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Cryptonight variant 4 aka CryptonightR #5126

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merged 3 commits into from Mar 4, 2019
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@@ -73,18 +73,18 @@ namespace crypto {
inline void generate_chacha_key(const void *data, size_t size, chacha_key& key, uint64_t kdf_rounds) {
static_assert(sizeof(chacha_key) <= sizeof(hash), "Size of hash must be at least that of chacha_key");
epee::mlocked<tools::scrubbed_arr<char, HASH_SIZE>> pwd_hash;
crypto::cn_slow_hash(data, size, pwd_hash.data(), 0/*variant*/, 0/*prehashed*/);
crypto::cn_slow_hash(data, size, pwd_hash.data(), 0/*variant*/, 0/*prehashed*/, 0/*height*/);
for (uint64_t n = 1; n < kdf_rounds; ++n)
crypto::cn_slow_hash(pwd_hash.data(), pwd_hash.size(), pwd_hash.data(), 0/*variant*/, 0/*prehashed*/);
crypto::cn_slow_hash(pwd_hash.data(), pwd_hash.size(), pwd_hash.data(), 0/*variant*/, 0/*prehashed*/, 0/*height*/);
memcpy(&unwrap(unwrap(key)), pwd_hash.data(), sizeof(key));
}

inline void generate_chacha_key_prehashed(const void *data, size_t size, chacha_key& key, uint64_t kdf_rounds) {
static_assert(sizeof(chacha_key) <= sizeof(hash), "Size of hash must be at least that of chacha_key");
epee::mlocked<tools::scrubbed_arr<char, HASH_SIZE>> pwd_hash;
crypto::cn_slow_hash(data, size, pwd_hash.data(), 0/*variant*/, 1/*prehashed*/);
crypto::cn_slow_hash(data, size, pwd_hash.data(), 0/*variant*/, 1/*prehashed*/, 0/*height*/);
for (uint64_t n = 1; n < kdf_rounds; ++n)
crypto::cn_slow_hash(pwd_hash.data(), pwd_hash.size(), pwd_hash.data(), 0/*variant*/, 0/*prehashed*/);
crypto::cn_slow_hash(pwd_hash.data(), pwd_hash.size(), pwd_hash.data(), 0/*variant*/, 0/*prehashed*/, 0/*height*/);
memcpy(&unwrap(unwrap(key)), pwd_hash.data(), sizeof(key));
}

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@@ -79,7 +79,7 @@ enum {
};

void cn_fast_hash(const void *data, size_t length, char *hash);
void cn_slow_hash(const void *data, size_t length, char *hash, int variant, int prehashed);
void cn_slow_hash(const void *data, size_t length, char *hash, int variant, int prehashed, uint64_t height);

void hash_extra_blake(const void *data, size_t length, char *hash);
void hash_extra_groestl(const void *data, size_t length, char *hash);
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@@ -71,12 +71,12 @@ namespace crypto {
return h;
}

inline void cn_slow_hash(const void *data, std::size_t length, hash &hash, int variant = 0) {
cn_slow_hash(data, length, reinterpret_cast<char *>(&hash), variant, 0/*prehashed*/);
inline void cn_slow_hash(const void *data, std::size_t length, hash &hash, int variant = 0, uint64_t height = 0) {
cn_slow_hash(data, length, reinterpret_cast<char *>(&hash), variant, 0/*prehashed*/, height);
}

inline void cn_slow_hash_prehashed(const void *data, std::size_t length, hash &hash, int variant = 0) {
cn_slow_hash(data, length, reinterpret_cast<char *>(&hash), variant, 1/*prehashed*/);
inline void cn_slow_hash_prehashed(const void *data, std::size_t length, hash &hash, int variant = 0, uint64_t height = 0) {
cn_slow_hash(data, length, reinterpret_cast<char *>(&hash), variant, 1/*prehashed*/, height);
}

inline void tree_hash(const hash *hashes, std::size_t count, hash &root_hash) {
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