Thanks for posting the code, it confirms GrandFather's suggestion; using my advice from here to use Devel::Peek to inspect $dec, it shows:

SV = PV(0x571d5fd57c40) at 0x560d5ed7d9a0
  REFCNT = 1
  FLAGS = (POK,IsCOW,pPOK)
  PV = 0x571d5fe15180 "QeTEv2804\0\0\0\0\0\0\0"\0
  CUR = 16
  LEN = 18
  COW_REFCNT = 0

[download]

As per the Crypt::Rijndael docs, the blocksize for Rijndael is 16 bytes.

In reply to Re^3: String differs from printing to STDOUT and printing to file by haukex
in thread String differs from printing to STDOUT and printing to file by cboesch

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