Prep ech types for python::boost binding

Summary: Adds copy contructors to HpkeConfig and ECHContentConfigDraft for binding with python::boost

Reviewed By: mingtaoy

Differential Revision: D45656861

fbshipit-source-id: 0bcfd36196e952b78dc39ab2d572f6dfbbde70b9

third-party/fizz/src/fizz/protocol/ech/Types.h

@@ -41,13 +41,74 @@ struct HpkeKeyConfig {
   hpke::KEMId kem_id;
   HpkePublicKey public_key;
   std::vector<HpkeSymmetricCipherSuite> cipher_suites;
+
+  HpkeKeyConfig() {}
+  HpkeKeyConfig(const HpkeKeyConfig& other) {
+    config_id = other.config_id;
+    kem_id = other.kem_id;
+    public_key = other.public_key->clone();
+    cipher_suites = other.cipher_suites;
+  }
+  HpkeKeyConfig(HpkeKeyConfig&& other) = default;
+  HpkeKeyConfig& operator=(const HpkeKeyConfig&& other) {
+    if (this != &other) {
+      config_id = other.config_id;
+      kem_id = other.kem_id;
+      public_key = other.public_key->clone();
+      cipher_suites = other.cipher_suites;
+    }
+    return *this;
+  }
+  HpkeKeyConfig& operator=(const HpkeKeyConfig& other) {
+    if (this != &other) {
+      config_id = other.config_id;
+      kem_id = other.kem_id;
+      public_key = other.public_key->clone();
+      cipher_suites = other.cipher_suites;
+    }
+    return *this;
+  }
 };
 
 struct ECHConfigContentDraft {
   HpkeKeyConfig key_config;
   uint8_t maximum_name_length;
   Buf public_name;
   std::vector<Extension> extensions;
+
+  ECHConfigContentDraft() {}
+  ECHConfigContentDraft(const ECHConfigContentDraft& other) {
+    key_config = other.key_config;
+    maximum_name_length = other.maximum_name_length;
+    public_name = other.public_name->clone();
+    extensions = std::vector<Extension>();
+    for (const auto& extension : other.extensions)
+      extensions.push_back(extension.clone());
+  }
+  ECHConfigContentDraft(ECHConfigContentDraft&& other) = default;
+  ECHConfigContentDraft& operator=(ECHConfigContentDraft&& other) {
+    if (this != &other) {
+      key_config = other.key_config;
+      maximum_name_length = other.maximum_name_length;
+      public_name = std::move(other.public_name);
+      extensions = std::vector<Extension>();
+      for (const auto& extension : other.extensions)
+        extensions.push_back(extension.clone());
+    }
+    return *this;
+  }
+
+  ECHConfigContentDraft& operator=(const ECHConfigContentDraft& other) {
+    if (this != &other) {
+      key_config = other.key_config;
+      maximum_name_length = other.maximum_name_length;
+      public_name = other.public_name->clone();
+      extensions = std::vector<Extension>();
+      for (const auto& extension : other.extensions)
+        extensions.push_back(extension.clone());
+    }
+    return *this;
+  }
 };
 
 struct ECHConfig {