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#/bin/sh | |
{ | |
err() { | |
echo "$@" >&2 | |
exit 1 | |
} | |
USAGE="Usage: @todo" | |
generate() { | |
PRIVATE_KEY_FILE=$(mktemp /tmp/private.XXXXXX) | |
PUBLIC_KEY_FILE=$(mktemp /tmp/public.XXXXXX) | |
openssl genrsa -out "$PRIVATE_KEY_FILE" 4096 | |
openssl rsa -in "$PRIVATE_KEY_FILE" -outform PEM -pubout -out "$PUBLIC_KEY_FILE" | |
PUBLIC_KEY=$(<"$PUBLIC_KEY_FILE" base64 -w 0) | |
echo "$0 encrypt $PRIVATE_KEY_FILE $PUBLIC_KEY" | |
} | |
encrypt() { | |
PRIVATE_KEY_FILE="$1" | |
PUBLIC_KEY="$2" | |
if [ -z "$PRIVATE_KEY_FILE" ] || [ -z "$PUBLIC_KEY" ] | |
then | |
err "$USAGE" | |
fi | |
PUBLIC_KEY_FILE=$(mktemp /tmp/public.XXXXXX) | |
ENCRYPTED_FILE=$(mktemp /tmp/enc.XXXXXX) | |
<<<"$PUBLIC_KEY" base64 --decode > "$PUBLIC_KEY_FILE" | |
echo -n "Input secret: " | |
read -r SECRET | |
<<<"$SECRET" openssl rsautl -encrypt -inkey $PUBLIC_KEY_FILE -pubin -in /dev/stdin -out "$ENCRYPTED_FILE" | |
ENCRYPTED_SECRET=$(<"$ENCRYPTED_FILE" base64 -w 0) | |
echo "$0 decrypt $PRIVATE_KEY_FILE $ENCRYPTED_SECRET" | |
} | |
decrypt() { | |
PRIVATE_KEY_FILE="$1" | |
ENCRYPTED_SECRET="$2" | |
if [ -z "$PRIVATE_KEY_FILE" ] || [ -z "$ENCRYPTED_SECRET" ] | |
then | |
err "$USAGE" | |
fi | |
<<<"$ENCRYPTED_SECRET" base64 --decode | openssl rsautl -decrypt -in /dev/stdin -out /dev/stdout -inkey "$PRIVATE_KEY_FILE" | |
} | |
CMD="$1" | |
shift | |
if [ "$CMD" == "generate" ] | |
then | |
generate "$@" | |
elif [ "$CMD" == "encrypt" ] | |
then | |
encrypt "$@" | |
elif [ "$CMD" == "decrypt" ] | |
then | |
decrypt "$@" | |
else | |
err "$USAGE" | |
fi | |
} |
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