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Allocate range proof verifier vectors #1431

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Apr 16, 2024
Merged

Allocate range proof verifier vectors #1431

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10 changes: 10 additions & 0 deletions src/libspark/bpplus.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -305,6 +305,8 @@ bool BPPlus::verify(const std::vector<std::vector<GroupElement>>& unpadded_C, co
std::size_t N_proofs = proofs.size();
std::size_t max_M = 0; // maximum number of padded aggregated values across all proofs

std::size_t final_size = 0; // size of each vector used in final multiscalar multiplication

// Check aggregated input consistency
for (std::size_t k = 0; k < N_proofs; k++) {
std::size_t unpadded_M = unpadded_C[k].size();
Expand All @@ -331,8 +333,14 @@ bool BPPlus::verify(const std::vector<std::vector<GroupElement>>& unpadded_C, co
if (log2(N*M) != rounds) {
return false;
}

// Update the final vector size: B, A1, A, (C_j), (L), (R)
final_size += 3 + M + 2 * rounds;
}

// Update the final vector size: G, H, (Gi), (Hi)
final_size += 2 + 2 * max_M * N;

// Check the bounds on the batch
if (max_M*N > Gi.size() || max_M*N > Hi.size()) {
return false;
Expand All @@ -341,6 +349,8 @@ bool BPPlus::verify(const std::vector<std::vector<GroupElement>>& unpadded_C, co
// Set up final multiscalar multiplication and common scalars
std::vector<GroupElement> points;
std::vector<Scalar> scalars;
points.reserve(final_size);
scalars.reserve(final_size);
Scalar G_scalar, H_scalar;

// Interleave the Gi and Hi scalars
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