Add support for x448.

Author: dgarske

examples/middlebox/decrypt.c

@@ -81,6 +81,9 @@ static int myKeyCb(void* vSniffer, int namedGroup,
 #ifdef HAVE_CURVE25519
     static EtsKey keyX25519;
 #endif
+#ifdef HAVE_CURVE448
+    static EtsKey keyX448;
+#endif
 
     /* lookup based on key type */
     keyType = wolfEtsGetPkType(namedGroup);
@@ -101,7 +104,10 @@ static int myKeyCb(void* vSniffer, int namedGroup,
         #endif
             break;
         case WC_PK_TYPE_CURVE448:
-            /* curve448 not yet supported in sniffer */
+        #ifdef HAVE_CURVE448
+            key = &keyX448;
+        #endif
+            break;
         default:
             /* not supported */
             key = NULL;

src/mod_tls.c

@@ -233,6 +233,11 @@ static int wolfTlsInitSslDefaults(WOLFSSL_CTX* ctx, WOLFSSL** ssl)
         wolfSSL_SetIOReadCtx(tssl, cbCtx);
         wolfSSL_SetIOWriteCtx(tssl, cbCtx);
 
+    #if 0
+        /* example for forcing a key share type (see ssl.h Named Groups enum) */
+        wolfSSL_UseKeyShare(tssl, WOLFSSL_ECC_X448);
+    #endif
+
         *ssl = tssl;
     }
     return 0;