Add ellswift usage example #1551
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This should hopefully be useful as orientation for users implementing the key exchange part of BIP324. Conceptually the example is not very different to the ECDH one, so a lot of code/comments are just copied (e.g. context creation, secret key generation, shared secret comparison, console output, cleanup with secret key clearing).
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@real-or-random: Thanks for the quick review, force-pushed with all the suggestions taken. |
hebasto
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Jun 25, 2024
| @@ -10,6 +10,7 @@ ctime_tests | |||
| ecdh_example | |||
| ecdsa_example | |||
| schnorr_example | |||
| ellswift_example | |||
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nit: I understand that this doesn’t adhere to the surrounding code, but, strictly speaking, it should be
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| ellswift_example | |
| /ellswift_example |
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Yeah, feel free to adjust this for the binaries, but I guess either variant is fine (we also have the pattern *.exe, which may in rare cases a bit too coarse`...)
jonasnick
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Jul 10, 2024
josibake
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0c63b8b191 automagically regenerate if testvectors change a61335f2e5 ci: enable silentpayments module 0b6827182d tests: add BIP-352 test vectors 1858c33c55 silentpayments: add benchmark for `scan_outputs` 816796300a silentpayments: add examples/silentpayments.c c1f85840dc silentpayments: receiving 2fb3ca6efe silentpayments: recipient label support 605096d3f4 silentpayments: sending 35f91359b8 build: add skeleton for new silentpayments (BIP352) module 0055b86780 Merge bitcoin-core/secp256k1#1551: Add ellswift usage example ea2d5f0f17 Merge bitcoin-core/secp256k1#1563: doc: Add convention for defaults ca06e58b2c Merge bitcoin-core/secp256k1#1564: build, ci: Adjust the default size of the precomputed table for signing e2af491263 ci: Switch to the new default value of the precomputed table for signing d94a9273f8 build: Adjust the default size of the precomputed table for signing fcc5d7381b Merge bitcoin-core/secp256k1#1565: cmake: Bump CMake minimum required version up to 3.16 9420eece24 cmake: Bump CMake minimum required version up to 3.16 16685649d2 doc: Add convention for defaults a5269373fa Merge bitcoin-core/secp256k1#1555: Fixed O3 replacement b8fe33332b cmake: Fixed O3 replacement 31f84595c4 Add ellswift usage example fe4fbaa7f3 examples: fix case typos in secret clearing paragraphs (s/, Or/, or/) git-subtree-dir: src/secp256k1 git-subtree-split: 0c63b8b1911ef1183f411a5e232165b543c668ea
josibake
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00b0cb19a9 docs: update README 54b8bc8ec6 ci: enable silentpayments module 96bd71fb8a tests: add BIP-352 test vectors c30bc013fe silentpayments: add benchmark for `scan_outputs` 91b1b3365b silentpayments: add examples/silentpayments.c b4475ea80c silentpayments: receiving 23c7aead63 silentpayments: recipient label support 79562d0cd1 silentpayments: sending 35f91359b8 build: add skeleton for new silentpayments (BIP352) module 0055b86780 Merge bitcoin-core/secp256k1#1551: Add ellswift usage example ea2d5f0f17 Merge bitcoin-core/secp256k1#1563: doc: Add convention for defaults ca06e58b2c Merge bitcoin-core/secp256k1#1564: build, ci: Adjust the default size of the precomputed table for signing e2af491263 ci: Switch to the new default value of the precomputed table for signing d94a9273f8 build: Adjust the default size of the precomputed table for signing fcc5d7381b Merge bitcoin-core/secp256k1#1565: cmake: Bump CMake minimum required version up to 3.16 9420eece24 cmake: Bump CMake minimum required version up to 3.16 16685649d2 doc: Add convention for defaults a5269373fa Merge bitcoin-core/secp256k1#1555: Fixed O3 replacement b8fe33332b cmake: Fixed O3 replacement 31f84595c4 Add ellswift usage example fe4fbaa7f3 examples: fix case typos in secret clearing paragraphs (s/, Or/, or/) git-subtree-dir: src/secp256k1 git-subtree-split: 00b0cb19a97718dfaab70aa7505ff157f22a31bd
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642c885b61 Merge bitcoin-core/secp256k1#1575: release: prepare for 0.5.1 cdf08c1a2b Merge bitcoin-core/secp256k1#1576: doc: mention `needs-changelog` github label in release process 40d87b8e45 release: prepare for 0.5.1 5770226176 changelog: clarify CMake option 759bd4bbc8 doc: mention `needs-changelog` github label in release process fded437c4c Merge bitcoin-core/secp256k1#1574: Fix compilation when extrakeys module isn't enabled 763d938cf0 ci: only enable extrakeys module when schnorrsig is enabled af551ab9db tests: do not use functions from extrakeys module 0055b86780 Merge bitcoin-core/secp256k1#1551: Add ellswift usage example ea2d5f0f17 Merge bitcoin-core/secp256k1#1563: doc: Add convention for defaults ca06e58b2c Merge bitcoin-core/secp256k1#1564: build, ci: Adjust the default size of the precomputed table for signing e2af491263 ci: Switch to the new default value of the precomputed table for signing d94a9273f8 build: Adjust the default size of the precomputed table for signing fcc5d7381b Merge bitcoin-core/secp256k1#1565: cmake: Bump CMake minimum required version up to 3.16 9420eece24 cmake: Bump CMake minimum required version up to 3.16 16685649d2 doc: Add convention for defaults a5269373fa Merge bitcoin-core/secp256k1#1555: Fixed O3 replacement b8fe33332b cmake: Fixed O3 replacement 31f84595c4 Add ellswift usage example fe4fbaa7f3 examples: fix case typos in secret clearing paragraphs (s/, Or/, or/) git-subtree-dir: src/secp256k1 git-subtree-split: 642c885b6102725e25623738529895a95addc4f4
fanquake
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Aug 6, 2024
9ec776a Revert "build: pass --with-ecmult-gen-kb=86 to secp256k1" (fanquake) 41797f8 Squashed 'src/secp256k1/' changes from 4af241b320..642c885b61 (fanquake) Pull request description: Updates the libsecp256k1 subtree to bitcoin-core/secp256k1@642c885 (which is the tag for the [`v0.5.1` release](https://github.com/bitcoin-core/secp256k1/releases/tag/v0.5.1)). Includes a handful of changes: * bitcoin-core/secp256k1#1551 * bitcoin-core/secp256k1#1555 * bitcoin-core/secp256k1#1563 * bitcoin-core/secp256k1#1564 * bitcoin-core/secp256k1#1565 * bitcoin-core/secp256k1#1574 Reverts a057869 given secps default has changed (bitcoin-core/secp256k1#1563): > As a rule of thumb, the default values for configuration options should target standard desktop machines and align with Bitcoin Core's defaults, and the tests should mostly exercise the default configuration (see [#1549](bitcoin-core/secp256k1#1549 (comment))). ACKs for top commit: hebasto: ACK 9ec776a, I've reproduced the subtree update locally with the zero diff with this PR branch. Tree-SHA512: 903ca0ff12dcc32b6cd86aee84e19de09803d35a1ee006ce890f3761dd27f1e96fe70c7bb4c279416a96ee57c406c9627614900f0ca6f76674c0088a3d270cd2
vmta
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3fdf146ba Merge bitcoin-core/secp256k1#1578: ci: Silent Homebrew's noisy reinstall warnings f8c1b0e0e Merge bitcoin-core/secp256k1#1577: release cleanup: bump version after 0.5.1 7057d3c9a ci: Silent Homebrew's noisy reinstall warnings c3e40d75d release cleanup: bump version after 0.5.1 642c885b6 Merge bitcoin-core/secp256k1#1575: release: prepare for 0.5.1 cdf08c1a2 Merge bitcoin-core/secp256k1#1576: doc: mention `needs-changelog` github label in release process 40d87b8e4 release: prepare for 0.5.1 577022617 changelog: clarify CMake option 759bd4bbc doc: mention `needs-changelog` github label in release process fded437c4 Merge bitcoin-core/secp256k1#1574: Fix compilation when extrakeys module isn't enabled 763d938cf ci: only enable extrakeys module when schnorrsig is enabled af551ab9d tests: do not use functions from extrakeys module 0055b8678 Merge bitcoin-core/secp256k1#1551: Add ellswift usage example ea2d5f0f1 Merge bitcoin-core/secp256k1#1563: doc: Add convention for defaults ca06e58b2 Merge bitcoin-core/secp256k1#1564: build, ci: Adjust the default size of the precomputed table for signing e2af49126 ci: Switch to the new default value of the precomputed table for signing d94a9273f build: Adjust the default size of the precomputed table for signing fcc5d7381 Merge bitcoin-core/secp256k1#1565: cmake: Bump CMake minimum required version up to 3.16 9420eece2 cmake: Bump CMake minimum required version up to 3.16 16685649d doc: Add convention for defaults 31f84595c Add ellswift usage example fe4fbaa7f examples: fix case typos in secret clearing paragraphs (s/, Or/, or/) git-subtree-dir: src/secp256k1 git-subtree-split: 3fdf146bad042a17f6b2f490ef8bd9d8e774cdbd
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3fdf146ba Merge bitcoin-core/secp256k1#1578: ci: Silent Homebrew's noisy reinstall warnings f8c1b0e0e Merge bitcoin-core/secp256k1#1577: release cleanup: bump version after 0.5.1 7057d3c9a ci: Silent Homebrew's noisy reinstall warnings c3e40d75d release cleanup: bump version after 0.5.1 642c885b6 Merge bitcoin-core/secp256k1#1575: release: prepare for 0.5.1 cdf08c1a2 Merge bitcoin-core/secp256k1#1576: doc: mention `needs-changelog` github label in release process 40d87b8e4 release: prepare for 0.5.1 577022617 changelog: clarify CMake option 759bd4bbc doc: mention `needs-changelog` github label in release process fded437c4 Merge bitcoin-core/secp256k1#1574: Fix compilation when extrakeys module isn't enabled 763d938cf ci: only enable extrakeys module when schnorrsig is enabled af551ab9d tests: do not use functions from extrakeys module 0055b8678 Merge bitcoin-core/secp256k1#1551: Add ellswift usage example ea2d5f0f1 Merge bitcoin-core/secp256k1#1563: doc: Add convention for defaults ca06e58b2 Merge bitcoin-core/secp256k1#1564: build, ci: Adjust the default size of the precomputed table for signing e2af49126 ci: Switch to the new default value of the precomputed table for signing d94a9273f build: Adjust the default size of the precomputed table for signing fcc5d7381 Merge bitcoin-core/secp256k1#1565: cmake: Bump CMake minimum required version up to 3.16 9420eece2 cmake: Bump CMake minimum required version up to 3.16 16685649d doc: Add convention for defaults 31f84595c Add ellswift usage example fe4fbaa7f examples: fix case typos in secret clearing paragraphs (s/, Or/, or/) git-subtree-dir: src/secp256k1 git-subtree-split: 3fdf146bad042a17f6b2f490ef8bd9d8e774cdbd
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c232486 Revert "cmake: Set `ENVIRONMENT` property for examples on Windows" (Hennadii Stepanov) 26e4a7c cmake: Set top-level target output locations (Hennadii Stepanov) Pull request description: While testing #1551, I noticed that when cross-compiling a shared library with examples for Windows, the `ctest` fails to run examples with Wine. Adjusting the `PATH` variable in https://github.com/bitcoin-core/secp256k1/blob/4af241b32099067464e015fa66daac5096206dea/examples/CMakeLists.txt#L16-L18 does not help because `WINEPATH` is expected. Another issue with the current implementation is that the examples cannot run individually on Windows. This PR resolves both issues by reverting the implementation from #1290 in favour of the reworked and improved implementation from #1233. ACKs for top commit: theuni: Concept ACK and utACK c232486. real-or-random: utACK c232486 Tree-SHA512: 479b71d15d5d5670f6f69da3da599240c345711003383ca805c821b67065c9baaf269f987792cf1029211cdbfe799aecd401e6940a471539e3929b4a90e0781d
vmta
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1464f15c8 Merge bitcoin-core/secp256k1#1625: util: Remove unused (u)int64_t formatting macros 980c08df8 util: Remove unused (u)int64_t formatting macros 9b7c59cbb Merge bitcoin-core/secp256k1#1624: ci: Update macOS image 096e3e23f ci: Update macOS image 68b55209f Merge bitcoin-core/secp256k1#1619: musig: ctimetests: fix _declassify range for generated nonce points f0868a9b3 Merge bitcoin-core/secp256k1#1595: build: 45839th attempt to fix symbol visibility on Windows 1fae76f50 Merge bitcoin-core/secp256k1#1620: Remove unused scratch space from API 8be3839fb Remove unused scratch space from API 57eda3ba3 musig: ctimetests: fix _declassify range for generated nonce points e59158b6e Merge bitcoin-core/secp256k1#1553: cmake: Set top-level target output locations 18f9b967c Merge bitcoin-core/secp256k1#1616: examples: do not retry generating seckey randomness in musig 5bab8f6d3 examples: make key generation doc consistent e8908221a examples: do not retry generating seckey randomness in musig 70b6be183 extrakeys: improve doc of keypair_create (don't suggest retry) 01b589338 Merge bitcoin-core/secp256k1#1599: #1570 improve examples: remove key generation loop cd4f84f3b Improve examples/documentation: remove key generation loops a88aa9350 Merge bitcoin-core/secp256k1#1603: f can never equal -m 3660fe5e2 Merge bitcoin-core/secp256k1#1479: Add module "musig" that implements MuSig2 multi-signatures (BIP 327) 168c92011 build: allow enabling the musig module in cmake f411841a4 Add module "musig" that implements MuSig2 multi-signatures (BIP 327) 0be79660f util: add constant-time is_zero_array function c8fbdb1b9 group: add ge_to_bytes_ext and ge_from_bytes_ext ef7ff0340 f can never equal -m c232486d8 Revert "cmake: Set `ENVIRONMENT` property for examples on Windows" 26e4a7c21 cmake: Set top-level target output locations 4c57c7a5a Merge bitcoin-core/secp256k1#1554: cmake: Clean up testing code 447334cb0 include: Avoid visibility("default") on Windows 472faaa8e Merge bitcoin-core/secp256k1#1604: doc: fix typos in `secp256k1_ecdsa_{recoverable_,}signature` API description 292310fbb doc: fix typos in `secp256k1_ecdsa_{recoverable_,}signature` API description 2f2ccc469 Merge bitcoin-core/secp256k1#1600: cmake: Introduce `SECP256K1_APPEND_LDFLAGS` variable 421ed1b46 cmake: Introduce `SECP256K1_APPEND_LDFLAGS` variable 85e224dd9 group: add ge_to_bytes and ge_from_bytes 198885507 Merge bitcoin-core/secp256k1#1586: fix: remove duplicate 'the' from header file comment b30761440 Merge bitcoin-core/secp256k1#1583: ci: Bump GCC_SNAPSHOT_MAJOR to 15 fa67b6752 refactor: Use array initialization for unterminated strings 9b0f37bff fix: remove duplicate 'the' from header file comment e34b47673 ci: Bump GCC_SNAPSHOT_MAJOR to 15 3fdf146ba Merge bitcoin-core/secp256k1#1578: ci: Silent Homebrew's noisy reinstall warnings f8c1b0e0e Merge bitcoin-core/secp256k1#1577: release cleanup: bump version after 0.5.1 7057d3c9a ci: Silent Homebrew's noisy reinstall warnings c3e40d75d release cleanup: bump version after 0.5.1 642c885b6 Merge bitcoin-core/secp256k1#1575: release: prepare for 0.5.1 cdf08c1a2 Merge bitcoin-core/secp256k1#1576: doc: mention `needs-changelog` github label in release process 40d87b8e4 release: prepare for 0.5.1 577022617 changelog: clarify CMake option 759bd4bbc doc: mention `needs-changelog` github label in release process fded437c4 Merge bitcoin-core/secp256k1#1574: Fix compilation when extrakeys module isn't enabled 763d938cf ci: only enable extrakeys module when schnorrsig is enabled af551ab9d tests: do not use functions from extrakeys module 0055b8678 Merge bitcoin-core/secp256k1#1551: Add ellswift usage example ea2d5f0f1 Merge bitcoin-core/secp256k1#1563: doc: Add convention for defaults ca06e58b2 Merge bitcoin-core/secp256k1#1564: build, ci: Adjust the default size of the precomputed table for signing e2af49126 ci: Switch to the new default value of the precomputed table for signing d94a9273f build: Adjust the default size of the precomputed table for signing fcc5d7381 Merge bitcoin-core/secp256k1#1565: cmake: Bump CMake minimum required version up to 3.16 9420eece2 cmake: Bump CMake minimum required version up to 3.16 16685649d doc: Add convention for defaults a5269373f Merge bitcoin-core/secp256k1#1555: Fixed O3 replacement b8fe33332 cmake: Fixed O3 replacement 7c987ec89 cmake: Call `enable_testing()` unconditionally 6aa576515 cmake: Delete `CTest` module 31f84595c Add ellswift usage example fe4fbaa7f examples: fix case typos in secret clearing paragraphs (s/, Or/, or/) 4af241b32 Merge bitcoin-core/secp256k1#1535: build: Replace hardcoded "auto" value with default one f473c959f Merge bitcoin-core/secp256k1#1543: cmake: Do not modify build types when integrating by downstream project d403eea48 Merge bitcoin-core/secp256k1#1546: cmake: Rename `SECP256K1_LATE_CFLAGS` and switch to Bitcoin Core's approach d7ae25ce6 Merge bitcoin-core/secp256k1#1550: fix: typos in secp256k1.c 0e2fadb20 fix: typos in secp256k1.c 69b2192ad Merge bitcoin-core/secp256k1#1545: cmake: Do not set `CTEST_TEST_TARGET_ALIAS` 5dd637f3c Merge bitcoin-core/secp256k1#1548: README: mention ellswift module 7454a5373 README: mention ellswift module 4706be2cd cmake: Reimplement `SECP256K1_APPEND_CFLAGS` using Bitcoin Core approach c2764dbb9 cmake: Rename `SECP256K1_LATE_CFLAGS` to `SECP256K1_APPEND_CFLAGS` f87a3589f cmake: Do not set `CTEST_TEST_TARGET_ALIAS` 158f9e5ea cmake: Do not modify build types when integrating by downstream project 35c0fdc86 Merge bitcoin-core/secp256k1#1529: cmake: Fix cache issue when integrating by downstream project 4392f0f71 Merge bitcoin-core/secp256k1#1533: tests: refactor: tidy up util functions (#1491) bedffd53d Merge bitcoin-core/secp256k1#1488: ci: Add native macOS arm64 job 4b8d5eeac Merge bitcoin-core/secp256k1#1532: cmake: Disable eager MSan in ctime_tests f55703ba4 autotools: Delete unneeded compiler test 396e88588 autotools: Align MSan checking code with CMake's implementation abde59f52 cmake: Report more compiler details in summary 7abf979a4 cmake: Disable `ctime_tests` if build with `-fsanitize=memory` 4d9645bee cmake: Remove "AUTO" value of `SECP256K1_ECMULT_GEN_KB` option a06805ee7 cmake: Remove "AUTO" value of `SECP256K1_ECMULT_WINDOW_SIZE` option 1791f6fce Merge bitcoin-core/secp256k1#1517: autotools: Disable eager MSan in ctime_tests 26b94ee92 autotools: Remove "auto" value of `--with-ecmult-gen-kb` option 122dbaeb3 autotools: Remove "auto" value of `--with-ecmult-window` option e73f6f8fd tests: refactor: drop `secp256k1_` prefix from testrand.h functions 0ee7453a9 tests: refactor: add `testutil_` prefix to testutil.h functions 0c6bc76dc tests: refactor: move `random_` helpers from tests.c to testutil.h 0fef8479b tests: refactor: rename `random_field_element_magnitude` -> `random_fe_magnitude` 59db007f0 tests: refactor: rename `random_group_element_...` -> `random_ge_...` ebfb82ee2 ci: Add job with -fsanitize-memory-param-retval e1bef0961 configure: Move "experimental" warning to bottom 55e5d975d autotools: Disable eager MSan in ctime_tests 06bff6dec Merge bitcoin-core/secp256k1#1528: tests: call `secp256k1_ecmult_multi_var` with a non-`NULL` error callback ec4c002fa cmake: Simplify `PROJECT_IS_TOP_LEVEL` emulation cae9a7ad1 cmake: Do not set emulated PROJECT_IS_TOP_LEVEL as cache variable 4155e62fc Merge bitcoin-core/secp256k1#1526: cmake: Fix `check_arm32_assembly` when using as subproject 9554362b1 tests: call secp256k1_ecmult_multi_var with a non-NULL error callback 9f4c8cd73 cmake: Fix `check_arm32_assembly` when using as subproject 7712a5306 Merge bitcoin-core/secp256k1#1524: check-abi: explicitly provide public headers 7d0bc0870 Merge bitcoin-core/secp256k1#1525: changelog: Correct 0.5.0 release date d45d9b74b changelog: Correct 0.5.0 release date d7f6613db Merge bitcoin-core/secp256k1#1523: release cleanup: bump version after 0.5.0 2f05e2da4 release cleanup: bump version after 0.5.0 e3a885d42 Merge bitcoin-core/secp256k1#1522: release: prepare for 0.5.0 dd695563e check-abi: explicitly provide public headers c0e4ec3fe release: prepare for 0.5.0 bb528cfb0 Merge bitcoin-core/secp256k1#1518: Add secp256k1_pubkey_sort 7d2591ce1 Add secp256k1_pubkey_sort 218f0cc93 ci: Add native macOS arm64 job git-subtree-dir: src/secp256k1 git-subtree-split: 1464f15c812b00de0f3d397b3cfb67d1f91f6967
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This should hopefully be useful as orientation for users implementing the shared secret derivation part of BIP324. Conceptually the example is not very different to the ECDH one, so a lot of code/comments are just copied (e.g. context creation, secret key generation, shared secret comparison, console output, cleanup with secret key clearing).