From ce4acec8d9d67f1c03ec8b55e1b2453503069cee Mon Sep 17 00:00:00 2001
From: Sigma-Ohio <crt@teleco.ch>
Date: Mon, 9 Jun 2025 03:35:52 +0200
Subject: went insane

---
 research/bad-bruteforcing/inspecto.py | 77 +++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 research/bad-bruteforcing/inspecto.py

(limited to 'research/bad-bruteforcing/inspecto.py')

diff --git a/research/bad-bruteforcing/inspecto.py b/research/bad-bruteforcing/inspecto.py
new file mode 100644
index 0000000..37dc3d6
--- /dev/null
+++ b/research/bad-bruteforcing/inspecto.py
@@ -0,0 +1,77 @@
+import os
+from binascii import unhexlify, hexlify
+import csv
+
+def load_samples(folder):
+    msgs, crcs, rawhex = [], [], []
+    for fn in os.listdir(folder):
+        path = os.path.join(folder, fn)
+        with open(path, 'r') as f:
+            for line in f:
+                if '=' not in line:
+                    continue
+                try:
+                    h, c = line.strip().split('=')
+                    data = list(unhexlify(h))
+                    chk = int(c, 16)
+                    msgs.append(data)
+                    crcs.append(chk)
+                    rawhex.append(h.upper())
+                except Exception:
+                    continue
+    return msgs, crcs, rawhex
+
+def bit_diff(a, b):
+    return ''.join(['↑' if (a ^ b) & (1 << i) else '.' for i in reversed(range(8))])
+
+def analyze(msgs, crcs, rawhex):
+    base_msg, base_crc = msgs[0], crcs[0]
+    base_hex = rawhex[0]
+    rows = []
+    for idx, (msg, crc, raw) in enumerate(zip(msgs[1:], crcs[1:], rawhex[1:]), start=1):
+        maxlen = max(len(base_msg), len(msg))
+        for i in range(maxlen):
+            b0 = base_msg[i] if i < len(base_msg) else None
+            b1 = msg[i] if i < len(msg) else None
+            if b0 != b1:
+                delta_crc = (crc - base_crc) & 0xFF
+                xor_crc = crc ^ base_crc
+                b0_str = f"{b0:02X}" if b0 is not None else "--"
+                b1_str = f"{b1:02X}" if b1 is not None else "--"
+                bitdiff = bit_diff(b0 or 0, b1 or 0)
+                print(f"Sample {idx} | Byte {i} | {b0_str} → {b1_str} | ΔCRC={crc:02X} | BitDiff={bitdiff}")
+                rows.append([
+                    idx,
+                    i,
+                    b0_str,
+                    b1_str,
+                    bitdiff,
+                    f"{base_crc:02X}",
+                    f"{crc:02X}",
+                    f"{delta_crc:02X}",
+                    f"{xor_crc:02X}",
+                    raw,
+                    f"{crc:02X}"
+                ])
+    return rows
+
+# 📂 Point this to your folder
+input_folder = "C:/Users/crt/Documents/bodeting/research/bad-bruteforcing/reveng-formatted"
+
+# 🧠 Do the work
+msgs, crcs, rawhex = load_samples(input_folder)
+rows = analyze(msgs, crcs, rawhex)
+
+# 📝 Save CSV
+out_path = os.path.join(os.getcwd(), "crc_analysis_output.csv")
+with open(out_path, 'w', newline='', encoding='utf-8') as f:
+    writer = csv.writer(f)
+    writer.writerow([
+        "Sample", "Byte Index", "Base Byte", "Other Byte", "Bit Diff",
+        "Base CRC", "Other CRC", "CRC_DIFF", "CRC_XOR",
+        "HEX Input", "Original CRC"
+    ])
+    writer.writerows(rows)
+
+print(f"\n✅ Analysis saved to: {out_path}")
+os.system(f'start notepad "{out_path}"')
-- 
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