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Wladimir J. van der Laan 9abed46871
Merge #16946: wallet: include a checksum of encrypted private keys 
d67055e00d Upgrade or rewrite encrypted key checksums (Andrew Chow)
c9a9ddb414 Set fDecryptionThoroughlyChecked based on whether crypted key checksums are valid (Andrew Chow)
a8334f7ac3 Read and write a checksum for encrypted keys (Andrew Chow)

Pull request description:

  Adds a checksum to the encrypted key record in the wallet database so that encrypted keys can be checked for corruption on wallet loading, in the same way that unencrypted keys are. This allows for us to skip the full decryption of keys upon the first unlocking of the wallet in that session as any key corruption will have already been detected. The checksum is just the double SHA256 of the encrypted key and it is appended to the record after the encrypted key itself.

  This is backwards compatible as old wallets will be able to read the encrypted key and ignore that there is more data in the stream. Additionally, old wallets will be upgraded upon their first unlocking (so that key decryption is checked before we commit to a checksum of the encrypted key) and a wallet flag set indicating that. The presence of the wallet flag lets us skip the full decryption as if `fDecryptionThoroughlyChecked` were true.

  This does mean that the first time an old wallet is unlocked in a new version will take much longer, but subsequent unlocks will be instantaneous. Furthermore, corruption will be detected upon loading rather than on trying to send so wallet corruption will be detected sooner.

  Fixes #12423

ACKs for top commit:
  laanwj:
    code review ACK d67055e00d
  jonatack:
    Code review ACK d67055e00d
  meshcollider:
    Code review ACK d67055e00d

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.github Remove GitHub Actions CI workflow. 2020-01-30 18:45:28 +00:00
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build-aux/m4 Update ax_cxx_compile_stdcxx.m4 2020-04-11 02:15:20 -07:00
build_msvc build: remove fdelt_chk backwards compatibility code 2020-05-07 15:44:56 +08:00
ci Merge #18677: Multiprocess build support 2020-05-21 15:34:25 +08:00
contrib Merge #18958: guix: Make V=1 more powerful for debugging 2020-05-21 15:09:48 +08:00
depends depends: add MULTIPROCESS depends option 2020-05-12 09:47:06 -04:00
doc build: multiprocess autotools changes 2020-05-12 09:47:06 -04:00
share Merge #18616: refactor: Cleanup clientversion.cpp 2020-05-13 20:14:51 +02:00
src Merge #16946: wallet: include a checksum of encrypted private keys 2020-05-21 20:50:25 +02:00
test Merge #19023: test: Fix intermittent ETIMEDOUT on FreeBSD 2020-05-21 17:27:27 +02:00
.appveyor.yml Merge #18640: appveyor: Remove clcache 2020-04-15 16:19:52 -04:00
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.fuzzbuzz.yml ci: Add fuzzbuzz integration 2020-04-14 16:38:26 +00:00
.gitattributes Separate protocol versioning from clientversion 2014-10-29 00:24:40 -04:00
.gitignore build: multiprocess autotools changes 2020-05-12 09:47:06 -04:00
.python-version .python-version: Specify full version 3.5.6 2019-03-02 12:06:26 -05:00
.style.yapf test: .style.yapf: Set column_limit=160 2019-03-04 18:28:13 -05:00
.travis.yml Merge #18677: Multiprocess build support 2020-05-21 15:34:25 +08:00
autogen.sh scripted-diff: Bump copyright of files changed in 2019 2019-12-30 10:42:20 +13:00
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CONTRIBUTING.md Merge #18283: doc: Explain rebase policy in CONTRIBUTING.md 2020-03-11 16:01:25 +01:00
COPYING doc: Update license year range to 2020 2019-12-26 23:11:21 +01:00
INSTALL.md Update INSTALL landing redirection notice for build instructions. 2016-10-06 12:27:23 +13:00
libbitcoinconsensus.pc.in build: remove libcrypto as internal dependency in libbitcoinconsensus.pc 2019-11-19 15:03:44 +01:00
Makefile.am build: Accomodate makensis v2.x 2020-05-01 14:27:57 -04:00
README.md Adding build instructions to Bitcoin Core, fixes #18658 2020-04-16 21:01:00 -07:00
SECURITY.md doc: Remove explicit mention of version from SECURITY.md 2019-06-14 06:39:17 -04:00

README.md

Bitcoin Core integration/staging tree

https://bitcoincore.org

What is Bitcoin?

Bitcoin is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin Core is the name of open source software which enables the use of this currency.

For more information, as well as an immediately usable, binary version of the Bitcoin Core software, see https://bitcoincore.org/en/download/, or read the original whitepaper.

License

Bitcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

Development Process

The master branch is regularly built (see doc/build-*.md for instructions) and tested, but is not guaranteed to be completely stable. Tags are created regularly to indicate new official, stable release versions of Bitcoin Core.

The contribution workflow is described in CONTRIBUTING.md and useful hints for developers can be found in doc/developer-notes.md.

Testing

Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code. Unit tests can be compiled and run (assuming they weren't disabled in configure) with: make check. Further details on running and extending unit tests can be found in /src/test/README.md.

There are also regression and integration tests, written in Python, that are run automatically on the build server. These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py

The Travis CI system makes sure that every pull request is built for Windows, Linux, and macOS, and that unit/sanity tests are run automatically.

Manual Quality Assurance (QA) Testing

Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.

Translations

Changes to translations as well as new translations can be submitted to Bitcoin Core's Transifex page.

Translations are periodically pulled from Transifex and merged into the git repository. See the translation process for details on how this works.

Important: We do not accept translation changes as GitHub pull requests because the next pull from Transifex would automatically overwrite them again.

Translators should also subscribe to the mailing list.