upgrade BIGNUM class for openssl 1.1

Author: tpruvot

Diff for: Algo256/keccak256.cu

@@ -25,7 +25,7 @@ extern void keccak256_setOutput(int thr_id);
 extern void keccak256_sm3_init(int thr_id, uint32_t threads);
 extern void keccak256_sm3_free(int thr_id);
 extern void keccak256_sm3_setBlock_80(void *pdata, const void *ptarget);
-extern uint32_t keccak256_sm3_hash_80(int thr_id, uint32_t threads, uint32_t startNonce, uint32_t* resNonces, int order);
+extern void keccak256_sm3_hash_80(int thr_id, uint32_t threads, uint32_t startNonce, uint32_t* resNonces, int order);
 
 // CPU Hash
 extern "C" void keccak256_hash(void *state, const void *input)

Diff for: bignum.cpp

@@ -5,7 +5,13 @@
 #include <stdio.h>
 
 #include "uint256.h"
+
+#include <openssl/opensslv.h>
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+#include "compat/bignum_ssl10.hpp"
+#else
 #include "bignum.hpp"
+#endif
 
 #include "miner.h" // hex2bin