Add implementation of random beacon for phase 2 of Sapling MPC.
This commit is contained in:
Sean Bowe
parent
2fefa81042
commit
c2ada36aa7
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@ -109,6 +109,23 @@ dependencies = [
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"typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "hex-literal"
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version = "0.1.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"hex-literal-impl 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"proc-macro-hack 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "hex-literal-impl"
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version = "0.1.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"proc-macro-hack 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "libc"
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version = "0.2.40"
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@ -150,6 +167,19 @@ dependencies = [
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"rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "proc-macro-hack"
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version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"proc-macro-hack-impl 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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[[package]]
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name = "proc-macro-hack-impl"
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version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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[[package]]
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name = "rand"
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version = "0.4.2"
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@ -178,6 +208,8 @@ name = "sapling-mpc"
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version = "0.2.0"
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dependencies = [
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"blake2-rfc 0.2.18 (registry+https://github.com/rust-lang/crates.io-index)",
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"byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
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"hex-literal 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"pairing 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"phase2 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
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"rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
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@ -224,11 +256,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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"checksum futures 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)" = "1a70b146671de62ec8c8ed572219ca5d594d9b06c0b364d5e67b722fc559b48c"
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"checksum futures-cpupool 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "ab90cde24b3319636588d0c35fe03b1333857621051837ed769faefb4c2162e4"
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"checksum generic-array 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ef25c5683767570c2bbd7deba372926a55eaae9982d7726ee2a1050239d45b9d"
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"checksum hex-literal 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4da5f0e01bd8a71a224a4eedecaacfcabda388dbb7a80faf04d3514287572d95"
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"checksum hex-literal-impl 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "1d340b6514f232f6db1bd16db65302a5278a04fef9ce867cb932e7e5fa21130a"
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"checksum libc 0.2.40 (registry+https://github.com/rust-lang/crates.io-index)" = "6fd41f331ac7c5b8ac259b8bf82c75c0fb2e469bbf37d2becbba9a6a2221965b"
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"checksum nodrop 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "9a2228dca57108069a5262f2ed8bd2e82496d2e074a06d1ccc7ce1687b6ae0a2"
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"checksum num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c51a3322e4bca9d212ad9a158a02abc6934d005490c054a2778df73a70aa0a30"
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"checksum pairing 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)" = "ceda21136251c6d5a422d3d798d8ac22515a6e8d3521bb60c59a8349d36d0d57"
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"checksum phase2 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "606ceb505d6e61f0dfbbc1cd1df498c3e58ad17001f06cb874c3324dd5700e77"
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"checksum proc-macro-hack 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3ba8d4f9257b85eb6cdf13f055cea3190520aab1409ca2ab43493ea4820c25f0"
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"checksum proc-macro-hack-impl 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d5cb6f960ad471404618e9817c0e5d10b1ae74cfdf01fab89ea0641fe7fb2892"
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"checksum rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "eba5f8cb59cc50ed56be8880a5c7b496bfd9bd26394e176bc67884094145c2c5"
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"checksum sapling-crypto 0.0.1 (git+https://github.com/zcash-hackworks/sapling-crypto?rev=eb409fa3cf8df215ae8d35f5e385751a0c5ffb85)" = "<none>"
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"checksum typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169"
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13
Cargo.toml
13
Cargo.toml
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@ -11,6 +11,10 @@ required-features = ["verification"]
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name = "verify"
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required-features = ["verification"]
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[[bin]]
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name = "beacon"
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required-features = ["beacon"]
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[[bin]]
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name = "compute"
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@ -26,11 +30,20 @@ pairing = "0.14"
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rand = "0.4"
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blake2-rfc = "0.2"
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[dependencies.byteorder]
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version = "1"
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optional = true
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[dependencies.sapling-crypto]
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git = "https://github.com/zcash-hackworks/sapling-crypto"
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rev = "eb409fa3cf8df215ae8d35f5e385751a0c5ffb85"
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optional = true
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[dependencies.hex-literal]
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version = "0.1"
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optional = true
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[features]
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verification = ["sapling-crypto"]
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u128-support = ["pairing/u128-support"]
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beacon = ["byteorder", "hex-literal"]
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@ -0,0 +1,85 @@
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extern crate phase2;
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extern crate pairing;
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extern crate rand;
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extern crate blake2_rfc;
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extern crate byteorder;
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#[macro_use]
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extern crate hex_literal;
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use std::fs::File;
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use std::io::{BufWriter, BufReader};
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use blake2_rfc::blake2b::Blake2b;
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fn main() {
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let current_params = File::open("params").expect("couldn't open `./params`");
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let mut current_params = BufReader::with_capacity(1024*1024, current_params);
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let new_params = File::create("new_params").expect("couldn't create `./new_params`");
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let mut new_params = BufWriter::with_capacity(1024*1024, new_params);
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let mut sapling_spend = phase2::MPCParameters::read(&mut current_params, false)
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.expect("couldn't deserialize Sapling Spend params");
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let mut sapling_output = phase2::MPCParameters::read(&mut current_params, false)
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.expect("couldn't deserialize Sapling Output params");
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let mut sprout_joinsplit = phase2::MPCParameters::read(&mut current_params, false)
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.expect("couldn't deserialize Sprout JoinSplit params");
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// Create an RNG based on the outcome of the random beacon
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let rng = &mut {
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use byteorder::{ReadBytesExt, BigEndian};
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use rand::{SeedableRng};
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use rand::chacha::ChaChaRng;
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// Place beacon value here (2^42 SHA256 hash of Bitcoin block hash #534861)
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let beacon_value: [u8; 32] = hex!("0000000000000000000000000000000000000000000000000000000000000000");
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print!("Final result of beacon: ");
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for b in beacon_value.iter() {
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print!("{:02x}", b);
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}
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println!("");
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let mut digest = &beacon_value[..];
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let mut seed = [0u32; 8];
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for i in 0..8 {
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seed[i] = digest.read_u32::<BigEndian>().expect("digest is large enough for this to work");
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}
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ChaChaRng::from_seed(&seed)
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};
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let h1 = sapling_spend.contribute(rng);
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let h2 = sapling_output.contribute(rng);
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let h3 = sprout_joinsplit.contribute(rng);
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sapling_spend.write(&mut new_params).expect("couldn't write new Sapling Spend params");
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sapling_output.write(&mut new_params).expect("couldn't write new Sapling Spend params");
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sprout_joinsplit.write(&mut new_params).expect("couldn't write new Sapling Spend params");
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let mut h = Blake2b::new(64);
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h.update(&h1);
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h.update(&h2);
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h.update(&h3);
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let h = h.finalize();
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print!("Done!\n\n\
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Your contribution has been written to `./new_params`\n\n\
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The contribution you made is bound to the following hash:\n");
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for line in h.as_ref().chunks(16) {
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print!("\t");
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for section in line.chunks(4) {
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for b in section {
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print!("{:02x}", b);
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}
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print!(" ");
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}
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println!("");
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}
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println!("\n");
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}
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