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_cose.py

@@ -0,0 +1,74 @@
+"""Tests for the hand-rolled COSE_Sign1 sign/verify primitive."""
+
+import cbor2
+import pytest
+from cryptography.hazmat.primitives.asymmetric import ec
+
+from aliro_harness.issuer.cose import (
+    CoseVerificationError,
+    sign_cose_sign1,
+    verify_cose_sign1,
+)
+
+
+def test_sign_then_verify_returns_original_payload():
+    key = ec.generate_private_key(ec.SECP256R1())
+    payload = b"hello, aliro"
+
+    signed = sign_cose_sign1(
+        private_key=key,
+        payload=payload,
+        kid=b"\x01\x02\x03\x04\x05\x06\x07\x08",
+    )
+
+    recovered = verify_cose_sign1(signed, key.public_key())
+    assert recovered == payload
+
+
+def test_verify_fails_with_wrong_key():
+    signing_key = ec.generate_private_key(ec.SECP256R1())
+    wrong_key = ec.generate_private_key(ec.SECP256R1())
+    signed = sign_cose_sign1(
+        private_key=signing_key,
+        payload=b"aliro-a",
+        kid=b"\x00" * 8,
+    )
+
+    with pytest.raises(CoseVerificationError):
+        verify_cose_sign1(signed, wrong_key.public_key())
+
+
+def test_signed_structure_is_well_formed_cose_sign1():
+    """COSE_Sign1 wire format: 4-element CBOR array, alg in protected, ES256 = -7."""
+    key = ec.generate_private_key(ec.SECP256R1())
+    kid = b"\xaa\xbb\xcc\xdd\xee\xff\x11\x22"
+    signed = sign_cose_sign1(private_key=key, payload=b"x", kid=kid)
+
+    decoded = cbor2.loads(signed)
+    assert isinstance(decoded, list)
+    assert len(decoded) == 4
+
+    protected_bstr, unprotected, payload_bstr, signature = decoded
+    assert isinstance(protected_bstr, bytes)
+    assert isinstance(unprotected, dict)
+    assert isinstance(payload_bstr, bytes)
+    assert isinstance(signature, bytes)
+
+    protected = cbor2.loads(protected_bstr)
+    assert protected == {1: -7}
+
+    assert unprotected.get(4) == kid
+
+    assert payload_bstr == b"x"
+
+    assert len(signature) == 64
+
+
+def test_signature_uses_raw_r_s_not_der():
+    """COSE ECDSA signatures are raw r||s (64 bytes for P-256), not DER-encoded."""
+    key = ec.generate_private_key(ec.SECP256R1())
+    signed = sign_cose_sign1(private_key=key, payload=b"x", kid=b"\x00" * 8)
+    signature = cbor2.loads(signed)[3]
+
+    assert len(signature) == 64
+    assert signature[0] != 0x30