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authorSteve Holme <steve_holme@hotmail.com>2020-02-13 22:56:51 +0000
committerSteve Holme <steve_holme@hotmail.com>2020-02-26 14:54:51 +0000
commitefce3ea5a85126d3e6c2084a7b581cc1df1b340b (patch)
tree45c0a49cfcf0bfad2c8041d460e8bdeeb41c6818
parent483edeb8dda80406f56480965d3c649bb3b2e77b (diff)
smtp: Support the SMTPUTF8 extension in the VRFY command
-rw-r--r--lib/smtp.c17
-rw-r--r--tests/data/Makefile.inc2
-rw-r--r--tests/data/test96754
-rw-r--r--tests/data/test96851
-rwxr-xr-xtests/ftpserver.pl15
5 files changed, 131 insertions, 8 deletions
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 @@
+<testcase>
+<info>
+<keywords>
+SMTP
+VRFY
+IDN
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+CAPA SMTPUTF8
+</servercmd>
+<data>
+252 Send some mail and I'll try my best
+</data>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+smtp
+</server>
+<features>
+idn
+</features>
+<setenv>
+LC_ALL=en_US.UTF-8
+LC_CTYPE=en_US.UTF-8
+</setenv>
+<precheck>
+perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");'
+</precheck>
+ <name>
+SMTP external VRFY with SMTPUTF8 support
+ </name>
+<command>
+smtp://%HOSTIP:%SMTPPORT/967 --mail-rcpt Användaren@åäö.se
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<protocol>
+EHLO 967
+VRFY Användaren@xn--4cab6c.se SMTPUTF8
+QUIT
+</protocol>
+</verify>
+</testcase>
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 @@
+<testcase>
+<info>
+<keywords>
+SMTP
+VRFY
+IDN
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<servercmd>
+CAPA SMTPUTF8
+</servercmd>
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+smtp
+</server>
+<features>
+idn
+</features>
+<setenv>
+LC_ALL=en_US.UTF-8
+LC_CTYPE=en_US.UTF-8
+</setenv>
+<precheck>
+perl -MI18N::Langinfo=langinfo,CODESET -e 'die "Needs a UTF-8 locale" if (lc(langinfo(CODESET())) ne "utf-8");'
+</precheck>
+ <name>
+SMTP VRFY with SMTPUTF8 support
+ </name>
+<command>
+smtp://%HOSTIP:%SMTPPORT/968 --mail-rcpt Användaren
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<protocol>
+EHLO 968
+VRFY Användaren SMTPUTF8
+QUIT
+</protocol>
+</verify>
+</testcase>
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;