UA_unbase64: 75| 97|UA_unbase64(const unsigned char *src, size_t len, size_t *out_len) { 76| | /* Empty base64 results in an empty byte-string */ 77| 97| if(len == 0) { ------------------ | Branch (77:8): [True: 0, False: 97] ------------------ 78| 0| *out_len = 0; 79| 0| return (unsigned char*)UA_EMPTY_ARRAY_SENTINEL; ------------------ | | 755| 0|#define UA_EMPTY_ARRAY_SENTINEL ((void*)0x01) ------------------ 80| 0| } 81| | 82| | /* Allocate the output string. Append four bytes to allow missing padding */ 83| 97| size_t olen = (len / 4 * 3) + 4; 84| 97| unsigned char *out = (unsigned char*)UA_malloc(olen); ------------------ | | 18| 97|#define UA_malloc(size) UA_mallocSingleton(size) ------------------ 85| 97| if(!out) ------------------ | Branch (85:8): [True: 0, False: 97] ------------------ 86| 0| return NULL; 87| | 88| | /* Iterate over the input */ 89| 97| size_t pad = 0; 90| 97| unsigned char count = 0; 91| 97| unsigned char block[4]; 92| 97| unsigned char *pos = out; 93| 2.46M| for(size_t i = 0; i < len; i++) { ------------------ | Branch (93:23): [True: 2.46M, False: 65] ------------------ 94| 2.46M| if(src[i] & 0x80) ------------------ | Branch (94:12): [True: 17, False: 2.46M] ------------------ 95| 17| goto error; /* Non-ASCII input */ 96| 2.46M| unsigned char tmp = dtable[src[i]]; 97| 2.46M| if(tmp == 0x80) ------------------ | Branch (97:12): [True: 9, False: 2.46M] ------------------ 98| 9| goto error; /* Not an allowed character */ 99| 2.46M| if(tmp == 0x7f) ------------------ | Branch (99:12): [True: 281, False: 2.46M] ------------------ 100| 281| continue; /* Whitespace is ignored to accomodate RFC 2045, used in 101| | * XML for xs:base64Binary. */ 102| 2.46M| block[count++] = tmp; 103| | 104| | /* Padding */ 105| 2.46M| if(src[i] == '=') { ------------------ | Branch (105:12): [True: 244, False: 2.46M] ------------------ 106| 244| if(count < 3) /* Padding can only be the last two bytes of a block */ ------------------ | Branch (106:16): [True: 4, False: 240] ------------------ 107| 4| goto error; 108| 240| block[count-1] = 0; 109| 240| pad++; 110| 2.46M| } else if(pad > 0) { ------------------ | Branch (110:19): [True: 2, False: 2.46M] ------------------ 111| 2| goto error; /* Padding not terminated correctly */ 112| 2| } 113| | 114| | /* Write three output characters for four characters of input */ 115| 2.46M| if(count == 4) { ------------------ | Branch (115:12): [True: 616k, False: 1.84M] ------------------ 116| 616k| if(pad > 2) ------------------ | Branch (116:16): [True: 0, False: 616k] ------------------ 117| 0| goto error; /* Invalid padding */ 118| 616k| *pos++ = (block[0] << 2) | (block[1] >> 4); 119| 616k| *pos++ = (block[1] << 4) | (block[2] >> 2); 120| 616k| *pos++ = (block[2] << 6) | block[3]; 121| 616k| count = 0; 122| 616k| pos -= pad; 123| 616k| pad = 0; 124| 616k| } 125| 2.46M| } 126| | 127| | /* Input length not a multiple of four */ 128| 65| if(count > 0) ------------------ | Branch (128:8): [True: 23, False: 42] ------------------ 129| 23| goto error; 130| | 131| 42| *out_len = (size_t)(pos - out); 132| 42| if(*out_len == 0) { ------------------ | Branch (132:8): [True: 10, False: 32] ------------------ 133| 10| UA_free(out); ------------------ | | 19| 10|#define UA_free(ptr) UA_freeSingleton(ptr) ------------------ 134| 10| return (unsigned char*)UA_EMPTY_ARRAY_SENTINEL; ------------------ | | 755| 10|#define UA_EMPTY_ARRAY_SENTINEL ((void*)0x01) ------------------ 135| 10| } 136| 32| return out; 137| | 138| 55| error: 139| 55| UA_free(out); ------------------ | | 19| 55|#define UA_free(ptr) UA_freeSingleton(ptr) ------------------ 140| | return NULL; 141| 42|} LLVMFuzzerTestOneInput: 18| 97|LLVMFuzzerTestOneInput(uint8_t *data, size_t size) { 19| 97| size_t retLen; 20| 97| unsigned char* ret = UA_unbase64(data, size, &retLen); 21| 97| if (retLen > 0) ------------------ | Branch (21:9): [True: 87, False: 10] ------------------ 22| 87| free(ret); 23| 97| return 0; 24| 97|}