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Squashed 'src/secp256k1/' changes from 21ffe4b22a9..bdf39000b9c
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bdf39000b9c Merge bitcoin-core/secp256k1#1223: release: prepare for 0.3.0
b40adf23604 release: prepare for 0.3.0
90b513aadad Merge bitcoin-core/secp256k1#1229: cmake: Rename project to "libsecp256k1"
8be82d43628 cmake: Rename project to "libsecp256k1"
ef4f8bd0259 Merge bitcoin-core/secp256k1#1227: readme: Use correct build type in CMake/Windows build instructions
756b61d451d readme: Use correct build type in CMake/Windows build instructions
3295aa149bd Merge bitcoin-core/secp256k1#1225: changelog: Add entry for CMake
92098d84cf7 changelog: Add entry for CMake
df323b5c146 Merge bitcoin-core/secp256k1#1113: build: Add CMake-based build system
e1eb33724c2 ci: Add "x86_64: Windows (VS 2022)" task
10602b0030e cmake: Export config files
5468d709644 build: Add CMake-based build system
6048e6c03e4 Merge bitcoin-core/secp256k1#1222: Remove redundant checks.
eb8749fcd0f Merge bitcoin-core/secp256k1#1221: Update Changelog
5d8f53e3129 Remove redudent checks.
9d1b458d5fb Merge bitcoin-core/secp256k1#1217: Add secp256k1_fe_add_int function
d232112fa7e Update Changelog
8962fc95bb0 Merge bitcoin-core/secp256k1#1218: Update overflow check
2ef1c9b3870 Update overflow check
57573187826 Merge bitcoin-core/secp256k1#1212: Prevent dead-store elimination when clearing secrets in examples
b081f7e4cbf Add secp256k1_fe_add_int function
5660c137552 prevent optimization in algorithms
09b1d466db7 Merge bitcoin-core/secp256k1#979: Native jacobi symbol algorithm
ce3cfc78a60 doc: Describe Jacobi calculation in safegcd_implementation.md
6be01036c8a Add secp256k1_fe_is_square_var function
1de2a01c2b2 Native jacobi symbol algorithm
04c6c1b1816 Make secp256k1_modinv64_det_check_pow2 support abs val
5fffb2c7af5 Make secp256k1_i128_check_pow2 support -(2^n)
cbd25559343 Merge bitcoin-core/secp256k1#1209: build: Add SECP256K1_API_VAR to fix importing variables from DLLs
1b21aa51752 Merge bitcoin-core/secp256k1#1078: group: Save a normalize_to_zero in gej_add_ge
e4330341bd6 ci: Shutdown wineserver whenever CI script exits
9a5a611a21f build: Suppress stupid MSVC linker warning
739c53b19a2 examples: Extend sig examples by call that uses static context
914276e4d27 build: Add SECP256K1_API_VAR to fix importing variables from DLLs
1cca7c1744b Merge bitcoin-core/secp256k1#1206: build: Add -Wreserved-identifier supported by clang
8c7e0fc1de0 build: Add -Wreserved-identifier supported by clang
8ebe5c52050 Merge bitcoin-core/secp256k1#1201: ci: Do not set git's `user.{email,name}` config options
5596ec5c2cf Merge bitcoin-core/secp256k1#1203: Do not link `bench` and `ctime_tests` to `COMMON_LIB`
ef39721ccce Do not link `bench` and `ctime_tests` to `COMMON_LIB`
9b60e3148d8 ci: Do not set git's `user.{email,name}` config options
e1817a6f54f Merge bitcoin-core/secp256k1#1199: ci: Minor improvements inspired by Bitcoin Core
1bff2005885 Merge bitcoin-core/secp256k1#1200: Drop no longer used Autoheader macros
9b7d18669dc Drop no longer used Autoheader macros
c2415866c7a ci: Don't fetch git history
0ecf3188515 ci: Use remote pull/merge ref instead of local git merge
2b77240b3ba Merge bitcoin-core/secp256k1#1172: benchmarks: fix bench_scalar_split
eb6bebaee39 scalar: restrict split_lambda args, improve doc and VERIFY_CHECKs
7f49aa7f2dc ci: add test job with -DVERIFY
620ba3d74be benchmarks: fix bench_scalar_split
5fbff5d348f Merge bitcoin-core/secp256k1#1170: contexts: Forbid destroying, cloning and randomizing the static context
233822d849d Merge bitcoin-core/secp256k1#1195: ctime_tests: improve output when CHECKMEM_RUNNING is not defined
ad7433b1409 Merge bitcoin-core/secp256k1#1196: Drop no longer used variables from the build system
e39d954f118 tests: Add CHECK_ILLEGAL(_VOID) macros and use in static ctx tests
2cd4e3c0a97 Drop no longer used `SECP_{LIBS,INCLUDE}` variables
613626f94c7 Drop no longer used `SECP_TEST_{LIBS,INCLUDE}` variables
61841fc9ee5 contexts: Forbid randomizing secp256k1_context_static
4b6df5e33e1 contexts: Forbid cloning/destroying secp256k1_context_static
b1579cf5fb4 Merge bitcoin-core/secp256k1#1194: Ensure safety of ctz_debruijn implementation.
8f51229e034 ctime_tests: improve output when CHECKMEM_RUNNING is not defined
d6ff738d5bb Ensure safety of ctz_debruijn implementation.
a01a7d86dc2 Merge bitcoin-core/secp256k1#1192: Switch to exhaustive groups with small B coefficient
a7a7bfaf3dc Merge bitcoin-core/secp256k1#1190: Make all non-API functions (except main) static
f29a3270923 Merge bitcoin-core/secp256k1#1169: Add support for msan instead of valgrind (for memcheck and ctime test)
ff8edf89e2e Merge bitcoin-core/secp256k1#1193: Add `noverify_tests` to `.gitignore`
ce60785b265 Introduce SECP256K1_B macro for curve b coefficient
4934aa79958 Switch to exhaustive groups with small B coefficient
d4a6b58df74 Add `noverify_tests` to `.gitignore`
88e80722d2a Merge bitcoin-core/secp256k1#1160: Makefile: add `-I$(top_srcdir)/{include,src}` to `CPPFLAGS` for precomputed
0f088ec1126 Rename CTIMETEST -> CTIMETESTS
74b026f05d5 Add runtime checking for DECLASSIFY flag
5e2e6fcfc0e Run ctime test in Linux MSan CI job
18974061a3f Make ctime tests building configurable
5048be17e93 Rename valgrind_ctime_test -> ctime_tests
6eed6c18ded Update error messages to suggest msan as well
8e11f89a685 Add support for msan integration to checkmem.h
8dc64079eb1 Add compile-time error to valgrind_ctime_test
0db05a770eb Abstract interactions with valgrind behind new checkmem.h
4f1a54e41d8 Move valgrind CPPFLAGS into SECP_CONFIG_DEFINES
cc3b8a4f404 Merge bitcoin-core/secp256k1#1187: refactor: Rename global variables in tests
9a93f48f502 refactor: Rename STTC to STATIC_CTX in tests
3385a2648d7 refactor: Rename global variables to uppercase in tests
e03ef865593 Make all non-API functions (except main) static
cbe41ac138b Merge bitcoin-core/secp256k1#1188: tests: Add noverify_tests which is like tests but without VERIFY
203760023c6 tests: Add noverify_tests which is like tests but without VERIFY
e862c4af0c5 Makefile: add -I$(top_srcdir)/src to CPPFLAGS for precomputed
0eb3000417f Merge bitcoin-core/secp256k1#1186: tests: Tidy context tests
39e8f0e3d7b refactor: Separate run_context_tests into static vs proper contexts
a4a09379b1a tests: Clean up and improve run_context_tests() further
fc90bb56956 refactor: Tidy up main()
f32a36f620e tests: Don't use global context for context tests
ce4f936c4fa tests: Tidy run_context_tests() by extracting functions
18e0db30cb4 tests: Don't recreate global context in scratch space test
b19806122e9 tests: Use global copy of secp256k1_context_static instead of clone
2a39ac162e0 Merge bitcoin-core/secp256k1#1185: Drop `SECP_CONFIG_DEFINES` from examples
2f9ca284e2a Drop `SECP_CONFIG_DEFINES` from examples
31ed5386e84 Merge bitcoin-core/secp256k1#1183: Bugfix: pass SECP_CONFIG_DEFINES to bench compilation
c0a555b2ae3 Bugfix: pass SECP_CONFIG_DEFINES to bench compilation
01b819a8c7d Merge bitcoin-core/secp256k1#1158: Add a secp256k1_i128_to_u64 function.
eacad90f699 Merge bitcoin-core/secp256k1#1171: Change ARG_CHECK_NO_RETURN to ARG_CHECK_VOID which returns (void)
3f57b9f7749 Merge bitcoin-core/secp256k1#1177: Some improvements to the changelog
c30b889f17e Clarify that the ABI-incompatible versions are earlier
881fc33d0c1 Consistency in naming of modules
665ba77e793 Merge bitcoin-core/secp256k1#1178: Drop `src/libsecp256k1-config.h`
75d7b7f5bae Merge bitcoin-core/secp256k1#1154: ci: set -u in cirrus.sh to treat unset variables as an error
7a746882013 ci: add missing CFLAGS & CPPFLAGS variable to print_environment
c2e0fdadebd ci: set -u in cirrus.sh to treat unset variables as an error
9c5a4d21bbe Do not define unused `HAVE_VALGRIND` macro
ad8647f548c Drop no longer relevant files from `.gitignore`
b627ba7050b Remove dependency on `src/libsecp256k1-config.h`
9ecf8149a19 Reduce font size in changelog
2dc133a67ff Add more changelog entries
ac233e181a5 Add links to diffs to changelog
cee8223ef6d Mention semantic versioning in changelog
9a8d65f07f1 Merge bitcoin-core/secp256k1#1174: release cleanup: bump version after 0.2.0
02ebc290f74 release cleanup: bump version after 0.2.0
b6b360efafc doc: improve message of cleanup commit
a49e0940ad6 docs: Fix typo
2551cdac903 tests: Fix code formatting
c635c1bfd54 Change ARG_CHECK_NO_RETURN to ARG_CHECK_VOID which returns (void)
cf66f2357c6 refactor: Add helper function secp256k1_context_is_proper()
d2164752053 test secp256k1_i128_to_i64
4bc429019dc Add a secp256k1_i128_to_u64 function.
e089eecc1e5 group: Further simply gej_add_ge
ac71020ebe0 group: Save a normalize_to_zero in gej_add_ge

git-subtree-dir: src/secp256k1
git-subtree-split: bdf39000b9c6a0818e7149ccb500873d079e6e85
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sipa authored and janus committed Sep 1, 2023
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358 changes: 209 additions & 149 deletions .cirrus.yml

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128 changes: 5 additions & 123 deletions .gitignore
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bench
bench_ecmult
bench_internal
noverify_tests
tests
exhaustive_tests
precompute_ecmult_gen
precompute_ecmult
valgrind_ctime_test
ctime_tests
ecdh_example
ecdsa_example
schnorr_example
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*.gcno
*.gcov

src/libsecp256k1-config.h
src/libsecp256k1-config.h.in
build-aux/ar-lib
build-aux/config.guess
build-aux/config.sub
Expand All @@ -58,124 +57,7 @@ build-aux/m4/ltversion.m4
build-aux/missing
build-aux/compile
build-aux/test-driver
config.cache
config.log
config.status
configure
libtool
src/config/BGL-config.h
src/config/BGL-config.h.in
src/config/stamp-h1
src/obj
share/setup.nsi
share/qt/Info.plist

src/qt/*.moc
src/qt/moc_*.cpp
src/qt/forms/ui_*.h

src/qt/test/moc*.cpp

src/qt/BGL-qt.config
src/qt/BGL-qt.creator
src/qt/BGL-qt.creator.user
src/qt/BGL-qt.files
src/qt/BGL-qt.includes

.deps
.dirstamp
.libs
.*.swp
*~
*.bak
*.rej
*.orig
*.pyc
*.o
*.o-*
*.a
*.pb.cc
*.pb.h
*.dat

*.log
*.trs
*.dmg

*.json.h
*.raw.h

# Only ignore unexpected patches
*.patch
!contrib/guix/patches/*.patch
!depends/patches/**/*.patch

#libtool object files
*.lo
*.la

# Compilation and Qt preprocessor part
*.qm
Makefile
!depends/Makefile
src/qt/BGL-qt
BGL-Qt.app

# Qt Creator
Makefile.am.user

# Unit-tests
Makefile.test
BGL-qt_test

# Resources cpp
qrc_*.cpp

# Mac specific
.DS_Store
build

# Previous releases
releases

#lcov
*.gcno
*.gcda
/*.info
test_BGL.coverage/
total.coverage/
fuzz.coverage/
coverage_percent.txt
/cov_tool_wrapper.sh
qa-assets/

#build tests
linux-coverage-build
linux-build
win32-build
test/config.ini
test/cache/*
test/.mypy_cache/

!src/leveldb*/Makefile

/doc/doxygen/

libBGLconsensus.pc
contrib/devtools/split-debug.sh

# Output from running db4 installation
db4/

# clang-check
*.plist

osx_volname
dist/

.gdb_history

.vscode/
/guix-build-*
libsecp256k1.pc

/ci/scratch/
# Default CMake build directory.
/build
61 changes: 61 additions & 0 deletions CHANGELOG.md
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# Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [Unreleased]

## [0.3.0] - 2023-03-08

#### Added
- Added experimental support for CMake builds. Traditional GNU Autotools builds (`./configure` and `make`) remain fully supported.
- Usage examples: Added a recommended method for securely clearing sensitive data, e.g., secret keys, from memory.
- Tests: Added a new test binary `noverify_tests`. This binary runs the tests without some additional checks present in the ordinary `tests` binary and is thereby closer to production binaries. The `noverify_tests` binary is automatically run as part of the `make check` target.

#### Fixed
- Fixed declarations of API variables for MSVC (`__declspec(dllimport)`). This fixes MSVC builds of programs which link against a libsecp256k1 DLL dynamically and use API variables (and not only API functions). Unfortunately, the MSVC linker now will emit warning `LNK4217` when trying to link against libsecp256k1 statically. Pass `/ignore:4217` to the linker to suppress this warning.

#### Changed
- Forbade cloning or destroying `secp256k1_context_static`. Create a new context instead of cloning the static context. (If this change breaks your code, your code is probably wrong.)
- Forbade randomizing (copies of) `secp256k1_context_static`. Randomizing a copy of `secp256k1_context_static` did not have any effect and did not provide defense-in-depth protection against side-channel attacks. Create a new context if you want to benefit from randomization.

#### Removed
- Removed the configuration header `src/libsecp256k1-config.h`. We recommend passing flags to `./configure` or `cmake` to set configuration options (see `./configure --help` or `cmake -LH`). If you cannot or do not want to use one of the supported build systems, pass configuration flags such as `-DSECP256K1_ENABLE_MODULE_SCHNORRSIG` manually to the compiler (see the file `configure.ac` for supported flags).

#### ABI Compatibility

Due to changes in the API regarding `secp256k1_context_static` described above, the ABI is *not* compatible with previous versions.

## [0.2.0] - 2022-12-12

#### Added
- Added usage examples for common use cases in a new `examples/` directory.
- Added `secp256k1_selftest`, to be used in conjunction with `secp256k1_context_static`.
- Added support for 128-bit wide multiplication on MSVC for x86_64 and arm64, giving roughly a 20% speedup on those platforms.

#### Changed
- Enabled modules `schnorrsig`, `extrakeys` and `ecdh` by default in `./configure`.
- The `secp256k1_nonce_function_rfc6979` nonce function, used by default by `secp256k1_ecdsa_sign`, now reduces the message hash modulo the group order to match the specification. This only affects improper use of ECDSA signing API.

#### Deprecated
- Deprecated context flags `SECP256K1_CONTEXT_VERIFY` and `SECP256K1_CONTEXT_SIGN`. Use `SECP256K1_CONTEXT_NONE` instead.
- Renamed `secp256k1_context_no_precomp` to `secp256k1_context_static`.
- Module `schnorrsig`: renamed `secp256k1_schnorrsig_sign` to `secp256k1_schnorrsig_sign32`.

#### ABI Compatibility

Since this is the first release, we do not compare application binary interfaces.
However, there are earlier unreleased versions of libsecp256k1 that are *not* ABI compatible with this version.

## [0.1.0] - 2013-03-05 to 2021-12-25

This version was in fact never released.
The number was given by the build system since the introduction of autotools in Jan 2014 (ea0fe5a5bf0c04f9cc955b2966b614f5f378c6f6).
Therefore, this version number does not uniquely identify a set of source files.

[unreleased]: https://github.com/bitcoin-core/secp256k1/compare/v0.3.0...HEAD
[0.3.0]: https://github.com/bitcoin-core/secp256k1/compare/v0.2.0...v0.3.0
[0.2.0]: https://github.com/bitcoin-core/secp256k1/compare/423b6d19d373f1224fd671a982584d7e7900bc93..v0.2.0
[0.1.0]: https://github.com/bitcoin-core/secp256k1/commit/423b6d19d373f1224fd671a982584d7e7900bc93
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