Hash domain separation

2 files changed, 5 insertions, 10 deletions

diff --git a/src/wallet/ringdb.cpp b/src/wallet/ringdb.cpp
index 5e88ea788..dfeb987ca 100644
--- a/src/wallet/ringdb.cpp
+++ b/src/wallet/ringdb.cpp
@@ -35,6 +35,7 @@
 #include "misc_language.h"
 #include "wallet_errors.h"
 #include "ringdb.h"
+#include "cryptonote_config.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY
 #define MONERO_DEFAULT_LOG_CATEGORY "wallet.ringdb"
@@ -105,13 +106,11 @@ std::string get_rings_filename(boost::filesystem::path filename)
 
 static crypto::chacha_iv make_iv(const crypto::key_image &key_image, const crypto::chacha_key &key, uint8_t field)
 {
-  static const char salt[] = "ringdsb";
-
-  uint8_t buffer[sizeof(key_image) + sizeof(key) + sizeof(salt) + sizeof(field)];
+  uint8_t buffer[sizeof(key_image) + sizeof(key) + sizeof(config::HASH_KEY_RINGDB) + sizeof(field)];
   memcpy(buffer, &key_image, sizeof(key_image));
   memcpy(buffer + sizeof(key_image), &key, sizeof(key));
-  memcpy(buffer + sizeof(key_image) + sizeof(key), salt, sizeof(salt));
-  memcpy(buffer + sizeof(key_image) + sizeof(key) + sizeof(salt), &field, sizeof(field));
+  memcpy(buffer + sizeof(key_image) + sizeof(key), config::HASH_KEY_RINGDB, sizeof(config::HASH_KEY_RINGDB));
+  memcpy(buffer + sizeof(key_image) + sizeof(key) + sizeof(config::HASH_KEY_RINGDB), &field, sizeof(field));
   crypto::hash hash;
   // if field is 0, backward compat mode: hash without the field
   crypto::cn_fast_hash(buffer, sizeof(buffer) - !field, hash.data);
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 6d2fff17b..90682e60c 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -102,10 +102,6 @@ using namespace cryptonote;
 // used to target a given block weight (additional outputs may be added on top to build fee)
 #define TX_WEIGHT_TARGET(bytes) (bytes*2/3)
 
-// arbitrary, used to generate different hashes from the same input
-#define CHACHA8_KEY_TAIL 0x8c
-#define CACHE_KEY_TAIL 0x8d
-
 #define UNSIGNED_TX_PREFIX "Monero unsigned tx set\004"
 #define SIGNED_TX_PREFIX "Monero signed tx set\004"
 #define MULTISIG_UNSIGNED_TX_PREFIX "Monero multisig unsigned tx set\001"
@@ -3932,7 +3928,7 @@ void wallet2::setup_keys(const epee::wipeable_string &password)
   static_assert(HASH_SIZE == sizeof(crypto::chacha_key), "Mismatched sizes of hash and chacha key");
   epee::mlocked<tools::scrubbed_arr<char, HASH_SIZE+1>> cache_key_data;
   memcpy(cache_key_data.data(), &key, HASH_SIZE);
-  cache_key_data[HASH_SIZE] = CACHE_KEY_TAIL;
+  cache_key_data[HASH_SIZE] = config::HASH_KEY_WALLET_CACHE;
   cn_fast_hash(cache_key_data.data(), HASH_SIZE+1, (crypto::hash&)m_cache_key);
   get_ringdb_key();
 }