device_ledger.hpp

// Copyright (c) 2017-2018, The Monero Project
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#pragma once

#include <cstddef>
#include <string>
#include "device.hpp"
#include "device_io_hid.hpp"
#include <boost/thread/mutex.hpp>
#include <boost/thread/recursive_mutex.hpp>

namespace hw {

    namespace ledger {

    void register_all(std::map<std::string, std::unique_ptr<device>> &registry);

    #ifdef WITH_DEVICE_LEDGER

    namespace {
        bool apdu_verbose =true;
    }

    void set_apdu_verbose(bool verbose);

    class ABPkeys {
    public:
        rct::key Aout;
        rct::key Bout;
        bool     is_subaddress;
        size_t   index;
        rct::key Pout;
        rct::key AKout;
        ABPkeys(const rct::key& A, const rct::key& B, const bool is_subaddr,  size_t index, const rct::key& P,const rct::key& AK);
        ABPkeys(const ABPkeys& keys) ;
        ABPkeys() {index=0;is_subaddress=false;}
    };

    class Keymap {
    public:
        std::vector<ABPkeys> ABP;

        bool find(const rct::key& P, ABPkeys& keys) const;
        void add(const ABPkeys& keys);
        void clear();
        void log();
    };

    #define BUFFER_SEND_SIZE 262
    #define BUFFER_RECV_SIZE 262

    class device_ledger : public hw::device {
    private:
        // Locker for concurrent access
        mutable boost::recursive_mutex   device_locker;
        mutable boost::mutex   command_locker;

        //IO
        hw::io::device_io_hid hw_device;
        std::string   full_name;        
        unsigned int  length_send;
        unsigned char buffer_send[BUFFER_SEND_SIZE];
        unsigned int  length_recv;
        unsigned char buffer_recv[BUFFER_RECV_SIZE];
        unsigned int  sw;
        unsigned int  id;
        void logCMD(void);
        void logRESP(void);
        unsigned int exchange(unsigned int ok=0x9000, unsigned int mask=0xFFFF);
        unsigned int exchange_wait_on_input(unsigned int ok=0x9000, unsigned int mask=0xFFFF);
        void reset_buffer(void);
        int  set_command_header(unsigned char ins, unsigned char p1 = 0x00, unsigned char p2 = 0x00);
        int  set_command_header_noopt(unsigned char ins, unsigned char p1 = 0x00, unsigned char p2 = 0x00);
        void send_simple(unsigned char ins, unsigned char p1 = 0x00);


        // hw running mode
        device_mode mode;
        // map public destination key to ephemeral destination key
        Keymap key_map;

        // To speed up blockchain parsing the view key maybe handle here.
        crypto::secret_key viewkey;
        bool has_view_key;
        
        //extra debug
        #ifdef DEBUG_HWDEVICE
        device *controle_device;
        #endif

    public:
        device_ledger();
        ~device_ledger();

        device_ledger(const device_ledger &device) = delete ;
        device_ledger& operator=(const device_ledger &device) = delete;

        explicit operator bool() const override {return this->connected(); }

        bool  reset(void);

        /* ======================================================================= */
        /*                              SETUP/TEARDOWN                             */
        /* ======================================================================= */
        bool set_name(const std::string &name) override;

        const std::string get_name() const override;
        bool init(void) override;
        bool release() override;
        bool connect(void) override;
        bool disconnect() override;
        bool connected(void) const;

        bool set_mode(device_mode mode) override;

        device_type get_type() const override {return device_type::LEDGER;};
        device_protocol_t device_protocol() const override { return PROTOCOL_PROXY; };

        /* ======================================================================= */
        /*  LOCKER                                                                 */
        /* ======================================================================= */ 
        void lock(void)  override;
        void unlock(void) override;
        bool try_lock(void) override;

        /* ======================================================================= */
        /*                             WALLET & ADDRESS                            */
        /* ======================================================================= */
        bool  get_public_address(cryptonote::account_public_address &pubkey) override;
        bool  get_secret_keys(crypto::secret_key &viewkey , crypto::secret_key &spendkey) override;
        bool  generate_chacha_key(const cryptonote::account_keys &keys, crypto::chacha_key &key, uint64_t kdf_rounds) override;


        /* ======================================================================= */
        /*                               SUB ADDRESS                               */
        /* ======================================================================= */
        bool  derive_subaddress_public_key(const crypto::public_key &pub, const crypto::key_derivation &derivation, const std::size_t output_index,  crypto::public_key &derived_pub) override;
        crypto::public_key  get_subaddress_spend_public_key(const cryptonote::account_keys& keys, const cryptonote::subaddress_index& index) override;
        std::vector<crypto::public_key>  get_subaddress_spend_public_keys(const cryptonote::account_keys &keys, uint32_t account, uint32_t begin, uint32_t end) override;
        cryptonote::account_public_address  get_subaddress(const cryptonote::account_keys& keys, const cryptonote::subaddress_index &index) override;
        crypto::secret_key  get_subaddress_secret_key(const crypto::secret_key &sec, const cryptonote::subaddress_index &index) override;

        /* ======================================================================= */
        /*                            DERIVATION & KEY                             */
        /* ======================================================================= */
        bool  verify_keys(const crypto::secret_key &secret_key, const crypto::public_key &public_key) override;
        bool  scalarmultKey(rct::key & aP, const rct::key &P, const rct::key &a) override;
        bool  scalarmultBase(rct::key &aG, const rct::key &a) override;
        bool  sc_secret_add(crypto::secret_key &r, const crypto::secret_key &a, const crypto::secret_key &b) override;
        crypto::secret_key  generate_keys(crypto::public_key &pub, crypto::secret_key &sec, const crypto::secret_key& recovery_key = crypto::secret_key(), bool recover = false) override;
        bool  generate_key_derivation(const crypto::public_key &pub, const crypto::secret_key &sec, crypto::key_derivation &derivation) override;
        bool  conceal_derivation(crypto::key_derivation &derivation, const crypto::public_key &tx_pub_key, const std::vector<crypto::public_key> &additional_tx_pub_keys, const crypto::key_derivation &main_derivation, const std::vector<crypto::key_derivation> &additional_derivations) override;
        bool  derivation_to_scalar(const crypto::key_derivation &derivation, const size_t output_index, crypto::ec_scalar &res) override;
        bool  derive_secret_key(const crypto::key_derivation &derivation, const std::size_t output_index, const crypto::secret_key &sec,  crypto::secret_key &derived_sec) override;
        bool  derive_public_key(const crypto::key_derivation &derivation, const std::size_t output_index, const crypto::public_key &pub,  crypto::public_key &derived_pub) override;
        bool  secret_key_to_public_key(const crypto::secret_key &sec, crypto::public_key &pub) override;
        bool  generate_key_image(const crypto::public_key &pub, const crypto::secret_key &sec, crypto::key_image &image) override;

        /* ======================================================================= */
        /*                               TRANSACTION                               */
        /* ======================================================================= */

        bool  open_tx(crypto::secret_key &tx_key) override;

        bool  encrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key) override;

        bool  ecdhEncode(rct::ecdhTuple & unmasked, const rct::key & sharedSec) override;
        bool  ecdhDecode(rct::ecdhTuple & masked, const rct::key & sharedSec) override;

        bool  add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const size_t real_output_index,
                                     const rct::key &amount_key,  const crypto::public_key &out_eph_public_key) override;


        bool  mlsag_prehash(const std::string &blob, size_t inputs_size, size_t outputs_size, const rct::keyV &hashes, const rct::ctkeyV &outPk, rct::key &prehash) override;
        bool  mlsag_prepare(const rct::key &H, const rct::key &xx, rct::key &a, rct::key &aG, rct::key &aHP, rct::key &rvII) override;
        bool  mlsag_prepare(rct::key &a, rct::key &aG) override;
        bool  mlsag_hash(const rct::keyV &long_message, rct::key &c) override;
        bool  mlsag_sign( const rct::key &c, const rct::keyV &xx, const rct::keyV &alpha, const size_t rows, const size_t dsRows, rct::keyV &ss) override;

        bool  close_tx(void) override;

    };


    #ifdef DEBUG_HWDEVICE
    extern crypto::secret_key dbg_viewkey;
    extern crypto::secret_key dbg_spendkey;
    #endif

    #endif  //WITH_DEVICE_LEDGER
  }

}