mirror of
https://github.com/hackerschoice/segfault.git
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28 lines
1.1 KiB
Bash
Executable File
28 lines
1.1 KiB
Bash
Executable File
#! /bin/bash
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create_load_seed()
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{
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[[ -n $SF_SEED ]] && return
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[[ ! -f "/config/host/etc/seed/seed.txt" ]] && {
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head -c 1024 /dev/urandom | tr -dc '[:alpha:]' | head -c 32 >/config/host/etc/seed/seed.txt || { echo >&2 "Can't create \${SF_BASEDIR}/config/etc/seed/seed.txt"; exit 255; }
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}
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SF_SEED="$(cat /config/host/etc/seed/seed.txt)"
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[[ -z $SF_SEED ]] && { echo >&2 "Failed to generated SF_SEED="; exit 254; }
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}
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[[ ! -d /config/guest ]] && { echo >&2 "Forgot -v \${SF_SHMDIR:-/dev/shm/sf}/config-for-guest:/config/guest?"; sleep 5; exit 253; }
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[[ ! -d /config/host/etc/seed ]] && { echo >&2 "Forgot -v config/etc/seed:/config/host/etc/seed?"; sleep 5; exit 252; }
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create_load_seed
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ip route del default
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ip route add default via 172.22.0.254
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# This is the GS_SECRET to get to SSHD (and gs-netcat in cleartext [-C] could be used).
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# It can be cryptographically weak. The security is provided by SSHD.
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GS_SECRET=$(echo -n "GS-${SF_SEED}${SF_FQDN}" | sha512sum | base64 | tr -dc '[:alpha:]' | head -c 12)
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[[ ! -f /config/guest/gsnc-access-22.txt ]] && echo "${GS_SECRET}" >/config/guest/gsnc-access-22.txt
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exec /gs-netcat -l -d "$1" -p 22 -s "22-${GS_SECRET}"
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