Commit graph

1019 commits

Author SHA1 Message Date
moneromooo-monero
265290388b
wallet: guard against partly initialized multisig wallet 2017-12-17 16:12:18 +00:00
moneromooo-monero
66e34e85b1
add multisig core test and factor multisig building blocks 2017-12-17 16:12:15 +00:00
moneromooo-monero
f4eda44ce3
N-1/N multisig 2017-12-17 16:12:12 +00:00
moneromooo-monero
cd64c7990c
multisig address generation RPC 2017-12-17 16:12:09 +00:00
moneromooo-monero
fff871a455
gen_multisig: generates multisig wallets if participants trust each other 2017-12-17 16:12:06 +00:00
moneromooo-monero
95a21a793d
wallet2: allow empty wallet filename to avoid saving data
Useful to speed tests up and avoid unnecessary leftover files
2017-12-17 16:12:03 +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
6d219a9250
wallet: add multisig key generation
Scheme by luigi1111
2017-12-17 16:11:53 +00:00
Riccardo Spagni
a3a8343051
Merge pull request #2857
7193b89f Scrub keys from memory just before scope end. (moneromooo-monero)
2017-12-17 13:00:11 +02:00
Riccardo Spagni
066fd7aced
Merge pull request #2877
43f5269f Wallets now do not depend on the daemon rpc lib (moneromooo-monero)
bb89ae8b move connection_basic and network_throttle from src/p2p to epee (moneromooo-monero)
4abf25f3 cryptonote_core does not depend on p2p anymore (moneromooo-monero)
2017-12-17 12:59:44 +02:00
moneromooo-monero
43f5269f84
Wallets now do not depend on the daemon rpc lib
The shared RPC code is now moved off into a separate lib
2017-12-16 23:28:59 +00:00
moneromooo-monero
09ce03d612
move includes around to lessen overall load 2017-12-16 22:46:38 +00:00
moneromooo-monero
7193b89fe5 Scrub keys from memory just before scope end.
Partially implements #74.

Securely erases keys from memory after they are no longer needed. Might have a
performance impact, which I haven't measured (perf measurements aren't
generally reliable on laptops).

Thanks to @stoffu for the suggestion to specialize the pod_to_hex/hex_to_pod
functions. Using overloads + SFINAE instead generalizes it so other types can
be marked as scrubbed without adding more boilerplate.
2017-12-16 15:40:33 -07:00
Riccardo Spagni
87158dca68
Merge pull request #2885
a1e3670b catch wallet decrypt false positive (Riccardo Spagni)
2017-12-16 23:24:16 +02:00
Riccardo Spagni
6c0953b15a
Merge pull request #2860
3dffe71b new wipeable_string class to replace std::string passphrases (moneromooo-monero)
7a2a5741 utils: initialize easylogging++ in on_startup (moneromooo-monero)
54950829 use memwipe in a few relevant places (moneromooo-monero)
000666ff add a memwipe function (moneromooo-monero)
2017-12-16 23:19:27 +02:00
moneromooo-monero
c83d0b3ee2
add bulletproofs from v7 on testnet 2017-12-08 13:50:45 +00:00
moneromooo-monero
d58835b2f6
integrate bulletproofs into monero 2017-12-08 13:48:15 +00:00
Riccardo Spagni
a1e3670b33
catch wallet decrypt false positive 2017-12-04 11:07:32 +02:00
Riccardo Spagni
81fb832082
Merge pull request #2833
b0426d4c Fixes #759 Add sanity check on restore height (Cifrado)
2017-12-02 09:25:53 +02:00
Riccardo Spagni
301279709d
Merge pull request #2850
d875a9ff wallet2: detect multiple outputs from a tx to different subaddresses (moneromooo-monero)
2017-12-02 09:24:25 +02:00
Riccardo Spagni
0bf4d6deea
Merge pull request #2828
6cbe7bcd wallet2: check generate_key_derivation return value (moneromooo-monero)
2017-12-02 09:21:55 +02:00
moneromooo-monero
3dffe71b72
new wipeable_string class to replace std::string passphrases 2017-11-27 22:25:57 +00:00
Riccardo Spagni
2e54e7ff0b
Merge pull request #2824
51895fd7 split wallet and wallet_api (moneromooo-monero)
2017-11-25 19:53:35 +02:00
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
fbfdaae06f
Merge pull request #2807
61712384 daemon & simplewallet: don't set max-concurrency when unspecified (stoffu)
2017-11-25 19:51:52 +02:00
Riccardo Spagni
82375f7de7
Merge pull request #2806
da706b61 Fix false GCC warning '‘*((void*)& subaddr_account +4)’ may be used unitialized' (binaryFate)
2017-11-25 19:51:28 +02:00
Riccardo Spagni
df032aac69
Merge pull request #2800
0b726be7 wallet2: minimize the number of construct_tx calls (moneromooo-monero)
9d505d26 wallet2: cleanup some debug logs (moneromooo-monero)
2017-11-25 19:50:58 +02:00
Riccardo Spagni
1de386111f
Merge pull request #2797
7e387fb1 wallet2: only add a dummy 0 output if there's one output otherwise (moneromooo-monero)
2017-11-25 19:50:21 +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
moneromooo-monero
d875a9ff90
wallet2: detect multiple outputs from a tx to different subaddresses 2017-11-21 23:22:15 +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
Cifrado
b0426d4cf2 Fixes #759 Add sanity check on restore height 2017-11-17 08:35:59 +01:00
moneromooo-monero
51895fd7df
split wallet and wallet_api
This speeds up building a lot when wallet2.h (or something it
includes) changes, since all the API includes wallet2.h
2017-11-16 12:10:29 +00:00
moneromooo-monero
6cbe7bcdd2
wallet2: check generate_key_derivation return value 2017-11-16 10:31:47 +00:00
stoffu
6171238416
daemon & simplewallet: don't set max-concurrency when unspecified 2017-11-16 08:03:25 +09:00
Tim L
ef941855ae Wallet RPC: Add prompt-for-password flag 2017-11-15 13:21:55 -05:00
moneromooo-monero
0b726be703
wallet2: minimize the number of construct_tx calls 2017-11-15 18:01:35 +00:00
moneromooo-monero
9d505d26b8
wallet2: cleanup some debug logs 2017-11-15 18:01:32 +00:00
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
Riccardo Spagni
3abd6f1fd0
Merge pull request #2773
ffe5b857 Correct totals computation (Michał Sałaban)
2017-11-15 11:24:08 +02:00
Riccardo Spagni
c9a410e394
Merge pull request #2772
5d92c7cc wallet2: typo fix in error message (moneromooo-monero)
2017-11-15 11:23:22 +02:00
Riccardo Spagni
0d4d628805
Merge pull request #2634
b738f4b5 wallet: add sweep_single command (stoffu)
2017-11-15 11:17:01 +02:00
Riccardo Spagni
39bc39b86e
Merge pull request #2628
7cb303a4 wallet2: simplify incoming tx processing code (moneromooo-monero)
2017-11-15 11:14:58 +02:00