5 files changed, 6 insertions, 6 deletions
diff --git a/src/lib/kdf/hkdf/hkdf.h b/src/lib/kdf/hkdf/hkdf.h
index d8389a886..d4e4006ca 100644
--- a/src/lib/kdf/hkdf/hkdf.h
+++ b/src/lib/kdf/hkdf/hkdf.h
@@ -18,7 +18,7 @@ namespace Botan {
 * HKDF, see @rfc 5869 for details
 * This is only the expansion portion of HKDF
 */
-class BOTAN_DLL HKDF : public KDF
+class BOTAN_DLL HKDF final : public KDF
    {
    public:
       HKDF(MessageAuthenticationCode* prf) : m_prf(prf) {}
diff --git a/src/lib/kdf/kdf1/kdf1.h b/src/lib/kdf/kdf1/kdf1.h
index a22d19d97..2697685ac 100644
--- a/src/lib/kdf/kdf1/kdf1.h
+++ b/src/lib/kdf/kdf1/kdf1.h
@@ -16,7 +16,7 @@ namespace Botan {
 /**
 * KDF1, from IEEE 1363
 */
-class BOTAN_DLL KDF1 : public KDF
+class BOTAN_DLL KDF1 final : public KDF
    {
    public:
       std::string name() const override { return "KDF1(" + m_hash->name() + ")"; }
diff --git a/src/lib/kdf/kdf2/kdf2.h b/src/lib/kdf/kdf2/kdf2.h
index e8a8be1fa..ad62ed301 100644
--- a/src/lib/kdf/kdf2/kdf2.h
+++ b/src/lib/kdf/kdf2/kdf2.h
@@ -16,7 +16,7 @@ namespace Botan {
 /**
 * KDF2, from IEEE 1363
 */
-class BOTAN_DLL KDF2 : public KDF
+class BOTAN_DLL KDF2 final : public KDF
    {
    public:
       std::string name() const override { return "KDF2(" + m_hash->name() + ")"; }
diff --git a/src/lib/kdf/prf_tls/prf_tls.h b/src/lib/kdf/prf_tls/prf_tls.h
index bb7cc2c4f..f000484a7 100644
--- a/src/lib/kdf/prf_tls/prf_tls.h
+++ b/src/lib/kdf/prf_tls/prf_tls.h
@@ -16,7 +16,7 @@ namespace Botan {
 /**
 * PRF used in TLS 1.0/1.1
 */
-class BOTAN_DLL TLS_PRF : public KDF
+class BOTAN_DLL TLS_PRF final : public KDF
    {
    public:
       std::string name() const override { return "TLS-PRF"; }
@@ -36,7 +36,7 @@ class BOTAN_DLL TLS_PRF : public KDF
 /**
 * PRF used in TLS 1.2
 */
-class BOTAN_DLL TLS_12_PRF : public KDF
+class BOTAN_DLL TLS_12_PRF final : public KDF
    {
    public:
       std::string name() const override { return "TLS-12-PRF(" + m_mac->name() + ")"; }
diff --git a/src/lib/kdf/prf_x942/prf_x942.h b/src/lib/kdf/prf_x942/prf_x942.h
index d0b23067c..f31036649 100644
--- a/src/lib/kdf/prf_x942/prf_x942.h
+++ b/src/lib/kdf/prf_x942/prf_x942.h
@@ -15,7 +15,7 @@ namespace Botan {
 /**
 * PRF from ANSI X9.42
 */
-class BOTAN_DLL X942_PRF : public KDF
+class BOTAN_DLL X942_PRF final : public KDF
    {
    public:
       std::string name() const override { return "X942_PRF(" + m_key_wrap_oid + ")"; }