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ftp: remove superfluous checking for crlf in user or pwd

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... as this is already done much earlier in the URL parser.

Also add test case 894 that verifies that pop3 with an encodedd CR in
the user name is rejected.

Closes #4887
This commit is contained in:
Daniel Stenberg 2020-02-06 11:36:53 +01:00
parent c87730daeb
commit 950b53da0d
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GPG Key ID: 5CC908FDB71E12C2
3 changed files with 38 additions and 19 deletions
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17
lib/ftp.c
View File

@ -253,18 +253,6 @@ static void freedirs(struct ftp_conn *ftpc)
Curl_safefree(ftpc->newhost);
}
/* Returns non-zero if the given string contains CR (\r) or LF (\n),
which are not allowed within RFC 959 <string>.
Note: The input string is in the client's encoding which might
not be ASCII, so escape sequences \r & \n must be used instead
of hex values 0x0d & 0x0a.
*/
static bool isBadFtpString(const char *string)
{
return ((NULL != strchr(string, '\r')) ||
(NULL != strchr(string, '\n'))) ? TRUE : FALSE;
}
/***********************************************************************
*
* AcceptServerConnect()
@ -4377,11 +4365,6 @@ static CURLcode ftp_setup_connection(struct connectdata *conn)
*/
ftp->user = conn->user;
ftp->passwd = conn->passwd;
if(isBadFtpString(ftp->user))
return CURLE_URL_MALFORMAT;
if(isBadFtpString(ftp->passwd))
return CURLE_URL_MALFORMAT;
conn->proto.ftpc.known_filesize = -1; /* unknown size for now */
return CURLE_OK;

3
tests/data/Makefile.inc
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@ -96,12 +96,11 @@ test818 test819 test820 test821 test822 test823 test824 test825 test826 \
test827 test828 test829 test830 test831 test832 test833 test834 test835 \
test836 test837 test838 test839 test840 test841 test842 test843 test844 \
test845 test846 test847 test848 test849 \
\
test850 test851 test852 test853 test854 test855 test856 test857 test858 \
test859 test860 test861 test862 test863 test864 test865 test866 test867 \
test868 test869 test870 test871 test872 test873 test874 test875 test876 \
test877 test878 test879 test880 test881 test882 test883 test884 test885 \
test886 test887 test888 test889 test890 test891 test892 test893 \
test886 test887 test888 test889 test890 test891 test892 test893 test894 \
\
test900 test901 test902 test903 test904 test905 test906 test907 test908 \
test909 test910 test911 test912 test913 test914 test915 test916 test917 \

37
tests/data/test894 Normal file
View File

@ -0,0 +1,37 @@
<testcase>
<info>
<keywords>
POP3
Clear Text
RETR
</keywords>
</info>
#
# Server-side
<reply>
</reply>
#
# Client-side
<client>
<server>
pop3
</server>
<name>
POP3 with CR in username
</name>
<command>
pop3://user%0dFRIGGING_cmd:secret@%HOSTIP:%POP3PORT/894
</command>
</client>
#
# Verify data after the test has been "shot"
<verify>
# malformed URL
<errorcode>
3
</errorcode>
</verify>
</testcase>