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copied!<p>Found the solution!!!</p> <p>In Perl, I had to add after the opening of the output file: </p> <blockquote> <p>binmode $ofh;</p> </blockquote> <p>The padding suggestion was helpful, but in the end I omitted the padding directive and used the default which is PKCS7 in Perl and in C#.</p> <p>My final Perl code looks like this:</p> <pre><code>use strict; use Crypt::CBC; my $ifh; my $ofh; my $cipher = Crypt::CBC->new( { 'key' => 'length16length16', 'cipher' => 'Rijndael', 'iv' => 'length16length16', 'literal_key' => 1, 'header' => 'none', 'keysize' => 128 / 8 } ); #open input and output file open($ifh,'<', $infile) or die "Can't open $infile for encryption input: $!\n"; open($ofh, '>', $outfile) or die "Can't open $outfile for encryption output: $!\n"; binmode &ofh; $cipher->start('encrypting'); #write encrypted data to output file while (read($ifh,my $buffer,1024)) { print $ofh $cipher->crypt($buffer); } print $ofh $cipher->finish; #close file handles close($ifh) or die "Error closing input file: $!\n"; close($ofh) or die "Error closing output file: $!\n"; </code></pre> <p>and the C# part:</p> <pre><code>RijndaelManaged myRijndael = new System.Security.Cryptography.RijndaelManaged(); myRijndael.Key = System.Text.Encoding.UTF8.GetBytes("length16length16"); myRijndael.IV = System.Text.Encoding.UTF8->GetBytes("length16length16"); myRijndael.Mode = CipherMode.CBC; // Create a decryptor to perform the stream transform. ICryptoTransform decryptor = myRijndael.CreateDecryptor(myRijndael.Key, myRijndael.IV); //Create the streams used for decryption. FileStream file = File.OpenRead(strInFile); CryptoStream csDecrypt = new CryptoStream(file, decryptor, CryptoStreamMode.Read); StreamReader srDecrypt = new StreamReader(csDecrypt); // Read the decrypted bytes from the decrypting stream string decryptedText = srDecrypt.ReadToEnd(); </code></pre>

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