107 lines
2.5 KiB
Bash
Executable File
107 lines
2.5 KiB
Bash
Executable File
#!/bin/bash
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# Name: passphrase
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# Author: Nick Warzin <tapesonthefloor@gmail.com>
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# License: GNU GENERAL PUBLIC LICENSE
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# Description: Generates random phrases appropriate for memorable but secure passwords.
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SPACE='' # default to no spaces between words
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COUNT=1 # default to one group of passphrases
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WORDS=3 # default to three-word phrases
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DICT='/usr/share/dict/words' # standard location of the words file
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CLEANDICT="$(mktemp)" # create a temp file to store our sanitized dictionary
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PASSPHRASE=`grep "^[a-z]\{3,8\}$" $DICT` # sanitize the dictionary
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echo "$PASSPHRASE" >> $CLEANDICT # store the results in our temp file
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DICTCOUNT=`wc -l < $CLEANDICT` # grab dictionary line count
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echo ""
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while [[ $# > 0 ]]; do # iterate through arguments, one or two steps at a time
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key="$1" # argument key
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case $key in
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-s) # we want spaces b/w words
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SPACE=' '
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# since this option takes no value argument, we only want
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# to shift ahead one argument
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;;
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-c) # we want a certain number of groups
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COUNT="$2"
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# and since this does have a value, skip the value itself on
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# the next scan... we know it's not an argument key
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shift
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;;
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-w) # we are specifying a word count
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WORDS="$2"
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# skip the argument; see above
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shift
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;;
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*)
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# we were given an argument we don't understand or don't care
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# about. Let's just... ignore it completely, shall we?
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;;
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esac
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shift # shift ahead one (more) argument
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done
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if [ "$COUNT" -lt 1 ] || [ "$WORDS" -lt 1 ]; then
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echo -e "Don't be cheeky.\n"
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exit 1
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fi
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for (( y = 1; y <= $COUNT; y++ )); do
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for i in {1..5}; do
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for (( z = 1; z <= $WORDS; z++ )); do # give us WORDS words words
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THERAND=$(( ((RANDOM<<15)|RANDOM) % DICTCOUNT )) # generate a pseudorandom number beteween 1 and the word count
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printf `sed -n ''"$THERAND"' p' < $CLEANDICT`"$SPACE"
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done
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echo ''
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done
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echo ''
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done
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exit 1
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for (( z = 1; z <= $COUNT; z++ )); do # give us COUNT groupings of five passphrases
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for i in {1..5}; do
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PASSPHRASE=`grep "^[a-z]\{3,8\}$" /usr/share/dict/words | shuf -n$WORDS`
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# select all words from the standard linux words file with a length between
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# 3 and 8 characters. Give us some of those words at random.
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if [ "$SPACE" -eq 0 ]; then # if we want spaces stripped
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PASSPHRASE=`echo $PASSPHRASE | tr -d '[[:space:]]'` # trim all spaces
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fi
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echo $PASSPHRASE # dump result to screen
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done
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echo ""
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done
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