Android can't decode PHP base64 code

Question

I'm trying to decode my Base64 code that encoded by my PHP server, It's work and will be decoded with PHP normally but when I trying to encode it through my Android phone I got the following error:

Base64DecoderException: encoded value has invalid trailing byte

My Base64 Code:

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

Any ideas?

Well that's your base64 data - now how are you transferring it to the phone, and what does your Java code look like? — Jon Skeet
– Jon Skeet, Commented Sep 10, 2013 at 21:19
I'll bet my bottom dollar that the 'invalid trailing byte' is a \n. post your code. — Sammitch
– Sammitch, Commented Sep 10, 2013 at 21:23
What exactly is in that base64 string? When I copy/pasted it into 3 different decoders online I get gibberish back. — Jonathan Kuhn
– Jonathan Kuhn, Commented Sep 10, 2013 at 21:26
@JonathanKuhn That's because it's AES encrypted bytes, check my updated questions please. — iSun
– iSun, Commented Sep 10, 2013 at 21:34
I'm sure all your encryption/encoding is fine, it's the actual output of the data that's where the problem likely lies. See @jay-sheth's answer below, and try a simple s.trim() on the input in your Java code to remove any offending whitespace. — Sammitch
– Sammitch, Commented Sep 10, 2013 at 21:48

Jay Sheth · Accepted Answer · 2013-09-10 21:39:50Z

4

if the invalid trailing byte is a carriage return (\n), the easiest solution would be to leave out the closing PHP tag (on all of your PHP files):

<?php
//Code goes here
//Leave out the closing tag: ?>

Otherwise, you may be able to trim surrounding whitespace and carriage returns (in your Java code), before you base64 decode it.

answered Sep 10, 2013 at 21:39

Jay Sheth

1,81817 silver badges15 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Achille Over a year ago

\n isn't the carriage return character. \r is the carriage return character. \n is the line feed character. stackoverflow.com/questions/3091524/…

Collectives™ on Stack Overflow

Android can't decode PHP base64 code

1 Answer 1

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related