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smtp: Support the SMTPUTF8 extension for the EXPN command

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Simply notify the server we support the SMTPUTF8 extension if it does.
This commit is contained in:
Steve Holme 2020-02-09 16:41:34 +00:00
parent efce3ea5a8
commit 34a1ffb05f
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GPG Key ID: 4059CB85CA7E8F19
3 changed files with 67 additions and 10 deletions
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25
lib/smtp.c
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@ -487,16 +487,16 @@ static CURLcode smtp_perform_command(struct connectdata *conn)
struct SMTP *smtp = data->req.protop;
if(smtp->rcpt) {
/* 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;
if((!smtp->custom) || (!smtp->custom[0])) {
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,
@ -521,10 +521,17 @@ static CURLcode smtp_perform_command(struct connectdata *conn)
Curl_free_idnconverted_hostname(&host);
free(address);
}
else
else {
/* Establish whether we should report that we support SMTPUTF8 for EXPN
commands to the server as per RFC-6531 sect. 3.1 point 6 */
utf8 = (conn->proto.smtpc.utf8_supported) &&
(!strcmp(smtp->custom, "EXPN"));
/* Send the custom recipient based command such as the EXPN command */
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s %s", smtp->custom,
smtp->rcpt->data);
result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s %s%s", smtp->custom,
smtp->rcpt->data,
utf8 ? " SMTPUTF8" : "");
}
}
else
/* Send the non-recipient based command such as HELP */

2
tests/data/Makefile.inc
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@ -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 test967 test968 \
test963 test964 test965 test966 test967 test968 test969 \
\
test1000 test1001 test1002 test1003 test1004 test1005 test1006 test1007 \
test1008 test1009 test1010 test1011 test1012 test1013 test1014 test1015 \

50
tests/data/test969 Normal file
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@ -0,0 +1,50 @@
<testcase>
<info>
<keywords>
SMTP
EXPN
CUSTOMREQUEST
IDN
</keywords>
</info>
#
# Server-side
<reply>
<servercmd>
CAPA SMTPUTF8
</servercmd>
<data>
250-Joe Smith <joe.smith@example.com>
250-Harry Smith <harry.smith@example.com>
250 Melvin Smith <melvin.smith@example.com>
</data>
</reply>
#
# Client-side
<client>
<server>
smtp
</server>
<features>
idn
</features>
<name>
SMTP mailing list EXPN (CUSTOMREQUEST) with SMTPUTF8 support
</name>
<command>
smtp://%HOSTIP:%SMTPPORT/969 --mail-rcpt Friends -X EXPN
</command>
</client>
#
# Verify data after the test has been "shot"
<verify>
<protocol>
EHLO 969
EXPN Friends SMTPUTF8
QUIT
</protocol>
</verify>
</testcase>