Exim version 4.95 #5 (FreeBSD 12.3) built 18-Oct-2022 13:42:33
Copyright (c) University of Cambridge, 1995 - 2018
(c) The Exim Maintainers and contributors in ACKNOWLEDGMENTS file, 2007
- 2020
Probably Berkeley DB version 1.8x (native mode)
Support for: crypteq iconv() use_setclassresources Expand_dlfunc OpenSSL
TLS_resume Content_Scanning DKIM DMARC PIPE_CONNECT
Experimental_Queue_Ramp SPF SRS TCP_Fast_Open Experimental_ARC
Lookups (built-in): lsearch wildlsearch nwildlsearch iplsearch cdb dbm
dbmjz dbmnz dnsdb dsearch ldap ldapdn ldapm mysql passwd
Authenticators: plaintext
Routers: accept dnslookup ipliteral manualroute queryprogram redirect
Transports: appendfile/mbx autoreply pipe smtp
In exim config:
warn condition = ${if def:mime_filename}
logwrite = TEST: $mime_filename
With this mime part (utf-8) all ok:
--------------hJ1w4fdd7nJgV1TgS95Plkir
Content-Type: text/plain; charset=UTF-8;
name="=?UTF-8?B?0L/QtdGA0LXQstGW0YDQutCw0ZfSkS50eHQ=?="
Content-Disposition: attachment;
filename*0*=UTF-8''%D0%BF%D0%B5%D1%80%D0%B5%D0%B2%D1%96%D1%80%D0%BA%D0%B0;
filename*1*=%D1%97%D2%91%2E%74%78%74
Content-Transfer-Encoding: base64
ZGdkZmdkZg==
--------------hJ1w4fdd7nJgV1TgS95Plkir--
Exim running with debug:
------------pBj0VVcSTH1a84AUmONrMFYf
13:45:06 71378 MIME: found content-type: header, value is 'text/plain'
13:45:06 71378 MIME: considering paramlist
'charset=UTF-8;name="=?UTF-8?B?0L/QtdGA0LXQstGW0YDQutCw0ZfSkS50eHQ=?=";'
13:45:06 71378 MIME: found charset= parameter in content-type: header,
value 'UTF-8'
13:45:06 71378 MIME: considering paramlist
'name="=?UTF-8?B?0L/QtdGA0LXQstGW0YDQutCw0ZfSkS50eHQ=?=";'
13:45:06 71378 MIME: found name= parameter in content-type: header,
value 'перевіркаїґ.txt'
13:45:06 71378 MIME: found content-disposition: header, value is
'attachment'
13:45:06 71378 MIME: considering paramlist
'filename*0*=UTF-8''%D0%BF%D0%B5%D1%80%D0%B5%D0%B2%D1%96%D1%80%D0%BA%D0%B0;filename*1*=%D1%97%D2%91%2E%74%78%74;'
13:45:06 71378 MIME: considering paramlist
'filename*1*=%D1%97%D2%91%2E%74%78%74;'
13:45:06 71378 MIME: found filename parameter in content-disposition:
header, value is 'перевіркаїґ.txt'
13:45:06 71378 MIME: found content-transfer-encoding: header, value is
'base64'
13:45:06 71378 using ACL "acl_check_mime"
13:45:06 71378 processing "warn" (/usr/local/etc/exim/configure 358)
13:45:06 71378 check decode = default
13:45:06 71378 warn: condition test succeeded in ACL "acl_check_mime"
13:45:06 71378 processing "warn" (/usr/local/etc/exim/configure 362)
13:45:06 71378 ╭considering: ${if def:mime_filename}
13:45:06 71378 ├──condition: def:mime_filename
13:45:06 71378 ├─────result: true
13:45:06 71378 ├──expanding: ${if def:mime_filename}
13:45:06 71378 ╰─────result: true
13:45:06 71378 check condition = ${if def:mime_filename}
13:45:06 71378 = true
13:45:06 71378 ╭considering: TEST: $mime_filename
13:45:06 71378 ├──expanding: TEST: $mime_filename
13:45:06 71378 ╰─────result: TEST: перевіркаїґ.txt
13:45:06 71378 ╰──(tainted)
13:45:06 71378 check logwrite = TEST: $mime_filename
13:45:06 71378 = TEST: перевіркаїґ.txt
13:45:06 71378 LOG: MAIN
13:45:06 71378 TEST: перевіркаїґ.txt
Have a problem with this MIME part (windows-1251):
------------0D414212928A8F055
Content-Type: text/plain; charset=windows-1251
Content-Transfer-Encoding: quoted-printable
=EF=E5=F0=E5=E2=B3=F0=EA=E0
------------0D414212928A8F055
Content-Type: TEXT/PLAIN;
name="=?windows-1251?Q?=EF=E5=F0=E5=E2=B3=F0=EA=E0=BF=B4=2Etxt?="
Content-transfer-encoding: base64
Content-Disposition: attachment;
filename="=?windows-1251?Q?=EF=E5=F0=E5=E2=B3=F0=EA=E0=BF=B4=2Etxt?="
ZGdkZmdkZg==
------------0D414212928A8F055--
Debug:
17:34:38 71940 MIME: Next part with boundary ----------0D414212928A8F055
17:34:38 71940 MIME: found content-type: header, value is 'text/plain'
17:34:38 71940 MIME: considering paramlist
'name="=?windows-1251?Q?=EF=E5=F0=E5=E2=B3=F0=EA=E0=BF=B4=2Etxt?=";'
17:34:38 71940 MIME: found name= parameter in content-type: header,
value '▒▒▒▒▒▒▒.txt'
17:34:38 71940 MIME: found content-transfer-encoding: header, value is
'base64'
17:34:38 71940 MIME: found content-disposition: header, value is
'attachment'
17:34:38 71940 MIME: considering paramlist
'filename="=?windows-1251?Q?=EF=E5=F0=E5=E2=B3=F0=EA=E0=BF=B4=2Etxt?=";'
17:34:38 71940 MIME: found filename= parameter in content-disposition:
header, value '▒▒▒▒▒▒▒.txt'
17:34:38 71940 MIME: found filename parameter in content-disposition:
header, value is '▒▒▒▒▒▒▒.txt'
17:34:38 71940 using ACL "acl_check_mime"
17:34:38 71940 processing "warn" (/usr/local/etc/exim/configure 362)
17:34:38 71940 ╭considering: ${if def:mime_filename}
17:34:38 71940 ├──condition: def:mime_filename
17:34:38 71940 ├─────result: true
17:34:38 71940 ├──expanding: ${if def:mime_filename}
17:34:38 71940 ╰─────result: true
17:34:38 71940 check condition = ${if def:mime_filename}
17:34:38 71940 = true
17:34:38 71940 ╭considering: TEST: $mime_filename
17:34:38 71940 ├──expanding: TEST: $mime_filename
17:34:38 71940 ╰─────result: TEST: ▒▒▒▒▒▒▒.txt
17:34:38 71940 ╰──(tainted)
17:34:38 71940 check logwrite = TEST: $mime_filename
17:34:38 71940 = TEST: ▒▒▒▒▒▒▒.txt
17:34:38 71940 LOG: MAIN
17:34:38 71940 TEST: ▒▒▒▒▒▒▒.txt
On 18.10.2022 16:42, Mikhail Golub via Exim-users wrote:
Developers, can you help me?
On 14.10.2022 18:03, Andrew C Aitchison wrote:
On Fri, 14 Oct 2022, Mikhail Golub via Exim-users wrote:
One more example.
In letter:
Content-Description: =?windows-1251?B?wvXu5F/C+/Xu5C54bHN4?=
In $mime_content_description:
=?windows-1251?b?wvxu5f/c+/xu5c54bhn4?=
Compare it:
=?windows-1251?B?wvXu5F/C+/Xu5C54bHN4?=
=?windows-1251?b?wvxu5f/c+/xu5c54bhn4?=
I have a script https://www.aitchison.me.uk/clearsubject.pl
piping the above though it gives:
----------------------------------
In letter:
Content-Description: Вход_Выход.xlsx
In $mime_content_description:
ВьnеяЬыьnеОxnш
Compare it:
Вход_Выход.xlsx
ВьnеяЬыьnеОxnш
----------------------------------
So $mime_content_description: has not preserved the case of the
encoded text,
which means that the decoded version is wrong !
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