If more than one thread wants to make sure of the spend secret key,
then we decrypt on the first caller and reencrypt on the last caller,
otherwise we could use an invalid secret key.
If the hashes received would move the current blockchain past the
stop point, the short history would not be updated, since we do
not expect another loop, but the daemon might return earlier hashes,
causing the end index to not be enough to reach the threshold and
this require another loop, which will download the same hashes and
cause an infinite loop.
Target height would be appropriate for the daemon, which syncs
off other daemons, but the wallet syncs off the daemon it's
connected to, and its target is the daemon's current height.
We get new pool txes before processing any tx, pool or not.
This ensures that if we're asked for a password, this does not
cause a measurable delay in the txpool query after the last
block query.
The "everything refreshed" state was detected when a refresh call did
not return any new blocks. This can be detected without that extra
"empty" call by comparing the claimed node height to the height of
the last block retrieved. Doing this avoids that last call, saves
some bandwidth, and makes the common refresh case use only one call
rather than two.
As a side effect, it prevents an information leak reported by
Tramèr et al: if the wallet retrieves a set of blocks which includes
an output sent to the refreshing wallet, the wallet will prompt the
user for the password to decode the amount and calculate the key
image for the new output, and this will delay subsequent calls to
getblocks.bin, allowing a passive adversary to note the delay and
deduce when the wallet receives at least one output.
This can still happen if the wallet downloads more than 1000 blocks,
since this will be split in several calls, but then the most the
adversary can tell is which 1000 block section the user received
some monero (the adversary can estimate the heights of the blocks
by calculating how many "large" transfers are done, which will be
sections of blocks, the last of which will usually be below 1000,
but the size of the data should allow the actual number of blocks
sent to be determined fairly accurately).
This timing trick still be used via the subsequent scan for incoming
txes in the txpool, which will be fixed later.
This lets a passive attacker with access to the network link
between node and wallet perform traffic analysis to deduce
when an idle wallet receives a transaction.
Reported by Tramèr et al.
Daemons intended for public use can be set up to require payment
in the form of hashes in exchange for RPC service. This enables
public daemons to receive payment for their work over a large
number of calls. This system behaves similarly to a pool, so
payment takes the form of valid blocks every so often, yielding
a large one off payment, rather than constant micropayments.
This system can also be used by third parties as a "paywall"
layer, where users of a service can pay for use by mining Monero
to the service provider's address. An example of this for web
site access is Primo, a Monero mining based website "paywall":
https://github.com/selene-kovri/primo
This has some advantages:
- incentive to run a node providing RPC services, thereby promoting the availability of third party nodes for those who can't run their own
- incentive to run your own node instead of using a third party's, thereby promoting decentralization
- decentralized: payment is done between a client and server, with no third party needed
- private: since the system is "pay as you go", you don't need to identify yourself to claim a long lived balance
- no payment occurs on the blockchain, so there is no extra transactional load
- one may mine with a beefy server, and use those credits from a phone, by reusing the client ID (at the cost of some privacy)
- no barrier to entry: anyone may run a RPC node, and your expected revenue depends on how much work you do
- Sybil resistant: if you run 1000 idle RPC nodes, you don't magically get more revenue
- no large credit balance maintained on servers, so they have no incentive to exit scam
- you can use any/many node(s), since there's little cost in switching servers
- market based prices: competition between servers to lower costs
- incentive for a distributed third party node system: if some public nodes are overused/slow, traffic can move to others
- increases network security
- helps counteract mining pools' share of the network hash rate
- zero incentive for a payer to "double spend" since a reorg does not give any money back to the miner
And some disadvantages:
- low power clients will have difficulty mining (but one can optionally mine in advance and/or with a faster machine)
- payment is "random", so a server might go a long time without a block before getting one
- a public node's overall expected payment may be small
Public nodes are expected to compete to find a suitable level for
cost of service.
The daemon can be set up this way to require payment for RPC services:
monerod --rpc-payment-address 4xxxxxx \
--rpc-payment-credits 250 --rpc-payment-difficulty 1000
These values are an example only.
The --rpc-payment-difficulty switch selects how hard each "share" should
be, similar to a mining pool. The higher the difficulty, the fewer
shares a client will find.
The --rpc-payment-credits switch selects how many credits are awarded
for each share a client finds.
Considering both options, clients will be awarded credits/difficulty
credits for every hash they calculate. For example, in the command line
above, 0.25 credits per hash. A client mining at 100 H/s will therefore
get an average of 25 credits per second.
For reference, in the current implementation, a credit is enough to
sync 20 blocks, so a 100 H/s client that's just starting to use Monero
and uses this daemon will be able to sync 500 blocks per second.
The wallet can be set to automatically mine if connected to a daemon
which requires payment for RPC usage. It will try to keep a balance
of 50000 credits, stopping mining when it's at this level, and starting
again as credits are spent. With the example above, a new client will
mine this much credits in about half an hour, and this target is enough
to sync 500000 blocks (currently about a third of the monero blockchain).
There are three new settings in the wallet:
- credits-target: this is the amount of credits a wallet will try to
reach before stopping mining. The default of 0 means 50000 credits.
- auto-mine-for-rpc-payment-threshold: this controls the minimum
credit rate which the wallet considers worth mining for. If the
daemon credits less than this ratio, the wallet will consider mining
to be not worth it. In the example above, the rate is 0.25
- persistent-rpc-client-id: if set, this allows the wallet to reuse
a client id across runs. This means a public node can tell a wallet
that's connecting is the same as one that connected previously, but
allows a wallet to keep their credit balance from one run to the
other. Since the wallet only mines to keep a small credit balance,
this is not normally worth doing. However, someone may want to mine
on a fast server, and use that credit balance on a low power device
such as a phone. If left unset, a new client ID is generated at
each wallet start, for privacy reasons.
To mine and use a credit balance on two different devices, you can
use the --rpc-client-secret-key switch. A wallet's client secret key
can be found using the new rpc_payments command in the wallet.
Note: anyone knowing your RPC client secret key is able to use your
credit balance.
The wallet has a few new commands too:
- start_mining_for_rpc: start mining to acquire more credits,
regardless of the auto mining settings
- stop_mining_for_rpc: stop mining to acquire more credits
- rpc_payments: display information about current credits with
the currently selected daemon
The node has an extra command:
- rpc_payments: display information about clients and their
balances
The node will forget about any balance for clients which have
been inactive for 6 months. Balances carry over on node restart.
If the peer (whether pruned or not itself) supports sending pruned blocks
to syncing nodes, the pruned version will be sent along with the hash
of the pruned data and the block weight. The original tx hashes can be
reconstructed from the pruned txes and theur prunable data hash. Those
hashes and the block weights are hashes and checked against the set of
precompiled hashes, ensuring the data we received is the original data.
It is currently not possible to use this system when not using the set
of precompiled hashes, since block weights can not otherwise be checked
for validity.
This is off by default for now, and is enabled by --sync-pruned-blocks
2cd4fd8 Changed the use of boost:value_initialized for C++ list initializer (JesusRami)
4ad191f Removed unused boost/value_init header (whyamiroot)
928f4be Make null hash constants constexpr (whyamiroot)
One considers the blockchain, while the other considers the
blockchain and some recent actions, such as a recently created
transaction which spend some outputs, but isn't yet mined.
Typically, the "balance" command wants the latter, to reflect
the recent action, but things like proving ownership wants
the former.
This fixes a crash in get_reserve_proof, where a preliminary
check and the main code used two concepts of "balance".
New CLI wallet variable: export-format with options "binary" (the default),
or "ascii". "Binary" behaves as before, "ascii" forces the wallet to convert
data to ASCII using base64.
Reading files from the disk tries to auto detect what format has been
used (using a magic string added when exporting the data).
Implements https://github.com/monero-project/monero/issues/2859
According to [1], std::random_shuffle is deprecated in C++14 and removed
in C++17. Since std::shuffle is available since C++11 as a replacement
and monero already requires C++11, this is a good replacement.
A cryptographically secure random number generator is used in all cases
to prevent people from perhaps copying an insecure std::shuffle call
over to a place where a secure one would be warranted. A form of
defense-in-depth.
[1]: https://en.cppreference.com/w/cpp/algorithm/random_shuffle
- Trezor: support for device address display (subaddress, integrated address)
- Wallet::API support added
- Simplewallet:
- address device [<index>]
- address new <label> // shows address on device also
- integrated_address [device] <payment_id|address> // new optional "device" arg to display also on the device
9bfa4c20 Fix allow any cert mode in wallet rpc when configured over rpc (Lee Clagett)
3544596f Add ssl_options support to monerod's rpc mode. (Lee Clagett)
c9aaccf3 Fix configuration bug; wallet2 --daemon-ssl-allow-any-cert now works. (Lee Clagett)
If we have fewer outputs available on the chain than what we
require, but the output we're spending already has a ring,
it would loop picking outputs randomly, but never find enough.
Also tune logs for better debugging this kind of thing.
In the case where previously a second unneeded output would be
added to a transaction. This should help *some* of the cases
where outputs are slowly being consolidated, leading to the
whole balance being locked when sending monero.
c12b43cb wallet: add number of blocks required for the balance to fully unlock (moneromooo-monero)
3f1e9e84 wallet2: set confirmations to 0 for pool txes in proofs (moneromooo-monero)
36c037ec wallet_rpc_server: error out on getting the spend key from a hot wallet (moneromooo-monero)
cd1eaff2 wallet_rpc_server: always fill out subaddr_indices in get_transfers (moneromooo-monero)
An override for the wallet to daemon connection is provided, but not for
other SSL contexts. The intent is to prevent users from supplying a
system CA as the "user" whitelisted certificate, which is less secure
since the key is controlled by a third party.
Currently if a user specifies a ca file or fingerprint to verify peer,
the default behavior is SSL autodetect which allows for mitm downgrade
attacks. It should be investigated whether a manual override should be
allowed - the configuration is likely always invalid.
Specifying SSL certificates for peer verification does an exact match,
making it a not-so-obvious alias for the fingerprints option. This
changes the checks to OpenSSL which loads concatenated certificate(s)
from a single file and does a certificate-authority (chain of trust)
check instead. There is no drop in security - a compromised exact match
fingerprint has the same worse case failure. There is increased security
in allowing separate long-term CA key and short-term SSL server keys.
This also removes loading of the system-default CA files if a custom
CA file or certificate fingerprint is specified.
The setup-background-mining option can be used to select
background mining when a wallet loads. The user will be asked
the first time the wallet is created.
f825055d wallet_rpc_server: error out on getting the spend key from a hot wallet (moneromooo-monero)
67aa4adc wallet_rpc_server: add a set_daemon RPC (moneromooo-monero)
705acbac wallet2: init some variables to default values if loading old wallets (moneromooo-monero)
f82bc29e wallet_rpc_server: always fill out subaddr_indices in get_transfers (moneromooo-monero)
01efdc6a wallet_rpc_server: set confirmations to 0 for pending/pool txes (moneromooo-monero)
7c440915 Add get_tx_proof support, needed for new sanity check (cslashm)
98fdcb2a Add support for V11 protocol with BulletProofV2 and short amount. New scheme key destination contrfol Fix dummy decryption in debug mode (cslashm)
3a981a33 Add application version compatibility check. (cslashm)
These commands let one freeze outputs by key image, so they
do not appear in balance, nor are considered when creating
a transaction, etc
This is helpful when receiving an output from a suspected spy,
who might try to track your other outputs by seeing with what
other outputs it gets spent.
The frozen command may be used without parameters to list all
currently frozen outputs.
- import only key images generated by cold signing process
- wallet_api: trezor methods added
- wallet: button request code added
- const added to methods
- wallet2::get_tx_key_device() tries to decrypt stored tx private keys using the device.
- simplewallet supports get_tx_key and get_tx_proof on hw device using the get_tx_key feature
- live refresh enables refresh with trezor i.e. computing key images on the fly. More convenient and efficient for users.
- device: has_ki_live_refresh added
- a thread is watching whether live refresh is being computed, if not for 30 seconds, it terminates the live refresh process - switches Trezor state
- enables to perform rescan_spent / ki sync with untrusted daemon. Spent check status involves RPC calls which require trusted daemon status as it leaks information. The new call performs soft reset while preserving key images thus a sequence: refresh, ki sync / import, rescan_bc keep_ki will correctly perform spent checking without need for trusted daemon.
- useful to detect spent outputs with untrusted daemon on watch_only / multisig / hw-cold wallets after expensive key image sync.
- cli: rescan_bc keep_ki
It's better to just ignore them, the user does not really need
to know they're here. If the mask is wrong, they'll fail to be
used, and sweeping will fail as it tries to use it.
Reported by Josh Davis.
- return the right output data when offset is not zero
- do not consider import failed if result height is zero
(it can be 0 if unknown)
- select the right tx pubkey when using subaddresses (it's faster,
and we might select the wrong one if we got an output using one
of the additional tx keys)
- account for skipped outputs for spent/unspent balance info
"spent" is arguably wrong, since it will count spent change
multiple times as it goes through receive/spend cycles.
RPC connections now have optional tranparent SSL.
An optional private key and certificate file can be passed,
using the --{rpc,daemon}-ssl-private-key and
--{rpc,daemon}-ssl-certificate options. Those have as
argument a path to a PEM format private private key and
certificate, respectively.
If not given, a temporary self signed certificate will be used.
SSL can be enabled or disabled using --{rpc}-ssl, which
accepts autodetect (default), disabled or enabled.
Access can be restricted to particular certificates using the
--rpc-ssl-allowed-certificates, which takes a list of
paths to PEM encoded certificates. This can allow a wallet to
connect to only the daemon they think they're connected to,
by forcing SSL and listing the paths to the known good
certificates.
To generate long term certificates:
openssl genrsa -out /tmp/KEY 4096
openssl req -new -key /tmp/KEY -out /tmp/REQ
openssl x509 -req -days 999999 -sha256 -in /tmp/REQ -signkey /tmp/KEY -out /tmp/CERT
/tmp/KEY is the private key, and /tmp/CERT is the certificate,
both in PEM format. /tmp/REQ can be removed. Adjust the last
command to set expiration date, etc, as needed. It doesn't
make a whole lot of sense for monero anyway, since most servers
will run with one time temporary self signed certificates anyway.
SSL support is transparent, so all communication is done on the
existing ports, with SSL autodetection. This means you can start
using an SSL daemon now, but you should not enforce SSL yet or
nothing will talk to you.
RPC connections now have optional tranparent SSL.
An optional private key and certificate file can be passed,
using the --{rpc,daemon}-ssl-private-key and
--{rpc,daemon}-ssl-certificate options. Those have as
argument a path to a PEM format private private key and
certificate, respectively.
If not given, a temporary self signed certificate will be used.
SSL can be enabled or disabled using --{rpc}-ssl, which
accepts autodetect (default), disabled or enabled.
Access can be restricted to particular certificates using the
--rpc-ssl-allowed-certificates, which takes a list of
paths to PEM encoded certificates. This can allow a wallet to
connect to only the daemon they think they're connected to,
by forcing SSL and listing the paths to the known good
certificates.
To generate long term certificates:
openssl genrsa -out /tmp/KEY 4096
openssl req -new -key /tmp/KEY -out /tmp/REQ
openssl x509 -req -days 999999 -sha256 -in /tmp/REQ -signkey /tmp/KEY -out /tmp/CERT
/tmp/KEY is the private key, and /tmp/CERT is the certificate,
both in PEM format. /tmp/REQ can be removed. Adjust the last
command to set expiration date, etc, as needed. It doesn't
make a whole lot of sense for monero anyway, since most servers
will run with one time temporary self signed certificates anyway.
SSL support is transparent, so all communication is done on the
existing ports, with SSL autodetection. This means you can start
using an SSL daemon now, but you should not enforce SSL yet or
nothing will talk to you.
23813c71 blockchain: add --reorg-notify (moneromooo-monero)
f6db59b0 notify: handle arbitrary tags (moneromooo-monero)
ff959216 notify: warn if the spec contains one of '"\ (moneromooo-monero)
13852678 common: set MONERO_DEFAULT_LOG_CATEGORY for notify and spawn (moneromooo-monero)
b6534c40 ringct: remove unused senderPk from ecdhTuple (moneromooo-monero)
7d375981 ringct: the commitment mask is now deterministic (moneromooo-monero)
99d946e6 ringct: encode 8 byte amount, saving 24 bytes per output (moneromooo-monero)
cdc3ccec ringct: save 3 bytes on bulletproof size (moneromooo-monero)
f931e16c add a bulletproof version, new bulletproof type, and rct config (moneromooo-monero)
The blockchain prunes seven eighths of prunable tx data.
This saves about two thirds of the blockchain size, while
keeping the node useful as a sync source for an eighth
of the blockchain.
No other data is currently pruned.
There are three ways to prune a blockchain:
- run monerod with --prune-blockchain
- run "prune_blockchain" in the monerod console
- run the monero-blockchain-prune utility
The first two will prune in place. Due to how LMDB works, this
will not reduce the blockchain size on disk. Instead, it will
mark parts of the file as free, so that future data will use
that free space, causing the file to not grow until free space
grows scarce.
The third way will create a second database, a pruned copy of
the original one. Since this is a new file, this one will be
smaller than the original one.
Once the database is pruned, it will stay pruned as it syncs.
That is, there is no need to use --prune-blockchain again, etc.
Half of the patch was correct, but half was introducing another bug,
where a wallet asking for a fork that the daemon does not know about
yet would decide to use those rules.
This avoids the constant message about needed to run refresh
to enter a password.
Also mention the txpool when asking for the password if the
reason is a pool tx.
When doing a first refresh on HW-token based wallet KI sync is required if money were received. Received money may indicate wallet was already used before the restore I.e., some transaction could have been already sent from the wallet. The spent UTXO would not be detected as spent which could lead to double spending errors on submitting a new transaction.
Thus if the wallet is HW-token based with the cold signing protocol and the first refresh detected received money the user is asked to perform the key image sync.
- adds a new option `--hw-device-deriv-path` to the simple wallet. Enables to specify wallet derivation path / wallet code (path avoided so it can be misinterpreted as a file path).
- devices can use different derivation mechanisms. Trezor uses standard SLIP-10 mechanism with fixed SLIP-44 prefix for Monero
- Trezor: when empty, the default derivation mechanism is used with 44'/128'/0'. When entered the derivation path is 44'/128'/PATH.
- Trezor: the path is always taken as elements are hardened (1<<31 bit turned on)
aee7a4e3 wallet_rpc_server: do not use RPC data if the call failed (moneromooo-monero)
1a0733e5 windows_service: fix memory leak (moneromooo-monero)
0dac3c64 unit_tests: do not rethrow a copy of an exception (moneromooo-monero)
5d9915ab cryptonote: fix get_unit for non default settings (moneromooo-monero)
d4f50cb1 remove some unused code (moneromooo-monero)
61163971 a few minor (but easy) performance tweaks (moneromooo-monero)
30023074 tests: slow_memmem now returns size_t (moneromooo-monero)
- simple device callback object added. Device can request passphrase/PIN entry via the callback or notify user some action is required
- callback is routed to wallet2, which routes the callback to i_wallet_callback so CLI or GUI wallets can support passphrase entry for HW tokens
- wallet: device open needs wallet callback first - passphrase protected device needs wallet callback so user can enter passphrase
Motivated by https://monero.stackexchange.com/questions/10483
Some exchanges appear to have customized the wallet software
in an inappropriate way, making the tx extra field partially
unreadable. PR #3716 changed the wallet behavior disallowing
such partially valid tx extra.
An example tx reported by the user is
e87c675a85f34ecac58a8846613d25062f1813e1023c552b705afad32b972c38
where the normal tx pubkey appears again with the aditional
tx pubkeys tag `04` which is inappropriate.
moneromooo-monero
luigi1111
xiphon
selsta
stoffu
anonimal
Lev Sizov
Jesus Ramirez
Tadeas Moravec
Tom Smeding
Dusan Klinec
Howard Chu
Riccardo Spagni
Lee Clagett
cslashm
binaryFate
spoke0
Martijn Otto
Doyle
naughtyfox
rbrunner7