Creating your own IPFs

[acd2001]

keirf disk-utilities 2023-05-13 git 403a4d9

Added Cardiaxx Decoder and Plotting Protection

[BarryB]

Originally Posted by acd2001

keirf disk-utilities 2023-05-13 git 403a4d9

Added Cardiaxx Decoder and Plotting Protection

Cheers fella

[BarryB]

Keir has now supported a couple of Copylocks that had an extra signature in sector 6: A.P.B. and Weird Dreams.

[acd2001]

keirf disk-utilities 2023-05-19 git 92beb58

copylock: Support ext-signature variant found in APB and Weird Dreams

[BarryB]

Originally Posted by acd2001

keirf disk-utilities 2023-05-19 git 92beb58

copylock: Support ext-signature variant found in APB and Weird Dreams

Awesome

[TheEdge]

I can no longer build Disk Utilities (92beb58) on macOS Mojave or Catalina. I get the following error.

gcc -O2 -fno-strict-aliasing -std=gnu99 -Wall -Werror -I../../libdisk/include -MMD -MF amiga/.copylock.opic.d -m64 -fPIC -fvisibility=hidden -c -o amiga/copylock.opic amiga/copylock.c
amiga/copylock.c:245:38: error: suggest braces around initialization of subobject
[-Werror,-Wmissing-braces]
struct copylock_ext_info ext = { 0 };
^
{}
1 error generated.
make[2]: *** [amiga/copylock.opic] Error 1
make[1]: *** [all] Error 2
make: *** [all] Error 2

[Keir]

Originally Posted by TheEdge

I can no longer build Disk Utilities (92beb58) on macOS Mojave or Catalina. I get the following error.

gcc -O2 -fno-strict-aliasing -std=gnu99 -Wall -Werror -I../../libdisk/include -MMD -MF amiga/.copylock.opic.d -m64 -fPIC -fvisibility=hidden -c -o amiga/copylock.opic amiga/copylock.c
amiga/copylock.c:245:38: error: suggest braces around initialization of subobject
[-Werror,-Wmissing-braces]
struct copylock_ext_info ext = { 0 };
^
{}
1 error generated.
make[2]: *** [amiga/copylock.opic] Error 1
make[1]: *** [all] Error 2
make: *** [all] Error 2

Thanks for the report. This should now be fixed.

[TheEdge]

Originally Posted by Keir

Thanks for the report. This should now be fixed.

Successful build with latest version (a9f920d).

Thanks for all your hard work.

[acd2001]

Keirf disk-utilities 2023-20-05 git f7cca25

Copylock: Rework LFSR handling a little, for clarity and also to fix
LFSR seed probing on Weird Dreams and APB sector 6.
Copylock: Clean up terminology around "sec6 discontiguity".
The new naming is more consistent regarding the LFSR *skipping*
the 16-byte signature, or continuing through it.
Added decoder for Universe, Universal Warrior, and Dragonflight. Renamed hi-tec to antcliffe.
Copylock: Fix MacOS build. No semantic change.

[BarryB]

Originally Posted by acd2001

Keirf disk-utilities 2023-20-05 git f7cca25

Copylock: Rework LFSR handling a little, for clarity and also to fix
LFSR seed probing on Weird Dreams and APB sector 6.
Copylock: Clean up terminology around "sec6 discontiguity".
The new naming is more consistent regarding the LFSR *skipping*
the 16-byte signature, or continuing through it.
Added decoder for Universe, Universal Warrior, and Dragonflight. Renamed hi-tec to antcliffe.
Copylock: Fix MacOS build. No semantic change.

Thanks as always

[Galahad/FLT]

Odd how Rob Northen updated the copylock track but to what end?

Pretty sure there was nothing special about the actual ingame checks for the serial key, unless it was an attempt to stop the generic key readers we developed that would generate all the possible serial keys, which means Rob Northen must have known about them.

[Keir]

Originally Posted by Galahad/FLT

Odd how Rob Northen updated the copylock track but to what end?

Pretty sure there was nothing special about the actual ingame checks for the serial key, unless it was an attempt to stop the generic key readers we developed that would generate all the possible serial keys, which means Rob Northen must have known about them.

I believe the LFSR-based pattern in the Copylock pseudorandom data is a recent insight, and wasn't known or used by contemporary crack tools? In which case, the variations in LFSR behaviour across the 16-byte static signature in sector 6, and also the anomalous further "random but not from the LFSR" 8 bytes in Weird Dreams and APB, are of interest only from the p.o.v. of efficiently representing and reconstructing a Copylock track. The in-game protection code and cracker tools would simply treat the sector data as the usual unstructured bag of random bytes, used only for calculating a random checksum/key.

The only Copylock track variation that really affects the protection-checking routine is the change in sync words, which seems to have occurred around summer 1989. Previously these were of the form 0x65xx where xx is MFM-encoded sector number. But two adjacent 1 bits is illegal MFM and easily misread, which is almost certainly why Rob changed to a pre-calculated list of well-formed sync words (0x8911, 0x8914, ...) and of course this does require a change to the protection-reading routines.

EDIT: I suppose my conclusion then is same as yours: Who knows why the method of generating the sector data was varied! Especially for Weird Dreams and APB: why "hardwire" the key rather than leave it to the LFSR? It's also interesting that the LFSR, and therefore all other sector data bytes, are identical on those two titles!

[rygar]

I just bought Greaseweazle v4. Could somone tell me how can i dump my disks? I need some manual like "Greaseweazle for dummies"
I have some oryginals and a lot of other disks.

[Snoopy1234]

Originally Posted by rygar

I just bought Greaseweazle v4. Could somone tell me how can i dump my disks? I need some manual like "Greaseweazle for dummies"
I have some oryginals and a lot of other disks.

Best idea would be to join the Facebook Greaseweazle group and browse the past posts. The possibilities and limitations are all explained there.

https://www.facebook.com/groups/greaseweazle/

[acd2001]

keirf disk-utilities 2023-06-01 git b265fca

Added new Lankhor format and moved f1 and outzone to Lankhor,
moved Pang to pierre_adane and added support for Toki and Snow Bros.
Renamed and reworked diamenty to podpierdzielacz.
Updated Nightdawn - removed the protection format
as it was covered by zeros longtrack

[BarryB]

Originally Posted by acd2001

keirf disk-utilities 2023-06-01 git b265fca

Added new Lankhor format and moved f1 and outzone to Lankhor,
moved Pang to pierre_adane and added support for Toki and Snow Bros.
Renamed and reworked diamenty to podpierdzielacz.
Updated Nightdawn - removed the protection format
as it was covered by zeros longtrack

Thank you

[acd2001]

keirf disk-utilities 2023-06-07 git 09c64af

Disk-analyse: Do not include dynamic link options when statically linking libdisk
Statically link libdisk to disk-analyse when SHARED_LIB is set

[BarryB]

Originally Posted by acd2001

keirf disk-utilities 2023-06-07 git 09c64af

Disk-analyse: Do not include dynamic link options when statically linking libdisk
Statically link libdisk to disk-analyse when SHARED_LIB is set