Initial snapshot: Aliro applet, harness, Nucleo NFC10A1 reader port

Three components, all bench-validated to varying depths:

- applet/: CSA Aliro v1.0 Java Card applet for J3R180. AUTH0 + AUTH1
  expedited-standard flow end-to-end green via PC/SC bench reader
  (aliro-bench-test). Userland AES-256-GCM and HMAC-SHA-256 layered
  on top of J3R180's primitives because the card lacks both natively.
  P-256 curve params seeded explicitly per J3R180's quirk.

- harness/: Python orchestrator (aliro-trustgen, aliro-personalize,
  aliro-bench-test) for trust-bundle generation, card personalization
  via PersonalizationApplet, and PC/SC AUTH0+AUTH1 transactions. 126
  pytest cases passing.

- reader/STM32CubeExpansion_ALIRO_V1_0_0/: ST X-CUBE-ALIRO V1.0.0
  with our NFC10A1 port (NUCLEO-U545RE-Q + X-NUCLEO-NFC10A1, ST25R200
  shared with NFC09A1). nfc10-only/ project, NFC10A1 BSP shim,
  ALIRO_TRUST_OVERRIDE include into vendor's provisioning.c, and an
  ALIRO_APDU_TRACE wrapper around demoTransceiveBlocking. Boots,
  detects the J3R180, completes SELECT + AUTH0; AUTH1 currently fails
  with RFAL ERR_PROTO (0xB) — under investigation, see
  docs/plans/2026-04-20-nucleo-nfc10a1-port.md and bench-notes/.

Excluded: x-cube-aliro.zip vendor archive, harness/.venv, build dirs,
generated aliro_trust.h (contains private reader scalar), all PEMs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

harness/tests/test_reader_auth0.py

@@ -0,0 +1,72 @@
+import pytest
+
+from aliro_harness.reader.auth0 import build_auth0_apdu, build_auth0_data
+
+
+def test_auth0_data_field_carries_six_mandatory_tlvs_in_spec_order():
+    reader_ephem_uncomp = bytes([0x04]) + b"\x11" * 32 + b"\x22" * 32
+    data = build_auth0_data(
+        reader_ephem_pub_uncompressed=reader_ephem_uncomp,
+        reader_group_id=b"\xaa" * 16,
+        reader_group_sub_id=b"\xbb" * 16,
+        transaction_id=b"\xcc" * 16,
+        command_parameters=0x00,
+        authentication_policy=0x00,
+    )
+    assert data[0:3] == bytes([0x41, 0x01, 0x00])     # command_parameters
+    assert data[3:6] == bytes([0x42, 0x01, 0x00])     # authentication_policy
+    assert data[6:10] == bytes([0x5C, 0x02, 0x01, 0x00])  # protocol_version
+    assert data[10:12] == bytes([0x87, 0x41])         # reader_ePubK header (65B)
+    assert data[12:77] == reader_ephem_uncomp
+    assert data[77:79] == bytes([0x4C, 0x10])         # transaction_id header
+    assert data[79:95] == b"\xcc" * 16
+    assert data[95:97] == bytes([0x4D, 0x20])         # reader_identifier (32B = group||sub)
+    assert data[97:113] == b"\xaa" * 16
+    assert data[113:129] == b"\xbb" * 16
+    assert len(data) == 129
+
+
+def test_build_auth0_apdu_wraps_data_in_short_form():
+    apdu = build_auth0_apdu(b"\x41\x01\x00")
+    assert apdu == bytes([0x80, 0x80, 0x00, 0x00, 0x03, 0x41, 0x01, 0x00])
+
+
+def test_reader_ephem_must_be_uncompressed():
+    with pytest.raises(ValueError, match="65B uncompressed"):
+        build_auth0_data(
+            reader_ephem_pub_uncompressed=b"\x02" + b"\x11" * 32,  # compressed
+            reader_group_id=b"\xaa" * 16,
+            reader_group_sub_id=b"\xbb" * 16,
+            transaction_id=b"\xcc" * 16,
+        )
+
+
+def test_wrong_group_id_length_rejected():
+    with pytest.raises(ValueError, match="must each be 16B"):
+        build_auth0_data(
+            reader_ephem_pub_uncompressed=bytes([0x04]) + b"\x11" * 32 + b"\x22" * 32,
+            reader_group_id=b"\xaa" * 15,
+            reader_group_sub_id=b"\xbb" * 16,
+            transaction_id=b"\xcc" * 16,
+        )
+
+
+def test_wrong_transaction_id_length_rejected():
+    with pytest.raises(ValueError, match="must be 16B"):
+        build_auth0_data(
+            reader_ephem_pub_uncompressed=bytes([0x04]) + b"\x11" * 32 + b"\x22" * 32,
+            reader_group_id=b"\xaa" * 16,
+            reader_group_sub_id=b"\xbb" * 16,
+            transaction_id=b"\xcc" * 17,
+        )
+
+
+def test_command_parameters_bit_zero_set_emits_0x01_byte():
+    data = build_auth0_data(
+        reader_ephem_pub_uncompressed=bytes([0x04]) + b"\x11" * 32 + b"\x22" * 32,
+        reader_group_id=b"\xaa" * 16,
+        reader_group_sub_id=b"\xbb" * 16,
+        transaction_id=b"\xcc" * 16,
+        command_parameters=0x01,
+    )
+    assert data[0:3] == bytes([0x41, 0x01, 0x01])