iFone


Bypassing the Overlord, Apple’s signature server,
二月 20, 2010, 3:48 下午
Filed under: iPhone 技術交流

http://www.saurik.com/id/12

http://www3.uwants.com/viewthread.php?tid=9421619&extra=page%3D1&page=1

一次越狱,终身越狱!]备份ECID和.shsh--(正在整理恢复3.12固件)

http://bbs.weiphone.com/read-htm-tid-550185.html

Bypassing the Overlord

To this end, I have constructed a server that duplicates the functionality exposed by Apple’s signature server, except using “on file" results rather than live requests.

All we need, then, is to make iTunes use it. Luckily, most operating systems also have the ability to locally define bypasses on specific hostnames through a file called hosts. Using this, we can redirect requests to Apple’s signature server to Cydia.

So, open the file C:\Windows\System32\drivers\etc\hosts (Windows) or /etc/hosts (Mac OS X) and add the following entry to the bottom of the file.

74.208.10.249 gs.apple.com

Now, when iTunes thinks it is talking to Apple, it is talking to Cydia instead. Doing this will allow iTunes to access signatures already stored by Cydia’s “on file" feature.

This server will also act as a cache for any SHSH blobs it hasn’t seen, acting as an intermediary to Apple’s server. This effectively registers your device with the “on file" mechanism, which means you can now enjoy the protections of being able to downgrade your firmware in the future even if you aren’t jailbroken.

This point should be stressed: even if you don’t jailbreak, and even if you never intend to jailbreak, you should consider using the new “on file" service.

Let’s say that Apple releases an OS upgrade in the future, you take it, and they break something important. Maybe they break your e-mail account, or your todo list. Your business is now crippled.

If only you could downgrade, right? Alas, Apple won’t let you anymore. That’s where the new signature cache server comes in: by doing your restores through this server you secure your ability to not accept upgrades from Apple if the need is dire.

from saurik


發表迴響 so far
發表留言



發表迴響

在下方填入你的資料或按右方圖示以社群網站登入:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / 變更 )

Twitter picture

You are commenting using your Twitter account. Log Out / 變更 )

Facebook照片

You are commenting using your Facebook account. Log Out / 變更 )

Google+ photo

You are commenting using your Google+ account. Log Out / 變更 )

連結到 %s



%d 位部落客按了讚: