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Merge pull request #344 from DaveGamble/release-1.7.11

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Release 1.7.11
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Max Bruckner 2019-04-15 00:17:19 +02:00 committed by GitHub
commit 93688cbe72
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7 changed files with 264 additions and 54 deletions
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7
CHANGELOG.md
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@ -1,3 +1,10 @@
1.7.11
======
Fixes:
------
* Fix a bug where cJSON_Minify could overflow it's buffer, both reading and writing. This is a security issue. (see #338). Big thanks @bigric3 for reporting.
* Unset `true` and `false` macros before setting them if they exist. See #339, thanks @raiden00pl for reporting
1.7.10
======
Fixes:

2
CMakeLists.txt
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@ -7,7 +7,7 @@ include(GNUInstallDirs)
set(PROJECT_VERSION_MAJOR 1)
set(PROJECT_VERSION_MINOR 7)
set(PROJECT_VERSION_PATCH 10)
set(PROJECT_VERSION_PATCH 11)
set(CJSON_VERSION_SO 1)
set(CJSON_UTILS_VERSION_SO 1)
set(PROJECT_VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}")

2
Makefile
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@ -8,7 +8,7 @@ CJSON_TEST_SRC = cJSON.c test.c
LDLIBS = -lm
LIBVERSION = 1.7.10
LIBVERSION = 1.7.11
CJSON_SOVERSION = 1
UTILS_SOVERSION = 1

137
cJSON.c
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@ -58,7 +58,14 @@
#include "cJSON.h"
/* define our own boolean type */
#ifdef true
#undef true
#endif
#define true ((cJSON_bool)1)
#ifdef false
#undef false
#endif
#define false ((cJSON_bool)0)
typedef struct {
@ -81,7 +88,7 @@ CJSON_PUBLIC(char *) cJSON_GetStringValue(cJSON *item) {
}
/* This is a safeguard to prevent copy-pasters from using incompatible C and header files */
#if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 7) || (CJSON_VERSION_PATCH != 10)
#if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 7) || (CJSON_VERSION_PATCH != 11)
#error cJSON.h and cJSON.c have different versions. Make sure that both have the same.
#endif
@ -144,6 +151,9 @@ static void * CJSON_CDECL internal_realloc(void *pointer, size_t size)
#define internal_realloc realloc
#endif
/* strlen of character literals resolved at compile time */
#define static_strlen(string_literal) (sizeof(string_literal) - sizeof(""))
static internal_hooks global_hooks = { internal_malloc, internal_free, internal_realloc };
static unsigned char* cJSON_strdup(const unsigned char* string, const internal_hooks * const hooks)
@ -2630,69 +2640,94 @@ fail:
return NULL;
}
static void skip_oneline_comment(char **input)
{
*input += static_strlen("//");
for (; (*input)[0] != '\0'; ++(*input))
{
if ((*input)[0] == '\n') {
*input += static_strlen("\n");
return;
}
}
}
static void skip_multiline_comment(char **input)
{
*input += static_strlen("/*");
for (; (*input)[0] != '\0'; ++(*input))
{
if (((*input)[0] == '*') && ((*input)[1] == '/'))
{
*input += static_strlen("*/");
return;
}
}
}
static void minify_string(char **input, char **output) {
(*output)[0] = (*input)[0];
*input += static_strlen("\"");
*output += static_strlen("\"");
for (; (*input)[0] != '\0'; (void)++(*input), ++(*output)) {
(*output)[0] = (*input)[0];
if ((*input)[0] == '\"') {
(*output)[0] = '\"';
*input += static_strlen("\"");
*output += static_strlen("\"");
return;
} else if (((*input)[0] == '\\') && ((*input)[1] == '\"')) {
(*output)[1] = (*input)[1];
*input += static_strlen("\"");
*output += static_strlen("\"");
}
}
}
CJSON_PUBLIC(void) cJSON_Minify(char *json)
{
unsigned char *into = (unsigned char*)json;
char *into = json;
if (json == NULL)
{
return;
}
while (*json)
while (json[0] != '\0')
{
if (*json == ' ')
switch (json[0])
{
json++;
}
else if (*json == '\t')
{
/* Whitespace characters. */
json++;
}
else if (*json == '\r')
{
json++;
}
else if (*json=='\n')
{
json++;
}
else if ((*json == '/') && (json[1] == '/'))
{
/* double-slash comments, to end of line. */
while (*json && (*json != '\n'))
{
case ' ':
case '\t':
case '\r':
case '\n':
json++;
}
}
else if ((*json == '/') && (json[1] == '*'))
{
/* multiline comments. */
while (*json && !((*json == '*') && (json[1] == '/')))
{
json++;
}
json += 2;
}
else if (*json == '\"')
{
/* string literals, which are \" sensitive. */
*into++ = (unsigned char)*json++;
while (*json && (*json != '\"'))
{
if (*json == '\\')
break;
case '/':
if (json[1] == '/')
{
*into++ = (unsigned char)*json++;
skip_oneline_comment(&json);
}
*into++ = (unsigned char)*json++;
}
*into++ = (unsigned char)*json++;
}
else
{
/* All other characters. */
*into++ = (unsigned char)*json++;
else if (json[1] == '*')
{
skip_multiline_comment(&json);
}
break;
case '\"':
minify_string(&json, (char**)&into);
break;
default:
into[0] = json[0];
json++;
into++;
}
}

2
cJSON.h
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@ -81,7 +81,7 @@ then using the CJSON_API_VISIBILITY flag to "export" the same symbols the way CJ
/* project version */
#define CJSON_VERSION_MAJOR 1
#define CJSON_VERSION_MINOR 7
#define CJSON_VERSION_PATCH 10
#define CJSON_VERSION_PATCH 11
#include <stddef.h>

1
tests/CMakeLists.txt
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@ -57,6 +57,7 @@ if(ENABLE_CJSON_TEST)
compare_tests
cjson_add
readme_examples
minify_tests
)
option(ENABLE_VALGRIND OFF "Enable the valgrind memory checker for the tests.")

167
tests/minify_tests.c Normal file
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@ -0,0 +1,167 @@
/*
Copyright (c) 2009-2019 Dave Gamble and cJSON contributors
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "unity/examples/unity_config.h"
#include "unity/src/unity.h"
#include "common.h"
static void cjson_minify_should_not_overflow_buffer(void)
{
char unclosed_multiline_comment[] = "/* bla";
char pending_escape[] = "\"\\";
cJSON_Minify(unclosed_multiline_comment);
TEST_ASSERT_EQUAL_STRING("", unclosed_multiline_comment);
cJSON_Minify(pending_escape);
TEST_ASSERT_EQUAL_STRING("\"\\", pending_escape);
}
static void cjson_minify_should_remove_single_line_comments(void)
{
const char to_minify[] = "{// this is {} \"some kind\" of [] comment /*, don't you see\n}";
char* minified = (char*) malloc(sizeof(to_minify));
TEST_ASSERT_NOT_NULL(minified);
strcpy(minified, to_minify);
cJSON_Minify(minified);
TEST_ASSERT_EQUAL_STRING("{}", minified);
free(minified);
}
static void cjson_minify_should_remove_spaces(void)
{
const char to_minify[] = "{ \"key\":\ttrue\r\n }";
char* minified = (char*) malloc(sizeof(to_minify));
TEST_ASSERT_NOT_NULL(minified);
strcpy(minified, to_minify);
cJSON_Minify(minified);
TEST_ASSERT_EQUAL_STRING("{\"key\":true}", minified);
free(minified);
}
static void cjson_minify_should_remove_multiline_comments(void)
{
const char to_minify[] = "{/* this is\n a /* multi\n //line \n {comment \"\\\" */}";
char* minified = (char*) malloc(sizeof(to_minify));
TEST_ASSERT_NOT_NULL(minified);
strcpy(minified, to_minify);
cJSON_Minify(minified);
TEST_ASSERT_EQUAL_STRING("{}", minified);
free(minified);
}
static void cjson_minify_should_not_modify_strings(void)
{
const char to_minify[] = "\"this is a string \\\" \\t bla\"";
char* minified = (char*) malloc(sizeof(to_minify));
TEST_ASSERT_NOT_NULL(minified);
strcpy(minified, to_minify);
cJSON_Minify(minified);
TEST_ASSERT_EQUAL_STRING(to_minify, minified);
free(minified);
}
static void cjson_minify_should_minify_json(void) {
const char to_minify[] =
"{\n"
" \"glossary\": { // comment\n"
" \"title\": \"example glossary\",\n"
" /* multi\n"
" line */\n"
" \"GlossDiv\": {\n"
" \"title\": \"S\",\n"
" \"GlossList\": {\n"
" \"GlossEntry\": {\n"
" \"ID\": \"SGML\",\n"
" \"SortAs\": \"SGML\",\n"
" \"Acronym\": \"SGML\",\n"
" \"Abbrev\": \"ISO 8879:1986\",\n"
" \"GlossDef\": {\n"
" \"GlossSeeAlso\": [\"GML\", \"XML\"]\n"
" },\n"
" \"GlossSee\": \"markup\"\n"
" }\n"
" }\n"
" }\n"
" }\n"
"}";
const char* minified =
"{"
"\"glossary\":{"
"\"title\":\"example glossary\","
"\"GlossDiv\":{"
"\"title\":\"S\","
"\"GlossList\":{"
"\"GlossEntry\":{"
"\"ID\":\"SGML\","
"\"SortAs\":\"SGML\","
"\"Acronym\":\"SGML\","
"\"Abbrev\":\"ISO 8879:1986\","
"\"GlossDef\":{"
"\"GlossSeeAlso\":[\"GML\",\"XML\"]"
"},"
"\"GlossSee\":\"markup\""
"}"
"}"
"}"
"}"
"}";
char *buffer = (char*) malloc(sizeof(to_minify));
strcpy(buffer, to_minify);
cJSON_Minify(buffer);
TEST_ASSERT_EQUAL_STRING(minified, buffer);
free(buffer);
}
int CJSON_CDECL main(void)
{
UNITY_BEGIN();
RUN_TEST(cjson_minify_should_not_overflow_buffer);
RUN_TEST(cjson_minify_should_minify_json);
RUN_TEST(cjson_minify_should_remove_single_line_comments);
RUN_TEST(cjson_minify_should_remove_multiline_comments);
RUN_TEST(cjson_minify_should_remove_spaces);
RUN_TEST(cjson_minify_should_not_modify_strings);
return UNITY_END();
}