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| author | Steven Barth <cyrus@openwrt.org> | 2013-06-06 09:52:00 +0000 |
|---|---|---|
| committer | Steven Barth <cyrus@openwrt.org> | 2013-06-06 09:52:00 +0000 |
| commit | 3f6736001282b5d0f79d34a4c34e2790f3233c20 (patch) | |
| tree | 364fe140d7a7ca3e2cb69fb2ef7fb89cecb7e06f /package/base-files/files | |
| parent | 2befaa2f0d2547a61a87204e3f1c42cf46888edd (diff) | |
| download | mtk-20170518-3f6736001282b5d0f79d34a4c34e2790f3233c20.zip mtk-20170518-3f6736001282b5d0f79d34a4c34e2790f3233c20.tar.gz mtk-20170518-3f6736001282b5d0f79d34a4c34e2790f3233c20.tar.bz2 | |
base-files: use less entropy when generating ULAs
SVN-Revision: 36865
Diffstat (limited to 'package/base-files/files')
| -rw-r--r-- | package/base-files/files/etc/uci-defaults/12_network-generate-ula | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/package/base-files/files/etc/uci-defaults/12_network-generate-ula b/package/base-files/files/etc/uci-defaults/12_network-generate-ula index f3e4931..56b7eb3 100644 --- a/package/base-files/files/etc/uci-defaults/12_network-generate-ula +++ b/package/base-files/files/etc/uci-defaults/12_network-generate-ula @@ -1,13 +1,10 @@ #!/bin/sh [ "$(uci get network.globals.ula_prefix)" != "auto" ] && exit 0 -# Sometimes results are empty, therefore try until it works... -local r1 r2 r3 -while [ -z "$r1" -o -z "$r2" -o -z "$r3" ]; do - r1=$(printf "%02x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 256))) - r2=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536))) - r3=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536))) -done + +r1=$(dd if=/dev/urandom bs=1 count=1 |hexdump -e '1/1 "%02x"') +r2=$(dd if=/dev/urandom bs=2 count=1 |hexdump -e '2/1 "%02x"') +r3=$(dd if=/dev/urandom bs=2 count=1 |hexdump -e '2/1 "%02x"') uci -q batch <<-EOF >/dev/null set network.globals.ula_prefix=fd$r1:$r2:$r3::/48 |