65 lines
1.4 KiB
Bash
65 lines
1.4 KiB
Bash
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#!/bin/bash
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usage() {
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echo "Usage: $0 [-h] [-e | -d] [-b] -k key -i iv"
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echo "Reads from stdin and encrypts or decripts to stdout."
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echo "key and iv must be provided as arguments."
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echo " -h print this summary"
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echo " -e encode mode (default)"
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echo " -d decode mode"
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echo " -k key specify 32 bytes encryption key"
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echo " -k iv specify 16 bytes initialization vector"
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exit 1
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}
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#defaults
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OPENSSL_ENC=-e
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optstring=":edbk:i:h"
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while getopts ${optstring} arg; do
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case ${arg} in
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e)
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#encode
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OPENSSL_ENC=-e
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;;
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d)
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#decode
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OPENSSL_ENC=-d
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;;
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b)
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#base64
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OPENSSL_BASE64=-a
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;;
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k)
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#encryption key
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if [[ "${#OPTARG}" != 32 ]]; then
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echo Please insert a 32 bytes key
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exit 1
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fi
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OPENSSL_KEY=$(echo -n ${OPTARG} | xxd -u -c 32 -ps)
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;;
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i)
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#initialization vector
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if [[ "${#OPTARG}" != 16 ]]; then
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echo Please insert a 16 bytes initialization vector
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exit 1
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fi
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OPENSSL_IV=$(echo -n ${OPTARG} | xxd -u -c 32 -ps)
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;;
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h)
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usage
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;;
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*)
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echo Invalid option: -${OPTARG}.
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usage
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;;
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esac
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done
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[[ -z $OPENSSL_KEY ]] && echo Please insert a 32 bytes key && exit 1
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[[ -z $OPENSSL_IV ]] && echo Please insert a 16 bytes initialization vector && exit 1
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while read line; do
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echo -n $line | openssl enc -aes-256-cbc $OPENSSL_ENC $OPENSSL_BASE64 -K $OPENSSL_KEY -iv $OPENSSL_IV
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done
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