From: mattiase@acm.org
To: 52670@debbugs.gnu.org
Subject: bug#52670: legacy base64 encoding of latin-1
Date: Sun, 19 Dec 2021 22:47:15 +0100 [thread overview]
Message-ID: <7AAE6196-B9B9-4367-87EC-80DD6304CBCE@acm.org> (raw)
For what appears to be historical reasons, the base64 encoding functions (base64-encode-string etc) treat characters in the range U+0080..U+00FF as if they were raw bytes in the 127..255 range. This means that
(base64-encode-string "ÿ")
and
(base64-encode-string "\xff")
return the same result although the strings are completely different. Attempts to encode other multibyte characters fail (correctly). For example,
(base64-encode-string "Ÿ")
signals an error, as expected.
I propose we tighten up the behavior by eliminating the legacy handling of characters in the U+0080..U+00FF range. Letting the bug stay in place enables incorrect, brittle and error-prone usage: the functions are clearly intended to be fed encoded text only and should signal an error when not, as stated in the manual.
next reply other threads:[~2021-12-19 21:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-19 21:47 mattiase [this message]
2021-12-20 17:26 ` bug#52670: [PATCH] legacy base64 encoding of latin-1 mattiase
2021-12-20 19:10 ` Eli Zaretskii
2021-12-20 19:24 ` Mattias Engdegård
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