5d8f53e312 Remove redudent checks. (Russell O'Connor)
d232112fa7 Update Changelog (Tim Ruffing)
b081f7e4cb Add secp256k1_fe_add_int function (Pieter Wuille)
2ef1c9b387 Update overflow check (Russell O'Connor)
5660c13755 prevent optimization in algorithms (Harshil Jani)
ce3cfc78a6 doc: Describe Jacobi calculation in safegcd_implementation.md (Elliott Jin)
6be01036c8 Add secp256k1_fe_is_square_var function (Pieter Wuille)
1de2a01c2b Native jacobi symbol algorithm (Pieter Wuille)
04c6c1b181 Make secp256k1_modinv64_det_check_pow2 support abs val (Pieter Wuille)
5fffb2c7af Make secp256k1_i128_check_pow2 support -(2^n) (Pieter Wuille)
e4330341bd ci: Shutdown wineserver whenever CI script exits (Tim Ruffing)
9a5a611a21 build: Suppress stupid MSVC linker warning (Tim Ruffing)
739c53b19a examples: Extend sig examples by call that uses static context (Tim Ruffing)
914276e4d2 build: Add SECP256K1_API_VAR to fix importing variables from DLLs (Tim Ruffing)
e089eecc1e group: Further simply gej_add_ge (Tim Ruffing)
ac71020ebe group: Save a normalize_to_zero in gej_add_ge (Tim Ruffing)
8c7e0fc1de build: Add -Wreserved-identifier supported by clang (Tim Ruffing)
9b60e3148d ci: Do not set git's `user.{email,name}` config options (Hennadii Stepanov)
ef39721ccc Do not link `bench` and `ctime_tests` to `COMMON_LIB` (Hennadii Stepanov)
c2415866c7 ci: Don't fetch git history (Tim Ruffing)
0ecf318851 ci: Use remote pull/merge ref instead of local git merge (Tim Ruffing)
9b7d18669d Drop no longer used Autoheader macros (Hennadii Stepanov)
eb6bebaee3 scalar: restrict split_lambda args, improve doc and VERIFY_CHECKs (Jonas Nick)
7f49aa7f2d ci: add test job with -DVERIFY (Jonas Nick)
620ba3d74b benchmarks: fix bench_scalar_split (Jonas Nick)
e39d954f11 tests: Add CHECK_ILLEGAL(_VOID) macros and use in static ctx tests (Tim Ruffing)
61841fc9ee contexts: Forbid randomizing secp256k1_context_static (Tim Ruffing)
4b6df5e33e contexts: Forbid cloning/destroying secp256k1_context_static (Tim Ruffing)
8f51229e03 ctime_tests: improve output when CHECKMEM_RUNNING is not defined (Jonas Nick)
2cd4e3c0a9 Drop no longer used `SECP_{LIBS,INCLUDE}` variables (Hennadii Stepanov)
613626f94c Drop no longer used `SECP_TEST_{LIBS,INCLUDE}` variables (Hennadii Stepanov)
d6ff738d5b Ensure safety of ctz_debruijn implementation. (Russell O'Connor)
ce60785b26 Introduce SECP256K1_B macro for curve b coefficient (Pieter Wuille)
4934aa7995 Switch to exhaustive groups with small B coefficient (Pieter Wuille)
e03ef86559 Make all non-API functions (except main) static (Pieter Wuille)
0f088ec112 Rename CTIMETEST -> CTIMETESTS (Pieter Wuille)
74b026f05d Add runtime checking for DECLASSIFY flag (Pieter Wuille)
5e2e6fcfc0 Run ctime test in Linux MSan CI job (Pieter Wuille)
18974061a3 Make ctime tests building configurable (Pieter Wuille)
5048be17e9 Rename valgrind_ctime_test -> ctime_tests (Pieter Wuille)
6eed6c18de Update error messages to suggest msan as well (Pieter Wuille)
8e11f89a68 Add support for msan integration to checkmem.h (Pieter Wuille)
8dc64079eb Add compile-time error to valgrind_ctime_test (Pieter Wuille)
0db05a770e Abstract interactions with valgrind behind new checkmem.h (Pieter Wuille)
4f1a54e41d Move valgrind CPPFLAGS into SECP_CONFIG_DEFINES (Pieter Wuille)
d4a6b58df7 Add `noverify_tests` to `.gitignore` (Hennadii Stepanov)
e862c4af0c Makefile: add -I$(top_srcdir)/src to CPPFLAGS for precomputed (Matt Whitlock)
Pull request description:
ACKs for top commit:
real-or-random:
tACK 0d540ec942
Tree-SHA512: bc54ccf752163ab6e1a12bb8c4e1f9339f4421d2e4f7716c408549514b3c902f2e9f727655799f1eecb085b0026761b04735b17be3c95c6cf54e07fbf7e86477
9b6a1c384d sync-upstream.sh: Fix position of "-b" option in reproduce command (Tim Ruffing)
Pull request description:
ACKs for top commit:
jonasnick:
utACK 9b6a1c384d
Tree-SHA512: 27e4a41bc9c8f10715623f669c97a511520753b23d24ae91d6d2144e54588da0769f97b1de78c87b7471b39e556b682b1c2910b2bf71f124fb77cbc9e446d5f8
05b207e969 sync-upstream: allows providing the local branch via cli (Jonas Nick)
Pull request description:
ACKs for top commit:
real-or-random:
ACK 05b207e969
Tree-SHA512: b02f3fdf6565943cea2b93a0b2b0a38c30bb3c94873d0c4ed2ad276c75f3dc610911d1c9c076c8b7fd3a5baf83aa1ab66ec86415333cf58fe8f07c64fa74656f
c862a9fb49 ci: Adjust Docker image to Debian 12 "bookworm" (Hennadii Stepanov)
a1782098a9 ci: Force DWARF v4 for Clang when Valgrind tests are expected (Hennadii Stepanov)
8a7273465b Help the compiler prove that a loop is entered (Tim Ruffing)
Pull request description:
Since the [release](https://www.debian.org/News/2023/20230610.html) of Debian 12 "bookworm", it has become the "stable" one that our `ci/linux-debian.Dockerfile` relies on.
Last time the Docker image was built basing on Debian Bullseye.
Changes in packages are significant, for instance:
- `gcc` 10.2. --> 12.2
- `clang` 11.0 --> 14.0
- `wine` 5.0 --> 8.0
which requires certain adjustments provided in this PR.
The first commit has been cherry-picked from https://github.com/bitcoin-core/secp256k1/pull/1313.
ACKs for top commit:
sipa:
utACK c862a9fb49
real-or-random:
ACK c862a9fb49
Tree-SHA512: 2a62a8865f904a460274f1f3ec02d2b0b72c84b25722a383c6455cfe672c1d93382941a5027e8dceb2c0f5fe0f0efd49a0ed6b72303982f9e32991f1535538eb
67887ae65c Fix a typo in the error message (Hennadii Stepanov)
Pull request description:
The code has been copy-pasted from the `precompute_ecmult_gen.c` source file.
ACKs for top commit:
real-or-random:
ACK 67887ae65c
Tree-SHA512: d6874949310197e5d2d6c43f5a7c2165b4ee0f6cbe3cc1491d0f97163fa5329ebeab2b2adf10246c87382016fbe738c69dfd3f2253e93c906bf404cbf439b12a
7c7467ab7f Refer to ellswift.md in API docs (Pieter Wuille)
c32ffd8d8c Add ellswift to CHANGELOG (Pieter Wuille)
Pull request description:
A follow-up with a CHANGELOG entry for #1129.
ACKs for top commit:
real-or-random:
ACK 7c7467ab7f
theStack:
ACK 7c7467ab7f
Tree-SHA512: 4f066e4b8d5e130f2b5bea0ed4c634e9426bc576342aad6c306e0805a8354e27a5e679b15ec869d4e7d36eb5d53174e46b3bf5e15d19a7e165afc82e46ddfcf5
bc7c8db179 abi: Use dllexport for mingw builds (Cory Fields)
Pull request description:
Addresses the first part of #1181. See the discussion there for more context and history.
After this, all that remains is a (platform-independent) exports checker for c-i. Or perhaps a linker script or .def file could be tricked into testing as a side-effect.
This should fix mingw exports, specifically hiding the following:
`secp256k1_pre_g_128`
`secp256k1_pre_g`
`secp256k1_ecmult_gen_prec_table`
This changes our visibility macros to look more like [gcc's recommendation](https://gcc.gnu.org/wiki/Visibility#How_to_use_the_new_C.2B-.2B-_visibility_support).
Edit:
Note that we could further complicate this by supporting `__attribute__ ((dllexport))` as well, though I didn't bother as I'm not sure what compiler combo would accept that but not the bare dllexport syntax.
Edit2:
As the title implies, this affects this ABI and could affect downstream libs/apps in unintended ways (though it's hard to imagine any real downside). Though because it's win32 only, I'm imagining very little real-world impact at all.
ACKs for top commit:
hebasto:
re-ACK bc7c8db179, only a comment has been adjusted since my recent [review](https://github.com/bitcoin-core/secp256k1/pull/1295#pullrequestreview-1414928537),
real-or-random:
utACK bc7c8db179
Tree-SHA512: 378e15556da49494f551bdf4f7b41304db9d03a435f21fcc947c9520aa43e3c655cfe216fba57a5179a871c975c806460eef7c33b105f2726e1de0937ff2444e
5b7bf2e9d4 Use `__shiftright128` intrinsic in `secp256k1_u128_rshift` on MSVC (Hennadii Stepanov)
Pull request description:
Closes https://github.com/bitcoin-core/secp256k1/issues/1324.
As the `__shiftright128` [docs](https://learn.microsoft.com/en-us/cpp/intrinsics/shiftright128) state:
> The `Shift` value is always modulo 64...
it is not applicable for the `n >= 64` branch.
ACKs for top commit:
sipa:
utACK 5b7bf2e9d4
real-or-random:
ACK 5b7bf2e9d4 tested with MSVC x64
Tree-SHA512: bc4c245a9da83c783a0479e751a4bc2ec77a34b99189fcc4431033a5420c93b610f3b960d3f23c15bce2eb010beba665b3e84d468b3fdab3d5846d4f27016898
e449af6872 Drop no longer needed `#include "../include/secp256k1.h"` (Hennadii Stepanov)
Pull request description:
The removed header includes have not been needed since https://github.com/bitcoin-core/secp256k1/pull/1231.
Test suggestions:
1. Using Autottols-based build system:
```
./autogen.sh
./configure
make clean-precomp
make
```
2. Using CMake-based build system:
```
cmake -B build -DCMAKE_C_INCLUDE_WHAT_YOU_USE="include-what-you-use"
cmake --build build --target secp256k1_precomputed
```
ACKs for top commit:
sipa:
utACK e449af6872
real-or-random:
utACK e449af6872
Tree-SHA512: 5aed7a88e1e03fcc2306c43817712c0652ecf6145679dd17f4719376818d372f619e4180bdaee548f2e82aaccbe6a2ff4c37203121d939af545128c8c48b933e
The scheme implemented is described below, and largely follows the paper
"SwiftEC: Shallue–van de Woestijne Indifferentiable Function To Elliptic Curves",
by Chavez-Saab, Rodriguez-Henriquez, and Tibouchi
(https://eprint.iacr.org/2022/759).
A new 64-byte public key format is introduced, with the property that *every*
64-byte array is an encoding for a non-infinite curve point. Each curve point
has roughly 2^256 distinct encodings. This permits disguising public keys as
uniformly random bytes.
The new API functions:
* secp256k1_ellswift_encode: convert a normal public key to an ellswift 64-byte
public key, using additional entropy to pick among the many possible
encodings.
* secp256k1_ellswift_decode: convert an ellswift 64-byte public key to a normal
public key.
* secp256k1_ellswift_create: a faster and safer equivalent to calling
secp256k1_ec_pubkey_create + secp256k1_ellswift_encode.
* secp256k1_ellswift_xdh: x-only ECDH directly on ellswift 64-byte public keys,
where the key encodings are fed to the hash function.
The scheme itself is documented in secp256k1_ellswift.h.
