它最近带到了我的注意它没有。有人可以证实这一点并解释确定特征是什么决定是否需要闪存自定义ROM所需的根源?
它最近带到了我的注意它没有。有人可以证实这一点并解释确定特征是什么决定是否需要闪存自定义ROM所需的根源?
It was recently brought to my attention that it does not. Can someone confirm this and explain what the determining characteristics are that dictate whether or not root its required to flash a custom ROM?
方法我知道:
使用载体/制造商工具,如 odin 为某些三星手机(我已经完成了这一点 - 它很容易是最可行的方法)。当手机处于下载模式时,它连接到手机并写入手机存储。知识渊博的人可能也可以编写自己的工具。
签署update.zip文件,以便恢复/ bootloader考虑其官方更新。这真的是大多数手机可以区分它们的唯一方法(不确定加密的引导程序是否更加困难)。
"有没有人这样做的?" 我不知道 - 这可能非常难以伪造,但是现实地有人可以访问签名软件。
使用jig(直接连接到设备的一部分的电子设置)直接写入存储。想象一下手机作为PC,BIOS防止写入硬盘驱动器 - 如果您不启动计算机,BIOS无法干扰,所以您可以删除驱动器并用其他内容写入它。芯片没有像驱动器一样可拆卸,因此夹具。这可能需要定制软件进行写作,再次可能从制造商中获取。如果您不覆盖引导加载程序,则可能会遇到问题,具体取决于它的检查,我不确定。
在以前的工作(手机制造商)中,他们将类似的工具与Odin相似以替换引导加载程序,有时是一个不要求ROM要签名的工具。访问像这样的工具会让很多问题消失。
Methods I know of:
Use a carrier/manufacturer tool such as Odin for some Samsung phones (I've done this -- it's easily the most feasible method). It connects to the phone and writes to the phone storage when the phone is in Download mode. A knowledgeable person could probably write their own tool as well.
Sign the update.zip file, so that the recovery/bootloader thinks its an official update. That's really the only way most phones can distinguish them (not sure if an encrypted bootloader makes it harder).
"Has anyone actually done this?" That I don't know -- it's probably incredibly difficult to fake, but realistically someone could gain access to the signing software.
Use a jig (an electronic setup that connects directly to parts of the device) to write directly to the storage. Imagine the phone as a PC where the BIOS prevents writing to the hard drive -- if you don't boot up the computer, the BIOS can't interfere, so you could just take out the drive and write to it with something else. Chips are just not as removable as drives, hence the jig. This would probably require custom software to do the writing, again possibly taken from the manufacturer. And if you don't overwrite the bootloader you might run into problems depending on what checks it does, I'm not sure.
At a previous job (a phone manufacturer) they used a similar tool to Odin to replace the bootloader, sometimes with one that didn't require the ROMs to be signed. Access to a tool like that makes a lot of problems go away.
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