Merge bitcoin/bitcoin#32028: Update secp256k1 subtree to latest master

c31fcaaad38b68fa170cf9fd900f2237c24016e3 Squashed 'src/secp256k1/' changes from 0cdc758a56..4187a46649 (Hennadii Stepanov)

Pull request description:

  This PR updates the `secp256k1` subtree to 4ba1ba2af9, which includes the following changes:
  - https://github.com/bitcoin-core/secp256k1/pull/1633
  - https://github.com/bitcoin-core/secp256k1/pull/1634
  - https://github.com/bitcoin-core/secp256k1/pull/1641
  - https://github.com/bitcoin-core/secp256k1/pull/1650
  - https://github.com/bitcoin-core/secp256k1/pull/1646
  - https://github.com/bitcoin-core/secp256k1/pull/1654
  - https://github.com/bitcoin-core/secp256k1/pull/1642
  - https://github.com/bitcoin-core/secp256k1/pull/1639
  - https://github.com/bitcoin-core/secp256k1/pull/1614
  - https://github.com/bitcoin-core/secp256k1/pull/1656
  - https://github.com/bitcoin-core/secp256k1/pull/1647
  - https://github.com/bitcoin-core/secp256k1/pull/1655
  - https://github.com/bitcoin-core/secp256k1/pull/1593
  - https://github.com/bitcoin-core/secp256k1/pull/1359
  - https://github.com/bitcoin-core/secp256k1/pull/1657
  - https://github.com/bitcoin-core/secp256k1/pull/1660
  - https://github.com/bitcoin-core/secp256k1/pull/1659
  - https://github.com/bitcoin-core/secp256k1/pull/1661
  - https://github.com/bitcoin-core/secp256k1/pull/1662
  - https://github.com/bitcoin-core/secp256k1/pull/1669
  - https://github.com/bitcoin-core/secp256k1/pull/1492

  https://github.com/bitcoin-core/secp256k1/pull/1647 is required for https://github.com/bitcoin/bitcoin/pull/31507.

ACKs for top commit:
  fanquake:
    ACK 915c1fa72c07a1908f7dc18a065230c7c4a64db2

Tree-SHA512: 2c409ef2cd14fb14c2ea108f65411b673da786e886aabf75015be25220d5a3983ad8d9e76db1cb95453357a07fbaf05497ef4e5bb83d92b96caf62c1cddaa616

src/secp256k1/.cirrus.yml

@@ -29,6 +29,8 @@ env:
   BENCH: yes
   SECP256K1_BENCH_ITERS: 2
   CTIMETESTS: yes
+  SYMBOL_CHECK: yes
+  VIRTUAL_ENV: /root/venv
   # Compile and run the tests
   EXAMPLES: yes
 
@@ -53,6 +55,7 @@ cat_logs_snippet: &CAT_LOGS
 
 linux_arm64_container_snippet: &LINUX_ARM64_CONTAINER
   env_script:
+    - export PATH="$VIRTUAL_ENV/bin:$PATH"
     - env | tee /tmp/env
   build_script:
     - DOCKER_BUILDKIT=1 docker build --file "ci/linux-debian.Dockerfile" --tag="ci_secp256k1_arm"

src/secp256k1/.github/actions/print-logs/action.yml

@@ -0,0 +1,34 @@
+name: "Print logs"
+description: "Print the log files produced by ci/ci.sh"
+runs:
+  using: "composite"
+  steps:
+    - shell: bash
+      run: |
+        # Print the log files produced by ci/ci.sh
+
+        # Helper functions
+        group() {
+            title=$1
+            echo "::group::$title"
+        }
+        endgroup() {
+            echo "::endgroup::"
+        }
+        cat_file() {
+            file=$1
+            group "$file"
+            cat "$file"
+            endgroup
+        }
+
+        # Print all *.log files
+        shopt -s nullglob
+        for file in *.log; do
+            cat_file "$file"
+        done
+
+        # Print environment
+        group "CI env"
+        env
+        endgroup

src/secp256k1/.github/workflows/ci.yml

@@ -40,6 +40,7 @@ env:
   BENCH: 'yes'
   SECP256K1_BENCH_ITERS: 2
   CTIMETESTS: 'yes'
+  SYMBOL_CHECK: 'yes'
   # Compile and run the examples.
   EXAMPLES: 'yes'
 
@@ -107,23 +108,9 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
 
   i686_debian:
     name: "i686: Linux (Debian stable)"
@@ -157,23 +144,9 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
 
   s390x_debian:
     name: "s390x (big-endian): Linux (Debian stable, QEMU)"
@@ -203,23 +176,10 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
+
 
   arm32_debian:
     name: "ARM32: Linux (Debian stable, QEMU)"
@@ -257,23 +217,9 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
 
   arm64_debian:
     name: "ARM64: Linux (Debian stable, QEMU)"
@@ -314,23 +260,9 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
 
   ppc64le_debian:
     name: "ppc64le: Linux (Debian stable, QEMU)"
@@ -360,23 +292,10 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
+
 
   valgrind_debian:
     name: "Valgrind (memcheck)"
@@ -416,23 +335,9 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
 
   sanitizers_debian:
     name: "UBSan, ASan, LSan"
@@ -461,6 +366,7 @@ jobs:
       ASAN_OPTIONS: 'strict_string_checks=1:detect_stack_use_after_return=1:detect_leaks=1'
       LSAN_OPTIONS: 'use_unaligned=1'
       SECP256K1_TEST_ITERS: 32
+      SYMBOL_CHECK: 'no'
 
     steps:
       - name: Checkout
@@ -473,23 +379,9 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
 
   msan_debian:
     name: "MSan"
@@ -525,6 +417,7 @@ jobs:
       SECP256K1_TEST_ITERS: 32
       ASM: 'no'
       WITH_VALGRIND: 'no'
+      SYMBOL_CHECK: 'no'
 
     steps:
       - name: Checkout
@@ -537,23 +430,10 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
+
 
   mingw_debian:
     name: ${{ matrix.configuration.job_name }}
@@ -593,23 +473,9 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
 
   x86_64-macos-native:
     name: "x86_64: macOS Ventura, Valgrind"
@@ -620,6 +486,7 @@ jobs:
       CC: 'clang'
       HOMEBREW_NO_AUTO_UPDATE: 1
       HOMEBREW_NO_INSTALL_CLEANUP: 1
+      SYMBOL_CHECK: 'no'
 
     strategy:
       fail-fast: false
@@ -652,23 +519,15 @@ jobs:
         env: ${{ matrix.env_vars }}
         run: ./ci/ci.sh
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Symbol check
+        run: |
+          python3 --version
+          python3 -m pip install lief
+          python3 ./tools/symbol-check.py .libs/libsecp256k1.dylib
+
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
 
   arm64-macos-native:
     name: "ARM64: macOS Sonoma"
@@ -681,6 +540,7 @@ jobs:
       HOMEBREW_NO_INSTALL_CLEANUP: 1
       WITH_VALGRIND: 'no'
       CTIMETESTS: 'no'
+      SYMBOL_CHECK: 'no'
 
     strategy:
       fail-fast: false
@@ -708,23 +568,20 @@ jobs:
         env: ${{ matrix.env_vars }}
         run: ./ci/ci.sh
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Symbol check
+        env:
+          VIRTUAL_ENV: '${{ github.workspace }}/venv'
+        run: |
+          python3 --version
+          python3 -m venv $VIRTUAL_ENV
+          export PATH="$VIRTUAL_ENV/bin:$PATH"
+          python3 -m pip install lief
+          python3 ./tools/symbol-check.py .libs/libsecp256k1.dylib
+
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
+
 
   win64-native:
     name: ${{ matrix.configuration.job_name }}
@@ -737,6 +594,7 @@ jobs:
         configuration:
           - job_name: 'x64 (MSVC): Windows (VS 2022, shared)'
             cmake_options: '-A x64 -DBUILD_SHARED_LIBS=ON'
+            symbol_check: 'true'
           - job_name: 'x64 (MSVC): Windows (VS 2022, static)'
             cmake_options: '-A x64 -DBUILD_SHARED_LIBS=OFF'
           - job_name: 'x64 (MSVC): Windows (VS 2022, int128_struct)'
@@ -746,6 +604,8 @@ jobs:
             cpp_flags: '/DSECP256K1_MSVC_MULH_TEST_OVERRIDE'
           - job_name: 'x86 (MSVC): Windows (VS 2022)'
             cmake_options: '-A Win32'
+          - job_name: 'x64 (MSVC): Windows (clang-cl)'
+            cmake_options: '-T ClangCL'
 
     steps:
       - name: Checkout
@@ -763,6 +623,13 @@ jobs:
         run: |
           cd build/bin/RelWithDebInfo && file *tests.exe bench*.exe libsecp256k1-*.dll || true
 
+      - name: Symbol check
+        if: ${{ matrix.configuration.symbol_check }}
+        run: |
+          py -3 --version
+          py -3 -m pip install lief
+          py -3 .\tools\symbol-check.py build\bin\RelWithDebInfo\libsecp256k1-5.dll
+
       - name: Check
         run: |
           ctest -C RelWithDebInfo --test-dir build -j ([int]$env:NUMBER_OF_PROCESSORS + 1)
@@ -813,23 +680,9 @@ jobs:
           dockerfile: ./ci/linux-debian.Dockerfile
           tag: linux-debian-image
 
-      - run: cat tests.log || true
-        if: ${{ always() }}
-      - run: cat noverify_tests.log || true
-        if: ${{ always() }}
-      - run: cat exhaustive_tests.log || true
-        if: ${{ always() }}
-      - run: cat ctime_tests.log || true
-        if: ${{ always() }}
-      - run: cat bench.log || true
-        if: ${{ always() }}
-      - run: cat config.log || true
-        if: ${{ always() }}
-      - run: cat test_env.log || true
-        if: ${{ always() }}
-      - name: CI env
-        run: env
-        if: ${{ always() }}
+      - name: Print logs
+        uses: ./.github/actions/print-logs
+        if: ${{ !cancelled() }}
 
   cxx_headers_debian:
     name: "C++ (public headers)"

src/secp256k1/.gitignore

@@ -65,3 +65,7 @@ libsecp256k1.pc
 /CMakeUserPresets.json
 # Default CMake build directory.
 /build
+
+### Python
+__pycache__/
+*.py[oc]

src/secp256k1/CHANGELOG.md

@@ -5,6 +5,13 @@ 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]
+
+#### Removed
+- Removed previously deprecated function aliases `secp256k1_ec_privkey_negate`, `secp256k1_ec_privkey_tweak_add` and
+  `secp256k1_ec_privkey_tweak_mul`. Use `secp256k1_ec_seckey_negate`, `secp256k1_ec_seckey_tweak_add` and
+  `secp256k1_ec_seckey_tweak_mul` instead.
+
 ## [0.6.0] - 2024-11-04
 
 #### Added
@@ -162,6 +169,7 @@ 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/v0.6.0...HEAD
 [0.6.0]: https://github.com/bitcoin-core/secp256k1/compare/v0.5.1...v0.6.0
 [0.5.1]: https://github.com/bitcoin-core/secp256k1/compare/v0.5.0...v0.5.1
 [0.5.0]: https://github.com/bitcoin-core/secp256k1/compare/v0.4.1...v0.5.0

src/secp256k1/CMakeLists.txt

@@ -7,7 +7,7 @@ project(libsecp256k1
   # The package (a.k.a. release) version is based on semantic versioning 2.0.0 of
   # the API. All changes in experimental modules are treated as
   # backwards-compatible and therefore at most increase the minor version.
-  VERSION 0.6.0
+  VERSION 0.6.1
   DESCRIPTION "Optimized C library for ECDSA signatures and secret/public key operations on curve secp256k1."
   HOMEPAGE_URL "https://github.com/bitcoin-core/secp256k1"
   LANGUAGES C
@@ -32,7 +32,7 @@ endif()
 # All changes in experimental modules are treated as if they don't affect the
 # interface and therefore only increase the revision.
 set(${PROJECT_NAME}_LIB_VERSION_CURRENT 5)
-set(${PROJECT_NAME}_LIB_VERSION_REVISION 0)
+set(${PROJECT_NAME}_LIB_VERSION_REVISION 1)
 set(${PROJECT_NAME}_LIB_VERSION_AGE 0)
 
 #=============================
@@ -55,7 +55,7 @@ option(SECP256K1_INSTALL "Enable installation." ${PROJECT_IS_TOP_LEVEL})
 ## Modules
 
 # We declare all options before processing them, to make sure we can express
-# dependendencies while processing.
+# dependencies while processing.
 option(SECP256K1_ENABLE_MODULE_ECDH "Enable ECDH module." ON)
 option(SECP256K1_ENABLE_MODULE_RECOVERY "Enable ECDSA pubkey recovery module." OFF)
 option(SECP256K1_ENABLE_MODULE_EXTRAKEYS "Enable extrakeys module." ON)
@@ -242,17 +242,21 @@ endif()
 
 include(TryAppendCFlags)
 if(MSVC)
-  # Keep the following commands ordered lexicographically.
+  # For both cl and clang-cl compilers.
   try_append_c_flags(/W3) # Production quality warning level.
-  try_append_c_flags(/wd4146) # Disable warning C4146 "unary minus operator applied to unsigned type, result still unsigned".
-  try_append_c_flags(/wd4244) # Disable warning C4244 "'conversion' conversion from 'type1' to 'type2', possible loss of data".
-  try_append_c_flags(/wd4267) # Disable warning C4267 "'var' : conversion from 'size_t' to 'type', possible loss of data".
   # Eliminate deprecation warnings for the older, less secure functions.
   add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
+else()
+  try_append_c_flags(-Wall) # GCC >= 2.95 and probably many other compilers.
+endif()  
+if(CMAKE_C_COMPILER_ID STREQUAL "MSVC")
+  # Keep the following commands ordered lexicographically.
+  try_append_c_flags(/wd4146) # Disable warning C4146 "unary minus operator applied to unsigned type, result still unsigned".
+  try_append_c_flags(/wd4244) # Disable warning C4244 "'conversion' conversion from 'type1' to 'type2', possible loss of data".
+  try_append_c_flags(/wd4267) # Disable warning C4267 "'var' : conversion from 'size_t' to 'type', possible loss of data".
 else()
   # Keep the following commands ordered lexicographically.
   try_append_c_flags(-pedantic)
-  try_append_c_flags(-Wall) # GCC >= 2.95 and probably many other compilers.
   try_append_c_flags(-Wcast-align) # GCC >= 2.95.
   try_append_c_flags(-Wcast-align=strict) # GCC >= 8.0.
   try_append_c_flags(-Wconditional-uninitialized) # Clang >= 3.0 only.
@@ -267,8 +271,6 @@ else()
   try_append_c_flags(-Wundef)
 endif()
 
-set(CMAKE_C_VISIBILITY_PRESET hidden)
-
 set(print_msan_notice)
 if(SECP256K1_BUILD_CTIME_TESTS)
   include(CheckMemorySanitizer)

src/secp256k1/CONTRIBUTING.md

@@ -74,6 +74,7 @@ In addition, libsecp256k1 tries to maintain the following coding conventions:
 * User-facing comment lines in headers should be limited to 80 chars if possible.
 * All identifiers in file scope should start with `secp256k1_`.
 * Avoid trailing whitespace.
+* Use the constants `EXIT_SUCCESS`/`EXIT_FAILURE` (defined in `stdlib.h`) to indicate program execution status for examples and other binaries.
 
 ### Tests
 

src/secp256k1/Makefile.am

@@ -47,6 +47,7 @@ noinst_HEADERS += src/assumptions.h
 noinst_HEADERS += src/checkmem.h
 noinst_HEADERS += src/testutil.h
 noinst_HEADERS += src/util.h
+noinst_HEADERS += src/util_local_visibility.h
 noinst_HEADERS += src/int128.h
 noinst_HEADERS += src/int128_impl.h
 noinst_HEADERS += src/int128_native.h
@@ -249,9 +250,17 @@ maintainer-clean-local: clean-precomp
 ### (see the comments in the previous section for detailed rationale)
 TESTVECTORS = src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.h
 
+if ENABLE_MODULE_ECDH
+TESTVECTORS += src/wycheproof/ecdh_secp256k1_test.h
+endif
+
 src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.h:
 	mkdir -p $(@D)
-	python3 $(top_srcdir)/tools/tests_wycheproof_generate.py $(top_srcdir)/src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.json > $@
+	python3 $(top_srcdir)/tools/tests_wycheproof_generate_ecdsa.py $(top_srcdir)/src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.json > $@
+
+src/wycheproof/ecdh_secp256k1_test.h:
+	mkdir -p $(@D)
+	python3 $(top_srcdir)/tools/tests_wycheproof_generate_ecdh.py $(top_srcdir)/src/wycheproof/ecdh_secp256k1_test.json > $@
 
 testvectors: $(TESTVECTORS)
 
@@ -275,7 +284,9 @@ EXTRA_DIST += sage/secp256k1_params.sage
 EXTRA_DIST += sage/weierstrass_prover.sage
 EXTRA_DIST += src/wycheproof/WYCHEPROOF_COPYING
 EXTRA_DIST += src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.json
-EXTRA_DIST += tools/tests_wycheproof_generate.py
+EXTRA_DIST += src/wycheproof/ecdh_secp256k1_test.json
+EXTRA_DIST += tools/tests_wycheproof_generate_ecdsa.py
+EXTRA_DIST += tools/tests_wycheproof_generate_ecdh.py
 
 if ENABLE_MODULE_ECDH
 include src/modules/ecdh/Makefile.am.include

src/secp256k1/README.md

@@ -61,14 +61,50 @@ Implementation details
   * Optional runtime blinding which attempts to frustrate differential power analysis.
   * The precomputed tables add and eventually subtract points for which no known scalar (secret key) is known, preventing even an attacker with control over the secret key used to control the data internally.
 
+Obtaining and verifying
+-----------------------
+
+The git tag for each release (e.g. `v0.6.0`) is GPG-signed by one of the maintainers.
+For a fully verified build of this project, it is recommended to obtain this repository
+via git, obtain the GPG keys of the signing maintainer(s), and then verify the release
+tag's signature using git.
+
+This can be done with the following steps:
+
+1. Obtain the GPG keys listed in [SECURITY.md](./SECURITY.md).
+2. If possible, cross-reference these key IDs with another source controlled by its owner (e.g.
+   social media, personal website). This is to mitigate the unlikely case that incorrect 
+   content is being presented by this repository.
+3. Clone the repository: 
+    ```
+    git clone https://github.com/bitcoin-core/secp256k1
+    ```
+4. Check out the latest release tag, e.g. 
+    ```
+    git checkout v0.6.0
+    ```
+5. Use git to verify the GPG signature: 
+   ```
+   % git tag -v v0.6.0 | grep -C 3 'Good signature'
+
+   gpg: Signature made Mon 04 Nov 2024 12:14:44 PM EST
+   gpg:                using RSA key 4BBB845A6F5A65A69DFAEC234861DBF262123605
+   gpg: Good signature from "Jonas Nick <jonas@n-ck.net>" [unknown]
+   gpg:                 aka "Jonas Nick <jonasd.nick@gmail.com>" [unknown]
+   gpg: WARNING: This key is not certified with a trusted signature!
+   gpg:          There is no indication that the signature belongs to the owner.
+   Primary key fingerprint: 36C7 1A37 C9D9 88BD E825  08D9 B1A7 0E4F 8DCD 0366
+        Subkey fingerprint: 4BBB 845A 6F5A 65A6 9DFA  EC23 4861 DBF2 6212 3605
+   ```
+
 Building with Autotools
 -----------------------
 
-    $ ./autogen.sh
-    $ ./configure
-    $ make
-    $ make check  # run the test suite
-    $ sudo make install  # optional
+    $ ./autogen.sh       # Generate a ./configure script
+    $ ./configure        # Generate a build system
+    $ make               # Run the actual build process
+    $ make check         # Run the test suite
+    $ sudo make install  # Install the library into the system (optional)
 
 To compile optional modules (such as Schnorr signatures), you need to run `./configure` with additional flags (such as `--enable-module-schnorrsig`). Run `./configure --help` to see the full list of available flags.
 
@@ -79,24 +115,23 @@ To maintain a pristine source tree, CMake encourages to perform an out-of-source
 
 ### Building on POSIX systems
 
-    $ mkdir build && cd build
-    $ cmake ..
-    $ cmake --build .
-    $ ctest  # run the test suite
-    $ sudo cmake --install .  # optional
+    $ cmake -B build              # Generate a build system in subdirectory "build"
+    $ cmake --build build         # Run the actual build process
+    $ ctest --test-dir build      # Run the test suite
+    $ sudo cmake --install build  # Install the library into the system (optional)
 
-To compile optional modules (such as Schnorr signatures), you need to run `cmake` with additional flags (such as `-DSECP256K1_ENABLE_MODULE_SCHNORRSIG=ON`). Run `cmake .. -LH` to see the full list of available flags.
+To compile optional modules (such as Schnorr signatures), you need to run `cmake` with additional flags (such as `-DSECP256K1_ENABLE_MODULE_SCHNORRSIG=ON`). Run `cmake -B build -LH` or `ccmake -B build` to see the full list of available flags.
 
 ### Cross compiling
 
 To alleviate issues with cross compiling, preconfigured toolchain files are available in the `cmake` directory.
 For example, to cross compile for Windows:
 
-    $ cmake .. -DCMAKE_TOOLCHAIN_FILE=../cmake/x86_64-w64-mingw32.toolchain.cmake
+    $ cmake -B build -DCMAKE_TOOLCHAIN_FILE=cmake/x86_64-w64-mingw32.toolchain.cmake
 
 To cross compile for Android with [NDK](https://developer.android.com/ndk/guides/cmake) (using NDK's toolchain file, and assuming the `ANDROID_NDK_ROOT` environment variable has been set):
 
-    $ cmake .. -DCMAKE_TOOLCHAIN_FILE="${ANDROID_NDK_ROOT}/build/cmake/android.toolchain.cmake" -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=28
+    $ cmake -B build -DCMAKE_TOOLCHAIN_FILE="${ANDROID_NDK_ROOT}/build/cmake/android.toolchain.cmake" -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=28
 
 ### Building on Windows
 
@@ -106,7 +141,7 @@ The following example assumes using of Visual Studio 2022 and CMake v3.21+.
 
 In "Developer Command Prompt for VS 2022":
 
-    >cmake -G "Visual Studio 17 2022" -A x64 -S . -B build
+    >cmake -G "Visual Studio 17 2022" -A x64 -B build
     >cmake --build build --config RelWithDebInfo
 
 Usage examples

src/secp256k1/ci/ci.sh

@@ -14,7 +14,7 @@ print_environment() {
     for var in WERROR_CFLAGS MAKEFLAGS BUILD \
             ECMULTWINDOW ECMULTGENKB ASM WIDEMUL WITH_VALGRIND EXTRAFLAGS \
             EXPERIMENTAL ECDH RECOVERY EXTRAKEYS MUSIG SCHNORRSIG ELLSWIFT \
-            SECP256K1_TEST_ITERS BENCH SECP256K1_BENCH_ITERS CTIMETESTS\
+            SECP256K1_TEST_ITERS BENCH SECP256K1_BENCH_ITERS CTIMETESTS SYMBOL_CHECK \
             EXAMPLES \
             HOST WRAPPER_CMD \
             CC CFLAGS CPPFLAGS AR NM \
@@ -94,10 +94,10 @@ if [ $build_exit_code -ne 0 ]; then
         *snapshot*)
             # Ignore internal compiler errors in gcc-snapshot and clang-snapshot
             grep -e "internal compiler error:" -e "PLEASE submit a bug report" make.log
-            return $?;
+            exit $?
             ;;
         *)
-            return 1;
+            exit 1
             ;;
     esac
 fi
@@ -107,6 +107,20 @@ file *tests* || true
 file bench* || true
 file .libs/* || true
 
+if [ "$SYMBOL_CHECK" = "yes" ]
+then
+    python3 --version
+    case "$HOST" in
+        *mingw*)
+            ls -l .libs
+            python3 ./tools/symbol-check.py .libs/libsecp256k1-5.dll
+            ;;
+        *)
+            python3 ./tools/symbol-check.py .libs/libsecp256k1.so
+            ;;
+    esac
+fi
+
 # This tells `make check` to wrap test invocations.
 export LOG_COMPILER="$WRAPPER_CMD"
 

src/secp256k1/ci/linux-debian.Dockerfile

@@ -32,7 +32,7 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
         gcc-powerpc64le-linux-gnu libc6-dev-ppc64el-cross libc6-dbg:ppc64el \
         gcc-mingw-w64-x86-64-win32 wine64 wine \
         gcc-mingw-w64-i686-win32 wine32 \
-        python3 && \
+        python3-full && \
         if ! ( dpkg --print-architecture | grep --quiet "arm64" ) ; then \
          apt-get install --no-install-recommends -y \
          gcc-aarch64-linux-gnu libc6-dev-arm64-cross libc6-dbg:arm64 ;\
@@ -77,3 +77,7 @@ RUN \
     apt-get autoremove -y wget && \
     apt-get clean && rm -rf /var/lib/apt/lists/*
 
+ENV VIRTUAL_ENV=/root/venv
+RUN python3 -m venv $VIRTUAL_ENV
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
+RUN pip install lief

src/secp256k1/configure.ac

@@ -5,8 +5,8 @@ AC_PREREQ([2.60])
 # backwards-compatible and therefore at most increase the minor version.
 define(_PKG_VERSION_MAJOR, 0)
 define(_PKG_VERSION_MINOR, 6)
-define(_PKG_VERSION_PATCH, 0)
-define(_PKG_VERSION_IS_RELEASE, true)
+define(_PKG_VERSION_PATCH, 1)
+define(_PKG_VERSION_IS_RELEASE, false)
 
 # The library version is based on libtool versioning of the ABI. The set of
 # rules for updating the version can be found here:
@@ -14,7 +14,7 @@ define(_PKG_VERSION_IS_RELEASE, true)
 # All changes in experimental modules are treated as if they don't affect the
 # interface and therefore only increase the revision.
 define(_LIB_VERSION_CURRENT, 5)
-define(_LIB_VERSION_REVISION, 0)
+define(_LIB_VERSION_REVISION, 1)
 define(_LIB_VERSION_AGE, 0)
 
 AC_INIT([libsecp256k1],m4_join([.], _PKG_VERSION_MAJOR, _PKG_VERSION_MINOR, _PKG_VERSION_PATCH)m4_if(_PKG_VERSION_IS_RELEASE, [true], [], [-dev]),[https://github.com/bitcoin-core/secp256k1/issues],[libsecp256k1],[https://github.com/bitcoin-core/secp256k1])
@@ -111,7 +111,6 @@ AC_DEFUN([SECP_TRY_APPEND_DEFAULT_CFLAGS], [
       SECP_TRY_APPEND_CFLAGS([-Wcast-align=strict], $1) # GCC >= 8.0
       SECP_TRY_APPEND_CFLAGS([-Wconditional-uninitialized], $1) # Clang >= 3.0 only
       SECP_TRY_APPEND_CFLAGS([-Wreserved-identifier], $1) # Clang >= 13.0 only
-      SECP_TRY_APPEND_CFLAGS([-fvisibility=hidden], $1) # GCC >= 4.0
 
       CFLAGS="$SECP_TRY_APPEND_DEFAULT_CFLAGS_saved_CFLAGS"
     fi
@@ -254,8 +253,8 @@ fi
 print_msan_notice=no
 if test x"$enable_ctime_tests" = x"yes"; then
   SECP_MSAN_CHECK
-  # MSan on Clang >=16 reports unitialized memory in function parameters and return values, even if
-  # the uninitalized variable is never actually "used". This is called "eager" checking, and it's
+  # MSan on Clang >=16 reports uninitialized memory in function parameters and return values, even if
+  # the uninitialized variable is never actually "used". This is called "eager" checking, and it's
   # sounds like good idea for normal use of MSan. However, it yields many false positives in the
   # ctime_tests because many return values depend on secret (i.e., "uninitialized") values, and
   # we're only interested in detecting branches (which count as "uses") on secret data.
@@ -477,6 +476,7 @@ echo "Build Options:"
 echo "  with external callbacks = $enable_external_default_callbacks"
 echo "  with benchmarks         = $enable_benchmark"
 echo "  with tests              = $enable_tests"
+echo "  with exhaustive tests   = $enable_exhaustive_tests"
 echo "  with ctime tests        = $enable_ctime_tests"
 echo "  with coverage           = $enable_coverage"
 echo "  with examples           = $enable_examples"

src/secp256k1/examples/ecdh.c

@@ -8,6 +8,7 @@
  *************************************************************************/
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <assert.h>
 #include <string.h>
 
@@ -33,7 +34,7 @@ int main(void) {
     secp256k1_context* ctx = secp256k1_context_create(SECP256K1_CONTEXT_NONE);
     if (!fill_random(randomize, sizeof(randomize))) {
         printf("Failed to generate randomness\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     /* Randomizing the context is recommended to protect against side-channel
      * leakage See `secp256k1_context_randomize` in secp256k1.h for more
@@ -44,14 +45,14 @@ int main(void) {
     /*** Key Generation ***/
     if (!fill_random(seckey1, sizeof(seckey1)) || !fill_random(seckey2, sizeof(seckey2))) {
         printf("Failed to generate randomness\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     /* If the secret key is zero or out of range (greater than secp256k1's
     * order), we fail. Note that the probability of this occurring is negligible
     * with a properly functioning random number generator. */
     if (!secp256k1_ec_seckey_verify(ctx, seckey1) || !secp256k1_ec_seckey_verify(ctx, seckey2)) {
         printf("Generated secret key is invalid. This indicates an issue with the random number generator.\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 
     /* Public key creation using a valid context with a verified secret key should never fail */
@@ -116,5 +117,5 @@ int main(void) {
     secure_erase(shared_secret1, sizeof(shared_secret1));
     secure_erase(shared_secret2, sizeof(shared_secret2));
 
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/examples/ecdsa.c

@@ -8,6 +8,7 @@
  *************************************************************************/
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <assert.h>
 #include <string.h>
 
@@ -40,7 +41,7 @@ int main(void) {
     secp256k1_context* ctx = secp256k1_context_create(SECP256K1_CONTEXT_NONE);
     if (!fill_random(randomize, sizeof(randomize))) {
         printf("Failed to generate randomness\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     /* Randomizing the context is recommended to protect against side-channel
      * leakage See `secp256k1_context_randomize` in secp256k1.h for more
@@ -51,14 +52,14 @@ int main(void) {
     /*** Key Generation ***/
     if (!fill_random(seckey, sizeof(seckey))) {
         printf("Failed to generate randomness\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     /* If the secret key is zero or out of range (greater than secp256k1's
     * order), we fail. Note that the probability of this occurring is negligible
     * with a properly functioning random number generator. */
     if (!secp256k1_ec_seckey_verify(ctx, seckey)) {
         printf("Generated secret key is invalid. This indicates an issue with the random number generator.\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 
     /* Public key creation using a valid context with a verified secret key should never fail */
@@ -92,13 +93,13 @@ int main(void) {
     /* Deserialize the signature. This will return 0 if the signature can't be parsed correctly. */
     if (!secp256k1_ecdsa_signature_parse_compact(ctx, &sig, serialized_signature)) {
         printf("Failed parsing the signature\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 
     /* Deserialize the public key. This will return 0 if the public key can't be parsed correctly. */
     if (!secp256k1_ec_pubkey_parse(ctx, &pubkey, compressed_pubkey, sizeof(compressed_pubkey))) {
         printf("Failed parsing the public key\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 
     /* Verify a signature. This will return 1 if it's valid and 0 if it's not. */
@@ -133,5 +134,5 @@ int main(void) {
      * will remove any writes that aren't used. */
     secure_erase(seckey, sizeof(seckey));
 
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/examples/ellswift.c

@@ -13,6 +13,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <assert.h>
 #include <string.h>
 
@@ -38,7 +39,7 @@ int main(void) {
     ctx = secp256k1_context_create(SECP256K1_CONTEXT_NONE);
     if (!fill_random(randomize, sizeof(randomize))) {
         printf("Failed to generate randomness\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     /* Randomizing the context is recommended to protect against side-channel
      * leakage. See `secp256k1_context_randomize` in secp256k1.h for more
@@ -49,14 +50,14 @@ int main(void) {
     /*** Generate secret keys ***/
     if (!fill_random(seckey1, sizeof(seckey1)) || !fill_random(seckey2, sizeof(seckey2))) {
         printf("Failed to generate randomness\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     /* If the secret key is zero or out of range (greater than secp256k1's
     * order), we fail. Note that the probability of this occurring is negligible
     * with a properly functioning random number generator. */
     if (!secp256k1_ec_seckey_verify(ctx, seckey1) || !secp256k1_ec_seckey_verify(ctx, seckey2)) {
         printf("Generated secret key is invalid. This indicates an issue with the random number generator.\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 
     /* Generate ElligatorSwift public keys. This should never fail with valid context and
@@ -64,7 +65,7 @@ int main(void) {
        optional, but recommended. */
     if (!fill_random(auxrand1, sizeof(auxrand1)) || !fill_random(auxrand2, sizeof(auxrand2))) {
         printf("Failed to generate randomness\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     return_val = secp256k1_ellswift_create(ctx, ellswift_pubkey1, seckey1, auxrand1);
     assert(return_val);
@@ -117,5 +118,5 @@ int main(void) {
     secure_erase(shared_secret1, sizeof(shared_secret1));
     secure_erase(shared_secret2, sizeof(shared_secret2));
 
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/examples/musig.c

@@ -12,6 +12,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <assert.h>
 #include <string.h>
 
@@ -193,7 +194,7 @@ int main(void) {
     for (i = 0; i < N_SIGNERS; i++) {
         if (!create_keypair(ctx, &signer_secrets[i], &signers[i])) {
             printf("FAILED\n");
-            return 1;
+            return EXIT_FAILURE;
         }
         pubkeys_ptr[i] = &signers[i].pubkey;
     }
@@ -208,7 +209,7 @@ int main(void) {
     fflush(stdout);
     if (!secp256k1_ec_pubkey_sort(ctx, pubkeys_ptr, N_SIGNERS)) {
         printf("FAILED\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     printf("ok\n");
 
@@ -219,7 +220,7 @@ int main(void) {
      * while providing a non-NULL agg_pk argument. */
     if (!secp256k1_musig_pubkey_agg(ctx, NULL, &cache, pubkeys_ptr, N_SIGNERS)) {
         printf("FAILED\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     printf("ok\n");
     printf("Tweaking................");
@@ -227,21 +228,21 @@ int main(void) {
     /* Optionally tweak the aggregate key */
     if (!tweak(ctx, &agg_pk, &cache)) {
         printf("FAILED\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     printf("ok\n");
     printf("Signing message.........");
     fflush(stdout);
     if (!sign(ctx, signer_secrets, signers, &cache, msg, sig)) {
         printf("FAILED\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     printf("ok\n");
     printf("Verifying signature.....");
     fflush(stdout);
     if (!secp256k1_schnorrsig_verify(ctx, sig, msg, 32, &agg_pk)) {
         printf("FAILED\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     printf("ok\n");
 
@@ -256,5 +257,5 @@ int main(void) {
         secure_erase(&signer_secrets[i], sizeof(signer_secrets[i]));
     }
     secp256k1_context_destroy(ctx);
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/examples/schnorr.c

@@ -8,6 +8,7 @@
  *************************************************************************/
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <assert.h>
 #include <string.h>
 
@@ -34,7 +35,7 @@ int main(void) {
     secp256k1_context* ctx = secp256k1_context_create(SECP256K1_CONTEXT_NONE);
     if (!fill_random(randomize, sizeof(randomize))) {
         printf("Failed to generate randomness\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     /* Randomizing the context is recommended to protect against side-channel
      * leakage See `secp256k1_context_randomize` in secp256k1.h for more
@@ -45,7 +46,7 @@ int main(void) {
     /*** Key Generation ***/
     if (!fill_random(seckey, sizeof(seckey))) {
         printf("Failed to generate randomness\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     /* Try to create a keypair with a valid context. This only fails if the
      * secret key is zero or out of range (greater than secp256k1's order). Note
@@ -53,7 +54,7 @@ int main(void) {
      * functioning random number generator. */
     if (!secp256k1_keypair_create(ctx, &keypair, seckey)) {
         printf("Generated secret key is invalid. This indicates an issue with the random number generator.\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 
     /* Extract the X-only public key from the keypair. We pass NULL for
@@ -90,7 +91,7 @@ int main(void) {
     /* Generate 32 bytes of randomness to use with BIP-340 schnorr signing. */
     if (!fill_random(auxiliary_rand, sizeof(auxiliary_rand))) {
         printf("Failed to generate randomness\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 
     /* Generate a Schnorr signature.
@@ -110,7 +111,7 @@ int main(void) {
      * be parsed correctly */
     if (!secp256k1_xonly_pubkey_parse(ctx, &pubkey, serialized_pubkey)) {
         printf("Failed parsing the public key\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 
     /* Compute the tagged hash on the received messages using the same tag as the signer. */
@@ -149,5 +150,5 @@ int main(void) {
      * Here we are preventing these writes from being optimized out, as any good compiler
      * will remove any writes that aren't used. */
     secure_erase(seckey, sizeof(seckey));
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/include/secp256k1.h

@@ -230,10 +230,10 @@ typedef int (*secp256k1_nonce_function)(
  *
  *  It is highly recommended to call secp256k1_selftest before using this context.
  */
-SECP256K1_API const secp256k1_context *secp256k1_context_static;
+SECP256K1_API const secp256k1_context * const secp256k1_context_static;
 
 /** Deprecated alias for secp256k1_context_static. */
-SECP256K1_API const secp256k1_context *secp256k1_context_no_precomp
+SECP256K1_API const secp256k1_context * const secp256k1_context_no_precomp
 SECP256K1_DEPRECATED("Use secp256k1_context_static instead");
 
 /** Perform basic self tests (to be used in conjunction with secp256k1_context_static)
@@ -701,21 +701,13 @@ SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_seckey_negate(
     unsigned char *seckey
 ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2);
 
-/** Same as secp256k1_ec_seckey_negate, but DEPRECATED. Will be removed in
- *  future versions. */
-SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_privkey_negate(
-    const secp256k1_context *ctx,
-    unsigned char *seckey
-) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2)
-  SECP256K1_DEPRECATED("Use secp256k1_ec_seckey_negate instead");
-
 /** Negates a public key in place.
  *
  *  Returns: 1 always
  *  Args:   ctx:        pointer to a context object
  *  In/Out: pubkey:     pointer to the public key to be negated.
  */
-SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_pubkey_negate(
+SECP256K1_API int secp256k1_ec_pubkey_negate(
     const secp256k1_context *ctx,
     secp256k1_pubkey *pubkey
 ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2);
@@ -741,15 +733,6 @@ SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_seckey_tweak_add(
     const unsigned char *tweak32
 ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
 
-/** Same as secp256k1_ec_seckey_tweak_add, but DEPRECATED. Will be removed in
- *  future versions. */
-SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_privkey_tweak_add(
-    const secp256k1_context *ctx,
-    unsigned char *seckey,
-    const unsigned char *tweak32
-) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3)
-  SECP256K1_DEPRECATED("Use secp256k1_ec_seckey_tweak_add instead");
-
 /** Tweak a public key by adding tweak times the generator to it.
  *
  *  Returns: 0 if the arguments are invalid or the resulting public key would be
@@ -788,15 +771,6 @@ SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_seckey_tweak_mul(
     const unsigned char *tweak32
 ) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3);
 
-/** Same as secp256k1_ec_seckey_tweak_mul, but DEPRECATED. Will be removed in
- *  future versions. */
-SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_privkey_tweak_mul(
-    const secp256k1_context *ctx,
-    unsigned char *seckey,
-    const unsigned char *tweak32
-) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3)
-  SECP256K1_DEPRECATED("Use secp256k1_ec_seckey_tweak_mul instead");
-
 /** Tweak a public key by multiplying it by a tweak value.
  *
  *  Returns: 0 if the arguments are invalid. 1 otherwise.
@@ -883,7 +857,7 @@ SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ec_pubkey_combine(
  *           msg: pointer to an array containing the message
  *        msglen: length of the message array
  */
-SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_tagged_sha256(
+SECP256K1_API int secp256k1_tagged_sha256(
     const secp256k1_context *ctx,
     unsigned char *hash32,
     const unsigned char *tag,

src/secp256k1/include/secp256k1_extrakeys.h

@@ -90,7 +90,7 @@ SECP256K1_API int secp256k1_xonly_pubkey_cmp(
  *                     the negation of the pubkey and set to 0 otherwise.
  *  In:        pubkey: pointer to a public key that is converted.
  */
-SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_xonly_pubkey_from_pubkey(
+SECP256K1_API int secp256k1_xonly_pubkey_from_pubkey(
     const secp256k1_context *ctx,
     secp256k1_xonly_pubkey *xonly_pubkey,
     int *pk_parity,
@@ -179,7 +179,7 @@ SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_keypair_create(
  *  Out: seckey: pointer to a 32-byte buffer for the secret key.
  *  In: keypair: pointer to a keypair.
  */
-SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_keypair_sec(
+SECP256K1_API int secp256k1_keypair_sec(
     const secp256k1_context *ctx,
     unsigned char *seckey,
     const secp256k1_keypair *keypair
@@ -192,7 +192,7 @@ SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_keypair_sec(
  *  Out: pubkey: pointer to a pubkey object, set to the keypair public key.
  *  In: keypair: pointer to a keypair.
  */
-SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_keypair_pub(
+SECP256K1_API int secp256k1_keypair_pub(
     const secp256k1_context *ctx,
     secp256k1_pubkey *pubkey,
     const secp256k1_keypair *keypair
@@ -211,7 +211,7 @@ SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_keypair_pub(
  *               pk_parity argument of secp256k1_xonly_pubkey_from_pubkey.
  *  In: keypair: pointer to a keypair.
  */
-SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_keypair_xonly_pub(
+SECP256K1_API int secp256k1_keypair_xonly_pub(
     const secp256k1_context *ctx,
     secp256k1_xonly_pubkey *pubkey,
     int *pk_parity,

src/secp256k1/src/bench.c

@@ -5,6 +5,7 @@
  ***********************************************************************/
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "../include/secp256k1.h"
@@ -15,18 +16,22 @@ static void help(int default_iters) {
     printf("Benchmarks the following algorithms:\n");
     printf("    - ECDSA signing/verification\n");
 
-#ifdef ENABLE_MODULE_ECDH
-    printf("    - ECDH key exchange (optional module)\n");
-#endif
-
 #ifdef ENABLE_MODULE_RECOVERY
     printf("    - Public key recovery (optional module)\n");
 #endif
 
+#ifdef ENABLE_MODULE_ECDH
+    printf("    - ECDH key exchange (optional module)\n");
+#endif
+
 #ifdef ENABLE_MODULE_SCHNORRSIG
     printf("    - Schnorr signatures (optional module)\n");
 #endif
 
+#ifdef ENABLE_MODULE_ELLSWIFT
+    printf("    - ElligatorSwift (optional module)\n");
+#endif
+
     printf("\n");
     printf("The default number of iterations for each benchmark is %d. This can be\n", default_iters);
     printf("customized using the SECP256K1_BENCH_ITERS environment variable.\n");
@@ -188,11 +193,11 @@ int main(int argc, char** argv) {
            || have_flag(argc, argv, "--help")
            || have_flag(argc, argv, "help")) {
             help(default_iters);
-            return 0;
+            return EXIT_SUCCESS;
         } else if (invalid_args) {
             fprintf(stderr, "./bench: unrecognized argument.\n\n");
             help(default_iters);
-            return 1;
+            return EXIT_FAILURE;
         }
     }
 
@@ -201,7 +206,7 @@ int main(int argc, char** argv) {
     if (have_flag(argc, argv, "ecdh")) {
         fprintf(stderr, "./bench: ECDH module not enabled.\n");
         fprintf(stderr, "Use ./configure --enable-module-ecdh.\n\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 #endif
 
@@ -209,7 +214,7 @@ int main(int argc, char** argv) {
     if (have_flag(argc, argv, "recover") || have_flag(argc, argv, "ecdsa_recover")) {
         fprintf(stderr, "./bench: Public key recovery module not enabled.\n");
         fprintf(stderr, "Use ./configure --enable-module-recovery.\n\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 #endif
 
@@ -217,7 +222,7 @@ int main(int argc, char** argv) {
     if (have_flag(argc, argv, "schnorrsig") || have_flag(argc, argv, "schnorrsig_sign") || have_flag(argc, argv, "schnorrsig_verify")) {
         fprintf(stderr, "./bench: Schnorr signatures module not enabled.\n");
         fprintf(stderr, "Use ./configure --enable-module-schnorrsig.\n\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 #endif
 
@@ -227,7 +232,7 @@ int main(int argc, char** argv) {
         have_flag(argc, argv, "ellswift_ecdh")) {
         fprintf(stderr, "./bench: ElligatorSwift module not enabled.\n");
         fprintf(stderr, "Use ./configure --enable-module-ellswift.\n\n");
-        return 1;
+        return EXIT_FAILURE;
     }
 #endif
 
@@ -275,5 +280,5 @@ int main(int argc, char** argv) {
     run_ellswift_bench(iters, argc, argv);
 #endif
 
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/src/bench.h

@@ -24,7 +24,7 @@ static int64_t gettime_i64(void) {
     struct timespec tv;
     if (!timespec_get(&tv, TIME_UTC)) {
         fputs("timespec_get failed!", stderr);
-        exit(1);
+        exit(EXIT_FAILURE);
     }
     return (int64_t)tv.tv_nsec / 1000 + (int64_t)tv.tv_sec * 1000000LL;
 #else

src/secp256k1/src/bench_ecmult.c

@@ -4,6 +4,7 @@
  * file COPYING or https://www.opensource.org/licenses/mit-license.php.*
  ***********************************************************************/
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "secp256k1.c"
 #include "../include/secp256k1.h"
@@ -287,7 +288,7 @@ int main(int argc, char **argv) {
            || have_flag(argc, argv, "--help")
            || have_flag(argc, argv, "help")) {
             help(argv);
-            return 0;
+            return EXIT_SUCCESS;
         } else if(have_flag(argc, argv, "pippenger_wnaf")) {
             printf("Using pippenger_wnaf:\n");
             data.ecmult_multi = secp256k1_ecmult_pippenger_batch_single;
@@ -299,7 +300,7 @@ int main(int argc, char **argv) {
         } else {
             fprintf(stderr, "%s: unrecognized argument '%s'.\n\n", argv[0], argv[1]);
             help(argv);
-            return 1;
+            return EXIT_FAILURE;
         }
     }
 
@@ -363,5 +364,5 @@ int main(int argc, char **argv) {
     free(data.output);
     free(data.expected_output);
 
-    return(0);
+    return EXIT_SUCCESS;
 }

src/secp256k1/src/bench_internal.c

@@ -4,6 +4,7 @@
  * file COPYING or https://www.opensource.org/licenses/mit-license.php.*
  ***********************************************************************/
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "secp256k1.c"
 #include "../include/secp256k1.h"
@@ -393,7 +394,7 @@ int main(int argc, char **argv) {
            || have_flag(argc, argv, "--help")
            || have_flag(argc, argv, "help")) {
             help(default_iters);
-            return 0;
+            return EXIT_SUCCESS;
         }
     }
 
@@ -432,5 +433,5 @@ int main(int argc, char **argv) {
 
     if (d || have_flag(argc, argv, "context")) run_benchmark("context_create", bench_context, bench_setup, NULL, &data, 10, iters);
 
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/src/ctime_tests.c

@@ -5,6 +5,7 @@
  ***********************************************************************/
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "../include/secp256k1.h"
@@ -49,7 +50,7 @@ int main(void) {
     if (!SECP256K1_CHECKMEM_RUNNING()) {
         fprintf(stderr, "This test can only usefully be run inside valgrind because it was not compiled under msan.\n");
         fprintf(stderr, "Usage: libtool --mode=execute valgrind ./ctime_tests\n");
-        return 1;
+        return EXIT_FAILURE;
     }
     ctx = secp256k1_context_create(SECP256K1_CONTEXT_DECLASSIFY);
     /** In theory, testing with a single secret input should be sufficient:
@@ -69,7 +70,7 @@ int main(void) {
     CHECK(ret);
 
     secp256k1_context_destroy(ctx);
-    return 0;
+    return EXIT_SUCCESS;
 }
 
 static void run_tests(secp256k1_context *ctx, unsigned char *key) {

src/secp256k1/src/eckey_impl.h

@@ -9,6 +9,7 @@
 
 #include "eckey.h"
 
+#include "util.h"
 #include "scalar.h"
 #include "field.h"
 #include "group.h"
@@ -35,6 +36,8 @@ static int secp256k1_eckey_pubkey_parse(secp256k1_ge *elem, const unsigned char
 }
 
 static int secp256k1_eckey_pubkey_serialize(secp256k1_ge *elem, unsigned char *pub, size_t *size, int compressed) {
+    VERIFY_CHECK(compressed == 0 || compressed == 1);
+
     if (secp256k1_ge_is_infinity(elem)) {
         return 0;
     }

src/secp256k1/src/group.h

@@ -80,7 +80,11 @@ static void secp256k1_ge_set_gej(secp256k1_ge *r, secp256k1_gej *a);
 /** Set a group element equal to another which is given in jacobian coordinates. */
 static void secp256k1_ge_set_gej_var(secp256k1_ge *r, secp256k1_gej *a);
 
-/** Set a batch of group elements equal to the inputs given in jacobian coordinates */
+/** Set group elements r[0:len] (affine) equal to group elements a[0:len] (jacobian).
+ * None of the group elements in a[0:len] may be infinity. Constant time. */
+static void secp256k1_ge_set_all_gej(secp256k1_ge *r, const secp256k1_gej *a, size_t len);
+
+/** Set group elements r[0:len] (affine) equal to group elements a[0:len] (jacobian). */
 static void secp256k1_ge_set_all_gej_var(secp256k1_ge *r, const secp256k1_gej *a, size_t len);
 
 /** Bring a batch of inputs to the same global z "denominator", based on ratios between

src/secp256k1/src/group_impl.h

@@ -195,6 +195,44 @@ static void secp256k1_ge_set_gej_var(secp256k1_ge *r, secp256k1_gej *a) {
     SECP256K1_GE_VERIFY(r);
 }
 
+static void secp256k1_ge_set_all_gej(secp256k1_ge *r, const secp256k1_gej *a, size_t len) {
+    secp256k1_fe u;
+    size_t i;
+#ifdef VERIFY
+    for (i = 0; i < len; i++) {
+        SECP256K1_GEJ_VERIFY(&a[i]);
+        VERIFY_CHECK(!secp256k1_gej_is_infinity(&a[i]));
+    }
+#endif
+
+    if (len == 0) {
+        return;
+    }
+
+    /* Use destination's x coordinates as scratch space */
+    r[0].x = a[0].z;
+    for (i = 1; i < len; i++) {
+        secp256k1_fe_mul(&r[i].x, &r[i - 1].x, &a[i].z);
+    }
+    secp256k1_fe_inv(&u, &r[len - 1].x);
+
+    for (i = len - 1; i > 0; i--) {
+        secp256k1_fe_mul(&r[i].x, &r[i - 1].x, &u);
+        secp256k1_fe_mul(&u, &u, &a[i].z);
+    }
+    r[0].x = u;
+
+    for (i = 0; i < len; i++) {
+        secp256k1_ge_set_gej_zinv(&r[i], &a[i], &r[i].x);
+    }
+
+#ifdef VERIFY
+    for (i = 0; i < len; i++) {
+        SECP256K1_GE_VERIFY(&r[i]);
+    }
+#endif
+}
+
 static void secp256k1_ge_set_all_gej_var(secp256k1_ge *r, const secp256k1_gej *a, size_t len) {
     secp256k1_fe u;
     size_t i;

src/secp256k1/src/modules/ecdh/Makefile.am.include

@@ -2,3 +2,4 @@ include_HEADERS += include/secp256k1_ecdh.h
 noinst_HEADERS += src/modules/ecdh/main_impl.h
 noinst_HEADERS += src/modules/ecdh/tests_impl.h
 noinst_HEADERS += src/modules/ecdh/bench_impl.h
+noinst_HEADERS += src/wycheproof/ecdh_secp256k1_test.h

src/secp256k1/src/modules/ecdh/tests_impl.h

@@ -7,6 +7,13 @@
 #ifndef SECP256K1_MODULE_ECDH_TESTS_H
 #define SECP256K1_MODULE_ECDH_TESTS_H
 
+static int ecdh_hash_function_test_xpassthru(unsigned char *output, const unsigned char *x, const unsigned char *y, void *data) {
+    (void)y;
+    (void)data;
+    memcpy(output, x, 32);
+    return 1;
+}
+
 static int ecdh_hash_function_test_fail(unsigned char *output, const unsigned char *x, const unsigned char *y, void *data) {
     (void)output;
     (void)x;
@@ -142,11 +149,45 @@ static void test_result_basepoint(void) {
     }
 }
 
+static void test_ecdh_wycheproof(void) {
+#include "../../wycheproof/ecdh_secp256k1_test.h"
+    int t;
+    for (t = 0; t < SECP256K1_ECDH_WYCHEPROOF_NUMBER_TESTVECTORS; t++) {
+        int parsed_ok;
+        secp256k1_pubkey point;
+        const unsigned char *pk;
+        const unsigned char *sk;
+        const unsigned char *expected_shared_secret;
+        unsigned char output_ecdh[65] = { 0 };
+
+        int expected_result;
+
+        memset(&point, 0, sizeof(point));
+        pk = &wycheproof_ecdh_public_keys[testvectors[t].pk_offset];
+        parsed_ok = secp256k1_ec_pubkey_parse(CTX, &point, pk, testvectors[t].pk_len);
+
+        expected_result = testvectors[t].expected_result;
+        CHECK(parsed_ok == expected_result);
+        if (!parsed_ok) {
+            continue;
+        }
+
+        sk = &wycheproof_ecdh_private_keys[testvectors[t].sk_offset];
+        CHECK(testvectors[t].sk_len == 32);
+
+        CHECK(secp256k1_ecdh(CTX, output_ecdh, &point, sk, ecdh_hash_function_test_xpassthru, NULL) == 1);
+        expected_shared_secret = &wycheproof_ecdh_shared_secrets[testvectors[t].shared_offset];
+
+        CHECK(secp256k1_memcmp_var(output_ecdh, expected_shared_secret, testvectors[t].shared_len) == 0);
+    }
+}
+
 static void run_ecdh_tests(void) {
     test_ecdh_api();
     test_ecdh_generator_basepoint();
     test_bad_scalar();
     test_result_basepoint();
+    test_ecdh_wycheproof();
 }
 
 #endif /* SECP256K1_MODULE_ECDH_TESTS_H */

src/secp256k1/src/modules/musig/session_impl.h

@@ -395,6 +395,7 @@ static void secp256k1_nonce_function_musig(secp256k1_scalar *k, const unsigned c
 static int secp256k1_musig_nonce_gen_internal(const secp256k1_context* ctx, secp256k1_musig_secnonce *secnonce, secp256k1_musig_pubnonce *pubnonce, const unsigned char *input_nonce, const unsigned char *seckey, const secp256k1_pubkey *pubkey, const unsigned char *msg32, const secp256k1_musig_keyagg_cache *keyagg_cache, const unsigned char *extra_input32) {
     secp256k1_scalar k[2];
     secp256k1_ge nonce_pts[2];
+    secp256k1_gej nonce_ptj[2];
     int i;
     unsigned char pk_ser[33];
     size_t pk_ser_len = sizeof(pk_ser);
@@ -444,13 +445,20 @@ static int secp256k1_musig_nonce_gen_internal(const secp256k1_context* ctx, secp
     secp256k1_musig_secnonce_save(secnonce, k, &pk);
     secp256k1_musig_secnonce_invalidate(ctx, secnonce, !ret);
 
+    /* Compute pubnonce as two gejs */
     for (i = 0; i < 2; i++) {
-        secp256k1_gej nonce_ptj;
-        secp256k1_ecmult_gen(&ctx->ecmult_gen_ctx, &nonce_ptj, &k[i]);
-        secp256k1_ge_set_gej(&nonce_pts[i], &nonce_ptj);
-        secp256k1_declassify(ctx, &nonce_pts[i], sizeof(nonce_pts[i]));
+        secp256k1_ecmult_gen(&ctx->ecmult_gen_ctx, &nonce_ptj[i], &k[i]);
         secp256k1_scalar_clear(&k[i]);
-        secp256k1_gej_clear(&nonce_ptj);
+    }
+
+    /* Batch convert to two public ges */
+    secp256k1_ge_set_all_gej(nonce_pts, nonce_ptj, 2);
+    for (i = 0; i < 2; i++) {
+        secp256k1_gej_clear(&nonce_ptj[i]);
+    }
+
+    for (i = 0; i < 2; i++) {
+        secp256k1_declassify(ctx, &nonce_pts[i], sizeof(nonce_pts[i]));
     }
     /* None of the nonce_pts will be infinity because k != 0 with overwhelming
      * probability */

src/secp256k1/src/modules/schnorrsig/main_impl.h

@@ -94,6 +94,8 @@ static int nonce_function_bip340(unsigned char *nonce32, const unsigned char *ms
     secp256k1_sha256_write(&sha, msg, msglen);
     secp256k1_sha256_finalize(&sha, nonce32);
     secp256k1_sha256_clear(&sha);
+    secp256k1_memclear(masked_key, sizeof(masked_key));
+
     return 1;
 }
 

src/secp256k1/src/precompute_ecmult.c

@@ -6,6 +6,7 @@
 
 #include <inttypes.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "../include/secp256k1.h"
 
@@ -62,7 +63,7 @@ int main(void) {
     fp = fopen(outfile, "w");
     if (fp == NULL) {
         fprintf(stderr, "Could not open %s for writing!\n", outfile);
-        return -1;
+        return EXIT_FAILURE;
     }
 
     fprintf(fp, "/* This file was automatically generated by precompute_ecmult. */\n");
@@ -86,5 +87,5 @@ int main(void) {
     fprintf(fp, "#undef S\n");
     fclose(fp);
 
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/src/precompute_ecmult_gen.c

@@ -6,6 +6,7 @@
 
 #include <inttypes.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 #include "../include/secp256k1.h"
 
@@ -64,7 +65,7 @@ int main(int argc, char **argv) {
     fp = fopen(outfile, "w");
     if (fp == NULL) {
         fprintf(stderr, "Could not open %s for writing!\n", outfile);
-        return -1;
+        return EXIT_FAILURE;
     }
 
     fprintf(fp, "/* This file was automatically generated by precompute_ecmult_gen. */\n");
@@ -96,5 +97,5 @@ int main(int argc, char **argv) {
     fprintf(fp, "#undef S\n");
     fclose(fp);
 
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/src/precomputed_ecmult.h

@@ -13,6 +13,8 @@ extern "C" {
 
 #include "ecmult.h"
 #include "group.h"
+#include "util_local_visibility.h"
+
 #if defined(EXHAUSTIVE_TEST_ORDER)
 #    if EXHAUSTIVE_TEST_ORDER == 7
 #        define WINDOW_G 3
@@ -27,8 +29,8 @@ static secp256k1_ge_storage secp256k1_pre_g[ECMULT_TABLE_SIZE(WINDOW_G)];
 static secp256k1_ge_storage secp256k1_pre_g_128[ECMULT_TABLE_SIZE(WINDOW_G)];
 #else /* !defined(EXHAUSTIVE_TEST_ORDER) */
 #    define WINDOW_G ECMULT_WINDOW_SIZE
-extern const secp256k1_ge_storage secp256k1_pre_g[ECMULT_TABLE_SIZE(WINDOW_G)];
-extern const secp256k1_ge_storage secp256k1_pre_g_128[ECMULT_TABLE_SIZE(WINDOW_G)];
+SECP256K1_LOCAL_VAR const secp256k1_ge_storage secp256k1_pre_g[ECMULT_TABLE_SIZE(WINDOW_G)];
+SECP256K1_LOCAL_VAR const secp256k1_ge_storage secp256k1_pre_g_128[ECMULT_TABLE_SIZE(WINDOW_G)];
 #endif /* defined(EXHAUSTIVE_TEST_ORDER) */
 
 #ifdef __cplusplus

src/secp256k1/src/precomputed_ecmult_gen.h

@@ -13,10 +13,12 @@ extern "C" {
 
 #include "group.h"
 #include "ecmult_gen.h"
+#include "util_local_visibility.h"
+
 #ifdef EXHAUSTIVE_TEST_ORDER
 static secp256k1_ge_storage secp256k1_ecmult_gen_prec_table[COMB_BLOCKS][COMB_POINTS];
 #else
-extern const secp256k1_ge_storage secp256k1_ecmult_gen_prec_table[COMB_BLOCKS][COMB_POINTS];
+SECP256K1_LOCAL_VAR const secp256k1_ge_storage secp256k1_ecmult_gen_prec_table[COMB_BLOCKS][COMB_POINTS];
 #endif /* defined(EXHAUSTIVE_TEST_ORDER) */
 
 #ifdef __cplusplus

src/secp256k1/src/scalar_impl.h

@@ -90,11 +90,11 @@ static void secp256k1_scalar_split_lambda_verify(const secp256k1_scalar *r1, con
 #endif
 
 /*
- * Both lambda and beta are primitive cube roots of unity.  That is lamba^3 == 1 mod n and
+ * Both lambda and beta are primitive cube roots of unity.  That is lambda^3 == 1 mod n and
  * beta^3 == 1 mod p, where n is the curve order and p is the field order.
  *
  * Furthermore, because (X^3 - 1) = (X - 1)(X^2 + X + 1), the primitive cube roots of unity are
- * roots of X^2 + X + 1.  Therefore lambda^2 + lamba == -1 mod n and beta^2 + beta == -1 mod p.
+ * roots of X^2 + X + 1.  Therefore lambda^2 + lambda == -1 mod n and beta^2 + beta == -1 mod p.
  * (The other primitive cube roots of unity are lambda^2 and beta^2 respectively.)
  *
  * Let l = -1/2 + i*sqrt(3)/2, the complex root of X^2 + X + 1. We can define a ring

src/secp256k1/src/secp256k1.c

@@ -71,8 +71,8 @@ static const secp256k1_context secp256k1_context_static_ = {
     { secp256k1_default_error_callback_fn, 0 },
     0
 };
-const secp256k1_context *secp256k1_context_static = &secp256k1_context_static_;
-const secp256k1_context *secp256k1_context_no_precomp = &secp256k1_context_static_;
+const secp256k1_context * const secp256k1_context_static = &secp256k1_context_static_;
+const secp256k1_context * const secp256k1_context_no_precomp = &secp256k1_context_static_;
 
 /* Helper function that determines if a context is proper, i.e., is not the static context or a copy thereof.
  *
@@ -280,7 +280,7 @@ int secp256k1_ec_pubkey_serialize(const secp256k1_context* ctx, unsigned char *o
     ARG_CHECK(pubkey != NULL);
     ARG_CHECK((flags & SECP256K1_FLAGS_TYPE_MASK) == SECP256K1_FLAGS_TYPE_COMPRESSION);
     if (secp256k1_pubkey_load(ctx, &Q, pubkey)) {
-        ret = secp256k1_eckey_pubkey_serialize(&Q, output, &len, flags & SECP256K1_FLAGS_BIT_COMPRESSION);
+        ret = secp256k1_eckey_pubkey_serialize(&Q, output, &len, !!(flags & SECP256K1_FLAGS_BIT_COMPRESSION));
         if (ret) {
             *outputlen = len;
         }
@@ -634,10 +634,6 @@ int secp256k1_ec_seckey_negate(const secp256k1_context* ctx, unsigned char *seck
     return ret;
 }
 
-int secp256k1_ec_privkey_negate(const secp256k1_context* ctx, unsigned char *seckey) {
-    return secp256k1_ec_seckey_negate(ctx, seckey);
-}
-
 int secp256k1_ec_pubkey_negate(const secp256k1_context* ctx, secp256k1_pubkey *pubkey) {
     int ret = 0;
     secp256k1_ge p;
@@ -681,10 +677,6 @@ int secp256k1_ec_seckey_tweak_add(const secp256k1_context* ctx, unsigned char *s
     return ret;
 }
 
-int secp256k1_ec_privkey_tweak_add(const secp256k1_context* ctx, unsigned char *seckey, const unsigned char *tweak32) {
-    return secp256k1_ec_seckey_tweak_add(ctx, seckey, tweak32);
-}
-
 static int secp256k1_ec_pubkey_tweak_add_helper(secp256k1_ge *p, const unsigned char *tweak32) {
     secp256k1_scalar term;
     int overflow = 0;
@@ -729,10 +721,6 @@ int secp256k1_ec_seckey_tweak_mul(const secp256k1_context* ctx, unsigned char *s
     return ret;
 }
 
-int secp256k1_ec_privkey_tweak_mul(const secp256k1_context* ctx, unsigned char *seckey, const unsigned char *tweak32) {
-    return secp256k1_ec_seckey_tweak_mul(ctx, seckey, tweak32);
-}
-
 int secp256k1_ec_pubkey_tweak_mul(const secp256k1_context* ctx, secp256k1_pubkey *pubkey, const unsigned char *tweak32) {
     secp256k1_ge p;
     secp256k1_scalar factor;

src/secp256k1/src/tests.c

@@ -87,15 +87,6 @@ static void counting_callback_fn(const char* str, void* data) {
     (*p)++;
 }
 
-static void uncounting_illegal_callback_fn(const char* str, void* data) {
-    /* Dummy callback function that just counts (backwards). */
-    int32_t *p;
-    (void)str;
-    p = data;
-    CHECK(*p != INT32_MIN);
-    (*p)--;
-}
-
 static void run_xoshiro256pp_tests(void) {
     {
         size_t i;
@@ -3821,14 +3812,38 @@ static void test_ge(void) {
 
     /* Test batch gej -> ge conversion without known z ratios. */
     {
+        secp256k1_ge *ge_set_all_var = (secp256k1_ge *)checked_malloc(&CTX->error_callback, (4 * runs + 1) * sizeof(secp256k1_ge));
         secp256k1_ge *ge_set_all = (secp256k1_ge *)checked_malloc(&CTX->error_callback, (4 * runs + 1) * sizeof(secp256k1_ge));
-        secp256k1_ge_set_all_gej_var(ge_set_all, gej, 4 * runs + 1);
+        secp256k1_ge_set_all_gej_var(&ge_set_all_var[0], &gej[0], 4 * runs + 1);
         for (i = 0; i < 4 * runs + 1; i++) {
             secp256k1_fe s;
             testutil_random_fe_non_zero(&s);
             secp256k1_gej_rescale(&gej[i], &s);
-            CHECK(secp256k1_gej_eq_ge_var(&gej[i], &ge_set_all[i]));
+            CHECK(secp256k1_gej_eq_ge_var(&gej[i], &ge_set_all_var[i]));
         }
+
+        /* Skip infinity at &gej[0]. */
+        secp256k1_ge_set_all_gej(&ge_set_all[1], &gej[1], 4 * runs);
+        for (i = 1; i < 4 * runs + 1; i++) {
+            secp256k1_fe s;
+            testutil_random_fe_non_zero(&s);
+            secp256k1_gej_rescale(&gej[i], &s);
+            CHECK(secp256k1_gej_eq_ge_var(&gej[i], &ge_set_all[i]));
+            CHECK(secp256k1_ge_eq_var(&ge_set_all_var[i], &ge_set_all[i]));
+        }
+
+        /* Test with an array of length 1. */
+        secp256k1_ge_set_all_gej_var(ge_set_all_var, &gej[1], 1);
+        secp256k1_ge_set_all_gej(ge_set_all, &gej[1], 1);
+        CHECK(secp256k1_gej_eq_ge_var(&gej[1], &ge_set_all_var[1]));
+        CHECK(secp256k1_gej_eq_ge_var(&gej[1], &ge_set_all[1]));
+        CHECK(secp256k1_ge_eq_var(&ge_set_all_var[1], &ge_set_all[1]));
+
+        /* Test with an array of length 0. */
+        secp256k1_ge_set_all_gej_var(NULL, NULL, 0);
+        secp256k1_ge_set_all_gej(NULL, NULL, 0);
+
+        free(ge_set_all_var);
         free(ge_set_all);
     }
 
@@ -6248,11 +6263,6 @@ static void run_eckey_negate_test(void) {
     CHECK(secp256k1_ec_seckey_negate(CTX, seckey) == 1);
     CHECK(secp256k1_memcmp_var(seckey, seckey_tmp, 32) == 0);
 
-    /* Check that privkey alias gives same result */
-    CHECK(secp256k1_ec_seckey_negate(CTX, seckey) == 1);
-    CHECK(secp256k1_ec_privkey_negate(CTX, seckey_tmp) == 1);
-    CHECK(secp256k1_memcmp_var(seckey, seckey_tmp, 32) == 0);
-
     /* Negating all 0s fails */
     memset(seckey, 0, 32);
     memset(seckey_tmp, 0, 32);
@@ -6413,22 +6423,15 @@ static void test_ecdsa_end_to_end(void) {
     if (testrand_int(3) == 0) {
         int ret1;
         int ret2;
-        int ret3;
         unsigned char rnd[32];
-        unsigned char privkey_tmp[32];
         secp256k1_pubkey pubkey2;
         testrand256_test(rnd);
-        memcpy(privkey_tmp, privkey, 32);
         ret1 = secp256k1_ec_seckey_tweak_add(CTX, privkey, rnd);
         ret2 = secp256k1_ec_pubkey_tweak_add(CTX, &pubkey, rnd);
-        /* Check that privkey alias gives same result */
-        ret3 = secp256k1_ec_privkey_tweak_add(CTX, privkey_tmp, rnd);
         CHECK(ret1 == ret2);
-        CHECK(ret2 == ret3);
         if (ret1 == 0) {
             return;
         }
-        CHECK(secp256k1_memcmp_var(privkey, privkey_tmp, 32) == 0);
         CHECK(secp256k1_ec_pubkey_create(CTX, &pubkey2, privkey) == 1);
         CHECK(secp256k1_memcmp_var(&pubkey, &pubkey2, sizeof(pubkey)) == 0);
     }
@@ -6437,22 +6440,15 @@ static void test_ecdsa_end_to_end(void) {
     if (testrand_int(3) == 0) {
         int ret1;
         int ret2;
-        int ret3;
         unsigned char rnd[32];
-        unsigned char privkey_tmp[32];
         secp256k1_pubkey pubkey2;
         testrand256_test(rnd);
-        memcpy(privkey_tmp, privkey, 32);
         ret1 = secp256k1_ec_seckey_tweak_mul(CTX, privkey, rnd);
         ret2 = secp256k1_ec_pubkey_tweak_mul(CTX, &pubkey, rnd);
-        /* Check that privkey alias gives same result */
-        ret3 = secp256k1_ec_privkey_tweak_mul(CTX, privkey_tmp, rnd);
         CHECK(ret1 == ret2);
-        CHECK(ret2 == ret3);
         if (ret1 == 0) {
             return;
         }
-        CHECK(secp256k1_memcmp_var(privkey, privkey_tmp, 32) == 0);
         CHECK(secp256k1_ec_pubkey_create(CTX, &pubkey2, privkey) == 1);
         CHECK(secp256k1_memcmp_var(&pubkey, &pubkey2, sizeof(pubkey)) == 0);
     }
@@ -7837,5 +7833,5 @@ int main(int argc, char **argv) {
     testrand_finish();
 
     printf("no problems found\n");
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/src/tests_exhaustive.c

@@ -383,7 +383,7 @@ int main(int argc, char** argv) {
         this_core = strtol(argv[4], NULL, 0);
         if (num_cores < 1 || this_core >= num_cores) {
             fprintf(stderr, "Usage: %s [count] [seed] [numcores] [thiscore]\n", argv[0]);
-            return 1;
+            return EXIT_FAILURE;
         }
         printf("running tests for core %lu (out of [0..%lu])\n", (unsigned long)this_core, (unsigned long)num_cores - 1);
     }
@@ -462,5 +462,5 @@ int main(int argc, char** argv) {
     testrand_finish();
 
     printf("no problems found\n");
-    return 0;
+    return EXIT_SUCCESS;
 }

src/secp256k1/src/util.h

@@ -232,7 +232,7 @@ static SECP256K1_INLINE void secp256k1_memclear(void *ptr, size_t len) {
      *    As best as we can tell, this is sufficient to break any optimisations that
      *    might try to eliminate "superfluous" memsets.
      * This method is used in memzero_explicit() the Linux kernel, too. Its advantage is that it
-     * is pretty efficient, because the compiler can still implement the memset() efficently,
+     * is pretty efficient, because the compiler can still implement the memset() efficiently,
      * just not remove it entirely. See "Dead Store Elimination (Still) Considered Harmful" by
      * Yang et al. (USENIX Security 2017) for more background.
      */

src/secp256k1/src/util_local_visibility.h

@@ -0,0 +1,12 @@
+#ifndef SECP256K1_LOCAL_VISIBILITY_H
+#define SECP256K1_LOCAL_VISIBILITY_H
+
+/* Global variable visibility */
+/* See: https://github.com/bitcoin-core/secp256k1/issues/1181 */
+#if !defined(_WIN32) && defined(__GNUC__) && (__GNUC__ >= 4)
+# define SECP256K1_LOCAL_VAR extern __attribute__ ((visibility ("hidden")))
+#else
+# define SECP256K1_LOCAL_VAR extern
+#endif
+
+#endif /* SECP256K1_LOCAL_VISIBILITY_H */

src/secp256k1/src/wycheproof/WYCHEPROOF_COPYING

@@ -3,9 +3,18 @@
   `b063b4aedae951c69df014cd25fa6d69ae9e8cb9`, see
   https://github.com/google/wycheproof/blob/b063b4aedae951c69df014cd25fa6d69ae9e8cb9/testvectors_v1/ecdsa_secp256k1_sha256_bitcoin_test.json
 
+* The file `ecdh_secp256k1_test.json` in this directory
+  comes from Google's project Wycheproof with git commit
+  `d9f6ec7d8bd8c96da05368999094e4a75ba5cb3d`, see
+  https://github.com/google/wycheproof/blob/d9f6ec7d8bd8c96da05368999094e4a75ba5cb3d/testvectors_v1/ecdh_secp256k1_test.json
+
 * The file `ecdsa_secp256k1_sha256_bitcoin_test.h` is generated from
   `ecdsa_secp256k1_sha256_bitcoin_test.json` using the script
-  `tests_wycheproof_generate.py`.
+  `tests_wycheproof_generate_ecdsa.py`.
+
+* The file `ecdh_secp256k1_test.h` is generated from
+  `ecdh_secp256k1_test.json` using the script
+  `tests_wycheproof_generate_ecdh.py`.
 
 -------------------------------------------------------------------------------
 

src/secp256k1/src/wycheproof/ecdsa_secp256k1_sha256_bitcoin_test.h

@@ -1,4 +1,4 @@
-/* Note: this file was autogenerated using tests_wycheproof_generate.py. Do not edit. */
+/* Note: this file was autogenerated using tests_wycheproof_generate_ecdsa.py. Do not edit. */
 #define SECP256K1_ECDSA_WYCHEPROOF_NUMBER_TESTVECTORS (463)
 
 typedef struct {

src/secp256k1/tools/symbol-check.py

@@ -0,0 +1,72 @@
+#!/usr/bin/env python3
+"""Check that a libsecp256k1 shared library exports only expected symbols.
+
+Usage examples:
+  - When building with Autotools:
+    ./tools/symbol-check.py .libs/libsecp256k1.so
+    ./tools/symbol-check.py .libs/libsecp256k1-<V>.dll
+    ./tools/symbol-check.py .libs/libsecp256k1.dylib
+
+  - When building with CMake:
+    ./tools/symbol-check.py build/lib/libsecp256k1.so
+    ./tools/symbol-check.py build/bin/libsecp256k1-<V>.dll
+    ./tools/symbol-check.py build/lib/libsecp256k1.dylib"""
+
+import re
+import sys
+import subprocess
+
+import lief
+
+
+class UnexpectedExport(RuntimeError):
+    pass
+
+
+def get_exported_exports(library) -> list[str]:
+    """Adapter function to get exported symbols based on the library format."""
+    if library.format == lief.Binary.FORMATS.ELF:
+        return [symbol.name for symbol in library.exported_symbols]
+    elif library.format == lief.Binary.FORMATS.PE:
+        return [entry.name for entry in library.get_export().entries]
+    elif library.format == lief.Binary.FORMATS.MACHO:
+        return [symbol.name[1:] for symbol in library.exported_symbols]
+    raise NotImplementedError(f"Unsupported format: {library.format}")
+
+
+def grep_expected_symbols() -> list[str]:
+    """Guess the list of expected exported symbols from the source code."""
+    grep_output = subprocess.check_output(
+        ["git", "grep", r"^\s*SECP256K1_API", "--", "include"],
+        universal_newlines=True,
+        encoding="utf-8"
+    )
+    lines = grep_output.split("\n")
+    pattern = re.compile(r'\bsecp256k1_\w+')
+    exported: list[str] = [pattern.findall(line)[-1] for line in lines if line.strip()]
+    return exported
+
+
+def check_symbols(library, expected_exports) -> None:
+    """Check that the library exports only the expected symbols."""
+    actual_exports = get_exported_exports(library)
+    unexpected_exports = set(actual_exports) - set(expected_exports)
+    if unexpected_exports != set():
+        raise UnexpectedExport(f"Unexpected exported symbols: {unexpected_exports}")
+
+def main():
+    if len(sys.argv) != 2:
+        print(__doc__)
+        return 1
+    library = lief.parse(sys.argv[1])
+    expected_exports = grep_expected_symbols()
+    try:
+        check_symbols(library, expected_exports)
+    except UnexpectedExport as e:
+        print(f"{sys.argv[0]}: In {sys.argv[1]}: {e}")
+        return 1
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

src/secp256k1/tools/tests_wycheproof_generate_ecdh.py

@@ -0,0 +1,166 @@
+#!/usr/bin/env python3
+# Copyright (c) 2024 Random "Randy" Lattice and Sean Andersen
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or https://www.opensource.org/licenses/mit-license.php.
+'''
+Generate a C file with ECDH testvectors from the Wycheproof project.
+'''
+
+import json
+import sys
+
+from binascii import hexlify, unhexlify
+from wycheproof_utils import to_c_array
+
+def should_skip_flags(test_vector_flags):
+    # skip these vectors because they are for ASN.1 encoding issues and other curves.
+    # for more details, see https://github.com/bitcoin-core/secp256k1/pull/1492#discussion_r1572491546
+    flags_to_skip = {"InvalidAsn", "WrongCurve"}
+    return any(flag in test_vector_flags for flag in flags_to_skip)
+
+def should_skip_tcid(test_vector_tcid):
+    # We skip some test case IDs that have a public key whose custom ASN.1 representation explicitly
+    # encodes some curve parameters that are invalid. libsecp256k1 never parses this part so we do
+    # not care testing those. See https://github.com/bitcoin-core/secp256k1/pull/1492#discussion_r1572491546
+    tcids_to_skip = [496, 497, 502, 503, 504, 505, 507]
+    return test_vector_tcid in tcids_to_skip
+
+# Rudimentary ASN.1 DER public key parser.
+# This should not be used for anything other than parsing Wycheproof test vectors.
+def parse_der_pk(s):
+    tag = s[0]
+    L = int(s[1])
+    offset = 0
+    if L & 0x80:
+        if L == 0x81:
+            L = int(s[2])
+            offset = 1
+        elif L == 0x82:
+            L = 256 * int(s[2]) + int(s[3])
+            offset = 2
+        else:
+            raise ValueError("invalid L")
+    value = s[(offset + 2):(L + 2 + offset)]
+    rest = s[(L + 2 + offset):]
+
+    if len(rest) > 0 or tag == 0x06: # OBJECT IDENTIFIER
+        return parse_der_pk(rest)
+    if tag == 0x03: # BIT STRING
+        return value
+    if tag == 0x30: # SEQUENCE
+        return parse_der_pk(value)
+    raise ValueError("unknown tag")
+
+def parse_public_key(pk):
+    der_pub_key = parse_der_pk(unhexlify(pk))   # Convert back to str and strip off the `0x`
+    return hexlify(der_pub_key).decode()[2:]
+
+def normalize_private_key(sk):
+    # Ensure the private key is at most 64 characters long, retaining the last 64 if longer.
+    # In the wycheproof test vectors, some private keys have leading zeroes
+    normalized = sk[-64:].zfill(64)
+    if len(normalized) != 64:
+        raise ValueError("private key must be exactly 64 characters long.")
+    return normalized
+
+def normalize_expected_result(er):
+    result_mapping = {"invalid": 0, "valid": 1, "acceptable": 1}
+    return result_mapping[er]
+
+filename_input = sys.argv[1]
+
+with open(filename_input) as f:
+    doc = json.load(f)
+
+num_vectors = 0
+offset_sk_running, offset_pk_running, offset_shared = 0, 0, 0
+test_vectors_out = ""
+private_keys = ""
+shared_secrets = ""
+public_keys = ""
+cache_sks = {}
+cache_public_keys = {}
+
+for group in doc['testGroups']:
+    assert group["type"] == "EcdhTest"
+    assert group["curve"] == "secp256k1"
+    for test_vector in group['tests']:
+        if should_skip_flags(test_vector['flags']) or should_skip_tcid(test_vector['tcId']):
+            continue
+
+        public_key = parse_public_key(test_vector['public'])
+        private_key = normalize_private_key(test_vector['private'])
+        expected_result = normalize_expected_result(test_vector['result'])
+
+        # // 2 to convert hex to byte length
+        shared_size = len(test_vector['shared']) // 2
+        sk_size = len(private_key) // 2
+        pk_size = len(public_key) // 2
+
+        new_sk = False
+        sk = to_c_array(private_key)
+        sk_offset = offset_sk_running
+
+        # check for repeated sk
+        if sk not in cache_sks:
+            if num_vectors != 0 and sk_size != 0:
+                private_keys += ",\n  "
+            cache_sks[sk] = offset_sk_running
+            private_keys += sk
+            new_sk = True
+        else:
+            sk_offset = cache_sks[sk]
+
+        new_pk = False
+        pk = to_c_array(public_key) if public_key != '0x' else ''
+
+        pk_offset = offset_pk_running
+        # check for repeated pk
+        if pk not in cache_public_keys:
+            if num_vectors != 0 and len(pk) != 0:
+                public_keys += ",\n  "
+            cache_public_keys[pk] = offset_pk_running
+            public_keys += pk
+            new_pk = True
+        else:
+            pk_offset = cache_public_keys[pk]
+
+
+        shared_secrets += ",\n  " if num_vectors and shared_size else ""
+        shared_secrets += to_c_array(test_vector['shared'])
+        wycheproof_tcid = test_vector['tcId']
+
+        test_vectors_out += "  /" + "* tcId: " + str(test_vector['tcId']) + ". " + test_vector['comment'] + " *" + "/\n"
+        test_vectors_out += f"  {{{pk_offset}, {pk_size}, {sk_offset}, {sk_size}, {offset_shared}, {shared_size}, {expected_result}, {wycheproof_tcid} }},\n"
+        if new_sk:
+            offset_sk_running += sk_size
+        if new_pk:
+            offset_pk_running += pk_size
+        offset_shared += shared_size
+        num_vectors += 1
+
+struct_definition = """
+typedef struct {
+    size_t pk_offset;
+    size_t pk_len;
+    size_t sk_offset;
+    size_t sk_len;
+    size_t shared_offset;
+    size_t shared_len;
+    int expected_result;
+    int wycheproof_tcid;
+} wycheproof_ecdh_testvector;
+"""
+
+print("/* Note: this file was autogenerated using tests_wycheproof_ecdh.py. Do not edit. */")
+print(f"#define SECP256K1_ECDH_WYCHEPROOF_NUMBER_TESTVECTORS ({num_vectors})")
+
+print(struct_definition)
+
+print("static const unsigned char wycheproof_ecdh_private_keys[]    = { " + private_keys + "};\n")
+print("static const unsigned char wycheproof_ecdh_public_keys[] = { " + public_keys + "};\n")
+print("static const unsigned char wycheproof_ecdh_shared_secrets[]  = { " + shared_secrets + "};\n")
+
+print("static const wycheproof_ecdh_testvector testvectors[SECP256K1_ECDH_WYCHEPROOF_NUMBER_TESTVECTORS] = {")
+print(test_vectors_out)
+print("};")

src/secp256k1/tools/tests_wycheproof_generate_ecdsa.py

@@ -9,6 +9,8 @@ Generate a C file with ECDSA testvectors from the Wycheproof project.
 import json
 import sys
 
+from wycheproof_utils import to_c_array
+
 filename_input = sys.argv[1]
 
 with open(filename_input) as f:
@@ -16,12 +18,6 @@ with open(filename_input) as f:
 
 num_groups = len(doc['testGroups'])
 
-def to_c_array(x):
-    if x == "":
-        return ""
-    s = ',0x'.join(a+b for a,b in zip(x[::2], x[1::2]))
-    return "0x" + s
-
 
 num_vectors = 0
 offset_msg_running, offset_pk_running, offset_sig = 0, 0, 0
@@ -101,7 +97,7 @@ typedef struct {
 """
 
 
-print("/* Note: this file was autogenerated using tests_wycheproof_generate.py. Do not edit. */")
+print("/* Note: this file was autogenerated using tests_wycheproof_generate_ecdsa.py. Do not edit. */")
 print(f"#define SECP256K1_ECDSA_WYCHEPROOF_NUMBER_TESTVECTORS ({num_vectors})")
 
 print(struct_definition)

src/secp256k1/tools/wycheproof_utils.py

@@ -0,0 +1,12 @@
+# Copyright (c) 2024 Random "Randy" Lattice and Sean Andersen
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or https://www.opensource.org/licenses/mit-license.php.
+'''
+Utility functions for generating C files for testvectors from the Wycheproof project.
+'''
+
+def to_c_array(x):
+    if x == "":
+        return ""
+    s = ',0x'.join(a + b for a, b in zip(x[::2], x[1::2]))
+    return "0x" + s