Gilles Peskine d11bb47fe0 Reject invalid UTF-8 and weird characters in text files ...

Reject "weird" characters in text files, especially control characters that
might be escape sequences or that might cause other text to appear garbled
(as in https://trojansource.codes/).

Also reject byte sequences that aren't valid UTF-8.

Accept only ASCII (except most control characters), letters, some non-ASCII
punctuation and some mathematical and technical symbols. This covers
everything that's currently present in Mbed TLS ( §áèéëñóöüłŽ–—’“”…≥).

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>

2023-01-05 20:31:14 +01:00

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