fix: enabled fuzzing

fuzz/fuzz_targets/kyber_encaps.rs

@@ -0,0 +1,19 @@
+#![no_main]
+extern crate arbitrary;
+extern crate rosenpass;
+
+use libfuzzer_sys::fuzz_target;
+
+use rosenpass::pqkem::{EphemeralKEM, KEM};
+
+#[derive(arbitrary::Arbitrary, Debug)]
+pub struct Input {
+    pub pk: [u8; 800],
+}
+
+fuzz_target!(|input: Input| {
+    let mut ciphertext = [0u8; 768];
+    let mut shared_secret = [0u8; 32];
+
+    EphemeralKEM::encaps(&mut shared_secret, &mut ciphertext, &input.pk).unwrap();
+});