1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
#include <string.h>
#include "tests.h"
#include "../xmlnode.h"
/*
* If we really wanted to test the billion laughs attack we would
* need to have more than just 4 ha's. But as long as this shorter
* document fails to parse, the longer one should also fail to parse.
*/
START_TEST(test_xmlnode_billion_laughs_attack)
{
const char *malicious_xml_doc = "<!DOCTYPE root [ <!ENTITY ha \"Ha !\"><!ENTITY ha2 \"&ha; &ha;\"><!ENTITY ha3 \"&ha2; &ha2;\"> ]><root>&ha3;</root>";
/* Uncomment this line if you want to see the error message given by
the parser for the above XML document */
/* purple_debug_set_enabled(TRUE); */
fail_if(purple_xmlnode_from_str(malicious_xml_doc, -1),
"purple_xmlnode_from_str() returned an XML tree, but we didn't want it to");
}
END_TEST
#define check_doc_structure(x) { \
PurpleXmlNode *ping, *child1, *child2; \
fail_if(x == NULL, "Failed to parse document"); \
ping = purple_xmlnode_get_child(x, "ping"); \
fail_if(ping == NULL, "Failed to find 'ping' child"); \
child1 = purple_xmlnode_get_child(ping, "child1"); \
fail_if(child1 == NULL, "Failed to find 'child1'"); \
child2 = purple_xmlnode_get_child(child1, "child2"); \
fail_if(child2 == NULL, "Failed to find 'child2'"); \
purple_xmlnode_new_child(child2, "a"); \
\
assert_string_equal("jabber:client", purple_xmlnode_get_namespace(x)); \
/* NOTE: purple_xmlnode_get_namespace() returns the namespace of the element, not the
* current default namespace. See http://www.w3.org/TR/xml-names/#defaulting and
* http://www.w3.org/TR/xml-names/#dt-defaultNS.
*/ \
assert_string_equal("urn:xmpp:ping", purple_xmlnode_get_namespace(ping)); \
assert_string_equal("jabber:client", purple_xmlnode_get_namespace(child1)); \
assert_string_equal("urn:xmpp:ping", purple_xmlnode_get_namespace(child2)); \
/*
* This fails (well, actually crashes [the ns is NULL]) unless
* purple_xmlnode_new_child() actually sets the element namespace.
assert_string_equal("jabber:client", purple_xmlnode_get_namespace(purple_xmlnode_get_child(child2, "a")));
*/ \
\
assert_string_equal("jabber:client", purple_xmlnode_get_default_namespace(x)); \
assert_string_equal("jabber:client", purple_xmlnode_get_default_namespace(ping)); \
assert_string_equal("jabber:client", purple_xmlnode_get_default_namespace(child1)); \
assert_string_equal("jabber:client", purple_xmlnode_get_default_namespace(child2)); \
}
START_TEST(test_xmlnode_prefixes)
{
const char *xml_doc =
"<iq type='get' xmlns='jabber:client' xmlns:ping='urn:xmpp:ping'>"
"<ping:ping>"
"<child1>"
"<ping:child2></ping:child2>" /* xmlns='jabber:child' */
"</child1>"
"</ping:ping>"
"</iq>";
char *str;
PurpleXmlNode *xml, *reparsed;
xml = purple_xmlnode_from_str(xml_doc, -1);
check_doc_structure(xml);
/* Check that purple_xmlnode_from_str(purple_xmlnode_to_str(xml, NULL), -1) is idempotent. */
str = purple_xmlnode_to_str(xml, NULL);
fail_if(str == NULL, "Failed to serialize XMLnode");
reparsed = purple_xmlnode_from_str(str, -1);
fail_if(reparsed == NULL, "Failed to reparse xml document");
check_doc_structure(reparsed);
g_free(str);
purple_xmlnode_free(xml);
purple_xmlnode_free(reparsed);
}
END_TEST
START_TEST(test_strip_prefixes)
{
const char *xml_doc = "<message xmlns='jabber:client' from='user@gmail.com/resource' to='another_user@darkrain42.org' type='chat' id='purple'>"
"<cha:active xmlns:cha='http://jabber.org/protocol/chatstates'/>"
"<body>xvlc xvlc</body>"
"<im:html xmlns:im='http://jabber.org/protocol/xhtml-im'>"
"<xht:body xmlns:xht='http://www.w3.org/1999/xhtml'>"
"<xht:p>xvlc <xht:span style='font-weight: bold;'>xvlc</xht:span></xht:p>"
"</xht:body>"
"</im:html>"
"</message>";
const char *out = "<message xmlns='jabber:client' from='user@gmail.com/resource' to='another_user@darkrain42.org' type='chat' id='purple'>"
"<active xmlns:cha='http://jabber.org/protocol/chatstates' xmlns='http://jabber.org/protocol/chatstates'/>"
"<body>xvlc xvlc</body>"
"<html xmlns:im='http://jabber.org/protocol/xhtml-im' xmlns='http://jabber.org/protocol/xhtml-im'>"
"<body xmlns:xht='http://www.w3.org/1999/xhtml' xmlns='http://www.w3.org/1999/xhtml'>"
"<p>xvlc <span style='font-weight: bold;'>xvlc</span></p>"
"</body>"
"</html>"
"</message>";
char *str;
PurpleXmlNode *xml;
xml = purple_xmlnode_from_str(xml_doc, -1);
fail_if(xml == NULL, "Failed to parse XML");
purple_xmlnode_strip_prefixes(xml);
str = purple_xmlnode_to_str(xml, NULL);
assert_string_equal_free(out, str);
purple_xmlnode_free(xml);
}
END_TEST
Suite *
purple_xmlnode_suite(void)
{
Suite *s = suite_create("Utility Functions");
TCase *tc = tcase_create("xmlnode");
tcase_add_test(tc, test_xmlnode_billion_laughs_attack);
tcase_add_test(tc, test_xmlnode_prefixes);
tcase_add_test(tc, test_strip_prefixes);
suite_add_tcase(s, tc);
return s;
}
|
