chacha: call prehashed version explicitly as generate_chacha_key_prehashed

hash: add prehashed version cn_slow_hash_prehashed
slow-hash: let cn_slow_hash take 4th parameter for deciding prehashed or not
slow-hash: add support for prehashed version for the other 3 platforms

1 files changed, 9 insertions, 2 deletions

diff --git a/src/crypto/chacha.h b/src/crypto/chacha.h
index 22da53bd0..7a120931a 100644
--- a/src/crypto/chacha.h
+++ b/src/crypto/chacha.h
@@ -69,10 +69,17 @@ namespace crypto {
     chacha20(data, length, key.data(), reinterpret_cast<const uint8_t*>(&iv), cipher);
   }
 
-  inline void generate_chacha_key(const void *data, size_t size, chacha_key& key, int cn_variant = 0, bool prehashed=false) {
+  inline void generate_chacha_key(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_pre(data, size, pwd_hash.data(), cn_variant, prehashed);
+    crypto::cn_slow_hash(data, size, pwd_hash.data(), 0/*variant*/, 0/*prehashed*/);
+    memcpy(&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));
   }