Line data Source code
1 : // Copyright (c) 2018-2025 The Dash Core developers
2 : // Distributed under the MIT/X11 software license, see the accompanying
3 : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 :
5 : #include <bls/bls_worker.h>
6 : #include <hash.h>
7 :
8 : #include <util/system.h>
9 :
10 : #include <memory>
11 : #include <ranges>
12 : #include <utility>
13 :
14 : template <typename T>
15 0 : bool VerifyVectorHelper(Span<T> vec)
16 : {
17 0 : std::set<uint256> set;
18 0 : for (const auto& item : vec) {
19 0 : if (!item.IsValid())
20 0 : return false;
21 : // check duplicates
22 0 : if (!set.emplace(item.GetHash()).second) {
23 0 : return false;
24 : }
25 : }
26 0 : return true;
27 0 : }
28 :
29 : // Creates a doneCallback and a future. The doneCallback simply finishes the future
30 : template <typename T>
31 0 : std::pair<std::function<void(const T&)>, std::future<T> > BuildFutureDoneCallback()
32 : {
33 0 : auto p = std::make_shared<std::promise<T> >();
34 0 : std::function<void(const T&)> f = [p](const T& v) {
35 0 : p->set_value(v);
36 0 : };
37 0 : return std::make_pair(std::move(f), p->get_future());
38 0 : }
39 : template <typename T>
40 0 : std::pair<std::function<void(T)>, std::future<T> > BuildFutureDoneCallback2()
41 : {
42 0 : auto p = std::make_shared<std::promise<T> >();
43 0 : std::function<void(const T&)> f = [p](T v) {
44 0 : p->set_value(v);
45 0 : };
46 0 : return std::make_pair(std::move(f), p->get_future());
47 0 : }
48 :
49 :
50 : /////
51 :
52 360 : CBLSWorker::CBLSWorker() = default;
53 :
54 360 : CBLSWorker::~CBLSWorker()
55 180 : {
56 180 : Stop();
57 360 : }
58 :
59 180 : void CBLSWorker::Start(int16_t worker_count)
60 : {
61 180 : assert(worker_count > 0);
62 180 : workerPool.resize(worker_count);
63 180 : RenameThreadPool(workerPool, "bls-work");
64 180 : }
65 :
66 360 : void CBLSWorker::Stop()
67 : {
68 360 : workerPool.clear_queue();
69 360 : workerPool.stop(true);
70 360 : }
71 :
72 0 : bool CBLSWorker::GenerateContributions(int quorumThreshold, Span<CBLSId> ids, BLSVerificationVectorPtr& vvecRet, std::vector<CBLSSecretKey>& skSharesRet)
73 : {
74 0 : auto svec = std::vector<CBLSSecretKey>((size_t)quorumThreshold);
75 0 : vvecRet = std::make_shared<std::vector<CBLSPublicKey>>((size_t)quorumThreshold);
76 0 : skSharesRet.resize(ids.size());
77 :
78 0 : for (int i = 0; i < quorumThreshold; i++) {
79 0 : svec[i].MakeNewKey();
80 0 : }
81 0 : size_t batchSize = 8;
82 0 : std::vector<std::future<bool>> futures;
83 0 : futures.reserve((quorumThreshold / batchSize + ids.size() / batchSize) + 2);
84 :
85 0 : for (size_t i = 0; i < size_t(quorumThreshold); i += batchSize) {
86 0 : size_t start = i;
87 0 : size_t count = std::min(batchSize, quorumThreshold - start);
88 0 : auto f = [&, start, count](int threadId) {
89 0 : for (size_t j = start; j < start + count; j++) {
90 0 : (*vvecRet)[j] = svec[j].GetPublicKey();
91 0 : }
92 0 : return true;
93 : };
94 0 : futures.emplace_back(workerPool.push(f));
95 0 : }
96 :
97 0 : for (size_t i = 0; i < ids.size(); i += batchSize) {
98 0 : size_t start = i;
99 0 : size_t count = std::min(batchSize, ids.size() - start);
100 0 : auto f = [&, start, count](int threadId) {
101 0 : for (size_t j = start; j < start + count; j++) {
102 0 : if (!skSharesRet[j].SecretKeyShare(svec, ids[j])) {
103 0 : return false;
104 : }
105 0 : }
106 0 : return true;
107 0 : };
108 0 : futures.emplace_back(workerPool.push(f));
109 0 : }
110 0 : return std::ranges::all_of(futures, [](auto& f) { return f.get(); });
111 0 : }
112 :
113 : // aggregates a single vector of BLS objects in parallel
114 : // the input vector is split into batches and each batch is aggregated in parallel
115 : // when enough batches are finished to form a new batch, the new batch is queued for further parallel aggregation
116 : // when no more batches can be created from finished batch results, the final aggregated is created and the doneCallback
117 : // called.
118 : // The Aggregator object needs to be created on the heap, and it will delete itself after calling the doneCallback
119 : // The input vector is not copied into the Aggregator but instead a vector of pointers to the original entries from the
120 : // input vector is stored. This means that the input vector must stay alive for the whole lifetime of the Aggregator
121 : template <typename T>
122 : struct Aggregator : public std::enable_shared_from_this<Aggregator<T>> {
123 0 : const size_t BATCH_SIZE{16};
124 : std::shared_ptr<std::vector<const T*> > inputVec;
125 :
126 : bool parallel;
127 : ctpl::thread_pool& workerPool;
128 :
129 : std::mutex m;
130 : // items in the queue are all intermediate aggregation results of finished batches.
131 : // The intermediate results must be deleted by us again (which we do in SyncAggregateAndPushAggQueue)
132 : ctpl::detail::Queue<T*> aggQueue;
133 0 : std::atomic<size_t> aggQueueSize{0};
134 :
135 : // keeps track of currently queued/in-progress batches. If it reaches 0, we are done
136 0 : std::atomic<size_t> waitCount{0};
137 :
138 : using DoneCallback = std::function<void(const T& agg)>;
139 : DoneCallback doneCallback;
140 :
141 : // TP can either be a pointer or a reference
142 : template <typename TP>
143 0 : Aggregator(Span<TP> _inputSpan, bool _parallel,
144 : ctpl::thread_pool& _workerPool,
145 : DoneCallback _doneCallback) :
146 0 : inputVec(std::make_shared<std::vector<const T*>>(_inputSpan.size())),
147 0 : parallel(_parallel),
148 0 : workerPool(_workerPool),
149 0 : doneCallback(std::move(_doneCallback))
150 0 : {
151 0 : for (size_t i = 0; i < _inputSpan.size(); i++) {
152 0 : (*inputVec)[i] = pointer(_inputSpan[i]);
153 0 : }
154 0 : }
155 :
156 0 : const T* pointer(const T& v) { return &v; }
157 0 : const T* pointer(const T* v) { return v; }
158 :
159 : // Starts aggregation.
160 : // If parallel=true, then this will return fast, otherwise this will block until aggregation is done
161 0 : void Start()
162 : {
163 0 : size_t batchCount = (inputVec->size() + BATCH_SIZE - 1) / BATCH_SIZE;
164 :
165 0 : if (!parallel) {
166 0 : if (inputVec->size() == 1) {
167 0 : doneCallback(*(*inputVec)[0]);
168 0 : } else {
169 0 : doneCallback(SyncAggregate(Span{*inputVec}, 0, inputVec->size()));
170 : }
171 0 : return;
172 : }
173 :
174 0 : if (batchCount == 1) {
175 : // just a single batch of work, take a shortcut.
176 0 : auto self(this->shared_from_this());
177 0 : PushWork([this, self](int threadId) {
178 0 : if (inputVec->size() == 1) {
179 0 : doneCallback(*(*inputVec)[0]);
180 0 : } else {
181 0 : doneCallback(SyncAggregate(Span{*inputVec}, 0, inputVec->size()));
182 : }
183 0 : });
184 : return;
185 0 : }
186 :
187 : // increment wait counter as otherwise the first finished async aggregation might signal that we're done
188 0 : IncWait();
189 0 : for (size_t i = 0; i < batchCount; i++) {
190 0 : size_t start = i * BATCH_SIZE;
191 0 : size_t count = std::min(BATCH_SIZE, inputVec->size() - start);
192 0 : AsyncAggregateAndPushAggQueue(inputVec, start, count, false);
193 0 : }
194 : // this will decrement the wait counter and in most cases NOT finish, as async work is still in progress
195 0 : CheckDone();
196 0 : }
197 :
198 0 : void IncWait()
199 : {
200 0 : ++waitCount;
201 0 : }
202 :
203 0 : void CheckDone()
204 : {
205 0 : if (--waitCount == 0) {
206 0 : Finish();
207 0 : }
208 0 : }
209 :
210 0 : void Finish()
211 : {
212 : // All async work is done, but we might have items in the aggQueue which are the results of the async
213 : // work. This is the case when these did not add up to a new batch. In this case, we have to aggregate
214 : // the items into the final result
215 :
216 0 : std::vector<T*> rem(aggQueueSize);
217 0 : for (size_t i = 0; i < rem.size(); i++) {
218 0 : T* p = nullptr;
219 0 : bool s = aggQueue.pop(p);
220 0 : assert(s);
221 0 : rem[i] = p;
222 0 : }
223 :
224 0 : T r;
225 0 : if (rem.size() == 1) {
226 : // just one intermediate result, which is actually the final result
227 0 : r = *rem[0];
228 0 : } else {
229 : // multiple intermediate results left which did not add up to a new batch. aggregate them now
230 0 : r = SyncAggregate(Span{rem}, 0, rem.size());
231 : }
232 :
233 : // all items which are left in the queue are intermediate results, so we must delete them
234 0 : for (size_t i = 0; i < rem.size(); i++) {
235 0 : delete rem[i];
236 0 : }
237 0 : doneCallback(r);
238 0 : }
239 :
240 0 : void AsyncAggregateAndPushAggQueue(const std::shared_ptr<std::vector<const T*>>& vec, size_t start, size_t count, bool del)
241 : {
242 0 : IncWait();
243 0 : auto self(this->shared_from_this());
244 0 : PushWork([self, vec, start, count, del](int threadId){
245 0 : self->SyncAggregateAndPushAggQueue(vec, start, count, del);
246 0 : });
247 0 : }
248 :
249 0 : void SyncAggregateAndPushAggQueue(const std::shared_ptr<std::vector<const T*>>& vec, size_t start, size_t count, bool del)
250 : {
251 : // aggregate vec and push the intermediate result onto the work queue
252 0 : PushAggQueue(SyncAggregate(Span{*vec}, start, count));
253 0 : if (del) {
254 0 : for (size_t i = 0; i < count; i++) {
255 0 : delete (*vec)[start + i];
256 0 : }
257 0 : }
258 0 : CheckDone();
259 0 : }
260 :
261 0 : void PushAggQueue(const T& v)
262 : {
263 0 : auto copyT = new T(v);
264 : try {
265 0 : aggQueue.push(copyT);
266 0 : } catch (...) {
267 0 : delete copyT;
268 0 : throw;
269 0 : }
270 :
271 0 : if (++aggQueueSize >= BATCH_SIZE) {
272 : // we've collected enough intermediate results to form a new batch.
273 0 : std::shared_ptr<std::vector<const T*> > newBatch;
274 : {
275 0 : std::unique_lock<std::mutex> l(m);
276 0 : if (aggQueueSize < BATCH_SIZE) {
277 : // some other worker thread grabbed this batch
278 0 : return;
279 : }
280 0 : newBatch = std::make_shared<std::vector<const T*>>(BATCH_SIZE);
281 : // collect items for new batch
282 0 : for (size_t i = 0; i < BATCH_SIZE; i++) {
283 0 : T* p = nullptr;
284 0 : bool s = aggQueue.pop(p);
285 0 : assert(s);
286 0 : (*newBatch)[i] = p;
287 0 : }
288 0 : aggQueueSize -= BATCH_SIZE;
289 0 : }
290 :
291 : // push new batch to work queue. del=true this time as these items are intermediate results and need to be deleted
292 : // after aggregation is done
293 0 : AsyncAggregateAndPushAggQueue(newBatch, 0, newBatch->size(), true);
294 0 : }
295 0 : }
296 :
297 : template <typename TP>
298 0 : T SyncAggregate(Span<TP> vec, size_t start, size_t count)
299 : {
300 0 : T result = *vec[start];
301 0 : for (size_t j = 1; j < count; j++) {
302 0 : result.AggregateInsecure(*vec[start + j]);
303 0 : }
304 0 : return result;
305 0 : }
306 :
307 : template <typename Callable>
308 0 : void PushWork(Callable&& f)
309 : {
310 0 : workerPool.push(f);
311 0 : }
312 : };
313 :
314 : // Aggregates multiple input vectors into a single output vector
315 : // Inputs are in the following form:
316 : // [
317 : // [a1, b1, c1, d1],
318 : // [a2, b2, c2, d2],
319 : // [a3, b3, c3, d3],
320 : // [a4, b4, c4, d4],
321 : // ]
322 : // The result is in the following form:
323 : // [ a1+a2+a3+a4, b1+b2+b3+b4, c1+c2+c3+c4, d1+d2+d3+d4]
324 : // Same rules for the input vectors apply to the VectorAggregator as for the Aggregator (they must stay alive)
325 : template <typename T>
326 : struct VectorAggregator : public std::enable_shared_from_this<VectorAggregator<T>> {
327 : using AggregatorType = Aggregator<T>;
328 : using VectorType = std::vector<T>;
329 : using VectorPtrType = std::shared_ptr<VectorType>;
330 : using VectorVectorType = Span<VectorPtrType>;
331 : using DoneCallback = std::function<void(const VectorPtrType& agg)>;
332 : DoneCallback doneCallback;
333 :
334 : VectorVectorType vecs;
335 : bool parallel;
336 : ctpl::thread_pool& workerPool;
337 :
338 0 : std::atomic<size_t> doneCount{0};
339 :
340 : VectorPtrType result;
341 : size_t vecSize;
342 :
343 0 : VectorAggregator(VectorVectorType _vecs,
344 : bool _parallel, ctpl::thread_pool& _workerPool,
345 : DoneCallback _doneCallback) :
346 0 : doneCallback(std::move(_doneCallback)),
347 0 : vecs(_vecs),
348 0 : parallel(_parallel),
349 0 : workerPool(_workerPool)
350 0 : {
351 0 : assert(!vecs.empty());
352 0 : vecSize = vecs[0]->size();
353 0 : result = std::make_shared<VectorType>(vecSize);
354 0 : }
355 :
356 0 : void Start()
357 : {
358 0 : for (size_t i = 0; i < vecSize; i++) {
359 0 : std::vector<const T*> tmp(vecs.size());
360 0 : for (size_t j = 0; j < vecs.size(); j++) {
361 0 : tmp[j] = &(*vecs[j])[i];
362 0 : }
363 :
364 0 : auto self(this->shared_from_this());
365 0 : auto aggregator = std::make_shared<AggregatorType>(Span{tmp}, parallel, workerPool, [self, i](const T& agg) {self->CheckDone(agg, i);});
366 0 : aggregator->Start();
367 0 : }
368 0 : }
369 :
370 0 : void CheckDone(const T& agg, size_t idx)
371 : {
372 0 : (*result)[idx] = agg;
373 0 : if (++doneCount == vecSize) {
374 0 : doneCallback(result);
375 0 : }
376 0 : }
377 : };
378 :
379 : // See comment of AsyncVerifyContributionShares for a description on what this does
380 : // Same rules as in Aggregator apply for the inputs
381 : struct ContributionVerifier : public std::enable_shared_from_this<ContributionVerifier> {
382 0 : struct BatchState {
383 : size_t start;
384 : size_t count;
385 :
386 : BLSVerificationVectorPtr vvec;
387 : CBLSSecretKey skShare;
388 :
389 : // starts with 0 and is incremented if either vvec or skShare aggregation finishes. If it reaches 2, we know
390 : // that aggregation for this batch is fully done. We can then start verification.
391 : std::unique_ptr<std::atomic<int> > aggDone;
392 :
393 : // we can't directly update a vector<bool> in parallel
394 : // as vector<bool> is not thread safe (uses bitsets internally)
395 : // so we must use vector<char> temporarily and concatenate/convert
396 : // each batch result into a final vector<bool>
397 : std::vector<char> verifyResults;
398 : };
399 :
400 : CBLSId forId;
401 : Span<BLSVerificationVectorPtr> vvecs;
402 : Span<CBLSSecretKey> skShares;
403 : size_t batchSize;
404 : bool parallel;
405 : bool aggregated;
406 :
407 : ctpl::thread_pool& workerPool;
408 :
409 0 : size_t batchCount{1};
410 : size_t verifyCount;
411 :
412 : std::vector<BatchState> batchStates;
413 0 : std::atomic<size_t> verifyDoneCount{0};
414 : std::function<void(const std::vector<bool>&)> doneCallback;
415 :
416 0 : ContributionVerifier(CBLSId _forId, Span<BLSVerificationVectorPtr> _vvecs,
417 : Span<CBLSSecretKey> _skShares, size_t _batchSize,
418 : bool _parallel, bool _aggregated, ctpl::thread_pool& _workerPool,
419 : std::function<void(const std::vector<bool>&)> _doneCallback) :
420 0 : forId(std::move(_forId)),
421 0 : vvecs(_vvecs),
422 0 : skShares(_skShares),
423 0 : batchSize(_batchSize),
424 0 : parallel(_parallel),
425 0 : aggregated(_aggregated),
426 0 : workerPool(_workerPool),
427 0 : verifyCount(_vvecs.size()),
428 0 : doneCallback(std::move(_doneCallback))
429 0 : {
430 0 : }
431 :
432 0 : void Start()
433 : {
434 0 : if (!aggregated) {
435 : // treat all inputs as one large batch
436 0 : batchSize = vvecs.size();
437 0 : } else {
438 0 : batchCount = (vvecs.size() + batchSize - 1) / batchSize;
439 : }
440 :
441 0 : batchStates.resize(batchCount);
442 0 : for (size_t i = 0; i < batchCount; i++) {
443 0 : auto& batchState = batchStates[i];
444 :
445 0 : batchState.aggDone = std::make_unique<std::atomic<int>>(0);
446 0 : batchState.start = i * batchSize;
447 0 : batchState.count = std::min(batchSize, vvecs.size() - batchState.start);
448 0 : batchState.verifyResults.assign(batchState.count, 0);
449 0 : }
450 :
451 0 : if (aggregated) {
452 0 : size_t batchCount2 = batchCount; // 'this' might get deleted while we're still looping
453 0 : for (size_t i = 0; i < batchCount2; i++) {
454 0 : AsyncAggregate(i);
455 0 : }
456 0 : } else {
457 : // treat all inputs as a single batch and verify one-by-one
458 0 : AsyncVerifyBatchOneByOne(0);
459 : }
460 0 : }
461 :
462 0 : void Finish()
463 : {
464 0 : size_t batchIdx = 0;
465 0 : std::vector<bool> result(vvecs.size());
466 0 : for (size_t i = 0; i < vvecs.size(); i += batchSize) {
467 0 : const auto& batchState = batchStates[batchIdx++];
468 0 : for (size_t j = 0; j < batchState.count; j++) {
469 0 : result[batchState.start + j] = batchState.verifyResults[j] != 0;
470 0 : }
471 0 : }
472 0 : doneCallback(result);
473 0 : }
474 :
475 0 : void AsyncAggregate(size_t batchIdx)
476 : {
477 0 : auto& batchState = batchStates[batchIdx];
478 :
479 : // aggregate vvecs and skShares of batch in parallel
480 0 : auto self(this->shared_from_this());
481 0 : auto vvecAgg = std::make_shared<VectorAggregator<CBLSPublicKey>>(vvecs.subspan(batchState.start, batchState.count), parallel, workerPool, [this, self, batchIdx] (const BLSVerificationVectorPtr& vvec) {HandleAggVvecDone(batchIdx, vvec);});
482 0 : auto skShareAgg = std::make_shared<Aggregator<CBLSSecretKey>>(Span{skShares}.subspan(batchState.start, batchState.count), parallel, workerPool, [this, self, batchIdx] (const CBLSSecretKey& skShare) {HandleAggSkShareDone(batchIdx, skShare);});
483 :
484 0 : vvecAgg->Start();
485 0 : skShareAgg->Start();
486 0 : }
487 :
488 0 : void HandleAggVvecDone(size_t batchIdx, const BLSVerificationVectorPtr& vvec)
489 : {
490 0 : auto& batchState = batchStates[batchIdx];
491 0 : batchState.vvec = vvec;
492 0 : if (++(*batchState.aggDone) == 2) {
493 0 : HandleAggDone(batchIdx);
494 0 : }
495 0 : }
496 0 : void HandleAggSkShareDone(size_t batchIdx, const CBLSSecretKey& skShare)
497 : {
498 0 : auto& batchState = batchStates[batchIdx];
499 0 : batchState.skShare = skShare;
500 0 : if (++(*batchState.aggDone) == 2) {
501 0 : HandleAggDone(batchIdx);
502 0 : }
503 0 : }
504 :
505 0 : void HandleVerifyDone(size_t count)
506 : {
507 0 : size_t c = verifyDoneCount += count;
508 0 : if (c == verifyCount) {
509 0 : Finish();
510 0 : }
511 0 : }
512 :
513 0 : void HandleAggDone(size_t batchIdx)
514 : {
515 0 : auto& batchState = batchStates[batchIdx];
516 :
517 0 : if (batchState.vvec == nullptr || batchState.vvec->empty() || !batchState.skShare.IsValid()) {
518 : // something went wrong while aggregating and there is nothing we can do now except mark the whole batch as failed
519 : // this can only happen if inputs were invalid in some way
520 0 : batchState.verifyResults.assign(batchState.count, 0);
521 0 : HandleVerifyDone(batchState.count);
522 0 : return;
523 : }
524 :
525 0 : AsyncAggregatedVerifyBatch(batchIdx);
526 0 : }
527 :
528 0 : void AsyncAggregatedVerifyBatch(size_t batchIdx)
529 : {
530 0 : auto self(this->shared_from_this());
531 0 : auto f = [this, self, batchIdx](int threadId) {
532 0 : auto& batchState = batchStates[batchIdx];
533 0 : bool result = Verify(batchState.vvec, batchState.skShare);
534 0 : if (result) {
535 : // whole batch is valid
536 0 : batchState.verifyResults.assign(batchState.count, 1);
537 0 : HandleVerifyDone(batchState.count);
538 0 : } else {
539 : // at least one entry in the batch is invalid, revert to per-contribution verification (but parallelized)
540 0 : AsyncVerifyBatchOneByOne(batchIdx);
541 : }
542 0 : };
543 0 : PushOrDoWork(std::move(f));
544 0 : }
545 :
546 0 : void AsyncVerifyBatchOneByOne(size_t batchIdx)
547 : {
548 0 : size_t count = batchStates[batchIdx].count;
549 0 : batchStates[batchIdx].verifyResults.assign(count, 0);
550 0 : for (size_t i = 0; i < count; i++) {
551 0 : auto self(this->shared_from_this());
552 0 : auto f = [this, self, i, batchIdx](int threadId) {
553 0 : auto& batchState = batchStates[batchIdx];
554 0 : batchState.verifyResults[i] = Verify(vvecs[batchState.start + i], skShares[batchState.start + i]);
555 0 : HandleVerifyDone(1);
556 0 : };
557 0 : PushOrDoWork(std::move(f));
558 0 : }
559 0 : }
560 :
561 0 : bool Verify(const BLSVerificationVectorPtr& vvec, const CBLSSecretKey& skShare) const
562 : {
563 0 : CBLSPublicKey pk1;
564 0 : if (!pk1.PublicKeyShare(*vvec, forId)) {
565 0 : return false;
566 : }
567 :
568 0 : CBLSPublicKey pk2 = skShare.GetPublicKey();
569 0 : return pk1 == pk2;
570 0 : }
571 :
572 : template <typename Callable>
573 0 : void PushOrDoWork(Callable&& f)
574 : {
575 0 : if (parallel) {
576 0 : workerPool.push(std::forward<Callable>(f));
577 0 : } else {
578 0 : f(0);
579 : }
580 0 : }
581 : };
582 :
583 0 : void CBLSWorker::AsyncBuildQuorumVerificationVector(Span<BLSVerificationVectorPtr> vvecs, bool parallel,
584 : std::function<void(const BLSVerificationVectorPtr&)> doneCallback)
585 : {
586 0 : if (vvecs.empty()) {
587 0 : doneCallback(nullptr);
588 0 : return;
589 : }
590 0 : if (!VerifyVerificationVectors(vvecs)) {
591 0 : doneCallback(nullptr);
592 0 : return;
593 : }
594 :
595 0 : auto agg = std::make_shared<VectorAggregator<CBLSPublicKey>>(vvecs, parallel, workerPool, std::move(doneCallback));
596 0 : agg->Start();
597 0 : }
598 :
599 0 : std::future<BLSVerificationVectorPtr> CBLSWorker::AsyncBuildQuorumVerificationVector(Span<BLSVerificationVectorPtr> vvecs, bool parallel)
600 : {
601 0 : auto p = BuildFutureDoneCallback<BLSVerificationVectorPtr>();
602 0 : AsyncBuildQuorumVerificationVector(vvecs, parallel, std::move(p.first));
603 0 : return std::move(p.second);
604 0 : }
605 :
606 0 : BLSVerificationVectorPtr CBLSWorker::BuildQuorumVerificationVector(Span<BLSVerificationVectorPtr> vvecs, bool parallel)
607 : {
608 0 : return AsyncBuildQuorumVerificationVector(vvecs, parallel).get();
609 0 : }
610 :
611 : template <typename T>
612 0 : void AsyncAggregateHelper(ctpl::thread_pool& workerPool, Span<T> vec, bool parallel,
613 : std::function<void(const T&)> doneCallback)
614 : {
615 0 : if (vec.empty()) {
616 0 : doneCallback(T());
617 0 : return;
618 : }
619 0 : if (!VerifyVectorHelper(vec)) {
620 0 : doneCallback(T());
621 0 : return;
622 : }
623 :
624 0 : auto agg = std::make_shared<Aggregator<T>>(vec, parallel, workerPool, std::move(doneCallback));
625 0 : agg->Start();
626 0 : }
627 :
628 0 : void CBLSWorker::AsyncAggregateSecretKeys(Span<CBLSSecretKey> secKeys, bool parallel,
629 : std::function<void(const CBLSSecretKey&)> doneCallback)
630 : {
631 0 : AsyncAggregateHelper(workerPool, secKeys, parallel, std::move(doneCallback));
632 0 : }
633 :
634 0 : std::future<CBLSSecretKey> CBLSWorker::AsyncAggregateSecretKeys(Span<CBLSSecretKey> secKeys, bool parallel)
635 : {
636 0 : auto p = BuildFutureDoneCallback<CBLSSecretKey>();
637 0 : AsyncAggregateSecretKeys(secKeys, parallel, std::move(p.first));
638 0 : return std::move(p.second);
639 0 : }
640 :
641 0 : CBLSSecretKey CBLSWorker::AggregateSecretKeys(Span<CBLSSecretKey> secKeys, bool parallel)
642 : {
643 0 : return AsyncAggregateSecretKeys(secKeys, parallel).get();
644 0 : }
645 :
646 0 : void CBLSWorker::AsyncAggregatePublicKeys(Span<CBLSPublicKey> pubKeys, bool parallel,
647 : std::function<void(const CBLSPublicKey&)> doneCallback)
648 : {
649 0 : AsyncAggregateHelper(workerPool, pubKeys, parallel, std::move(doneCallback));
650 0 : }
651 :
652 0 : std::future<CBLSPublicKey> CBLSWorker::AsyncAggregatePublicKeys(Span<CBLSPublicKey> pubKeys, bool parallel)
653 : {
654 0 : auto p = BuildFutureDoneCallback<CBLSPublicKey>();
655 0 : AsyncAggregatePublicKeys(pubKeys, parallel, std::move(p.first));
656 0 : return std::move(p.second);
657 0 : }
658 :
659 0 : void CBLSWorker::AsyncAggregateSigs(Span<CBLSSignature> sigs, bool parallel,
660 : std::function<void(const CBLSSignature&)> doneCallback)
661 : {
662 0 : AsyncAggregateHelper(workerPool, sigs, parallel, std::move(doneCallback));
663 0 : }
664 :
665 0 : std::future<CBLSSignature> CBLSWorker::AsyncAggregateSigs(Span<CBLSSignature> sigs, bool parallel)
666 : {
667 0 : auto p = BuildFutureDoneCallback<CBLSSignature>();
668 0 : AsyncAggregateSigs(sigs, parallel, std::move(p.first));
669 0 : return std::move(p.second);
670 0 : }
671 :
672 0 : CBLSPublicKey CBLSWorker::BuildPubKeyShare(const BLSVerificationVectorPtr& vvec, const CBLSId& id)
673 : {
674 0 : CBLSPublicKey pkShare;
675 0 : pkShare.PublicKeyShare(*vvec, id);
676 0 : return pkShare;
677 : }
678 :
679 0 : void CBLSWorker::AsyncVerifyContributionShares(const CBLSId& forId, Span<BLSVerificationVectorPtr> vvecs, Span<CBLSSecretKey> skShares,
680 : bool parallel, bool aggregated, std::function<void(const std::vector<bool>&)> doneCallback)
681 : {
682 0 : if (!forId.IsValid() || !VerifyVerificationVectors(vvecs)) {
683 0 : std::vector<bool> result;
684 0 : result.assign(vvecs.size(), false);
685 0 : doneCallback(result);
686 : return;
687 0 : }
688 :
689 0 : auto verifier = std::make_shared<ContributionVerifier>(forId, vvecs, skShares, 8, parallel, aggregated, workerPool, std::move(doneCallback));
690 0 : verifier->Start();
691 0 : }
692 :
693 0 : std::future<std::vector<bool> > CBLSWorker::AsyncVerifyContributionShares(const CBLSId& forId, Span<BLSVerificationVectorPtr> vvecs, Span<CBLSSecretKey> skShares,
694 : bool parallel, bool aggregated)
695 : {
696 0 : auto p = BuildFutureDoneCallback<std::vector<bool> >();
697 0 : AsyncVerifyContributionShares(forId, vvecs, skShares, parallel, aggregated, std::move(p.first));
698 0 : return std::move(p.second);
699 0 : }
700 :
701 0 : std::vector<bool> CBLSWorker::VerifyContributionShares(const CBLSId& forId, Span<BLSVerificationVectorPtr> vvecs, Span<CBLSSecretKey> skShares,
702 : bool parallel, bool aggregated)
703 : {
704 0 : return AsyncVerifyContributionShares(forId, vvecs, skShares, parallel, aggregated).get();
705 0 : }
706 :
707 0 : std::future<bool> CBLSWorker::AsyncVerifyContributionShare(const CBLSId& forId,
708 : const BLSVerificationVectorPtr& vvec,
709 : const CBLSSecretKey& skContribution)
710 : {
711 0 : if (!forId.IsValid() || !VerifyVerificationVector(*vvec)) {
712 0 : auto p = BuildFutureDoneCallback<bool>();
713 0 : p.first(false);
714 0 : return std::move(p.second);
715 0 : }
716 :
717 0 : auto f = [&forId, &vvec, &skContribution](int threadId) {
718 0 : CBLSPublicKey pk1;
719 0 : if (!pk1.PublicKeyShare(*vvec, forId)) {
720 0 : return false;
721 : }
722 :
723 0 : CBLSPublicKey pk2 = skContribution.GetPublicKey();
724 0 : return pk1 == pk2;
725 0 : };
726 0 : return workerPool.push(f);
727 0 : }
728 :
729 0 : bool CBLSWorker::VerifyVerificationVector(Span<CBLSPublicKey> vvec)
730 : {
731 0 : return VerifyVectorHelper(vvec);
732 : }
733 :
734 0 : bool CBLSWorker::VerifyVerificationVectors(Span<BLSVerificationVectorPtr> vvecs)
735 : {
736 0 : std::set<uint256> set;
737 0 : for (const auto& vvec : vvecs) {
738 0 : if (vvec == nullptr) {
739 0 : return false;
740 : }
741 0 : if (vvec->size() != vvecs[0]->size()) {
742 0 : return false;
743 : }
744 0 : for (size_t j = 0; j < vvec->size(); j++) {
745 0 : if (!(*vvec)[j].IsValid()) {
746 0 : return false;
747 : }
748 : // check duplicates
749 0 : if (!set.emplace((*vvec)[j].GetHash()).second) {
750 0 : return false;
751 : }
752 0 : }
753 : }
754 :
755 0 : return true;
756 0 : }
757 :
758 0 : void CBLSWorker::AsyncSign(const CBLSSecretKey& secKey, const uint256& msgHash, const CBLSWorker::SignDoneCallback& doneCallback)
759 : {
760 0 : workerPool.push([secKey, msgHash, doneCallback](int threadId) {
761 0 : doneCallback(secKey.Sign(msgHash, bls::bls_legacy_scheme.load()));
762 0 : });
763 0 : }
764 :
765 0 : void CBLSWorker::AsyncVerifySig(const CBLSSignature& sig, const CBLSPublicKey& pubKey, const uint256& msgHash,
766 : CBLSWorker::SigVerifyDoneCallback doneCallback, CancelCond cancelCond)
767 : {
768 0 : if (!sig.IsValid() || !pubKey.IsValid()) {
769 0 : doneCallback(false);
770 0 : return;
771 : }
772 :
773 0 : std::unique_lock<std::mutex> l(sigVerifyMutex);
774 :
775 0 : bool foundDuplicate = std::ranges::any_of(sigVerifyQueue,
776 0 : [&msgHash](const auto& job) { return job.msgHash == msgHash; });
777 :
778 0 : if (foundDuplicate) {
779 : // batched/aggregated verification does not allow duplicate hashes, so we push what we currently have and start
780 : // with a fresh batch
781 0 : PushSigVerifyBatch();
782 0 : }
783 :
784 0 : sigVerifyQueue.emplace_back(std::move(doneCallback), std::move(cancelCond), sig, pubKey, msgHash);
785 0 : if (sigVerifyBatchesInProgress == 0 || sigVerifyQueue.size() >= SIG_VERIFY_BATCH_SIZE) {
786 0 : PushSigVerifyBatch();
787 0 : }
788 0 : }
789 :
790 0 : std::future<bool> CBLSWorker::AsyncVerifySig(const CBLSSignature& sig, const CBLSPublicKey& pubKey, const uint256& msgHash, CancelCond cancelCond)
791 : {
792 0 : auto p = BuildFutureDoneCallback2<bool>();
793 0 : AsyncVerifySig(sig, pubKey, msgHash, std::move(p.first), std::move(cancelCond));
794 0 : return std::move(p.second);
795 0 : }
796 :
797 0 : bool CBLSWorker::IsAsyncVerifyInProgress()
798 : {
799 0 : std::unique_lock<std::mutex> l(sigVerifyMutex);
800 0 : return sigVerifyBatchesInProgress != 0;
801 0 : }
802 :
803 : // sigVerifyMutex must be held while calling
804 0 : void CBLSWorker::PushSigVerifyBatch()
805 : {
806 0 : auto f = [this](int threadId, const std::shared_ptr<std::vector<SigVerifyJob> >& _jobs) {
807 0 : auto& jobs = *_jobs;
808 0 : if (jobs.size() == 1) {
809 0 : const auto& job = jobs[0];
810 0 : if (!job.cancelCond()) {
811 0 : bool valid = job.sig.VerifyInsecure(job.pubKey, job.msgHash);
812 0 : job.doneCallback(valid);
813 0 : }
814 0 : std::unique_lock<std::mutex> l(sigVerifyMutex);
815 0 : sigVerifyBatchesInProgress--;
816 0 : if (!sigVerifyQueue.empty()) {
817 0 : PushSigVerifyBatch();
818 0 : }
819 : return;
820 0 : }
821 :
822 0 : CBLSSignature aggSig;
823 0 : std::vector<size_t> indexes;
824 0 : std::vector<CBLSPublicKey> pubKeys;
825 0 : std::vector<uint256> msgHashes;
826 0 : indexes.reserve(jobs.size());
827 0 : pubKeys.reserve(jobs.size());
828 0 : msgHashes.reserve(jobs.size());
829 0 : for (size_t i = 0; i < jobs.size(); i++) {
830 0 : auto& job = jobs[i];
831 0 : if (job.cancelCond()) {
832 0 : continue;
833 : }
834 0 : if (pubKeys.empty()) {
835 0 : aggSig = job.sig;
836 0 : } else {
837 0 : aggSig.AggregateInsecure(job.sig);
838 : }
839 0 : indexes.emplace_back(i);
840 0 : pubKeys.emplace_back(job.pubKey);
841 0 : msgHashes.emplace_back(job.msgHash);
842 0 : }
843 :
844 0 : if (!pubKeys.empty()) {
845 0 : bool allValid = aggSig.VerifyInsecureAggregated(pubKeys, msgHashes);
846 0 : if (allValid) {
847 0 : for (size_t i = 0; i < pubKeys.size(); i++) {
848 0 : jobs[indexes[i]].doneCallback(true);
849 0 : }
850 0 : } else {
851 : // one or more sigs were not valid, revert to per-sig verification
852 : // TODO this could be improved if we would cache pairing results in some way as the previous aggregated verification already calculated all the pairings for the hashes
853 0 : for (size_t i = 0; i < pubKeys.size(); i++) {
854 0 : const auto& job = jobs[indexes[i]];
855 0 : bool valid = job.sig.VerifyInsecure(job.pubKey, job.msgHash);
856 0 : job.doneCallback(valid);
857 0 : }
858 : }
859 0 : }
860 :
861 0 : std::unique_lock<std::mutex> l(sigVerifyMutex);
862 0 : sigVerifyBatchesInProgress--;
863 0 : if (!sigVerifyQueue.empty()) {
864 0 : PushSigVerifyBatch();
865 0 : }
866 0 : };
867 :
868 0 : auto batch = std::make_shared<std::vector<SigVerifyJob> >(std::move(sigVerifyQueue));
869 0 : sigVerifyQueue.reserve(SIG_VERIFY_BATCH_SIZE);
870 :
871 0 : sigVerifyBatchesInProgress++;
872 0 : workerPool.push(f, batch);
873 0 : }
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