Course update: lessons, CTF 0x0011a_cb, and documentation

- 0x0011a_cb (Operation Dark Vector): nation-state CTF redesign with an
  AES-128-ECB sealed target and a plaintext launch origin; RP2350 firmware with
  bearing-driven servo, tri-color LEDs, GSV stats, and a realistic no-fix path
- docs: story-driven classified brief, GDB and Ghidra tutorials with deep
  step-throughs, regenerated artifacts and PDFs
- scripts: docstring standard, AES per-student randomizer, telemetry monitor
- week 3 to week 5 lessons: Ghidra patching tutorial, CMSIS-SVD hardware RE,
  double floating-point and GPIO architecture chapters, README structure

0x0001b_ctf/scripts/verify_ctf.py

@@ -0,0 +1,82 @@
+#!/usr/bin/env python3
+"""Verify every technical claim of Operation Black Start against CTF-01.bin.
+
+Exits 0 only when every address, byte, and hash in CTF-R.md and CTF-S.md
+matches the shipped image.
+"""
+import hashlib
+import struct
+import sys
+from pathlib import Path
+
+BASE = 0x10000000
+ROOT = Path(__file__).resolve().parent.parent
+BIN = ROOT / "CTF-01.bin"
+UF2 = ROOT / "CTF-01.uf2"
+
+EXPECTED_BIN_SHA = "6fd296f7a85f243fb26bf6bffcbeab26815fd8915101a81f72069063a5635e5a"
+EXPECTED_UF2_SHA = "980f04369c23ad32a063dfe18de5af08df3830138fc7e7898b1f011b4f5e1d9d"
+
+CMP_A = 0x100001FC
+CMP_B = 0x1000020A
+STRING_SIGNAL = 0x10003678
+STRING_FRAME = 0x100037A0
+LOOP_BACK = 0x10000266
+
+RESULTS = []
+
+
+def check(label, ok, detail=""):
+    """Record one verification result.
+
+    Parameters
+    ----------
+    label : str
+        Human-readable check name.
+    ok : bool
+        Whether the check passed.
+    detail : str
+        Extra context printed with the result.
+
+    Returns
+    -------
+    None
+    """
+    RESULTS.append(ok)
+    print(f"[{'PASS' if ok else 'FAIL'}] {label} {detail}")
+
+
+def main():
+    """Run all verification checks.
+
+    Returns
+    -------
+    int
+        Zero when every check passes, else one.
+    """
+    data = BIN.read_bytes()
+    check("CTF-01.bin SHA-256", hashlib.sha256(data).hexdigest() == EXPECTED_BIN_SHA)
+    check("CTF-01.uf2 SHA-256",
+          hashlib.sha256(UF2.read_bytes()).hexdigest() == EXPECTED_UF2_SHA)
+    check("vector table", data[0:32].hex() ==
+          "002008205b0100101b0100101d01001011010010110100101101001011010010")
+    check("initial SP", struct.unpack("<I", data[0:4])[0] == 0x20082000)
+    check("reset vector", struct.unpack("<I", data[4:8])[0] == 0x1000015B)
+    check("compare site A", data[CMP_A - BASE:CMP_A - BASE + 2]
+          == bytes.fromhex("5E2B"), "(cmp r3,#94)")
+    check("compare site B", data[CMP_B - BASE:CMP_B - BASE + 2]
+          == bytes.fromhex("5E2B"), "(cmp r3,#94)")
+    check("loop back-edge", data[LOOP_BACK - BASE:LOOP_BACK - BASE + 2]
+          == bytes.fromhex("E5E7"), "(b.n 0x10000234)")
+    check("SIGNAL banner", data[STRING_SIGNAL - BASE:STRING_SIGNAL - BASE + 15]
+          == b"SIGNAL: NORMAL\r")
+    check("dispatch frame", data[STRING_FRAME - BASE:STRING_FRAME - BASE + 36]
+          == b"WORLDGRID:BLACKSTART:GRID-7:WATER-3\x00")
+    check("grid_deviation init", data[0x3D94:0x3D98] == struct.pack("<I", 87))
+    total = sum(RESULTS)
+    print(f"\n{total}/{len(RESULTS)} checks passed")
+    return 0 if total == len(RESULTS) else 1
+
+
+if __name__ == "__main__":
+    sys.exit(main())