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by sandimy at 7:02 PM EST on November 3, 2019
Can someone help me find the hca key to this game? I tried several methods but failed...

The game's android ID is: jp.ne.donuts.pds
I have uploaded two sample acb files(there're no awb files) and the apk file here.

Thanks in advance.


edited 7:17 PM EST November 3, 2019
by bnnm at 5:22 PM EST on November 6, 2019
Key is 0x0000001C5E0D3154, added to latest vgmstream.
nogifes key by nogi at 3:01 AM EST on November 21, 2019
Hi everyone,
I need some help to find key from this game.
Try a lot but still too hard for me to find key.

The game's android id is "jp.co.aiia.nogifes".
Here are .acb(.adx inside) .usme files just extract from the apk.
And a cpk file is game data download from server.

https://mega.nz/#F!oRoVzIzD!iFmwEphJpVYWyocxB4S0Mw

Any help would be greatly appreciated.
Thank you.

edited 3:18 AM EST November 21, 2019

edited 3:19 AM EST November 21, 2019
0x20 audio decryption by Genoard at 2:20 PM EST on November 26, 2019
Tried to extract audio with CRID(.usm)Demux Tool posted above using 0x20 key method, but inputting in format described in Readme-mod.txt results in "Error: missing options". Tried adding -x to the string but the output still appears encrypted. Am i doing something wrong?
by bnnm at 4:37 PM EST on November 26, 2019
@nogi - I added the ADX/HCA key to the latest vgmstream. Video has no sound tho.

@Genoard - you do need to add -x (I forgot to put in the readme), if output is still bad maybe the key is misaligned? Try posting the video.
by Genoard at 1:05 PM EST on November 27, 2019
@bnnm - here's an archive with video and key.bin i used: https://files.catbox.moe/jsty7p.zip
Although i only tried to use this as a test run, i'm actually trying to get audio out of PS4 game's .usm. Don't know if it uses different encryption, but so far none of it's files i've checked contained similar repeating patterns.
by bnnm at 2:24 PM EST on November 27, 2019
@Genoard - the key start is slightly off

should be
7955B752 05559E43 6D554852 79558343
6F550252 37556D43 86552A52 9E557E43

instead of
6F550252 37556D43 86552A52 9E557E43
7955B752 05559E43 6D554852 79558343

While devs scould use one key per file no games have done that so far, should work for all others.
by Genoard at 3:32 PM EST on November 27, 2019
@bnnm
Thank you for correction. Also you probably misunderstood me there. The file i sent is not from the PS4 game in question- i tried to extract it only because i managed to find a 0x20 pattern in this one just to make sure i'm doing the process right. As for the ones i'm interested in- as i mentioned above, did not have any success in finding the key in them. An odd thing i've noticed in a few files- after 0x20 @SFA header the zeroes go for much longer than 0x140 (currently looking at as long as 0x9D0 for example). But, if my understanding is correct, if the audio was encrypted, then after 0x140 the zeroes should have changed to key?

Edit: the file i want to extract audio from: https://www.solidfiles.com/v/pWZVjjvmNdenD

edited 3:36 PM EST November 27, 2019
by bnnm at 4:35 PM EST on November 27, 2019
Indeed the key is after 0x140. This means, counter-intuitively, the key is just 0x20 0s (it's internally derived to create a final key)

00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000

This kind of .usm is common but can be correctly demuxed using VGMtoolbox's "video demultiplexer" option (https://sourceforge.net/projects/vgmtoolbox/), so I didn't think of explaining or simplifying this case.
by nogi at 9:19 PM EST on November 27, 2019
@bnnm Thank you so much!
Success to decode all files.

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