mirror of
https://github.com/DaveGamble/cJSON.git
synced 2023-08-10 21:13:26 +03:00
954d61e5e7
If realloc returns NULL, ensure didn't abort but returned printbuffer.offset instead. If an attacker can control printbuffer.offset and also make realloc fail at just the right moment, this would make cJSON potentially write at an arbitrary memory address.
447 lines
17 KiB
C
447 lines
17 KiB
C
/*
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Copyright (c) 2009-2017 Dave Gamble and cJSON contributors
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "unity/examples/unity_config.h"
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#include "unity/src/unity.h"
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#include "common.h"
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static void cjson_array_foreach_should_loop_over_arrays(void)
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{
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cJSON array[1];
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cJSON elements[10];
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cJSON *element_pointer = NULL;
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size_t i = 0;
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memset(array, 0, sizeof(array));
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memset(elements, 0, sizeof(elements));
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/* create array */
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array[0].child = &elements[0];
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elements[0].prev = NULL;
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elements[9].next = NULL;
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for (i = 0; i < 9; i++)
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{
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elements[i].next = &elements[i + 1];
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elements[i + 1].prev = &elements[i];
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}
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i = 0;
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cJSON_ArrayForEach(element_pointer, array)
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{
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TEST_ASSERT_TRUE_MESSAGE(element_pointer == &elements[i], "Not iterating over array properly");
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i++;
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}
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}
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static void cjson_array_foreach_should_not_dereference_null_pointer(void)
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{
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cJSON *array = NULL;
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cJSON *element = NULL;
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cJSON_ArrayForEach(element, array);
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}
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static void cjson_get_object_item_should_get_object_items(void)
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{
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cJSON *item = NULL;
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cJSON *found = NULL;
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item = cJSON_Parse("{\"one\":1, \"Two\":2, \"tHree\":3}");
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found = cJSON_GetObjectItem(NULL, "test");
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TEST_ASSERT_NULL_MESSAGE(found, "Failed to fail on NULL pointer.");
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found = cJSON_GetObjectItem(item, NULL);
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TEST_ASSERT_NULL_MESSAGE(found, "Failed to fail on NULL string.");
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found = cJSON_GetObjectItem(item, "one");
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TEST_ASSERT_NOT_NULL_MESSAGE(found, "Failed to find first item.");
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TEST_ASSERT_EQUAL_DOUBLE(found->valuedouble, 1);
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found = cJSON_GetObjectItem(item, "tWo");
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TEST_ASSERT_NOT_NULL_MESSAGE(found, "Failed to find first item.");
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TEST_ASSERT_EQUAL_DOUBLE(found->valuedouble, 2);
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found = cJSON_GetObjectItem(item, "three");
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TEST_ASSERT_NOT_NULL_MESSAGE(found, "Failed to find item.");
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TEST_ASSERT_EQUAL_DOUBLE(found->valuedouble, 3);
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found = cJSON_GetObjectItem(item, "four");
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TEST_ASSERT_NULL_MESSAGE(found, "Should not find something that isn't there.");
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cJSON_Delete(item);
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}
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static void cjson_get_object_item_case_sensitive_should_get_object_items(void)
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{
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cJSON *item = NULL;
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cJSON *found = NULL;
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item = cJSON_Parse("{\"one\":1, \"Two\":2, \"tHree\":3}");
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found = cJSON_GetObjectItemCaseSensitive(NULL, "test");
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TEST_ASSERT_NULL_MESSAGE(found, "Failed to fail on NULL pointer.");
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found = cJSON_GetObjectItemCaseSensitive(item, NULL);
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TEST_ASSERT_NULL_MESSAGE(found, "Failed to fail on NULL string.");
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found = cJSON_GetObjectItemCaseSensitive(item, "one");
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TEST_ASSERT_NOT_NULL_MESSAGE(found, "Failed to find first item.");
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TEST_ASSERT_EQUAL_DOUBLE(found->valuedouble, 1);
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found = cJSON_GetObjectItemCaseSensitive(item, "Two");
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TEST_ASSERT_NOT_NULL_MESSAGE(found, "Failed to find first item.");
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TEST_ASSERT_EQUAL_DOUBLE(found->valuedouble, 2);
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found = cJSON_GetObjectItemCaseSensitive(item, "tHree");
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TEST_ASSERT_NOT_NULL_MESSAGE(found, "Failed to find item.");
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TEST_ASSERT_EQUAL_DOUBLE(found->valuedouble, 3);
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found = cJSON_GetObjectItemCaseSensitive(item, "One");
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TEST_ASSERT_NULL_MESSAGE(found, "Should not find something that isn't there.");
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cJSON_Delete(item);
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}
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static void typecheck_functions_should_check_type(void)
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{
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cJSON invalid[1];
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cJSON item[1];
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invalid->type = cJSON_Invalid;
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invalid->type |= cJSON_StringIsConst;
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item->type = cJSON_False;
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item->type |= cJSON_StringIsConst;
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TEST_ASSERT_FALSE(cJSON_IsInvalid(NULL));
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TEST_ASSERT_FALSE(cJSON_IsInvalid(item));
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TEST_ASSERT_TRUE(cJSON_IsInvalid(invalid));
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item->type = cJSON_False | cJSON_StringIsConst;
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TEST_ASSERT_FALSE(cJSON_IsFalse(NULL));
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TEST_ASSERT_FALSE(cJSON_IsFalse(invalid));
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TEST_ASSERT_TRUE(cJSON_IsFalse(item));
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TEST_ASSERT_TRUE(cJSON_IsBool(item));
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item->type = cJSON_True | cJSON_StringIsConst;
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TEST_ASSERT_FALSE(cJSON_IsTrue(NULL));
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TEST_ASSERT_FALSE(cJSON_IsTrue(invalid));
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TEST_ASSERT_TRUE(cJSON_IsTrue(item));
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TEST_ASSERT_TRUE(cJSON_IsBool(item));
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item->type = cJSON_NULL | cJSON_StringIsConst;
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TEST_ASSERT_FALSE(cJSON_IsNull(NULL));
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TEST_ASSERT_FALSE(cJSON_IsNull(invalid));
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TEST_ASSERT_TRUE(cJSON_IsNull(item));
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item->type = cJSON_Number | cJSON_StringIsConst;
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TEST_ASSERT_FALSE(cJSON_IsNumber(NULL));
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TEST_ASSERT_FALSE(cJSON_IsNumber(invalid));
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TEST_ASSERT_TRUE(cJSON_IsNumber(item));
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item->type = cJSON_String | cJSON_StringIsConst;
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TEST_ASSERT_FALSE(cJSON_IsString(NULL));
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TEST_ASSERT_FALSE(cJSON_IsString(invalid));
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TEST_ASSERT_TRUE(cJSON_IsString(item));
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item->type = cJSON_Array | cJSON_StringIsConst;
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TEST_ASSERT_FALSE(cJSON_IsArray(NULL));
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TEST_ASSERT_FALSE(cJSON_IsArray(invalid));
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TEST_ASSERT_TRUE(cJSON_IsArray(item));
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item->type = cJSON_Object | cJSON_StringIsConst;
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TEST_ASSERT_FALSE(cJSON_IsObject(NULL));
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TEST_ASSERT_FALSE(cJSON_IsObject(invalid));
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TEST_ASSERT_TRUE(cJSON_IsObject(item));
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item->type = cJSON_Raw | cJSON_StringIsConst;
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TEST_ASSERT_FALSE(cJSON_IsRaw(NULL));
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TEST_ASSERT_FALSE(cJSON_IsRaw(invalid));
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TEST_ASSERT_TRUE(cJSON_IsRaw(item));
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}
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static void cjson_should_not_parse_to_deeply_nested_jsons(void)
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{
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char deep_json[CJSON_NESTING_LIMIT + 1];
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size_t position = 0;
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for (position = 0; position < sizeof(deep_json); position++)
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{
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deep_json[position] = '[';
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}
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deep_json[sizeof(deep_json) - 1] = '\0';
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TEST_ASSERT_NULL_MESSAGE(cJSON_Parse(deep_json), "To deep JSONs should not be parsed.");
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}
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static void cjson_set_number_value_should_set_numbers(void)
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{
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cJSON number[1] = {{NULL, NULL, NULL, cJSON_Number, NULL, 0, 0, NULL}};
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cJSON_SetNumberValue(number, 1.5);
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TEST_ASSERT_EQUAL(1, number->valueint);
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TEST_ASSERT_EQUAL_DOUBLE(1.5, number->valuedouble);
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cJSON_SetNumberValue(number, -1.5);
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TEST_ASSERT_EQUAL(-1, number->valueint);
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TEST_ASSERT_EQUAL_DOUBLE(-1.5, number->valuedouble);
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cJSON_SetNumberValue(number, 1 + (double)INT_MAX);
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TEST_ASSERT_EQUAL(INT_MAX, number->valueint);
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TEST_ASSERT_EQUAL_DOUBLE(1 + (double)INT_MAX, number->valuedouble);
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cJSON_SetNumberValue(number, -1 + (double)INT_MIN);
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TEST_ASSERT_EQUAL(INT_MIN, number->valueint);
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TEST_ASSERT_EQUAL_DOUBLE(-1 + (double)INT_MIN, number->valuedouble);
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}
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static void cjson_detach_item_via_pointer_should_detach_items(void)
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{
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cJSON list[4];
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cJSON parent[1];
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memset(list, '\0', sizeof(list));
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/* link the list */
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list[0].next = &(list[1]);
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list[1].next = &(list[2]);
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list[2].next = &(list[3]);
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list[3].prev = &(list[2]);
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list[2].prev = &(list[1]);
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list[1].prev = &(list[0]);
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parent->child = &list[0];
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/* detach in the middle (list[1]) */
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TEST_ASSERT_TRUE_MESSAGE(cJSON_DetachItemViaPointer(parent, &(list[1])) == &(list[1]), "Failed to detach in the middle.");
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TEST_ASSERT_TRUE_MESSAGE((list[1].prev == NULL) && (list[1].next == NULL), "Didn't set pointers of detached item to NULL.");
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TEST_ASSERT_TRUE((list[0].next == &(list[2])) && (list[2].prev == &(list[0])));
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/* detach beginning (list[0]) */
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TEST_ASSERT_TRUE_MESSAGE(cJSON_DetachItemViaPointer(parent, &(list[0])) == &(list[0]), "Failed to detach beginning.");
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TEST_ASSERT_TRUE_MESSAGE((list[0].prev == NULL) && (list[0].next == NULL), "Didn't set pointers of detached item to NULL.");
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TEST_ASSERT_TRUE_MESSAGE((list[2].prev == NULL) && (parent->child == &(list[2])), "Didn't set the new beginning.");
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/* detach end (list[3])*/
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TEST_ASSERT_TRUE_MESSAGE(cJSON_DetachItemViaPointer(parent, &(list[3])) == &(list[3]), "Failed to detach end.");
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TEST_ASSERT_TRUE_MESSAGE((list[3].prev == NULL) && (list[3].next == NULL), "Didn't set pointers of detached item to NULL.");
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TEST_ASSERT_TRUE_MESSAGE((list[2].next == NULL) && (parent->child == &(list[2])), "Didn't set the new end");
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/* detach single item (list[2]) */
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TEST_ASSERT_TRUE_MESSAGE(cJSON_DetachItemViaPointer(parent, &list[2]) == &list[2], "Failed to detach single item.");
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TEST_ASSERT_TRUE_MESSAGE((list[2].prev == NULL) && (list[2].next == NULL), "Didn't set pointers of detached item to NULL.");
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TEST_ASSERT_NULL_MESSAGE(parent->child, "Child of the parent wasn't set to NULL.");
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}
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static void cjson_replace_item_via_pointer_should_replace_items(void)
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{
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cJSON replacements[3];
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cJSON *beginning = NULL;
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cJSON *middle = NULL;
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cJSON *end = NULL;
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cJSON *array = NULL;
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beginning = cJSON_CreateNull();
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TEST_ASSERT_NOT_NULL(beginning);
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middle = cJSON_CreateNull();
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TEST_ASSERT_NOT_NULL(middle);
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end = cJSON_CreateNull();
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TEST_ASSERT_NOT_NULL(end);
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array = cJSON_CreateArray();
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TEST_ASSERT_NOT_NULL(array);
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cJSON_AddItemToArray(array, beginning);
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cJSON_AddItemToArray(array, middle);
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cJSON_AddItemToArray(array, end);
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memset(replacements, '\0', sizeof(replacements));
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/* replace beginning */
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TEST_ASSERT_TRUE(cJSON_ReplaceItemViaPointer(array, beginning, &(replacements[0])));
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TEST_ASSERT_NULL(replacements[0].prev);
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TEST_ASSERT_TRUE(replacements[0].next == middle);
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TEST_ASSERT_TRUE(middle->prev == &(replacements[0]));
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TEST_ASSERT_TRUE(array->child == &(replacements[0]));
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/* replace middle */
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TEST_ASSERT_TRUE(cJSON_ReplaceItemViaPointer(array, middle, &(replacements[1])));
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TEST_ASSERT_TRUE(replacements[1].prev == &(replacements[0]));
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TEST_ASSERT_TRUE(replacements[1].next == end);
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TEST_ASSERT_TRUE(end->prev == &(replacements[1]));
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/* replace end */
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TEST_ASSERT_TRUE(cJSON_ReplaceItemViaPointer(array, end, &(replacements[2])));
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TEST_ASSERT_TRUE(replacements[2].prev == &(replacements[1]));
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TEST_ASSERT_NULL(replacements[2].next);
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TEST_ASSERT_TRUE(replacements[1].next == &(replacements[2]));
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cJSON_free(array);
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}
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static void cjson_replace_item_in_object_should_preserve_name(void)
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{
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cJSON root[1] = {{ NULL, NULL, NULL, 0, NULL, 0, 0, NULL }};
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cJSON *child = NULL;
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cJSON *replacement = NULL;
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child = cJSON_CreateNumber(1);
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TEST_ASSERT_NOT_NULL(child);
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replacement = cJSON_CreateNumber(2);
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TEST_ASSERT_NOT_NULL(replacement);
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cJSON_AddItemToObject(root, "child", child);
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cJSON_ReplaceItemInObject(root, "child", replacement);
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TEST_ASSERT_TRUE(root->child == replacement);
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TEST_ASSERT_EQUAL_STRING("child", replacement->string);
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cJSON_Delete(replacement);
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}
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static void cjson_functions_shouldnt_crash_with_null_pointers(void)
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{
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char buffer[10];
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cJSON *item = cJSON_CreateString("item");
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cJSON_InitHooks(NULL);
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TEST_ASSERT_NULL(cJSON_Parse(NULL));
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TEST_ASSERT_NULL(cJSON_ParseWithOpts(NULL, NULL, true));
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TEST_ASSERT_NULL(cJSON_Print(NULL));
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TEST_ASSERT_NULL(cJSON_PrintUnformatted(NULL));
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TEST_ASSERT_NULL(cJSON_PrintBuffered(NULL, 10, true));
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TEST_ASSERT_FALSE(cJSON_PrintPreallocated(NULL, buffer, sizeof(buffer), true));
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TEST_ASSERT_FALSE(cJSON_PrintPreallocated(item, NULL, 1, true));
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cJSON_Delete(NULL);
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cJSON_GetArraySize(NULL);
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TEST_ASSERT_NULL(cJSON_GetArrayItem(NULL, 0));
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TEST_ASSERT_NULL(cJSON_GetObjectItem(NULL, "item"));
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TEST_ASSERT_NULL(cJSON_GetObjectItem(item, NULL));
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TEST_ASSERT_NULL(cJSON_GetObjectItemCaseSensitive(NULL, "item"));
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TEST_ASSERT_NULL(cJSON_GetObjectItemCaseSensitive(item, NULL));
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TEST_ASSERT_FALSE(cJSON_HasObjectItem(NULL, "item"));
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TEST_ASSERT_FALSE(cJSON_HasObjectItem(item, NULL));
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TEST_ASSERT_FALSE(cJSON_IsInvalid(NULL));
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TEST_ASSERT_FALSE(cJSON_IsFalse(NULL));
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TEST_ASSERT_FALSE(cJSON_IsTrue(NULL));
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TEST_ASSERT_FALSE(cJSON_IsBool(NULL));
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TEST_ASSERT_FALSE(cJSON_IsNull(NULL));
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TEST_ASSERT_FALSE(cJSON_IsNumber(NULL));
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TEST_ASSERT_FALSE(cJSON_IsString(NULL));
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TEST_ASSERT_FALSE(cJSON_IsArray(NULL));
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TEST_ASSERT_FALSE(cJSON_IsObject(NULL));
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TEST_ASSERT_FALSE(cJSON_IsRaw(NULL));
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TEST_ASSERT_NULL(cJSON_CreateString(NULL));
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TEST_ASSERT_NULL(cJSON_CreateRaw(NULL));
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TEST_ASSERT_NULL(cJSON_CreateIntArray(NULL, 10));
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TEST_ASSERT_NULL(cJSON_CreateFloatArray(NULL, 10));
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TEST_ASSERT_NULL(cJSON_CreateDoubleArray(NULL, 10));
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TEST_ASSERT_NULL(cJSON_CreateStringArray(NULL, 10));
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cJSON_AddItemToArray(NULL, item);
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cJSON_AddItemToArray(item, NULL);
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cJSON_AddItemToObject(item, "item", NULL);
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cJSON_AddItemToObject(item, NULL, item);
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cJSON_AddItemToObject(NULL, "item", item);
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cJSON_AddItemToObjectCS(item, "item", NULL);
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cJSON_AddItemToObjectCS(item, NULL, item);
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cJSON_AddItemToObjectCS(NULL, "item", item);
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cJSON_AddItemReferenceToArray(NULL, item);
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cJSON_AddItemReferenceToArray(item, NULL);
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cJSON_AddItemReferenceToObject(item, "item", NULL);
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cJSON_AddItemReferenceToObject(item, NULL, item);
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cJSON_AddItemReferenceToObject(NULL, "item", item);
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TEST_ASSERT_NULL(cJSON_DetachItemViaPointer(NULL, item));
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TEST_ASSERT_NULL(cJSON_DetachItemViaPointer(item, NULL));
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TEST_ASSERT_NULL(cJSON_DetachItemFromArray(NULL, 0));
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cJSON_DeleteItemFromArray(NULL, 0);
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TEST_ASSERT_NULL(cJSON_DetachItemFromObject(NULL, "item"));
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TEST_ASSERT_NULL(cJSON_DetachItemFromObject(item, NULL));
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TEST_ASSERT_NULL(cJSON_DetachItemFromObjectCaseSensitive(NULL, "item"));
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TEST_ASSERT_NULL(cJSON_DetachItemFromObjectCaseSensitive(item, NULL));
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cJSON_DeleteItemFromObject(NULL, "item");
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cJSON_DeleteItemFromObject(item, NULL);
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cJSON_DeleteItemFromObjectCaseSensitive(NULL, "item");
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cJSON_DeleteItemFromObjectCaseSensitive(item, NULL);
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cJSON_InsertItemInArray(NULL, 0, item);
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cJSON_InsertItemInArray(item, 0, NULL);
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TEST_ASSERT_FALSE(cJSON_ReplaceItemViaPointer(NULL, item, item));
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TEST_ASSERT_FALSE(cJSON_ReplaceItemViaPointer(item, NULL, item));
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TEST_ASSERT_FALSE(cJSON_ReplaceItemViaPointer(item, item, NULL));
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cJSON_ReplaceItemInArray(item, 0, NULL);
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cJSON_ReplaceItemInArray(NULL, 0, item);
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cJSON_ReplaceItemInObject(NULL, "item", item);
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cJSON_ReplaceItemInObject(item, NULL, item);
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cJSON_ReplaceItemInObject(item, "item", NULL);
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cJSON_ReplaceItemInObjectCaseSensitive(NULL, "item", item);
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cJSON_ReplaceItemInObjectCaseSensitive(item, NULL, item);
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cJSON_ReplaceItemInObjectCaseSensitive(item, "item", NULL);
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TEST_ASSERT_NULL(cJSON_Duplicate(NULL, true));
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TEST_ASSERT_FALSE(cJSON_Compare(item, NULL, false));
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TEST_ASSERT_FALSE(cJSON_Compare(NULL, item, false));
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cJSON_Minify(NULL);
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/* skipped because it is only used via a macro that checks for NULL */
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/* cJSON_SetNumberHelper(NULL, 0); */
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cJSON_Delete(item);
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}
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static void *failing_realloc(void *pointer, size_t size)
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{
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(void)size;
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(void)pointer;
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return NULL;
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}
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static void ensure_should_fail_on_failed_realloc(void)
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{
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printbuffer buffer = {NULL, 10, 0, 0, false, false, {&malloc, &free, &failing_realloc}};
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buffer.buffer = (unsigned char*)malloc(100);
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TEST_ASSERT_NOT_NULL(buffer.buffer);
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TEST_ASSERT_NULL_MESSAGE(ensure(&buffer, 200), "Ensure didn't fail with failing realloc.");
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}
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int main(void)
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{
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UNITY_BEGIN();
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RUN_TEST(cjson_array_foreach_should_loop_over_arrays);
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RUN_TEST(cjson_array_foreach_should_not_dereference_null_pointer);
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RUN_TEST(cjson_get_object_item_should_get_object_items);
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RUN_TEST(cjson_get_object_item_case_sensitive_should_get_object_items);
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RUN_TEST(typecheck_functions_should_check_type);
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RUN_TEST(cjson_should_not_parse_to_deeply_nested_jsons);
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RUN_TEST(cjson_set_number_value_should_set_numbers);
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RUN_TEST(cjson_detach_item_via_pointer_should_detach_items);
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RUN_TEST(cjson_replace_item_via_pointer_should_replace_items);
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RUN_TEST(cjson_replace_item_in_object_should_preserve_name);
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RUN_TEST(cjson_functions_shouldnt_crash_with_null_pointers);
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RUN_TEST(ensure_should_fail_on_failed_realloc);
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return UNITY_END();
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}
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