Commit Graph

152 Commits

Author SHA1 Message Date
moneromooo-monero
fff871a455
gen_multisig: generates multisig wallets if participants trust each other 2017-12-17 16:12:06 +00:00
moneromooo-monero
4c313324b1
Add N/N multisig tx generation and signing
Scheme by luigi1111:

    Multisig for RingCT on Monero

    2 of 2

    User A (coordinator):
    Spendkey b,B
    Viewkey a,A (shared)

    User B:
    Spendkey c,C
    Viewkey a,A (shared)

    Public Address: C+B, A

    Both have their own watch only wallet via C+B, a

    A will coordinate spending process (though B could easily as well, coordinator is more needed for more participants)

    A and B watch for incoming outputs

    B creates "half" key images for discovered output D:
    I2_D = (Hs(aR)+c) * Hp(D)

    B also creates 1.5 random keypairs (one scalar and 2 pubkeys; one on base G and one on base Hp(D)) for each output, storing the scalar(k) (linked to D),
    and sending the pubkeys with I2_D.

    A also creates "half" key images:
    I1_D = (Hs(aR)+b) * Hp(D)

    Then I_D = I1_D + I2_D

    Having I_D allows A to check spent status of course, but more importantly allows A to actually build a transaction prefix (and thus transaction).

    A builds the transaction until most of the way through MLSAG_Gen, adding the 2 pubkeys (per input) provided with I2_D
    to his own generated ones where they are needed (secret row L, R).

    At this point, A has a mostly completed transaction (but with an invalid/incomplete signature). A sends over the tx and includes r,
    which allows B (with the recipient's address) to verify the destination and amount (by reconstructing the stealth address and decoding ecdhInfo).

    B then finishes the signature by computing ss[secret_index][0] = ss[secret_index][0] + k - cc[secret_index]*c (secret indices need to be passed as well).

    B can then broadcast the tx, or send it back to A for broadcasting. Once B has completed the signing (and verified the tx to be valid), he can add the full I_D
    to his cache, allowing him to verify spent status as well.

    NOTE:
    A and B *must* present key A and B to each other with a valid signature proving they know a and b respectively.
    Otherwise, trickery like the following becomes possible:
    A creates viewkey a,A, spendkey b,B, and sends a,A,B to B.
    B creates a fake key C = zG - B. B sends C back to A.
    The combined spendkey C+B then equals zG, allowing B to spend funds at any time!
    The signature fixes this, because B does not know a c corresponding to C (and thus can't produce a signature).

    2 of 3

    User A (coordinator)
    Shared viewkey a,A
    "spendkey" j,J

    User B
    "spendkey" k,K

    User C
    "spendkey" m,M

    A collects K and M from B and C
    B collects J and M from A and C
    C collects J and K from A and B

    A computes N = nG, n = Hs(jK)
    A computes O = oG, o = Hs(jM)

    B anc C compute P = pG, p = Hs(kM) || Hs(mK)
    B and C can also compute N and O respectively if they wish to be able to coordinate

    Address: N+O+P, A

    The rest follows as above. The coordinator possesses 2 of 3 needed keys; he can get the other
    needed part of the signature/key images from either of the other two.

    Alternatively, if secure communication exists between parties:
    A gives j to B
    B gives k to C
    C gives m to A

    Address: J+K+M, A

    3 of 3

    Identical to 2 of 2, except the coordinator must collect the key images from both of the others.
    The transaction must also be passed an additional hop: A -> B -> C (or A -> C -> B), who can then broadcast it
    or send it back to A.

    N-1 of N

    Generally the same as 2 of 3, except participants need to be arranged in a ring to pass their keys around
    (using either the secure or insecure method).
    For example (ignoring viewkey so letters line up):
    [4 of 5]
    User: spendkey
    A: a
    B: b
    C: c
    D: d
    E: e

    a -> B, b -> C, c -> D, d -> E, e -> A

    Order of signing does not matter, it just must reach n-1 users. A "remaining keys" list must be passed around with
    the transaction so the signers know if they should use 1 or both keys.
    Collecting key image parts becomes a little messy, but basically every wallet sends over both of their parts with a tag for each.
    Thia way the coordinating wallet can keep track of which images have been added and which wallet they come from. Reasoning:
    1. The key images must be added only once (coordinator will get key images for key a from both A and B, he must add only one to get the proper key actual key image)
    2. The coordinator must keep track of which helper pubkeys came from which wallet (discussed in 2 of 2 section). The coordinator
    must choose only one set to use, then include his choice in the "remaining keys" list so the other wallets know which of their keys to use.

    You can generalize it further to N-2 of N or even M of N, but I'm not sure there's legitimate demand to justify the complexity. It might
    also be straightforward enough to support with minimal changes from N-1 format.
    You basically just give each user additional keys for each additional "-1" you desire. N-2 would be 3 keys per user, N-3 4 keys, etc.

The process is somewhat cumbersome:

To create a N/N multisig wallet:

 - each participant creates a normal wallet
 - each participant runs "prepare_multisig", and sends the resulting string to every other participant
 - each participant runs "make_multisig N A B C D...", with N being the threshold and A B C D... being the strings received from other participants (the threshold must currently equal N)

As txes are received, participants' wallets will need to synchronize so that those new outputs may be spent:

 - each participant runs "export_multisig FILENAME", and sends the FILENAME file to every other participant
 - each participant runs "import_multisig A B C D...", with A B C D... being the filenames received from other participants

Then, a transaction may be initiated:

 - one of the participants runs "transfer ADDRESS AMOUNT"
 - this partly signed transaction will be written to the "multisig_monero_tx" file
 - the initiator sends this file to another participant
 - that other participant runs "sign_multisig multisig_monero_tx"
 - the resulting transaction is written to the "multisig_monero_tx" file again
 - if the threshold was not reached, the file must be sent to another participant, until enough have signed
 - the last participant to sign runs "submit_multisig multisig_monero_tx" to relay the transaction to the Monero network
2017-12-17 16:11:57 +00:00
moneromooo-monero
3dffe71b72
new wipeable_string class to replace std::string passphrases 2017-11-27 22:25:57 +00:00
Riccardo Spagni
4c90d638bc
Merge pull request #2823
0d149f70 Add out-of-bound exceptions and handle them in RPC (Michał Sałaban)
2017-11-25 19:53:12 +02:00
Riccardo Spagni
539f511eb1
Merge pull request #2368
b0b7e0f0 Spend proof without txkey (stoffu)
2017-11-25 19:48:56 +02:00
Riccardo Spagni
d80a3e5c38
Merge pull request #2788
9739da1e wallet_rpc_server: new relay_tx command (moneromooo-monero)
01dc8297 wallet: transfer RPC can now return tx metadata (pending_tx) (moneromooo-monero)
83fa9047 serialization: add std::set and std::unordered_set serialization (moneromooo-monero)
2017-11-25 19:47:05 +02:00
moneromooo-monero
9739da1e84
wallet_rpc_server: new relay_tx command
It takes a full tx+metadata hex string as input
2017-11-24 14:03:55 +00:00
moneromooo-monero
01dc829784
wallet: transfer RPC can now return tx metadata (pending_tx) 2017-11-24 14:03:52 +00:00
stoffu
b0b7e0f09a
Spend proof without txkey 2017-11-21 16:49:16 +09:00
stoffu
be1c01298a
fix for tx proof: use exception instead of error_str when signature gen failed 2017-11-21 16:48:22 +09:00
Riccardo Spagni
8d9e4920fc
Merge pull request #2768
ef941855 Wallet RPC: Add prompt-for-password flag (Tim L)
2017-11-20 12:08:31 +09:00
stoffu
998777ecd7
Tx proof (revised):
- refactoring: proof generation/checking code was moved from simplewallet.cpp to wallet2.cpp
- allow an arbitrary message to be signed together with txid
- introduce two types (outbound & inbound) of tx proofs; with the same syntax, inbound is selected when <address> belongs to this wallet, outbound otherwise. see GitHub thread for more discussion
- wallet RPC: added get_tx_key, check_tx_key, get_tx_proof, check_tx_proof
- wallet API: moved WalletManagerImpl::checkPayment to Wallet::checkTxKey, added Wallet::getTxProof/checkTxProof
- get_tx_key/check_tx_key: handle additional tx keys by concatenating them into a single string
2017-11-18 20:44:27 +09:00
Tim L
ef941855ae Wallet RPC: Add prompt-for-password flag 2017-11-15 13:21:55 -05:00
Michał Sałaban
0d149f708f Add out-of-bound exceptions and handle them in RPC 2017-11-15 16:35:14 +01:00
stoffu
c4587e83f8
simplewallet: wrong ns for input_line in sweep_single (fix #2634) 2017-11-15 20:45:58 +09:00
stoffu
b738f4b59d
wallet: add sweep_single command 2017-11-15 17:51:54 +09:00
Howard Chu
987eb662bf
More missed readline dependencies thru scoped_message_writer 2017-11-14 22:43:52 +00:00
moneromooo-monero
437421ce42
wallet: move some scoped_message_writer calls from the libs 2017-11-14 17:06:29 +00:00
moneromooo-monero
e89994e98f
wallet: rejig to avoid prompting in wallet2
wallet2 is a library, and should not prompt for stdin. Instead,
pass a function so simplewallet can prompt on stdin, and a GUI
might display a window, etc.
2017-11-14 17:06:26 +00:00
Riccardo Spagni
f48aeab5c4
Merge pull request #2756
0bf09154 Fix file permission issue (Tim L)
2017-11-14 16:02:28 +02:00
moneromooo-monero
da8b60cbbf
simplewallet: reject attempts to use too low mixin early
This yields a clear error message rather then some possibly
confusing more technical errors down the line
2017-11-14 13:12:39 +00:00
moneromooo-monero
ccf53a566c
track double spending in the txpool
Transactions in the txpool are marked when another transaction
is seen double spending one or more of its inputs.
This is then exposed wherever appropriate.

Note that being marked with this "double spend seen" flag does
NOT mean this transaction IS a double spend and will never be
mined: it just means that the network has seen at least another
transaction spending at least one of the same inputs, so care
should be taken to wait for a few confirmations before acting
upon that transaction (ie, mostly of use for merchants wanting
to accept unconfirmed transactions).
2017-11-06 00:05:44 +00:00
Riccardo Spagni
3dd31d33fa
Merge pull request #2605
b370ef54 Wallet: Descriptions through new commands 'set_description', 'get_description' (rbrunner7)
2017-11-06 01:56:06 +02:00
Tim L
0bf0915446 Fix file permission issue
This branch fixes a file permission issue introduced by 69c37200aa
2017-11-03 11:27:50 -04:00
Riccardo Spagni
54463b33b3
Merge pull request #2723
69c37200 RPC Add cross origin resource sharing support (Tim L)
2017-10-31 20:38:38 +02:00
Tim L
69c37200aa RPC Add cross origin resource sharing support 2017-10-30 13:55:56 -04:00
Michał Sałaban
fab3b7221b Add more specific RPC error codes 2017-10-23 04:27:02 +02:00
rbrunner7
b370ef54b9 Wallet: Descriptions through new commands 'set_description', 'get_description' 2017-10-16 22:24:09 +02:00
Vasil Dimov
4d35ad7603
Fix compiler warnings with Clang 6.0.0.
monero/src/cryptonote_protocol/block_queue.cpp:208:44: error:
      suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
  static const boost::uuids::uuid uuid0 = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
                                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                           {                                          }

monero/src/wallet/wallet_rpc_server.cpp:1895:43: error:
      lambda capture 'wal' is not used [-Werror,-Wunused-lambda-capture]
  tools::signal_handler::install([&wrpc, &wal](int) {
                                          ^

monero/src/cryptonote_protocol/cryptonote_protocol_handler.inl:1616:40: error:
      lambda capture 'arg' is not used [-Werror,-Wunused-lambda-capture]
    m_p2p->for_each_connection([this, &arg, &fluffy_arg, &exclude_context, &fullConnections...
                                       ^

monero/src/cryptonote_protocol/cryptonote_protocol_handler.inl:1616:46: error:
      lambda capture 'fluffy_arg' is not used [-Werror,-Wunused-lambda-capture]
    m_p2p->for_each_connection([this, &arg, &fluffy_arg, &exclude_context, &fullConnections...
                                             ^

monero/src/blockchain_utilities/blockchain_export.cpp:181:3: error:
      bool literal returned from 'main' [-Werror,-Wmain]
  CHECK_AND_ASSERT_MES(r, false, "Failed to initialize source blockchain storage");
  ^                       ~~~~~
monero/contrib/epee/include/misc_log_ex.h:180:97: note:
      expanded from macro 'CHECK_AND_ASSERT_MES'
  ...fail_ret_val, message)   do{if(!(expr)) {LOG_ERROR(message); return fail_ret_val;};}while(0)
                                                                  ^      ~~~~~~~~~~~~
monero/src/blockchain_utilities/blockchain_export.cpp:195:3: error:
      bool literal returned from 'main' [-Werror,-Wmain]
  CHECK_AND_ASSERT_MES(r, false, "Failed to export blockchain raw data");
  ^                       ~~~~~
monero/contrib/epee/include/misc_log_ex.h:180:97: note:
      expanded from macro 'CHECK_AND_ASSERT_MES'
  ...fail_ret_val, message)   do{if(!(expr)) {LOG_ERROR(message); return fail_ret_val;};}while(0)
                                                                  ^      ~~~~~~~~~~~~
2017-10-15 22:02:24 +03:00
Riccardo Spagni
71253c1dcd
Merge pull request #2592
dc19659d Remove network_address_base which has been merged with ipv4_network_address in 8b006877 (Michał Sałaban)
2183ade0 Don't try to create wallet-dir when it's not given, don't crash if wallet-dir already exists. (Michał Sałaban)
2017-10-15 18:39:13 +02:00
kenshi84
53ad5a0f42
Subaddresses 2017-10-07 13:06:21 +09:00
Michał Sałaban
2183ade0c4 Don't try to create wallet-dir when it's not given, don't crash if wallet-dir already exists. 2017-10-07 02:04:33 +02:00
moneromooo-monero
5d65a75b69
move checkpoints in a separate library 2017-09-25 21:16:26 +01:00
Riccardo Spagni
c2346c6c59
Merge pull request #2424
28b72b6e tx_pool: pre-init tvc.m_verifivation_failed before processing (moneromooo-monero)
50a629b2 core_tests: catch (impossible in practice) tx extra api failure (moneromooo-monero)
fee15ef1 wallet2: catch failure to parse address (moneromooo-monero)
1399e26d net_peerlist: remove dead code (moneromooo-monero)
50e09698 tx_pool: guard against failure getting tx hash (moneromooo-monero)
54cc209a wallet_rpc_server: catch failure to create directory (moneromooo-monero)
3e55099c wallet_rpc_server: init m_vm to NULL in ctor (moneromooo-monero)
7d0dde5e wallet_args: remove redundant default value for --log-file (moneromooo-monero)
ed4a3350 wallet2: catch failure to save keys file (moneromooo-monero)
44434c8a wallet2_api: check whether dynamic_cast returns NULL (moneromooo-monero)
92f2f687 core: check return value from parse_hexstr_to_binbuff (moneromooo-monero)
5475692e wallet2_api: remove an unused, uninitialized, field (moneromooo-monero)
a7ba3de1 libwallet_api_tests: initialize newblock_triggered on reset (moneromooo-monero)
b2763ace wallet2_api: init error code to "no error" in the ctor (moneromooo-monero)
b5faac53 get_blockchain_top now returns void (moneromooo-monero)
2e44d8f2 wallet_rpc_server: guard against exceptions (moneromooo-monero)
4230876b simplewallet: guard against I/O exceptions (moneromooo-monero)
06c1e057 daemon: initialize decode_as_json in RPC request (moneromooo-monero)
11f71af5 http_base: init size_t in http_request_info ctor (moneromooo-monero)
2017-09-25 16:52:27 +02:00
Riccardo Spagni
5953724f69
Merge pull request #2443
ffe27127 wallet_rpc_server: fix index for newly added address book entry (moneromooo-monero)
2017-09-25 16:51:07 +02:00
moneromooo-monero
54cc209a5e
wallet_rpc_server: catch failure to create directory
CID 175281
2017-09-25 15:48:39 +01:00
moneromooo-monero
3e55099cb2
wallet_rpc_server: init m_vm to NULL in ctor
CID 175279
2017-09-25 15:48:36 +01:00
moneromooo-monero
2e44d8f23c
wallet_rpc_server: guard against exceptions
CID 175305
2017-09-25 15:48:10 +01:00
moneromooo-monero
ffe2712726
wallet_rpc_server: fix index for newly added address book entry 2017-09-13 11:02:06 +01:00
Lee Clagett
9c83f8063d Do not create file when RPC user/pass is given and use file locking 2017-08-30 17:39:59 -04:00
Riccardo Spagni
9e6bcbc014
Merge pull request #2286
8655ba04 wallet_rpc_server: adjust small ring sizes to 5 for v6 (moneromooo-monero)
2017-08-15 20:55:30 +02:00
Riccardo Spagni
a861cbb465
Merge pull request #2279
359517c7 wallet_rpc_server: fix possible privacy leak in on_import_key_images() (Jaquee)
20495b27 simplewallet: fix possible privacy leak in import_key_images() (Jaquee)
2017-08-15 20:53:58 +02:00
Riccardo Spagni
68ccc10b29
Merge pull request #2205
c97d1bd3 wallet: return unlock_time in get_transfers (moneromooo-monero)
2017-08-15 20:44:44 +02:00
moneromooo-monero
8655ba04ba
wallet_rpc_server: adjust small ring sizes to 5 for v6 2017-08-12 12:59:06 +01:00
Jaquee
359517c7f5 wallet_rpc_server: fix possible privacy leak in on_import_key_images() 2017-08-11 11:18:21 +02:00
moneromooo-monero
61770ec2da
change mixin to ring size in user visible places 2017-08-07 21:12:27 +01:00
Riccardo Spagni
f5be5b7e7b
Merge pull request #2210
cb0b5594 Move OpenAlias console input back from libs (moneromooo-monero)
2017-08-07 15:09:45 +02:00
moneromooo-monero
c97d1bd3d4
wallet: return unlock_time in get_transfers
also show it in simplewallet's show_transfer
2017-08-02 10:15:27 +01:00
moneromooo-monero
cb0b559451
Move OpenAlias console input back from libs
Library code should definitely not ask for console input unless
it's clearly an input function. Delegating the user interaction
part to the caller means it can now be used by a GUI, or have a
decision algorithm better adapted to a particular caller.
2017-07-27 11:30:13 +01:00
moneromooo-monero
dc0b312f8a
wallet_rpc_server: optionally return tx blobs on transfer calls
also add do_not_relay flag to them, so it now becomes possible
to create a tx without sending it yet
2017-07-26 10:33:04 +01:00