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, 19 insertions, 11 deletions

diff --git a/src/crypto/slow-hash.c b/src/crypto/slow-hash.c
index 8c7dad8e0..d7dcbd274 100644
--- a/src/crypto/slow-hash.c
+++ b/src/crypto/slow-hash.c
@@ -564,11 +564,7 @@ void slow_hash_free_state(void)
  * @param length the length in bytes of the data
  * @param hash a pointer to a buffer in which the final 256 bit hash will be stored
  */
-void cn_slow_hash(const void *data, size_t length, char *hash, int variant) {
-    cn_slow_hash_pre(data,length,hash,variant,false);
-}
-
-void cn_slow_hash_pre(const void *data, size_t length, char *hash, int variant, bool prehashed)
+void cn_slow_hash(const void *data, size_t length, char *hash, int variant, int prehashed)
 {
     RDATA_ALIGN16 uint8_t expandedKey[240];  /* These buffers are aligned to use later with SSE functions */
 
@@ -909,7 +905,7 @@ STATIC INLINE void aes_pseudo_round_xor(const uint8_t *in, uint8_t *out, const u
 	}
 }
 
-void cn_slow_hash(const void *data, size_t length, char *hash, int variant)
+void cn_slow_hash(const void *data, size_t length, char *hash, int variant, int prehashed)
 {
     RDATA_ALIGN16 uint8_t expandedKey[240];
     RDATA_ALIGN16 uint8_t hp_state[MEMORY];
@@ -932,7 +928,11 @@ void cn_slow_hash(const void *data, size_t length, char *hash, int variant)
 
     /* CryptoNight Step 1:  Use Keccak1600 to initialize the 'state' (and 'text') buffers from the data. */
 
-    hash_process(&state.hs, data, length);
+    if (prehashed) {
+        memcpy(&state.hs, data, length);
+    } else {
+        hash_process(&state.hs, data, length);
+    }
     memcpy(text, state.init, INIT_SIZE_BYTE);
 
     VARIANT1_INIT64();
@@ -1105,7 +1105,7 @@ STATIC INLINE void xor_blocks(uint8_t* a, const uint8_t* b)
   U64(a)[1] ^= U64(b)[1];
 }
 
-void cn_slow_hash(const void *data, size_t length, char *hash, int variant)
+void cn_slow_hash(const void *data, size_t length, char *hash, int variant, int prehashed)
 {
     uint8_t text[INIT_SIZE_BYTE];
     uint8_t a[AES_BLOCK_SIZE];
@@ -1131,7 +1131,11 @@ void cn_slow_hash(const void *data, size_t length, char *hash, int variant)
     long_state = (uint8_t *)malloc(MEMORY);
 #endif
 
-    hash_process(&state.hs, data, length);
+    if (prehashed) {
+        memcpy(&state.hs, data, length);
+    } else {
+        hash_process(&state.hs, data, length);
+    }
     memcpy(text, state.init, INIT_SIZE_BYTE);
 
     VARIANT1_INIT64();
@@ -1289,7 +1293,7 @@ union cn_slow_hash_state {
 };
 #pragma pack(pop)
 
-void cn_slow_hash(const void *data, size_t length, char *hash, int variant) {
+void cn_slow_hash(const void *data, size_t length, char *hash, int variant, int prehashed) {
   uint8_t long_state[MEMORY];
   union cn_slow_hash_state state;
   uint8_t text[INIT_SIZE_BYTE];
@@ -1301,7 +1305,11 @@ void cn_slow_hash(const void *data, size_t length, char *hash, int variant) {
   uint8_t aes_key[AES_KEY_SIZE];
   oaes_ctx *aes_ctx;
 
-  hash_process(&state.hs, data, length);
+  if (prehashed) {
+    memcpy(&state.hs, data, length);
+  } else {
+    hash_process(&state.hs, data, length);
+  }
   memcpy(text, state.init, INIT_SIZE_BYTE);
   memcpy(aes_key, state.hs.b, AES_KEY_SIZE);
   aes_ctx = (oaes_ctx *) oaes_alloc();