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NYX-CARDCRYPTO(1) User Contributed Perl Documentation NYX-CARDCRYPTO(1)
NAME
nyx-cardcrypto - Uses Rijndael algoritm to encrypt or decrypt data
SYNOPSIS
nyx-cardcrypto [-h] -e|-d [-n|-b|-H] [-k <64 char hex key>] <data>
DESCRIPTION
Uses Rijndael algoritm to encrypt or decrypt data.
-h short help
-e encrypt mode
-d decrypt mode
-k key key (nyx uses a 256bit key that hex encoded is 64 characters wide)
default: 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef
input format when encoding: default: "as is"
-b base64 encoded
-H hexencoded
output format when decoding: default: "as is" + newline
-n supress newline
-b base64 encoded
-H hexencoded
Last argument is the data top operate on. Please use single quotes from shell.
EXAMPLES
$ nyx-cardcrypto -e \
-k 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef \
'hej'
2da1616b440605837ac9c6499611cb85a2c742913717bff8f921dd8638145c71
$ nyx-cardcrypto -d \
-k 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef \
2da1616b440605837ac9c6499611cb85a2c742913717bff8f921dd8638145c71
hej
NOTICE
Rijndael is a block cipher which means that the the input plaintext
when encrypting data needs to be padded to enen block limits. Block
size is 256 bits (32 ascii characters). Data is padded with '\0' and
these could be seen when decryptig data.
$ nyx-cardcrypto -d -n \
-k 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef \
2da1616b440605837ac9c6499611cb85a2c742913717bff8f921dd8638145c71 \
| od -tx1c
0000000 68 65 6a 00 00 00 00 00 00 00 00 00 00 00 00 00
h e j \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
0000020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
\0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0
0000040
or
$ nyx-cardcrypto -d -H \
-k 0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef \
2da1616b440605837ac9c6499611cb85a2c742913717bff8f921dd8638145c71 \
68656a0000000000000000000000000000000000000000000000000000000000
SEE ALSO
nyx(1)
perl v5.10.0 2011-03-06 NYX-CARDCRYPTO(1)
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