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bitcoin/CHANGELOG.md
Pieter Wuille 901336eee7 Squashed 'src/secp256k1/' changes from 4258c54f4e..705ce7ed8c 
705ce7ed8c Merge bitcoin-core/secp256k1#1129: ElligatorSwift + integrated x-only DH
0702ecb061 Merge bitcoin-core/secp256k1#1338: Drop no longer needed `#include "../include/secp256k1.h"`
90e360acc2 Add doc/ellswift.md with ElligatorSwift explanation
4f091847c2 Add ellswift testing to CI
1bcea8c57f Add benchmarks for ellswift module
2d1d41acf8 Add ctime tests for ellswift module
df633cdeba Add _prefix and _bip324 ellswift_xdh hash functions
9695deb351 Add tests for ellswift module
c47917bbd6 Add ellswift module implementing ElligatorSwift
79e5b2a8b8 Add functions to test if X coordinate is valid
a597a5a9ce Add benchmark for key generation
30574f22ea Merge bitcoin-core/secp256k1#1349: Normalize ge produced from secp256k1_pubkey_load
45c5ca7675 Merge bitcoin-core/secp256k1#1350: scalar: introduce and use `secp256k1_{read,write}_be64` helpers
f1652528be Normalize ge produced from secp256k1_pubkey_load
7067ee54b4 tests: add tests for `secp256k1_{read,write}_be64`
740528caad scalar: use newly introduced `secp256k1_{read,write}_be64` helpers (4x64 impl.)
67214f5f7d Merge bitcoin-core/secp256k1#1339: scalar: refactor: use `secp256k1_{read,write}_be32` helpers
cb1a59275c Merge bitcoin-core/secp256k1#1341: docs: correct `pubkey` param descriptions for `secp256k1_keypair_{xonly_,}pub`
f3644287b1 docs: correct `pubkey` param descriptions for `secp256k1_keypair_{xonly_,}pub`
887183e7de scalar: use `secp256k1_{read,write}_be32` helpers (4x64 impl.)
52b84238de scalar: use `secp256k1_{read,write}_be32` helpers (8x32 impl.)
e449af6872 Drop no longer needed `#include "../include/secp256k1.h"`
60556c9f49 Merge bitcoin-core/secp256k1#1337: ci: Fix error D8037 in `cl.exe` (attempt 2)
db29bf220c ci: Remove quirk that runs dummy command after wineserver
c7db4942b3 ci: Fix error D8037 in `cl.exe`
7dae115861 Revert "ci: Move wine prefix to /tmp to avoid error D8037 in cl.exe"
bf29f8d0a6 Merge bitcoin-core/secp256k1#1334: fix input range comment for `secp256k1_fe_add_int`
605e07e365 fix input range comment for `secp256k1_fe_add_int`
debf3e5c08 Merge bitcoin-core/secp256k1#1330: refactor: take use of `secp256k1_scalar_{zero,one}` constants
d75dc59b58 Merge bitcoin-core/secp256k1#1333: test: Warn if both `VERIFY` and `COVERAGE` are defined
ade5b36701 tests: add checks for scalar constants `secp256k1_scalar_{zero,one}`
e83801f5db test: Warn if both `VERIFY` and `COVERAGE` are defined
654246c635 refactor: take use of `secp256k1_scalar_{zero,one}` constants
908e02d596 Merge bitcoin-core/secp256k1#1328: build: Bump MSVC warning level up to W3
1549db0ca5 build: Level up MSVC warnings
20a5da5fb1 Merge bitcoin-core/secp256k1#1310: Refine release process
ad84603297 release process: clarify change log updates
6348bc7eee release process: fix process for maintenance release
79fa50b082 release process: mention targeted release schedule
165206789b release process: add sanity checks
09df0bfb23 Merge bitcoin-core/secp256k1#1327: ci: Move wine prefix to /tmp to avoid error D8037 in cl.exe
27504d5c94 ci: Move wine prefix to /tmp to avoid error D8037 in cl.exe
d373a7215b Merge bitcoin-core/secp256k1#1316: Do not invoke fe_is_zero on failed set_b32_limit
6433175ffe Do not invoke fe_is_zero on failed set_b32_limit
5f7903c73c Merge bitcoin-core/secp256k1#1318: build: Enable -DVERIFY for precomputation binaries
e9e4526a4e Merge bitcoin-core/secp256k1#1317: Make fe_cmov take max of magnitudes
5768b50229 build: Enable -DVERIFY for precomputation binaries
31b4bbee1e Make fe_cmov take max of magnitudes
83186db34a Merge bitcoin-core/secp256k1#1314: release cleanup: bump version after 0.3.2
95448ef2f8 release cleanup: bump version after 0.3.2
acf5c55ae6 Merge bitcoin-core/secp256k1#1312: release: Prepare for 0.3.2
d490ca2046 release: Prepare for 0.3.2
3e3d125b83 Merge bitcoin-core/secp256k1#1309: changelog: Catch up
e8295d07ab Merge bitcoin-core/secp256k1#1311: Revert "Remove unused scratch space from API"
697e1ccf4a changelog: Catch up
3ad1027a40 Revert "Remove unused scratch space from API"
76b43f3443 changelog: Add entry for #1303
7d4f86d242 Merge bitcoin-core/secp256k1#1307: Mark more assembly outputs as early clobber
b54a0672ef Merge bitcoin-core/secp256k1#1304: build: Rename arm to arm32 and check if it's really supported
c6bb29b303 build: Rename `64bit` to `x86_64`
8c9ae37a5a Add release note
03246457a8 autotools: Add `SECP_ARM32_ASM_CHECK` macro
ed4ba238e2 cmake: Add `check_arm32_assembly` function
350b4bd6e6 Mark stack variables as early clobber for technical correctness
0c729ba70d Bugfix: mark outputs as early clobber in scalar x86_64 asm
3353d3c753 Merge bitcoin-core/secp256k1#1207: Split fe_set_b32 into reducing and normalizing variants
5b32602295 Split fe_set_b32 into reducing and normalizing variants
006ddc1f42 Merge bitcoin-core/secp256k1#1306: build: Make tests work with external default callbacks
1907f0f166 build: Make tests work with external default callbacks
fb3a806365 Merge bitcoin-core/secp256k1#1133: schnorrsig: Add test vectors for variable-length messages
cd54ac7c1c schnorrsig: Improve docs of schnorrsig_sign_custom
28687b0312 schnorrsig: Add BIP340 varlen test vectors
97a98bed1e schnorrsig: Refactor test vector code to allow varlen messages
ab5a917128 Merge bitcoin-core/secp256k1#1303: ct: Use more volatile
9eb6934f69 Merge bitcoin-core/secp256k1#1305: Remove unused scratch space from API
073d98a076 Merge bitcoin-core/secp256k1#1292: refactor: Make 64-bit shift explicit
17fa21733a ct: Be cautious and use volatile trick in more "conditional" paths
5fb336f9ce ct: Use volatile trick in scalar_cond_negate
712e7f8722 Remove unused scratch space from API
54d34b6c24 Merge bitcoin-core/secp256k1#1300: Avoid normalize conditional on VERIFY
c63ec88ebf Merge bitcoin-core/secp256k1#1066: Abstract out and merge all the magnitude/normalized logic
7fc642fa25 Simplify secp256k1_fe_{impl_,}verify
4e176ad5b9 Abstract out verify logic for fe_is_square_var
4371f98346 Abstract out verify logic for fe_add_int
89e324c6b9 Abstract out verify logic for fe_half
283cd80ab4 Abstract out verify logic for fe_get_bounds
d5aa2f0358 Abstract out verify logic for fe_inv{,_var}
3167646072 Abstract out verify logic for fe_from_storage
76d31e5047 Abstract out verify logic for fe_to_storage
1e6894bdd7 Abstract out verify logic for fe_cmov
be82bd8e03 Improve comments/checks for fe_sqrt
6ab35082ef Abstract out verify logic for fe_sqr
4c25f6efbd Abstract out verify logic for fe_mul
e179e651cb Abstract out verify logic for fe_add
7e7ad7ff57 Abstract out verify logic for fe_mul_int
65d82a3445 Abstract out verify logic for fe_negate
144670893e Abstract out verify logic for fe_get_b32
f7a7666aeb Abstract out verify logic for fe_set_b32
ce4d2093e8 Abstract out verify logic for fe_cmp_var
7d7d43c6dd Improve comments/check for fe_equal{,_var}
c5e788d672 Abstract out verify logic for fe_is_odd
d3f3fe8616 Abstract out verify logic for fe_is_zero
c701d9a471 Abstract out verify logic for fe_clear
19a2bfeeea Abstract out verify logic for fe_set_int
864f9db491 Abstract out verify logic for fe_normalizes_to_zero{,_var}
6c31371120 Abstract out verify logic for fe_normalize_var
e28b51f522 Abstract out verify logic for fe_normalize_weak
b6b6f9cb97 Abstract out verify logic for fe_normalize
7fa5195559 Bugfix: correct SECP256K1_FE_CONST mag/norm fields
e5cf4bf3ff build: Rename `arm` to `arm32`
b29566c51b Merge magnitude/normalized fields, move/improve comments
97c63b9039 Avoid normalize conditional on VERIFY
341cc19726 Merge bitcoin-core/secp256k1#1299: Infinity handling: ecmult_const(infinity) works, and group verification
bbc834467c Avoid secp256k1_ge_set_gej_zinv with uninitialized z
0a2e0b2ae4 Make secp256k1_{fe,ge,gej}_verify work as no-op if non-VERIFY
f20266722a Add invariant checking to group elements
a18821d5b1 Always initialize output coordinates in secp256k1_ge_set_gej
3086cb90ac Expose secp256k1_fe_verify to other modules
a0e696fd4d Make secp256k1_ecmult_const handle infinity
24c768ae09 Merge bitcoin-core/secp256k1#1301: Avoid using bench_verify_data as bench_sign_data; merge them
2e65f1fdbc Avoid using bench_verify_data as bench_sign_data; merge them
1cf15ebd94 Merge bitcoin-core/secp256k1#1296: docs: complete interface description for `secp256k1_schnorrsig_sign_custom`
149c41cee1 docs: complete interface description for `secp256k1_schnorrsig_sign_custom`
f30c74866b Merge bitcoin-core/secp256k1#1270: cmake: Fix library ABI versioning
d1e48e5474 refactor: Make 64-bit shift explicit
b2e29e43d0 ci: Treat all compiler warnings as errors in "Windows (VS 2022)" task
3c81838856 Merge bitcoin-core/secp256k1#1289: cmake: Use full signature of `add_test()` command
755629bc03 cmake: Use full signature of `add_test()` command
bef448f9af cmake: Fix library ABI versioning
4b0f711d46 Merge bitcoin-core/secp256k1#1277: autotools: Clean up after adding Wycheproof
222ecaf661 Merge bitcoin-core/secp256k1#1284: cmake: Some improvements using `PROJECT_IS_TOP_LEVEL` variable
71f746c057 cmake: Include `include` directory for subtree builds
024a409484 Merge bitcoin-core/secp256k1#1240: cmake: Improve and document compiler flag checks
a8d059f76c cmake, doc: Document compiler flags
6ece1507cb cmake, refactor: Rename `try_add_compile_option` to `try_append_cflags`
19516ed3e9 cmake: Use `add_compile_options()` in `try_add_compile_option()`
4b84f4bf0f Merge bitcoin-core/secp256k1#1239: cmake: Bugfix and other improvements after bumping CMake up to 3.13
596b336ff6 Merge bitcoin-core/secp256k1#1234: cmake: Add dev-mode
6b7e5b717d Merge bitcoin-core/secp256k1#1275: build: Fix C4005 "macro redefinition" MSVC warnings in examples
1c89536718 Merge bitcoin-core/secp256k1#1286: tests: remove extra semicolon in macro
c4062d6b5d debug: move helper for printing buffers into util.h
7e977b3c50 autotools: Take VPATH builds into account when generating testvectors
2418d3260a autotools: Create src/wycheproof dir before creating file in it
8764034ed5 autotools: Make all "pregenerated" targets .PHONY
e1b9ce8811 autotools: Use same conventions for all pregenerated files
3858bad2c6 tests: remove extra semicolon in macro
1f33bb2b1c Merge bitcoin-core/secp256k1#1205: field: Improve docs +tests of secp256k1_fe_set_b32
162da73e9a tests: Add debug helper for printing buffers
e9fd3dff76 field: Improve docs and tests of secp256k1_fe_set_b32
f6bef03c0a Merge bitcoin-core/secp256k1#1283: Get rid of secp256k1_fe_const_b
5431b9decd cmake: Make `SECP256K1_INSTALL` default depend on `PROJECT_IS_TOP_LEVEL`
5ec1333d4f Merge bitcoin-core/secp256k1#1285: bench: Make sys/time.h a system include
68b16a1662 bench: Make sys/time.h a system include
162608cc98 cmake: Emulate `PROJECT_IS_TOP_LEVEL` for CMake<3.21
69e1ec0331 Get rid of secp256k1_fe_const_b
ce5ba9e24d gitignore: Add CMakeUserPresets.json
0a446a312f cmake: Add dev-mode CMake preset
a6f4bcf6e1 Merge bitcoin-core/secp256k1#1231: Move `SECP256K1_INLINE` macro definition out from `include/secp256k1.h`
a273d74b2e cmake: Improve version comparison
6a58b483ef cmake: Use `if(... IN_LIST ...)` command
2445808c02 cmake: Use dedicated `GENERATOR_IS_MULTI_CONFIG` property
9f8703ef17 cmake: Use dedicated `CMAKE_HOST_APPLE` variable
8c2017035a cmake: Use recommended `add_compile_definitions` command
04d4cc071a cmake: Add `DESCRIPTION` and `HOMEPAGE_URL` options to `project` command
8a8b6536ef cmake: Use `SameMinorVersion` compatibility mode
5b0444a3b5 Merge bitcoin-core/secp256k1#1263: cmake: Make installation optional
47ac3d63cd cmake: Make installation optional
2e035af251 Merge bitcoin-core/secp256k1#1273: build: Make `SECP_VALGRIND_CHECK` preserve `CPPFLAGS`
5be353d658 Merge bitcoin-core/secp256k1#1279: tests: lint wycheproof's python script
08f4b1632d autotools: Move code around to tidy Makefile
04bf3f6778 Merge bitcoin-core/secp256k1#1230: Build: allow static or shared but not both
9ce9984f32 Merge bitcoin-core/secp256k1#1265: Remove bits argument from secp256k1_wnaf_const{_xonly}
566faa17d3 Merge bitcoin-core/secp256k1#1267: doc: clarify process for patch releases
ef49a11d29 build: allow static or shared but not both
35ada3b954 tests: lint wycheproof's python script
529b54d922 autotools: Move Wycheproof header from EXTRA_DIST to noinst_HEADERS
dc0657c762 build: Fix C4005 "macro redefinition" MSVC warnings in examples
1ecb94ebe9 build: Make `SECP_VALGRIND_CHECK` preserve `CPPFLAGS`
1b6fb5593c doc: clarify process for patch releases
a575339c02 Remove bits argument from secp256k1_wnaf_const (always 256)
36b0adf1b9 build: remove warning until it's reproducible
8e142ca410 Move `SECP256K1_INLINE` macro definition out from `include/secp256k1.h`
77445898a5 Remove `SECP256K1_INLINE` usage from examples
ca92a35d01 field: Simplify code in secp256k1_fe_set_b32
d93f62e369 field: Verify field element even after secp256k1_fe_set_b32 fails

git-subtree-dir: src/secp256k1
git-subtree-split: 705ce7ed8c1557a31e1bfc99be06082c5098d9f5
2023-06-21 11:04:00 -04:00

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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]
## [0.3.2] - 2023-05-13
We strongly recommend updating to 0.3.2 if you use or plan to use GCC >=13 to compile libsecp256k1. When in doubt, check the GCC version using `gcc -v`.
#### Security
- Module `ecdh`: Fix "constant-timeness" issue with GCC 13.1 (and potentially future versions of GCC) that could leave applications using libsecp256k1's ECDH module vulnerable to a timing side-channel attack. The fix avoids secret-dependent control flow during ECDH computations when libsecp256k1 is compiled with GCC 13.1.
#### Fixed
- Fixed an old bug that permitted compilers to potentially output bad assembly code on x86_64. In theory, it could lead to a crash or a read of unrelated memory, but this has never been observed on any compilers so far.
#### Changed
- Various improvements and changes to CMake builds. CMake builds remain experimental.
- Made API versioning consistent with GNU Autotools builds.
- Switched to `BUILD_SHARED_LIBS` variable for controlling whether to build a static or a shared library.
- Added `SECP256K1_INSTALL` variable for the controlling whether to install the build artefacts.
- Renamed asm build option `arm` to `arm32`. Use `--with-asm=arm32` instead of `--with-asm=arm` (GNU Autotools), and `-DSECP256K1_ASM=arm32` instead of `-DSECP256K1_ASM=arm` (CMake).
#### ABI Compatibility
The ABI is compatible with versions 0.3.0 and 0.3.1.
## [0.3.1] - 2023-04-10
We strongly recommend updating to 0.3.1 if you use or plan to use Clang >=14 to compile libsecp256k1, e.g., Xcode >=14 on macOS has Clang >=14. When in doubt, check the Clang version using `clang -v`.
#### Security
- Fix "constant-timeness" issue with Clang >=14 that could leave applications using libsecp256k1 vulnerable to a timing side-channel attack. The fix avoids secret-dependent control flow and secret-dependent memory accesses in conditional moves of memory objects when libsecp256k1 is compiled with Clang >=14.
#### Added
- Added tests against [Project Wycheproof's](https://github.com/google/wycheproof/) set of ECDSA test vectors (Bitcoin "low-S" variant), a fixed set of test cases designed to trigger various edge cases.
#### Changed
- Increased minimum required CMake version to 3.13. CMake builds remain experimental.
#### ABI Compatibility
The ABI is compatible with version 0.3.0.
## [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/v0.3.2...HEAD
[0.3.2]: https://github.com/bitcoin-core/secp256k1/compare/v0.3.1...v0.3.2
[0.3.1]: https://github.com/bitcoin-core/secp256k1/compare/v0.3.0...v0.3.1
[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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