08-19-2019, 01:02 PM | #46 |
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Few days left before I've to send back my oasis (2019).
Just out of curiosity, has a factory firmware (5.12.0) been leaked/extracted already? |
08-19-2019, 03:09 PM | #47 |
BLAM!
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Nope, despite a few attempts.
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08-19-2019, 03:34 PM | #48 | |
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Quote:
There seems to be an effort (at least on some devices/firmwares) to "burn" the first 8K bytes of the factory firmware on start-up. It may be difficult to "un-burn" the factory firmware, depending on just 'how' Amazon/Lab126 has decided to do the 'burn'. |
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08-20-2019, 03:51 PM | #49 | |
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Burn the factory firmware to what exactly? (As in "burn to CD-R", "burn to flash", etc) And what exactly prevents people from using the serial port? Have they finally "remembered" to lock down the bootloader? |
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08-20-2019, 03:59 PM | #50 |
hopeless n00b
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08-20-2019, 04:52 PM | #51 | |
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It looks like they have on the PW4. |
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08-20-2019, 06:02 PM | #52 |
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Both recent and current models seem to have different quirks even for the same firmware version.
It may take even longer than usual to provide jailbreak(s) for each individual model/firmware version pairing. Q: Can J.B. hire more programmers to make our hobby even more difficult? |
08-21-2019, 04:08 AM | #53 | |
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Or is there something I don't understand? |
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08-21-2019, 04:11 AM | #54 | |
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Quote:
So the only hope (apart from some exploit or the other, a la iPhone jailbreak) is to desolder, flash, and resolder the eMMC, possibly flashing a modified U-Boot as an unlocked bootloader and/or to bypass signature checks? As for the destructive teardown attempts at the KOA2 ... why? They didn't use sorcery to put it together, did they? Last edited by WaseemAlkurdi; 08-21-2019 at 04:16 AM. |
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08-22-2019, 03:43 PM | #55 |
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Tomorrow my KOA3 will take the long way home.
All in all I'm very thankfull now for all the people here in the fore- and background who granted us all a limited period of freedom and sunshine when we were able to buy and own as well our new and shiny Kindle devices. Now the winter is coming again but at least I have 2 rather new kindles a KOA2 and and a PW4 to hold on. A very big Thank You! Matthias |
08-22-2019, 05:12 PM | #56 | |
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The signature uses public key (key pairs, public and private) encryption. The Kindles only have the public key, the update_*.bin files are created with the private key. You can read all the gory details in "KindleTool". That utility is able to package and un-package the update_*.bin files, both Amazon and Mobileread. Of course, Amazon does not provide us with their private key so we have to use our own key-pair. Last edited by knc1; 08-22-2019 at 05:17 PM. |
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08-22-2019, 06:42 PM | #57 | |
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But how does that relate to the "flashing" that the stock firmware is said to be doing on each boot? |
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08-22-2019, 08:10 PM | #58 | |
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Quote:
What is being done is to the contents of the update package, if/when it is found on the area used for visible USB storage. No header available on the file, file is not recoverable. Load KindleTool and run an '--info' command against one of the .bin packages.* That will show you what is missing when Lab126 "burns" the package header contents, contents of the package file, not of what is already installed. * Use just the command name (kindletool) by itself to output the command description. |
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08-24-2019, 03:18 AM | #59 | ||
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Quote:
Quote:
To counter that, and provided that U-Boot isn't checking signatures or anything fancy, a single Kindle has to be manually flashed (aka write to eMMC) with manually jailbroken firmware to see what are system daemons, etc doing. Now, who's going to donate their Kindle? |
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08-24-2019, 08:10 AM | #60 |
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If there's an initiative to buy an OASIS 3 for testing I would donate up to 50 bucks.
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