@@ -934,6 +934,7 @@ if test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "openssl"; then

 			EVP_PKEY_id \

 			EVP_PKEY_get0_RSA \

 			EVP_PKEY_get0_DSA \

+			EVP_PKEY_get0_EC_KEY \

 			RSA_set_flags \

 			RSA_bits \

 			RSA_get0_key \

@@ -949,6 +950,7 @@ if test "${enable_crypto}" = "yes" -a "${with_crypto_library}" = "openssl"; then

 			RSA_meth_set_init \

 			RSA_meth_set_finish \

 			RSA_meth_set0_app_data \

+			EC_GROUP_order_bits

 		]

 	)

@@ -244,6 +244,20 @@ EVP_PKEY_get0_RSA(EVP_PKEY *pkey)

 }

 #endif

+#if !defined(HAVE_EVP_PKEY_GET0_EC_KEY) && !defined(OPENSSL_NO_EC)

+/**

+ * Get the EC_KEY object of a public key

+ *

+ * @param pkey                Public key object

+ * @return                    The underlying EC_KEY object

+ */

+static inline EC_KEY *

+EVP_PKEY_get0_EC_KEY(EVP_PKEY *pkey)

+{

+    return pkey ? pkey->pkey.ec : NULL;

+}

+#endif

+

 #if !defined(HAVE_EVP_PKEY_ID)

 /**

  * Get the PKEY type

@@ -610,6 +624,24 @@ RSA_meth_set0_app_data(RSA_METHOD *meth, void *app_data)

 }

 #endif

+#if !defined(HAVE_EC_GROUP_ORDER_BITS) && !defined(OPENSSL_NO_EC)

+/**

+ * Gets the number of bits of the order of an EC_GROUP

+ *

+ *  @param  group               EC_GROUP object

+ *  @return                     number of bits of group order.

+ */

+static inline int

+EC_GROUP_order_bits(const EC_GROUP *group)

+{

+    BIGNUM* order = BN_new();

+    EC_GROUP_get_order(group, order, NULL);

+    int bits = BN_num_bits(order);

+    BN_free(order);

+    return bits;

+}

+#endif

+

 /* SSLeay symbols have been renamed in OpenSSL 1.1 */

 #if !defined(RSA_F_RSA_OSSL_PRIVATE_ENCRYPT)

 #define RSA_F_RSA_OSSL_PRIVATE_ENCRYPT       RSA_F_RSA_EAY_PRIVATE_ENCRYPT

@@ -1077,6 +1077,13 @@ tls_ctx_use_external_private_key(struct tls_root_ctx *ctx,

     ASSERT(pkey); /* NULL before SSL_CTX_use_certificate() is called */

     pub_rsa = EVP_PKEY_get0_RSA(pkey);

+    /* Certificate might not be RSA but DSA or EC */

+    if (!pub_rsa)

+    {

+        crypto_msg(M_WARN, "management-external-key requires a RSA certificate");

+        goto err;

+    }

+

     /* initialize RSA object */

     const BIGNUM *n = NULL;

     const BIGNUM *e = NULL;

@@ -1683,18 +1690,36 @@ print_details(struct key_state_ssl *ks_ssl, const char *prefix)

         EVP_PKEY *pkey = X509_get_pubkey(cert);

         if (pkey != NULL)

         {

-            if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA && EVP_PKEY_get0_RSA(pkey) != NULL)

+            if ((EVP_PKEY_id(pkey) == EVP_PKEY_RSA) && (EVP_PKEY_get0_RSA(pkey) != NULL))

             {

                 RSA *rsa = EVP_PKEY_get0_RSA(pkey);

                 openvpn_snprintf(s2, sizeof(s2), ", %d bit RSA",

                                  RSA_bits(rsa));

             }

-            else if (EVP_PKEY_id(pkey) == EVP_PKEY_DSA && EVP_PKEY_get0_DSA(pkey) != NULL)

+            else if ((EVP_PKEY_id(pkey) == EVP_PKEY_DSA) && (EVP_PKEY_get0_DSA(pkey) != NULL))

             {

                 DSA *dsa = EVP_PKEY_get0_DSA(pkey);

                 openvpn_snprintf(s2, sizeof(s2), ", %d bit DSA",

                                  DSA_bits(dsa));

             }

+#ifndef OPENSSL_NO_EC

+            else if ((EVP_PKEY_id(pkey) == EVP_PKEY_EC) && (EVP_PKEY_get0_EC_KEY(pkey) != NULL))

+            {

+                EC_KEY *ec = EVP_PKEY_get0_EC_KEY(pkey);

+                const EC_GROUP *group = EC_KEY_get0_group(ec);

+                const char* curve;

+

+                int nid = EC_GROUP_get_curve_name(group);

+                if (nid == 0 || (curve = OBJ_nid2sn(nid)) == NULL)

+                {

+                    curve = "Error getting curve name";

+                }

+

+                openvpn_snprintf(s2, sizeof(s2), ", %d bit EC, curve: %s",

+                                 EC_GROUP_order_bits(group), curve);

+

+            }

+#endif

             EVP_PKEY_free(pkey);

         }

         X509_free(cert);