Added checks for platforms with no entropy source

Author: dreemkiller

features/mbedtls/platform/inc/mbedtls_config_reader.h

@@ -18,6 +18,7 @@
 #ifndef __MBEDTLS_CONFIG_READER_H__
 #define __MBEDTLS_CONFIG_READER_H__
 
+#include "platform/inc/platform_mbed.h"
 
 // This first section is checking the values from mbed_app.json and
 // mbedtls/mbed_lib.json and setting the appropriate defines for them
@@ -412,38 +413,46 @@
 #define MBEDTLS_SHA256_C
 #define MBEDTLS_HAVE_TIME
 #define MBEDTLS_REMOVE_ARC4_CIPHERSUITES
-#define MBEDTLS_SSL_TLS_C
 #define MBEDTLS_CIPHER_C
 #define MBEDTLS_MD_C
 #define MBEDTLS_ERROR_STRERROR_DUMMY
-#define MBEDTLS_NO_PLATFORM_ENTROPY
-#define MBEDTLS_SSL_EXTENDED_MASTER_SECRET
-#define MBEDTLS_SSL_PROTO_TLS1_2
 #define MBEDTLS_X509_CHECK_KEY_USAGE
 #define MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE
 #define MBEDTLS_VERSION_C
 #define MBEDTLS_SELF_TEST
 #define MBEDTLS_PK_RSA_ALT_SUPPORT
-#define MBEDTLS_SSL_ALL_ALERT_MESSAGES
-#define MBEDTLS_SSL_ENCRYPT_THEN_MAC
-#define MBEDTLS_SSL_RENEGOTIATION
-#define MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
-#define MBEDTLS_SSL_PROTO_DTLS
-#define MBEDTLS_SSL_ALPN
-#define MBEDTLS_SSL_DTLS_ANTI_REPLAY
-#define MBEDTLS_SSL_DTLS_HELLO_VERIFY
-#define MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE
-#define MBEDTLS_SSL_DTLS_BADMAC_LIMIT
 #define MBEDTLS_SSL_SESSION_TICKETS
-#define MBEDTLS_SSL_EXPORT_KEYS
 #define MBEDTLS_VERSION_FEATURES
 #define MBEDTLS_CTR_DRBG_C
 #define MBEDTLS_DEBUG_C
 #define MBEDTLS_ERROR_C
 #define MBEDTLS_HMAC_DRBG_C
+
+
+#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT) || defined(MBEDTLS_TEST_NULL_ENTROPY) || \
+    defined(MBEDTLS_ENTROPY_NV_SEED)
+
+#define MBEDTLS_NO_PLATFORM_ENTROPY
+#define MBEDTLS_SSL_ALL_ALERT_MESSAGES
+#define MBEDTLS_SSL_ALPN
 #define MBEDTLS_SSL_CACHE_C
 #define MBEDTLS_SSL_COOKIE_C
 #define MBEDTLS_SSL_CLI_C
+#define MBEDTLS_SSL_DTLS_ANTI_REPLAY
+#define MBEDTLS_SSL_DTLS_BADMAC_LIMIT
+#define MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE
+#define MBEDTLS_SSL_DTLS_HELLO_VERIFY
+#define MBEDTLS_SSL_ENCRYPT_THEN_MAC
+#define MBEDTLS_SSL_EXPORT_KEYS
+#define MBEDTLS_SSL_EXTENDED_MASTER_SECRET
+#define MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
+#define MBEDTLS_SSL_PROTO_DTLS
+#define MBEDTLS_SSL_PROTO_TLS1_2
+#define MBEDTLS_SSL_RENEGOTIATION
+#define MBEDTLS_SSL_TLS_C
+
+#endif // #if defined(MBEDTLS_ENTROPY_HARDWARE_ALT) || defined(MBEDTLS_TEST_NULL_ENTROPY) || defined(MBEDTLS_ENTROPY_NV_SEED)
+
 
 // finally, let any file referred to with mbedtls.app-config-file override
 // any of the other selections