libgocryptfs/tests/len2elen.sh
2021-09-01 10:22:01 +02:00

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#!/bin/bash -eu
#
# Check plaintext file name length -> encrypted file name length relation
#
# Part of the gocryptfs test suite
# https://nuetzlich.net/gocryptfs/
NAME="x"
LEN=1
if [[ ! -f a/gocryptfs.conf ]] ; then
echo "fatal: must have gocryptfs dir 'a' mounted at 'b'"
exit 1
fi
if ! mountpoint b > /dev/null ; then
echo "fatal: must have gocryptfs dir 'a' mounted at 'b'"
exit 1
fi
rm -f b/*
while [[ $LEN -le 255 ]]; do
touch "b/$NAME" || break
ELEN=$(ls a | wc -L)
echo "$LEN $ELEN"
rm "b/$NAME"
NAME="${NAME}x"
LEN=${#NAME}
done