update ED25519 examples based on feedback

signature/ED25519/Makefile

@@ -15,8 +15,8 @@ LIBRARIES :=
 #example: if using custom install location add the include and lib dir to the
 #         INCLUDE_DIRS and LIBRARY_DIRS respectively
 
-#INCLUDE_DIRS += /Users/khimes/work/testDir/wolf-install-dir-for-testing/include
-#LIBRARY_DIRS += /Users/khimes/work/testDir/wolf-install-dir-for-testing/lib
+#INCLUDE_DIRS += /path-to-custom/wolf-install-dir-for-testing/include
+#LIBRARY_DIRS += /path-to-custom/wolf-install-dir-for-testing/lib
 LIBRARIES += wolfssl
 
 CPPFLAGS += $(foreach includedir,$(INCLUDE_DIRS),-I$(includedir))

signature/ED25519/README

@@ -1,3 +1,11 @@
+Configure and install wolfSSL with these options:
+
+./configure --enable-ed25519
+make
+make install
+
+(if any build issues due to previous installations please run 'ldconfig`)
+
 To compile without Makefile:
 
 gcc -o gen_key_files gen_key_files.c -lwolfssl

signature/ED25519/gen_key_files.c

@@ -3,6 +3,10 @@
 #include <wolfssl/wolfcrypt/ed25519.h>
 #include <wolfssl/ssl.h>
 
+#ifndef HAVE_ED25519
+    #error "Please build wolfSSL with the --enable-ed25519 option"
+#endif
+
 int create_and_output_ed_key(void);
 static int err_sys(const char* msg, int es);
 

signature/ED25519/sign_and_verify.c

@@ -8,6 +8,10 @@
 #define USE_CERT_BUFFERS_ED
 #include "test_keys.h"
 
+#ifndef HAVE_ED25519
+    #error "Please build wolfSSL with the --enable-ed25519 option"
+#endif
+
 static int err_sys(const char* msg, int es);
 
 static int err_sys(const char* msg, int es)