87 lines
2.0 KiB
Bash
Executable File
87 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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# Author: F. Bischof (info@meer-web.nl)
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# URL: https://github.com/Meer-Web/openssl_file_encryption
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# Check for input file
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if [ -n "$2" ]
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then
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INPUT=$2
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if [ ! -e "$INPUT" ];
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then
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echo "Input file does not exist!"
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exit 2
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fi
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else
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echo "Usage: ./crypter.sh -[e/d] [inputfile]";
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exit 1
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fi
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# Check if algos are set
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if [ ! -f ~/.crypter/.algos ]
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then
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mkdir -p ~/.crypter
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echo "ALGOS=\"-des-ede3-cbc -pbkdf2\"" > ~/.crypter/.algos
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fi
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source ~/.crypter/.algos
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# Check method
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case "$1" in
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"-e")
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echo "Encrypting file ${INPUT}"
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HASH=$(sha256sum $INPUT | awk '{ print $1 }')
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OUTPUT="${INPUT}.${HASH}.crypto"
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openssl enc $ALGOS -salt -in ${INPUT} -out ${OUTPUT}.temp
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base64 ${OUTPUT}.temp > ${OUTPUT}
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rm -f ${OUTPUT}.temp
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if [ "`stat ${OUTPUT} | grep Size | awk '{ print $2}'`" != 0 ]
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then
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# OK - safe to delete the original input file
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echo "OK - Deleting file ${INPUT}"
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rm -f ${INPUT}
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exit 0
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else
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# NOK - remove empty output file
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echo "CRITICAL - Output file ${OUTPUT} is 0 bytes! Not removing the source file ${INPUT}"
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rm -f ${OUTPUT}
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exit 2
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fi
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;;
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"-d")
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echo "Decrypting file ${INPUT}";
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OUTPUT=$(echo $INPUT | sed 's/\.crypto//')
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HASH=$(echo $OUTPUT | sed 's/^.*\.//')
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base64 -d ${INPUT} > ${INPUT}.temp
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openssl enc -d $ALGOS -in ${INPUT}.temp -out ${OUTPUT}
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rm -f ${INPUT}.temp
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if [ "`stat ${OUTPUT} | grep Size | awk '{ print $2}'`" != 0 ]
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then
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# SHA256SUM CHECK
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CUR_HASH=$(sha256sum ${OUTPUT} | awk '{ print $1 }')
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if [ "${HASH}" != "${CUR_HASH}" ]
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then
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# NOK - Hash mismatch
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echo "CRITICAL - Hashes mismatching!"
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rm -f ${OUTPUT}
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exit 2
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else
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# OK - safe to delete the original input file
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echo "OK - Hashes matching, deleting input file"
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rm -f ${INPUT}
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mv ${OUTPUT} $(echo $OUTPUT | sed 's/\..*//')
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exit 0
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fi
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else
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# NOK - remove empty output file
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echo "CRITICAL - Output file is 0 bytes! Not removing the input file"
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rm -f ${OUTPUT}
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exit 2
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fi
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exit 0
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;;
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*)
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echo "Usage: ./crypter.sh -[e/d] [inputfile]";
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exit 1
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;;
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esac
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exit 3
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