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From "Gary Gregory (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CODEC-91) Handling of embedded padding in base64 encoded data changed in 1.4
Date Wed, 02 Jun 2010 02:31:39 GMT

    [ https://issues.apache.org/jira/browse/CODEC-91?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12874386#action_12874386
] 

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

On a different tack, I think we should offer an argument to decide if you want to follow the
specification WRT "Padding at the end of the data is performed using the "=" character." This
would have to be a new API obviously. The default is TDB: should it be the [codec] 1.3 or
1.4 behavior.

> 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
>         Attachments: codec-91-actually-works-and-tests-yay.patch
>
>
> 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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