Omit RSA key generation test if no strong entropy is present
The RSA key generation test needs strong entropy to succeed. This commit captures the presence of a strong entropy
source in a preprocessor flag and only runs the key generation test if that flag is set.
diff --git a/include/mbedtls/entropy.h b/include/mbedtls/entropy.h
index 747aca4..b374b34 100644
--- a/include/mbedtls/entropy.h
+++ b/include/mbedtls/entropy.h
@@ -55,6 +55,16 @@
#define MBEDTLS_ERR_ENTROPY_NO_STRONG_SOURCE -0x003D /**< No strong sources have been added to poll. */
#define MBEDTLS_ERR_ENTROPY_FILE_IO_ERROR -0x003F /**< Read/write error in file. */
+/* Indicates whether at least one standard strong entropy source is enabled. */
+#if defined(MBEDTLS_TEST_NULL_ENTROPY) || \
+ ( !defined(MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES) && \
+ ( !defined(MBEDTLS_NO_PLATFORM_ENTROPY) || \
+ defined(MBEDTLS_HAVEGE_C) || \
+ defined(MBEDTLS_ENTROPY_HARDWARE_ALT) || \
+ defined(ENTROPY_NV_SEED) ) )
+#define MBEDTLS_ENTROPY_HAVE_STRONG
+#endif
+
/**
* \name SECTION: Module settings
*