In this commit, we remove many of the methods in the Manager struct as
they’ve now be been replicated within a scoped format for each of the
ScopedKeyManagers.
A major change is that we’ll now actually store the master HD private
and public keys. This required as in order to create new scopes, we
need access to the master HD private key as hardened derivation is
required in accordance with BIP43.
The initial creation of the manager namespaces has also been extended
to create the namespaces and keys for the set of default key scopes.
Finally, a series of utility method has been added to allow callers to
create ScopedKeyManagers for arbitrary sets of scopes.
This changes the database access APIs and each of the "manager"
packages (waddrmgr/wstakemgr) so that transactions are opened (only)
by the wallet package and the namespace buckets that each manager
expects to operate on are passed in as parameters.
This helps improve the atomicity situation as it means that many
calls to these APIs can be grouped together into a single
database transaction.
This change does not attempt to completely fix the "half-processed"
block problem. Mined transactions are still added to the wallet
database under their own database transaction as this is how they are
notified by the consensus JSON-RPC server (as loose transactions,
without the rest of the block that contains them). It will make
updating to a fixed notification model significantly easier, as the
same "manager" APIs can still be used, but grouped into a single
atomic transaction.
This commit introduces two new address types to the waddrmgr. The first
address type is the native p2wkh (pay-to-witness-key-hash) output type
introduced as part of BIP0141 and the segwit soft-fork. The second
address type is a p2wkh output nested *within* a regular p2sh output.
This second address allows older wallets which are not yet aware of the
new segwit output types to transparently pay to a wallet which does
support them. Additionally, using this nested p2wkh output the wallet
gains both the space+transaction fee savings, as well as the
malleability fixes.
Both address types have been implemented as special cases of the
ManagedPubKeyAddress since they share several traits, only
differentiating in the signing mechanism needed, and the concrete
implementation of btcutil.Address returned by the address.
Two new `addressType` constants have been added to waddrmgr’s db in
order to properly serialize and deserialize the new address types.
This updates all code to make use of the new chainhash package since the
old wire.ShaHash type and related functions have been removed in favor
of the abstracted package.
Also, while here, rename all variables that included sha in their name
to include hash instead.
Finally, update glide.lock to use the required version of btcd, btcutil,
and btcrpcclient.
This commit corrects various things found by the static checkers
(comments, unkeyed fields, return after some if/else).
Add generated files and legacy files to the whitelist to be ignored.
Catch .travis.yml up with btcd so goclean can be run.
This changes the wallet.Open function signature to remove the database
namespace parameters. This is done so that the wallet package itself
is responsible for the location and opening of these namespaces from
the database, rather than requiring the caller to open these ahead of
time.
A new wallet.Create function has also been added. This function
initializes a new wallet in an empty database, using the same
namespaces as wallet.Open will eventually use. This relieves the
caller from needing to manage wallet database namespaces explicitly.
Fixes#397.
This change only prevents creating new accounts with the empty name or
renaming an existing account to one. Any accounts in the DB that are
already named the empty string are left untouched (and should be
renamed to something meaningful by the user).
Fixes#369.
This is a rather monolithic commit that moves the old RPC server to
its own package (rpc/legacyrpc), introduces a new RPC server using
gRPC (rpc/rpcserver), and provides the ability to defer wallet loading
until request at a later time by an RPC (--noinitialload).
The legacy RPC server remains the default for now while the new gRPC
server is not enabled by default. Enabling the new server requires
setting a listen address (--experimenalrpclisten). This experimental
flag is used to effectively feature gate the server until it is ready
to use as a default. Both RPC servers can be run at the same time,
but require binding to different listen addresses.
In theory, with the legacy RPC server now living in its own package it
should become much easier to unit test the handlers. This will be
useful for any future changes to the package, as compatibility with
Core's wallet is still desired.
Type safety has also been improved in the legacy RPC server. Multiple
handler types are now used for methods that do and do not require the
RPC client as a dependency. This can statically help prevent nil
pointer dereferences, and was very useful for catching bugs during
refactoring.
To synchronize the wallet loading process between the main package
(the default) and through the gRPC WalletLoader service (with the
--noinitialload option), as well as increasing the loose coupling of
packages, a new wallet.Loader type has been added. All creating and
loading of existing wallets is done through a single Loader instance,
and callbacks can be attached to the instance to run after the wallet
has been opened. This is how the legacy RPC server is associated with
a loaded wallet, even after the wallet is loaded by a gRPC method in a
completely unrelated package.
Documentation for the new RPC server has been added to the
rpc/documentation directory. The documentation includes a
specification for the new RPC API, addresses how to make changes to
the server implementation, and provides short example clients in
several different languages.
Some of the new RPC methods are not implementated exactly as described
by the specification. These are considered bugs with the
implementation, not the spec. Known bugs are commented as such.
The behaviour of function Address() in waddrmgr has been updated such that
it now displays the correct behaviour as described in the comments. That is,
when a public key address is given as a btcutil.Address, the key is converted
to a public key hash address so that serializing with ScriptAddress() yields
the corresponding public key hash. This allows the address manager to find
the corresponding private key, and fixes the signing of multisignature
transactions.
Rather than the main package being responsible for opening the address
and transaction managers, the namespaces of these components are
passed as parameters to the wallet.Open function.
Additionally, the address manager Options struct has been split into
two: ScryptOptions which holds the scrypt parameters needed during
passphrase key derivation, and OpenCallbacks which is only passed to
the Open function to allow the caller to provide additional details
during upgrades.
These changes are being done in preparation for a notification server
in the wallet package, with callbacks passed to the Open and Create
functions in waddrmgr and wtxmgr. Before this could happen, the
wallet package had to be responsible for actually opening the managers
from their namespaces.
Rather than disallowing the default account to be renamed as was
proposed in #245 (and implemented in #246), the default account name
is no longer considered a reserved name by the address manager.
Instead, it is simply the initial name used for the first initial
account.
A database upgrade removes any additional aliases for the default
account in the database. This prevents a lookup for some name which
is not an account name from mapping to the default account
unexpectedly (potentially preventing incorrect account usage from the
RPC server due to bad iteraction with default parameters).
All unset account names in a JSON-RPC request are expected to be set
nil by btcjson. This behavior depends on btcsuite/btcd#399.
Additionally, the manager no longer considers the wildcard * to be a
reserved account name. Due to poor API decisions, the RPC server
overloads the meaning of account fields to optionally allow referring
to all accounts at a time, or a single account. This is not a address
manager responsibility, though, as a future cleaner API should not use
multiple differet meanings for the same field across multiple
requests. Therefore, don't burden down future APIs with this quirk
and prevent incorrect wildcard usage from the RPC server.
Closes#245.
This introduce a new internal package to deal with the explicit
clearing of data (such as private keys) in byte slices, byte arrays
(32 and 64-bytes long), and multi-precision "big" integers.
Benchmarks from a xeon e3 (Xor is the zeroing funcion which Bytes
replaces):
BenchmarkXor32 30000000 52.1 ns/op
BenchmarkXor64 20000000 91.5 ns/op
BenchmarkRange32 50000000 31.8 ns/op
BenchmarkRange64 30000000 49.5 ns/op
BenchmarkBytes32 200000000 10.1 ns/op
BenchmarkBytes64 100000000 15.4 ns/op
BenchmarkBytea32 1000000000 2.24 ns/op
BenchmarkBytea64 300000000 4.46 ns/op
Removes an XXX from the votingpool package.
This commit makes the creation and updating of the address manager more
explicit so it's easier to upgrade in the future.
In particular, rather than treating the initial creation as an upgrade by
relying on creating the initial buckets on the fly on each load, the code
now explicitly provides distinct create and upgrade paths that are invoked
from the Create and Open functions, respectively.
It also adds some commented out sample code to illustrate how upgrades
should be done and a check to ensure bumping the version number without
writing upgrade code results in a new error, ErrUpgrade, being returned.
Finally, a test has been added for the new functionality.
This commit converts the wallet to use the new secure hierarchical
deterministic wallet address manager package as well as the walletdb
package.
The following is an overview of modified functionality:
- The wallet must now be created before starting the executable
- A new flag --create has been added to create the new wallet using wizard
style question and answer prompts
- Starting the process without an existing wallet will instruct now
display a message to run it with --create
- Providing the --create flag with an existing wallet will simply show an
error and return
In addition the snacl package has been modified to return the memory after
performing scrypt operations to the OS.
Previously a runtime.GC was being invoked which forced it to release the
memory as far as the garbage collector is concerned, but the memory was
not released back to the OS immediatley. This modification allows the
memory to be released immedately since it won't be needed again until the
next wallet unlock.
This is performed by saving the SHA512(salt+passphrase) of the
waddrmgr.Manager private passphrase each time the manager is unlocked.
If another call to Unlock is performed before the next Lock, the hash
is applied to the new input. If it matches, we know the passphrase is
(likely) equal, so return early and continue using the crypto keys
already in memory. If it does not match, we know for certain the
passphrase is incorrect and the manager is locked.
The slice of keys which must have their private extended keys derived
on unlock was never being removed from and all of these keys were
being rederived unnecessarily on every unlock. Fix this by re-slicing
the deriveOnUnlock slice to remove the just derived key if the
derivation was successful.
This commit converts the waddrmgr package to use the new walletdb package
semantics.
Since waddrmgr no longer controls the database, it is unable to make a
copy of the database and return it as the old ExportWatchingOnly function
required. As a result, it has been renamed to ConvertToWatchingOnly and
it now modifies the namespace provided to it. The idea is that the caller
which does control the database can now make a copy of the database, get
the waddrmgr namespace in the database copy and invoke the new function
to modify it. This also works well with other packages that might also
need to make modifications for watching-only mode.
In addition, the following changes are made:
- All places that worked with database paths now work with the
walletdb.Namespace interface
- The managerTx code is replaced to use the walletdb.Tx interface
- The code which checks if the manager already exists is updated to work
with the walletdb.Namespace interface
- The LatestDbVersion constant is now LatestMgrVersion since it no longer
controls the database
This commit adds comments about the specific crypto key types, moves the
selectCryptoKey function before the Encrypt/Decrypt functions that call it
to be more consistent with the rest of the code base, and slightly
modifies the verbiage of the comment.
The crypto key type unsed in the manager is not needed outside of the
package. Also, rather than having the newCryptoKey func return the
specific cryptoKey type, make it return the EncryptorDecryptor interface.
This will allow it to be overridden with another type that implements the
interface from the tests.
Useful to test error conditions.
Also provide a new function that wraps snacl.GenerateCryptoKey(),
defined as a variable so that it can be replaced in tests.
This commit implements a new secure, scalable, hierarchical deterministic
wallet address manager package.
The following is an overview of features:
- BIP0032 hierarchical deterministic keys
- BIP0043/BIP0044 multi-account hierarchy
- Strong focus on security:
- Fully encrypted database including public information such as
addresses as well as private information such as private keys and
scripts needed to redeem pay-to-script-hash transactions
- Hardened against memory scraping through the use of actively clearing
private material from memory when locked
- Different crypto keys used for public, private, and script data
- Ability for different passphrases for public and private data
- Scrypt-based key derivation
- NaCl-based secretbox cryptography (XSalsa20 and Poly1305)
- Multi-tier scalable key design to allow instant password changes
regardless of the number of addresses stored
- Import WIF keys
- Import pay-to-script-hash scripts for things such as multi-signature
transactions
- Ability to export a watching-only version which does not contain any
private key material
- Programmatically detectable errors, including encapsulation of errors
from packages it relies on
- Address synchronization capabilities
This commit only provides the implementation package. It does not
include integration into to the existing wallet code base or conversion of
existing addresses. That functionality will be provided by future
commits.
