1 #include <stdlib.h>
2 #include <stdint.h>
3 #include <string.h>
4
5 #ifdef __cplusplus
6 extern "C" {
7 #endif
8
9 #include "../cJSON.h"
10
11 int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size); /* required by C89 */
12
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)13 int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
14 {
15 cJSON *json;
16 size_t offset = 4;
17 unsigned char *copied;
18 char *printed_json = NULL;
19 int minify, require_termination, formatted, buffered;
20
21
22 if(size <= offset) return 0;
23 if(data[size-1] != '\0') return 0;
24 if(data[0] != '1' && data[0] != '0') return 0;
25 if(data[1] != '1' && data[1] != '0') return 0;
26 if(data[2] != '1' && data[2] != '0') return 0;
27 if(data[3] != '1' && data[3] != '0') return 0;
28
29 minify = data[0] == '1' ? 1 : 0;
30 require_termination = data[1] == '1' ? 1 : 0;
31 formatted = data[2] == '1' ? 1 : 0;
32 buffered = data[3] == '1' ? 1 : 0;
33
34 json = cJSON_ParseWithOpts((const char*)data + offset, NULL, require_termination);
35
36 if(json == NULL) return 0;
37
38 if(buffered)
39 {
40 printed_json = cJSON_PrintBuffered(json, 1, formatted);
41 }
42 else
43 {
44 /* unbuffered printing */
45 if(formatted)
46 {
47 printed_json = cJSON_Print(json);
48 }
49 else
50 {
51 printed_json = cJSON_PrintUnformatted(json);
52 }
53 }
54
55 if(printed_json != NULL) free(printed_json);
56
57 if(minify)
58 {
59 copied = (unsigned char*)malloc(size);
60 if(copied == NULL) return 0;
61
62 memcpy(copied, data, size);
63
64 cJSON_Minify((char*)copied + offset);
65
66 free(copied);
67 }
68
69 cJSON_Delete(json);
70
71 return 0;
72 }
73
74 #ifdef __cplusplus
75 }
76 #endif
77
78