Add SslRef::curve_name()

Author: ghedo

boring/src/ssl/mod.rs

@@ -2780,6 +2780,22 @@ impl SslRef {
         Some(curve_id)
     }
 
+    /// Returns the curve name used for this `SslRef`.
+    #[corresponds(SSL_get_curve_name)]
+    #[must_use]
+    pub fn curve_name(&self) -> Option<&'static str> {
+        let curve_id = self.curve()?;
+
+        unsafe {
+            let ptr = ffi::SSL_get_curve_name(curve_id);
+            if ptr.is_null() {
+                return None;
+            }
+
+            CStr::from_ptr(ptr).to_str().ok()
+        }
+    }
+
     /// Returns an `ErrorCode` value for the most recent operation on this `SslRef`.
     #[corresponds(SSL_get_error)]
     #[must_use]

boring/src/ssl/test/mod.rs

@@ -958,6 +958,8 @@ fn get_curve() {
     let client_stream = client.connect();
     let curve = client_stream.ssl().curve();
     assert!(curve.is_some());
+    let curve_name = client_stream.ssl().curve_name();
+    assert!(curve_name.is_some());
 }
 
 #[test]