116 lines
2.6 KiB
Bash
Executable File
116 lines
2.6 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
#
|
|
## generate SRI checksums
|
|
#
|
|
|
|
### text formatting presets
|
|
if command -v tput > /dev/null; then
|
|
cyan=$(tput setaf 6)
|
|
err=$(tput bold)$(tput setaf 1)
|
|
magenta=$(tput setaf 5)
|
|
norm=$(tput sgr0)
|
|
ok=$(tput setaf 2)
|
|
else
|
|
cyan=''
|
|
err=''
|
|
magenta=''
|
|
norm=''
|
|
ok=''
|
|
fi
|
|
|
|
### trap
|
|
trap trapExit 1 2 3 6
|
|
|
|
### functions
|
|
displayError (){
|
|
printf "\n%sERROR: %s\n" "$err" "$2"
|
|
printf "Exiting now.%s\n\n" "$norm"
|
|
exit "$1"
|
|
}
|
|
|
|
scriptHelp (){
|
|
printf "\nSeems you need some help?\n\n"
|
|
exit 0;
|
|
}
|
|
|
|
trapExit (){
|
|
printf "\n%sERROR: Caught signal. Exiting.%s\n\n" "$err" "$norm"
|
|
exit 99
|
|
}
|
|
|
|
### default variables
|
|
algo='sha384'
|
|
unset filename
|
|
|
|
### check pre-requisites
|
|
if ! command -v openssl > /dev/null; then
|
|
displayError 2 'openSSL is not installed'
|
|
fi
|
|
|
|
### process startup parameters
|
|
if [ -z "$1" ]; then scriptHelp; fi
|
|
while [ $# -gt 0 ]; do
|
|
case "$1" in
|
|
-h|-\?|--help)
|
|
# display script help
|
|
scriptHelp
|
|
exit 0
|
|
;;
|
|
-2|--sha256)
|
|
# generate SRI using sha256
|
|
algo='sha256'
|
|
;;
|
|
-3|--sha384)
|
|
# generate SRI using sha384 (default)
|
|
algo='sha384'
|
|
;;
|
|
-5|--sha512)
|
|
# generate SRI using sha512
|
|
algo='sha512'
|
|
;;
|
|
-f|--file)
|
|
# file for which to generate SRI hash
|
|
if [ -n "$2" ]; then
|
|
if [ -f "$2" ]; then
|
|
filename="$2"
|
|
shift
|
|
else
|
|
displayError 3 "Cannot find file '${2}'."
|
|
fi
|
|
else
|
|
displayError 3 'No filename specified.'
|
|
fi
|
|
;;
|
|
*)
|
|
# unknown option
|
|
printf "\n%sUnknown option: %s.\n" "$err" "$1"
|
|
printf "%sUse '--help' for valid options.%s\n\n" "$cyan" "$norm"
|
|
exit 1
|
|
;;
|
|
esac
|
|
shift
|
|
done
|
|
|
|
printf "\n%sselected algo: %s%s\n" "$magenta" "$norm" "$algo"
|
|
printf "%sselected file: %s%s%s\n\n" "$magenta" "$norm" "$filename" "$norm"
|
|
|
|
### do SRI generation
|
|
hash=$( openssl dgst -${algo} -binary "${filename}" | openssl base64 -A) > /dev/null 2>&1
|
|
if [ -z "$hash" ]; then
|
|
displayError 4 'An error occurred while generating SRI hash.'
|
|
else
|
|
printf "%sSRI hash: %s%s-%s%s\n\n" "$magenta" "$ok" "$algo" "$hash" "$norm"
|
|
fi
|
|
|
|
exit 0
|
|
|
|
|
|
### error codes
|
|
# 0: no errors, normal execution
|
|
# 1: parameter error
|
|
# 2: cannot find openSSL binary
|
|
# 3: cannot find specified file for which to generate hash
|
|
# 4: error occured while executing openssl
|
|
|
|
#EOF |