Homebrew [Concept] Injecting code into DSiWare .bin/.nds

[ParzivalWolfram]

Since Flipnote and the DSi Browser are encrypted using the DSi's common key AND since there's a way to turn these into .nds-format ROMs, would there be a way to write, say, a simple SD loader, inject it into a decrypted DSiWare image, re-encrypt and re-sign the new image, then copy it onto NAND?
If you encrypted/signed it properly, you could just copy it to NAND in Settings, so that's not too much of a problem, and IIRC the signature's on Nintendo's servers, so would this be feasible?

 

[Roboman]

You cannot sign files so easily. Signatures are very easy to check, but nearly impossible to forge without the right key.

 

[dpad_5678]

Click bait as fuck. There's no "concept" here. It's an idea that's been thought over thousands of times already.

 

[andree123]

Does a simple sd loader has its own Signature?

 

[Gericom]

Every single byte you change will change the signature and without the key (or a bug in the signature checking) it's impossible to sign this ourselves

 

[The Real Jdbye]

Since Flipnote and the DSi Browser are encrypted using the DSi's common key AND since there's a way to turn these into .nds-format ROMs, would there be a way to write, say, a simple SD loader, inject it into a decrypted DSiWare image, re-encrypt and re-sign the new image, then copy it onto NAND?
If you encrypted/signed it properly, you could just copy it to NAND in Settings, so that's not too much of a problem, and IIRC the signature's on Nintendo's servers, so would this be feasible?

Wait for the new DSi exploit

 

[andree123]

I think we need to research more on signatures.

 

[ParzivalWolfram]

Every single byte you change will change the signature and without the key (or a bug in the signature checking) it's impossible to sign this ourselves

Flipnote and DSi Browser use the DSi's Common Key, which we have. So we can sign.

 

[DinohScene]

Doing that basically defeats the purpose of having a homebrew loader/channel
And like Gericom said, you can't change bytes without breaking signatures.
Seeing the DSi actually is "good" at checking sigs, this won't happen.

 

[Gericom]

Flipnote and DSi Browser use the DSi's Common Key, which we have. So we can sign.

No, the common key we have (which is a public key) can only be used for checking. Only nintendo has the private key required to sign.