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further refinement

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This commit is contained in:
van Hauser
2020-06-22 13:48:59 +02:00
parent 07a4e6370a
commit 76a2d9b59b
4 changed files with 72 additions and 44 deletions
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18
src/afl-fuzz-queue.c
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@ -107,7 +107,7 @@ static u8 check_if_text(struct queue_entry *q) {
if (q->len < AFL_TXT_MIN_LEN) return 0;
u8 buf[MAX_FILE];
u8 buf[MAX_FILE], bom[3] = {0xef, 0xbb, 0xbf};
s32 fd, len = q->len, offset = 0, ascii = 0, utf8 = 0, comp;
if ((fd = open(q->fname, O_RDONLY)) < 0) return 0;
@ -189,17 +189,27 @@ static u8 check_if_text(struct queue_entry *q) {
}
// handle utf8 bom
if (buf[offset + 0] == bom[0] && buf[offset + 1] == bom[1] &&
buf[offset + 2] == bom[2]) {
offset += 3;
utf8++;
comp -= 2;
continue;
}
offset++;
}
u32 percent_utf8 = (utf8 * 100) / comp;
u32 percent_ascii = (ascii * 100) / len;
if (percent_utf8 >= percent_ascii && percent_utf8 >= AFL_TXT_MIN_PERCENT)
return 2;
if (percent_ascii >= AFL_TXT_MIN_PERCENT)
return 1;
if (percent_ascii >= AFL_TXT_MIN_PERCENT) return 1;
return 0;
}