test: add blake3 crate example

Cargo.toml

@@ -10,6 +10,7 @@ description = "a useful command line interface"
 [dependencies]
 anyhow = "1.0.82"
 base64 = "0.22.0"
+blake3 = "1.5.1"
 clap = { version = "4.5.4", features = ["derive"] }
 colored = "2.1.0"
 csv = "1.3.0"

examples/blake3.rs

@@ -0,0 +1,32 @@
+fn main() {
+    let hash1 = blake3::hash(b"foobarbaz");
+
+    let mut hasher = blake3::Hasher::new();
+    hasher.update(b"foo");
+    hasher.update(b"bar");
+    hasher.update(b"baz");
+    let hash2 = hasher.finalize();
+    assert_eq!(hash1, hash2);
+
+    let mut output = [0; 1000];
+    let mut output_reader = hasher.finalize_xof();
+    output_reader.fill(&mut output);
+    assert_eq!(hash1, output[..32]);
+
+    println!("{}", hash1);
+
+    let example_key = [42u8; 32];
+    let mac1 = blake3::keyed_hash(&example_key, b"foobarbaz");
+
+    let mut hasher = blake3::Hasher::new_keyed(&example_key);
+    hasher.update(b"foobarbaz");
+    let mac2 = hasher.finalize();
+    assert_eq!(mac1, mac2);
+    println!("{}", mac1);
+
+    const EMAIL_CONTEXT: &str = "BLAKE3 example 2020-01-07 17:10:44 email key";
+    const API_CONTEXT: &str = "BLAKE3 example 2020-01-07 17:11:21 API key";
+    let email_key = blake3::derive_key(EMAIL_CONTEXT, &example_key);
+    let api_key = blake3::derive_key(API_CONTEXT, &example_key);
+    assert_ne!(email_key, api_key);
+}