Merge pull request #3800

9317bce9 crypto: more places needing fixing for GCC 8.1 (moneroexamples)
4a72d595 chacha: fix build with GCC 8.1 (moneromooo-monero)

src/crypto/chacha.h

@@ -73,14 +73,14 @@ namespace crypto {
     static_assert(sizeof(chacha_key) <= sizeof(hash), "Size of hash must be at least that of chacha_key");
     tools::scrubbed_arr<char, HASH_SIZE> pwd_hash;
     crypto::cn_slow_hash(data, size, pwd_hash.data(), 0/*variant*/, 0/*prehashed*/);
-    memcpy(&key, pwd_hash.data(), sizeof(key));
+    memcpy(&unwrap(key), pwd_hash.data(), sizeof(key));
   }
 
   inline void generate_chacha_key_prehashed(const void *data, size_t size, chacha_key& key) {
     static_assert(sizeof(chacha_key) <= sizeof(hash), "Size of hash must be at least that of chacha_key");
     tools::scrubbed_arr<char, HASH_SIZE> pwd_hash;
     crypto::cn_slow_hash(data, size, pwd_hash.data(), 0/*variant*/, 1/*prehashed*/);
-    memcpy(&key, pwd_hash.data(), sizeof(key));
+    memcpy(&unwrap(key), pwd_hash.data(), sizeof(key));
   }
 
   inline void generate_chacha_key(std::string password, chacha_key& key) {

src/crypto/crypto.cpp

@@ -124,9 +124,9 @@ namespace crypto {
       random_scalar(rng);
     }
     sec = rng;
-    sc_reduce32(&sec);  // reduce in case second round of keys (sendkeys)
+    sc_reduce32(&unwrap(sec));  // reduce in case second round of keys (sendkeys)
 
-    ge_scalarmult_base(&point, &sec);
+    ge_scalarmult_base(&point, &unwrap(sec));
     ge_p3_tobytes(&pub, &point);
 
     return rng;
@@ -139,10 +139,10 @@ namespace crypto {
 
   bool crypto_ops::secret_key_to_public_key(const secret_key &sec, public_key &pub) {
     ge_p3 point;
-    if (sc_check(&sec) != 0) {
+    if (sc_check(&unwrap(sec)) != 0) {
       return false;
     }
-    ge_scalarmult_base(&point, &sec);
+    ge_scalarmult_base(&point, &unwrap(sec));
     ge_p3_tobytes(&pub, &point);
     return true;
   }
@@ -155,7 +155,7 @@ namespace crypto {
     if (ge_frombytes_vartime(&point, &key1) != 0) {
       return false;
     }
-    ge_scalarmult(&point2, &key2, &point);
+    ge_scalarmult(&point2, &unwrap(key2), &point);
     ge_mul8(&point3, &point2);
     ge_p1p1_to_p2(&point2, &point3);
     ge_tobytes(&derivation, &point2);
@@ -199,7 +199,7 @@ namespace crypto {
     ec_scalar scalar;
     assert(sc_check(&base) == 0);
     derivation_to_scalar(derivation, output_index, scalar);
-    sc_add(&derived_key, &base, &scalar);
+    sc_add(&unwrap(derived_key), &unwrap(base), &scalar);
   }
 
   bool crypto_ops::derive_subaddress_public_key(const public_key &out_key, const key_derivation &derivation, std::size_t output_index, public_key &derived_key) {
@@ -254,7 +254,7 @@ namespace crypto {
     ge_scalarmult_base(&tmp3, &k);
     ge_p3_tobytes(&buf.comm, &tmp3);
     hash_to_scalar(&buf, sizeof(s_comm), sig.c);
-    sc_mulsub(&sig.r, &sig.c, &sec, &k);
+    sc_mulsub(&sig.r, &sig.c, &unwrap(sec), &k);
   }
 
   bool crypto_ops::check_signature(const hash &prefix_hash, const public_key &pub, const signature &sig) {
@@ -347,7 +347,7 @@ namespace crypto {
     hash_to_scalar(&buf, sizeof(buf), sig.c);
 
     // sig.r = k - sig.c*r
-    sc_mulsub(&sig.r, &sig.c, &r, &k);
+    sc_mulsub(&sig.r, &sig.c, &unwrap(r), &k);
   }
 
   bool crypto_ops::check_tx_proof(const hash &prefix_hash, const public_key &R, const public_key &A, const boost::optional<public_key> &B, const public_key &D, const signature &sig) {
@@ -451,7 +451,7 @@ namespace crypto {
     ge_p2 point2;
     assert(sc_check(&sec) == 0);
     hash_to_ec(pub, point);
-    ge_scalarmult(&point2, &sec, &point);
+    ge_scalarmult(&point2, &unwrap(sec), &point);
     ge_tobytes(&image, &point2);
   }
 
@@ -530,7 +530,7 @@ POP_WARNINGS
     }
     hash_to_scalar(buf.get(), rs_comm_size(pubs_count), h);
     sc_sub(&sig[sec_index].c, &h, &sum);
-    sc_mulsub(&sig[sec_index].r, &sig[sec_index].c, &sec, &k);
+    sc_mulsub(&sig[sec_index].r, &sig[sec_index].c, &unwrap(sec), &k);
   }
 
   bool crypto_ops::check_ring_signature(const hash &prefix_hash, const key_image &image,