Files view: name the phonebook files from the card's EF_PBR (v2.7.7)

- EF_PBR (TS 31.102 §4.4.2.1) is the card's declaration of its phonebook:
  the constructed tags A8/A9/AA announce the type-1/2/3 groups and each nested
  primitive tag C0…CC names the file kind plus its FID — and, in a three-byte
  object, its SFI (length 2 = FID only).  pySim has no parser for it (its
  EF_PBR class still carries a "# TODO: a80ac0034f3a…" stub), so the decoder
  follows the spec: new simtrace_analyser/pbr.py
- the tracker decodes every EF_PBR record it observes (a READ RECORD's data
  or an UPDATE RECORD's body) and uses it for the DF it belongs to: the
  phonebook files get their symbolic names (4FA1 = EF_PBC, 4F3A = EF_ADN,
  4F01 = EF_IAP, 4F4A = EF_EXT1, 4F3D = EF_CCP1, 4F61 = EF_EMAIL, …), an
  earlier placeholder name is upgraded when the PBR arrives later, and the
  declared SFIs feed the DF's SFI→FID map (so SFI-addressed reads resolve
  without waiting for an FCP)
- verified on the live sessions 47/193:
  DF_TELECOM/DF_PHONEBOOK/EF_PBC (4FA1) and the SFI map
  {2→4F3A, 4→4FA1, 6→4F4A, 7→4F4F}
- also fixed: the "SFI = FID's five low bits" fallback (TS 102 221
  §11.1.1.4.8) no longer applies to a DF/ADF's FCP, which has no SFI
- tests: tests/test_pbr.py (the two real records, SFI-less objects, padding,
  truncation, merging, the shape check) and tracker cases (names, path,
  SFI map, the later-PBR upgrade); 537 Python + 76 Node tests
- README/README_RUS document the PBR naming; PWA_VERSION/pyproject/
  version.py 2.7.7, SW cache simtrace-analyser-v87

simtrace_analyser/pbr.py

@@ -0,0 +1,107 @@
+"""EF_PBR (Phone Book Reference file) record decoding — TS 31.102 §4.4.2.1.
+
+The phonebook's files (ADN, IAP, ANR, PBC, …) have issuer-assigned FIDs, so
+the static EF dictionary cannot name them.  The card declares them here:
+
+* the constructed tags 'A8', 'A9' and 'AA' announce a type-1/2/3 file group
+  (the first FID under 'A8' is the master EF, normally the ADN file);
+* each nested primitive tag ('C0' … 'CC') names the kind of file and carries
+  its FID and — when the object is three bytes long — its SFI
+  (length '02' = FID, length '03' = FID + SFI);
+* a record is padded with 'FF' after the last object.
+
+The decoder is deliberately tolerant: unknown primitives are reported raw and
+a truncated object ends the record (real cards pad and occasionally carry
+longer, path-shaped type-3 references).
+"""
+import collections
+
+# Table 4.2 — the primitive tags naming the phonebook files.
+PBR_NAMES = {
+    'C0': 'EF_ADN', 'C1': 'EF_IAP', 'C2': 'EF_EXT1', 'C3': 'EF_SNE',
+    'C4': 'EF_ANR', 'C5': 'EF_PBC', 'C6': 'EF_GRP', 'C7': 'EF_AAS',
+    'C8': 'EF_GAS', 'C9': 'EF_UID', 'CA': 'EF_EMAIL', 'CB': 'EF_CCP1',
+    'CC': 'EF_PURI',
+}
+# Table 4.1 — the constructed tags: the file-linking type.
+PBR_TYPES = {'A8': 1, 'A9': 2, 'AA': 3}
+
+
+def _objects(data):
+    """Iterate (tag, value) pairs; stop at the 'FF' padding or a truncation."""
+    i = 0
+    while i + 1 < len(data):
+        tag = data[i]
+        if tag == 0xFF:
+            return
+        length = data[i + 1]
+        j = i + 2
+        if length & 0x80:                       # BER long form (defensive)
+            octets = length & 0x7F
+            if j + octets > len(data):
+                return
+            length = int.from_bytes(data[j:j + octets], 'big')
+            j += octets
+        value = data[j:j + length]
+        if len(value) < length:
+            return
+        yield tag, value
+        i = j + length
+
+
+def _files(value):
+    out = []
+    for tag, v in _objects(value):
+        name = PBR_NAMES.get(f'{tag:02X}')
+        if name is None:
+            continue
+        if len(v) == 2:                         # FID only
+            item = {'tag': f'{tag:02X}', 'name': name, 'fid': v.hex()}
+        elif len(v) == 3:                       # FID + SFI
+            item = {'tag': f'{tag:02X}', 'name': name, 'fid': v[:2].hex(),
+                    'sfi': v[2]}
+        else:                                   # a path-shaped reference
+            item = {'tag': f'{tag:02X}', 'name': name, 'path': v.hex()}
+        out.append(item)
+    return out
+
+
+def parse_pbr_record(raw):
+    """Decode one EF_PBR record into its type groups (and the master EF)."""
+    if not raw:
+        return {'groups': [], 'master': None}
+    groups = []
+    master = None
+    for tag, value in _objects(raw):
+        kind = PBR_TYPES.get(f'{tag:02X}')
+        if kind is None:
+            continue
+        files = _files(value)
+        groups.append({'type': kind, 'tag': f'{tag:02X}', 'files': files})
+        if master is None and kind == 1 and files and 'fid' in files[0]:
+            master = files[0]['fid']
+    return {'groups': groups, 'master': master}
+
+
+def parse_pbr(records):
+    """Merge several EF_PBR records (the structure repeats per record)."""
+    out = collections.OrderedDict()
+    master = None
+    for raw in records or []:
+        parsed = parse_pbr_record(raw)
+        if master is None:
+            master = parsed['master']
+        for group in parsed['groups']:
+            for item in group['files']:
+                if 'fid' not in item:
+                    continue
+                prev = out.setdefault(item['fid'], dict(item))
+                prev.setdefault('types', [])
+                if group['type'] not in prev['types']:
+                    prev['types'].append(group['type'])
+    return {'files': out, 'master': master}
+
+
+def looks_like_pbr(raw):
+    """Cheap shape check: the record starts with a constructed A8/A9/AA tag."""
+    return bool(raw) and f'{raw[0]:02X}' in PBR_TYPES and len(raw) >= 4