Note that you can open a file with CRLF line endings for reading with the :crlf IO layer. chomp will then remove both line ending characters.

johngg@shiraz:~/perl/Monks$ perl -Mstrict -Mwarnings -MData::Dumper -E
+ '
my $fileStr = qq{val1=key1\r\nval2=key2\r\nval3=key3\r\n};
open my $inFH, q{<:crlf}, \ $fileStr or die $!;
my %hash;
while ( <$inFH> )
{
    chomp;
    my( $v, $k ) = split m{=};
    $hash{ $k }  = $v;
}
close $inFH or die $!;
print Data::Dumper
   ->new( [ \ %hash ], [ qw{ *hash } ] )
   ->Sortkeys( 1 )
   ->Dumpxs();'
%hash = (
          'key1' => 'val1',
          'key2' => 'val2',
          'key3' => 'val3'
        );
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I hope this is helpful.