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Fix dig idna test on Debian 10 "buster"

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The test expected `xn--ah-` to be treated as a syntax error (punycode
requires letters after the last hyphen) but libidn2 on buster
converted the label to `ah` instead. To avoid this bug, change the
invalid label to `xn--0000h` which translates to an out-of-range
unicode codepoint (beyond the maximum value) which is corectly
trated as invalid in older libidn2.
This commit is contained in:
Tony Finch 2022-09-13 17:17:55 +01:00
parent 83f27b6f3b
commit 5c1aed2881
1 changed files with 9 additions and 9 deletions
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18
bin/tests/system/idna/tests.sh
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@ -282,17 +282,17 @@ idna_enabled_test() {
idna_test "$text" "+idn" "xn--xx" "xn--xx."
# Fake A-label - the string does not translate to anything.
# This name is a syntax error: IDNA expects be punycode-encoded
# non-ascii characters after the last hyphen, but they are missing
# in this test.
# "xn--0000h" decodes to a single "code point" value of U+127252
# (1,208,914) which is not a legal Unicode code point.
# (https://www.farsightsecurity.com/blog/txt-record/punycode-20180711/)
text="Checking fake A-label"
idna_test "$text" "+noidn" "xn--ah-" "xn--ah-."
idna_test "$text" "+noidnin +noidnout" "xn--ah-" "xn--ah-."
idna_test "$text" "+noidnin +idnout" "xn--ah-" "xn--ah-."
idna_test "$text" "+idnin +noidnout" "xn--ah-" "xn--ah-."
idna_test "$text" "+idnin +idnout" "xn--ah-" "xn--ah-."
idna_test "$text" "+idn" "xn--ah-" "xn--ah-."
idna_test "$text" "+noidn" "xn--0000h" "xn--0000h."
idna_test "$text" "+noidnin +noidnout" "xn--0000h" "xn--0000h."
idna_test "$text" "+noidnin +idnout" "xn--0000h" "xn--0000h."
idna_test "$text" "+idnin +noidnout" "xn--0000h" "xn--0000h."
idna_test "$text" "+idnin +idnout" "xn--0000h" "xn--0000h."
idna_test "$text" "+idn" "xn--0000h" "xn--0000h."
# Too long a label. The punycode string is too long (at 64 characters).
# BIND rejects such labels: with +idnin