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by Proxima
Mon Oct 31, 2016 3:14 pm
Forum: Programming and Security
Topic: HMAC Key
Replies: 2
Views: 2785

Re: HMAC Key

That key is only used in calculating the download http url for a game or app title update. It does not relate to any other feature or HMAC in the Vita.
by Proxima
Wed Nov 25, 2015 3:03 pm
Forum: Programming and Security
Topic: how to edit index.dat
Replies: 3
Views: 1361

Re: how to edit index.dat

Not entirely correct. The index.dat file is encrypted and hashed, not signed. You could reencrypt and hash it after you change it. The bigger problem is writing it to the vs0: partition.
by Proxima
Fri Oct 09, 2015 11:31 pm
Forum: Programming and Security
Topic: Decrypt/Decompress Eboot.bin?
Replies: 7
Views: 2822

Re: Decrypt/Decompress Eboot.bin?

Actually Welcome Park is PFS protected. It's actually not a system app exactly. It is a separate file system mounted at pd0: and uses the same PFS style encryption at rest that package installs on ux0: do.
by Proxima
Wed Sep 09, 2015 3:38 pm
Forum: Programming and Security
Topic: Calculating title update download links with HMAC key
Replies: 30
Views: 31648

Re: Calculating title update download links with HMAC key

Thanks for this app Proxima! :) Anyway, the app made by cfwprophet need to lower the "unique" characters ;) The one made from tomtomdu80 is working well, but if you want a better GUI, the cfwprophet version is very good: LINK . Proxima, this tool can be used to find only update files or also the no...
by Proxima
Sun Sep 06, 2015 3:10 am
Forum: Programming and Security
Topic: Calculating title update download links with HMAC key
Replies: 30
Views: 31648

Re: Calculating title update download links with HMAC key

http://web.mit.edu/freebsd/head/contrib ... o/sha256.c

This is what I used for my implementation. Not sure why it would vary between implementations. Maybe differences in how the arguments processed.
by Proxima
Sat Sep 05, 2015 1:55 pm
Forum: Programming and Security
Topic: What kind of vulnerabilities would the keys give us ?
Replies: 6
Views: 1760

Re: What kind of vulnerabilities would the keys give us ?

If somehow accidently Sony leaked the keys or released them in the future , what would they give the hackers ? how would they actually help the Vita's hacking scene ? i know they would make great progress , but what kind of progress ? Thanks Rad Well, with a full set of keys (hmac, symmetric, asymm...
by Proxima
Thu Sep 03, 2015 1:28 am
Forum: Programming and Security
Topic: Calculating title update download links with HMAC key
Replies: 30
Views: 31648

Re: Calculating title update download links with HMAC key

Just so you are aware, when the Vita downloads a PKG file, it is over HTTP, not HTTPS.
by Proxima
Mon Aug 31, 2015 1:39 am
Forum: Programming and Security
Topic: Calculating title update download links with HMAC key
Replies: 30
Views: 31648

Calculating title update download links with HMAC key

Here's a sample program to calculate the title update download links. These links are similar to PS3, but have been updated on the Vita to include an HMAC-SHA256 of the title as part of the path. The HMAC key is: E5E278AA1EE34082A088279C83F9BBC806821C52F2AB5D2B4ABD995450355114 Below is a little C fu...
by Proxima
Thu Jun 11, 2015 1:42 pm
Forum: Programming and Security
Topic: PS Vita index.dat decryption keys posted
Replies: 26
Views: 11055

Re: PS Vita decryption keys posted

Yes, the labeling is a little unclear. The 1.80+ key will work on index.dat files on all firmware versions above 1.80. The other key will work on 1.691 and earlier.

Also, the first 0x20 bytes are the SHA256 hash of the plain text.


This is ONLY for index.dat files. Nothing else.
by Proxima
Sat Dec 27, 2014 1:34 pm
Forum: Programming and Security
Topic: Finally... some Christmas cheer!
Replies: 188
Views: 42567

Re: Finally... some Christmas cheer!

This was in PSVita because it is relevant for those trying to get homebrew bubbles running on PSVita. Should be with the rest of the PSP on vita talk...

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