fix compilation errors on Windows for the PQC and Crypto Refresh code

src/lib/crypto/dilithium_exdsa_composite.cpp

@@ -244,6 +244,12 @@ pgp_dilithium_exdsa_composite_private_key_t::operator=(
     return *this;
 }
 
+/* also offer copy constructor */
+pgp_dilithium_exdsa_composite_private_key_t::pgp_dilithium_exdsa_composite_private_key_t(const pgp_dilithium_exdsa_composite_private_key_t &other)
+{
+    *this = other;
+}
+
 pgp_dilithium_exdsa_composite_private_key_t::pgp_dilithium_exdsa_composite_private_key_t(
   std::vector<uint8_t> const &exdsa_key_encoded,
   std::vector<uint8_t> const &dilithium_key_encoded,

src/lib/crypto/dilithium_exdsa_composite.h

@@ -91,6 +91,7 @@ class pgp_dilithium_exdsa_composite_private_key_t
                                                 pgp_pubkey_alg_t            pk_alg);
     pgp_dilithium_exdsa_composite_private_key_t &operator=(
       const pgp_dilithium_exdsa_composite_private_key_t &other);
+    pgp_dilithium_exdsa_composite_private_key_t(const pgp_dilithium_exdsa_composite_private_key_t &other);
     pgp_dilithium_exdsa_composite_private_key_t() = default;
 
     rnp_result_t sign(rnp::RNG *                       rng,

src/lib/crypto/kyber_ecdh_composite.cpp

@@ -261,6 +261,12 @@ pgp_kyber_ecdh_composite_private_key_t::operator=(
     return *this;
 }
 
+/* also offer copy constructor */
+pgp_kyber_ecdh_composite_private_key_t::pgp_kyber_ecdh_composite_private_key_t(const pgp_kyber_ecdh_composite_private_key_t &other)
+{
+    *this = other;
+}
+
 size_t
 pgp_kyber_ecdh_composite_private_key_t::encoded_size(pgp_pubkey_alg_t pk_alg)
 {

src/lib/crypto/kyber_ecdh_composite.h

@@ -92,6 +92,7 @@ class pgp_kyber_ecdh_composite_private_key_t : public pgp_kyber_ecdh_composite_k
                                            pgp_pubkey_alg_t            pk_alg);
     pgp_kyber_ecdh_composite_private_key_t &operator=(
       const pgp_kyber_ecdh_composite_private_key_t &other);
+    pgp_kyber_ecdh_composite_private_key_t(const pgp_kyber_ecdh_composite_private_key_t &other);
     pgp_kyber_ecdh_composite_private_key_t() = default;
 
     rnp_result_t decrypt(rnp::RNG *                        rng,

src/tests/hkdf.cpp

@@ -33,7 +33,7 @@ TEST_F(rnp_tests, hkdf_test_case_1)
       0x3c, 0xb2, 0x5f, 0x25, 0xfa, 0xac, 0xd5, 0x7a, 0x90, 0x43, 0x4f, 0x64, 0xd0, 0x36,
       0x2f, 0x2a, 0x2d, 0x2d, 0x0a, 0x90, 0xcf, 0x1a, 0x5a, 0x4c, 0x5d, 0xb0, 0x2d, 0x56,
       0xec, 0xc4, 0xc5, 0xbf, 0x34, 0x00, 0x72, 0x08, 0xd5, 0xb8, 0x87, 0x18, 0x58, 0x65};
-    size_t L = 42;
+    const size_t L = 42;
 
     std::unique_ptr<rnp::Hkdf> hkdf = rnp::Hkdf::create(PGP_HASH_SHA256);