Initial set of IDNA tests.
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Stephen Morris
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bin/tests/system/idna/tests.sh
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248
bin/tests/system/idna/tests.sh
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# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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#
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#
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# See the COPYRIGHT file distributed with this work for additional
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# information regarding copyright ownership.
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SYSTEMTESTTOP=..
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. $SYSTEMTESTTOP/conf.sh
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# This set of tests check the behavior of the IDNA options in "dig".
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#
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# "dig" supports two IDNA-related options:
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#
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# +[no]idnin - Translates a domain name into punycode format before sending
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# the query to the server.
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# +[no]idnout - Translates the received punycode domain names into appropriate
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# unicode characters before displaying.
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#
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# The tests run "dig" against an authoritative server configured with a minimal
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# root zone and nothing else. As a result, all queries will result in an
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# NXDOMAIN. The server will return the qname sent, which "dig" will display
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# according to the options selected. This returned string is compared with
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# the qname originally sent.
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#
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# In the comments below, the following nomenclature (taken from RFC 5890) is
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# used:
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#
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# A-label: Label comprising ASCII characters that starts xn-- and whose
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# characters after the xn-- are a valid output of the Punycode
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# algorithm.
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#
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# Fake A-label: An A-label whose characters after the xn-- are not valid
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# Punycode output.
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#
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# U-label: Unicode (native character) form of a label.
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#
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# For the purpose of this test script, U-labels do not include labels that
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# comprise purely ASCII characters, which are referred to as "ASCII-labels"
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# here. Valid ASCII-labels comprise letters, digits and hyphens and do not
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# start with a hyphen.
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#
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# References:
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# 1. http://www.unicode.org/reports/tr46/#Deviations
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# 2. http://www.unicode.org/reports/tr46/#IDNAComparison
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# Using dig insecure mode as we are not testing DNSSEC here
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DIGCMD="$DIG -i -p ${PORT} @10.53.0.1"
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# Initialize test count and status return
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n=0
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status=0
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# Function for extracting the question name reported by "dig".
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#
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# This is the first field after the line starting ";; QUESTION SECTION:".
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# The string returned includes the trailing period.
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qname() {
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awk 'BEGIN { qs = 0; } \
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/;; QUESTION SECTION:/ { qs = 1; next; } \
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qs == 1 {sub(";", "", $1) ; print $1; exit 0; }' \
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$1
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}
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# Function for performing the test where "dig" is expected to succeed.
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#
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# $1 - Description of the test
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# $2 - Dig command additional options
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# $3 - Name being queried
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# $4 - The name that should be displayed by "dig". Note that names displayed
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# by "dig" will always have a trailing period, so this parameter should
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# have that period as well.
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idna_test() {
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n=`expr $n + 1`
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description=$1
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if [ "$2" != "" ]; then
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description="${description}: $2"
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fi
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echo_i "$description ($n)"
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ret=0
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$DIGCMD $2 $3 > dig.out.$n 2>&1
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if [ $? -ne 0 ]; then
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echo_i "failed: dig returned error status $?"
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ret=1
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else
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actual=`qname dig.out.$n`
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if [ "$4" != "$actual" ]; then
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echo_i "failed: expected answer $4, actual result $actual"
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ret=1
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fi
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fi
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status=`expr $status + $ret`
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}
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# Function for performing test where "dig" is expected to fail
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#
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# $1 - $3: As for idna_test function
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idna_fail() {
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n=`expr $n + 1`
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description=$1
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if [ "$2" != "" ]; then
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description="${description}: $2"
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fi
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echo_i "$description ($n)"
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ret=0
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$DIGCMD $2 $3 > dig.out.$n 2>&1
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if [ $? -eq 0 ]; then
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echo_i "failed: dig command unexpectedly succeeded"
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ret=1
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fi
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status=`expr $status + $ret`
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}
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# Tests of valid ASCII-label.
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#
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# +noidnin: The label is sent unchanged to the server.
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# +idnin: The label is lower-cased and sent to the server.
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#
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# The +[no]idnout flag has no effect on the result.
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text="Checking valid ASCII label"
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idna_test "$text" "" LocalhosT localhost.
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idna_test "$text" "+noidnin +noidnout" LocalhosT LocalhosT.
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idna_test "$text" "+noidnin +idnout" LocalhosT LocalhosT.
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idna_test "$text" "+idnin +noidnout" LocalhosT localhost.
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idna_test "$text" "+idnin +idnout" LocalhosT localhost.
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# Tests of a valid U-label.
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#
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# +noidnin +noidnout: The label is sent as a unicode octet stream and dig will
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# display the string in the \nnn format.
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# +noidnin +idnout: As for the previous case.
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# +idnin +noidnout: The label is converted to the xn-- format. "dig"
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# displays the returned xn-- text.
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# +idnin +idnout: The label is converted to the xn-- format. "dig"
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# converts the returned xn-- string back to the original
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# unicode text.
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#
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# Note that ASCII characters are converted to lower-case.
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text="Checking valid non-ASCII label"
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idna_test "$text" "" "München" "münchen."
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idna_test "$text" "+noidnin +noidnout" "München" "M\195\188nchen."
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idna_test "$text" "+noidnin +idnout" "München" "M\195\188nchen."
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idna_test "$text" "+idnin +noidnout" "München" "xn--mnchen-3ya."
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idna_test "$text" "+idnin +idnout" "München" "münchen."
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# Tests of transitional processing of a valid U-label
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#
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# IDNA2003 introduced national character sets but, unfortunately, didn't
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# support several characters properly. One of those was the German character
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# "ß" (the "Eszett" or "sharp s"), which was interpreted as "ss". So the
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# domain “faß.de” domain (for example) was processed as “fass.de”.
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#
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# This was corrected in IDNA2008, although some vendors that adopted this
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# standard chose to keep the existing IDNA2003 translation for this character
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# to prevent problems (e.g. people visiting www.faß.example would, under
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# IDNA2003, go to www.fass.example but under IDNA2008 would end up at
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# www.fa\195\159.example - a different web site).
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#
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# BIND has adopted a hard transition, so this test checks that the transitional
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# mapping is not used. The tests are essentially the same as for the valid
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# U-label.
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text="Checking that non-transitional IDNA processing is used"
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idna_test "$text" "" "faß.de" "faß.de."
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idna_test "$text" "+noidnin +noidnout" "faß.de" "fa\195\159.de."
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idna_test "$text" "+noidnin +idnout" "faß.de" "fa\195\159.de."
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idna_test "$text" "+idnin +noidnout" "faß.de" "xn--fa-hia.de."
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idna_test "$text" "+idnin +idnout" "faß.de" "faß.de."
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# Another problem character. The final character in the first label mapped
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# onto the Greek sigma character ("σ") in IDNA2003.
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text="Second check that non-transitional IDNA processing is used"
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idna_test "$text" "" "βόλος.com" "βόλος.com."
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idna_test "$text" "+noidnin +noidnout" "βόλος.com" "\206\178\207\140\206\187\206\191\207\130.com."
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idna_test "$text" "+noidnin +idnout" "βόλος.com" "\206\178\207\140\206\187\206\191\207\130.com."
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idna_test "$text" "+idnin +noidnout" "βόλος.com" "xn--nxasmm1c.com."
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idna_test "$text" "+idnin +idnout" "βόλος.com" "βόλος.com."
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# Tests of a valid A-label (i.e. starting xn--)
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#
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# +noidnout: The string is sent as-is to the server and the returned qname is
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# displayed in the same form.
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# +idnout: The string is sent as-is to the server and the returned qname is
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# displayed as the corresponding U-label.
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#
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# The "+[no]idnin" flag has no effect in these cases.
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text="Checking valid A-label"
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idna_test "$text" "" "xn--nxasmq6b.com" "βόλοσ.com."
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idna_test "$text" "+noidnin +noidnout" "xn--nxasmq6b.com" "xn--nxasmq6b.com."
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idna_test "$text" "+noidnin +idnout" "xn--nxasmq6b.com" "βόλοσ.com."
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idna_test "$text" "+idnin +noidnout" "xn--nxasmq6b.com" "xn--nxasmq6b.com."
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idna_test "$text" "+idnin +idnout" "xn--nxasmq6b.com" "βόλοσ.com." A
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# Tests of a fake A-label
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#
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# +noidnin: The label is sent as-is to the server and dig will display the
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# returned fake A-label in the same form.
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# +idnin: "dig" should report that the label is not correct.
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#
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# The +[no]idnout options should not have any effect on the test.
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text="Checking invalid A-label"
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idna_fail "$text" "" "xn--ahahah"
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idna_test "$text" "+noidnin +noidnout" "xn--ahahah" "xn--ahahah."
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idna_test "$text" "+noidnin +idnout" "xn--ahahah" "xn--ahahah."
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idna_fail "$text" "+idnin +noidnout" "xn--ahahah"
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idna_fail "$text" "+idnin +idnout" "xn--ahahah"
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# Tests of a valid unicode string but an invalid U-label
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#
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# Symbols are not valid IDNA names.
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#
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# +noidnin: "dig" should send unicode octets to the server and display the
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# returned qname in the same form.
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# +idnin: "dig" should generate an error.
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#
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# The +[no]idnout options should not have any effect on the test.
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text="Checking invalid U-label"
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idna_fail "$text" "" "❤︎.com"
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idna_test "$text" "+noidnin +noidnout" "❤︎.com" "\226\157\164\239\184\142.com."
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idna_test "$text" "+noidnin +idnout" "❤︎.com" "\226\157\164\239\184\142.com."
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idna_fail "$text" "+idnin +noidnout" "❤︎.com"
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idna_fail "$text" "+idnin +idnout" "❤︎.com"
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exit $status
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