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Add the possibility to export private view key for fast scan.

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On client startup the device asks for authorization to export the private view key.
If user agree, the client hold the private view key allowing a fast blockchain scan.
If the user does not agree, the blockchain scan is fully done via the device.
This commit is contained in:
cslashm 2018-03-26 12:55:48 +02:00 committed by wowario
parent ebbf84900d
commit 709a0557d2
No known key found for this signature in database
GPG key ID: 24DCBE762DE9C111
4 changed files with 39 additions and 50 deletions
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14
src/device/device.hpp
View file

@ -78,6 +78,7 @@ namespace hw {
return false;
}
class device {
protected:
std::string name;
@ -89,10 +90,12 @@ namespace hw {
virtual ~device() {}
explicit virtual operator bool() const = 0;
static const int SIGNATURE_REAL = 0;
static const int SIGNATURE_FAKE = 1;
enum device_mode {
NONE,
TRANSACTION_CREATE_REAL,
TRANSACTION_CREATE_FAKE,
TRANSACTION_PARSE
};
/* ======================================================================= */
/* SETUP/TEARDOWN */
@ -106,6 +109,9 @@ namespace hw {
virtual bool connect(void) = 0;
virtual bool disconnect(void) = 0;
virtual bool set_mode(device_mode mode) = 0;
/* ======================================================================= */
/* LOCKER */
/* ======================================================================= */

3
src/device/device_default.cpp
View file

@ -82,6 +82,9 @@ namespace hw {
dfns();
}
bool device_default::set_mode(device_mode mode) {
return true;
}
/* ======================================================================= */
/* LOCKER */

61
src/device/device_ledger.cpp
View file

@ -511,12 +511,13 @@ namespace hw {
return true;
}
bool device_ledger::get_secret_keys(crypto::secret_key &viewkey , crypto::secret_key &spendkey) {
bool device_ledger::get_secret_keys(crypto::secret_key &vkey , crypto::secret_key &skey) {
AUTO_LOCK_CMD();
memset(viewkey.data, 0x00, 32);
memset(spendkey.data, 0xFF, 32);
#ifdef DEBUG_HWDEVICE
//secret key are represented as fake key on the wallet side
memset(vkey.data, 0x00, 32);
memset(skey.data, 0xFF, 32);
//spcialkey, normal conf handled in decrypt
int offset;
reset_buffer();
@ -535,11 +536,21 @@ namespace hw {
this->length_send = offset;
this->exchange();
//clear key
memmove(ledger::viewkey.data, this->buffer_recv+64, 32);
memmove(ledger::spendkey.data, this->buffer_recv+96, 32);
//View key is retrievied, if allowed, to speed up blockchain parsing
memmove(this->viewkey.data, this->buffer_recv+0, 32);
if (is_fake_view_key(this->viewkey)) {
MDEBUG("Have Not view key");
this->has_view_key = false;
} else {
MDEBUG("Have view key");
this->has_view_key = true;
}
#ifdef DEBUG_HWDEVICE
memmove(dbg_viewkey.data, this->buffer_recv+0, 32);
memmove(dbg_spendkey.data, this->buffer_recv+32, 32);
#endif
return true;
}
@ -585,8 +596,6 @@ namespace hw {
bool device_ledger::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){
AUTO_LOCK_CMD();
int offset;
#ifdef DEBUG_HWDEVICE
const crypto::public_key pub_x = pub;
crypto::key_derivation derivation_x;
@ -643,7 +652,7 @@ namespace hw {
//pub key
memmove(derived_pub.data, &this->buffer_recv[0], 32);
}
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("derive_subaddress_public_key", "derived_pub", derived_pub_x.data, derived_pub.data);
#endif
@ -1033,7 +1042,7 @@ namespace hw {
bool device_ledger::generate_key_derivation(const crypto::public_key &pub, const crypto::secret_key &sec, crypto::key_derivation &derivation) {
AUTO_LOCK_CMD();
int offset;
bool r = false;
#ifdef DEBUG_HWDEVICE
const crypto::public_key pub_x = pub;
@ -1095,10 +1104,6 @@ namespace hw {
return r;
}
return true;
}
bool device_ledger::derivation_to_scalar(const crypto::key_derivation &derivation, const size_t output_index, crypto::ec_scalar &res) {
AUTO_LOCK_CMD();
int offset;
@ -1384,32 +1389,6 @@ namespace hw {
return true;
}
bool device_ledger::set_signature_mode(unsigned int sig_mode) {
AUTO_LOCK_CMD();
int offset ;
reset_buffer();
this->buffer_send[0] = 0x00;
this->buffer_send[1] = INS_SET_SIGNATURE_MODE;
this->buffer_send[2] = 0x01;
this->buffer_send[3] = 0x00;
this->buffer_send[4] = 0x00;
offset = 5;
//options
this->buffer_send[offset] = 0x00;
offset += 1;
//account
this->buffer_send[offset] = sig_mode;
offset += 1;
this->buffer_send[4] = offset-5;
this->length_send = offset;
this->exchange();
return true;
}
bool device_ledger::encrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key) {
AUTO_LOCK_CMD();
int offset;

1
src/device/device_ledger.hpp
View file

@ -138,6 +138,7 @@ namespace hw {
bool connect(void) override;
bool disconnect() override;
bool set_mode(device_mode mode) override;
/* ======================================================================= */
/* LOCKER */