decode ipld cargo fuzz harness

fuzz/.gitignore

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+target
+corpus
+artifacts
+coverage

fuzz/Cargo.toml

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+[package]
+name = "ipfs-fuzz"
+version = "0.0.0"
+publish = false
+edition = "2018"
+
+[package.metadata]
+cargo-fuzz = true
+
+[dependencies]
+libfuzzer-sys = "0.4"
+cid = "*"
+
+[dependencies.ipfs]
+path = ".."
+
+# Prevent this from interfering with workspaces
+[workspace]
+members = ["."]
+
+[profile.release]
+debug = 1
+
+[[bin]]
+name = "decode_ipld"
+path = "fuzz_targets/decode_ipld.rs"
+test = false
+doc = false

fuzz/fuzz_targets/decode_ipld.rs

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+#![no_main]
+use libfuzzer_sys::fuzz_target;
+use std::convert::TryFrom;
+
+fuzz_target!(|data: (&str, &[u8])| {
+    let _ = fuzz(data.0, data.1);
+});
+
+fn fuzz(cid: &str, payload: &[u8]) -> Result<(), ()> {
+    let cid = ipfs::Cid::try_from(cid).map_err(drop)?;
+    let _ = ipfs::ipld::decode_ipld(&cid, payload).map_err(drop)?;
+    Ok(())
+}