92 lines
2.2 KiB
Plaintext
92 lines
2.2 KiB
Plaintext
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#!/usr/bin/env bash
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#
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# gbc - generate a set of boardconfig files
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#
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# Copyright (C) 2011 Bart Van Der Meerssche <bart.vandermeerssche@flukso.net>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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BFLAG=
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SFLAG=
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MFLAG=
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CFALG=
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BATCH="FLxx"
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SERIAL=1
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MAC="0123456789abc"
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COUNT=0
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while getopts 'b:m:s:c:h' OPTION
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do
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case $OPTION in
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b) BFLAG=1
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BATCH="$OPTARG"
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;;
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s) SFLAG=1
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SERIAL="$OPTARG"
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;;
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m) MFLAG=1
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MAC="0x$OPTARG"
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;;
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c) CFLAG=1
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COUNT="$OPTARG"
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;;
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h|?) printf "Generate a set of boardconfig (bc) files.\n"
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printf "Usage: %s -b <batch> [-s <serial>] -m <mac_addr> -c <#bc's> <reference bc>\n" $(basename $0) >&2
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exit 1
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;;
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esac
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done
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shift $(($OPTIND - 1))
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printf "Creating target directory %s.\n" $BATCH
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mkdir $BATCH
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for ((i = 0; i < COUNT; i++))
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do
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FN=$(printf "$BATCH/$BATCH%06d" $((SERIAL + i)))
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printf "Cloning reference file to %s.\n" $FN
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cp $1 $FN
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ETH=$(echo 16o $((MAC + 2*i)) p | dc)
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WIFI=$(echo 16o $((MAC + 2*i+1)) p | dc)
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printf "Substituting eth/wifi macs for %s/%s.\n" $ETH $WIFI
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echo $ETH | xxd -r -p -s $((0x0060)) - $FN
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echo $WIFI | xxd -r -p -s $((0x0066)) - $FN
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printf "Writing 224 CSPRNG bytes to %s.\n" $FN
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hexdump -v -e '1/1 "%.2x"' -n 224 /dev/urandom | xxd -r -p -s $((0x1020)) - $FN
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done
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printf "Writing 32 TRNG bytes to each boardconfig file.\n"
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printf "Write speed depends on the entropy pool being filled by kernel events.\n"
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printf "So surf the web, click around, enter keystrokes...\n"
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for ((i = 0; i < COUNT; i++))
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do
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FN=$(printf "$BATCH/$BATCH%06d" $((SERIAL + i)))
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printf "Writing 32 TRNG bytes to %s.\n" $FN
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hexdump -v -e '1/1 "%.2x"' -n 32 /dev/random | xxd -r -p -s $((0x1000)) - $FN
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done
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