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| 1 | #!/bin/bash | |
| 2 | ||
| 3 | # A Front-End to mcrypt and mdecrypt. | |
| 4 | # Store the executable script as xcrr and make a symbolic link | |
| 5 | # to the same file as xcrrd. | |
| 6 | # xcrr will encrypt, xcrrd will decrypt. | |
| 7 | ||
| 8 | # ©2016 Michael Uplawski <michael.uplawski@uplawski.eu> | |
| 9 | # Use at your own risk, modify as you please. | |
| 10 | ||
| 11 | # set your preferred crypto- and hash algorithm. Verify, | |
| 12 | # that they are supported by mcrypt | |
| 13 | DEF_ALGO='rijndael-256' | |
| 14 | DEF_HASH='sha256' | |
| 15 | ||
| 16 | # Some arrays will facilitate adaptations to the current | |
| 17 | # version of mcrypt | |
| 18 | ||
| 19 | declare -a FILES | |
| 20 | declare -a HASHES | |
| 21 | declare -a ALGOS | |
| 22 | ||
| 23 | # get the supported cryptographic algorithms | |
| 24 | ALGOS=($(mcrypt --list|cut -d\( -f1|tr -d "[:cntrl:]")) | |
| 25 | ||
| 26 | # get the supported hash algorithms | |
| 27 | HASHES=($(mcrypt --list-hash|cut -d':' -f2|tr -d "[:blank:]"|tr "\n" " ")) | |
| 28 | ||
| 29 | # set the names of the supported modes in a string | |
| 30 | # variable. These values are not yet presented by | |
| 31 | # mcrypt itself. CFB is the default, hence the '^'. | |
| 32 | MODES="ECB ^CFB OFB nOFB CBX STREAM" | |
| 33 | ||
| 34 | # default action (script xcrr) | |
| 35 | ACTION="encrypt" | |
| 36 | ICON="encrypt.png" | |
| 37 | ||
| 38 | # modify action do decrypt, if the script is called | |
| 39 | # as xcrrd | |
| 40 | if [ "xcrrd" == `basename "$0"` ] | |
| 41 | then | |
| 42 | ACTION="decrypt" | |
| 43 | ICON="decrypt.png" | |
| 44 | fi | |
| 45 | ||
| 46 | # find the default algorithm and mark it | |
| 47 | # with '^' for yad | |
| 48 | AL='' | |
| 49 | for i in `seq 0 50` | |
| 50 | do | |
| 51 | if [ ${ALGOS[$i]} != ' ' ]
| |
| 52 | then | |
| 53 | a=${ALGOS[$i]}
| |
| 54 | if [ "$DEF_ALGO" == $a ] | |
| 55 | then | |
| 56 | a="^$a" | |
| 57 | fi | |
| 58 | AL="$a $AL" | |
| 59 | else | |
| 60 | break | |
| 61 | fi | |
| 62 | done | |
| 63 | ||
| 64 | # find the default hash and mark it with '^' | |
| 65 | # for yad | |
| 66 | HS='' | |
| 67 | for i in `seq 0 50` | |
| 68 | do | |
| 69 | if [ ${HASHES[$i]} != ' ' ]
| |
| 70 | then | |
| 71 | h=${HASHES[$i]}
| |
| 72 | if [ "sha256" == $h ] | |
| 73 | then | |
| 74 | h="^$h" | |
| 75 | fi | |
| 76 | HS="$h $HS" | |
| 77 | else | |
| 78 | break | |
| 79 | fi | |
| 80 | done | |
| 81 | - | FILES=($(yad --title "$ACTION" --image="/usr/share/pixmaps/decrypt.png" --window-icon="/usr/share/pixmaps/decrypt.png" --form --separator=' ' --field="File to $ACTION":FL " " --field="Key file":FL ' ' --field="Algorithm":CB "$AL" --field="Mode":CB "$MODES" --field="Hash":CB "$HS" --item-separator=' ' )) |
| 81 | + | |
| 82 | # call yad and present the user-interface | |
| 83 | FILES=($(yad --title "$ACTION" --image="$ICON" --window-icon="$ICON" --form --separator=' ' --field="File to $ACTION":FL " " --field="Key file":FL ' ' --field="Algorithm":CB "$AL" --field="Mode":CB "$MODES" --field="Hash":CB "$HS" --item-separator=' ' )) | |
| 84 | ||
| 85 | # extrct the user-provided values | |
| 86 | FILE=${FILES[0]}
| |
| 87 | KFILE=${FILES[1]}
| |
| 88 | ALGO=${FILES[2]}
| |
| 89 | MODE=${FILES[3]}
| |
| 90 | HASH=${FILES[4]}
| |
| 91 | ||
| 92 | # verifications and error-handling | |
| 93 | if [ ! -e "$FILE" ] | |
| 94 | then | |
| 95 | yad --image "dialog-error" --title "ERROR" --text="File $FILE does not exist" | |
| 96 | exit 1 | |
| 97 | fi | |
| 98 | ||
| 99 | if [ ! -f "$FILE" ] | |
| 100 | then | |
| 101 | yad --image "dialog-error" --title "ERROR" --text="$FILE is not a valid file for $ACTIONion! Aborting." | |
| 102 | exit 0 | |
| 103 | fi | |
| 104 | ||
| 105 | if [ ! -e "$KFILE" ] | |
| 106 | then | |
| 107 | yad --image "dialog-error" --title "ERROR" --text="Key-file $KFILE does not exist" | |
| 108 | exit 1 | |
| 109 | fi | |
| 110 | ||
| 111 | if [ ! -f "$KFILE" ] | |
| 112 | then | |
| 113 | yad --image "dialog-error" --title "ERROR" --text="$KFILE is not a valid key-file! Aborting." | |
| 114 | exit 0 | |
| 115 | fi | |
| 116 | ||
| 117 | # Do it. | |
| 118 | # Remove pre-existing files if we are about to replace them anyway. | |
| 119 | ||
| 120 | if [ "encrypt" == "$ACTION" ] | |
| 121 | then | |
| 122 | if [ -e "$FILE".nc ] | |
| 123 | then | |
| 124 | rm -f "$FILE".nc | |
| 125 | fi | |
| 126 | ||
| 127 | mcrypt -a "$ALGO" -h "$HASH" -m "$MODE" -f "$KFILE" "$FILE" | |
| 128 | ||
| 129 | if [ -e "$FILE".nc ] | |
| 130 | then | |
| 131 | yad --image "dialog-information" --title "result" --text="encrypted file $FILE.nc has been written" | |
| 132 | else | |
| 133 | yad --image "dialog-warning" --title "result" --text="An error occured, check console-output" | |
| 134 | fi | |
| 135 | elif [ "decrypt" == "$ACTION" ] | |
| 136 | then | |
| 137 | dir=`dirname $FILE` | |
| 138 | out=$dir/`basename "$FILE" .nc` | |
| 139 | ||
| 140 | if [ -e "$out" ] | |
| 141 | then | |
| 142 | rm -f "$out" | |
| 143 | fi | |
| 144 | mdecrypt -a "$ALGO" -h "$HASH" -m "$MODE" -f "$KFILE" "$FILE" | |
| 145 | ||
| 146 | if [ -e "$out" ] | |
| 147 | then | |
| 148 | yad --image "dialog-information" --title "result" --text="File $out has been written" | |
| 149 | fi | |
| 150 | fi | |
| 151 | ||
| 152 | # EOF |
