mirror of
https://github.com/GrapheneOS/infrastructure.git
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20 lines
560 B
Bash
Executable file
20 lines
560 B
Bash
Executable file
#!/bin/bash
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set -o errexit -o nounset -o pipefail
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umask 077
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if [[ -e /etc/tcp_fastopen_seed ]]; then
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rand=$(b3sum --keyed -l 16 --no-names </etc/tcp_fastopen_seed <(date -uI))
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else
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rand=$(xxd -l 16 -p /dev/random)
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fi
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new_key=${rand:0:8}-${rand:8:8}-${rand:16:8}-${rand:24:8}
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echo new_key: $new_key
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old_key="$(sysctl net.ipv4.tcp_fastopen_key | awk '{ print $3 }' | cut -d ',' -f 1)"
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echo old_key: $old_key
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echo "net.ipv4.tcp_fastopen_key=$new_key,$old_key" >/etc/sysctl.d/50-tcp_fastopen_key.conf
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sysctl -p /etc/sysctl.d/50-tcp_fastopen_key.conf
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