Hi I am having a problem sending encoded data via a form to a server that then decodes it.

I have a user string and a key that is XORed then encoded using base64.

I get the length of the string repeat the key to the same length and XOR the two, the length of the string adjusted key length and the resultant XOR are all the same length.

When I use base64 encoding and send that data there are additional characters appearing when the receiving server decodes the data.

Would someone please tell me where it all goes wrong and how to correct it.

my $user_string = "VendorTxCode=1298062774&Amount=43.01&Currency=GBP&D
+escription=Goods&SuccessURL=http://www.happy.com/success.html&Failure
+URL=http://www.unhappy.com/failure.html&BillingSurname=Bloggs&Billing
+Firstnames=Fred&BillingAddress1=30 Peyton Place&BillingCity=Somewhere
+&BillingPostCode=AB1 2CD&BillingCountry=UK&DeliverySurname=Bloggs&Del
+iveryFirstnames=Bill&DeliveryAddress1=30 Peyton Place&DeliveryCity=So
+mewhere&DeliveryPostCode=AB1 2CD&DeliveryCountry=UK";

my $key = "TuDQUBZVA4kPfeM7";

my $size = length($user_string);
my $encode = $key x $size;

my $portion = substr($encode, 0, $size); 

my $result = $user_string ^ $portion;


my $base_encoded = encode_base64($result,'');
my $base_key = encode_base64($key,'');

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In reply to Base64 Encoding by mikemc24

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