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// Copyright 2018 Chia Network Inc
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <ctime>
#include <set>
#include "cxxopts.hpp"
#include "../lib/include/picosha2.hpp"
#include "plotter_disk.hpp"
#include "prover_disk.hpp"
#include "verifier.hpp"
using std::string;
using std::vector;
using std::endl;
using std::cout;
void HexToBytes(const string &hex, uint8_t *result)
{
for (uint32_t i = 0; i < hex.length(); i += 2) {
string byteString = hex.substr(i, 2);
uint8_t byte = (uint8_t)strtol(byteString.c_str(), NULL, 16);
result[i / 2] = byte;
}
}
vector<unsigned char> intToBytes(uint32_t paramInt, uint32_t numBytes)
{
vector<unsigned char> arrayOfByte(numBytes, 0);
for (uint32_t i = 0; paramInt > 0; i++) {
arrayOfByte[numBytes - i - 1] = paramInt & 0xff;
paramInt >>= 8;
}
return arrayOfByte;
}
string Strip0x(const string &hex)
{
if (hex.size() > 1 && (hex.substr(0, 2) == "0x" || hex.substr(0, 2) == "0X")) {
return hex.substr(2);
}
return hex;
}
void HelpAndQuit(cxxopts::Options options)
{
cout << options.help({""}) << endl;
cout << "./ProofOfSpace create" << endl;
cout << "./ProofOfSpace prove <challenge>" << endl;
cout << "./ProofOfSpace verify <proof> <challenge>" << endl;
cout << "./ProofOfSpace check" << endl;
exit(0);
}
int main(int argc, char *argv[]) try {
cxxopts::Options options(
"ProofOfSpace", "Utility for plotting, generating and verifying proofs of space.");
options.positional_help("(create/prove/verify/check) param1 param2 ")
.show_positional_help();
// Default values
uint8_t k = 20;
uint32_t num_buckets = 0;
uint32_t num_stripes = 0;
uint8_t num_threads = 0;
string filename = "plot.dat";
string tempdir = ".";
string tempdir2 = ".";
string finaldir = ".";
string operation = "help";
string memo = "0102030405";
string id = "022fb42c08c12de3a6af053880199806532e79515f94e83461612101f9412f9e";
bool nobitfield = false;
bool show_progress = false;
uint32_t buffmegabytes = 0;
options.allow_unrecognised_options().add_options()(
"k, size", "Plot size", cxxopts::value<uint8_t>(k))(
"r, threads", "Number of threads", cxxopts::value<uint8_t>(num_threads))(
"u, buckets", "Number of buckets", cxxopts::value<uint32_t>(num_buckets))(
"s, stripes", "Size of stripes", cxxopts::value<uint32_t>(num_stripes))(
"t, tempdir", "Temporary directory", cxxopts::value<string>(tempdir))(
"2, tempdir2", "Second Temporary directory", cxxopts::value<string>(tempdir2))(
"d, finaldir", "Final directory", cxxopts::value<string>(finaldir))(
"f, file", "Filename", cxxopts::value<string>(filename))(
"m, memo", "Memo to insert into the plot", cxxopts::value<string>(memo))(
"i, id", "Unique 32-byte seed for the plot", cxxopts::value<string>(id))(
"e, nobitfield", "Disable bitfield", cxxopts::value<bool>(nobitfield))(
"b, buffer",
"Megabytes to be used as buffer for sorting and plotting",
cxxopts::value<uint32_t>(buffmegabytes))(
"p, progress", "Display progress percentage during plotting",
cxxopts::value<bool>(show_progress))(
"help", "Print help");
auto result = options.parse(argc, argv);
if (result.count("help") || argc < 2) {
HelpAndQuit(options);
}
operation = argv[1];
std::cout << "operation: " << operation << std::endl;
if (operation == "help") {
HelpAndQuit(options);
} else if (operation == "create") {
cout << "Generating plot for k=" << static_cast<int>(k) << " filename=" << filename
<< " id=" << id << endl
<< endl;
id = Strip0x(id);
if (id.size() != 64) {
cout << "Invalid ID, should be 32 bytes (hex)" << endl;
exit(1);
}
memo = Strip0x(memo);
if (memo.size() % 2 != 0) {
cout << "Invalid memo, should be only whole bytes (hex)" << endl;
exit(1);
}
std::vector<uint8_t> memo_bytes(memo.size() / 2);
std::array<uint8_t, 32> id_bytes;
HexToBytes(memo, memo_bytes.data());
HexToBytes(id, id_bytes.data());
DiskPlotter plotter = DiskPlotter();
plotter.CreatePlotDisk(
tempdir,
tempdir2,
finaldir,
filename,
k,
memo_bytes.data(),
memo_bytes.size(),
id_bytes.data(),
id_bytes.size(),
buffmegabytes,
num_buckets,
num_stripes,
num_threads,
nobitfield,
show_progress);
} else if (operation == "prove") {
if (argc < 3) {
HelpAndQuit(options);
}
cout << "Proving using filename=" << filename << " challenge=" << argv[2] << endl
<< endl;
string challenge = Strip0x(argv[2]);
if (challenge.size() != 64) {
cout << "Invalid challenge, should be 32 bytes" << endl;
exit(1);
}
uint8_t challenge_bytes[32];
HexToBytes(challenge, challenge_bytes);
DiskProver prover(filename);
try {
vector<LargeBits> qualities = prover.GetQualitiesForChallenge(challenge_bytes);
for (uint32_t i = 0; i < qualities.size(); i++) {
k = prover.GetSize();
uint8_t *proof_data = new uint8_t[8 * k];
LargeBits proof = prover.GetFullProof(challenge_bytes, i);
proof.ToBytes(proof_data);
cout << "Proof: 0x" << Util::HexStr(proof_data, k * 8) << endl;
delete[] proof_data;
}
if (qualities.empty()) {
cout << "No proofs found." << endl;
exit(1);
}
} catch (const std::exception& ex) {
std::cout << "Error proving. " << ex.what() << std::endl;
exit(1);
} catch (...) {
std::cout << "Error proving. " << std::endl;
exit(1);
}
} else if (operation == "verify") {
if (argc < 4) {
HelpAndQuit(options);
}
Verifier verifier = Verifier();
id = Strip0x(id);
string proof = Strip0x(argv[2]);
string challenge = Strip0x(argv[3]);
if (id.size() != 64) {
cout << "Invalid ID, should be 32 bytes" << endl;
exit(1);
}
if (challenge.size() != 64) {
cout << "Invalid challenge, should be 32 bytes" << endl;
exit(1);
}
if (proof.size() % 16) {
cout << "Invalid proof, should be a multiple of 8 bytes" << endl;
exit(1);
}
k = proof.size() / 16;
cout << "Verifying proof=" << argv[2] << " for challenge=" << argv[3]
<< " and k=" << static_cast<int>(k) << endl
<< endl;
uint8_t id_bytes[32];
uint8_t challenge_bytes[32];
uint8_t *proof_bytes = new uint8_t[proof.size() / 2];
HexToBytes(id, id_bytes);
HexToBytes(challenge, challenge_bytes);
HexToBytes(proof, proof_bytes);
LargeBits quality =
verifier.ValidateProof(id_bytes, k, challenge_bytes, proof_bytes, k * 8);
if (quality.GetSize() == 256) {
cout << "Proof verification suceeded. Quality: " << quality << endl;
} else {
cout << "Proof verification failed." << endl;
exit(1);
}
delete[] proof_bytes;
} else if (operation == "check") {
uint32_t iterations = 1000;
if (argc == 3) {
iterations = std::stoi(argv[2]);
}
DiskProver prover(filename);
Verifier verifier = Verifier();
uint32_t success = 0;
uint8_t id_bytes[32];
prover.GetId(id_bytes);
k = prover.GetSize();
for (uint32_t num = 0; num < iterations; num++) {
vector<unsigned char> hash_input = intToBytes(num, 4);
hash_input.insert(hash_input.end(), &id_bytes[0], &id_bytes[32]);
vector<unsigned char> hash(picosha2::k_digest_size);
picosha2::hash256(hash_input.begin(), hash_input.end(), hash.begin(), hash.end());
try {
vector<LargeBits> qualities = prover.GetQualitiesForChallenge(hash.data());
for (uint32_t i = 0; i < qualities.size(); i++) {
LargeBits proof = prover.GetFullProof(hash.data(), i);
uint8_t *proof_data = new uint8_t[proof.GetSize() / 8];
proof.ToBytes(proof_data);
cout << "i: " << num << std::endl;
cout << "challenge: 0x" << Util::HexStr(hash.data(), 256 / 8) << endl;
cout << "proof: 0x" << Util::HexStr(proof_data, k * 8) << endl;
LargeBits quality =
verifier.ValidateProof(id_bytes, k, hash.data(), proof_data, k * 8);
if (quality.GetSize() == 256 && quality == qualities[i]) {
cout << "quality: " << quality << endl;
cout << "Proof verification suceeded. k = " << static_cast<int>(k) << endl;
success++;
} else {
cout << "Proof verification failed." << endl;
}
delete[] proof_data;
}
} catch (const std::exception& error) {
cout << "Threw: " << error.what() << endl;
continue;
}
}
std::cout << "Total success: " << success << "/" << iterations << ", "
<< (success * 100 / static_cast<double>(iterations)) << "%." << std::endl;
if (show_progress) { progress(4, 1, 1); }
} else {
cout << "Invalid operation. Use create/prove/verify/check" << endl;
}
return 0;
} catch (const cxxopts::OptionException &e) {
cout << "error parsing options: " << e.what() << endl;
return 1;
} catch (const std::exception &e) {
std::cerr << "Caught exception: " << e.what() << endl;
throw e;
}
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