const-oid v0.9.2

const-oid/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "const-oid"
-version = "0.9.1"
+version = "0.9.2"
 authors = ["RustCrypto Developers"]
 license = "Apache-2.0 OR MIT"
 description = """
@@ -16,6 +16,9 @@ readme = "README.md"
 edition = "2021"
 rust-version = "1.57"
 
+[dependencies]
+arbitrary = { version = "1.2", optional = true, features = ["derive"] }
+
 [dev-dependencies]
 hex-literal = "0.3"
 

const-oid/src/lib.rs

@@ -252,3 +252,29 @@ impl fmt::Display for ObjectIdentifier {
         Ok(())
     }
 }
+
+// Implement by hand because the derive would create invalid values.
+// Use the constructor to create a valid oid with at least 3 arcs.
+#[cfg(feature = "arbitrary")]
+impl<'a> arbitrary::Arbitrary<'a> for ObjectIdentifier {
+    fn arbitrary(u: &mut arbitrary::Unstructured<'a>) -> arbitrary::Result<Self> {
+        let first = u.int_in_range(0..=arcs::ARC_MAX_FIRST)?;
+        let second = u.int_in_range(0..=arcs::ARC_MAX_SECOND)?;
+        let third = u.arbitrary()?;
+
+        let mut oid = Self::from_arcs([first, second, third])
+            .map_err(|_| arbitrary::Error::IncorrectFormat)?;
+
+        for arc in u.arbitrary_iter()? {
+            oid = oid
+                .push_arc(arc?)
+                .map_err(|_| arbitrary::Error::IncorrectFormat)?;
+        }
+
+        Ok(oid)
+    }
+
+    fn size_hint(depth: usize) -> (usize, Option<usize>) {
+        (Arc::size_hint(depth).0.saturating_mul(3), None)
+    }
+}