[jira] Commented: (CODEC-91) Handling of embedded padding in base64 encoded data changed in 1.4

["Gary Gregory (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CODEC-91?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12781278#action_12781278 ] 

Gary Gregory commented on CODEC-91:
-----------------------------------

The old behavior was a bug I think. 

>From the spec http://tools.ietf.org/html/rfc2045#section-6.8:
{quote}
Because it is used only for padding at the end of the data, the
   occurrence of any "=" characters may be taken as evidence that the
   end of the data has been reached (without truncation in transit).
{quote}

> Handling of embedded padding in base64 encoded data changed in 1.4
> ------------------------------------------------------------------
>
>                 Key: CODEC-91
>                 URL: https://issues.apache.org/jira/browse/CODEC-91
>             Project: Commons Codec
>          Issue Type: Bug
>    Affects Versions: 1.4
>            Reporter: Chris Pimlott
>
> 1.4 changed the way that embedded padding characters (i.e. "=") were handled when decoding base64 data.  Previously, the decoder ignored them and decoded all the data.  Now it stops upon encountering the first padding byte.  This breaks compatibility with previous versions.
> For example, in 1.4,
> b64.decode("Y29tbW9ucwo=".getBytes());
> gives the same result as
> b64.decode("Y29tbW9ucwo=Y29tbW9ucwo=".getBytes());

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