[issue3169] email/header.py doesn't handle Base64 headers that have been insufficiently padded.

[Tony Nelson]

Tony Nelson <tony_nelson at users.sourceforge.net> added the comment:

Postel's law suggests that, as bad padding can be repaired,
decode_header ought to do so.  The patch does that, adds a test for it,
and alters another test to still properly fail on really bad encoded data.

The test doesn't check a single character encoded string, as such does
not specify a complete octet and I felt that base64 decoders might
reasonably differ on what to do then.

The issue exists in Python2.6.1 (where I made it) and trunk.

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keywords: +patch
nosy: +tony_nelson
Added file: http://bugs.python.org/file13589/header_B_padding.patch

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