mirror of
https://github.com/notwa/rc
synced 2024-11-05 06:29:02 -08:00
118 lines
3.9 KiB
Bash
Executable file
118 lines
3.9 KiB
Bash
Executable file
#!/usr/bin/env sh
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__obtain_die() {
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__obtain_code="$?"
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printf >&2 'obtain: %s\n' "$*"
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[ "$__obtain_code" = 0 ] && exit 2 || exit "$__obtain_code"
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}
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__obtain_burl() ( # eaguru.guru/t/burl.sh specialized for this script. 343 bytes
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# both methods exhibit a 45 second timeout on my machine.
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X(){ printf %s\\r\\n "GET /${Q#/} HTTP/1.0" "Host: $D" '';}
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Y(){ while IFS=$R read -r A B;[ "$A" ];do :;done;cat;}
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U="${1#http://}" H="${U%%/*}" Q="${U#"$H"}" D="${H%:*}"
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[ "$H" = "${D:?}" ]&&P=80||P="${H##*:}";R=$(printf \\r)
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if (: </dev/udp/localhost/0)2>&-;then exec 3<>"/dev/tcp/$D/$P"&&X>&3&&Y<&3
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else X|/usr/bin/env nc -- "$D" "$P"|Y;fi
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)
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__obtain_url() {
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__obtain_die "run __obtain_prep first"
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}
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__obtain_signed() {
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set -- "${1:?no source}" "${2:?no destination}" "${3:-"$__obtain_x"}"
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__obtain_url "t.glorp.wang/$1$3" > "$2$3" &&
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__obtain_url "t.glorp.wang/$1$3.minisig" > "$2$3.minisig" ||
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__obtain_die "failed to download $2 ($1)"
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./minisign -QVm "$2$3" -P "$__obtain_public_key" >/dev/null ||
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__obtain_die "failed to validate $2$3 ($1$3)"
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rm "$2$3.minisig"
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if [ "$3" = .gz ]; then
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gzip -k -d -f "$2$3" || __obtain_die "failed to extract $2$3 ($1$3)"
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rm "$2$3"
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fi
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}
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__obtain_prep() { # can be run many times in case curl/wget becomes available.
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gzip -V >/dev/null 2>&1 && __obtain_x=.gz || __obtain_x=
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if curl; [ $? = 2 ]; then __obtain_url() { curl -sfL -m45 -o- "$*" ;}
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elif wget; [ $? = 1 ]; then __obtain_url() { wget -qt1 -T45 -O- "$*" ;}
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elif __obtain_burl microsoft.com >/dev/null
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then __obtain_url() { __obtain_burl "$*" ;}
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else __obtain_die "missing curl, wget, bash (/dev/tcp), and nc (netcat)"
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fi 2>&-
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}
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__obtain() {
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__obtain_prep
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arch="$(exec uname -m)" || __obtain_die "uname is missing"
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case "$arch" in (*[!A-Za-z0-9._-]*) false; esac ||
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__obtain_die '`uname -m` returned something insane:' "$arch"
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if [ -d /C ]; then
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[ "$arch" = x86_64 ] || __obtain_die "only x86_64 Windows is supported"
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arch=exe
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fi
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umask 0077 && mkdir -p ~/play/bootstrap && cd ~/play/bootstrap ||
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__obtain_die "failed to make bootstrap directory"
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__obtain_url t.glorp.wang/minisign."$arch" > minisign ||
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__obtain_die "failed to download minisign files"
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case "$arch" in
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(exe) sum=6537b1da726d593877dc21720d8f8c44e6c7485da3dfddddee73e8b457e49b1a;;
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(x86_64) sum=9f1adb1db8e70def95f4ace883ab2f8c0484df561d80daa9d008776d487e9b34;;
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(aarch64) sum=79f69db01bc98201e02644d0ccb217b3593e4ed2067d56a73f7442e234212883;;
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(*) __obtain_die "invalid value for \$arch: $arch"
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esac
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case "$arch" in
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(exe) repo=https://bin.ajam.dev/x64_Windows/;;
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(aarch64) repo=https://bin.ajam.dev/aarch64_arm64_Linux/;;
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(x86_64) repo=https://bin.ajam.dev/x86_64_Linux/;;
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esac
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echo "$sum" \*minisign > minisign.sha256 &&
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sha256sum -c minisign.sha256 >/dev/null ||
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__obtain_die "failed to validate minisign"
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rm minisign.sha256
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chmod +x minisign || __obtain_die
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# this key is for files that i've personally signed myself.
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__obtain_public_key=RWQdYTxDsppw5ZFpYZFoF6IoPS0okMKlOiz9MwTl0NUoP41r57sf9dI1
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__obtain_signed "curl.$arch" curl
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# this key is only for files signed by my server, not myself.
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__obtain_public_key=RWQo7HxrRBmGLN2s7OuAYwGyeuDH0hEaCxsTBvseux8awYNbmP3b5rCg
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__obtain_signed cacert.pem cacert.pem
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curl="$(readlink -f "curl")" && cert="$(readlink -f "cacert.pem")" ||
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__obtain_die "failed to determine paths to bootstrap files"
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# TODO: escape paths in case they contain spaces or special characters.
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eval "__obtain_url() { $curl --cacert $cert -qsfL -m45 -o- \"\$*\" ;}"
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#__obtain_url https://ipinfo.io
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# FIXME? curl is still accessing these files:
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# $ strace -fe trace=file ~/play/bootstrap/curl -q --cacert ~/play/bootstrap/cacert.pem https://example.com
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# /etc/hosts
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# /etc/netsvc.conf
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# /etc/nsswitch.conf
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# /etc/resolv.conf
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# /etc/svc.conf
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# /etc/ssl/certs/9f4c149e.0
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}
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obtain()(__obtain "$@")
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[ -n "${preload+-}" ] || __obtain "$@"
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# cursed modeline:
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# vim:ft=bash ts=3 sw=3 noet sts=3
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