mirror of
https://github.com/5im-0n/sshenc.sh.git
synced 2025-08-03 03:40:14 +02:00
79 lines
1.9 KiB
Bash
Executable File
79 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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# A POSIX variable
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OPTIND=1 # reset in case getopts has been used previously in the shell.
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public_key= #"~/.ssh/id_rsa.pub"
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private_key= #"~/.ssh/id_rsa"
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me=`basename "$0"`
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show_help() {
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cat << EOF
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usage: $me [-p <public ssh key> | -s <private ssh key>] [-h]
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examples:
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- encrypt a file
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$me -p ~/.ssh/id_rsa.pub < plain-text-file.txt > encrypted.txt
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- decrypt a file
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$me -s ~/.ssh/id_rsa < encrypted.txt
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$me home page: https://git.e.tern.al/s2/sshencdec
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EOF
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}
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cleanup() {
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rm -f "$temp_file"
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rm -f "$temp_file_key"
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rm -f "$temp_file_key.enc"
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}
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while getopts "h?p:s:" opt; do
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case "$opt" in
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h|\?)
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show_help
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exit 0
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;;
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p) public_key=$OPTARG
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;;
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s) private_key=$OPTARG
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;;
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esac
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done
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shift $((OPTIND-1))
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[ "$1" = "--" ] && shift
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temp_file="$(mktemp "${TMPDIR:-/tmp}/$(basename "$0").XXXXXX.enc")"
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temp_file_key="$(mktemp "${TMPDIR:-/tmp}/$(basename "$0").XXXXXX.key")"
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trap cleanup EXIT
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#encrypt
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if [[ -e "$public_key" ]]; then
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openssl rand 32 > $temp_file_key
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if openssl rsautl -encrypt -pubin -inkey <(ssh-keygen -f "$public_key" -e -m PKCS8) -in "$temp_file_key" -out "$temp_file_key.enc"; then
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if openssl enc -aes-256-cbc -salt -pass file:$temp_file_key > "$temp_file"; then
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echo "-- encrypted with https://git.e.tern.al/s2/sshencdec"
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echo "-- key"
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echo "$(openssl base64 -in "$temp_file_key.enc")"
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echo "-- /key"
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openssl base64 < "$temp_file"
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fi
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fi
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#decrypt
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elif [[ -e "$private_key" ]]; then
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stdin=`cat`
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key_enc=$(echo "$stdin" | awk '/-- key/{f=1;next} /-- \/key/{f=0} f')
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cypher=$(echo "$stdin" | sed -e '1,/-- \/key/d')
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echo "$key_enc" | openssl base64 -d | openssl rsautl -decrypt -ssl -inkey "$private_key" > "$temp_file"
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echo "$cypher" | openssl base64 -d | openssl aes-256-cbc -d -pass file:"$temp_file"
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else
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show_help
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exit 1
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fi
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