add fuzz targetv0.1.0

4 files changed, 400 insertions, 0 deletions

diff --git a/fuzz/.gitignore b/fuzz/.gitignore
new file mode 100644
index 0000000..1a45eee
--- /dev/null
+++ b/fuzz/.gitignore
@@ -0,0 +1,4 @@
+target
+corpus
+artifacts
+coverage
diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock
new file mode 100644
index 0000000..a616087
--- /dev/null
+++ b/fuzz/Cargo.lock
@@ -0,0 +1,340 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
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+ "cipher",
+ "crypto-common",
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+ "thiserror",
+ "typenum",
+ "zerocopy",
+]
+
+[[package]]
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+ "chacha20",
+ "leona",
+ "libfuzzer-sys",
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+ "typenum",
+]
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diff --git a/fuzz/Cargo.toml b/fuzz/Cargo.toml
new file mode 100644
index 0000000..b87b441
--- /dev/null
+++ b/fuzz/Cargo.toml
@@ -0,0 +1,25 @@
+[package]
+name = "leona-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2024"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+arbitrary = { version = "1.4.1", features = ["derive"] }
+chacha20 = { version = "0.10.0", features = ["cipher"] }
+libfuzzer-sys = "0.4"
+sha2 = "0.11.0"
+typenum = "1.20.0"
+
+[dependencies.leona]
+path = ".."
+
+[[bin]]
+name = "fuzz_target_1"
+path = "fuzz_targets/fuzz_target_1.rs"
+test = false
+doc = false
+bench = false
diff --git a/fuzz/fuzz_targets/fuzz_target_1.rs b/fuzz/fuzz_targets/fuzz_target_1.rs
new file mode 100644
index 0000000..11b9b90
--- /dev/null
+++ b/fuzz/fuzz_targets/fuzz_target_1.rs
@@ -0,0 +1,31 @@
+#![no_main]
+
+use arbitrary::Arbitrary;
+use libfuzzer_sys::fuzz_target;
+
+use leona::{KeyedHash, Lioness, ZeroIv};
+use chacha20::ChaCha20;
+use sha2::Sha256;
+use typenum::U16;
+
+type Cipher = Lioness<ZeroIv<ChaCha20>, KeyedHash<U16, Sha256>>;
+
+#[derive(Arbitrary, Debug)]
+struct Input<'a> {
+    key: &'a [u8],
+    prefix: [u8; 32],
+    data: &'a [u8],
+}
+
+fuzz_target!(|data: Input| {
+    let mut input = Vec::from(data.prefix);
+    input.extend(data.data);
+
+    let cipher = Cipher::new_dynamic(data.key);
+
+    cipher.encrypt(&mut input).unwrap();
+    cipher.decrypt(&mut input).unwrap();
+
+    assert_eq!(&input[..32], data.prefix);
+    assert_eq!(&input[32..], data.data);
+});