This is my patch to make loop-aes use /dev/random exclusively, and exit otherwise (no fallback). It's not perfect, it allows /dev/urandom to be used to hit the swap space, during swapoff, so sha can hash it to generate fallback entropy, even though swapon will exit before that happens... fixing this could involve a #define or ./configure option. I did the fewest modifications possible while still achieving my goal. This patch should be functional: http://www.linuxfromscratch.org/~robert/new/patches/util-linux-ng-2.14.1-use_dev_random.diff
Only use this with rngd, or else you may wait for /dev/random for a very long time when mounting swap. robert
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