so I tried to unpack ("H*")

try 

$str = join '', map { chr } unpack( "(H2)*", $str );

[download]

update: or, shorter

$str = pack "C*", unpack "(H2)*", $str;

[download]

In reply to Re: about crypt/decrypt strings with Rijndael by shmem
in thread about crypt/decrypt strings with Rijndael by Discipulus

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