UA_unbase64: 75| 91|UA_unbase64(const unsigned char *src, size_t len, size_t *out_len) { 76| | /* Empty base64 results in an empty byte-string */ 77| 91| if(len == 0) { ------------------ | Branch (77:8): [True: 0, False: 91] ------------------ 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| 91| size_t olen = (len / 4 * 3) + 4; 84| 91| unsigned char *out = (unsigned char*)UA_malloc(olen); ------------------ | | 18| 91|#define UA_malloc(size) UA_mallocSingleton(size) ------------------ 85| 91| if(!out) ------------------ | Branch (85:8): [True: 0, False: 91] ------------------ 86| 0| return NULL; 87| | 88| | /* Iterate over the input */ 89| 91| size_t pad = 0; 90| 91| unsigned char count = 0; 91| 91| unsigned char block[4]; 92| 91| unsigned char *pos = out; 93| 2.91M| for(size_t i = 0; i < len; i++) { ------------------ | Branch (93:23): [True: 2.91M, False: 59] ------------------ 94| 2.91M| if(src[i] & 0x80) ------------------ | Branch (94:12): [True: 15, False: 2.91M] ------------------ 95| 15| goto error; /* Non-ASCII input */ 96| 2.91M| unsigned char tmp = dtable[src[i]]; 97| 2.91M| if(tmp == 0x80) ------------------ | Branch (97:12): [True: 12, False: 2.91M] ------------------ 98| 12| goto error; /* Not an allowed character */ 99| 2.91M| if(tmp == 0x7f) ------------------ | Branch (99:12): [True: 226, False: 2.91M] ------------------ 100| 226| continue; /* Whitespace is ignored to accomodate RFC 2045, used in 101| | * XML for xs:base64Binary. */ 102| 2.91M| block[count++] = tmp; 103| | 104| | /* Padding */ 105| 2.91M| if(src[i] == '=') { ------------------ | Branch (105:12): [True: 225, False: 2.91M] ------------------ 106| 225| if(count < 3) /* Padding can only be the last two bytes of a block */ ------------------ | Branch (106:16): [True: 2, False: 223] ------------------ 107| 2| goto error; 108| 223| block[count-1] = 0; 109| 223| pad++; 110| 2.91M| } else if(pad > 0) { ------------------ | Branch (110:19): [True: 3, False: 2.91M] ------------------ 111| 3| goto error; /* Padding not terminated correctly */ 112| 3| } 113| | 114| | /* Write three output characters for four characters of input */ 115| 2.91M| if(count == 4) { ------------------ | Branch (115:12): [True: 728k, False: 2.18M] ------------------ 116| 728k| if(pad > 2) ------------------ | Branch (116:16): [True: 0, False: 728k] ------------------ 117| 0| goto error; /* Invalid padding */ 118| 728k| *pos++ = (block[0] << 2) | (block[1] >> 4); 119| 728k| *pos++ = (block[1] << 4) | (block[2] >> 2); 120| 728k| *pos++ = (block[2] << 6) | block[3]; 121| 728k| count = 0; 122| 728k| pos -= pad; 123| 728k| pad = 0; 124| 728k| } 125| 2.91M| } 126| | 127| | /* Input length not a multiple of four */ 128| 59| if(count > 0) ------------------ | Branch (128:8): [True: 20, False: 39] ------------------ 129| 20| goto error; 130| | 131| 39| *out_len = (size_t)(pos - out); 132| 39| if(*out_len == 0) { ------------------ | Branch (132:8): [True: 8, False: 31] ------------------ 133| 8| UA_free(out); ------------------ | | 19| 8|#define UA_free(ptr) UA_freeSingleton(ptr) ------------------ 134| 8| return (unsigned char*)UA_EMPTY_ARRAY_SENTINEL; ------------------ | | 755| 8|#define UA_EMPTY_ARRAY_SENTINEL ((void*)0x01) ------------------ 135| 8| } 136| 31| return out; 137| | 138| 52| error: 139| 52| UA_free(out); ------------------ | | 19| 52|#define UA_free(ptr) UA_freeSingleton(ptr) ------------------ 140| | return NULL; 141| 39|} LLVMFuzzerTestOneInput: 18| 91|LLVMFuzzerTestOneInput(uint8_t *data, size_t size) { 19| 91| size_t retLen; 20| 91| unsigned char* ret = UA_unbase64(data, size, &retLen); 21| 91| if (retLen > 0) ------------------ | Branch (21:9): [True: 83, False: 8] ------------------ 22| 83| free(ret); 23| 91| return 0; 24| 91|}