Contributing to 8259896: Base64 MIME decoder should allow unrecognised characters within padding

[Raffaello Giulietti]

Hello,

I can contribute in solving the issue [1] mentioned in [2].

But before investing time, I just want to make sure that there is some 
consensus that it needs to be solved in the first place. Maybe there are 
diverging opinions that consider the current behavior as correct.


Greetings
Raffaello

----

[1] https://bugs.openjdk.java.net/browse/JDK-8259896
[2] 
https://mail.openjdk.java.net/pipermail/core-libs-dev/2021-February/074407.html


> Hello Raffaello,
> 
> I have added this comment from you, to that JDK-8259896 issue.
> 
> -Jaikiran
> 
> On 02/02/21 12:43 am, Raffaello Giulietti wrote:
>> Hi,
>>
>> in my opinion, the reporter of [1] is right in requiring that 
>> extraneous characters be discarded, even inside the padding.
>>
>> Indeed, the first full paragraph on [2] reads:
>>
>> "Any characters outside of the base64 alphabet are to be ignored in
>> base64-encoded data."
>>
>> where "the base64 alphabet" also includes the padding character '=' 
>> and "base64-encoded data" extends to padding as well, because padding 
>> is an essential part of encoding.
>>
>> The legitimate doubt expressed in comment [3] should thus be solved in 
>> favor of a bug fix.
>>
>>
>> My 2 cents
>> Greetings
>> Raffaello
>>
>> ----
>>
>> [1] https://bugs.openjdk.java.net/browse/JDK-8259896
>> [2] https://tools.ietf.org/html/rfc2045#page-26
>> [3] 
>> https://bugs.openjdk.java.net/browse/JDK-8259896?focusedCommentId=14395485&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14395485
>>
>