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On 2023-09-03 at 08:26
hongy...@gmail.com wrote:
> I want to split a hex string into bytes and compute their xor, as shown below:
>
> werner@X10DAi:~$ data=$( sed `s/\\(..\\)/\\1 /g` <<<
23230DFE4C5336413245313636504135303333333401000A130A1814300A01010101 | sed -e `s/[ ]*$//` )
> werner@X10DAi:~$ IFS=` ` read -ra ADDR <<< "$data"; xor=0; for i
in "${ADDR[@]}"; do xor=$((xor ^ 0x$i)); done; printf `%x
` $xor
> ea
>
> I wonder if there is a more concise and simple method for this purpose.
E.g.:
DATA=23230DFE4C5336413245313636504135303333333401000A130A1814300A01010101
XOR=0
while read -N2 BYTE; do ((XOR^=0x$BYTE)) ; done < <(echo $DATA)
printf `%02X
` $XOR
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