My guess is that you're getting bitten by not setting the binary mode on the filehandle you're reading from. This is done easiest by using the binmode function:

binmode STDIN;
$md5->addfile(\*STDIN);

[download]

Another possibility might be that the "echo" program is not outputting what you expect - maybe it is adding some whitespace like newlines even though you told it not to - that would be another thing to check.

In reply to Re: Newbie doesn't understand Digest::MD5 by Corion
in thread Newbie doesn't understand Digest::MD5 by eltorio

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