
|
},
|
|
0xC2: {
|
|
'name': 'ENVELOPE',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0x12: {
|
|
'name': 'FETCH',
|
|
'body': None,
|
|
},
|
|
0x14: {
|
|
'name': 'TERMINAL RESPONSE',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0x32: {
|
|
'name': 'INCREASE',
|
|
'p1p2': {'fmt': 'uint16be', 'label': 'Value'},
|
|
'body': {'label': 'Data'},
|
|
},
|
|
0x04: {
|
|
'name': 'DEACTIVATE FILE',
|
|
'p1p2': {'fmt': 'uint16be', 'label': 'File ID'},
|
|
'body': None,
|
|
},
|
|
0x44: {
|
|
'name': 'ACTIVATE FILE',
|
|
'p1p2': {'fmt': 'uint16be', 'label': 'File ID'},
|
|
'body': None,
|
|
},
|
|
0xF2: {
|
|
'name': 'STATUS',
|
|
'p1': {0x00: 'No indication', 0x01: 'Current DF', 0x02: 'EF under current DF',
|
|
0x04: 'DF name', 0x0d: 'Applet status'},
|
|
'body': None,
|
|
},
|
|
0xE0: {
|
|
'name': 'CREATE FILE',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0xE4: {
|
|
'name': 'DELETE FILE',
|
|
'p1': {0x00: 'Delete EF/DF', 0x0c: 'Delete EF', 0x0d: 'Delete DF'},
|
|
'body': None,
|
|
},
|
|
0xAA: {
|
|
'name': 'TERMINAL CAPABILITY',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0x73: {
|
|
'name': 'MANAGE SECURE CHANNEL',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0x75: {
|
|
'name': 'TRANSACT DATA',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0x78: {
|
|
'name': 'GET IDENTITY',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0xA2: {
|
|
'name': 'SEARCH RECORD',
|
|
'p1': {'fmt': 'uint8', 'label': 'Record number'},
|
|
'p2': {
|
|
'label': 'Mode',
|
|
'bits': {
|
|
0x04: 'Simple search (forward)',
|
|
0x02: 'Backward search',
|
|
0x01: 'Enhanced search',
|
|
},
|
|
},
|
|
'body': {'label': 'Search pattern'},
|
|
},
|
|
0xCB: {
|
|
'name': 'RETRIEVE DATA',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0xDB: {
|
|
'name': 'SET DATA',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0x10: {
|
|
'name': 'TERMINAL PROFILE',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0x76: {
|
|
'name': 'SUSPEND UICC',
|
|
'body': None,
|
|
},
|
|
0xCA: {
|
|
'name': 'GET DATA',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0xDA: {
|
|
'name': 'PUT DATA',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
0xE2: {
|
|
'name': 'STORE DATA',
|
|
'body': {'label': 'TLV data'},
|
|
},
|
|
}
|
|
|
|
|
|
# ──────────────────── CAT (TS 102 223) command types ────────────────────
|
|
|
|
CAT_COMMAND_TYPES = {
|
|
0x01: 'REFRESH',
|
|
0x02: 'MORE TIME',
|
|
0x03: 'POLL INTERVAL',
|
|
0x04: 'POLLING OFF',
|
|
0x05: 'SET UP EVENT LIST',
|
|
0x10: 'SET UP CALL',
|
|
0x11: 'SEND SS',
|
|
0x12: 'SEND USSD',
|
|
0x13: 'SEND SHORT MESSAGE',
|
|
0x14: 'SEND DTMF',
|
|
0x15: 'LAUNCH BROWSER',
|
|
0x16: 'GEOGRAPHICAL LOCATION REQUEST',
|
|
0x20: 'PLAY TONE',
|
|
0x21: 'DISPLAY TEXT',
|
|
0x22: 'GET INKEY',
|
|
0x23: 'GET INPUT',
|
|
0x24: 'SELECT ITEM',
|
|
0x25: 'SET UP MENU',
|
|
0x26: 'PROVIDE LOCAL INFORMATION',
|
|
0x27: 'TIMER MANAGEMENT',
|
|
0x28: 'SET UP IDLE MODE TEXT',
|
|
0x30: 'PERFORM CARD APDU',
|
|
0x31: 'POWER ON CARD',
|
|
0x32: 'POWER OFF CARD',
|
|
0x33: 'GET READER STATUS',
|
|
0x34: 'RUN AT COMMAND',
|
|
0x35: 'LANGUAGE NOTIFICATION',
|
|
0x40: 'OPEN CHANNEL',
|
|
0x41: 'CLOSE CHANNEL',
|
|
0x42: 'RECEIVE DATA',
|
|
0x43: 'SEND DATA',
|
|
0x44: 'GET CHANNEL STATUS',
|
|
0x45: 'SERVICE SEARCH',
|
|
0x46: 'GET SERVICE INFORMATION',
|
|
0x47: 'DECLARE SERVICE',
|
|
0x50: 'SET FRAMES',
|
|
0x51: 'GET FRAMES STATUS',
|
|
0x60: 'RETRIEVE MULTIMEDIA MESSAGE',
|
|
0x61: 'SUBMIT MULTIMEDIA MESSAGE',
|
|
0x62: 'DISPLAY MULTIMEDIA MESSAGE',
|
|
0x70: 'ACTIVATE',
|
|
0x71: 'CONTACTLESS STATE CHANGED',
|
|
0x72: 'COMMAND CONTAINER',
|
|
0x73: 'ENCAPSULATED SESSION CONTROL',
|
|
0x81: 'END OF PROACTIVE SESSION',
|
|
}
|
|
|
|
ENVELOPE_TYPES = {
|
|
0xD1: 'SMS-PP DOWNLOAD',
|
|
0xD2: 'CELL BROADCAST DOWNLOAD',
|
|
0xD3: 'MENU SELECTION',
|
|
0xD4: 'CALL CONTROL',
|
|
0xD5: 'MO SHORT MESSAGE CONTROL',
|
|
0xD6: 'EVENT DOWNLOAD',
|
|
0xD7: 'TIMER EXPIRATION',
|
|
}
|
|
|
|
|
|
def parse_tlv(data):
|
|
"""Parse a BER-TLV structure into a list of (tag, length, value) tuples.
|
|
|
|
Handles single-byte tags and both short-form (< 128) and long-form
|
|
BER-TLV lengths (0x81 NN, 0x82 NN NN). Indefinite lengths (0x80)
|
|
and truncated data cause parsing to stop at that point.
|
|
"""
|
|
tlvs = []
|
|
i = 0
|
|
n = len(data)
|
|
while i < n:
|
|
if i + 2 > n:
|
|
break
|
|
tag = data[i]
|
|
i += 1
|
|
length = data[i]
|
|
i += 1
|
|
if length & 0x80:
|
|
num_len = length & 0x7F
|
|
if num_len == 0: # indefinite length — not supported
|
|
break
|
|
if i + num_len > n:
|
|
break
|
|
length = int.from_bytes(data[i:i + num_len], 'big')
|
|
i += num_len
|
|
if i + length > n:
|
|
break
|
|
value = data[i:i + length]
|
|
i += length
|
|
tlvs.append((tag, length, value))
|
|
return tlvs
|
|
|
|
|
|
# TS 102 223 — PROVIDE LOCAL INFORMATION command qualifier values
|
|
PLI_QUALIFIERS = {
|
|
0x00: 'Location Info (MCC, MNC, LAC/TAC, Cell ID)',
|
|
0x01: 'IMEI',
|
|
0x02: 'Network Measurement results',
|
|
0x03: 'Date, time and time zone',
|
|
0x04: 'Language setting',
|
|
0x05: 'Timing Advance',
|
|
0x06: 'Access Technology (single)',
|
|
0x08: 'IMEISV',
|
|
0x09: 'Search Mode',
|
|
0x0A: 'Battery charge state',
|
|
0x0C: 'Current WSID',
|
|
0x0D: 'Broadcast Network info',
|
|
0x0E: 'Multiple Access Technologies',
|
|
0x0F: 'Location Info (multi-RAT)',
|
|
0x10: 'NMR (multi-RAT)',
|
|
0x11: 'CSG ID list + HNB name',
|
|
0x12: 'H(e)NB IP address',
|
|
0x13: 'H(e)NB surrounding macrocells',
|
|
0x14: 'Current WLAN identifier',
|
|
0x15: 'Slices information',
|
|
0x16: 'CAG information list',
|
|
0x17: 'Rejected slices information',
|
|
}
|
|
|
|
|
|
def _command_details_name(value):
|
|
"""Decode a Command Details TLV value (number, type, qualifier).
|
|
|
|
Returns the command type name, with the PLI qualifier description
|
|
appended for PROVIDE LOCAL INFORMATION (type 0x26).
|
|
"""
|
|
if len(value) < 2:
|
|
return None
|
|
name = CAT_COMMAND_TYPES.get(value[1])
|
|
if not name:
|
|
return None
|
|
if value[1] == 0x26 and len(value) >= 3: # PROVIDE LOCAL INFORMATION
|
|
q = PLI_QUALIFIERS.get(value[2])
|
|
if q:
|
|
name = f'{name} — {q}'
|
|
return name
|
|
|
|
|
|
def decode_cat(ins, body):
|
|
"""Decode a CAT (TS 102 223) payload, returning the command/event name.
|
|
|
|
For FETCH (0x12) the body is a proactive UICC command (D0 TLV) whose
|
|
Command Details (tag 81) second byte is the Type of Command.
|
|
For ENVELOPE (0xC2) the first TLV tag is the envelope type.
|
|
Returns a string name or None.
|
|
"""
|
|
if not body:
|
|
return None
|
|
if ins == 0x12: # FETCH → proactive command
|
|
for tag, _length, value in parse_tlv(body):
|
|
if tag != 0xD0:
|
|
continue
|
|
for t2, _l2, v2 in parse_tlv(value):
|
|
if t2 == 0x81:
|
|
return _command_details_name(v2)
|
|
elif ins == 0xC2: # ENVELOPE → envelope type
|
|
return ENVELOPE_TYPES.get(body[0])
|
|
return None
|
|
|
|
|
|
def decode_tr_command(body):
|
|
"""Extract the proactive command type echoed in a TERMINAL RESPONSE body.
|
|
|
|
Returns the CAT command name (context the TR is responding to), or None.
|
|
"""
|
|
if not body:
|
|
return None
|
|
for tag, _length, value in parse_tlv(body):
|
|
if tag == 0x81:
|
|
return _command_details_name(value)
|
|
return None
|
|
|
|
|
|
# ──────────────────── Response decoders ────────────────────
|
|
|
|
# TS 102 223 Result (TERMINAL RESPONSE) — general result codes
|
|
TR_RESULTS = {
|
|
0x00: 'Command performed successfully',
|
|
0x01: 'Command performed with partial comprehension',
|
|
0x02: 'Command performed, with missing information',
|
|
0x03: 'REFRESH performed with additional EFs read',
|
|
0x04: 'Command performed successfully, but requested icon could not be displayed',
|
|
0x05: 'Command performed, but modified by call control by NAA',
|
|
0x06: 'Command performed successfully, limited service',
|
|
0x07: 'Command performed with modification',
|
|
0x08: 'REFRESH performed but indicated NAA was not active',
|
|
0x09: 'Command performed successfully, tone not played',
|
|
0x0A: 'Proactive UICC session terminated by the user',
|
|
0x0B: 'Backward move in the proactive UICC session requested by the user',
|
|
0x0C: 'No response from user',
|
|
0x0D: 'Help information required by the user',
|
|
0x0E: 'USSD/SS transaction terminated by the user',
|
|
0x10: 'Terminal currently unable to process command (screen busy)',
|
|
0x11: 'Terminal currently unable to process command (busy on call)',
|
|
0x12: 'Terminal currently unable to process command (USSD/SS ongoing)',
|
|
0x13: 'Terminal currently unable to process command (no service)',
|
|
0x14: 'Terminal currently unable to process command (access control class bar)',
|
|
0x15: 'Terminal currently unable to process command (radio resource unavailable)',
|
|
0x20: 'Network currently unable to process command',
|
|
0x30: 'Beyond terminal capability',
|
|
0x31: 'Command type not understood by terminal',
|
|
0x32: 'Command data not understood by terminal',
|
|
0x33: 'Command number not known by terminal',
|
|
0x34: 'SS Return Error',
|
|
0x35: 'SMS RP-ERROR',
|
|
0x36: 'Error, required values are missing',
|
|
0x37: 'USSD Return Error',
|
|
0x38: 'MultipleCard commands error',
|
|
0x39: 'Interaction with CC by NAA, wrong procedure',
|
|
0x3C: 'Access Technology unable to process command',
|
|
0x3D: 'Frames error',
|
|
0x3E: 'MMS Error',
|
|
}
|
|
|
|
|
|
def _swap_nibbles(h):
|
|
"""Swap the nibbles of each hex byte in a hex string."""
|
|
return ''.join(b[1] + b[0] for b in (h[i:i + 2] for i in range(0, len(h), 2)))
|
|
|
|
|
|
def _decode_plmn(b):
|
|
"""Decode a 3-byte PLMN (TS 24.008) into {'mcc', 'mnc'}."""
|
|
if len(b) < 3:
|
|
return None
|
|
h = b.hex()
|
|
mcc = (h[1] + h[0] + h[3]).upper().strip('F') or '0'
|
|
mnc = (h[5] + h[4] + h[2]).upper().strip('F') or '0'
|
|
return {'mcc': mcc, 'mnc': mnc}
|
|
|
|
|
|
def _decode_imei(val):
|
|
"""Decode an 8-byte BCD IMEI (TS 24.008 Mobile Identity) into a string."""
|
|
swapped = _swap_nibbles(val.hex())
|
|
if not swapped:
|
|
return None
|
|
# First nibble is the odd/even indicator (0x8|…) with digit 1 following;
|
|
# drop it and any trailing 'F' padding.
|
|
digits = swapped[1:].rstrip('fF')
|
|
return digits or None
|
|
|
|
|
|
# TS 102 223 §6.8.7 Local information — COMPREHENSION-TLV tags (base form)
|
|
PLI_LOCATION_INFO = 0x13
|
|
PLI_IMEI = 0x14
|
|
PLI_NMR = 0x16
|
|
PLI_DATETIME = 0x26
|
|
PLI_LANGUAGE = 0x2D
|
|
PLI_ACCESS_TECH = 0x3F
|
|
PLI_TIMING_ADVANCE = 0x46
|
|
PLI_BATTERY = 0x63
|
|
PLI_SEARCH_MODE = 0x65
|
|
|
|
_ACCESS_TECH_NAMES = {
|
|
0x00: 'GSM', 0x01: 'ANSI-136 (TIA/EIA-553)', 0x02: 'IS-136 (TIA/EIA-136)',
|
|
0x03: 'UTRAN', 0x04: 'TETRA', 0x05: 'cdma2000 1xRTT',
|
|
0x06: 'cdma2000 HRPD', 0x07: 'E-UTRAN', 0x08: 'eHRPD', 0x0A: 'NR',
|
|
}
|
|
|
|
_BATTERY_NAMES = {
|
|
0x00: 'very low', 0x01: 'low', 0x02: 'average', 0x03: 'good', 0x05: 'full',
|
|
}
|
|
|
|
_ME_STATUS_NAMES = {0x00: 'idle', 0x01: 'not idle'}
|
|
|
|
_SEARCH_MODE_NAMES = {0x00: 'manual', 0x01: 'automatic'}
|
|
|
|
|
|
def _decode_datetime(val):
|
|
"""Decode TS 23.040 Service-Centre-Time-Stamp (7 bytes) into a string."""
|
|
if len(val) < 7:
|
|
return None
|
|
b = val[:7]
|
|
if any((x >> 4) > 9 or (x & 0x0F) > 9 for x in b[:6]):
|
|
return None
|
|
bcd = lambda x: (x >> 4) * 10 + (x & 0x0F)
|
|
yy, mm, dd, hh, mi, ss = (bcd(x) for x in b[:6])
|
|
if not (1 <= mm <= 12 and 1 <= dd <= 31 and hh <= 23 and mi <= 59 and ss <= 59):
|
|
return None
|
|
tz_raw = b[6]
|
|
if (tz_raw & 0x0F) == 0x0F:
|
|
tz_str = 'unknown'
|
|
else:
|
|
tz_neg = bool(tz_raw & 0x08)
|
|
tz_q = (tz_raw & 0x07) * 10 + (tz_raw >> 4)
|
|
tz_str = f"{'-' if tz_neg else '+'}{tz_q // 4:02d}:{(tz_q % 4) * 15:02d}"
|
|
return f'20{yy:02d}-{mm:02d}-{dd:02d} {hh:02d}:{mi:02d}:{ss:02d} (UTC{tz_str})'
|
|
|
|
|
|
def _decode_local_info(tag, value):
|
|
"""Decode a PLI local-information TLV value into a display dict."""
|
|
if tag == PLI_LOCATION_INFO:
|
|
if len(value) >= 7:
|
|
plmn = _decode_plmn(value[:3]) or {}
|
|
lac = value[3:5].hex().upper()
|
|
cell = value[5:].hex().upper()
|
|
loc = f"MCC {plmn.get('mcc', '?')} MNC {plmn.get('mnc', '?')} · LAC 0x{lac} · Cell 0x{cell}"
|
|
return {'label': 'Location', 'value': loc}
|
|
elif tag == PLI_IMEI:
|
|
imei = _decode_imei(value)
|
|
if imei:
|
|
return {'label': 'IMEI', 'value': imei}
|
|
elif tag == PLI_DATETIME:
|
|
dt = _decode_datetime(value)
|
|
if dt:
|
|
return {'label': 'Date/time', 'value': dt}
|
|
elif tag == PLI_LANGUAGE:
|
|
lang = value.decode('ascii', 'replace').strip() or value.hex().upper()
|
|
return {'label': 'Language', 'value': lang}
|
|
elif tag == PLI_ACCESS_TECH:
|
|
names = [_ACCESS_TECH_NAMES.get(b, f'0x{b:02X}') for b in value]
|
|
return {'label': 'Access technology', 'value': ', '.join(names)}
|
|
elif tag == PLI_TIMING_ADVANCE:
|
|
if len(value) >= 2:
|
|
status = _ME_STATUS_NAMES.get(value[0], f'0x{value[0]:02X}')
|
|
return {'label': 'Timing advance', 'value': f'{status}, TA {value[1]}'}
|
|
elif tag == PLI_BATTERY:
|
|
if value:
|
|
return {'label': 'Battery', 'value': _BATTERY_NAMES.get(value[0], f'0x{value[0]:02X}')}
|
|
elif tag == PLI_SEARCH_MODE:
|
|
if value:
|
|
return {'label': 'Search mode', 'value': _SEARCH_MODE_NAMES.get(value[0], f'0x{value[0]:02X}')}
|
|
elif tag == PLI_NMR:
|
|
return {'label': 'Network measurement results', 'value': value.hex().upper()}
|
|
return None
|
|
|
|
|
|
# TS 102 223 §8.8 — Duration data object: [time unit][time interval]
|
|
_TIME_UNITS = {0x00: 'minutes', 0x01: 'seconds', 0x02: 'tenths of seconds'}
|
|
|
|
|
|
def _decode_duration(value):
|
|
"""Decode a Duration data object value (time unit + time interval)."""
|
|
if len(value) < 2:
|
|
return None
|
|
return {'value': value[1], 'unit': _TIME_UNITS.get(value[0], f'unit 0x{value[0]:02X}')}
|
|
|
|
|
|
def _decode_tr_response(body):
|
|
"""Decode the TLVs of a TERMINAL RESPONSE body.
|
|
|
|
Returns a dict with the Result (code/name), and any additional
|
|
information: Duration (0x04), Item Identifier (0x05) and the
|
|
PROVIDE LOCAL INFORMATION data objects.
|
|
"""
|
|
result = {}
|
|
local = {}
|
|
for tag, _length, value in parse_tlv(body):
|
|
if tag in (0x03, 0x83) and value:
|
|
code = value[0]
|
|
result['code'] = f'0x{code:02X}'
|
|
result['name'] = TR_RESULTS.get(code)
|
|
result['raw'] = value.hex().upper()
|
|
elif tag == 0x04: # Duration (POLL INTERVAL)
|
|
result['duration'] = _decode_duration(value)
|
|
elif tag == 0x05 and value: # Item Identifier (SELECT ITEM)
|
|
result['item_identifier'] = value[0]
|
|
else:
|
|
info = _decode_local_info(tag, value)
|
|
if info:
|
|
local[info['label']] = info['value']
|
|
if local:
|
|
result['local_info'] = local
|
|
return result or None
|
|
|
|
|
|
def _decode_tr_result(body):
|
|
"""Back-compat wrapper returning the Result TLV of a TERMINAL RESPONSE."""
|
|
return _decode_tr_response(body)
|
|
|
|
|
|
# TS 102 221 Table 11.5 — file descriptor byte
|
|
_FILE_TYPES = {
|
|
0b000: 'Working EF',
|
|
0b001: 'Internal EF',
|
|
0b111: 'DF or ADF',
|
|
}
|
|
_EF_STRUCTURES = {
|
|
0b000: 'no information',
|
|
0b001: 'transparent',
|
|
0b010: 'linear fixed',
|
|
0b110: 'cyclic',
|
|
}
|
|
_LIFE_CYCLE = {
|
|
0x00: 'no information given',
|
|
0x01: 'creation state',
|
|
0x03: 'initialization state',
|
|
0x05: 'operational state (activated)',
|
|
0x07: 'operational state (deactivated)',
|
|
0x0C: 'termination state',
|
|
0x0D: 'termination state (permanently)',
|
|
}
|
|
|
|
|
|
def _decode_file_descriptor(value):
|
|
"""Decode a file descriptor byte string (TS 102 221 Table 11.5)."""
|
|
if not value:
|
|
return {}
|
|
b = value[0]
|
|
ft = (b >> 3) & 0x07
|
|
result = {
|
|
'shareable': 'shareable' if (b & 0x40) else 'not shareable',
|
|
'file_type': _FILE_TYPES.get(ft, 'RFU'),
|
|
}
|
|
if ft in (0b000, 0b001): # EF
|
|
result['structure'] = _EF_STRUCTURES.get(b & 0x07, 'RFU')
|
|
if len(value) >= 2:
|
|
result['data_coding'] = f'0x{value[1]:02X}'
|
|
if len(value) >= 4:
|
|
result['record_length'] = int.from_bytes(value[2:4], 'big')
|
|
if len(value) >= 5:
|
|
result['num_records'] = value[4]
|
|
elif len(value) >= 2:
|
|
result['num_dfs_efs'] = value[1]
|
|
return result
|
|
|
|
|
|
def _decode_fcp(data):
|
|
"""Decode an FCP/FCI/FMD template (TS 102 221 §11.1.1.3)."""
|
|
result = {}
|
|
for tag, _length, value in parse_tlv(data):
|
|
if tag in (0x62, 0x64): # outer template — recurse
|
|
inner = _decode_fcp(value)
|
|
inner['template'] = 'FCP' if tag == 0x62 else 'FMD'
|
|
result.update(inner)
|
|
elif tag == 0x82:
|
|
result['file_descriptor'] = _decode_file_descriptor(value)
|
|
elif tag == 0x83:
|
|
fid = value.hex().upper()
|
|
result['file_id'] = fid
|
|
if fid.lower() in KNOWN_FIDS:
|
|
result['file_id_name'] = KNOWN_FIDS[fid.lower()]
|
|
elif tag == 0x84:
|
|
result['df_name'] = value.hex().upper()
|
|
elif tag == 0x88:
|
|
result['sfi'] = f'0x{value[0]:02X}' if value else None
|
|
elif tag == 0x8A:
|
|
result['life_cycle'] = _LIFE_CYCLE.get(value[0] if value else 0, f'0x{(value[0] if value else 0):02X}')
|
|
elif tag == 0xAB:
|
|
result['short_ef_id'] = value.hex().upper()
|
|
return result
|
|
|
|
|
|
def _decode_auth_3g(data):
|
|
"""Decode a 3G AUTHENTICATE response (tag DB success / DC sync-fail)."""
|
|
tag = data[0]
|
|
if tag == 0xDC: # synchronisation failure → length byte + AUTS
|
|
if len(data) >= 2:
|
|
auts_len = data[1]
|
|
return {'type': '3G', 'status': 'sync fail',
|
|
'auts': data[2:2 + auts_len].hex().upper()}
|
|
return {'type': '3G', 'status': 'sync fail', 'auts': data[1:].hex().upper()}
|
|
# tag 0xDB: success → length-prefixed RES, CK, IK, (KC)
|
|
result = {'type': '3G', 'status': 'success'}
|
|
i = 1
|
|
for name in ('res', 'ck', 'ik', 'kc'):
|
|
if i >= len(data):
|
|
break
|
|
ln = data[i]
|
|
i += 1
|
|
result[name] = data[i:i + ln].hex().upper()
|
|
i += ln
|
|
return result
|
|
|
|
|
|
def _decode_auth(data):
|
|
"""Decode an AUTHENTICATE response (GSM SRES+Kc, or 3G tag DB/DC)."""
|
|
if not data:
|
|
return {}
|
|
if data[0] in (0xDB, 0xDC):
|
|
return _decode_auth_3g(data)
|
|
# GSM: SRES (4 bytes) + Kc (8 bytes)
|
|
if len(data) >= 12:
|
|
return {
|
|
'type': 'GSM',
|
|
'sres': data[:4].hex().upper(),
|
|
'kc': data[4:12].hex().upper(),
|
|
}
|
|
return {'type': 'GSM', 'raw': data.hex().upper()}
|
|
|
|
|
|
def _decode_response_for(ins, data):
|
|
"""Decode response data using the command identified by INS."""
|
|
if ins == 0xA4: # SELECT → FCP/FCI template
|
|
return _decode_fcp(data)
|
|
if ins in (0x88, 0x89): # AUTHENTICATE → SRES/Kc or RES/CK/IK
|
|
return _decode_auth(data)
|
|
return None
|
|
|
|
|
|
# ──────────────────── Command-body decoders ────────────────────
|
|
|
|
AUTH_CONTEXTS = {
|
|
0: 'GSM',
|
|
1: '3G (UMTS)',
|
|
2: 'VGC/VBS',
|
|
4: 'GBA',
|
|
}
|
|
|
|
|
|
def _decode_auth_cmd(data, p2):
|
|
"""Decode an AUTHENTICATE command body (RAND / RAND+AUTN)."""
|
|
ctx = p2 & 0x07
|
|
result = {'context': AUTH_CONTEXTS.get(ctx, f'unknown ({ctx})')}
|
|
if ctx in (0, 1) and data:
|
|
i = 0
|
|
if i < len(data):
|
|
rlen = data[i]
|
|
i += 1
|
|
result['rand'] = data[i:i + rlen].hex().upper()
|
|
i += rlen
|
|
if ctx == 1 and i < len(data): # 3G → AUTN
|
|
alen = data[i]
|
|
i += 1
|
|
result['autn'] = data[i:i + alen].hex().upper()
|
|
return result
|
|
|
|
|
|
# TS 102 223 §8.25 — Event list values
|
|
EVENT_TYPES = {
|
|
0x00: 'MT call', 0x01: 'Call connected', 0x02: 'Call disconnected',
|
|
0x03: 'Location status', 0x04: 'User activity', 0x05: 'Idle screen available',
|
|
0x06: 'Card reader status', 0x07: 'Language selection',
|
|
0x08: 'Browser termination', 0x09: 'Data available',
|
|
0x0A: 'Channel status', 0x0B: 'Access Technology Change',
|
|
0x0C: 'Display parameters changed', 0x0D: 'Local connection',
|
|
0x0E: 'Network Search Mode Change', 0x0F: 'Browsing status',
|
|
0x10: 'Frames Information Change', 0x11: 'I-WLAN Access Status',
|
|
0x12: 'Network Rejection', 0x13: 'HCI Connectivity',
|
|
0x14: 'Change of UICC Access', 0x15: 'CSG Cell Change',
|
|
0x16: 'Contactless state request', 0x17: 'Profile Container',
|
|
0x18: 'LTE D2D Discovery Monitoring', 0x19: 'LTE D2D Communication Monitoring',
|
|
0x1A: 'LTE D2D Announcement Response', 0x1B: 'LTE D2D Revocation',
|
|
0x1C: 'LTE D2D Application Port', 0x1D: 'LTE D2D Security Recovery',
|
|
0x1E: 'Off-net Emergency Call', 0x1F: 'ECall Over IMS',
|
|
0x20: 'EARFCN Update', 0x21: 'SCEF Channel Status',
|
|
}
|
|
|
|
LOCATION_STATUS = {
|
|
0x00: 'Normal service',
|
|
0x01: 'Limited service',
|
|
0x02: 'No service',
|
|
}
|
|
|
|
|
|
def _decode_bcd_address(data):
|
|
"""Decode a [TON/NPI + BCD digits] address into a string."""
|
|
if not data:
|
|
return ''
|
|
ton = (data[0] >> 4) & 0x07 # bits 6-4 (bit 7 is the extension bit)
|
|
digits = []
|
|
for b in data[1:]:
|
|
lo, hi = b & 0x0F, (b >> 4) & 0x0F
|
|
if lo <= 9:
|
|
digits.append(str(lo))
|
|
elif lo == 0x0F:
|
|
break
|
|
if hi <= 9:
|
|
digits.append(str(hi))
|
|
elif hi == 0x0F:
|
|
break
|
|
num = ''.join(digits)
|
|
if ton == 1: # international
|
|
num = '+' + num
|
|
return num
|
|
|
|
|
|
# TS 23.038 — GSM 7-bit default alphabet
|
|
GSM7_ALPHABET = (
|
|
'@\u00a3$\u00a5\u00e8\u00e9\u00f9\u00ec\u00f2\u00c7\n\u00d8\u00f8\r\u00c5\u00e5'
|
|
'\u0394_\u03a6\u0393\u039b\u03a9\u03a0\u03a8\u03a3\u0398\u039e\u001b\u00c6\u00e6\u00df\u00c9'
|
|
' !"#\u00a4%&\'()*+,-./'
|
|
'0123456789:;<=>?'
|
|
'\u00a1ABCDEFGHIJKLMNO'
|
|
'PQRSTUVWXYZ\u00c4\u00d6\u00d1\u00dc\u00a7'
|
|
'\u00bfabcdefghijklmno'
|
|
'pqrstuvwxyz\u00e4\u00f6\u00f1\u00fc\u00e0'
|
|
)
|
|
|
|
GSM7_EXTENSION = {
|
|
0x0A: '\n', 0x14: '^', 0x28: '{', 0x29: '}', 0x2F: '\\',
|
|
0x3C: '[', 0x3D: '~', 0x3E: ']', 0x40: '|', 0x65: '\u20ac',
|
|
}
|
|
|
|
|
|
def _decode_gsm7(data, num_chars):
|
|
"""Unpack GSM 7-bit packed septets and decode to text."""
|
|
septets = []
|
|
bitbuf = 0
|
|
bitcount = 0
|
|
for byte in data:
|
|
bitbuf |= byte << bitcount
|
|
bitcount += 8
|
|
while bitcount >= 7:
|
|
septets.append(bitbuf & 0x7F)
|
|
bitbuf >>= 7
|
|
bitcount -= 7
|
|
if num_chars is not None:
|
|
septets = septets[:num_chars]
|
|
text = []
|
|
i = 0
|
|
while i < len(septets):
|
|
s = septets[i]
|
|
if s == 0x1B and i + 1 < len(septets):
|
|
text.append(GSM7_EXTENSION.get(septets[i + 1], ' '))
|
|
i += 2
|
|
else:
|
|
text.append(GSM7_ALPHABET[s] if s < len(GSM7_ALPHABET) else '?')
|
|
i += 1
|
|
return ''.join(text)
|
|
|
|
|
|
def _decode_dcs(dcs):
|
|
"""Decode TP-DCS into (encoding, message_class).
|
|
|
|
Alphabet is selected by DCS bits 3-2: 0=GSM 7-bit, 1=8-bit data, 2=UCS2.
|
|
"""
|
|
group = dcs & 0xC0
|
|
if group in (0x00, 0xC0):
|
|
alpha = (dcs >> 2) & 0x03
|
|
encoding = {0: 'GSM 7-bit', 1: '8-bit data', 2: 'UCS2'}.get(alpha, 'reserved')
|
|
else:
|
|
encoding = '8-bit data'
|
|
return encoding, (dcs & 0x03)
|
|
|
|
|
|
def _decode_dcs_full(dcs):
|
|
"""Decode TP-DCS into a rich dict (TS 23.038 §4).
|
|
|
|
Returns encoding/msg_class (same as _decode_dcs) plus the coding
|
|
group name and group-specific flags: compression, message class
|
|
presence, and Message Waiting Indication details.
|
|
"""
|
|
encoding, msg_class = _decode_dcs(dcs)
|
|
result = {'hex': f'{dcs:02x}', 'encoding': encoding, 'msg_class': msg_class}
|
|
group = dcs >> 4
|
|
if group in (0x0, 0x1):
|
|
result['group'] = ('General Data Coding indication'
|
|
if group == 0 else 'Message Marked for Automatic Deletion')
|
|
result['compressed'] = bool(dcs & 0x20)
|
|
result['has_class'] = bool(dcs & 0x10)
|
|
elif group in (0xC, 0xD, 0xE):
|
|
result['group'] = 'Message Waiting Indication'
|
|
result['action'] = 'discard' if group == 0xC else 'store'
|
|
result['sense'] = 'active' if (dcs & 0x08) else 'inactive'
|
|
result['indication'] = {0: 'voicemail', 1: 'fax', 2: 'email', 3: 'other'}.get(dcs & 0x03)
|
|
elif group == 0xF:
|
|
result['group'] = 'Data coding / message class'
|
|
else: # 0x8..0xB reserved
|
|
result['group'] = 'reserved'
|
|
return result
|
|
|
|
|
|
# TS 23.040 §9.2.3.9 — TP-Protocol-Identifier values (SMS-DELIVER / SMS-SUBMIT)
|
|
PID_NAMES = {
|
|
0x00: 'SME-to-SME (implicit)',
|
|
0x20: 'Telematic: implicit',
|
|
0x21: 'Telematic: telex',
|
|
0x22: 'Telematic: group 3 telefax',
|
|
0x23: 'Telematic: group 4 telefax',
|
|
0x24: 'Telematic: voice telephone',
|
|
0x25: 'Telematic: ERMES',
|
|
0x26: 'Telematic: national paging',
|
|
0x27: 'Telematic: videotex',
|
|
0x28: 'Telematic: teletex (unspecified)',
|
|
0x2A: 'Telematic: teletex (CSPDN)',
|
|
0x2D: 'Telematic: teletex (ISDN)',
|
|
0x30: 'Message handling facility',
|
|
0x31: 'X.400-based MHS',
|
|
0x32: 'Internet Electronic Mail',
|
|
0x3F: 'GSM/UMTS mobile station',
|
|
0x40: 'Short Message Type 0',
|
|
0x41: 'Replace Short Message Type 1',
|
|
0x42: 'Replace Short Message Type 2',
|
|
0x43: 'Replace Short Message Type 3',
|
|
0x44: 'Replace Short Message Type 4',
|
|
0x45: 'Replace Short Message Type 5',
|
|
0x46: 'Replace Short Message Type 6',
|
|
0x47: 'Replace Short Message Type 7',
|
|
0x48: 'Device Triggering Short Message',
|
|
0x5F: 'Return Call Message',
|
|
0x7C: 'ANSI-136 R-DATA',
|
|
0x7D: 'ME Data download',
|
|
0x7E: 'ME De-personalization Short Message',
|
|
0x7F: '(U)SIM Data download',
|
|
}
|
|
|
|
|
|
def _decode_pid(pid):
|
|
return PID_NAMES.get(pid)
|
|
|
|
|
|
# TS 23.040 §9.2.3.24 — User Data Header Information Element Identifiers
|
|
IEI_NAMES = {
|
|
0x00: 'Concatenated short messages, 8-bit reference number',
|
|
0x01: 'Special SMS Message Indication',
|
|
0x04: 'Application port addressing scheme, 8 bit address',
|
|
0x05: 'Application port addressing scheme, 16 bit address',
|
|
0x06: 'SMSC Control Parameters',
|
|
0x07: 'UDH Source Indicator',
|
|
0x08: 'Concatenated short message, 16-bit reference number',
|
|
0x09: 'Wireless Control Message Protocol',
|
|
0x0A: 'Text Formatting',
|
|
0x0B: 'Predefined Sound',
|
|
0x0C: 'User Defined Sound',
|
|
0x0D: 'Predefined Animation',
|
|
0x0E: 'Large Animation',
|
|
0x0F: 'Small Animation',
|
|
0x10: 'Large Picture',
|
|
0x11: 'Small Picture',
|
|
0x12: 'Variable Picture',
|
|
0x13: 'User prompt indicator',
|
|
0x14: 'Extended Object',
|
|
0x15: 'Reused Extended Object',
|
|
0x16: 'Compression Control',
|
|
0x17: 'Object Distribution Indicator',
|
|
0x18: 'Standard WVG object',
|
|
0x19: 'Character Size WVG object',
|
|
0x1A: 'Extended Object Data Request Command',
|
|
0x20: 'RFC 5322 E-Mail Header',
|
|
0x21: 'Hyperlink format element',
|
|
0x22: 'Reply Address Element',
|
|
0x23: 'Enhanced Voice Mail Information',
|
|
0x24: 'National Language Single Shift',
|
|
0x25: 'National Language Locking Shift',
|
|
0x26: 'Filler',
|
|
}
|
|
|
|
_SPECIAL_SMS_TYPES = {0: 'voice', 1: 'fax', 2: 'email', 3: 'other'}
|
|
|
|
|
|
def _decode_udh(udh):
|
|
"""Parse a TP-User-Data-Header byte string into a list of IEI dicts.
|
|
|
|
Each element is ``{'iei', 'name', 'length', 'hex'}`` plus an IE-specific
|
|
``'data'`` dict for the common cases (concatenation, application port,
|
|
special SMS indication).
|
|
"""
|
|
elements = []
|
|
i = 0
|
|
while i + 2 <= len(udh):
|
|
iei = udh[i]
|
|
length = udh[i + 1]
|
|
data = udh[i + 2:i + 2 + length]
|
|
i += 2 + length
|
|
el = {'iei': f'0x{iei:02X}', 'name': IEI_NAMES.get(iei),
|
|
'length': length, 'hex': data.hex().upper()}
|
|
if iei == 0x00 and length >= 3: # concatenated, 8-bit reference
|
|
el['data'] = {'reference': data[0], 'max': data[1], 'seq': data[2]}
|
|
elif iei == 0x08 and length >= 4: # concatenated, 16-bit reference
|
|
el['data'] = {'reference': int.from_bytes(data[:2], 'big'),
|
|
'max': data[2], 'seq': data[3]}
|
|
elif iei == 0x01 and length >= 2: # special SMS message indication
|
|
el['data'] = {'store': bool(data[0] & 0x80),
|
|
'indication': _SPECIAL_SMS_TYPES.get(data[0] & 0x03),
|
|
'count': data[1]}
|
|
elif iei == 0x04 and length >= 2: # application port, 8-bit
|
|
el['data'] = {'dest_port': data[0], 'orig_port': data[1]}
|
|
elif iei == 0x05 and length >= 4: # application port, 16-bit
|
|
el['data'] = {'dest_port': int.from_bytes(data[:2], 'big'),
|
|
'orig_port': int.from_bytes(data[2:4], 'big')}
|
|
elements.append(el)
|
|
return elements
|
|
|
|
|
|
def _decode_vp_relative(v):
|
|
"""Decode a 1-octet TP-Validity-Period (relative format, TS 23.040 §9.2.3.12.1)."""
|
|
if 0 <= v <= 143:
|
|
return f'{(v + 1) * 5} min'
|
|
if 144 <= v <= 167:
|
|
hours = 12 + (v - 143) // 2
|
|
mins = ((v - 143) % 2) * 30
|
|
return f'{hours}h{mins:02d}m'
|
|
if 168 <= v <= 196:
|
|
return f'{v - 166} d'
|
|
if 197 <= v <= 255:
|
|
return f'{v - 192} wk'
|
|
return None
|
|
|
|
|
|
def _decode_8bit_text(data):
|
|
"""Best-effort printable text for 8-bit TP-UD data.
|
|
|
|
If every byte is ASCII (<= 0x7F) or every byte has the high bit set
|
|
(>= 0x80, latin-1), decode to a printable string with non-printable
|
|
characters replaced by '·'. Mixed ranges are treated as binary and
|
|
return None.
|
|
"""
|
|
if not data:
|
|
return None
|
|
if all(b <= 0x7F for b in data):
|
|
return ''.join(chr(b) if 0x20 <= b < 0x7F else '\u00b7' for b in data)
|
|
if all(b >= 0x80 for b in data):
|
|
return ''.join(chr(b) if b >= 0xA0 else '\u00b7' for b in data)
|
|
return None
|
|
|
|
|
|
def _decode_gsm7_octets(data):
|
|
"""Decode 8-bit-per-octet GSM 7-bit default alphabet text (TS 102 221)."""
|
|
out = []
|
|
i = 0
|
|
while i < len(data):
|
|
b = data[i]
|
|
if b == 0x1B and i + 1 < len(data):
|
|
out.append(GSM7_EXTENSION.get(data[i + 1], ' '))
|
|
i += 2
|
|
else:
|
|
out.append(GSM7_ALPHABET[b] if b < len(GSM7_ALPHABET) else '?')
|
|
i += 1
|
|
return ''.join(out)
|
|
|
|
|
|
def _decode_annex_a(raw):
|
|
"""Decode a TS 102 221 Annex A text string (GsmOrUcs2).
|
|
|
|
Magic prefix 0x80/0x81/0x82 → UCS-2 variants; otherwise GSM 7-bit
|
|
default alphabet coded one octet per character.
|
|
"""
|
|
if not raw:
|
|
return ''
|
|
if raw == b'\xff' * len(raw):
|
|
return ''
|
|
if raw[0] == 0x80:
|
|
return raw[1:].decode('utf_16_be', 'replace')
|
|
if raw[0] == 0x81 and len(raw) >= 3:
|
|
num_chars = raw[1]
|
|
base_ptr = raw[2] << 7
|
|
out = []
|
|
for ch in raw[3:3 + num_chars]:
|
|
if ch & 0x80:
|
|
out.append(chr((ch & 0x7F) + base_ptr))
|
|
else:
|
|
out.append(GSM7_ALPHABET[ch] if ch < len(GSM7_ALPHABET) else '?')
|
|
return ''.join(out)
|
|
if raw[0] == 0x82 and len(raw) >= 4:
|
|
num_chars = raw[1]
|
|
base_ptr = (raw[2] << 8) | raw[3]
|
|
out = []
|
|
for ch in raw[4:4 + num_chars]:
|
|
if ch & 0x80:
|
|
out.append(chr((ch & 0x7F) + base_ptr))
|
|
else:
|
|
out.append(GSM7_ALPHABET[ch] if ch < len(GSM7_ALPHABET) else '?')
|
|
return ''.join(out)
|
|
return _decode_gsm7_octets(raw)
|
|
|
|
|
|
def _decode_dcs_text(raw):
|
|
"""Decode a Text String (TS 102 223 §8.15): DCS byte + text."""
|
|
if not raw or len(raw) < 2:
|
|
return raw.hex() if raw else ''
|
|
dcs = raw[0]
|
|
data = raw[1:]
|
|
if (dcs & 0x0C) == 0x08:
|
|
return data.decode('utf_16_be', 'replace')
|
|
if (dcs & 0x0C) == 0x04:
|
|
return data.decode('latin-1', 'replace')
|
|
return _decode_gsm7_octets(data)
|
|
|
|
|
|
def _decode_sm_tpdu(data):
|
|
"""Decode a GSM 03.40 (TS 23.040) SM TPDU (SMS-DELIVER / SMS-SUBMIT)."""
|
|
if not data:
|
|
return {}
|
|
mti = data[0] & 0x03
|
|
mti_names = {0: 'SMS-DELIVER', 1: 'SMS-SUBMIT', 2: 'SMS-STATUS-REPORT', 3: 'SMS-COMMAND'}
|
|
udhi = bool(data[0] & 0x40)
|
|
result = {'mti': mti_names.get(mti, f'unknown ({mti})'), 'udhi': udhi}
|
|
|
|
if mti == 0: # SMS-DELIVER
|
|
i = 1
|
|
if i < len(data):
|
|
oa_len = data[i]
|
|
i += 1
|
|
oa_bytes = 1 + (oa_len + 1) // 2 # TON/NPI + BCD digits
|
|
result['oa'] = _decode_bcd_address(data[i:i + oa_bytes])
|
|
i += oa_bytes
|
|
if i + 1 < len(data):
|
|
result['pid'] = data[i]
|
|
result['dcs'] = data[i + 1]
|
|
i += 2
|
|
pid_name = _decode_pid(result['pid'])
|
|
if pid_name:
|
|
result['pid_name'] = pid_name
|
|
result['dcs_info'] = _decode_dcs_full(result['dcs'])
|
|
result['encoding'] = result['dcs_info']['encoding']
|
|
result['msg_class'] = result['dcs_info']['msg_class']
|
|
scts = _decode_datetime(data[i:i + 7]) # TP-SCTS (service centre time stamp)
|
|
if scts:
|
|
result['scts'] = scts
|
|
i += 7
|
|
if i < len(data):
|
|
udl = data[i]
|
|
i += 1
|
|
result = _decode_ud(data[i:], udl, result.get('dcs', 0), udhi, result)
|
|
elif mti == 1: # SMS-SUBMIT
|
|
vpf = (data[0] >> 3) & 0x03
|
|
i = 1
|
|
if i < len(data):
|
|
result['mr'] = data[i] # TP-MR
|
|
i += 1
|
|
if i < len(data):
|
|
da_len = data[i]
|
|
i += 1
|
|
da_bytes = 1 + (da_len + 1) // 2
|
|
result['da'] = _decode_bcd_address(data[i:i + da_bytes])
|
|
i += da_bytes
|
|
if i + 1 < len(data):
|
|
result['pid'] = data[i]
|
|
result['dcs'] = data[i + 1]
|
|
i += 2
|
|
pid_name = _decode_pid(result['pid'])
|
|
if pid_name:
|
|
result['pid_name'] = pid_name
|
|
result['dcs_info'] = _decode_dcs_full(result['dcs'])
|
|
result['encoding'] = result['dcs_info']['encoding']
|
|
result['msg_class'] = result['dcs_info']['msg_class']
|
|
if vpf == 1: # relative: 1-octet validity period
|
|
if i < len(data):
|
|
vp = _decode_vp_relative(data[i])
|
|
if vp:
|
|
result['vp'] = vp
|
|
i += 1
|
|
elif vpf == 2: # absolute: 7-octet validity period (semi-octet time)
|
|
vp = _decode_datetime(data[i:i + 7])
|
|
result['vp'] = vp if vp else data[i:i + 7].hex().upper()
|
|
i += 7
|
|
elif vpf == 3: # enhanced: 7-octet validity period
|
|
result['vp'] = data[i:i + 7].hex().upper()
|
|
i += 7
|
|
if i < len(data):
|
|
udl = data[i]
|
|
i += 1
|
|
result = _decode_ud(data[i:], udl, result.get('dcs', 0), udhi, result)
|
|
|
|
return result
|
|
|
|
|
|
def _decode_ud(ud, udl, dcs, udhi, result):
|
|
encoding, msg_class = _decode_dcs(dcs)
|
|
result['encoding'] = encoding
|
|
result['msg_class'] = msg_class
|
|
|
|
pid = result.get('pid')
|
|
if pid == 0x7F: # SIM data download → secured packet (show hex)
|
|
result['pid_name'] = 'SIM data download (secured packet)'
|
|
result['payload'] = ud[:udl].hex().upper()
|
|
return result
|
|
|
|
if udhi and ud:
|
|
udhl = ud[0]
|
|
result['udhl'] = udhl
|
|
result['udh'] = _decode_udh(ud[1:1 + udhl])
|
|
body = ud[1 + udhl:]
|
|
if encoding == 'GSM 7-bit':
|
|
fill_bits = (udhl + 1) * 8
|
|
n = udl - ((fill_bits + 6) // 7)
|
|
result['text'] = _decode_gsm7(body, n)
|
|
elif encoding == 'UCS2':
|
|
result['text'] = body[:udl].decode('utf-16-be', errors='replace')
|
|
else:
|
|
result['payload'] = body[:udl].hex().upper()
|
|
text = _decode_8bit_text(body[:udl])
|
|
if text is not None:
|
|
result['text'] = text
|
|
else:
|
|
if encoding == 'GSM 7-bit':
|
|
result['text'] = _decode_gsm7(ud, udl)
|
|
elif encoding == 'UCS2':
|
|
result['text'] = ud[:udl].decode('utf-16-be', errors='replace')
|
|
else:
|
|
result['payload'] = ud[:udl].hex().upper()
|
|
text = _decode_8bit_text(ud[:udl])
|
|
if text is not None:
|
|
result['text'] = text
|
|
|
|
return result
|
|
|
|
|
|
def _decode_cb_page(value):
|
|
"""Decode a CELL BROADCAST DOWNLOAD CB page (TS 31.111 §8.5 / TS 23.041).
|
|
|
|
Layout: serial number (2), message identifier (2), DCS (1), page
|
|
parameter (1), content (up to 82 octets). Content is returned as raw
|
|
hex (no text decode).
|
|
"""
|
|
if len(value) < 6:
|
|
return {'content': value.hex().upper()}
|
|
serial = value[0:2].hex().upper()
|
|
message_id = value[2:4].hex().upper()
|
|
dcs = value[4]
|
|
page_byte = value[5]
|
|
total_pages = (page_byte >> 4) & 0x0F
|
|
page_num = page_byte & 0x0F
|
|
encoding, msg_class = _decode_dcs(dcs)
|
|
dcs_str = f'0x{dcs:02X} — {encoding}' + (f' (class {msg_class})' if msg_class else '')
|
|
return {
|
|
'serial': serial,
|
|
'message_id': '0x' + message_id,
|
|
'dcs': dcs_str,
|
|
'page': f'{page_num}/{total_pages}',
|
|
'content': value[6:].hex().upper(),
|
|
}
|
|
|
|
|
|
def _decode_envelope(body):
|
|
"""Decode an ENVELOPE command body (TS 102 223 / TS 31.111)."""
|
|
tlvs = parse_tlv(body)
|
|
if not tlvs:
|
|
return {}
|
|
tag, _length, value = tlvs[0]
|
|
result = {'type': ENVELOPE_TYPES.get(tag, f'0x{tag:02X}')}
|
|
inner = parse_tlv(value)
|
|
|
|
if tag == 0xD6: # EVENT DOWNLOAD
|
|
for t, _l, v in inner:
|
|
if t == 0x19: # Event list
|
|
result['events'] = [EVENT_TYPES.get(e, f'0x{e:02X}') for e in v]
|
|
elif t == 0x1B: # Location status
|
|
if v:
|
|
result['location_status'] = LOCATION_STATUS.get(v[0], f'0x{v[0]:02X}')
|
|
elif t == 0x13: # Location information
|
|
li = _decode_local_info(PLI_LOCATION_INFO, v)
|
|
result['location_info'] = li['value'] if li else v.hex().upper()
|
|
elif t in (0x06, 0x86): # Address (caller's number, MT call)
|
|
result['caller'] = _decode_bcd_address(v)
|
|
elif t == 0x1C: # Transaction identifier (MT call)
|
|
if v:
|
|
result['transaction_id'] = v[0]
|
|
elif t in (0x08, 0x88): # Subaddress
|
|
result['subaddress'] = v.hex().upper()
|
|
elif t == 0x02: # Device identities
|
|
result['device_ids'] = v.hex().upper()
|
|
elif tag == 0xD5: # MO SHORT MESSAGE CONTROL
|
|
for t, _l, v in inner:
|
|
if t == 0x06: # Address objects
|
|
if 'smsc' not in result:
|
|
result['smsc'] = _decode_bcd_address(v)
|
|
else:
|
|
result['tp_da'] = _decode_bcd_address(v)
|
|
elif t == 0x13:
|
|
result['location_info'] = v.hex().upper()
|
|
elif t == 0x02:
|
|
result['device_ids'] = v.hex().upper()
|
|
elif tag == 0xD1: # SMS-PP DOWNLOAD
|
|
for t, _l, v in inner:
|
|
if t == 0x06:
|
|
result['smsc'] = _decode_bcd_address(v)
|
|
elif t in (0x0B, 0x8B): # SMS TPDU (SMS-DELIVER)
|
|
result['tpdu'] = _decode_sm_tpdu(v)
|
|
elif t == 0x02:
|
|
result['device_ids'] = v.hex().upper()
|
|
elif tag == 0xD2: # CELL BROADCAST DOWNLOAD
|
|
for t, _l, v in inner:
|
|
if t == 0x02:
|
|
result['device_ids'] = v.hex().upper()
|
|
elif t in (0x0C, 0x8C): # CB page
|
|
result['cb_page'] = _decode_cb_page(v)
|
|
else: # D3 / D4 / D7 — device identities only
|
|
for t, _l, v in inner:
|
|
if t == 0x02:
|
|
result['device_ids'] = v.hex().upper()
|
|
|
|
return result
|
|
|
|
|
|
# ──────────────────── Proactive command-body decoder ────────────────────
|
|
|
|
# TS 102 223 §6.6 data-object tags (base value; comprehension bit masked off)
|
|
_P_CMD_DETAILS = 0x01
|
|
_P_DEVICE_IDS = 0x02
|
|
_P_DURATION = 0x04
|
|
_P_ALPHA_ID = 0x05
|
|
_P_ADDRESS = 0x06
|
|
_P_SMS_TPDU = 0x0B
|
|
_P_TEXT_STRING = 0x0D
|
|
_P_ITEM = 0x0F
|
|
_P_RESPONSE_LEN = 0x11
|
|
_P_EVENT_LIST = 0x19
|
|
|
|
|
|
def _decode_proactive(body):
|
|
"""Decode a FETCH proactive command body (D0 TLV) into a dict.
|
|
|
|
Unwraps the D0 BER-TLV and decodes the command's data objects,
|
|
dispatching on the Type of Command from the Command Details (0x81).
|
|
"""
|
|
if not body:
|
|
return None
|
|
inner = None
|
|
for tag, _length, value in parse_tlv(body):
|
|
if tag == 0xD0:
|
|
inner = parse_tlv(value)
|
|
break
|
|
if inner is None:
|
|
return None
|
|
|
|
cmd_type = None
|
|
result = {}
|
|
items = []
|
|
for tag, _length, value in inner:
|
|
base = tag & 0x7F
|
|
if base == _P_CMD_DETAILS and len(value) >= 2:
|
|
cmd_type = value[1]
|
|
elif base == _P_ALPHA_ID and value:
|
|
result['title'] = _decode_annex_a(value)
|
|
elif base == _P_TEXT_STRING and value:
|
|
result['text'] = _decode_dcs_text(value)
|
|
elif base == _P_ITEM and len(value) >= 2:
|
|
items.append({'id': value[0], 'text': _decode_annex_a(value[1:])})
|
|
elif base == _P_SMS_TPDU and value:
|
|
result['tpdu'] = _decode_sm_tpdu(value)
|
|
elif base == _P_DURATION:
|
|
result['duration'] = _decode_duration(value)
|
|
elif base == _P_RESPONSE_LEN and len(value) >= 2:
|
|
result['response_length'] = {'min': value[0], 'max': value[1]}
|
|
elif base == _P_EVENT_LIST and value:
|
|
result['events'] = [EVENT_TYPES.get(e, f'0x{e:02X}') for e in value]
|
|
elif base == _P_ADDRESS and value:
|
|
result['address'] = _decode_bcd_address(value)
|
|
|
|
if cmd_type is None:
|
|
return None
|
|
result['type'] = CAT_COMMAND_TYPES.get(cmd_type, f'0x{cmd_type:02X}')
|
|
if items:
|
|
result['items'] = items
|
|
return result
|
|
|
|
|
|
# ──────────────────── Decode entry point ────────────────────
|
|
|
|
def _build_summary(result):
|
|
"""Build a concise human-readable description of a decoded command.
|
|
|
|
Used to replace raw hex in the APDU list view. Returns None when
|
|
nothing meaningful is extractable (caller falls back to raw hex).
|
|
Sensitive bodies (PIN, AUTH) are never included.
|
|
"""
|
|
parts = []
|
|
ins = result.get('ins_hex')
|
|
|
|
p1 = result.get('p1')
|
|
p2 = result.get('p2')
|
|
p1txt = p2txt = None
|
|
if 'p1p2' in result:
|
|
p1txt = f"{result['p1p2']['label']}: 0x{result['p1p2']['value']:04X}"
|
|
else:
|
|
if p1:
|
|
p1txt = p1.get('name')
|
|
if not p1txt and p1.get('label') is not None and p1.get('value') is not None:
|
|
p1txt = f"{p1['label']}: {p1['value']}"
|
|
if not p1txt and p1.get('bits'):
|
|
p1txt = ', '.join(p1['bits'])
|
|
if p2:
|
|
p2txt = p2.get('name')
|
|
if not p2txt and p2.get('bits'):
|
|
p2txt = ', '.join(p2['bits'])
|
|
|
|
body = result.get('body')
|
|
bodytxt = None
|
|
if body and ins == 'a4': # SELECT → FID/AID is the object of the command
|
|
bodytxt = body['hex'].upper()
|
|
if body.get('note'):
|
|
bodytxt = f"{bodytxt} ({body['note']})"
|
|
|
|
if ins == 'a4' and p1txt and bodytxt:
|
|
parts.append(f"{p1txt}: {bodytxt}")
|
|
if p2txt and p2txt != 'No indication':
|
|
parts.append(p2txt)
|
|
else:
|
|
if p1txt and p1txt != 'No indication':
|
|
parts.append(p1txt)
|
|
if p2txt and p2txt != 'No indication':
|
|
parts.append(p2txt)
|
|
if bodytxt:
|
|
parts.append(bodytxt)
|
|
|
|
cmd = result.get('cmd')
|
|
if cmd:
|
|
if cmd.get('context'):
|
|
parts.append(cmd['context'])
|
|
if cmd.get('title'):
|
|
parts.append(cmd['title'])
|
|
items = cmd.get('items')
|
|
if items:
|
|
n = len(items)
|
|
parts.append(f"{n} item{'s' if n != 1 else ''}")
|
|
if cmd.get('text'):
|
|
parts.append(cmd['text'])
|
|
if cmd.get('smsc'):
|
|
parts.append(f"SMSC {cmd['smsc']}")
|
|
if cmd.get('events'):
|
|
parts.append(', '.join(cmd['events']))
|
|
if cmd.get('address'):
|
|
parts.append(f"to {cmd['address']}")
|
|
duration = cmd.get('duration')
|
|
if isinstance(duration, dict) and duration.get('value') is not None:
|
|
parts.append(f"{duration['value']} {duration['unit']}")
|
|
tpdu = cmd.get('tpdu')
|
|
if tpdu:
|
|
s = tpdu.get('mti', '')
|
|
if tpdu.get('oa'):
|
|
s += f" from {tpdu['oa']}"
|
|
if tpdu.get('da'):
|
|
s += f" to {tpdu['da']}"
|
|
if tpdu.get('text'):
|
|
s += f" \u00ab{tpdu['text']}\u00bb"
|
|
parts.append(s)
|
|
|
|
if result.get('response_to'):
|
|
parts.append('\u2192 ' + result['response_to'])
|
|
if result.get('response_for'):
|
|
parts.append('response for ' + result['response_for'])
|
|
response = result.get('response')
|
|
if response and response.get('name'):
|
|
parts.append(response['name'])
|
|
|
|
return ', '.join(parts) if parts else None
|
|
|
|
|
|
def decode_message(raw_data, prev=None):
|
|
"""Decode a raw TPDU byte string into a structured dict.
|
|
|
|
Returns None for non-TPDU messages (ATR, PPS, CHANGE, FIDI)
|
|
or un-parseable data. Returns a dict with ins_name, cla, p1, p2,
|
|
p3, body, and sw keys for valid TPDU messages.
|
|
|
|
*prev* optionally carries the previous TPDU's decoded context
|
|
(``{'ins_name': str, 'sw1': str}``) for resolving GET RESPONSE.
|
|
"""
|
|
if not raw_data or len(raw_data) < 5:
|
|
return None
|
|
|
|
cla = raw_data[0]
|
|
ins = raw_data[1]
|
|
p1 = raw_data[2]
|
|
p2 = raw_data[3]
|
|
p3 = raw_data[4]
|
|
|
|
spec = APDU_SPEC.get(ins)
|
|
ins_name = spec['name'] if spec else f'Unknown (0x{ins:02x})'
|
|
|
|
result = {
|
|
'ins_hex': f'{ins:02x}',
|
|
'ins_name': ins_name,
|
|
'cla': decode_cla(cla),
|
|
'p3': p3,
|
|
}
|
|
|
|
# P1 / P2 decode
|
|
if spec:
|
|
if 'p1p2' in spec:
|
|
offset = (p1 << 8) | p2
|
|
result['p1p2'] = {'label': spec['p1p2']['label'], 'value': offset}
|
|
else:
|
|
if 'p1' in spec:
|
|
result['p1'] = _decode_field(spec['p1'], p1)
|
|
if 'p2' in spec:
|
|
result['p2'] = _decode_field(spec['p2'], p2)
|
|
|
|
# Body: at least P3 bytes from byte 5; extra bytes may be SW
|
|
remaining = raw_data[5:]
|
|
extra_total = len(remaining) - p3
|
|
sw_bytes = None
|
|
|
|
if extra_total >= 2:
|
|
sw_candidate = remaining[-2:]
|
|
if sw_candidate[0] in (0x60, 0x61, 0x62, 0x63, 0x64, 0x65,
|
|
0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b,
|
|
0x6c, 0x6d, 0x6e, 0x6f, 0x90, 0x91,
|
|
0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
|
|
0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d,
|
|
0x9e, 0x9f):
|
|
sw_bytes = sw_candidate
|
|
|
|
cmd_body_len = len(remaining) - 2 if sw_bytes else len(remaining)
|
|
|
|
if cmd_body_len > 0:
|
|
body = remaining[:cmd_body_len]
|
|
result['body'] = {'hex': body.hex(), 'size': cmd_body_len}
|
|
|
|
if spec and spec.get('body') and spec['body'].get('label'):
|
|
result['body']['label'] = spec['body']['label']
|
|
if spec and spec.get('body') and spec['body'].get('fids'):
|
|
fids = spec['body']['fids']
|
|
h = body.hex()
|
|
if h in fids:
|
|
result['body']['note'] = fids[h]
|
|
|
|
if ins == 0xA4 and p1 in (0x08, 0x09): # SELECT by path (from MF / current DF)
|
|
result['body']['note'] = _decode_select_path(body.hex())
|
|
|
|
if ins == 0x14:
|
|
response_to = decode_tr_command(body)
|
|
if response_to:
|
|
result['response_to'] = response_to
|
|
result['response'] = _decode_tr_result(body)
|
|
else:
|
|
cat_command = decode_cat(ins, body)
|
|
if cat_command:
|
|
result['cat_command'] = cat_command
|
|
if ins in (0x88, 0x89): # AUTHENTICATE command body
|
|
result['cmd'] = _decode_auth_cmd(body, p2)
|
|
elif ins == 0xC2: # ENVELOPE command body
|
|
result['cmd'] = _decode_envelope(body)
|
|
elif ins == 0x12: # FETCH → proactive command body
|
|
result['cmd'] = _decode_proactive(body)
|
|
|
|
# SW
|
|
if sw_bytes:
|
|
result['sw'] = decode_sw(sw_bytes)
|
|
|
|
# GET RESPONSE context: the response belongs to the previous command
|
|
# if that command ended with SW1 '61' (response data available).
|
|
if ins == 0xC0:
|
|
if prev and prev.get('sw1') == '61':
|
|
result['response_for'] = prev.get('ins_name')
|
|
prev_ins = prev.get('ins')
|
|
if prev_ins is not None and cmd_body_len > 0:
|
|
response = _decode_response_for(prev_ins, remaining[:cmd_body_len])
|
|
if response:
|
|
result['response'] = response
|
|
else:
|
|
result['response_for'] = None
|
|
|
|
result['summary'] = _build_summary(result)
|
|
|
|
return result
|
|
|
|
|
|
# ──────────────────── Sniff-level message types ────────────────────
|
|
|
|
CHANGE_FLAGS = {
|
|
1 << 0: 'Card inserted',
|
|
1 << 1: 'Card ejected',
|
|
1 << 2: 'Reset asserted',
|
|
1 << 3: 'Reset de-asserted',
|
|
1 << 4: 'Waiting time timeout',
|
|
}
|
|
|
|
|
|
def decode_change(flags):
|
|
"""Decode SIMtrace2 sniff_change flags into a list of human-readable names."""
|
|
bits = []
|
|
for mask, name in sorted(CHANGE_FLAGS.items()):
|
|
if flags & mask:
|
|
bits.append(name)
|
|
return {
|
|
'type': 'change',
|
|
'flags_hex': f'{flags:08x}',
|
|
'flags': bits if bits else ['no changes'],
|
|
}
|
|
|
|
|
|
def decode_fidi(raw_data):
|
|
"""Decode a SIMtrace2 sniff_fidi payload (1-byte Fi/Di)."""
|
|
if len(raw_data) < 1:
|
|
return None
|
|
fidi = raw_data[0]
|
|
fi = fidi >> 4
|
|
di = fidi & 0x0f
|
|
fi_table = {0: 372, 1: 372, 2: 558, 3: 744, 4: 1116, 5: 1488, 6: 1860, 7: 0,
|
|
8: 0, 9: 512, 10: 768, 11: 1024, 12: 1536, 13: 2048, 14: 0, 15: 0}
|
|
di_table = {0: 0, 1: 1, 2: 2, 3: 4, 4: 8, 5: 16, 6: 32, 7: 64,
|
|
8: 12, 9: 20, 10: 2, 11: 4, 12: 8, 13: 16, 14: 32, 15: 64}
|
|
return {
|
|
'type': 'fidi',
|
|
'fidi': f'{fidi:02x}',
|
|
'fi': fi,
|
|
'di': di,
|
|
'fi_val': fi_table.get(fi, fi),
|
|
'di_val': di_table.get(di, di),
|
|
}
|
|
|
|
|
|
# ──────────────────── ATR / PPS decoding (ISO 7816-3) ────────────────────
|
|
|
|
# TA1/PPS1: Fi (clock rate conversion factor), f(max), Di (baud rate adjustment)
|
|
_ATR_FI = {0: 372, 1: 372, 2: 558, 3: 744, 4: 1116, 5: 1488, 6: 1860,
|
|
9: 512, 10: 768, 11: 1024, 12: 1536, 13: 2048}
|
|
_ATR_FMAX = {0: 4, 1: 5, 2: 6, 3: 8, 4: 12, 5: 16, 6: 20,
|
|
9: 5, 10: 7.5, 11: 10, 12: 15, 13: 20}
|
|
_ATR_DI = {1: 1, 2: 2, 3: 4, 4: 8, 5: 16, 6: 32, 7: 64, 8: 12, 9: 20}
|
|
|
|
_T_PROTOCOLS = {0: 'T=0', 1: 'T=1', 2: 'T=2', 3: 'T=3', 4: 'T=4', 14: 'T=14', 15: 'T=15'}
|
|
|
|
# TA3 (first TA for T=15): clock stop indicator (bits 8-7) + class indicator (bits 1-3)
|
|
_CLOCK_STOP = {0: 'clock stop not supported', 1: 'state L preferred',
|
|
2: 'state H preferred', 3: 'no preference'}
|
|
_CLASS_BITS = {0x01: 'A', 0x02: 'B', 0x04: 'C'}
|
|
|
|
|
|
def _bit_swap(b):
|
|
"""Reverse the bits of a byte (inverse convention ATR decoding)."""
|
|
return int(f'{b:08b}'[::-1], 2)
|
|
|
|
|
|
def _fidi_dict(fi, di):
|
|
"""Decode an Fi/Di nibble pair into a display dict."""
|
|
entry = {'fi': fi, 'di': di}
|
|
f = _ATR_FI.get(fi)
|
|
d = _ATR_DI.get(di)
|
|
if f is not None:
|
|
entry['f'] = f
|
|
if d is not None:
|
|
entry['d'] = d
|
|
if f is not None and d is not None:
|
|
f_div_d = f / d
|
|
entry['f_div_d'] = int(f_div_d) if f_div_d == int(f_div_d) else f_div_d
|
|
if fi in _ATR_FMAX:
|
|
entry['f_max'] = _ATR_FMAX[fi]
|
|
return entry
|
|
|
|
|
|
def _decode_historical(hist):
|
|
"""Decode ATR historical bytes (ISO 7816-4 §8.1.1)."""
|
|
result = {'raw': hist.hex().upper()}
|
|
cat = hist[0]
|
|
if cat == 0x80 and len(hist) >= 3:
|
|
result['category'] = 'status information (life cycle)'
|
|
result['sw'] = f'{hist[1]:02X}{hist[2]:02X}'
|
|
life_cycle = _LIFE_CYCLE.get(hist[2])
|
|
if life_cycle:
|
|
result['life_cycle'] = life_cycle
|
|
elif cat == 0x8F:
|
|
result['category'] = 'TLV list'
|
|
elif 0x00 <= cat <= 0x7F or 0x90 <= cat <= 0x9F:
|
|
result['category'] = 'proprietary'
|
|
elif 0x81 <= cat <= 0x8E or 0xA0 <= cat <= 0xFE:
|
|
result['category'] = 'reserved'
|
|
elif cat == 0xFF:
|
|
result['category'] = 'default'
|
|
else:
|
|
result['category'] = f'0x{cat:02X}'
|
|
return result
|
|
|
|
|
|
def _decode_atr(data):
|
|
"""Decode an Answer-To-Reset (ISO 7816-3 §8) into a structured dict."""
|
|
if not data:
|
|
return {'type': 'atr', 'raw': ''}
|
|
ts = data[0]
|
|
raw = data.hex().upper()
|
|
if ts not in (0x3B, 0x3F):
|
|
return {'type': 'atr', 'convention': 'unknown', 'raw': raw}
|
|
inverse = ts == 0x3F
|
|
body = data[1:]
|
|
if inverse:
|
|
body = bytes(_bit_swap(b) for b in body)
|
|
|
|
result = {
|
|
'type': 'atr',
|
|
'ts': f'{ts:02X}',
|
|
'convention': 'inverse' if inverse else 'direct',
|
|
'raw': raw,
|
|
}
|
|
if not body:
|
|
return result
|
|
|
|
t0 = body[0]
|
|
result['t0'] = f'{t0:02X}'
|
|
result['historical_len'] = t0 & 0x0F
|
|
|
|
interface = []
|
|
protocols = []
|
|
flags = t0 & 0xF0
|
|
i = 1
|
|
level = 1
|
|
cur_t = None # protocol T governing the TA/TB/TC bytes at this level (None = global)
|
|
|
|
while flags and i < len(body):
|
|
if flags & 0x10: # TA
|
|
b = body[i]
|
|
i += 1
|
|
if level == 1:
|
|
entry = {'name': 'TA1', 'hex': f'{b:02X}'}
|
|
entry.update(_fidi_dict(b >> 4, b & 0x0F))
|
|
elif level == 2:
|
|
entry = {'name': 'TA2', 'hex': f'{b:02X}',
|
|
'specific': bool(b & 0x10),
|
|
'protocol': _T_PROTOCOLS.get(b & 0x0F, f'T={b & 0x0F}')}
|
|
elif cur_t == 15: # first TA for T=15 → clock stop + class indicator
|
|
classes = [name for bit, name in _CLASS_BITS.items() if b & bit]
|
|
entry = {'name': f'TA{level}', 'hex': f'{b:02X}',
|
|
'clock_stop': _CLOCK_STOP.get((b >> 6) & 0x03),
|
|
'classes': classes}
|
|
else: # TA3 for T=1 → IFSC
|
|
entry = {'name': f'TA{level}', 'hex': f'{b:02X}', 'ifsc': b}
|
|
interface.append(entry)
|
|
if flags & 0x20: # TB
|
|
b = body[i]
|
|
i += 1
|
|
if level == 1:
|
|
interface.append({'name': 'TB1', 'hex': f'{b:02X}',
|
|
'programming': 'not used' if b == 0 else f'0x{b:02X}'})
|
|
elif level == 2:
|
|
interface.append({'name': 'TB2', 'hex': f'{b:02X}',
|
|
'programming': 'not used' if b == 0 else f'0x{b:02X}'})
|
|
elif cur_t == 15: # first TB for T=15 → SPU
|
|
interface.append({'name': f'TB{level}', 'hex': f'{b:02X}',
|
|
'spu': 'not used' if b == 0 else f'0x{b:02X}'})
|
|
else: # TB3 for T=1 → BWI/CWI
|
|
interface.append({'name': f'TB{level}', 'hex': f'{b:02X}',
|
|
'bwi': b >> 4, 'cwi': b & 0x0F})
|
|
if flags & 0x40: # TC
|
|
b = body[i]
|
|
i += 1
|
|
if level == 1:
|
|
interface.append({'name': 'TC1', 'hex': f'{b:02X}', 'extra_guard_time': b})
|
|
elif level == 2:
|
|
interface.append({'name': 'TC2', 'hex': f'{b:02X}', 'work_waiting_time': b})
|
|
else:
|
|
interface.append({'name': f'TC{level}', 'hex': f'{b:02X}'})
|
|
if flags & 0x80: # TD
|
|
b = body[i]
|
|
i += 1
|
|
cur_t = b & 0x0F
|
|
protocols.append(_T_PROTOCOLS.get(cur_t, f'T={cur_t}'))
|
|
flags = b & 0xF0
|
|
level += 1
|
|
else:
|
|
flags = 0
|
|
|
|
if interface:
|
|
result['interface'] = interface
|
|
if protocols:
|
|
result['protocols'] = protocols
|
|
|
|
k = result['historical_len']
|
|
if k and i + k <= len(body):
|
|
result['historical'] = _decode_historical(body[i:i + k])
|
|
i += k
|
|
|
|
# TCK present unless only T=0 is proposed (ISO 7816-3 §8.2.5).
|
|
only_t0 = not protocols or protocols == ['T=0']
|
|
if not only_t0 and i < len(body):
|
|
tck = body[i]
|
|
check = 0
|
|
for b in body[:i]:
|
|
check ^= b
|
|
result['tck'] = f'{tck:02X}'
|
|
result['tck_valid'] = check == tck
|
|
|
|
return result
|
|
|
|
|
|
def _decode_pps(data):
|
|
"""Decode a Protocol and Parameter Selection exchange (ISO 7816-3 §9.2)."""
|
|
if not data:
|
|
return {'type': 'pps', 'raw': ''}
|
|
raw = data.hex().upper()
|
|
result = {'type': 'pps', 'raw': raw}
|
|
if data[0] != 0xFF:
|
|
result['note'] = 'missing PPSS'
|
|
return result
|
|
result['ppss'] = 'FF'
|
|
if len(data) < 2:
|
|
return result
|
|
pps0 = data[1]
|
|
result['pps0'] = f'{pps0:02X}'
|
|
result['protocol'] = _T_PROTOCOLS.get(pps0 & 0x0F, f'T={pps0 & 0x0F}')
|
|
i = 2
|
|
if pps0 & 0x10 and i < len(data): # PPS1 → Fi/Di
|
|
pps1 = data[i]
|
|
i += 1
|
|
entry = {'pps1': f'{pps1:02X}'}
|
|
entry.update(_fidi_dict(pps1 >> 4, pps1 & 0x0F))
|
|
result['fi_di'] = entry
|
|
if pps0 & 0x20 and i < len(data): # PPS2 → SPU
|
|
pps2 = data[i]
|
|
i += 1
|
|
result['pps2'] = f'{pps2:02X}'
|
|
result['spu'] = 'not used' if pps2 == 0 else f'0x{pps2:02X}'
|
|
if pps0 & 0x40 and i < len(data): # PPS3 (reserved)
|
|
result['pps3'] = f'{data[i]:02X}'
|
|
i += 1
|
|
if i < len(data):
|
|
pck = data[i]
|
|
check = 0
|
|
for b in data[:i]:
|
|
check ^= b
|
|
result['pck'] = f'{pck:02X}'
|
|
result['pck_valid'] = check == pck
|
|
return result
|
|
|
|
|
|
def decode_sniff_msg(raw_data, msg_type, flags=0, prev=None):
|
|
"""Decode a raw sniff message of the given type.
|
|
|
|
Returns a structured dict with at least a 'type' key, or None if
|
|
the message type has no structured decode.
|
|
|
|
*prev* optionally carries the previous TPDU's decoded context for
|
|
resolving GET RESPONSE.
|
|
"""
|
|
if msg_type == 'tpdu' and raw_data:
|
|
return decode_message(raw_data, prev=prev)
|
|
if msg_type == 'change':
|
|
return decode_change(flags)
|
|
if msg_type == 'fidi' and raw_data:
|
|
return decode_fidi(raw_data)
|
|
if msg_type == 'atr':
|
|
return _decode_atr(raw_data)
|
|
if msg_type == 'pps':
|
|
return _decode_pps(raw_data)
|
|
return None
|
|
|
|
|
|
def _decode_field(spec, value):
|
|
"""Decode a single P1 or P2 field from its byte value."""
|
|
result = {'raw': f'{value:02x}'}
|
|
|
|
if isinstance(spec, dict):
|
|
if value in spec and isinstance(spec[value], str):
|
|
result['name'] = spec[value]
|
|
elif 'label' in spec and 'bits' in spec:
|
|
result['label'] = spec['label']
|
|
matches = []
|
|
for mask_val, desc in sorted(spec['bits'].items()):
|
|
if (value & 0x07) == mask_val:
|
|
matches.append(desc)
|
|
elif (value & mask_val) == mask_val and mask_val > 0x07:
|
|
matches.append(desc)
|
|
result['bits'] = matches if matches else None
|
|
elif 'fmt' in spec:
|
|
result['label'] = spec.get('label', '')
|
|
result['value'] = value
|
|
|
|
return result
|