wud this not b possible?

[pipster9999]

wud it not be possible for sum1 2 write an update that wud be basically identical to 1.5 (in features like homebrew, iso loaders) but with the feature of 2.00+ (web browser, codecs) and without the added security updates from sony, so if sum1 upgraded there 2.01+ it wud have these features

just a thought but correct me if its totally absurd.

[FrozenIpaq]

Well..you could try but it will not work at the momment. Update files can only be signed by Sony themselves, we can not sign them and thus we can not execute them successfully on our PSP's. Sadly..this is something we all wish for, but it is just very unlikely..almost impossible

[capnfuffy]

this was the thought behind the firmware launcher/custom firmware - but i dont know much about either because i havent done my homework on it

[pipster9999]

i havent done any research into it but i was just readin thru the forums n it just popped into my head, i personally know nothing about coding but cud it be possible to isolate the signiture and copy it and then in effect paste it to a custom upgrader?

[foXtrot]

Originally Posted by pipster9999

i havent done any research into it but i was just readin thru the forums n it just popped into my head, i personally know nothing about coding but cud it be possible to isolate the signiture and copy it and then in effect paste it to a custom upgrader?

It is a lot more complex then that and it has been discussed here before in detail. Sony has a private key to encrypt files, we have the public key to decrypt it. The second we change something in a file its signature is changed, then when we put it in the PSP, it compares the signature to the public key and there is a mismatch in the expected result of comparing the two keys, and it wont work.

[torchzack]

To the original topic question:

theoretically it is possible. it would take alot of work though,1st you'd need a great coder (Fanjita and probably Humma Kavula and people to help) to create an update, and then it would need to be signed by sony, or to be hacked to recreate a sony signing or to be hacked so it won't need to be signed.

[pipster9999]

ryt well say sum1 did write a custom firmware that i proposed wudnt it be possile to get sony to check it and approve it thats jus assumin they wud, but somehow hide or exclude or sumthin, part of the code that they wud not approve of?

[n.ioannucci]

yeah its not really a copy and paste deal.. its harder than that... if it was that easy then we would have done it already, but this update mix buisness i would imagine, will brick a few psp's in testinf IF it were to ever be possible(there is no way we will ever get sony's private key... like ever)

[MrMagoo]

Originally Posted by pipster9999

ryt well say sum1 did write a custom firmware that i proposed wudnt it be possile to get sony to check it and approve it thats jus assumin they wud, but somehow hide or exclude or sumthin, part of the code that they wud not approve of?

Your horrid spelling and grammer makes Baby Jesus cry.

More on topic, there's no way that Sony would 'sign' any firmware code presented to them by outsiders.

[bepe86]

Ouch, my eyes hurt, you know, this is a forum, you don't pay for each byte here

As for the idea, it would only work with firmware launchers. Flashing the new "firmware" would require encryption of the modules, and for that we need the private key, and if we had that, we would have homebrew avilable trough the game menu on all firmwares.

And no, you can't crack the private key, even with the most powerful computer avilable, it would probably take millions of years, and in the end, it would probably just say "42" :P

[makarman]

Your idea, or something similar, is proposed on average three times a day here.

We do have a custom firmware released... as of now it can only be run with the MPH Firmware Launcher. It's called 1.5 Media Edition, and it's basically 1.5 with support for AVC video and AAC music.

Originally Posted by bepe86

and in the end, it would probably just say "42" :P

That must have been the stupidest book I ever laid eyes upon.

[bepe86]

Originally Posted by makarman

...snip...

That must have been the stupidest book I ever laid eyes upon.

You gotta be kidding me, it's brilliant I have every book he's written, and I love them all. The best books ever (except of the bible)...

[badg0r]

Aaahh man!!! what did i told you last night on psp3d THIS IS PATCHED!!! You need the encryption key to wright your own firmware or acces user mode to acces the flash. So dont try to ask it on other sites.

[bepe86]

Patched? If you want to help someone, at least use correct terms... I believe you mean "encrypted", which is something totally different...

And the rest didn't make much sense either... user mode for flash? You need kernel mode, or an exploited user mode with access to flash0, and that excludes the web-browser and games...

[badg0r]

i know man but i just wanted to let him see what he was doing wrong maybe he doesnt know what encrypted is becouse he didnt ever heard of an encryption key what i told him last night

[bepe86]

[rant]I have one question, don't you guys have any time to actually write normal here in these forums? I have to read each sentance (and you had only one!) at least twice, and even then, I don't always understand.[/rant]

Anyways, here's some homework for both of you: en.wikipedia.org/wiki/encryption.

Edit: this one is interesting as well...

http://en.wikipedia.org/wiki/Public-key_cryptography