A card usually holds several OTA key sets, and the SCP80 counter is tracked
per key version on the card, so a preset now carries one keyset per
GlobalPlatform key version - the b8..b5 nibble of KIc/KID (TS 102 225
5.1.2/A.2), the version is implicit in the bytes. The spec is explicit:
"a dedicated counter shall be associated to each key version" (Annex A.1) and
"the key version number indicated in the KIc and KID (bits b8..b5) fields
shall be identical when different from 0" - a mismatch is rejected by the card
with "Unidentified security error" (A.2).
Server (presets.py, schema 2):
- a preset carries `keysets: [{kic, kid, kicKey, kidKey, cntr}]`; validation
refuses a KIc/KID version mismatch (A.2), a version outside 01-0F ('00'
means "no security" and is a packet-level choice, not a keyset), duplicate
versions and missing keys/counters; a v3.8.0 flat preset converts into one
keyset on load and on import;
- `set_counter(..., kvn)` writes the counter of that keyset (monotonic per
keyset), the audit line carries the kvn, and `find_keyset()` serves the
lookups;
- the operations derive the key version from the request's KIc byte and
persist into that keyset: /api/send-ota, the RAM install/install-app/compat
steps (_ram_send_gp_apdu) and the test runner's SCP80 steps (which may name
a `kvn` per step and keep one working counter per keyset);
- a non-zero key version the named preset does not define, or a KIc/KID
mismatch, is refused before anything is built (_preset_keyset_check /
_keyset_guard: 400, or a step error in the test runner). Without a
preset_id only the mismatch rule applies.
PWA:
- the Cards form's KIc/KID/counter/keys inputs become a keyset editor (one row
per version: KIc, KID, both keys, that version's counter, Add/Remove; the
version is shown derived from the bytes and a mismatch is flagged);
- the SCP80 and RAM views get a Key-version selector beside the preset
selector, driving the KIc/KID bytes and loading that keyset's keys and
counter; the packet builder refuses a version the preset does not define
(spKeysetCheck/spKeysetGuard, pure and unit-tested);
- the counter syncs are per keyset (spCntrLocalSync/ramSaveCntr), the SCP80
form's counter edit posts the keysets, and the test-run write-back syncs
every counter the server reports (scp80_counters).
Docs/help/AGENTS updated; sw cache simple-v335. Tests: 610 Python (store
keysets, endpoint refusals, the counter landing in the right keyset) and 726
Node (keysets.test.js plus the updated harnesses).
The plain "Send to Card" path refreshed the whole preset right before
sending (spRefreshFromPreset -> cardsApply -> cardsApplyFields) and
re-applied the preset's slot TAR - so a TAR typed for a push/link trigger,
an applet OTA message or the HTTP OTA admin params was silently replaced by
the preset's ISD TAR (the pack buttons for those sources deliberately leave
the TAR manual; the help even said so).
- spRefreshFromPreset(selId, keepTar): the plain send passes keepTar, so
the form's TAR survives; the counter, keys and SPI are still re-read.
- selecting a card preset, ramApplyCard and the chain packs still set the
TAR; the RAM operations keep the preset's ISD TAR by design.
- spParams()/getRamSpParams() normalise the TAR (strip/upper/pad to 6);
only the preview padded before, a short TAR went to the server raw.
- help EN/RU clarified, cards_counter/ram tests updated, sw simple-v294.
652 frontend / 499 Python green; version 3.6.21.
Explore returned partial data (no ELF/module entries, the installed package
missing) and then failed with cntr_low. Two causes, both in the
actual-response SMS-SUBMIT path the card uses for big listings:
- `_find_sms_tpdu` read TLV lengths as a single byte; the FETCH carries
`8B 81 97 ...` (BER long form) for the big pages, so it returned a
corrupted, truncated TPDU.
- `_calc_ud_offset` treated the SMS-SUBMIT relative validity period (VPF=10)
as 7 bytes instead of 1, shifting the UD offset: `_parse_sms_concat` then
read a bogus UDH and reported no concatenation, so the segments never
assembled and the PoR/data was dropped ("RAM RESPONSE-PACKET: empty").
The step was marked failed, the counter did not advance, the same counter
was retried and the card answered `cntr_low`, which also blocked P1=10
(modules) where the installed package appears.
- the captured segments now always store the assembled UD (`submit_ud_hex`);
`_sms_submit_por()` rebuilds the DELIVER-style packet (`02 71 00` + UD) for
`_decode_por`. Verified against the live capture: por_ok, remote SW 6310,
438 hex chars of listing data (the exact bytes of the P1=20 page).
- `spPorAccepted` counts `actual_response_sms_submit` (0x0B) as accepted, so
the counter advances when the data follows via SMS-SUBMIT.
Explore queries follow GP Card Spec v2.3.1 11.4.2.2: compact listings
(P2.b2=0) with the chained GET RESPONSE (`ramGetStatusApdu`, paging P2=00 ->
P2=01), the malformed P2=02 attempt is gone, and the ISD-only query (P1=80)
never pages with next-occurrence (the card shall reject it).
Tests: Python SmsSubmitCaptureTest with the live FETCH bytes (TPDU length,
UD offset, concat reassembly, 027100+UD decode); ram.test.js checks the APDU
builder and the missing P2=02 attempt; cards_counter covers 0x0B.
608 frontend / 492 Python green; version 3.6.4; sw simple-v277.
The SCP80/RAM forms hold a copy of the preset (counter, keys, TAR, SPI).
Editing the preset on the Cards tab saved correctly, but the form kept the
old copy: the operation sent the stale counter (the card answers cntr_low)
and the post-send sync wrote the stale value back over the preset - the
saved counter silently reverted. Reproduced in a real DOM:
after select in SCP80: preset=0000000001 sp=0000000001
after Cards edit+save: preset=00000000AA sp=0000000001
after a sync: preset=0000000001 (edit lost)
- `cardsApply()` split into `cardsApplyFields()` (field copy, no packet) and
`cardsApply()` = fields + genSp; new `spRefreshFromPreset(selId)` re-reads
the selected preset from `sp-card-sel` / `ram-card-sel` and re-applies it.
- `pysimSendOta()` and `ramExecute()` call it before starting, so every
SCP80/RAM operation uses the preset as it is now.
- A rejected send no longer advances the counter: new `spPorAccepted(por)`
gates the advance+write-back in `pysimSendOta`, the Explore pagination and
its GET DATA step, and the server's RAM install (`_ram_next_cntr`: advance
only for `por_ok`/`no_por` steps). A failed install still returns
`final_cntr` (the accepted prefix) and the PWA persists it, so a retry
never replays a counter the card already consumed.
- tests: cards_counter.test.js (the stale-form regression, RAM selector,
fields-without-genSp, spPorAccepted) and `_ram_next_cntr` cases; the
cards_form/ram harnesses updated for the split.
- docs/api.md counter semantics; AGENTS preset-source-of-truth rule.
607 frontend / 488 Python green; version 3.6.3; sw simple-v276.
catarrh