b536813cefc13f5c54a28a7c2fce8c69e89d6624 build: add -fstack-clash-protection to hardening flags (fanquake)
076183b36b76a11438463883ff916f17aef9e001 build: add -fcf-protection=full to hardening options (fanquake)
Pull request description:
Beginning with Ubuntu `19.10`, it's packaged GCC now has some additional hardening options enabled by default (in addition to existing defaults like `-fstack-protector-strong` and reducing the minimum ssp buffer size). The new additions are`-fcf-protection=full` and `-fstack-clash-protection`.
> -fcf-protection=[full|branch|return|none]
> Enable code instrumentation of control-flow transfers to increase program security by checking that target addresses of control-flow transfer instructions (such as indirect function call, function return, indirect jump) are valid. This prevents diverting the flow of control to an unexpected target. This is intended to protect against such threats as Return-oriented Programming (ROP), and similarly call/jmp-oriented programming (COP/JOP).
> -fstack-clash-protection
> Generate code to prevent stack clash style attacks. When this option is enabled, the compiler will only allocate one page of stack space at a time and each page is accessed immediately after allocation. Thus, it prevents allocations from jumping over any stack guard page provided by the operating system.
If your interested you can grab `gcc-9_9.3.0-10ubuntu2.debian.tar.xz` from https://packages.ubuntu.com/focal/g++-9. The relevant changes are part of the `gcc-distro-specs` patches, along with the relevant additions to the gcc manages:
> NOTE: In Ubuntu 19.10 and later versions, -fcf-protection is enabled by default for C, C++, ObjC, ObjC++, if none of -fno-cf-protection nor -fcf-protection=* are found.
> NOTE: In Ubuntu 19.10 and later versions, -fstack-clash-protection is enabled by default for C, C++, ObjC, ObjC++, unless -fno-stack-clash-protection is found.
So, if you're C++ using GCC on Ubuntu 19.10 or later, these options will be active unless you explicitly opt out. This can be observed with a small test:
```c++
int main() { return 0; }
```
```bash
g++ --version
g++ (Ubuntu 9.3.0-10ubuntu2) 9.3.0
g++ test.cpp
objdump -dC a.out
..
0000000000001129 <main>:
1129: f3 0f 1e fa endbr64
112d: 55 push %rbp
112e: 48 89 e5 mov %rsp,%rbp
1131: b8 00 00 00 00 mov $0x0,%eax
1136: 5d pop %rbp
1137: c3 retq
1138: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1)
113f: 00
# recompile opting out of control flow protection
g++ test.cpp -fcf-protection=none
objdump -dC a.out
...
0000000000001129 <main>:
1129: 55 push %rbp
112a: 48 89 e5 mov %rsp,%rbp
112d: b8 00 00 00 00 mov $0x0,%eax
1132: 5d pop %rbp
1133: c3 retq
1134: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
113b: 00 00 00
113e: 66 90 xchg %ax,%ax
```
Note the insertion of an `endbr64` instruction when compiling and _not_ opting out. This instruction is part of the Intel Control-flow Enforcement Technology [spec](https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf), which the GCC control flow implementation is based on.
If we're still doing gitian builds for the `0.21.0` and `0.22.0` releases, we'd likely update the gitian image to Ubuntu Focal, which would mean that the GCC used for gitian builds would also be using these options by default. So we should decide whether we want to explicitly turn these options on as part of our hardening options (although not just for this reason), or, we should be opting-out.
GCC has supported both options since 8.0.0. Clang has supported `-fcf-protection` from 7.0.0 and will support `-fstack-clash-protection` in it's upcoming [11.0.0 release](https://clang.llvm.org/docs/ReleaseNotes.html#id6).
ACKs for top commit:
jamesob:
ACK b536813cefc13f5c54a28a7c2fce8c69e89d6624 ([`jamesob/ackr/18921.1.fanquake.build_add_stack_clash_an`](https://github.com/jamesob/bitcoin/tree/ackr/18921.1.fanquake.build_add_stack_clash_an))
laanwj:
Code review ACK b536813cefc13f5c54a28a7c2fce8c69e89d6624
Tree-SHA512: abc9adf23cdf1be384f5fb9aa5bfffdda86b9ecd671064298d4cda0440828b509f070f9b19c88c7ce50ead9ff32afff9f14c5e78d75f01241568fbfa077be0b7
8578c6fccd11404412d2c60f9bede311b79ca0d0 build: Fix search for brew-installed BDB 4 on OS X (Glenn Willen)
Pull request description:
~~NOTE: This PR contains one important fix that I need (to make Bitcoin Core build cleanly on my system without shenanigans), plus some related general cleanup that is not really necessary, and could be annoying. (I am prepared to defend my argument that BDB_CFLAGS is wrong here, and BDB_CPPFLAGS is right, but this could bite anybody who has gotten in the habit of -- or scripted -- setting the former.)~~
Ok, I have been convinced that I was too clever with the refactor and I have removed it. Now it's just the tiny change to fix the build on my local machine.
---
On OS X, when searching Homebrew keg-only packages for BDB 4.8, if we find it,
use BDB_CPPFLAGS and BDB_LIBS instead of CFLAGS and LIBS for the result. This
is (1) more correct, and (2) necessary in order to give this location
priority over other directories in the include search path, which may include
system include directories with other versions of BDB.
ACKs for top commit:
theuni:
ACK 8578c6fccd11404412d2c60f9bede311b79ca0d0.
Tree-SHA512: a28f48fc81a25736f7e77c663f21cd9a6ae1cd115682031c5aa695c94cb5afa11920330a60cd6a54832822a2aec1eb23123ac2e2dcd4f0b3835aef9c9339ac97
eacedfb0230978748cbcfb13817fed7e7c756ba7 scripts: add additional type annotations to security-check.py (fanquake)
83d063e9541cc9ea41ea86919eb9435c73efb14e scripts: add run_command to security-check.py (fanquake)
13f606b4f940e5820ff21ea62fc27a5a91774b05 scripts: remove NONFATAL from security-check.py (fanquake)
061acf62a15ad3dbb9f055b7c2569b9832ed623a scripts: no-longer check for 32 bit windows in security-check.py (fanquake)
Pull request description:
* Remove 32-bit Windows checks.
* Remove NONFATAL checking. Added in #8249, however unused since #13764.
* Add `run_command` to de-duplicate all of the subprocess calls. Mentioned in #18713.
* Add additional type annotations.
* Print stderr when there is an issue running a command.
ACKs for top commit:
laanwj:
ACK eacedfb0230978748cbcfb13817fed7e7c756ba7
Tree-SHA512: 69a7ccfdf346ee202b3e8f940634c5daed1d2b5a5d15ac9800252866ba3284ec66e391a66a0b341f5a4e5e8482fe1b614d4671e8e766112ff059405081184a85
3e38023af724a76972d39cbccfb0bba4c54a0323 scripts: add PE .reloc section check to security-check.py (fanquake)
Pull request description:
The `ld` in binutils has historically had a few issues with PE binaries, there's a good summary in this [thread](https://sourceware.org/bugzilla/show_bug.cgi?id=19011).
One issue in particular was `ld` stripping the `.reloc` section out of PE binaries, even though it's required for functioning ASLR. This was [reported by a Tor developer in 2014](https://sourceware.org/bugzilla/show_bug.cgi?id=17321) and they have been patching their [own binutils](https://gitweb.torproject.org/builders/tor-browser-build.git/tree/projects/binutils) ever since. However their patch only made it into binutils at the [start of this year](https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=dc9bd8c92af67947db44b3cb428c050259b15cd0). It adds an `--enable-reloc-section` flag, which is turned on by default if you are using `--dynamic-base`. In the mean time this issue has also been worked around by other projects, such as FFmpeg, see [this commit](91b668acd6).
I have checked our recent supported Windows release binaries, and they do contain a `.reloc` section. From what I understand, we are using all the right compile/linker flags, including `-pie` & `-fPIE`, and have never run into the crashing/entrypoint issues that other projects might have seen.
One other thing worth noting here, it how Debian/Ubuntu patch the binutils that they distribute, because that's what we end up using in our gitian builds.
In the binutils-mingw-w64 in Bionic (18.04), which we currently use in gitian, PE hardening options/security flags are enabled by default. See the [changelog](https://changelogs.ubuntu.com/changelogs/pool/universe/b/binutils-mingw-w64/binutils-mingw-w64_8ubuntu1/changelog) and the [relevant commit](452b3013b8).
However in Focal (20.04), this has now been reversed. PE hardening options are no-longer the default. See the [changelog](https://changelogs.ubuntu.com/changelogs/pool/universe/b/binutils-mingw-w64/binutils-mingw-w64_8.8/changelog) and [relevant commit](7bd8b2fbc2), which cites same .reloc issue mentioned here.
Given that we explicitly specify/opt-in to everything that we want to use, the defaults aren't necessarily an issue for us. However I think it highlights the importance of continuing to be explicit about what we want, and not falling-back or relying on upstream.
This was also prompted by the possibility of us doing link time garbage collection, see #18579 & #18605. It seemed some sanity checks would be worthwhile in-case the linker goes haywire while garbage collecting.
I think Guix is going to bring great benefits when dealing with these kinds of issues. Carl you might have something to say in that regard.
ACKs for top commit:
dongcarl:
ACK 3e38023af724a76972d39cbccfb0bba4c54a0323
Tree-SHA512: af14d63bdb334bde548dd7de3e0946556b7e2598d817b56eb4e75b3f56c705c26aa85dd9783134c4b6a7aeb7cb4de567eed996e94d533d31511f57ed332287da
8334ee31f868f0f9baf0920d14d20174ed889dbe scripts: add MACHO LAZY_BINDINGS test to test-security-check.py (fanquake)
7b99c7454cdb74cd9cd7a5eedc2fb9d0a19df456 scripts: add MACHO Canary check to security-check.py (fanquake)
Pull request description:
7b99c7454cdb74cd9cd7a5eedc2fb9d0a19df456 uses `otool -Iv` to check for `___stack_chk_fail` in the macOS binaries. Similar to the [ELF check](https://github.com/bitcoin/bitcoin/blob/master/contrib/devtools/security-check.py#L105). Note that looking for a triple underscore prefixed function (as opposed to two for ELF) is correct for the macOS binaries. i.e:
```bash
otool -Iv bitcoind | grep chk
0x00000001006715b8 509 ___memcpy_chk
0x00000001006715be 510 ___snprintf_chk
0x00000001006715c4 511 ___sprintf_chk
0x00000001006715ca 512 ___stack_chk_fail
0x00000001006715d6 517 ___vsnprintf_chk
0x0000000100787898 513 ___stack_chk_guard
```
8334ee31f868f0f9baf0920d14d20174ed889dbe is a follow up to #18295 and adds test cases to `test-security-check.py` that for some reason I didn't add at the time. I'll sort out #18434 so that we can run these tests in the CI.
ACKs for top commit:
practicalswift:
ACK 8334ee31f868f0f9baf0920d14d20174ed889dbe: Mitigations are important. Important things are worth asserting :)
jonasschnelli:
utACK 8334ee31f868f0f9baf0920d14d20174ed889dbe.
Tree-SHA512: 1aa5ded34bbd187eddb112b27278deb328bfc21ac82316b20fab6ad894f223b239a76b53dab0ac1770d194c1760fcc40d4da91ec09959ba4fc8eadedb173936a
b155fcda5186c59fc4fb2a9eaaf791d132e0ab30 doc: fix typo in configure.ac (fanquake)
20a30922fbf6ba14e250ca649239af115dbbe7b0 doc: note why we can't use thread_local with glibc back compat (fanquake)
Pull request description:
Given that we went through a [gitian build](https://github.com/bitcoin/bitcoin/pull/18681) to remember why this is the case, we might as well make a note of it in configure.ac.
[From #18681](https://github.com/bitcoin/bitcoin/pull/18681#issuecomment-615526634):
Looking at the Linux build log, this has failed with:
```bash
Checking glibc back compat...
bitcoind: symbol __cxa_thread_atexit_impl from unsupported version GLIBC_2.18
bitcoind: failed IMPORTED_SYMBOLS
bitcoin-cli: symbol __cxa_thread_atexit_impl from unsupported version GLIBC_2.18
bitcoin-cli: failed IMPORTED_SYMBOLS
bitcoin-tx: symbol __cxa_thread_atexit_impl from unsupported version GLIBC_2.18
bitcoin-tx: failed IMPORTED_SYMBOLS
bitcoin-wallet: symbol __cxa_thread_atexit_impl from unsupported version GLIBC_2.18
bitcoin-wallet: failed IMPORTED_SYMBOLS
test/test_bitcoin: symbol __cxa_thread_atexit_impl from unsupported version GLIBC_2.18
test/test_bitcoin: failed IMPORTED_SYMBOLS
bench/bench_bitcoin: symbol __cxa_thread_atexit_impl from unsupported version GLIBC_2.18
bench/bench_bitcoin: failed IMPORTED_SYMBOLS
qt/bitcoin-qt: symbol __cxa_thread_atexit_impl from unsupported version GLIBC_2.18
```
`__cxa_thread_atexit_impl` is used for [thread_local variable destruction](https://sourceware.org/glibc/wiki/Destructor%20support%20for%20thread_local%20variables):
> To implement this support, glibc defines __cxa_thread_atexit_impl exclusively for use by libstdc++ (which has the __cxa_thread_atexit to wrap around it), that registers destructors for thread_local variables in a list. Upon thread or process exit, the destructors are called in reverse order in which they were added.
As suggested, this only became available in glibc 2.18. From the [2.18 release notes](https://sourceware.org/legacy-ml/libc-alpha/2013-08/msg00160.html):
> * Add support for calling C++11 thread_local object destructors on thread
and program exit. This needs compiler support for offloading C++11
destructor calls to glibc.
ACKs for top commit:
hebasto:
ACK b155fcda5186c59fc4fb2a9eaaf791d132e0ab30
Tree-SHA512: 5b9567e4a70598a4b0b91956f44ae0d93091db17c84cbf9817dac6cfa992c97d3438a8b1bb66644c74891f2149e44984daed445d22de93ca8858c5b0eabefb40
5ca90f8b598978437340bb8467f527b9edfb2bbf scripts: add MACHO lazy bindings check to security-check.py (fanquake)
Pull request description:
This is a slightly belated follow up to #17686 and some discussion with Cory. It's not entirely clear if we should make this change due to the way the macOS dynamic loader appears to work. However I'm opening this for some discussion. Also related to #17768.
#### Issue:
[`LD64`](https://opensource.apple.com/source/ld64/) doesn't set the [MH_BINDATLOAD](https://opensource.apple.com/source/xnu/xnu-6153.11.26/EXTERNAL_HEADERS/mach-o/loader.h.auto.html) bit in the header of MACHO executables, when building with `-bind_at_load`. This is in contradiction to the [documentation](https://opensource.apple.com/source/ld64/ld64-450.3/doc/man/man1/ld.1.auto.html):
```bash
-bind_at_load
Sets a bit in the mach header of the resulting binary which tells dyld to
bind all symbols when the binary is loaded, rather than lazily.
```
The [`ld` in Apples cctools](https://opensource.apple.com/source/cctools/cctools-927.0.2/ld/layout.c.auto.html) does set the bit, however the [cctools-port](https://github.com/tpoechtrager/cctools-port/) that we use for release builds, bundles `LD64`.
However; even if the linker hasn't set that bit, the dynamic loader ([`dyld`](https://opensource.apple.com/source/dyld/)) doesn't seem to ever check for it, and from what I understand, it looks at a different part of the header when determining whether to lazily load symbols.
Note that our release binaries are currently working as expected, and no lazy loading occurs.
#### Example:
Using a small program, we can observe the behaviour of the dynamic loader.
Conducted using:
```bash
clang++ --version
Apple clang version 11.0.0 (clang-1100.0.33.17)
Target: x86_64-apple-darwin18.7.0
ld -v
@(#)PROGRAM:ld PROJECT:ld64-530
BUILD 18:57:17 Dec 13 2019
LTO support using: LLVM version 11.0.0, (clang-1100.0.33.17) (static support for 23, runtime is 23)
TAPI support using: Apple TAPI version 11.0.0 (tapi-1100.0.11)
```
```cpp
#include <iostream>
int main() {
std::cout << "Hello World!\n";
return 0;
}
```
Compile and check the MACHO header:
```bash
clang++ test.cpp -o test
otool -vh test
...
Mach header
magic cputype cpusubtype caps filetype ncmds sizeofcmds flags
MH_MAGIC_64 X86_64 ALL LIB64 EXECUTE 16 1424 NOUNDEFS DYLDLINK TWOLEVEL WEAK_DEFINES BINDS_TO_WEAK PIE
# Run and dump dynamic loader bindings:
DYLD_PRINT_BINDINGS=1 DYLD_PRINT_TO_FILE=no_bind.txt ./test
Hello World!
```
Recompile with `-bind_at_load`. Note still no `BINDATLOAD` flag:
```bash
clang++ test.cpp -o test -Wl,-bind_at_load
otool -vh test
Mach header
magic cputype cpusubtype caps filetype ncmds sizeofcmds flags
MH_MAGIC_64 X86_64 ALL LIB64 EXECUTE 16 1424 NOUNDEFS DYLDLINK TWOLEVEL WEAK_DEFINES BINDS_TO_WEAK PIE
...
DYLD_PRINT_BINDINGS=1 DYLD_PRINT_TO_FILE=bind.txt ./test
Hello World!
```
If we diff the outputs, you can see that `dyld` doesn't perform any lazy bindings when the binary is compiled with `-bind_at_load`, even if the `BINDATLOAD` flag is not set:
```diff
@@ -1,11 +1,27 @@
+dyld: bind: test:0x103EDF030 = libc++.1.dylib:__ZNKSt3__16locale9use_facetERNS0_2idE, *0x103EDF030 = 0x7FFF70C9FA58
+dyld: bind: test:0x103EDF038 = libc++.1.dylib:__ZNKSt3__18ios_base6getlocEv, *0x103EDF038 = 0x7FFF70CA12C2
+dyld: bind: test:0x103EDF068 = libc++.1.dylib:__ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEE6sentryC1ERS3_, *0x103EDF068 = 0x7FFF70CA12B6
+dyld: bind: test:0x103EDF070 = libc++.1.dylib:__ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEE6sentryD1Ev, *0x103EDF070 = 0x7FFF70CA1528
+dyld: bind: test:0x103EDF080 = libc++.1.dylib:__ZNSt3__16localeD1Ev, *0x103EDF080 = 0x7FFF70C9FAE6
<trim>
-dyld: lazy bind: test:0x10D4AC0C8 = libsystem_platform.dylib:_strlen, *0x10D4AC0C8 = 0x7FFF73C5C6E0
-dyld: lazy bind: test:0x10D4AC068 = libc++.1.dylib:__ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEE6sentryC1ERS3_, *0x10D4AC068 = 0x7FFF70CA12B6
-dyld: lazy bind: test:0x10D4AC038 = libc++.1.dylib:__ZNKSt3__18ios_base6getlocEv, *0x10D4AC038 = 0x7FFF70CA12C2
-dyld: lazy bind: test:0x10D4AC030 = libc++.1.dylib:__ZNKSt3__16locale9use_facetERNS0_2idE, *0x10D4AC030 = 0x7FFF70C9FA58
-dyld: lazy bind: test:0x10D4AC080 = libc++.1.dylib:__ZNSt3__16localeD1Ev, *0x10D4AC080 = 0x7FFF70C9FAE6
-dyld: lazy bind: test:0x10D4AC070 = libc++.1.dylib:__ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEE6sentryD1Ev, *0x10D4AC070 = 0x7FFF70CA1528
```
Note: `dyld` also has a `DYLD_BIND_AT_LAUNCH=1` environment variable, that when set, will force any lazy bindings to be non-lazy:
```bash
dyld: forced lazy bind: test:0x10BEC8068 = libc++.1.dylib:__ZNSt3__113basic_ostream
```
#### Thoughts:
After looking at the dyld source, I can't find any checks for `MH_BINDATLOAD`. You can see the flags it does check for, such as MH_PIE or MH_BIND_TO_WEAK [here](https://opensource.apple.com/source/dyld/dyld-732.8/src/ImageLoaderMachO.cpp.auto.html).
It seems that the lazy binding of any symbols depends on whether or not [lazy_bind_size](https://opensource.apple.com/source/xnu/xnu-6153.11.26/EXTERNAL_HEADERS/mach-o/loader.h.auto.html) from the `LC_DYLD_INFO_ONLY` load command is > 0. Which was mentioned in [#17686](https://github.com/bitcoin/bitcoin/pull/17686#issue-350216254).
#### Changes:
This PR is one of [Corys commits](7b6ba26178), that I've rebased and modified to make build. I've also included an addition to the `security-check.py` script to check for the flag.
However, given the above, I'm not entirely sure this patch is the correct approach. If the linker no-longer inserts it, and the dynamic loader doesn't look for it, there might be little benefit to setting it. Or, maybe this is an oversight from Apple and needs some upstream discussion. Looking for some thoughts / Concept ACK/NACK.
One alternate approach we could take is to drop the patch and modify security-check.py to look for `lazy_bind_size` == 0 in the `LC_DYLD_INFO_ONLY` load command, using `otool -l`.
ACKs for top commit:
theuni:
ACK 5ca90f8b598978437340bb8467f527b9edfb2bbf
Tree-SHA512: 444022ea9d19ed74dd06dc2ab3857a9c23fbc2f6475364e8552d761b712d684b3a7114d144f20de42328d1a99403b48667ba96885121392affb2e05b834b6e1c
7142d50ac33e0ad7d24e49e04c1fc7e3e769ed46 scripts: rename test_64bit_PE to test_PE (fanquake)
edaca2dd123cef958699c07ab248cf0ffc71af07 scripts: add MACHO NX check to security-check.py (fanquake)
1a4e9f32efcc5f6a74290446dc58784fd85c7b31 scripts: add MACHO tests to test-security-check.py (fanquake)
Pull request description:
Adds tests for the MACHO checks in security-check.py:
ac579ada7e/contrib/devtools/security-check.py (L212-L214)
I'm planning on following up with more checks in security-check.py, and corresponding tests in test-security-check.py.
Note that you'll probably have to be on macOS to run them. You can run just this suite with `python3 test-security-check.py TestSecurityChecks.test_MACHO`.
ACKs for top commit:
laanwj:
ACK 7142d50ac33e0ad7d24e49e04c1fc7e3e769ed46
Tree-SHA512: ace3ca9f6df5d4fedd5988938fb7dc7563ec7dc587aa275f780b5f51e9b8d7d6f7768e0a1e05ce438510a07b8640aba92c76847b30c2990f46c66b78a0acf960
d76894987d0277e8011932ab7dfd77c537f8ea6e logging: enable thread_local usage on macOS (fanquake)
Pull request description:
Now that we're building against a newer SDK (`10.14`), we should be able to enable `thread_local` usage on macOS. Have tested building and running locally, as well as cross-compiling and running the binaries on a macOS 10.14 system.
#### master 8a56f79d491271120abc3843c46e9dda44edd308
```bash
src/bitcoind -logthreadnames=1
2020-02-06T04:38:33Z [] Bitcoin Core version v0.19.99.0-8a56f79d4 (release build)
2020-02-06T04:38:33Z [] Assuming ancestors of block 00000000000000000005f8920febd3925f8272a6a71237563d78c2edfdd09ddf have valid signatures.
2020-02-06T04:38:33Z [] Setting nMinimumChainWork=000000000000000000000000000000000000000008ea3cf107ae0dec57f03fe8
2020-02-06T04:38:33Z [] Using the 'sse4(1way),sse41(4way),avx2(8way)' SHA256 implementation
2020-02-06T04:38:33Z [] Using RdSeed as additional entropy source
```
#### this PR d76894987d0277e8011932ab7dfd77c537f8ea6e
```bash
checking for thread_local support... yes
...
src/bitcoind -logthreadnames=1
2020-02-06T04:17:49Z [net] net thread start
2020-02-06T04:17:49Z [opencon] opencon thread start
2020-02-06T04:17:49Z [dnsseed] dnsseed thread start
2020-02-06T04:17:49Z [init] init message: Done loading
2020-02-06T04:17:49Z [msghand] msghand thread start
2020-02-06T04:17:49Z [addcon] addcon thread start
...
2020-02-06T04:17:54Z [init] tor: Thread interrupt
2020-02-06T04:17:54Z [init] Shutdown: In progress...
```
From the [Xcode 8 release notes](https://developer.apple.com/library/archive/releasenotes/DeveloperTools/RN-Xcode/Chapters/Introduction.html#//apple_ref/doc/uid/TP40001051-CH1-SW78)
> C++ now supports the thread_local keyword, which declares thread-local storage (TLS) and supports C++ classes with non-trivial constructors and destructors. (9001553)
ACKs for top commit:
jonasschnelli:
Tested ACK d76894987d0277e8011932ab7dfd77c537f8ea6e
nijynot:
ACK d768949
hebasto:
ACK d76894987d0277e8011932ab7dfd77c537f8ea6e
Tree-SHA512: 48f3e4104b80bd7b6aedcef10bb1957b073530130f33af7c5cb59e876ac3f5480e53d7af1c0b226d809fe9eef1add3d6c3fb6de4af174966202c6030060ea823
0e7c90eb37a687158c261ddd1ff9f1028a1e7012 test: speed up wallet_avoidreuse.py (Jon Atack)
6d50b2606ea9249627556051637080c3587b1b04 test: add logging to wallet_avoidreuse.py (Jon Atack)
Pull request description:
Inspired by PRs #17340 and #15881.
- add logging
- pass -whitelist in `set_test_params` to speed up transaction relay
`wallet_avoidreuse.py` is not intended to test P2P transaction relay/timing, so it should be fine to do this here. This reduces test run time variability and speeds up the test by 2-3 times on average.
Test run times in seconds:
- before: 20, 24, 22, 17, 27, 40, 30
- after: 10, 10, 8, 9, 10, 7, 8
ACKs for top commit:
MarcoFalke:
ACK 0e7c90eb37a687158c261ddd1ff9f1028a1e7012 🐊
fanquake:
ACK 0e7c90eb37a687158c261ddd1ff9f1028a1e7012
Tree-SHA512: 6d954a0aaf402c9594201626b59d29263479059e68fa5155bb44ed973cd0c3347729dd78b78b4d5a2275e45da365dc1afb4cc7e3293dea33fcc2e3e83a39faf5
1ba49bcdc216162f513e74e371ee9f26418a390e build: pass --enable-option-checking to applicable packages (fanquake)
bcff8e21b1bb360c3cf1e1d2e1a2a54ec7581720 build: only pass --disable-dependency-tracking to packages that understand it (fanquake)
Pull request description:
By blanket passing `--disable-dependency-tracking` to all depends packages we end up with warnings (i.e in `bdb` or `freetype`) like:
```bash
configure: WARNING: unrecognized options: --disable-dependency-tracking
```
Instead, only pass it to packages that actually understand it. Related to https://github.com/bitcoin/bitcoin/issues/16354.
More info on `--disable-dependency-tracking` available [here](https://www.gnu.org/software/automake/manual/html_node/Dependency-Tracking.html).
This PR also adds `--enable-option-checking` as a configure option to all applicable packages.
ACKs for top commit:
laanwj:
ACK 1ba49bcdc216162f513e74e371ee9f26418a390e
theuni:
ACK 1ba49bcdc216162f513e74e371ee9f26418a390e
Tree-SHA512: 6d3143ad5f5d1abed5e0a0b2ffbb4323f21c7bf24b0b8df26fb1b3cd16cf5309bbb830aa5aaec99164d5bbe8e9c62b97aa3e97ee1ddc2c7612bf8ff88a63885e
b3b6b6f62fcabea9818e8049dba714d0d0ef8ab6 gui: don't disable the sync overlay when wallet is disabled (Ben Carman)
Pull request description:
Continuation of #13848.
When running with `-disablewallet` the sync modal is now available by clicking on the progress bar or `syncing` icon.
[Current Image of what the window looks like](https://imgur.com/6LsoT2l)
Fixes#13828.
ACKs for top commit:
jonasschnelli:
Tested ACK b3b6b6f62fcabea9818e8049dba714d0d0ef8ab6
Tree-SHA512: 325bc22a0b692bfb8fcc9d84e02dfc506146028b97b3609e23c2c45288c79b8aead1ad2e9b8d692f5f6771b4d2aee63fbe71bfaeaf17d260865da32ab3631e07
b96ed0396294fc4fa89d83ceab6bc169dd09f002 [wallet] Remove pruning check for -rescan option (John Newbery)
eea462de9c652dca556ad241d2126b10790f67f8 [wallet] Remove package limit config access from wallet (John Newbery)
Pull request description:
Removes wallet access to `-limitancestorcount`, `-limitdescendantcount` and `-prune`:
- `-limitancestorcount` and `-limitdescendantcount` are now accessed with a method `getPackageLimits` in the `Chain` interface.
- `-prune` is not required. It was only used in wallet component initiation to prevent running `-rescan` when pruning was enabled. This check is not required.
Partially addresses #17137.
ACKs for top commit:
MarcoFalke:
Tested ACK b96ed0396294fc4fa89d83ceab6bc169dd09f002
ryanofsky:
Code review ACK b96ed0396294fc4fa89d83ceab6bc169dd09f002
promag:
Code review ACK b96ed0396294fc4fa89d83ceab6bc169dd09f002.
ariard:
ACK b96ed03, check there isn't left anymore wallet access to node arguments.
Tree-SHA512: 90c8e3e083acbd37724f1bccf63dab642cf9ae95cc5e684872a67443ae048b4fdbf57b52ea47c5a1da6489fd277278fe2d9bbe95e17f3d4965a1a0fbdeb815bf
f4c8953b0073e6bc37abd18ec4a5cbc3ea9719a1 Add missing fields in TransactionDescriptionString and others (Antoine Riard)
353010849185cda53c97da1f5089565dccf6f16a MOVEONLY : move RPC wallets helpers to TransactionDescriptionString (Antoine Riard)
Pull request description:
Knowledge of `walletconflicts` field existence is really nice when you're debugging conflicts. Was added in #3671 but never documented in RPC helps.
Others were added after a quick skim, we may still have missing ones in wallet rpcs.
ACKs for top commit:
MarcoFalke:
re-ACK f4c8953b0073e6bc37abd18ec4a5cbc3ea9719a1 (only change is addressing my nits)
kristapsk:
ACK f4c8953b0073e6bc37abd18ec4a5cbc3ea9719a1
Tree-SHA512: 2bea4d8743399fb152f942df7454548b896b2ad5654fd4bf60253afec1a5387ef8797ced97776dc7ba4912291263c08abe7c2b608c6a28f9a0df67be4ebc4635
11fdfcf7f940fab48625d102e825a59c16ad4fbc Show addresses for "SendToSelf" transactions (Hennadii Stepanov)
Pull request description:
Fix#11464Fix#12688
Ref: #11471 by jonasschnelli
Note: change addresses are not recognized (ref: https://github.com/bitcoin/bitcoin/pull/11471#discussion_r180547041)
Result:
ACKs for top commit:
jonasschnelli:
Tested ACK 11fdfcf7f940fab48625d102e825a59c16ad4fbc
fanquake:
ACK 11fdfcf7f940fab48625d102e825a59c16ad4fbc - did the bare minimum testing.
Tree-SHA512: 2678a2fdf017c376750c73fdc751b7838b0d3a970ba02e9032e4c5824494362672036c3ebf87b425aefdfe197fb952b70e4b7b6011077abb39a8bfc1ae14dfd2
faea56400d rpc: Add lock annotations to block{,header}ToJSON (MarcoFalke)
fab00a5cb9 rpc: Serialize in getblock without cs_main (MarcoFalke)
fa1c3591ad rpc: Use IsValidNumArgs in getblock (MarcoFalke)
Pull request description:
No need to hold cs_main when serializing a struct to json
Fixes: #15925
ACKs for commit faea56:
jnewbery:
utACK faea56400d5578023133cf4d1c761cdeb0c3e3da
jonasschnelli:
utACK faea56400d5578023133cf4d1c761cdeb0c3e3da
Tree-SHA512: 005d378cda1e6024e9f5142f99a8adbefe202cd7bfeaafee55eb909e8990a3790aa27fcf5dd16119cc9afe9dc8bd30f660de40233316781669be166bac3018e7
a004673c54d4c015775e0baced21f3fa961bf754 qt: Add LogQtInfo() function (Hennadii Stepanov)
Pull request description:
This PR adds some info to `debug.log` I found useful for testing (e.g., on Wayland) and debugging issues like #17153:
```
$ ./src/qt/bitcoin-qt -printtoconsole | head -n 6
2020-01-04T14:57:40Z [main] Bitcoin Core version v0.19.99.0-0df287f4e (release build)
2020-01-04T14:57:40Z [main] InitParameterInteraction: parameter interaction: -externalip set -> setting -discover=0
2020-01-04T14:57:40Z [main] Qt 5.9.5 (dynamic), plugin=xcb (dynamic)
2020-01-04T14:57:40Z [main] System: Linux Mint 19.3, x86_64-little_endian-lp64
2020-01-04T14:57:40Z [main] Screen: HDMI-1 1600x1200, pixel ratio=1.0
2020-01-04T14:57:40Z [main] Assuming ancestors of block 00000000000000b7ab6ce61eb6d571003fbe5fe892da4c9b740c49a07542462d have valid signatures.
```
ACKs for top commit:
laanwj:
ACK a004673c54d4c015775e0baced21f3fa961bf754
Tree-SHA512: 496bcfd4870a2730eab92b96b3e74989a7904b21369c372b6d4368f4ca2c141e2fdc1348a1fdd18cb68bb144dcea01d3023bb782f9d030e330c187f6a5a1a082
71af793512100ee7d508c3fb815af47925fe80ba scripts: fix check-symbols & check-security argument passing (fanquake)
Pull request description:
The first argument in `bin_PROGRAMS` (`bitcoind`) was being silently consumed and never passed into the [`security-check.py`](https://github.com/bitcoin/bitcoin/blob/master/contrib/devtools/security-check.py) or [`symbol-check.py`](https://github.com/bitcoin/bitcoin/blob/master/contrib/devtools/symbol-check.py) scripts.
This seems to have been the case since the scripts were added to the makefile in f3d3eaf78e.
Example of the behavior:
```python
# touch a, touch b, touch c
# python3 args.py < a b c
import sys
if __name__ == '__main__':
print(sys.argv)
# ['args.py', 'b', 'c']
# if you add some lines to "a",
# you'll see them here..
for line in sys.stdin:
print(line)
```
ACKs for top commit:
laanwj:
ACK 71af793512100ee7d508c3fb815af47925fe80ba
Tree-SHA512: 9d0b975a11f66fd87a76654d210808000a629c9cce4c760f71e8a2bcb4e99b9109419f2306db67cf9b12c28e40b96ae722b7c9b4569b2b8bacd469fb99db30c3
5ebc6b0eb267e0552c66fffc5e5afe7df8becf80 bitcoind: update -avoidpartialspends description to account for auto-enable for avoid_reuse wallets (Karl-Johan Alm)
ada258f8c8f92d44d893cf9f22d15acdeca40b1a doc: release notes for avoid_reuse (Karl-Johan Alm)
27669551da52099e4a6a401acd7aa32b32832423 wallet: enable avoid_partial_spends by default if avoid_reuse is set (Karl-Johan Alm)
8f2e208f7c0468f9ba92bc789a698281b1c81284 test: add test for avoidreuse feature (Karl-Johan Alm)
0bdfbd34cf4015de87741ff549db35e5064f4e16 wallet/rpc: add 'avoid_reuse' option to RPC commands (Karl-Johan Alm)
f904723e0d5883309cb0dd14b826bc45c5e776fb wallet/rpc: add setwalletflag RPC and MUTABLE_WALLET_FLAGS (Karl-Johan Alm)
8247a0da3a46d7c38943ee0304343ab7465305bd wallet: enable avoid_reuse feature (Karl-Johan Alm)
eec15662fad917b169f5e3b8baaf4301dcf00a7b wallet: avoid reuse flags (Karl-Johan Alm)
58928098c299efdc7c5ddf2dc20716ca5272f21b wallet: make IsWalletFlagSet() const (Karl-Johan Alm)
129a5bafd9a3efa2fa16d780885048a06566d262 wallet: rename g_known_wallet_flags constant to KNOWN_WALLET_FLAGS (Karl-Johan Alm)
Pull request description:
Add a new wallet flag called `avoid_reuse` which, when enabled, will keep track of when a specific destination has been spent from, and will actively "blacklist" any new UTXOs which send to an already-spent-from destination.
This improves privacy, as a payer could otherwise begin tracking a payee's wallet by regularly peppering a known UTXO with dust outputs, which would then be scooped up and used in payments by the payee, allowing the payer to map out (1) the inputs owned by the payee and (2) the destinations to which the payee is making payments.
This replaces #10386 and together with the (now merged) #12257 it addresses #10065 in full. The concerns raised in https://github.com/bitcoin/bitcoin/pull/10386#issuecomment-302361381 are also addressed due to #12257.
~~Note: this builds on top of #15780.~~ (merged)
ACKs for commit 5ebc6b:
jnewbery:
ACK 5ebc6b0eb
laanwj:
Concept and code-review ACK 5ebc6b0eb267e0552c66fffc5e5afe7df8becf80
meshcollider:
Code review ACK 5ebc6b0eb2
achow101:
ACK 5ebc6b0eb267e0552c66fffc5e5afe7df8becf80 modulo above nits
Tree-SHA512: fdef45826af544cbbb45634ac367852cc467ec87081d86d08b53ca849e588617e9a0a255b7e7bb28692d15332de58d6c3d274ac003355220e4213d7d9070742e
244501fc85a1319857efb227093c0e71c1d5a01e depends: disable unused qt networking features (fanquake)
29d56c62b7f206d42f0908819ff2e1926737f988 depends: -optimized-qmake is now -optimized-tools (fanquake)
ccdda96804088ec3ad01aec5ab0ff8e9b05b161b depends: skip building qt proxies (fanquake)
Pull request description:
Somewhat of a followup to removing BIP70 support in #17165. This removes networking features from our Qt build. This also removes the need to link against the `CFNetwork` and `SystemConfiguration` libraries on macOS.
```diff
src/qt/bitcoin-qt:
/usr/lib/libSystem.B.dylib
/System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
/System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
/System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices
/System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
/System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
-/System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration
/System/Library/Frameworks/CoreGraphics.framework/Versions/A/CoreGraphics
/System/Library/Frameworks/Carbon.framework/Versions/A/Carbon
/usr/lib/libc++.1.dylib
-/System/Library/Frameworks/CFNetwork.framework/Versions/A/CFNetwork
/System/Library/Frameworks/CoreText.framework/Versions/A/CoreText
/System/Library/Frameworks/ImageIO.framework/Versions/A/ImageIO
/usr/lib/libobjc.A.dylib
```
> Introduced the -optimized-tools option; supersedes -optimized-qmake.
`optimized-qmake` became `optimized-tools` in Qt 5.6.0. While the former still works, we can use the newer flag.
A diff of the removed symbols is available [here](https://gist.github.com/fanquake/9c8d5961c91f90a2966191367adfb391).
We still need to actually build the network module, because we are using `QLocalServer` & `QLocalSocket` in the payment server.
ACKs for top commit:
Sjors:
Code review ACK 244501fc85a1319857efb227093c0e71c1d5a01e: just a rebase (_updated since I accidentally repeated the previous hash_)
practicalswift:
ACK 244501fc85a1319857efb227093c0e71c1d5a01e -- diff looks correct
promag:
Code review ACK 244501fc85a1319857efb227093c0e71c1d5a01e.
Tree-SHA512: 79734e3c96c40e7e484c86ac4cd4f738c05fcebe4771aeac443883f618a6c766e667909d5f8f14f9bd82f43206387c952458c5fa765cd0830f8beda6e6ac80ae
78f9b5160fea32f85c6ced16b3b0cccda6d3b181 Do not show list for the only recipient. (Hennadii Stepanov)
2ee756f0411c467fc638373ea68d6cb5ced46974 Show recipient list as detailedText of QMessageBox (Hennadii Stepanov)
654e419549fb5f1c360843d48e66eb098bbf5a83 Make SendConfirmationDialog fully fledged (Hennadii Stepanov)
Pull request description:
Fix#15667
With this PR:
ACKs for commit 78f9b5:
laanwj:
code review ACK 78f9b5160fea32f85c6ced16b3b0cccda6d3b181
Tree-SHA512: f868d78d01b0898aff2277fa3a7e8c6f936acbbcfa8a0323cddcd9daba4a998030c667bd803ae67c2b9179ed8082a48a67568e9ba3c8d14e3a2d88d93ada94fa
aa410c2b17 rpc: Validate maxfeerate with AmountFromValue (João Barbosa)
Pull request description:
With this change `maxfeerate` can also be set as a string, accordingly to the help test:
```
maxfeerate (numeric or string,
```
Beside, there are no tests for the removed errors.
ACKs for commit aa410c:
meshcollider:
utACK aa410c2b17
MarcoFalke:
utACK aa410c2b17 Good catch
Tree-SHA512: f3bfea91dc7daa943729e270585dbf333055aeda805fbd01eaab20a7e0e6147382647c11525334382d198df0d3d45da6102b541efda5a1361f96271c98d5d89d
7aab8d1024996c7c422bd34a8226df0117b813f7 [style] Code style fixups in GetWarnings() (John Newbery)
492c6dc1e742a62599dc6d5ba6c3896825b5144f util: change GetWarnings parameter to bool (John Newbery)
869b6314fd180856b6054fff28b5de994252c54c [qt] remove unused parameter from getWarnings() (John Newbery)
Pull request description:
`GetWarnings()` changes the format of the output warning string based on a passed-in string argument that can be set to "gui" or "statusbar".
Change the argument to a bool:
- there are only two types of behaviour, so a bool is a more natural argument type
- changing the name to `verbose` does not set any expectations for the how the calling code will use the returned string (currently, `statusbar` is used for RPC warnings, not a status bar)
- removes some error-handling code for when the passed-in string is not one of the two strings expected.
ACKs for top commit:
laanwj:
code review ACK 7aab8d1024996c7c422bd34a8226df0117b813f7
practicalswift:
ACK 7aab8d1024996c7c422bd34a8226df0117b813f7 -- diff looks correct :)
MarcoFalke:
ACK 7aab8d1024996c7c422bd34a8226df0117b813f7 otherwise.
promag:
Code review ACK 7aab8d1024996c7c422bd34a8226df0117b813f7.
Tree-SHA512: 75882c6e3e44aa9586411b803149b36ba487f4eb9cac3f5c8f07cd9f586870bba4488a51e674cf8147f05718534f482836e6a4e3f66e0d4ef6821900c7dfd04e
a5089f62bda9a39c1d6cbba285477670f1aa1f3f fix directory path for secp256k1 subtree in developer-notes (hackerrdave)
Pull request description:
Documentation update to fix the directory path of the `secp256k1` subtree in the developer notes
ACKs for top commit:
laanwj:
ACK a5089f62bda9a39c1d6cbba285477670f1aa1f3f
Tree-SHA512: d0986721d7091af26edaee769db78c9aabac25bbaddb2a1bfa96c7208187226e280e9c38897b5227ee6c9e40d5a1af86bb7c58e72c6a30a94a478c4bf54c086e
* refactor: create separate function for processing dsq messages in client.cpp
* refactor: avoid duplicate checks in CCoinJoinClientSession::ProcessMessage
* test: create tests for mixing and pending dsa requests in coinjoin_tests.cpp
* test: create tests for CTxDSIn in coinjoin_tests.cpp
* test: create tests for CoinJoinAccept in coinjoin_tests.cpp
* test: create tests for CoinJoinStatusUpdate in coinjoin_tests.cpp
* removal of check peer version
* Apply suggestions from code review
Co-authored-by: UdjinM6 <UdjinM6@users.noreply.github.com>
7c9e821c4e6cb186208ead9c8df616d1f393a49a scripts: add MACHO NOUNDEFS check to security-check.py (fanquake)
4ca92dc6d3f3e487d63286d8871d1829b3d279ff scripts: add MACHO PIE check to security-check.py (fanquake)
Pull request description:
This uses `otool -vh` to print the mach header and look for the `PIE` flag:
```bash
otool -vh src/bitcoind
Mach header
magic cputype cpusubtype caps filetype ncmds sizeofcmds flags
MH_MAGIC_64 X86_64 ALL LIB64 EXECUTE 24 2544 NOUNDEFS DYLDLINK TWOLEVEL WEAK_DEFINES BINDS_TO_WEAK PIE
```
From [`mach-o/loader.h`](https://opensource.apple.com/source/cctools/cctools-927.0.2/include/mach-o/loader.h.auto.html):
```c
#define MH_PIE 0x200000 /* When this bit is set, the OS will
load the main executable at a
random address. Only used in
MH_EXECUTE filetypes. */
```
ACKs for top commit:
laanwj:
code review ACK 7c9e821c4e6cb186208ead9c8df616d1f393a49a
Tree-SHA512: 5ba2f60440d0e31c70371a355c91ca4f723d80f7287d04e2098bf5b11892cc74216ff8f1454603c4db9675d4f7983614843b992b8dcfca0309aadf2aa7ab2e4b
90df92206cfce4e61eff9d584112643512f6b91c test: Change filemode of rpc_whitelist.py (Emil Engler)
Pull request description:
All python tests have the file mode `755`.
Probably due to a mistake `rpc_whitelist.py` is the only test with the permission `644`.
This PR makes it coherent with the other tests and updates it to `755` as well.
ACKs for top commit:
practicalswift:
ACK 90df92206cfce4e61eff9d584112643512f6b91c -- all tests should be executable
Tree-SHA512: b9e69cb5184a3bbee4c7b14ac35985145a9fd3403d0e449d79f15c18e9660cafec495d639f5f730e0c69dde5f4a3d7590b4e42d385e794cd02add1f4e3b785e7
2081442c421cc4376e5d7839f68fbe7630e89103 test: Add test for rpc_whitelist (Emil Engler)
7414d3820c833566b4f48c6c120a18bf53978c55 Add RPC Whitelist Feature from #12248 (Jeremy Rubin)
Pull request description:
Summary
====
This patch adds the RPC whitelisting feature requested in #12248. RPC Whitelists help enforce application policies for services being built on top of Bitcoin Core (e.g., your Lightning Node maybe shouldn't be adding new peers). The aim of this PR is not to make it advisable to connect your Bitcoin node to arbitrary services, but to reduce risk and prevent unintended access.
Using RPC Whitelists
====
The way it works is you specify (in your bitcoin.conf) configurations such as
```
rpcauth=user1:4cc74397d6e9972e5ee7671fd241$11849357f26a5be7809c68a032bc2b16ab5dcf6348ef3ed1cf30dae47b8bcc71
rpcauth=user2:181b4a25317bff60f3749adee7d6bca0$d9c331474f1322975fa170a2ffbcb176ba11644211746b27c1d317f265dd4ada
rpcauth=user3:a6c8a511b53b1edcf69c36984985e$13cfba0e626db19061c9d61fa58e712d0319c11db97ad845fa84517f454f6675
rpcwhitelist=user1:getnetworkinfo
rpcwhitelist=user2:getnetworkinfo,getwalletinfo, getbestblockhash
rpcwhitelistdefault=0
```
Now user1 can only call getnetworkinfo, user2 can only call getnetworkinfo or getwalletinfo, while user3 can still call all RPCs.
If any rpcwhitelist is set, act as if all users are subject to whitelists unless rpcwhitelistdefault is set to 0. If rpcwhitelistdefault is set to 1 and no rpcwhitelist is set, act as if all users are subject to whitelists.
Review Request
=====
In addition to normal review, would love specific review from someone working on LN (e.g., @ roasbeef) and someone working on an infrastructure team at an exchange (e.g., @ jimpo) to check that this works well with their system.
Notes
=====
The rpc list is spelling sensitive -- whitespace is stripped though. Spelling errors fail towards the RPC call being blocked, which is safer.
It was unclear to me if HTTPReq_JSONRPC is the best function to patch this functionality into, or if it would be better to place it in exec or somewhere else.
It was also unclear to me if it would be preferred to cache the whitelists on startup or parse them on every RPC as is done with multiUserAuthorized. I opted for the cached approach as I thought it was a bit cleaner.
Future Work
=====
In a future PR, I would like to add an inheritance scheme. This seemed more controversial so I didn't want to include that here. Inheritance semantics are tricky, but it would also make these whitelists easier to read.
It also might be good to add a `getrpcwhitelist` command to facilitate permission discovery.
Tests
=====
Thanks to @ emilengler for adding tests for this feature. The tests cover all cases except for where `rpcwhitelistdefault=1` is used, given difficulties around testing with the current test framework.
ACKs for top commit:
laanwj:
ACK 2081442c421cc4376e5d7839f68fbe7630e89103
Tree-SHA512: 0dc1ac6a6f2f4b0be9c9054d495dd17752fe7b3589aeab2c6ac4e1f91cf4e7e355deedcb5d76d707cbb5a949c2f989c871b74d6bf129351f429569a701adbcbf
b6f9e3576a1ea18572e4803aeb3f39330f0cb759 test: re-enable CLI test support by using EncodeDecimal in json.dumps() (fanquake)
Pull request description:
As mentioned in https://github.com/bitcoin/bitcoin/pull/17675#issuecomment-563188648.
ACKs for top commit:
practicalswift:
ACK b6f9e3576a1ea18572e4803aeb3f39330f0cb759 assuming Travis is happy too -- diff looks correct :)
MarcoFalke:
> ACK b6f9e35 assuming Travis is happy too -- diff looks correct :)
Tree-SHA512: 79fa535cc1756c8ee610a3d6a316a1c4f036797d6990a5620e44985393a2e52f78450f8e0021d0a148c08705fd1ba765508464a365f9030ae0d2cacbd7a93e19
