extract some basic code from libcryptonote_core into libcryptonote_basic

1 files changed, 213 insertions, 0 deletions

diff --git a/src/cryptonote_basic/cryptonote_format_utils.h b/src/cryptonote_basic/cryptonote_format_utils.h
new file mode 100644
index 000000000..3ac456bb8
--- /dev/null
+++ b/src/cryptonote_basic/cryptonote_format_utils.h
@@ -0,0 +1,213 @@
+// Copyright (c) 2014-2016, The Monero Project
+// 
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+//    of conditions and the following disclaimer in the documentation and/or other
+//    materials provided with the distribution.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
+
+#pragma once
+#include "cryptonote_protocol/cryptonote_protocol_defs.h"
+#include "cryptonote_basic_impl.h"
+#include "account.h"
+#include "include_base_utils.h"
+#include "crypto/crypto.h"
+#include "crypto/hash.h"
+#include "ringct/rctOps.h"
+
+namespace cryptonote
+{
+  //---------------------------------------------------------------
+  void get_transaction_prefix_hash(const transaction_prefix& tx, crypto::hash& h);
+  crypto::hash get_transaction_prefix_hash(const transaction_prefix& tx);
+  bool parse_and_validate_tx_from_blob(const blobdata& tx_blob, transaction& tx, crypto::hash& tx_hash, crypto::hash& tx_prefix_hash);
+  bool parse_and_validate_tx_from_blob(const blobdata& tx_blob, transaction& tx);
+  bool encrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key);
+  bool decrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key);
+
+  template<typename T>
+  bool find_tx_extra_field_by_type(const std::vector<tx_extra_field>& tx_extra_fields, T& field, size_t index = 0)
+  {
+    auto it = std::find_if(tx_extra_fields.begin(), tx_extra_fields.end(), [&index](const tx_extra_field& f) { return typeid(T) == f.type() && !index--; });
+    if(tx_extra_fields.end() == it)
+      return false;
+
+    field = boost::get<T>(*it);
+    return true;
+  }
+
+  bool parse_tx_extra(const std::vector<uint8_t>& tx_extra, std::vector<tx_extra_field>& tx_extra_fields);
+  crypto::public_key get_tx_pub_key_from_extra(const std::vector<uint8_t>& tx_extra, size_t pk_index = 0);
+  crypto::public_key get_tx_pub_key_from_extra(const transaction_prefix& tx, size_t pk_index = 0);
+  crypto::public_key get_tx_pub_key_from_extra(const transaction& tx, size_t pk_index = 0);
+  bool add_tx_pub_key_to_extra(transaction& tx, const crypto::public_key& tx_pub_key);
+  bool add_extra_nonce_to_tx_extra(std::vector<uint8_t>& tx_extra, const blobdata& extra_nonce);
+  bool remove_field_from_tx_extra(std::vector<uint8_t>& tx_extra, const std::type_info &type);
+  void set_payment_id_to_tx_extra_nonce(blobdata& extra_nonce, const crypto::hash& payment_id);
+  void set_encrypted_payment_id_to_tx_extra_nonce(blobdata& extra_nonce, const crypto::hash8& payment_id);
+  bool get_payment_id_from_tx_extra_nonce(const blobdata& extra_nonce, crypto::hash& payment_id);
+  bool get_encrypted_payment_id_from_tx_extra_nonce(const blobdata& extra_nonce, crypto::hash8& payment_id);
+  bool is_out_to_acc(const account_keys& acc, const txout_to_key& out_key, const crypto::public_key& tx_pub_key, size_t output_index);
+  bool is_out_to_acc_precomp(const crypto::public_key& spend_public_key, const txout_to_key& out_key, const crypto::key_derivation& derivation, size_t output_index);
+  bool lookup_acc_outs(const account_keys& acc, const transaction& tx, const crypto::public_key& tx_pub_key, std::vector<size_t>& outs, uint64_t& money_transfered);
+  bool lookup_acc_outs(const account_keys& acc, const transaction& tx, std::vector<size_t>& outs, uint64_t& money_transfered);
+  bool get_tx_fee(const transaction& tx, uint64_t & fee);
+  uint64_t get_tx_fee(const transaction& tx);
+  bool generate_key_image_helper(const account_keys& ack, const crypto::public_key& tx_public_key, size_t real_output_index, keypair& in_ephemeral, crypto::key_image& ki);
+  void get_blob_hash(const blobdata& blob, crypto::hash& res);
+  crypto::hash get_blob_hash(const blobdata& blob);
+  std::string short_hash_str(const crypto::hash& h);
+
+  crypto::hash get_transaction_hash(const transaction& t);
+  bool get_transaction_hash(const transaction& t, crypto::hash& res);
+  bool get_transaction_hash(const transaction& t, crypto::hash& res, size_t& blob_size);
+  bool get_transaction_hash(const transaction& t, crypto::hash& res, size_t* blob_size);
+  blobdata get_block_hashing_blob(const block& b);
+  bool get_block_hash(const block& b, crypto::hash& res);
+  crypto::hash get_block_hash(const block& b);
+  bool get_block_longhash(const block& b, crypto::hash& res, uint64_t height);
+  crypto::hash get_block_longhash(const block& b, uint64_t height);
+  bool parse_and_validate_block_from_blob(const blobdata& b_blob, block& b);
+  bool get_inputs_money_amount(const transaction& tx, uint64_t& money);
+  uint64_t get_outs_money_amount(const transaction& tx);
+  bool check_inputs_types_supported(const transaction& tx);
+  bool check_outs_valid(const transaction& tx);
+  bool parse_amount(uint64_t& amount, const std::string& str_amount);
+
+  bool check_money_overflow(const transaction& tx);
+  bool check_outs_overflow(const transaction& tx);
+  bool check_inputs_overflow(const transaction& tx);
+  uint64_t get_block_height(const block& b);
+  std::vector<uint64_t> relative_output_offsets_to_absolute(const std::vector<uint64_t>& off);
+  std::vector<uint64_t> absolute_output_offsets_to_relative(const std::vector<uint64_t>& off);
+  std::string print_money(uint64_t amount);
+  //---------------------------------------------------------------
+  template<class t_object>
+  bool t_serializable_object_to_blob(const t_object& to, blobdata& b_blob)
+  {
+    std::stringstream ss;
+    binary_archive<true> ba(ss);
+    bool r = ::serialization::serialize(ba, const_cast<t_object&>(to));
+    b_blob = ss.str();
+    return r;
+  }
+  //---------------------------------------------------------------
+  template<class t_object>
+  blobdata t_serializable_object_to_blob(const t_object& to)
+  {
+    blobdata b;
+    t_serializable_object_to_blob(to, b);
+    return b;
+  }
+  //---------------------------------------------------------------
+  template<class t_object>
+  bool get_object_hash(const t_object& o, crypto::hash& res)
+  {
+    get_blob_hash(t_serializable_object_to_blob(o), res);
+    return true;
+  }
+  //---------------------------------------------------------------
+  template<class t_object>
+  size_t get_object_blobsize(const t_object& o)
+  {
+    blobdata b = t_serializable_object_to_blob(o);
+    return b.size();
+  }
+  //---------------------------------------------------------------
+  template<class t_object>
+  bool get_object_hash(const t_object& o, crypto::hash& res, size_t& blob_size)
+  {
+    blobdata bl = t_serializable_object_to_blob(o);
+    blob_size = bl.size();
+    get_blob_hash(bl, res);
+    return true;
+  }
+  //---------------------------------------------------------------
+  template <typename T>
+  std::string obj_to_json_str(T& obj)
+  {
+    std::stringstream ss;
+    json_archive<true> ar(ss, true);
+    bool r = ::serialization::serialize(ar, obj);
+    CHECK_AND_ASSERT_MES(r, "", "obj_to_json_str failed: serialization::serialize returned false");
+    return ss.str();
+  }
+  //---------------------------------------------------------------
+  // 62387455827 -> 455827 + 7000000 + 80000000 + 300000000 + 2000000000 + 60000000000, where 455827 <= dust_threshold
+  template<typename chunk_handler_t, typename dust_handler_t>
+  void decompose_amount_into_digits(uint64_t amount, uint64_t dust_threshold, const chunk_handler_t& chunk_handler, const dust_handler_t& dust_handler)
+  {
+    if (0 == amount)
+    {
+      return;
+    }
+
+    bool is_dust_handled = false;
+    uint64_t dust = 0;
+    uint64_t order = 1;
+    while (0 != amount)
+    {
+      uint64_t chunk = (amount % 10) * order;
+      amount /= 10;
+      order *= 10;
+
+      if (dust + chunk <= dust_threshold)
+      {
+        dust += chunk;
+      }
+      else
+      {
+        if (!is_dust_handled && 0 != dust)
+        {
+          dust_handler(dust);
+          is_dust_handled = true;
+        }
+        if (0 != chunk)
+        {
+          chunk_handler(chunk);
+        }
+      }
+    }
+
+    if (!is_dust_handled && 0 != dust)
+    {
+      dust_handler(dust);
+    }
+  }
+  //---------------------------------------------------------------
+  blobdata block_to_blob(const block& b);
+  bool block_to_blob(const block& b, blobdata& b_blob);
+  blobdata tx_to_blob(const transaction& b);
+  bool tx_to_blob(const transaction& b, blobdata& b_blob);
+  void get_tx_tree_hash(const std::vector<crypto::hash>& tx_hashes, crypto::hash& h);
+  crypto::hash get_tx_tree_hash(const std::vector<crypto::hash>& tx_hashes);
+  crypto::hash get_tx_tree_hash(const block& b);
+  bool is_valid_decomposed_amount(uint64_t amount);
+
+#define CHECKED_GET_SPECIFIC_VARIANT(variant_var, specific_type, variable_name, fail_return_val) \
+  CHECK_AND_ASSERT_MES(variant_var.type() == typeid(specific_type), fail_return_val, "wrong variant type: " << variant_var.type().name() << ", expected " << typeid(specific_type).name()); \
+  specific_type& variable_name = boost::get<specific_type>(variant_var);
+
+}