encrypted swsusp image
cover encrypted swsusp image
The following patches allow for encryption of the on-disk swsusp image to prevent data gathering of e.g. in-kernel keys or mlocked data after resume.
For this purpose the aes cipher must be compiled into the kernel as module load is not possible at resume time.
A random key is generated at suspend time, stored in the suspend header on disk and deleted from the header at resume time. If you don't resume a mkswap on the suspend partition will also delete the temporary key.
Only the data pages are encrypted as only these may contain sensitive data.
This works on my x86_64 laptop (64bit mode) and probably needs testing on other platforms.
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Andreas Steinmetz SPAMmers use [email protected]
Quoted 11 lines
The following patches allow for encryption of the on-disk swsusp image to prevent data gathering of e.g. in-kernel keys or mlocked data after resume.
For this purpose the aes cipher must be compiled into the kernel as module load is not possible at resume time.
A random key is generated at suspend time, stored in the suspend header on disk and deleted from the header at resume time. If you don't resume a mkswap on the suspend partition will also delete the temporary key. Only the data pages are encrypted as only these may contain sensitive data. This works on myx86_64laptop (64bit mode) and probably needs testing on other platforms.
What about an option for an user-defined key? One that can be set when suspending?
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Quoted 12 lines
Quoted 11 lines
The following patches allow for encryption of the on-disk swsusp image to prevent data gathering of e.g. in-kernel keys or mlocked data after resume.
For this purpose the aes cipher must be compiled into the kernel as module load is not possible at resume time.
A random key is generated at suspend time, stored in the suspend header on disk and deleted from the header at resume time. If you don't resume a mkswap on the suspend partition will also delete the temporary key. Only the data pages are encrypted as only these may contain sensitive data. This works on myx86_64laptop (64bit mode) and probably needs testing on other platforms.
Quoted 2 lines
What about an option for an user-defined key? One that can be set when suspending?
That's logical next step, but lets try to solve one problem at a time.
Pavel
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Boycott Kodak -- for their patent abuse against Java.