qemu/tests/check-qjson.c

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/*
* Copyright IBM, Corp. 2009
json-parser: Accept 'null' in QMP We document that in QMP, the client may send any json-value for the optional "id" key, and then return that same value on reply (both success and failures, insofar as the failure happened after parsing the id). [Note that the output may not be identical to the input, as whitespace may change and since we may reorder keys within a json-object, but that this still constitutes the same json-value]. However, we were not handling the JSON literal null, which counts as a json-value per RFC 7159. Also, down the road, given the QAPI schema of {'*foo':'str'} or {'*foo':'ComplexType'}, we could decide to allow the QMP client to pass { "foo":null } instead of the current representation of { } where omitting the key is the only way to get at the default NULL value. Such a change might be useful for argument introspection (if a type in older qemu lacks 'foo' altogether, then an explicit "foo":null probe will force an easily distinguished error message for whether the optional "foo" key is even understood in newer qemu). And if we add default values to optional arguments, allowing an explicit null would be required for getting a NULL value associated with an optional string that has a non-null default. But all that can come at a later day. The 'check-unit' testsuite is enhanced to test that parsing produces the same object as explicitly requesting a reference to the special qnull object. In addition, I tested with: $ ./x86_64-softmmu/qemu-system-x86_64 -qmp stdio -nodefaults {"QMP": {"version": {"qemu": {"micro": 91, "minor": 2, "major": 2}, "package": ""}, "capabilities": []}} {"execute":"qmp_capabilities","id":null} {"return": {}, "id": null} {"id":{"a":null,"b":[1,null]},"execute":"quit"} {"return": {}, "id": {"a": null, "b": [1, null]}} {"timestamp": {"seconds": 1427742379, "microseconds": 423128}, "event": "SHUTDOWN"} Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-04-30 05:35:06 +08:00
* Copyright (c) 2013, 2015 Red Hat Inc.
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
* Markus Armbruster <armbru@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qapi/qmp/qbool.h"
#include "qapi/qmp/qjson.h"
#include "qapi/qmp/qlit.h"
#include "qapi/qmp/qnull.h"
#include "qapi/qmp/qnum.h"
#include "qapi/qmp/qstring.h"
#include "qemu/unicode.h"
#include "qemu-common.h"
static QString *from_json_str(const char *jstr, bool single, Error **errp)
{
char quote = single ? '\'' : '"';
char *qjstr = g_strdup_printf("%c%s%c", quote, jstr, quote);
QString *ret = qobject_to(QString, qobject_from_json(qjstr, errp));
g_free(qjstr);
return ret;
}
static char *to_json_str(QString *str)
{
QString *json = qobject_to_json(QOBJECT(str));
char *jstr;
if (!json) {
return NULL;
}
/* peel off double quotes */
jstr = g_strndup(qstring_get_str(json) + 1,
qstring_get_length(json) - 2);
qobject_unref(json);
return jstr;
}
static void escaped_string(void)
{
struct {
/* Content of JSON string to parse with qobject_from_json() */
const char *json_in;
/* Expected parse output; to unparse with qobject_to_json() */
const char *utf8_out;
int skip;
} test_cases[] = {
{ "\\b\\f\\n\\r\\t\\\\\\\"", "\b\f\n\r\t\\\"" },
{ "\\/\\'", "/'", .skip = 1 },
{ "single byte utf-8 \\u0020", "single byte utf-8 ", .skip = 1 },
{ "double byte utf-8 \\u00A2", "double byte utf-8 \xc2\xa2" },
{ "triple byte utf-8 \\u20AC", "triple byte utf-8 \xe2\x82\xac" },
{ "quadruple byte utf-8 \\uD834\\uDD1E", /* U+1D11E */
"quadruple byte utf-8 \xF0\x9D\x84\x9E" },
{ "\\", NULL },
{ "\\z", NULL },
{ "\\ux", NULL },
{ "\\u1x", NULL },
{ "\\u12x", NULL },
{ "\\u123x", NULL },
{ "\\u12345", "\341\210\2645" },
{ "\\u0000x", "\xC0\x80x" },
{ "unpaired leading surrogate \\uD800", NULL },
{ "unpaired leading surrogate \\uD800\\uCAFE", NULL },
{ "unpaired leading surrogate \\uD800\\uD801\\uDC02", NULL },
{ "unpaired trailing surrogate \\uDC00", NULL },
{ "backward surrogate pair \\uDC00\\uD800", NULL },
{ "noncharacter U+FDD0 \\uFDD0", NULL },
{ "noncharacter U+FDEF \\uFDEF", NULL },
{ "noncharacter U+1FFFE \\uD87F\\uDFFE", NULL },
{ "noncharacter U+10FFFF \\uDC3F\\uDFFF", NULL },
{}
};
int i, j;
QString *cstr;
char *jstr;
for (i = 0; test_cases[i].json_in; i++) {
for (j = 0; j < 2; j++) {
if (test_cases[i].utf8_out) {
cstr = from_json_str(test_cases[i].json_in, j, &error_abort);
g_assert_cmpstr(qstring_get_try_str(cstr),
==, test_cases[i].utf8_out);
if (!test_cases[i].skip) {
jstr = to_json_str(cstr);
g_assert_cmpstr(jstr, ==, test_cases[i].json_in);
g_free(jstr);
}
qobject_unref(cstr);
} else {
cstr = from_json_str(test_cases[i].json_in, j, NULL);
g_assert(!cstr);
}
}
}
}
static void string_with_quotes(void)
{
const char *test_cases[] = {
"\"the bee's knees\"",
"'double quote \"'",
NULL
};
int i;
QString *str;
char *cstr;
for (i = 0; test_cases[i]; i++) {
str = qobject_to(QString,
qobject_from_json(test_cases[i], &error_abort));
g_assert(str);
cstr = g_strndup(test_cases[i] + 1, strlen(test_cases[i]) - 2);
g_assert_cmpstr(qstring_get_str(str), ==, cstr);
g_free(cstr);
qobject_unref(str);
}
}
static void utf8_string(void)
{
/*
* Most test cases are scraped from Markus Kuhn's UTF-8 decoder
* capability and stress test at
* http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt
*/
static const struct {
/* Content of JSON string to parse with qobject_from_json() */
const char *json_in;
/* Expected parse output */
const char *utf8_out;
/* Expected unparse output, defaults to @json_in */
const char *json_out;
} test_cases[] = {
/* 0 Control characters */
{
/*
* Note: \x00 is impossible, other representations of
* U+0000 are covered under 4.3
*/
"\x01\x02\x03\x04\x05\x06\x07"
"\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F"
"\x10\x11\x12\x13\x14\x15\x16\x17"
"\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F",
NULL,
"\\u0001\\u0002\\u0003\\u0004\\u0005\\u0006\\u0007"
"\\b\\t\\n\\u000B\\f\\r\\u000E\\u000F"
"\\u0010\\u0011\\u0012\\u0013\\u0014\\u0015\\u0016\\u0017"
"\\u0018\\u0019\\u001A\\u001B\\u001C\\u001D\\u001E\\u001F",
},
/* 1 Some correct UTF-8 text */
{
/* a bit of German */
"Falsches \xC3\x9C" "ben von Xylophonmusik qu\xC3\xA4lt"
" jeden gr\xC3\xB6\xC3\x9F" "eren Zwerg.",
"Falsches \xC3\x9C" "ben von Xylophonmusik qu\xC3\xA4lt"
" jeden gr\xC3\xB6\xC3\x9F" "eren Zwerg.",
"Falsches \\u00DCben von Xylophonmusik qu\\u00E4lt"
" jeden gr\\u00F6\\u00DFeren Zwerg.",
},
{
/* a bit of Greek */
"\xCE\xBA\xE1\xBD\xB9\xCF\x83\xCE\xBC\xCE\xB5",
"\xCE\xBA\xE1\xBD\xB9\xCF\x83\xCE\xBC\xCE\xB5",
"\\u03BA\\u1F79\\u03C3\\u03BC\\u03B5",
json: Fix % handling when not interpolating Commit 8bca4613 added support for %% in json strings when interpolating, but in doing so broke handling of % when not interpolating. When parse_string() is fed a string token containing '%', it skips the '%' regardless of ctxt->ap, i.e. even it's not interpolating. If the '%' is the string's last character, it fails an assertion. Else, it "merely" swallows the '%'. Fix parse_string() to handle '%' specially only when interpolating. To gauge the bug's impact, let's review non-interpolating users of this parser, i.e. code passing NULL context to json_message_parser_init(): * tests/check-qjson.c, tests/test-qobject-input-visitor.c, tests/test-visitor-serialization.c Plenty of tests, but we still failed to cover the buggy case. * monitor.c: QMP input * qga/main.c: QGA input * qobject_from_json(): - qobject-input-visitor.c: JSON command line option arguments of -display and -blockdev Reproducer: -blockdev '{"%"}' - block.c: JSON pseudo-filenames starting with "json:" Reproducer: https://bugzilla.redhat.com/show_bug.cgi?id=1668244#c3 - block/rbd.c: JSON key pairs Pseudo-filenames starting with "rbd:". Command line, QMP and QGA input are trusted. Filenames are trusted when they come from command line, QMP or HMP. They are untrusted when they come from from image file headers. Example: QCOW2 backing file name. Note that this is *not* the security boundary between host and guest. It's the boundary between host and an image file from an untrusted source. Neither failing an assertion nor skipping a character in a filename of your choice looks exploitable. Note that we don't support compiling with NDEBUG. Fixes: 8bca4613e6cddd948895b8db3def05950463495b Cc: qemu-stable@nongnu.org Signed-off-by: Christophe Fergeau <cfergeau@redhat.com> Message-Id: <20190102140535.11512-1-cfergeau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Tested-by: Richard W.M. Jones <rjones@redhat.com> [Commit message extended to discuss impact] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2019-01-02 22:05:35 +08:00
},
/* '%' character when not interpolating */
{
"100%",
"100%",
},
/* 2 Boundary condition test cases */
/* 2.1 First possible sequence of a certain length */
/*
* 2.1.1 1 byte U+0020
* Control characters are already covered by their own test
* case under 0. Test the first 1 byte non-control character
* here.
*/
{
" ",
" ",
},
/* 2.1.2 2 bytes U+0080 */
{
"\xC2\x80",
"\xC2\x80",
"\\u0080",
},
/* 2.1.3 3 bytes U+0800 */
{
"\xE0\xA0\x80",
"\xE0\xA0\x80",
"\\u0800",
},
/* 2.1.4 4 bytes U+10000 */
{
"\xF0\x90\x80\x80",
"\xF0\x90\x80\x80",
"\\uD800\\uDC00",
},
/* 2.1.5 5 bytes U+200000 */
{
"\xF8\x88\x80\x80\x80",
NULL,
"\\uFFFD",
},
/* 2.1.6 6 bytes U+4000000 */
{
"\xFC\x84\x80\x80\x80\x80",
NULL,
"\\uFFFD",
},
/* 2.2 Last possible sequence of a certain length */
/* 2.2.1 1 byte U+007F */
{
"\x7F",
"\x7F",
"\\u007F",
},
/* 2.2.2 2 bytes U+07FF */
{
"\xDF\xBF",
"\xDF\xBF",
"\\u07FF",
},
/*
* 2.2.3 3 bytes U+FFFC
* The last possible sequence is actually U+FFFF. But that's
* a noncharacter, and already covered by its own test case
* under 5.3. Same for U+FFFE. U+FFFD is the last character
* in the BMP, and covered under 2.3. Because of U+FFFD's
* special role as replacement character, it's worth testing
* U+FFFC here.
*/
{
"\xEF\xBF\xBC",
"\xEF\xBF\xBC",
"\\uFFFC",
},
/* 2.2.4 4 bytes U+1FFFFF */
{
"\xF7\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 2.2.5 5 bytes U+3FFFFFF */
{
"\xFB\xBF\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 2.2.6 6 bytes U+7FFFFFFF */
{
"\xFD\xBF\xBF\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 2.3 Other boundary conditions */
{
/* last one before surrogate range: U+D7FF */
"\xED\x9F\xBF",
"\xED\x9F\xBF",
"\\uD7FF",
},
{
/* first one after surrogate range: U+E000 */
"\xEE\x80\x80",
"\xEE\x80\x80",
"\\uE000",
},
{
/* last one in BMP: U+FFFD */
"\xEF\xBF\xBD",
"\xEF\xBF\xBD",
"\\uFFFD",
},
{
/* last one in last plane: U+10FFFD */
"\xF4\x8F\xBF\xBD",
"\xF4\x8F\xBF\xBD",
"\\uDBFF\\uDFFD"
},
{
/* first one beyond Unicode range: U+110000 */
"\xF4\x90\x80\x80",
NULL,
"\\uFFFD",
},
/* 3 Malformed sequences */
/* 3.1 Unexpected continuation bytes */
/* 3.1.1 First continuation byte */
{
"\x80",
NULL,
"\\uFFFD",
},
/* 3.1.2 Last continuation byte */
{
"\xBF",
NULL,
"\\uFFFD",
},
/* 3.1.3 2 continuation bytes */
{
"\x80\xBF",
NULL,
"\\uFFFD\\uFFFD",
},
/* 3.1.4 3 continuation bytes */
{
"\x80\xBF\x80",
NULL,
"\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.1.5 4 continuation bytes */
{
"\x80\xBF\x80\xBF",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.1.6 5 continuation bytes */
{
"\x80\xBF\x80\xBF\x80",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.1.7 6 continuation bytes */
{
"\x80\xBF\x80\xBF\x80\xBF",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.1.8 7 continuation bytes */
{
"\x80\xBF\x80\xBF\x80\xBF\x80",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.1.9 Sequence of all 64 possible continuation bytes */
{
"\x80\x81\x82\x83\x84\x85\x86\x87"
"\x88\x89\x8A\x8B\x8C\x8D\x8E\x8F"
"\x90\x91\x92\x93\x94\x95\x96\x97"
"\x98\x99\x9A\x9B\x9C\x9D\x9E\x9F"
"\xA0\xA1\xA2\xA3\xA4\xA5\xA6\xA7"
"\xA8\xA9\xAA\xAB\xAC\xAD\xAE\xAF"
"\xB0\xB1\xB2\xB3\xB4\xB5\xB6\xB7"
"\xB8\xB9\xBA\xBB\xBC\xBD\xBE\xBF",
NULL,
qjson: to_json() case QTYPE_QSTRING is buggy, rewrite Known bugs in to_json(): * A start byte for a three-byte sequence followed by less than two continuation bytes is split into one-byte sequences. * Start bytes for sequences longer than three bytes get misinterpreted as start bytes for three-byte sequences. Continuation bytes beyond byte three become one-byte sequences. This means all characters outside the BMP are decoded incorrectly. * One-byte sequences with the MSB are put into the JSON string verbatim when char is unsigned, producing invalid UTF-8. When char is signed, they're replaced by "\\uFFFF" instead. This includes \xFE, \xFF, and stray continuation bytes. * Overlong sequences are happily accepted, unless screwed up by the bugs above. * Likewise, sequences encoding surrogate code points or noncharacters. * Unlike other control characters, ASCII DEL is not escaped. Except in overlong encodings. My rewrite fixes them as follows: * Malformed UTF-8 sequences are replaced. Except the overlong encoding \xC0\x80 of U+0000 is still accepted. Permits embedding NUL characters in C strings. This trick is known as "Modified UTF-8". * Sequences encoding code points beyond Unicode range are replaced. * Sequences encoding code points beyond the BMP produce a surrogate pair. * Sequences encoding surrogate code points are replaced. * Sequences encoding noncharacters are replaced. * ASCII DEL is now always escaped. The replacement character is U+FFFD. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-04-12 00:07:21 +08:00
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.2 Lonely start characters */
/* 3.2.1 All 32 first bytes of 2-byte sequences, followed by space */
{
"\xC0 \xC1 \xC2 \xC3 \xC4 \xC5 \xC6 \xC7 "
"\xC8 \xC9 \xCA \xCB \xCC \xCD \xCE \xCF "
"\xD0 \xD1 \xD2 \xD3 \xD4 \xD5 \xD6 \xD7 "
"\xD8 \xD9 \xDA \xDB \xDC \xDD \xDE \xDF ",
NULL,
qjson: to_json() case QTYPE_QSTRING is buggy, rewrite Known bugs in to_json(): * A start byte for a three-byte sequence followed by less than two continuation bytes is split into one-byte sequences. * Start bytes for sequences longer than three bytes get misinterpreted as start bytes for three-byte sequences. Continuation bytes beyond byte three become one-byte sequences. This means all characters outside the BMP are decoded incorrectly. * One-byte sequences with the MSB are put into the JSON string verbatim when char is unsigned, producing invalid UTF-8. When char is signed, they're replaced by "\\uFFFF" instead. This includes \xFE, \xFF, and stray continuation bytes. * Overlong sequences are happily accepted, unless screwed up by the bugs above. * Likewise, sequences encoding surrogate code points or noncharacters. * Unlike other control characters, ASCII DEL is not escaped. Except in overlong encodings. My rewrite fixes them as follows: * Malformed UTF-8 sequences are replaced. Except the overlong encoding \xC0\x80 of U+0000 is still accepted. Permits embedding NUL characters in C strings. This trick is known as "Modified UTF-8". * Sequences encoding code points beyond Unicode range are replaced. * Sequences encoding code points beyond the BMP produce a surrogate pair. * Sequences encoding surrogate code points are replaced. * Sequences encoding noncharacters are replaced. * ASCII DEL is now always escaped. The replacement character is U+FFFD. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-04-12 00:07:21 +08:00
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD "
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD "
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD "
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD ",
},
/* 3.2.2 All 16 first bytes of 3-byte sequences, followed by space */
{
"\xE0 \xE1 \xE2 \xE3 \xE4 \xE5 \xE6 \xE7 "
"\xE8 \xE9 \xEA \xEB \xEC \xED \xEE \xEF ",
NULL,
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD "
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD ",
},
/* 3.2.3 All 8 first bytes of 4-byte sequences, followed by space */
{
"\xF0 \xF1 \xF2 \xF3 \xF4 \xF5 \xF6 \xF7 ",
NULL,
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD \\uFFFD ",
},
/* 3.2.4 All 4 first bytes of 5-byte sequences, followed by space */
{
"\xF8 \xF9 \xFA \xFB ",
NULL,
"\\uFFFD \\uFFFD \\uFFFD \\uFFFD ",
},
/* 3.2.5 All 2 first bytes of 6-byte sequences, followed by space */
{
"\xFC \xFD ",
NULL,
"\\uFFFD \\uFFFD ",
},
/* 3.3 Sequences with last continuation byte missing */
/* 3.3.1 2-byte sequence with last byte missing (U+0000) */
{
"\xC0",
NULL,
"\\uFFFD",
},
/* 3.3.2 3-byte sequence with last byte missing (U+0000) */
{
"\xE0\x80",
NULL,
"\\uFFFD",
},
/* 3.3.3 4-byte sequence with last byte missing (U+0000) */
{
"\xF0\x80\x80",
NULL,
"\\uFFFD",
},
/* 3.3.4 5-byte sequence with last byte missing (U+0000) */
{
"\xF8\x80\x80\x80",
NULL,
"\\uFFFD",
},
/* 3.3.5 6-byte sequence with last byte missing (U+0000) */
{
"\xFC\x80\x80\x80\x80",
NULL,
"\\uFFFD",
},
/* 3.3.6 2-byte sequence with last byte missing (U+07FF) */
{
"\xDF",
NULL,
"\\uFFFD",
},
/* 3.3.7 3-byte sequence with last byte missing (U+FFFF) */
{
"\xEF\xBF",
NULL,
"\\uFFFD",
},
/* 3.3.8 4-byte sequence with last byte missing (U+1FFFFF) */
{
"\xF7\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 3.3.9 5-byte sequence with last byte missing (U+3FFFFFF) */
{
"\xFB\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 3.3.10 6-byte sequence with last byte missing (U+7FFFFFFF) */
{
"\xFD\xBF\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 3.4 Concatenation of incomplete sequences */
{
"\xC0\xE0\x80\xF0\x80\x80\xF8\x80\x80\x80\xFC\x80\x80\x80\x80"
"\xDF\xEF\xBF\xF7\xBF\xBF\xFB\xBF\xBF\xBF\xFD\xBF\xBF\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 3.5 Impossible bytes */
{
"\xFE",
NULL,
"\\uFFFD",
},
{
"\xFF",
NULL,
"\\uFFFD",
},
{
"\xFE\xFE\xFF\xFF",
NULL,
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
/* 4 Overlong sequences */
/* 4.1 Overlong '/' */
{
"\xC0\xAF",
NULL,
"\\uFFFD",
},
{
"\xE0\x80\xAF",
NULL,
"\\uFFFD",
},
{
"\xF0\x80\x80\xAF",
NULL,
"\\uFFFD",
},
{
"\xF8\x80\x80\x80\xAF",
NULL,
"\\uFFFD",
},
{
"\xFC\x80\x80\x80\x80\xAF",
NULL,
"\\uFFFD",
},
/*
* 4.2 Maximum overlong sequences
* Highest Unicode value that is still resulting in an
* overlong sequence if represented with the given number of
* bytes. This is a boundary test for safe UTF-8 decoders.
*/
{
/* \U+007F */
"\xC1\xBF",
NULL,
"\\uFFFD",
},
{
/* \U+07FF */
"\xE0\x9F\xBF",
NULL,
"\\uFFFD",
},
{
/*
* \U+FFFC
* The actual maximum would be U+FFFF, but that's a
* noncharacter. Testing U+FFFC seems more useful. See
* also 2.2.3
*/
"\xF0\x8F\xBF\xBC",
NULL,
"\\uFFFD",
},
{
/* \U+1FFFFF */
"\xF8\x87\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
{
/* \U+3FFFFFF */
"\xFC\x83\xBF\xBF\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 4.3 Overlong representation of the NUL character */
{
/* \U+0000 */
"\xC0\x80",
"\xC0\x80",
"\\u0000",
},
{
/* \U+0000 */
"\xE0\x80\x80",
NULL,
"\\uFFFD",
},
{
/* \U+0000 */
"\xF0\x80\x80\x80",
NULL,
"\\uFFFD",
},
{
/* \U+0000 */
"\xF8\x80\x80\x80\x80",
NULL,
"\\uFFFD",
},
{
/* \U+0000 */
"\xFC\x80\x80\x80\x80\x80",
NULL,
"\\uFFFD",
},
/* 5 Illegal code positions */
/* 5.1 Single UTF-16 surrogates */
{
/* \U+D800 */
"\xED\xA0\x80",
NULL,
"\\uFFFD",
},
{
/* \U+DB7F */
"\xED\xAD\xBF",
NULL,
"\\uFFFD",
},
{
/* \U+DB80 */
"\xED\xAE\x80",
NULL,
"\\uFFFD",
},
{
/* \U+DBFF */
"\xED\xAF\xBF",
NULL,
"\\uFFFD",
},
{
/* \U+DC00 */
"\xED\xB0\x80",
NULL,
"\\uFFFD",
},
{
/* \U+DF80 */
"\xED\xBE\x80",
NULL,
"\\uFFFD",
},
{
/* \U+DFFF */
"\xED\xBF\xBF",
NULL,
"\\uFFFD",
},
/* 5.2 Paired UTF-16 surrogates */
{
/* \U+D800\U+DC00 */
"\xED\xA0\x80\xED\xB0\x80",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+D800\U+DFFF */
"\xED\xA0\x80\xED\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DB7F\U+DC00 */
"\xED\xAD\xBF\xED\xB0\x80",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DB7F\U+DFFF */
"\xED\xAD\xBF\xED\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DB80\U+DC00 */
"\xED\xAE\x80\xED\xB0\x80",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DB80\U+DFFF */
"\xED\xAE\x80\xED\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DBFF\U+DC00 */
"\xED\xAF\xBF\xED\xB0\x80",
NULL,
"\\uFFFD\\uFFFD",
},
{
/* \U+DBFF\U+DFFF */
"\xED\xAF\xBF\xED\xBF\xBF",
NULL,
"\\uFFFD\\uFFFD",
},
/* 5.3 Other illegal code positions */
/* BMP noncharacters */
{
/* \U+FFFE */
"\xEF\xBF\xBE",
NULL,
"\\uFFFD",
},
{
/* \U+FFFF */
"\xEF\xBF\xBF",
NULL,
"\\uFFFD",
},
{
/* U+FDD0 */
"\xEF\xB7\x90",
NULL,
"\\uFFFD",
},
{
/* U+FDEF */
"\xEF\xB7\xAF",
NULL,
"\\uFFFD",
},
/* Plane 1 .. 16 noncharacters */
{
/* U+1FFFE U+1FFFF U+2FFFE U+2FFFF ... U+10FFFE U+10FFFF */
"\xF0\x9F\xBF\xBE\xF0\x9F\xBF\xBF"
"\xF0\xAF\xBF\xBE\xF0\xAF\xBF\xBF"
"\xF0\xBF\xBF\xBE\xF0\xBF\xBF\xBF"
"\xF1\x8F\xBF\xBE\xF1\x8F\xBF\xBF"
"\xF1\x9F\xBF\xBE\xF1\x9F\xBF\xBF"
"\xF1\xAF\xBF\xBE\xF1\xAF\xBF\xBF"
"\xF1\xBF\xBF\xBE\xF1\xBF\xBF\xBF"
"\xF2\x8F\xBF\xBE\xF2\x8F\xBF\xBF"
"\xF2\x9F\xBF\xBE\xF2\x9F\xBF\xBF"
"\xF2\xAF\xBF\xBE\xF2\xAF\xBF\xBF"
"\xF2\xBF\xBF\xBE\xF2\xBF\xBF\xBF"
"\xF3\x8F\xBF\xBE\xF3\x8F\xBF\xBF"
"\xF3\x9F\xBF\xBE\xF3\x9F\xBF\xBF"
"\xF3\xAF\xBF\xBE\xF3\xAF\xBF\xBF"
"\xF3\xBF\xBF\xBE\xF3\xBF\xBF\xBF"
"\xF4\x8F\xBF\xBE\xF4\x8F\xBF\xBF",
NULL,
qjson: to_json() case QTYPE_QSTRING is buggy, rewrite Known bugs in to_json(): * A start byte for a three-byte sequence followed by less than two continuation bytes is split into one-byte sequences. * Start bytes for sequences longer than three bytes get misinterpreted as start bytes for three-byte sequences. Continuation bytes beyond byte three become one-byte sequences. This means all characters outside the BMP are decoded incorrectly. * One-byte sequences with the MSB are put into the JSON string verbatim when char is unsigned, producing invalid UTF-8. When char is signed, they're replaced by "\\uFFFF" instead. This includes \xFE, \xFF, and stray continuation bytes. * Overlong sequences are happily accepted, unless screwed up by the bugs above. * Likewise, sequences encoding surrogate code points or noncharacters. * Unlike other control characters, ASCII DEL is not escaped. Except in overlong encodings. My rewrite fixes them as follows: * Malformed UTF-8 sequences are replaced. Except the overlong encoding \xC0\x80 of U+0000 is still accepted. Permits embedding NUL characters in C strings. This trick is known as "Modified UTF-8". * Sequences encoding code points beyond Unicode range are replaced. * Sequences encoding code points beyond the BMP produce a surrogate pair. * Sequences encoding surrogate code points are replaced. * Sequences encoding noncharacters are replaced. * ASCII DEL is now always escaped. The replacement character is U+FFFD. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2013-04-12 00:07:21 +08:00
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD"
"\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD\\uFFFD",
},
{}
};
int i, j;
QString *str;
const char *json_in, *utf8_out, *utf8_in, *json_out, *tail;
char *end, *in, *jstr;
for (i = 0; test_cases[i].json_in; i++) {
for (j = 0; j < 2; j++) {
json_in = test_cases[i].json_in;
utf8_out = test_cases[i].utf8_out;
utf8_in = test_cases[i].utf8_out ?: test_cases[i].json_in;
json_out = test_cases[i].json_out ?: test_cases[i].json_in;
/* Parse @json_in, expect @utf8_out */
if (utf8_out) {
str = from_json_str(json_in, j, &error_abort);
g_assert_cmpstr(qstring_get_try_str(str), ==, utf8_out);
qobject_unref(str);
} else {
str = from_json_str(json_in, j, NULL);
g_assert(!str);
/*
* Failure may be due to any sequence, but *all* sequences
* are expected to fail. Test each one in isolation.
*/
for (tail = json_in; *tail; tail = end) {
mod_utf8_codepoint(tail, 6, &end);
if (*end == ' ') {
end++;
}
in = g_strndup(tail, end - tail);
str = from_json_str(in, j, NULL);
g_assert(!str);
g_free(in);
}
}
/* Unparse @utf8_in, expect @json_out */
str = qstring_from_str(utf8_in);
jstr = to_json_str(str);
g_assert_cmpstr(jstr, ==, json_out);
qobject_unref(str);
g_free(jstr);
/* Parse @json_out right back, unless it has replacements */
if (!strstr(json_out, "\\uFFFD")) {
str = from_json_str(json_out, j, &error_abort);
g_assert_cmpstr(qstring_get_try_str(str), ==, utf8_in);
tests/check-qjson: fix a leak Spotted by ASAN: ================================================================= ==11893==ERROR: LeakSanitizer: detected memory leaks Direct leak of 1120 byte(s) in 28 object(s) allocated from: #0 0x7fd0515b0c48 in malloc (/lib64/libasan.so.5+0xeec48) #1 0x7fd050ffa3c5 in g_malloc (/lib64/libglib-2.0.so.0+0x523c5) #2 0x559e708b56a4 in qstring_from_str /home/elmarco/src/qq/qobject/qstring.c:66 #3 0x559e708b4fe0 in qstring_new /home/elmarco/src/qq/qobject/qstring.c:23 #4 0x559e708bda7d in parse_string /home/elmarco/src/qq/qobject/json-parser.c:143 #5 0x559e708c1009 in parse_literal /home/elmarco/src/qq/qobject/json-parser.c:484 #6 0x559e708c1627 in parse_value /home/elmarco/src/qq/qobject/json-parser.c:547 #7 0x559e708c1c67 in json_parser_parse /home/elmarco/src/qq/qobject/json-parser.c:573 #8 0x559e708bc0ff in json_message_process_token /home/elmarco/src/qq/qobject/json-streamer.c:92 #9 0x559e708d1655 in json_lexer_feed_char /home/elmarco/src/qq/qobject/json-lexer.c:292 #10 0x559e708d1fe1 in json_lexer_feed /home/elmarco/src/qq/qobject/json-lexer.c:339 #11 0x559e708bc856 in json_message_parser_feed /home/elmarco/src/qq/qobject/json-streamer.c:121 #12 0x559e708b8b4b in qobject_from_jsonv /home/elmarco/src/qq/qobject/qjson.c:69 #13 0x559e708b8d02 in qobject_from_json /home/elmarco/src/qq/qobject/qjson.c:83 #14 0x559e708a74ae in from_json_str /home/elmarco/src/qq/tests/check-qjson.c:30 #15 0x559e708a9f83 in utf8_string /home/elmarco/src/qq/tests/check-qjson.c:781 #16 0x7fd05101bc49 in test_case_run gtestutils.c:2255 #17 0x7fd05101bc49 in g_test_run_suite_internal gtestutils.c:2339 Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20180901211917.10372-1-marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-09-02 05:19:17 +08:00
qobject_unref(str);
}
}
}
}
static void simple_number(void)
{
int i;
struct {
const char *encoded;
int64_t decoded;
int skip;
} test_cases[] = {
{ "0", 0 },
{ "1234", 1234 },
{ "1", 1 },
{ "-32", -32 },
{ "-0", 0, .skip = 1 },
{ },
};
for (i = 0; test_cases[i].encoded; i++) {
QNum *qnum;
int64_t val;
qnum = qobject_to(QNum,
qobject_from_json(test_cases[i].encoded,
&error_abort));
g_assert(qnum);
g_assert(qnum_get_try_int(qnum, &val));
g_assert_cmpint(val, ==, test_cases[i].decoded);
if (test_cases[i].skip == 0) {
QString *str;
str = qobject_to_json(QOBJECT(qnum));
g_assert(strcmp(qstring_get_str(str), test_cases[i].encoded) == 0);
qobject_unref(str);
}
qobject_unref(qnum);
}
}
static void large_number(void)
{
const char *maxu64 = "18446744073709551615"; /* 2^64-1 */
const char *gtu64 = "18446744073709551616"; /* 2^64 */
const char *lti64 = "-9223372036854775809"; /* -2^63 - 1 */
QNum *qnum;
QString *str;
uint64_t val;
int64_t ival;
qnum = qobject_to(QNum, qobject_from_json(maxu64, &error_abort));
g_assert(qnum);
g_assert_cmpuint(qnum_get_uint(qnum), ==, 18446744073709551615U);
g_assert(!qnum_get_try_int(qnum, &ival));
str = qobject_to_json(QOBJECT(qnum));
g_assert_cmpstr(qstring_get_str(str), ==, maxu64);
qobject_unref(str);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_json(gtu64, &error_abort));
g_assert(qnum);
g_assert_cmpfloat(qnum_get_double(qnum), ==, 18446744073709552e3);
g_assert(!qnum_get_try_uint(qnum, &val));
g_assert(!qnum_get_try_int(qnum, &ival));
str = qobject_to_json(QOBJECT(qnum));
g_assert_cmpstr(qstring_get_str(str), ==, gtu64);
qobject_unref(str);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_json(lti64, &error_abort));
g_assert(qnum);
g_assert_cmpfloat(qnum_get_double(qnum), ==, -92233720368547758e2);
g_assert(!qnum_get_try_uint(qnum, &val));
g_assert(!qnum_get_try_int(qnum, &ival));
str = qobject_to_json(QOBJECT(qnum));
g_assert_cmpstr(qstring_get_str(str), ==, "-9223372036854775808");
qobject_unref(str);
qobject_unref(qnum);
}
static void float_number(void)
{
int i;
struct {
const char *encoded;
double decoded;
int skip;
} test_cases[] = {
{ "32.43", 32.43 },
{ "0.222", 0.222 },
{ "-32.12313", -32.12313 },
{ "-32.20e-10", -32.20e-10, .skip = 1 },
{ },
};
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QNum *qnum;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
qnum = qobject_to(QNum, obj);
g_assert(qnum);
g_assert(qnum_get_double(qnum) == test_cases[i].decoded);
if (test_cases[i].skip == 0) {
QString *str;
str = qobject_to_json(obj);
g_assert(strcmp(qstring_get_str(str), test_cases[i].encoded) == 0);
qobject_unref(str);
}
qobject_unref(qnum);
}
}
static void keyword_literal(void)
{
QObject *obj;
QBool *qbool;
QNull *null;
QString *str;
obj = qobject_from_json("true", &error_abort);
qbool = qobject_to(QBool, obj);
g_assert(qbool);
g_assert(qbool_get_bool(qbool) == true);
str = qobject_to_json(obj);
g_assert(strcmp(qstring_get_str(str), "true") == 0);
qobject_unref(str);
qobject_unref(qbool);
obj = qobject_from_json("false", &error_abort);
qbool = qobject_to(QBool, obj);
g_assert(qbool);
g_assert(qbool_get_bool(qbool) == false);
str = qobject_to_json(obj);
g_assert(strcmp(qstring_get_str(str), "false") == 0);
qobject_unref(str);
qobject_unref(qbool);
obj = qobject_from_json("null", &error_abort);
g_assert(obj != NULL);
g_assert(qobject_type(obj) == QTYPE_QNULL);
null = qnull();
g_assert(QOBJECT(null) == obj);
qobject_unref(obj);
qobject_unref(null);
}
static void interpolation_valid(void)
{
long long value_lld = 0x123456789abcdefLL;
int64_t value_d64 = value_lld;
long value_ld = (long)value_lld;
int value_d = (int)value_lld;
unsigned long long value_llu = 0xfedcba9876543210ULL;
uint64_t value_u64 = value_llu;
unsigned long value_lu = (unsigned long)value_llu;
unsigned value_u = (unsigned)value_llu;
double value_f = 2.323423423;
const char *value_s = "hello world";
QObject *value_p = QOBJECT(qnull());
QBool *qbool;
QNum *qnum;
QString *qstr;
QObject *qobj;
/* bool */
qbool = qobject_to(QBool, qobject_from_jsonf_nofail("%i", false));
g_assert(qbool);
g_assert(qbool_get_bool(qbool) == false);
qobject_unref(qbool);
json-parser: Accept 'null' in QMP We document that in QMP, the client may send any json-value for the optional "id" key, and then return that same value on reply (both success and failures, insofar as the failure happened after parsing the id). [Note that the output may not be identical to the input, as whitespace may change and since we may reorder keys within a json-object, but that this still constitutes the same json-value]. However, we were not handling the JSON literal null, which counts as a json-value per RFC 7159. Also, down the road, given the QAPI schema of {'*foo':'str'} or {'*foo':'ComplexType'}, we could decide to allow the QMP client to pass { "foo":null } instead of the current representation of { } where omitting the key is the only way to get at the default NULL value. Such a change might be useful for argument introspection (if a type in older qemu lacks 'foo' altogether, then an explicit "foo":null probe will force an easily distinguished error message for whether the optional "foo" key is even understood in newer qemu). And if we add default values to optional arguments, allowing an explicit null would be required for getting a NULL value associated with an optional string that has a non-null default. But all that can come at a later day. The 'check-unit' testsuite is enhanced to test that parsing produces the same object as explicitly requesting a reference to the special qnull object. In addition, I tested with: $ ./x86_64-softmmu/qemu-system-x86_64 -qmp stdio -nodefaults {"QMP": {"version": {"qemu": {"micro": 91, "minor": 2, "major": 2}, "package": ""}, "capabilities": []}} {"execute":"qmp_capabilities","id":null} {"return": {}, "id": null} {"id":{"a":null,"b":[1,null]},"execute":"quit"} {"return": {}, "id": {"a": null, "b": [1, null]}} {"timestamp": {"seconds": 1427742379, "microseconds": 423128}, "event": "SHUTDOWN"} Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-04-30 05:35:06 +08:00
/* Test that non-zero values other than 1 get collapsed to true */
qbool = qobject_to(QBool, qobject_from_jsonf_nofail("%i", 2));
g_assert(qbool);
g_assert(qbool_get_bool(qbool) == true);
qobject_unref(qbool);
json-parser: Accept 'null' in QMP We document that in QMP, the client may send any json-value for the optional "id" key, and then return that same value on reply (both success and failures, insofar as the failure happened after parsing the id). [Note that the output may not be identical to the input, as whitespace may change and since we may reorder keys within a json-object, but that this still constitutes the same json-value]. However, we were not handling the JSON literal null, which counts as a json-value per RFC 7159. Also, down the road, given the QAPI schema of {'*foo':'str'} or {'*foo':'ComplexType'}, we could decide to allow the QMP client to pass { "foo":null } instead of the current representation of { } where omitting the key is the only way to get at the default NULL value. Such a change might be useful for argument introspection (if a type in older qemu lacks 'foo' altogether, then an explicit "foo":null probe will force an easily distinguished error message for whether the optional "foo" key is even understood in newer qemu). And if we add default values to optional arguments, allowing an explicit null would be required for getting a NULL value associated with an optional string that has a non-null default. But all that can come at a later day. The 'check-unit' testsuite is enhanced to test that parsing produces the same object as explicitly requesting a reference to the special qnull object. In addition, I tested with: $ ./x86_64-softmmu/qemu-system-x86_64 -qmp stdio -nodefaults {"QMP": {"version": {"qemu": {"micro": 91, "minor": 2, "major": 2}, "package": ""}, "capabilities": []}} {"execute":"qmp_capabilities","id":null} {"return": {}, "id": null} {"id":{"a":null,"b":[1,null]},"execute":"quit"} {"return": {}, "id": {"a": null, "b": [1, null]}} {"timestamp": {"seconds": 1427742379, "microseconds": 423128}, "event": "SHUTDOWN"} Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-04-30 05:35:06 +08:00
/* number */
json-parser: Accept 'null' in QMP We document that in QMP, the client may send any json-value for the optional "id" key, and then return that same value on reply (both success and failures, insofar as the failure happened after parsing the id). [Note that the output may not be identical to the input, as whitespace may change and since we may reorder keys within a json-object, but that this still constitutes the same json-value]. However, we were not handling the JSON literal null, which counts as a json-value per RFC 7159. Also, down the road, given the QAPI schema of {'*foo':'str'} or {'*foo':'ComplexType'}, we could decide to allow the QMP client to pass { "foo":null } instead of the current representation of { } where omitting the key is the only way to get at the default NULL value. Such a change might be useful for argument introspection (if a type in older qemu lacks 'foo' altogether, then an explicit "foo":null probe will force an easily distinguished error message for whether the optional "foo" key is even understood in newer qemu). And if we add default values to optional arguments, allowing an explicit null would be required for getting a NULL value associated with an optional string that has a non-null default. But all that can come at a later day. The 'check-unit' testsuite is enhanced to test that parsing produces the same object as explicitly requesting a reference to the special qnull object. In addition, I tested with: $ ./x86_64-softmmu/qemu-system-x86_64 -qmp stdio -nodefaults {"QMP": {"version": {"qemu": {"micro": 91, "minor": 2, "major": 2}, "package": ""}, "capabilities": []}} {"execute":"qmp_capabilities","id":null} {"return": {}, "id": null} {"id":{"a":null,"b":[1,null]},"execute":"quit"} {"return": {}, "id": {"a": null, "b": [1, null]}} {"timestamp": {"seconds": 1427742379, "microseconds": 423128}, "event": "SHUTDOWN"} Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-04-30 05:35:06 +08:00
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%d", value_d));
g_assert_cmpint(qnum_get_int(qnum), ==, value_d);
qobject_unref(qnum);
json-parser: Accept 'null' in QMP We document that in QMP, the client may send any json-value for the optional "id" key, and then return that same value on reply (both success and failures, insofar as the failure happened after parsing the id). [Note that the output may not be identical to the input, as whitespace may change and since we may reorder keys within a json-object, but that this still constitutes the same json-value]. However, we were not handling the JSON literal null, which counts as a json-value per RFC 7159. Also, down the road, given the QAPI schema of {'*foo':'str'} or {'*foo':'ComplexType'}, we could decide to allow the QMP client to pass { "foo":null } instead of the current representation of { } where omitting the key is the only way to get at the default NULL value. Such a change might be useful for argument introspection (if a type in older qemu lacks 'foo' altogether, then an explicit "foo":null probe will force an easily distinguished error message for whether the optional "foo" key is even understood in newer qemu). And if we add default values to optional arguments, allowing an explicit null would be required for getting a NULL value associated with an optional string that has a non-null default. But all that can come at a later day. The 'check-unit' testsuite is enhanced to test that parsing produces the same object as explicitly requesting a reference to the special qnull object. In addition, I tested with: $ ./x86_64-softmmu/qemu-system-x86_64 -qmp stdio -nodefaults {"QMP": {"version": {"qemu": {"micro": 91, "minor": 2, "major": 2}, "package": ""}, "capabilities": []}} {"execute":"qmp_capabilities","id":null} {"return": {}, "id": null} {"id":{"a":null,"b":[1,null]},"execute":"quit"} {"return": {}, "id": {"a": null, "b": [1, null]}} {"timestamp": {"seconds": 1427742379, "microseconds": 423128}, "event": "SHUTDOWN"} Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-04-30 05:35:06 +08:00
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%ld", value_ld));
g_assert_cmpint(qnum_get_int(qnum), ==, value_ld);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%lld", value_lld));
g_assert_cmpint(qnum_get_int(qnum), ==, value_lld);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%" PRId64, value_d64));
g_assert_cmpint(qnum_get_int(qnum), ==, value_lld);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%u", value_u));
g_assert_cmpuint(qnum_get_uint(qnum), ==, value_u);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%lu", value_lu));
g_assert_cmpuint(qnum_get_uint(qnum), ==, value_lu);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%llu", value_llu));
g_assert_cmpuint(qnum_get_uint(qnum), ==, value_llu);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%" PRIu64, value_u64));
g_assert_cmpuint(qnum_get_uint(qnum), ==, value_llu);
qobject_unref(qnum);
qnum = qobject_to(QNum, qobject_from_jsonf_nofail("%f", value_f));
g_assert(qnum_get_double(qnum) == value_f);
qobject_unref(qnum);
/* string */
qstr = qobject_to(QString,
qobject_from_jsonf_nofail("%s", value_s));
g_assert_cmpstr(qstring_get_try_str(qstr), ==, value_s);
qobject_unref(qstr);
/* object */
qobj = qobject_from_jsonf_nofail("%p", value_p);
g_assert(qobj == value_p);
}
static void interpolation_unknown(void)
{
if (g_test_subprocess()) {
qobject_from_jsonf_nofail("%x", 666);
}
g_test_trap_subprocess(NULL, 0, 0);
g_test_trap_assert_failed();
g_test_trap_assert_stderr("*Unexpected error*"
"invalid interpolation '%x'*");
}
static void interpolation_string(void)
{
json: Improve safety of qobject_from_jsonf_nofail() & friends The JSON parser optionally supports interpolation. This is used to build QObjects by parsing string templates. The templates are C literals, so parse errors (such as invalid interpolation specifications) are actually programming errors. Consequently, the functions providing parsing with interpolation (qobject_from_jsonf_nofail(), qobject_from_vjsonf_nofail(), qdict_from_jsonf_nofail(), qdict_from_vjsonf_nofail()) pass &error_abort to the parser. However, there's another, more dangerous kind of programming error: since we use va_arg() to get the value to interpolate, behavior is undefined when the variable argument isn't consistent with the interpolation specification. The same problem exists with printf()-like functions, and the solution is to have the compiler check consistency. This is what GCC_FMT_ATTR() is about. To enable this type checking for interpolation as well, we carefully chose our interpolation specifications to match printf conversion specifications, and decorate functions parsing templates with GCC_FMT_ATTR(). Note that this only protects against undefined behavior due to type errors. It can't protect against use of invalid interpolation specifications that happen to be valid printf conversion specifications. However, there's still a gaping hole in the type checking: GCC recognizes '%' as start of printf conversion specification anywhere in the template, but the parser recognizes it only outside JSON strings. For instance, if someone were to pass a "{ '%s': %d }" template, GCC would require a char * and an int argument, but the parser would va_arg() only an int argument, resulting in undefined behavior. Avoid undefined behavior by catching the programming error at run time: have the parser recognize and reject '%' in JSON strings. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180823164025.12553-57-armbru@redhat.com>
2018-08-24 00:40:23 +08:00
if (g_test_subprocess()) {
qobject_from_jsonf_nofail("['%s', %s]", "eins", "zwei");
}
g_test_trap_subprocess(NULL, 0, 0);
g_test_trap_assert_failed();
g_test_trap_assert_stderr("*Unexpected error*"
"can't interpolate into string*");
}
static void simple_dict(void)
{
int i;
struct {
const char *encoded;
QLitObject decoded;
} test_cases[] = {
{
.encoded = "{\"foo\": 42, \"bar\": \"hello world\"}",
.decoded = QLIT_QDICT(((QLitDictEntry[]){
{ "foo", QLIT_QNUM(42) },
{ "bar", QLIT_QSTR("hello world") },
{ }
})),
}, {
.encoded = "{}",
.decoded = QLIT_QDICT(((QLitDictEntry[]){
{ }
})),
}, {
.encoded = "{\"foo\": 43}",
.decoded = QLIT_QDICT(((QLitDictEntry[]){
{ "foo", QLIT_QNUM(43) },
{ }
})),
},
{ }
};
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QString *str;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
str = qobject_to_json(obj);
qobject_unref(obj);
obj = qobject_from_json(qstring_get_str(str), &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
qobject_unref(obj);
qobject_unref(str);
}
}
/*
* this generates json of the form:
* a(0,m) = [0, 1, ..., m-1]
* a(n,m) = {
* 'key0': a(0,m),
* 'key1': a(1,m),
* ...
* 'key(n-1)': a(n-1,m)
* }
*/
static void gen_test_json(GString *gstr, int nest_level_max,
int elem_count)
{
int i;
g_assert(gstr);
if (nest_level_max == 0) {
g_string_append(gstr, "[");
for (i = 0; i < elem_count; i++) {
g_string_append_printf(gstr, "%d", i);
if (i < elem_count - 1) {
g_string_append_printf(gstr, ", ");
}
}
g_string_append(gstr, "]");
return;
}
g_string_append(gstr, "{");
for (i = 0; i < nest_level_max; i++) {
g_string_append_printf(gstr, "'key%d': ", i);
gen_test_json(gstr, i, elem_count);
if (i < nest_level_max - 1) {
g_string_append(gstr, ",");
}
}
g_string_append(gstr, "}");
}
static void large_dict(void)
{
GString *gstr = g_string_new("");
QObject *obj;
gen_test_json(gstr, 10, 100);
obj = qobject_from_json(gstr->str, &error_abort);
g_assert(obj != NULL);
qobject_unref(obj);
g_string_free(gstr, true);
}
static void simple_list(void)
{
int i;
struct {
const char *encoded;
QLitObject decoded;
} test_cases[] = {
{
.encoded = "[43,42]",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(43),
QLIT_QNUM(42),
{ }
})),
},
{
.encoded = "[43]",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(43),
{ }
})),
},
{
.encoded = "[]",
.decoded = QLIT_QLIST(((QLitObject[]){
{ }
})),
},
{
.encoded = "[{}]",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QDICT(((QLitDictEntry[]){
{},
})),
{},
})),
},
{ }
};
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QString *str;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
str = qobject_to_json(obj);
qobject_unref(obj);
obj = qobject_from_json(qstring_get_str(str), &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
qobject_unref(obj);
qobject_unref(str);
}
}
static void simple_whitespace(void)
{
int i;
struct {
const char *encoded;
QLitObject decoded;
} test_cases[] = {
{
.encoded = " [ 43 , 42 ]",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(43),
QLIT_QNUM(42),
{ }
})),
},
{
.encoded = "\t[ 43 , { 'h' : 'b' },\r\n\t[ ], 42 ]\n",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(43),
QLIT_QDICT(((QLitDictEntry[]){
{ "h", QLIT_QSTR("b") },
{ }})),
QLIT_QLIST(((QLitObject[]){
{ }})),
QLIT_QNUM(42),
{ }
})),
},
{
.encoded = " [ 43 , { 'h' : 'b' , 'a' : 32 }, [ ], 42 ]",
.decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(43),
QLIT_QDICT(((QLitDictEntry[]){
{ "h", QLIT_QSTR("b") },
{ "a", QLIT_QNUM(32) },
{ }})),
QLIT_QLIST(((QLitObject[]){
{ }})),
QLIT_QNUM(42),
{ }
})),
},
{ }
};
for (i = 0; test_cases[i].encoded; i++) {
QObject *obj;
QString *str;
obj = qobject_from_json(test_cases[i].encoded, &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
str = qobject_to_json(obj);
qobject_unref(obj);
obj = qobject_from_json(qstring_get_str(str), &error_abort);
g_assert(qlit_equal_qobject(&test_cases[i].decoded, obj));
qobject_unref(obj);
qobject_unref(str);
}
}
static void simple_interpolation(void)
{
QObject *embedded_obj;
QObject *obj;
QLitObject decoded = QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(1),
QLIT_QSTR("100%"),
QLIT_QLIST(((QLitObject[]){
QLIT_QNUM(32),
QLIT_QNUM(42),
{}})),
{}}));
embedded_obj = qobject_from_json("[32, 42]", &error_abort);
g_assert(embedded_obj != NULL);
obj = qobject_from_jsonf_nofail("[%d, '100%%', %p]", 1, embedded_obj);
g_assert(qlit_equal_qobject(&decoded, obj));
qobject_unref(obj);
}
static void empty_input(void)
{
Error *err = NULL;
QObject *obj;
obj = qobject_from_json("", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void blank_input(void)
{
Error *err = NULL;
QObject *obj;
obj = qobject_from_json("\n ", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void junk_input(void)
{
/* Note: junk within strings is covered elsewhere */
Error *err = NULL;
QObject *obj;
obj = qobject_from_json("@", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("{\x01", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("[0\xFF]", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("00", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("[1e", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("truer", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_string(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("\"abc", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_sq_string(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("'abc", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_escape(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("\"abc\\\"", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_array(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("[32", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_array_comma(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("[32,", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void invalid_array_comma(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("[32,}", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_dict(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("{'abc':32", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_dict_comma(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("{'abc':32,", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void invalid_dict_comma(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("{'abc':32,}", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void unterminated_literal(void)
{
Error *err = NULL;
QObject *obj = qobject_from_json("nul", &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static char *make_nest(char *buf, size_t cnt)
{
memset(buf, '[', cnt - 1);
buf[cnt - 1] = '{';
buf[cnt] = '}';
memset(buf + cnt + 1, ']', cnt - 1);
buf[2 * cnt] = 0;
return buf;
}
static void limits_nesting(void)
{
Error *err = NULL;
enum { max_nesting = 1024 }; /* see qobject/json-streamer.c */
char buf[2 * (max_nesting + 1) + 1];
QObject *obj;
obj = qobject_from_json(make_nest(buf, max_nesting), &error_abort);
g_assert(obj != NULL);
qobject_unref(obj);
obj = qobject_from_json(make_nest(buf, max_nesting + 1), &err);
error_free_or_abort(&err);
g_assert(obj == NULL);
}
static void multiple_values(void)
{
Error *err = NULL;
QObject *obj;
obj = qobject_from_json("false true", &err);
qjson: Fix qobject_from_json() & friends for multiple values qobject_from_json() & friends use the consume_json() callback to receive either a value or an error from the parser. When they are fed a string that contains more than either one JSON value or one JSON syntax error, consume_json() gets called multiple times. When the last call receives a value, qobject_from_json() returns that value. Any other values are leaked. When any call receives an error, qobject_from_json() sets the first error received. Any other errors are thrown away. When values follow errors, qobject_from_json() returns both a value and sets an error. That's bad. Impact: * block.c's parse_json_protocol() ignores and leaks the value. It's used to to parse pseudo-filenames starting with "json:". The pseudo-filenames can come from the user or from image meta-data such as a QCOW2 image's backing file name. * vl.c's parse_display_qapi() ignores and leaks the error. It's used to parse the argument of command line option -display. * vl.c's main() case QEMU_OPTION_blockdev ignores the error and leaves it in @err. main() will then pass a pointer to a non-null Error * to net_init_clients(), which is forbidden. It can lead to assertion failure or other misbehavior. * check-qjson.c's multiple_values() demonstrates the badness. * The other callers are not affected since they only pass strings with exactly one JSON value or, in the case of negative tests, one error. The impact on the _nofail() functions is relatively harmless. They abort when any call receives an error. Else they return the last value, and leak the others, if any. Fix consume_json() as follows. On the first call, save value and error as before. On subsequent calls, if any, don't save them. If the first call saved a value, the next call, if any, replaces the value by an "Expecting at most one JSON value" error. Take care not to leak values or errors that aren't saved. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180823164025.12553-44-armbru@redhat.com>
2018-08-24 00:40:10 +08:00
error_free_or_abort(&err);
g_assert(obj == NULL);
obj = qobject_from_json("} true", &err);
error_free_or_abort(&err);
qjson: Fix qobject_from_json() & friends for multiple values qobject_from_json() & friends use the consume_json() callback to receive either a value or an error from the parser. When they are fed a string that contains more than either one JSON value or one JSON syntax error, consume_json() gets called multiple times. When the last call receives a value, qobject_from_json() returns that value. Any other values are leaked. When any call receives an error, qobject_from_json() sets the first error received. Any other errors are thrown away. When values follow errors, qobject_from_json() returns both a value and sets an error. That's bad. Impact: * block.c's parse_json_protocol() ignores and leaks the value. It's used to to parse pseudo-filenames starting with "json:". The pseudo-filenames can come from the user or from image meta-data such as a QCOW2 image's backing file name. * vl.c's parse_display_qapi() ignores and leaks the error. It's used to parse the argument of command line option -display. * vl.c's main() case QEMU_OPTION_blockdev ignores the error and leaves it in @err. main() will then pass a pointer to a non-null Error * to net_init_clients(), which is forbidden. It can lead to assertion failure or other misbehavior. * check-qjson.c's multiple_values() demonstrates the badness. * The other callers are not affected since they only pass strings with exactly one JSON value or, in the case of negative tests, one error. The impact on the _nofail() functions is relatively harmless. They abort when any call receives an error. Else they return the last value, and leak the others, if any. Fix consume_json() as follows. On the first call, save value and error as before. On subsequent calls, if any, don't save them. If the first call saved a value, the next call, if any, replaces the value by an "Expecting at most one JSON value" error. Take care not to leak values or errors that aren't saved. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20180823164025.12553-44-armbru@redhat.com>
2018-08-24 00:40:10 +08:00
g_assert(obj == NULL);
}
int main(int argc, char **argv)
{
g_test_init(&argc, &argv, NULL);
g_test_add_func("/literals/string/escaped", escaped_string);
g_test_add_func("/literals/string/quotes", string_with_quotes);
g_test_add_func("/literals/string/utf8", utf8_string);
g_test_add_func("/literals/number/simple", simple_number);
g_test_add_func("/literals/number/large", large_number);
g_test_add_func("/literals/number/float", float_number);
g_test_add_func("/literals/keyword", keyword_literal);
g_test_add_func("/literals/interpolation/valid", interpolation_valid);
g_test_add_func("/literals/interpolation/unkown", interpolation_unknown);
g_test_add_func("/literals/interpolation/string", interpolation_string);
g_test_add_func("/dicts/simple_dict", simple_dict);
g_test_add_func("/dicts/large_dict", large_dict);
g_test_add_func("/lists/simple_list", simple_list);
g_test_add_func("/mixed/simple_whitespace", simple_whitespace);
g_test_add_func("/mixed/interpolation", simple_interpolation);
g_test_add_func("/errors/empty", empty_input);
g_test_add_func("/errors/blank", blank_input);
g_test_add_func("/errors/junk", junk_input);
g_test_add_func("/errors/unterminated/string", unterminated_string);
g_test_add_func("/errors/unterminated/escape", unterminated_escape);
g_test_add_func("/errors/unterminated/sq_string", unterminated_sq_string);
g_test_add_func("/errors/unterminated/array", unterminated_array);
g_test_add_func("/errors/unterminated/array_comma", unterminated_array_comma);
g_test_add_func("/errors/unterminated/dict", unterminated_dict);
g_test_add_func("/errors/unterminated/dict_comma", unterminated_dict_comma);
g_test_add_func("/errors/invalid_array_comma", invalid_array_comma);
g_test_add_func("/errors/invalid_dict_comma", invalid_dict_comma);
g_test_add_func("/errors/unterminated/literal", unterminated_literal);
g_test_add_func("/errors/limits/nesting", limits_nesting);
g_test_add_func("/errors/multiple_values", multiple_values);
return g_test_run();
}