Last active
April 4, 2018 11:02
-
-
Save tst2005/449b3d2030c995c4c480716d0a94844e to your computer and use it in GitHub Desktop.
curl URL | ./pipesum.sh hashvalue | bash
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/sh | |
sumfile="$(mktemp)" | |
tmpfile="$(mktemp)" | |
trap "rm -f -- '$tmpfile' '$sumfile'" EXIT | |
verbose=false | |
cmd='auto' | |
hashvalue='' | |
while [ $# -gt 0 ]; do | |
case "$1" in | |
('-v') verbose=true;; | |
('-q') verbose=false;; | |
(auto|md5sum|sha*sum) cmd="$1";; | |
(*) | |
if [ -n "$hashvalue" ]; then | |
echo >&2 "Only one hashvalue is supported" | |
exit 1 | |
fi | |
hashvalue="$1" | |
;; | |
esac | |
shift | |
done | |
showusage=true | |
if [ -n "$hashvalue" ]; then | |
if [ "$cmd" = "auto" ]; then | |
case "${#hashvalue}" in | |
(0) ;; | |
(32) cmd=md5sum;; | |
(40) cmd=sha1sum;; | |
(56) cmd=sha224sum;; | |
(64) cmd=sha256sum;; | |
(96) cmd=sha384sum;; | |
(128) cmd=sha512sum;; | |
(*) | |
echo >&2 "autodetection failed unknown hashsize" | |
exit 1 | |
;; | |
esac | |
fi | |
case "$cmd" in | |
(md5sum|sha1sum|sha224sum|sha256sum|sha384sum|sha512sum) showusage=false;; | |
esac | |
fi | |
if ${showusage:-false}; then | |
echo >&2 "Usage: $0 [-v|-q] [md5sum|sha1sum|sha224sum|sha256sum|sha384sum|sha512sum] <checksumvalue>" | |
exit 1 | |
fi | |
cat ->"$tmpfile" | |
echo "$hashvalue $tmpfile">"$sumfile" | |
if ! "$cmd" >/dev/null 2>&1 -c "$sumfile"; then | |
echo >&2 "$0: integrity check failed" | |
exit 1 | |
fi | |
cat -- "$tmpfile" |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment