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new rtn cmplog: instrumentation side + supporting functions

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vanhauser-thc
2021-10-17 13:05:33 +02:00
parent 34f1074ba3
commit ed10f3783b
9 changed files with 551 additions and 26 deletions
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91
src/afl-fuzz-queue.c
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@ -315,7 +315,96 @@ void mark_as_redundant(afl_state_t *afl, struct queue_entry *q, u8 state) {
}
/* check if ascii or UTF-8 */
/* check if pointer is ascii or UTF-8 */
u8 check_if_text_buf(u8 *buf, u32 len) {
u32 offset = 0, ascii = 0, utf8 = 0;
while (offset < len) {
// ASCII: <= 0x7F to allow ASCII control characters
if ((buf[offset + 0] == 0x09 || buf[offset + 0] == 0x0A ||
buf[offset + 0] == 0x0D ||
(0x20 <= buf[offset + 0] && buf[offset + 0] <= 0x7E))) {
offset++;
utf8++;
ascii++;
continue;
}
if (isascii((int)buf[offset]) || isprint((int)buf[offset])) {
ascii++;
// we continue though as it can also be a valid utf8
}
// non-overlong 2-byte
if (len - offset > 1 &&
((0xC2 <= buf[offset + 0] && buf[offset + 0] <= 0xDF) &&
(0x80 <= buf[offset + 1] && buf[offset + 1] <= 0xBF))) {
offset += 2;
utf8++;
continue;
}
// excluding overlongs
if ((len - offset > 2) &&
((buf[offset + 0] == 0xE0 &&
(0xA0 <= buf[offset + 1] && buf[offset + 1] <= 0xBF) &&
(0x80 <= buf[offset + 2] &&
buf[offset + 2] <= 0xBF)) || // straight 3-byte
(((0xE1 <= buf[offset + 0] && buf[offset + 0] <= 0xEC) ||
buf[offset + 0] == 0xEE || buf[offset + 0] == 0xEF) &&
(0x80 <= buf[offset + 1] && buf[offset + 1] <= 0xBF) &&
(0x80 <= buf[offset + 2] &&
buf[offset + 2] <= 0xBF)) || // excluding surrogates
(buf[offset + 0] == 0xED &&
(0x80 <= buf[offset + 1] && buf[offset + 1] <= 0x9F) &&
(0x80 <= buf[offset + 2] && buf[offset + 2] <= 0xBF)))) {
offset += 3;
utf8++;
continue;
}
// planes 1-3
if ((len - offset > 3) &&
((buf[offset + 0] == 0xF0 &&
(0x90 <= buf[offset + 1] && buf[offset + 1] <= 0xBF) &&
(0x80 <= buf[offset + 2] && buf[offset + 2] <= 0xBF) &&
(0x80 <= buf[offset + 3] &&
buf[offset + 3] <= 0xBF)) || // planes 4-15
((0xF1 <= buf[offset + 0] && buf[offset + 0] <= 0xF3) &&
(0x80 <= buf[offset + 1] && buf[offset + 1] <= 0xBF) &&
(0x80 <= buf[offset + 2] && buf[offset + 2] <= 0xBF) &&
(0x80 <= buf[offset + 3] && buf[offset + 3] <= 0xBF)) || // plane 16
(buf[offset + 0] == 0xF4 &&
(0x80 <= buf[offset + 1] && buf[offset + 1] <= 0x8F) &&
(0x80 <= buf[offset + 2] && buf[offset + 2] <= 0xBF) &&
(0x80 <= buf[offset + 3] && buf[offset + 3] <= 0xBF)))) {
offset += 4;
utf8++;
continue;
}
offset++;
}
return (utf8 > ascii ? utf8 : ascii);
}
/* check if queue entry is ascii or UTF-8 */
static u8 check_if_text(afl_state_t *afl, struct queue_entry *q) {