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4.01 is out.. what now

B737 said:
if your blobs are saved, i believe, you can always downgrade to the firmware that your saved blob was by pointing itunes to Saurik's server.

so technically you should be able to upgrade without fear, knowing you can always roll back. (as long as your hashed)

correct?
Click to expand...

How do you save blobs?
 
thelatinist said:
It is too late to save your 4.0 SHSH. Notcom has confirmed that the signing window is closed. You can now only install 4.0.1 if you do not have your 4.0 SHSH saved.
Click to expand...

Can you explain why the "signing window" is closed? I'm not getting that part. If people haven't upgraded to 4.0.1 yet, why can't they still save the blobs?
 
rwilliams said:
Can you explain why the "signing window" is closed? I'm not getting that part. If people haven't upgraded to 4.0.1 yet, why can't they still save the blobs?
Click to expand...

SHSHs can only be obtained from Apple's server, because they have to be signed using Apple's private key. This is why your SHSH for a firmware version can only be obtained while Apple is still signing that version. SHSH stands for signature hash, and is just a technical term for an encrypted signature attached to a message (in this case, the message authorizing installation of a version of the iPhone firmware).

The SHSH is not saved anywhere on your device or in a backup. It is used only briefly to authorize an installation, and is requested anew for each installation. It is different for each version of the firmware. TinyUmbrella can save your SHSH as it is returned by Apple, but only if you request it while Apple is still signing. Same for Cydia. They take advantage of the fact that Apple failed to include a time check in their authorization scheme, so the same SHSH is returned each time you request the same version. This was really poor security design on Apple's part, since it make it possible to spoof Apple's server as long as you cache your SHSH for each version while Apple is still signing.

As soon as Apple stops signing a version of the firmware, it can no longer be requested and cached. And it is absolutely impossible to generate a new SHSH yourself unless you can obtain Apple's private signing key. Good luck with that.
 
If anyone has a second maybe someone can expplain this to me, not new to iphones but new to all this....i did save my 4.0 blobs but only cause every one said we should...now if we jailbreak 4.0 why would we need our 4.0 blobs? What does it do for us. This may be a very stupid question but like i said im new to this. What i kind of get out of it is that if we jailbreak 4.0 and need to go back to an unjailbroken 4.0 we can because our 4.0 blobs are saved. if they werent we would have to go to 4.01 which may not be jailbroken. is that right?
 
Anyone know if there's a way to check if your 4.0 blob was backed up to Cydia? I'm 99.9% sure I did, but I wish there was a way to check.
 
jbarresi19 said:
If anyone has a second maybe someone can expplain this to me, not new to iphones but new to all this....i did save my 4.0 blobs but only cause every one said we should...now if we jailbreak 4.0 why would we need our 4.0 blobs? What does it do for us. This may be a very stupid question but like i said im new to this. What i kind of get out of it is that if we jailbreak 4.0 and need to go back to an unjailbroken 4.0 we can because our 4.0 blobs are saved. if they werent we would have to go to 4.01 which may not be jailbroken. is that right?
Click to expand...

having the SHSH allows you to rollback your firmware
 
jbarresi19 said:
If anyone has a second maybe someone can expplain this to me, not new to iphones but new to all this....i did save my 4.0 blobs but only cause every one said we should...now if we jailbreak 4.0 why would we need our 4.0 blobs? What does it do for us. This may be a very stupid question but like i said im new to this. What i kind of get out of it is that if we jailbreak 4.0 and need to go back to an unjailbroken 4.0 we can because our 4.0 blobs are saved. if they werent we would have to go to 4.01 which may not be jailbroken. is that right?
Click to expand...

It will allow you to restore to 4.0 if you ever need to. Without your SHSH saved, you would be required to upgrade to 4.0.1, which may not be jailbreakable (or unlockable).
 
jmack549 said:
Anyone know if there's a way to check if your 4.0 blob was backed up to Cydia? I'm 99.9% sure I did, but I wish there was a way to check.
Click to expand...

Usually Cydia will display the firmware versions for which you have SHSH saved at the top of the home screen. There is currently a bug which prevents 4.0 form showing up there, though. This does not mean you don't have it on file if you clicked "Make My Life Easier" or used TinyUmbrella.
 
jmack549 said:
Anyone know if there's a way to check if your 4.0 blob was backed up to Cydia? I'm 99.9% sure I did, but I wish there was a way to check.
Click to expand...

hey bud i might be wrong and anyone correct me if i am, but in tiny umberalla after its done it says it was sent to Cydia....
 
jbarresi19 said:
hey bud i might be wrong and anyone correct me if i am, but in tiny umberalla after its done it says it was sent to Cydia....
Click to expand...

Oh I know, that's why I'm 99.9% sure it did, just want to know without a doubt ya know? Just wish I had Cydia now so I could boot it up and see it up there at the top.
 
murdercitydevil said:
what if you saved it locally? I was able to save 4.0 blobs locally...can I update to 4.0.1 safely?
Click to expand...

That's fine. It just means you'd have to start your own TSS server if you want to downgrade instead of using Saurik's server. But why do you want to update to 4.0.1?
 
if TinyUmbrella saved the local copy then its saved on Saurik's server...

i believe.
 
Why is a serial number bad. What can you do with some1s serial number?
I edited out long ago but Arisian quoted me lol.
 
mefromfl said:
can you please help me find the "no" button?
Click to expand...

Its right next to the "Yes" :D
B737 said:
if your blobs are saved, i believe, you can always downgrade to the firmware that your saved blob was by pointing itunes to Saurik's server.

so technically you should be able to upgrade without fear, knowing you can always roll back. (as long as your hashed)

correct?
Click to expand...

Thats correct but the baseband cannot be rolled back if you plan on unlocking your phone.
 
thelatinist said:
SHSHs can only be obtained from Apple's server, because they have to be signed using Apple's private key. This is why your SHSH for a firmware version can only be obtained while Apple is still signing that version. SHSH stands for signature hash, and is just a technical term for an encrypted signature attached to a message (in this case, the message authorizing installation of a version of the iPhone firmware).

The SHSH is not saved anywhere on your device or in a backup. It is used only briefly to authorize an installation, and is requested anew for each installation. It is different for each version of the firmware. TinyUmbrella can save your SHSH as it is returned by Apple, but only if you request it while Apple is still signing. Same for Cydia. They take advantage of the fact that Apple failed to include a time check in their authorization scheme, so the same SHSH is returned each time you request the same version. This was really poor security design on Apple's part, since it make it possible to spoof Apple's server as long as you cache your SHSH for each version while Apple is still signing.

As soon as Apple stops signing a version of the firmware, it can no longer be requested and cached. And it is absolutely impossible to generate a new SHSH yourself unless you can obtain Apple's private signing key. Good luck with that.
Click to expand...

Thanks. I wasn't aware that even when backing the blobs up, we were going through Apple's servers. I assumed that they were also stored somewhere on the devices. Now it all makes sense.
 
We don't even know what 4.0.1 is supposed to fix yet might just be the antenna issue. even at that it's not really going to fix the problem from what they described.. you guys are funny

Dev-Team we want JB/UL now
Apple we want firmware update now..

If you are into jb these two do not go together! sometime JB are way back in firmware... there is still people on 3.0 3.0.1 3.1.2 etc.. relax wait for musclenerd or don't complain if it delays your jb/ul ;)
 
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