diff options
| author | Đoàn Trần Công Danh <congdanhqx@gmail.com> | 2021-05-09 20:12:10 +0300 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2021-05-10 09:06:22 +0300 |
| commit | 0b689562cafc05b1a36bdea3d025c9ecdf2514bd (patch) | |
| tree | a98d6735ed5e8c33dd10fee6d4c5c1de9a8b56db /t/t5100-mailinfo.sh | |
| parent | dd9323b7fbda92b988bbfe835fd75c179a3b4780 (diff) | |
mailinfo: warn if CRLF found in decoded base64/QP email
When SMTP servers receive 8-bit email messages, possibly with only
LF as line ending, some of them decide to change said LF to CRLF.
Some mailing list softwares, when receive 8-bit email messages,
decide to encode those messages in base64 or quoted-printable.
If an email is transfered through above mail servers, then distributed
by such mailing list softwares, the recipients will receive an email
contains a patch mungled with CRLF encoded inside another encoding.
Thus, such CR (in CRLF) couldn't be dropped by "mailsplit".
Hence, the mailed patch couldn't be applied cleanly.
Such accidents have been observed in the wild [1].
Instead of silently rejecting those messages, let's give our users
some warnings if such CR (as part of CRLF) is found.
[1]: https://nmbug.notmuchmail.org/nmweb/show/m2lf9ejegj.fsf%40guru.guru-group.fi
Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't/t5100-mailinfo.sh')
| -rwxr-xr-x | t/t5100-mailinfo.sh | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/t/t5100-mailinfo.sh b/t/t5100-mailinfo.sh index 147e616533..ac6fbfe596 100755 --- a/t/t5100-mailinfo.sh +++ b/t/t5100-mailinfo.sh @@ -228,4 +228,34 @@ test_expect_success 'mailinfo handles unusual header whitespace' ' test_cmp expect actual ' +check_quoted_cr_mail () { + mail="$1" && shift && + git mailinfo -u "$@" "$mail.msg" "$mail.patch" \ + <"$mail" >"$mail.info" 2>"$mail.err" && + test_cmp "$mail-expected.msg" "$mail.msg" && + test_cmp "$mail-expected.patch" "$mail.patch" && + test_cmp "$DATA/quoted-cr-info" "$mail.info" +} + +test_expect_success 'split base64 email with quoted-cr' ' + mkdir quoted-cr && + git mailsplit -oquoted-cr "$DATA/quoted-cr.mbox" >quoted-cr/last && + test $(cat quoted-cr/last) = 2 +' + +test_expect_success 'mailinfo warn CR in base64 encoded email' ' + sed -e "s/%%$//" -e "s/%%/$(printf \\015)/g" "$DATA/quoted-cr-msg" \ + >quoted-cr/0001-expected.msg && + sed "s/%%/$(printf \\015)/g" "$DATA/quoted-cr-msg" \ + >quoted-cr/0002-expected.msg && + sed -e "s/%%$//" -e "s/%%/$(printf \\015)/g" "$DATA/quoted-cr-patch" \ + >quoted-cr/0001-expected.patch && + sed "s/%%/$(printf \\015)/g" "$DATA/quoted-cr-patch" \ + >quoted-cr/0002-expected.patch && + check_quoted_cr_mail quoted-cr/0001 && + test_must_be_empty quoted-cr/0001.err && + check_quoted_cr_mail quoted-cr/0002 && + grep "quoted CRLF detected" quoted-cr/0002.err +' + test_done |