+#error PolarSSL version 1.0.0 or greater is required!
+#endif
+
+#ifdef USE_POLARSSL_HAVEGE
+#include <polarssl/havege.h>
+ #if (POLARSSL_VERSION_MINOR >= 1)
+ #define HAVEGE_RAND (havege_random)
+ #define RAND_bytes(_dst_, _size_) do { \
+ havege_random(&hs, _dst_, _size_); \
+ } while (0)
+ #else
+ #define HAVEGE_RAND (havege_rand)
+ #define RAND_bytes(_dst_, _size_) do { \
+ int i; \
+ for (i = 0; i < _size_; i++) { \
+ _dst_[i] = havege_rand(&hs); \
+ } \
+ } while (0)
+ #endif
+#else
+#define RAND_bytes(_dst_, _size_) do { urandom_bytes(NULL, _dst_, _size_); } while (0)
+int urandom_bytes(void *ctx, unsigned char *dest, size_t len);
+#endif
+
+#if (POLARSSL_VERSION_MINOR >= 2)
+ #define POLARSSL_API_V1_2_ABOVE
+#endif
+#if (POLARSSL_VERSION_MINOR == 3)
+ #define POLARSSL_API_V1_3_ABOVE
+#endif
+
+#else /* OpenSSL */