From efce3ea5a85126d3e6c2084a7b581cc1df1b340b Mon Sep 17 00:00:00 2001 From: Steve Holme Date: Thu, 13 Feb 2020 22:56:51 +0000 Subject: smtp: Support the SMTPUTF8 extension in the VRFY command --- lib/smtp.c | 17 ++++++++++++++-- tests/data/Makefile.inc | 2 +- tests/data/test967 | 54 +++++++++++++++++++++++++++++++++++++++++++++++++ tests/data/test968 | 51 ++++++++++++++++++++++++++++++++++++++++++++++ tests/ftpserver.pl | 15 +++++++++----- 5 files changed, 131 insertions(+), 8 deletions(-) create mode 100644 tests/data/test967 create mode 100644 tests/data/test968 diff --git a/lib/smtp.c b/lib/smtp.c index ef51c829a..362e8eae9 100644 --- a/lib/smtp.c +++ b/lib/smtp.c @@ -491,6 +491,12 @@ static CURLcode smtp_perform_command(struct connectdata *conn) char *address = NULL; struct hostname host = { NULL, NULL, NULL, NULL }; + /* We notify the server we are sending UTF-8 data if a) it supports the + SMTPUTF8 extension and b) The mailbox contains UTF-8 charaacters, in + either the local address or host name parts. This is regardless of + whether the host name is encoded using IDN ACE */ + bool utf8 = FALSE; + /* Parse the mailbox to verify into the local address and host name parts, converting the host name to an IDN A-label if necessary */ result = smtp_parse_address(conn, smtp->rcpt->data, @@ -498,12 +504,19 @@ static CURLcode smtp_perform_command(struct connectdata *conn) if(result) return result; + /* Establish whether we should report SMTPUTF8 to the server for this + mailbox as per RFC-6531 sect. 3.1 point 6 */ + utf8 = (conn->proto.smtpc.utf8_supported) && + ((host.encalloc) || (!Curl_is_ASCII_name(address)) || + (!Curl_is_ASCII_name(host.name))); + /* Send the VRFY command (Note: The host name part may be absent when the host is a local system) */ - result = Curl_pp_sendf(&conn->proto.smtpc.pp, "VRFY %s%s%s", + result = Curl_pp_sendf(&conn->proto.smtpc.pp, "VRFY %s%s%s%s", address, host.name ? "@" : "", - host.name ? host.name : ""); + host.name ? host.name : "", + utf8 ? " SMTPUTF8" : ""); Curl_free_idnconverted_hostname(&host); free(address); diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc index 2a75cffdb..9b9f8e485 100644 --- a/tests/data/Makefile.inc +++ b/tests/data/Makefile.inc @@ -109,7 +109,7 @@ test927 test928 test929 test930 test931 test932 test933 test934 test935 \ test936 test937 test938 test939 test940 test941 test942 test943 test944 \ test945 test946 test947 test948 test949 test950 test951 test952 test953 \ test954 test955 test956 test957 test958 test959 test960 test961 test962 \ -test963 test964 test965 test966 \ +test963 test964 test965 test966 test967 test968 \ \ test1000 test1001 test1002 test1003 test1004 test1005 test1006 test1007 \ test1008 test1009 test1010 test1011 test1012 test1013 test1014 test1015 \ diff --git a/tests/data/test967 b/tests/data/test967 new file mode 100644 index 000000000..da9e01e77 --- /dev/null +++ b/tests/data/test967 @@ -0,0 +1,54 @@ + + + +SMTP +VRFY +IDN + + + +# +# Server-side + + +CAPA SMTPUTF8 + + +252 Send some mail and I'll try my best + + + +# +# Client-side + + +smtp + + +idn + + +LC_ALL=en_US.UTF-8 +LC_CTYPE=en_US.UTF-8 + + +perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");' + + +SMTP external VRFY with SMTPUTF8 support + + +smtp://%HOSTIP:%SMTPPORT/967 --mail-rcpt Användaren@åäö.se + + + +# +# Verify data after the test has been "shot" + + +EHLO 967 +VRFY Användaren@xn--4cab6c.se SMTPUTF8 +QUIT + + + diff --git a/tests/data/test968 b/tests/data/test968 new file mode 100644 index 000000000..5d827c91c --- /dev/null +++ b/tests/data/test968 @@ -0,0 +1,51 @@ + + + +SMTP +VRFY +IDN + + + +# +# Server-side + + +CAPA SMTPUTF8 + + + +# +# Client-side + + +smtp + + +idn + + +LC_ALL=en_US.UTF-8 +LC_CTYPE=en_US.UTF-8 + + +perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");' + + +SMTP VRFY with SMTPUTF8 support + + +smtp://%HOSTIP:%SMTPPORT/968 --mail-rcpt Användaren + + + +# +# Verify data after the test has been "shot" + + +EHLO 968 +VRFY Användaren SMTPUTF8 +QUIT + + + diff --git a/tests/ftpserver.pl b/tests/ftpserver.pl index 9c4b88aef..63dc3342c 100755 --- a/tests/ftpserver.pl +++ b/tests/ftpserver.pl @@ -1037,13 +1037,15 @@ sub VRFY_smtp { sendcontrol "501 Unrecognized parameter\r\n"; } else { + my $smtputf8 = grep /^SMTPUTF8$/, @capabilities; + # Validate the username (only a valid local or external username is # allowed, such as user or user@example.com) - if ($username !~ - /^([a-zA-Z0-9._%+-]+)(\@(([a-zA-Z0-9-]+)\.)+([a-zA-Z]{2,4}))?$/) { - sendcontrol "501 Invalid address\r\n"; - } - else { + if ((!$smtputf8 && $username =~ + /^([a-zA-Z0-9._%+-]+)(\@(([a-zA-Z0-9-]+)\.)+([a-zA-Z]{2,4}))?$/) || + ($smtputf8 && $username =~ + /^([a-zA-Z0-9\x{80}-\x{ff}._%+-]+)(\@(([a-zA-Z0-9\x{80}-\x{ff}-]+)\.)+([a-zA-Z]{2,4}))?$/)) { + my @data = getreplydata($smtp_client); if(!@data) { @@ -1060,6 +1062,9 @@ sub VRFY_smtp { sendcontrol $d; } } + else { + sendcontrol "501 Invalid address\r\n"; + } } return 0; -- cgit v1.2.1