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https://github.com/SChernykh/p2pool.git
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Added more integrity checks
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c75bc83fc1
commit
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@ -911,7 +911,21 @@ uint32_t BlockTemplate::get_hashing_blobs(uint32_t extra_nonce_start, uint32_t c
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for (uint32_t i = 0; i < count; ++i) {
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for (uint32_t i = 0; i < count; ++i) {
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uint8_t blob[128];
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uint8_t blob[128];
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blob_size = get_hashing_blob_nolock(extra_nonce_start + i, blob);
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const uint32_t n = get_hashing_blob_nolock(extra_nonce_start + i, blob);
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if (n > sizeof(blob)) {
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LOGERR(1, "internal error: get_hashing_blob_nolock returned too large blob size " << n << ", expected <= " << sizeof(blob));
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}
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else if (n < 76) {
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LOGERR(1, "internal error: get_hashing_blob_nolock returned too little blob size " << n << ", expected >= 76");
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}
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if (blob_size == 0) {
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blob_size = n;
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}
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else if (n != blob_size) {
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LOGERR(1, "internal error: get_hashing_blob_nolock returned different blob size " << n << ", expected " << blob_size);
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}
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blobs.insert(blobs.end(), blob, blob + blob_size);
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blobs.insert(blobs.end(), blob, blob + blob_size);
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}
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}
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@ -111,6 +111,37 @@ void StratumServer::on_block(const BlockTemplate& block)
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m_extraNonce.exchange(blobs_data->m_numClientsExpected);
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m_extraNonce.exchange(blobs_data->m_numClientsExpected);
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blobs_data->m_blobSize = block.get_hashing_blobs(0, blobs_data->m_numClientsExpected, blobs_data->m_blobs, blobs_data->m_height, difficulty, sidechain_difficulty, blobs_data->m_seedHash, nonce_offset, blobs_data->m_templateId);
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blobs_data->m_blobSize = block.get_hashing_blobs(0, blobs_data->m_numClientsExpected, blobs_data->m_blobs, blobs_data->m_height, difficulty, sidechain_difficulty, blobs_data->m_seedHash, nonce_offset, blobs_data->m_templateId);
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// Integrity checks
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if (blobs_data->m_blobSize < 76) {
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LOGERR(1, "internal error: get_hashing_blobs returned too small blobs (" << blobs_data->m_blobSize << " bytes)");
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}
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else if (blobs_data->m_blobs.size() != blobs_data->m_blobSize * num_connections) {
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LOGERR(1, "internal error: get_hashing_blobs returned wrong amount of data");
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}
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else if (num_connections > 1) {
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std::vector<uint64_t> blob_hashes;
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blob_hashes.reserve(num_connections);
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const uint8_t* data = blobs_data->m_blobs.data();
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const size_t size = blobs_data->m_blobSize;
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// Get first 8 bytes of the Merkle root hash from each blob
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for (size_t i = 0; i < num_connections; ++i) {
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blob_hashes.emplace_back(*reinterpret_cast<const uint64_t*>(data + i * size + 43));
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}
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// Find duplicates
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std::sort(blob_hashes.begin(), blob_hashes.end());
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for (uint32_t i = 1; i < num_connections; ++i) {
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if (blob_hashes[i - 1] == blob_hashes[i]) {
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LOGERR(1, "internal error: get_hashing_blobs returned two identical blobs");
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break;
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}
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}
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}
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blobs_data->m_target = std::max(difficulty.target(), sidechain_difficulty.target());
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blobs_data->m_target = std::max(difficulty.target(), sidechain_difficulty.target());
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{
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{
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