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OSS-Fuzz: Add new fuzzer upstream #107

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Merged
merged 3 commits into from
Oct 31, 2024
Merged

OSS-Fuzz: Add new fuzzer upstream #107

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f684d71
OSS-Fuzz: Add new fuzzer upstream
arthurscchan Oct 29, 2024
7b9eb47
Fix formatting
arthurscchan Oct 30, 2024
ac1c634
Fix string creating logic and add comments
arthurscchan Oct 30, 2024
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6 changes: 6 additions & 0 deletions fuzz/Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -23,5 +23,11 @@ path = "fuzz_targets/streaming.rs"
test = false
doc = false

[[bin]]
name = "process"
path = "fuzz_targets/process.rs"
test = false
doc = false

# Work around https://github.com/rust-lang/cargo/issues/8338
[workspace]
78 changes: 78 additions & 0 deletions fuzz/fuzz_targets/process.rs
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Original file line number Diff line number Diff line change
@@ -0,0 +1,78 @@
// The fuzzing harness fuzz test some of the the
// unicode string normalization processing

#![no_main]

#[macro_use]
extern crate libfuzzer_sys;
extern crate unicode_normalization;

use unicode_normalization::{
char::{
canonical_combining_class, compose, decompose_canonical, decompose_compatible,
is_combining_mark,
},
UnicodeNormalization,
};

fuzz_target!(|data: (u8, String)| {
let (function_index, string_data) = data;

// Create an iterator for characters
let mut chars = string_data.chars();

// Randomly fuzz a target function
match function_index % 10 {
0 => {
// Fuzz compose with two distinct characters
if let (Some(c1), Some(c2)) = (chars.next(), chars.next()) {
let _ = compose(c1, c2);
}
}
1 => {
// Fuzz canonical_combining_class
if let Some(c) = chars.next() {
let _ = canonical_combining_class(c);
}
}
2 => {
// Fuzz is_combining_mark
if let Some(c) = chars.next() {
let _ = is_combining_mark(c);
}
}
3 => {
// Fuzz NFC
let _ = string_data.nfc().collect::<String>();
}
4 => {
// Fuzz NFKD
let _ = string_data.nfkd().collect::<String>();
}
5 => {
// Fuzz NFD
let _ = string_data.nfd().collect::<String>();
}
6 => {
// Fuzz NFKC
let _ = string_data.nfkc().collect::<String>();
}
7 => {
// Fuzz stream_safe
let _ = string_data.stream_safe().collect::<String>();
}
8 => {
// Fuzz decompose_canonical
if let Some(c) = chars.next() {
decompose_canonical(c, |_| {});
}
}
9 => {
// Fuzz decompose_compatible
if let Some(c) = chars.next() {
decompose_compatible(c, |_| {});
}
}
_ => {}
}
});
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