From a9886b9d52c3bce0a4b58805b5597efccc55225a Mon Sep 17 00:00:00 2001
From: itsme <itsme@xs4all.nl>
Date: Tue, 6 Jul 2021 19:26:42 +0200
Subject: initial commit

---
 crodump.py | 160 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 160 insertions(+)
 create mode 100644 crodump.py

(limited to 'crodump.py')

diff --git a/crodump.py b/crodump.py
new file mode 100644
index 0000000..a2a94a1
--- /dev/null
+++ b/crodump.py
@@ -0,0 +1,160 @@
+import os.path
+import struct
+from binascii import b2a_hex
+from hexdump import hexdump, asasc, tohex
+from koddecoder import kodecode
+"""
+python3 crodump.py crodump chechnya_proverki_ul_2012
+python3 crodump.py kodump -s 6   -o 0x4cc9 -e 0x5d95 chechnya_proverki_ul_2012/CroStru.dat
+"""
+
+class Datafile:
+    def __init__(self, dat, tad):
+        self.dat = dat
+        self.tad = tad
+
+        self.readtad()
+
+    def readtad(self):
+        self.tad.seek(0)
+        hdrdata = self.tad.read(2*4)
+        self.tadhdr = struct.unpack("<2L", hdrdata)
+        indexdata = self.tad.read()
+        self.tadidx = [ struct.unpack_from("<3L", indexdata, 12*_) for _ in range(len(indexdata)//12) ]
+
+    def readdata(self, ofs, size):
+        self.dat.seek(ofs)
+        return self.dat.read(size)
+
+    def dump(self, args, dokodecode=False, plainbytes=0):
+        print("tadhdr: %08x %08x" % tuple(self.tadhdr))
+        for i, (ofs, ln, chk) in enumerate(self.tadidx):
+            if ln==0xFFFFFFFF:
+                print("%5d: %08x %08x %08x" % (i, ofs, ln, chk))
+                continue
+            flags = ln>>24
+            ln &= 0xFFFFFFF
+            dat = self.readdata(ofs, ln)
+            plain = b''
+            if dokodecode and not args.nokod:
+                plain = dat[:plainbytes]
+                dat = kodecode(i+1, dat[plainbytes:])
+            if args.ascdump:
+                print("%5d: %08x-%08x: (%02x:%08x) %s %s" % (i, ofs, ofs+ln, flags, chk, tohex(plain), asasc(dat)))
+            else:
+                print("%5d: %08x-%08x: (%02x:%08x) %s %s" % (i, ofs, ofs+ln, flags, chk, tohex(plain), tohex(dat)))
+
+class Database:
+    def __init__(self, dbdir):
+        self.dbdir = dbdir
+
+        self.stru = self.getfile("Stru")
+        self.index = self.getfile("Index")
+        self.bank  = self.getfile("Bank")
+        self.sys = self.getfile("Sys")
+
+    def getfile(self, name):
+        try:
+            return Datafile(open(self.getname(name, "dat"), "rb"), open(self.getname(name, "tad"), "rb"))
+        except IOError:
+            return
+
+    def getname(self, name, ext):
+        return os.path.join(self.dbdir, "Cro%s.%s" % (name, ext))
+
+
+def decode_kod(args, data):
+    """
+    various methods of hexdumping KOD decoded data.
+    """
+    if args.nokod:
+        # plain hexdump, no KOD decode
+        hexdump(args.offset, data)
+    elif args.shift:
+        # explicitly specified shift.
+        args.shift = int(args.shift, 0)
+        enc = kodecode(args.shift, data)
+        hexdump(args.offset, enc)
+    else:
+        # output with all possible 'shift' values.
+        for s in range(256):
+            enc = kodecode(s, data)
+            if args.ascdump:
+                print("%02x: %s" % (s, asasc(enc)))
+            else:
+                print("%02x: %s" % (s, tohex(enc)))
+
+
+
+def kod_hexdump(args):
+    """
+    KOD decode a section of a data file
+    """
+    args.offset = int(args.offset, 0)
+    if args.length:
+        args.length = int(args.length, 0)
+    elif args.endofs:
+        args.endofs = int(args.endofs, 0)
+        args.length = args.endofs - args.offset
+
+    if args.filename:
+        with open(args.filename, "rb") as fh:
+            fh.seek(args.offset)
+            data = fh.read(args.length)
+            decode_kod(args, data)
+    else:
+        # no filename -> read from stdin.
+        import sys
+        data = sys.stdin.buffer.read()
+        decode_kod(args, data)
+
+
+def cro_dump(args):
+    db = Database(args.dbdir)
+
+    if db.stru:
+        print("stru")
+        db.stru.dump(args, dokodecode=True)
+    if db.index:
+        print("index")
+        db.index.dump(args)
+    if db.bank:
+        print("bank")
+        db.bank.dump(args)
+    if db.sys:
+        print("sys")
+        db.sys.dump(args, dokodecode=True, plainbytes=8)
+
+
+def main():
+    import argparse
+    parser = argparse.ArgumentParser(description='CRO hexdumper')
+    subparsers = parser.add_subparsers()
+    parser.set_defaults(handler=None)
+
+    ko = subparsers.add_parser('kodump', help='KOD dumper')
+    ko.add_argument('--offset', '-o', type=str, default="0")
+    ko.add_argument('--length', '-l', type=str)
+    ko.add_argument('--endofs', '-e', type=str)
+    ko.add_argument('--shift', '-s', type=str)
+    ko.add_argument('--ascdump', '-a', action='store_true')
+    ko.add_argument('--nokod', '-n', action='store_true')
+    ko.add_argument('filename', type=str, nargs='?')
+    ko.set_defaults(handler=kod_hexdump)
+
+    cro = subparsers.add_parser('crodump', help='CROdumper')
+    cro.add_argument('--kodecode', '-k', action='store_true')
+    cro.add_argument('--ascdump', '-a', action='store_true')
+    cro.add_argument('--nokod', '-n', action='store_true')
+    cro.add_argument('dbdir', type=str)
+    cro.set_defaults(handler=cro_dump)
+
+    args = parser.parse_args()
+
+    if args.handler:
+        args.handler(args)
+
+
+if __name__=='__main__':
+    main()
+
-- 
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