[S] Change in pysim[master]: commands: get rid of cla4lchan

dexter has uploaded this change for review. ( https://gerrit.osmocom.org/c/pysim/+/37936?usp=email ) Change subject: commands: get rid of cla4lchan ...................................................................... commands: get rid of cla4lchan The send_apdu* methods now support lchan patching, so there is no longer a need for computing the class byte manually (which is prone get forgotten) before calling a send_apdu*. It is now enough to supply an APDU that has a class byte with the default channel selected. This also means we do not need cla4lchan anymore, so let's restruture the code and get rid of it completely. Related: OS#6531 Change-Id: Ia795f3c16a8875484fce3b44e61497d5aa52b447 --- M pySim/commands.py M pySim/euicc.py 2 files changed, 11 insertions(+), 24 deletions(-) git pull ssh://gerrit.osmocom.org:29418/pysim refs/changes/36/37936/1 diff --git a/pySim/commands.py b/pySim/commands.py index 3a7fe47..9e231f1 100644 --- a/pySim/commands.py +++ b/pySim/commands.py @@ -81,8 +81,8 @@ @property def cla_byte(self) -> Hexstr: - """Return the (cached) patched default CLA byte for this card.""" - return self._cla4lchan + """Return the lchan patched default CLA value for this card.""" + return cla_with_lchan(self._cla_byte, self.lchan_nr) @property def max_cmd_len(self) -> int: @@ -96,19 +96,6 @@ def cla_byte(self, new_val: Hexstr): """Set the (raw, without lchan) default CLA value for this card.""" self._cla_byte = new_val - # compute cached result - self._cla4lchan = cla_with_lchan(self._cla_byte, self.lchan_nr) - - def cla4lchan(self, cla: Hexstr) -> Hexstr: - """Compute the lchan-patched value of the given CLA value. If no CLA - value is provided as argument, the lchan-patched version of the SimCardCommands._cla_byte - value is used. Most commands will use the latter, while some wish to override it and - can pass it as argument here.""" - if not cla: - # return cached result to avoid re-computing this over and over again - return self._cla4lchan - else: - return cla_with_lchan(cla, self.lchan_nr) def send_apdu(self, pdu: Hexstr, apply_lchan:bool = True) -> ResTuple: """Sends an APDU and auto fetch response data @@ -122,7 +109,7 @@ sw : string (in hex) of status word (ex. "9000") """ if apply_lchan: - pdu = self.cla4lchan(pdu[0:2]) + pdu[2:] + pdu = cla_with_lchan(pdu[0:2], self.lchan_nr) + pdu[2:] if self.scp: return self.scp.send_apdu_wrapper(self._tp.send_apdu, pdu) else: @@ -142,7 +129,7 @@ sw : string (in hex) of status word (ex. "9000") """ if apply_lchan: - pdu = self.cla4lchan(pdu[0:2]) + pdu[2:] + pdu = cla_with_lchan(pdu[0:2], self.lchan_nr) + pdu[2:] if self.scp: return self.scp.send_apdu_wrapper(self._tp.send_apdu_checksw, pdu, sw) else: @@ -517,9 +504,9 @@ # TS 102 221 Section 11.3.1 low-level helper def _retrieve_data(self, tag: int, first: bool = True) -> ResTuple: if first: - pdu = self.cla4lchan('80') + 'cb008001%02x' % (tag) + pdu = '80cb008001%02x' % (tag) else: - pdu = self.cla4lchan('80') + 'cb000000' + pdu = '80cb000000' return self.send_apdu_checksw(pdu) def retrieve_data(self, ef: Path, tag: int) -> ResTuple: @@ -549,7 +536,7 @@ p1 = 0x00 if isinstance(data, (bytes, bytearray)): data = b2h(data) - pdu = self.cla4lchan('80') + 'db00%02x%02x%s' % (p1, len(data)//2, data) + pdu = '80db00%02x%02x%s' % (p1, len(data)//2, data) return self.send_apdu_checksw(pdu) def set_data(self, ef, tag: int, value: str, verify: bool = False, conserve: bool = False) -> ResTuple: @@ -592,7 +579,7 @@ if len(rand) != 32: raise ValueError('Invalid rand') self.select_path(['3f00', '7f20']) - return self.send_apdu_checksw(self.cla4lchan('a0') + '88000010' + rand, sw='9000') + return self.send_apdu_checksw('a088000010' + rand, sw='9000') def authenticate(self, rand: Hexstr, autn: Hexstr, context: str = '3g') -> ResTuple: """Execute AUTHENTICATE (USIM/ISIM). @@ -625,7 +612,7 @@ def status(self) -> ResTuple: """Execute a STATUS command as per TS 102 221 Section 11.1.2.""" - return self.send_apdu_checksw(self.cla4lchan('80') + 'F2000000') + return self.send_apdu_checksw('80F2000000') def deactivate_file(self) -> ResTuple: """Execute DECATIVATE FILE command as per TS 102 221 Section 11.1.14.""" @@ -645,7 +632,7 @@ def resize_file(self, payload: Hexstr) -> ResTuple: """Execute RESIZE FILE command as per TS 102 222 Section 6.10""" - return self.send_apdu_checksw(self.cla4lchan('80') + 'd40000%02x%s' % (len(payload)//2, payload)) + return self.send_apdu_checksw('80d40000%02x%s' % (len(payload)//2, payload)) def delete_file(self, fid: Hexstr) -> ResTuple: """Execute DELETE FILE command as per TS 102 222 Section 6.4""" diff --git a/pySim/euicc.py b/pySim/euicc.py index d0cb682..8bd1ae4 100644 --- a/pySim/euicc.py +++ b/pySim/euicc.py @@ -322,7 +322,7 @@ def store_data(scc: SimCardCommands, tx_do: Hexstr, exp_sw: SwMatchstr ="9000") -> Tuple[Hexstr, SwHexstr]: """Perform STORE DATA according to Table 47+48 in Section 5.7.2 of SGP.22. Only single-block store supported for now.""" - capdu = '%sE29100%02x%s' % (scc.cla4lchan('80'), len(tx_do)//2, tx_do) + capdu = '80E29100%02x%s' % (len(tx_do)//2, tx_do) return scc.send_apdu_checksw(capdu, exp_sw) @staticmethod -- To view, visit https://gerrit.osmocom.org/c/pysim/+/37936?usp=email To unsubscribe, or for help writing mail filters, visit https://gerrit.osmocom.org/settings?usp=email Gerrit-MessageType: newchange Gerrit-Project: pysim Gerrit-Branch: master Gerrit-Change-Id: Ia795f3c16a8875484fce3b44e61497d5aa52b447 Gerrit-Change-Number: 37936 Gerrit-PatchSet: 1 Gerrit-Owner: dexter <pmaier(a)sysmocom.de>