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| author |   Ken Sharp <ken.sharp@ni.com> | 2014-07-17 16:56:55 -0500 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2014-07-19 00:08:47 +0100 |
| commit | 0a41a7c20316c7d3330233a624d8cf20ea5a81ae (patch) | |
| tree | 708a71bd358b8228c285496819e335699953a6cc /meta/recipes-core/initscripts | |
| parent | 558ba23cfdd60bf64b9214460a2772be70079796 (diff) | |
| download | openembedded-core-0a41a7c20316c7d3330233a624d8cf20ea5a81ae.tar.gz | |
initscripts: Use current date as an additional source of entropy
If the seed file is empty or does not exist, the date is an extremely
poor backup source of entropy, but it is better than nothing.
Signed-off-by: Richard Tollerton <rich.tollerton@ni.com>
Signed-off-by: Ben Shelton <ben.shelton@ni.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-core/initscripts')
| -rwxr-xr-x | meta/recipes-core/initscripts/initscripts-1.0/urandom | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/meta/recipes-core/initscripts/initscripts-1.0/urandom b/meta/recipes-core/initscripts/initscripts-1.0/urandom index a0549dec25..ec4ef61f23 100755 --- a/meta/recipes-core/initscripts/initscripts-1.0/urandom +++ b/meta/recipes-core/initscripts/initscripts-1.0/urandom @@ -20,12 +20,11 @@ RANDOM_SEED_FILE=/var/lib/urandom/random-seed case "$1" in start|"") test "$VERBOSE" != no && echo "Initializing random number generator..." - # Load and then save 512 bytes, - # which is the size of the entropy pool - if test -f "$RANDOM_SEED_FILE" - then - cat "$RANDOM_SEED_FILE" >/dev/urandom - fi + # Load and then save 512 bytes, which is the size of the entropy + # pool. Also load the current date, in case the seed file is + # empty. + ( date +%s.%N; [ -f "$RANDOM_SEED_FILE" ] && cat "$RANDOM_SEED_FILE" ) \ + >/dev/urandom rm -f "$RANDOM_SEED_FILE" umask 077 dd if=/dev/urandom of=$RANDOM_SEED_FILE count=1 \ |