crypt.raw.sh

# Copyright 2015-2023 Rivoreo

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# of this software and associated documentation files (the "Software"), to
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# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# SOFTWARE.


get_encrypted_byte_count() {
	[ -f "$1" ] || return
	value="`wc -c < \"$1\" 2> /dev/null`"
}

_encrypt_history() {
	hexdump -v -e '1/1 "%02x\n"' | xtea_ctr_crypt "$1" %03o\\n $2 $3 | while read -r n; do printf "\\$n"; done
}

_decrypt_history() {
	hexdump -v -e '1/1 "%02x\n"' | xtea_ctr_crypt "$1" %03o\\n 0 | while read -r n; do printf "\\$n"; done
}