2018-02-24 00:12:58 -08:00
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extern crate bn;
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2018-02-24 23:46:52 -08:00
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extern crate rand;
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extern crate bincode;
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extern crate sodiumoxide;
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2018-03-24 06:44:45 -07:00
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2018-02-24 23:46:52 -08:00
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use std::fmt;
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2018-03-24 06:44:45 -07:00
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use std::str;
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use std::default;
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2018-02-24 23:46:52 -08:00
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use bn::{Group, Fr, G1, G2, pairing};
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use bincode::SizeLimit::Infinite;
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use bincode::rustc_serialize::{encode, decode};
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2018-03-24 06:44:45 -07:00
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use sodiumoxide::crypto::hash::sha512;
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2018-02-24 00:12:58 -08:00
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2018-02-24 23:46:52 -08:00
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// Begin CL Signature scheme data structures
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2018-02-24 00:12:58 -08:00
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2018-02-24 23:46:52 -08:00
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// End CL Signature scheme data structures
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2018-02-24 00:12:58 -08:00
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2018-03-24 06:44:45 -07:00
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//pub fn hash_string(s: &str) -> String {
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// let digest = sha256::hash(s.as_bytes());
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// format!("{:X}", HexSlice::new(&digest))
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//}
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2018-02-24 23:46:52 -08:00
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2018-03-24 06:44:45 -07:00
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pub fn debug_elem_in_hex(prefix: &str, r: &Fr) {
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let encoded: Vec<u8> = encode(&r, Infinite).unwrap();
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print!("{} (hex) = 0x", prefix);
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for e in encoded.iter() {
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print!("{:x}", e);
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}
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print!("\n");
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2018-02-24 00:12:58 -08:00
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}
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2018-03-24 06:44:45 -07:00
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struct HexSlice<'a>(&'a [u8]);
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impl<'a> HexSlice<'a> {
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fn new<T>(data: &'a T) -> HexSlice<'a>
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where T: ?Sized + AsRef<[u8]> + 'a
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{
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HexSlice(data.as_ref())
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2018-02-24 23:46:52 -08:00
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}
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}
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2018-02-24 00:12:58 -08:00
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2018-03-24 06:44:45 -07:00
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impl<'a> fmt::LowerHex for HexSlice<'a> {
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2018-02-24 23:46:52 -08:00
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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2018-03-24 06:44:45 -07:00
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for byte in self.0 {
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// Decide if you want upper- or lowercase results,
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// padding the values to two characters, spaces
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// between bytes, etc.
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write!(f, "{:x}", byte)?;
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2018-02-24 23:46:52 -08:00
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}
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2018-03-24 06:44:45 -07:00
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Ok(())
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2018-02-24 23:46:52 -08:00
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}
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2018-02-24 00:12:58 -08:00
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}
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2018-03-24 06:44:45 -07:00
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impl<'a> fmt::UpperHex for HexSlice<'a> {
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2018-02-24 23:46:52 -08:00
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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2018-03-24 06:44:45 -07:00
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for byte in self.0 {
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// Decide if you want upper- or lowercase results,
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// padding the values to two characters, spaces
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// between bytes, etc.
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write!(f, "{:X}", byte)?;
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2018-02-24 23:46:52 -08:00
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}
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2018-03-24 06:44:45 -07:00
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Ok(())
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2018-02-24 23:46:52 -08:00
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}
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2018-02-24 00:12:58 -08:00
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}
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2018-03-24 06:44:45 -07:00
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// To hash this message structure, encode each element in the tuple
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// as a byte stream, then apply a hash on it. Then, convert the output value into
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// a Fr element.
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2018-02-24 00:12:58 -08:00
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2018-02-24 23:46:52 -08:00
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pub fn misc_tests() {
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let rng = &mut rand::thread_rng();
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let a = Fr::random(rng);
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// println!("crs = {}", stringify!(a));
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// let limit = bincode::SizeLimit::Bounded(256);
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let encoded: Vec<u8> = encode(&a, Infinite).unwrap();
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println!("a length = {}", encoded.len());
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println!("a = {:?}", encoded);
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print!("a (hex) = 0x");
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for x in encoded.iter() {
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print!("{:x}", x);
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}
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print!("\n");
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2018-02-24 00:12:58 -08:00
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}
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2018-02-24 23:46:52 -08:00
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2018-03-24 21:03:59 -07:00
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////////////////////////////////// SymKeyEnc ///////////////////////////////////
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/*
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Symmetric Key Encryption Scheme.
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*/
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pub mod sym {
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2018-03-24 06:44:45 -07:00
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use std::fmt;
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2018-03-24 21:03:59 -07:00
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use sodiumoxide;
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use sodiumoxide::crypto::secretbox;
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2018-02-24 23:46:52 -08:00
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2018-03-24 21:03:59 -07:00
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pub struct SymCT {
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nonce: secretbox::Nonce,
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ciphertext: Vec<u8>
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}
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2018-03-24 21:03:59 -07:00
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impl fmt::Display for SymCT {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let mut y_s = String::new();
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for y in self.ciphertext.iter() {
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2018-03-24 06:44:45 -07:00
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y_s = format!("{}{:x}", y_s, y);
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}
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2018-03-24 21:03:59 -07:00
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write!(f, "CT : (ct=0x{})", y_s)
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2018-03-24 06:44:45 -07:00
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}
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}
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#[derive(Clone)]
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2018-03-24 21:03:59 -07:00
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pub struct SymKey {
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key: secretbox::Key,
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l: i32
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}
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2018-03-24 21:03:59 -07:00
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pub fn init() {
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sodiumoxide::init();
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2018-03-24 06:44:45 -07:00
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}
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2018-03-24 21:03:59 -07:00
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pub fn keygen(l: i32) -> SymKey {
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// TODO: make sure key is a l-bit key
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return SymKey { key: secretbox::gen_key(), l: l };
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}
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2018-03-24 21:03:59 -07:00
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pub fn encrypt(key: &SymKey, plaintext: &String) -> SymCT {
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let nonce = secretbox::gen_nonce();
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let pt = plaintext.as_bytes();
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let ct = secretbox::seal(pt, &nonce, &key.key);
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return SymCT { nonce: nonce, ciphertext: ct };
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2018-03-24 06:44:45 -07:00
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}
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2018-03-24 21:03:59 -07:00
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pub fn decrypt(key: &SymKey, ciphertext: &SymCT) -> String {
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let nonce = ciphertext.nonce;
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let pt = secretbox::open(&ciphertext.ciphertext, &nonce, &key.key).unwrap();
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// TODO: investigate better error handling here
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let plaintext = String::from_utf8(pt).expect("Found invalid UTF-8");
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return plaintext;
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2018-03-24 06:44:45 -07:00
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}
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2018-02-24 23:46:52 -08:00
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}
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2018-03-24 21:03:59 -07:00
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////////////////////////////////// SymKeyEnc ///////////////////////////////////
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2018-03-24 06:44:45 -07:00
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2018-03-24 21:03:59 -07:00
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////////////////////////////////// OTEnc ///////////////////////////////////////
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2018-03-24 06:44:45 -07:00
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2018-03-24 21:03:59 -07:00
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// TODO: implement this next
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pub mod ot {
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2018-03-24 06:44:45 -07:00
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2018-03-24 21:03:59 -07:00
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}
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2018-03-24 06:44:45 -07:00
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2018-03-24 21:03:59 -07:00
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////////////////////////////////// OTEnc ///////////////////////////////////////
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2018-03-24 06:44:45 -07:00
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2018-03-24 21:03:59 -07:00
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////////////////////////////////// CL Sigs /////////////////////////////////////
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2018-03-24 06:44:45 -07:00
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2018-03-24 21:03:59 -07:00
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pub mod clsigs;
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pub mod commit_scheme;
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//pub mod clsigs {
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// use std::fmt;
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// use std::str;
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// //use std::default;
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// use rand;
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// use bn::{Group, Fr, G1, G2, pairing};
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// //use debug_elem_in_hex;
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// use bincode::SizeLimit::Infinite;
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// use bincode::rustc_serialize::encode;
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// use sodiumoxide::crypto::hash::sha512;
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//
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// pub struct PublicParams {
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// g: G1
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// }
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//
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// pub struct PublicKey {
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// X: G1,
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// Y: G1
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// }
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//
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// impl fmt::Display for PublicKey {
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// fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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// let x_vec: Vec<u8> = encode(&self.X, Infinite).unwrap();
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// let y_vec: Vec<u8> = encode(&self.Y, Infinite).unwrap();
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// let mut x_s = String::new();
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// for x in x_vec.iter() {
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// x_s = format!("{}{:x}", x_s, x);
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// }
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//
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// let mut y_s = String::new();
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// for y in y_vec.iter() {
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// y_s = format!("{}{:x}", y_s, y);
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// }
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//
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// write!(f, "PK : (X=0x{}, Y=0x{})", x_s, y_s)
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// }
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// }
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//
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// #[derive(Copy, Clone)]
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// pub struct SecretKey {
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// x: Fr,
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// y: Fr
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// }
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//
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// impl SecretKey {
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// pub fn encode(&self) -> Vec<u8> {
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// let mut output_buf = Vec::new();
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// let x_vec: Vec<u8> = encode(&self.x, Infinite).unwrap();
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// let y_vec: Vec<u8> = encode(&self.y, Infinite).unwrap();
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// output_buf.extend(x_vec);
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// output_buf.extend(y_vec);
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// return output_buf;
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// }
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// }
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//
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// pub struct KeyPair {
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// pub sk: SecretKey,
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// pub pk: PublicKey
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// }
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//
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// pub struct Signature {
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// a: G2,
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// b: G2,
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// c: G2
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// }
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//
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// impl fmt::Display for Signature {
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// fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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// let a_vec: Vec<u8> = encode(&self.a, Infinite).unwrap();
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// let b_vec: Vec<u8> = encode(&self.b, Infinite).unwrap();
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// let c_vec: Vec<u8> = encode(&self.c, Infinite).unwrap();
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// let mut a_s = String::new();
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// for x in a_vec.iter() {
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// a_s = format!("{}{:x}", a_s, x);
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// }
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//
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// let mut b_s = String::new();
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// for y in b_vec.iter() {
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// b_s = format!("{}{:x}", b_s, y);
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// }
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//
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// let mut c_s = String::new();
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// for y in c_vec.iter() {
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// c_s = format!("{}{:x}", c_s, y);
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// }
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//
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// write!(f, "Signature : (\na = 0x{},\nb = 0x{},\nc = 0x{}\n)", a_s, b_s, c_s)
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// }
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// }
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//
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// #[derive(Clone)]
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// pub struct Message<'a> {
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// prefix: &'a str, // string prefix for the prefix
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// c_id: Fr, // uniquely identifies the
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// index: i32, // index
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// // ck: Fr, // TODO: l-bit key (from SymKeyEnc)
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// }
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//
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// impl<'a> Message<'a> {
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// pub fn new(_prefix: &str, _c_id: Fr, _index: i32) -> Message {
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// Message {
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// prefix: _prefix, c_id: _c_id, index: _index,
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// }
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// }
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//
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// fn hash(&self) -> Fr {
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// let mut input_buf = Vec::new();
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// input_buf.extend_from_slice(self.prefix.as_bytes());
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// let c_id_vec: Vec<u8> = encode(&self.c_id, Infinite).unwrap();
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// // encode cId in the vector
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// input_buf.extend(c_id_vec);
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// // encoee the balance as a hex string
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// let b = format!("{:x}", self.index);
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// input_buf.extend_from_slice(b.as_bytes());
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// // TODO: add the ck vector (l-bit key)
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// // let mut in_str = String::new();
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// // for y in input_buf.iter() {
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// // in_str = format!("{}{:x}", in_str, y);
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// // }
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// // println!("input_buf: {}", in_str);
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//
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// // hash the inputs via SHA256
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// let sha2_digest = sha512::hash(input_buf.as_slice());
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// // println!("hash: {:?}", sha2_digest);
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// // let h = format!("{:x}", HexSlice::new(&sha2_digest));
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// let mut hash_buf: [u8; 64] = [0; 64];
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// hash_buf.copy_from_slice(&sha2_digest[0..64]);
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// return Fr::interpret(&hash_buf);
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// }
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// }
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//
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//
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// pub fn setup() -> PublicParams {
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// let rng = &mut rand::thread_rng();
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// let g = G1::random(rng);
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// let mpk = PublicParams { g: g };
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// return mpk;
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// }
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//
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// pub fn keygen(mpk : &PublicParams) -> KeyPair {
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// let rng = &mut rand::thread_rng();
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// let x = Fr::random(rng);
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// let y = Fr::random(rng);
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// let sk = SecretKey { x: x, y: y };
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// let pk = PublicKey { X: mpk.g * x,
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// Y: mpk.g * y
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// };
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// return KeyPair { sk: sk, pk: pk }
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// }
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//
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// pub fn sign(sk: &SecretKey, msg: &Message) -> Signature {
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// let rng = &mut rand::thread_rng();
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// let a = G2::random(rng);
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// let m = msg.hash();
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// let b = a * sk.y;
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// let c = a * (sk.x + (m * sk.x * sk.y));
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// let sig = Signature { a: a, b: b, c: c };
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// return sig;
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// }
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//
|
|
|
|
// pub fn verify(mpk: &PublicParams, pk: &PublicKey, msg: &Message, sig: &Signature) -> bool {
|
|
|
|
// let m = msg.hash();
|
|
|
|
// let lhs1 = pairing(pk.Y, sig.a);
|
|
|
|
// let rhs1 = pairing(mpk.g, sig.b);
|
|
|
|
// let lhs2 = pairing(pk.X, sig.a) * (pairing(pk.X, sig.b).pow(m));
|
|
|
|
// let rhs2 = pairing(mpk.g, sig.c);
|
|
|
|
// return (lhs1 == rhs1) && (lhs2 == rhs2);
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
//}
|
2018-03-24 06:44:45 -07:00
|
|
|
|
2018-03-24 21:03:59 -07:00
|
|
|
#[derive(Clone)]
|
|
|
|
pub struct RefundMessage<'a> {
|
|
|
|
prefix: &'a str, // string prefix for the prefix
|
|
|
|
c_id: Fr, // uniquely identifies the
|
|
|
|
index: i32, // index
|
|
|
|
// ck: Fr, // TODO: l-bit key (from SymKeyEnc)
|
|
|
|
}
|
2018-02-24 23:46:52 -08:00
|
|
|
|
2018-03-24 21:03:59 -07:00
|
|
|
impl<'a> RefundMessage<'a> {
|
|
|
|
pub fn new(_c_id: Fr, _index: i32) -> RefundMessage<'a> {
|
|
|
|
RefundMessage {
|
|
|
|
prefix: "refund", c_id: _c_id, index: _index,
|
2018-03-24 06:44:45 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-03-24 21:03:59 -07:00
|
|
|
pub fn hash(&self) -> Fr {
|
|
|
|
let mut input_buf = Vec::new();
|
|
|
|
input_buf.extend_from_slice(self.prefix.as_bytes());
|
|
|
|
let c_id_vec: Vec<u8> = encode(&self.c_id, Infinite).unwrap();
|
|
|
|
// encode cId in the vector
|
|
|
|
input_buf.extend(c_id_vec);
|
|
|
|
// encoee the balance as a hex string
|
|
|
|
let b = format!("{:x}", self.index);
|
|
|
|
input_buf.extend_from_slice(b.as_bytes());
|
|
|
|
// TODO: add the ck vector (l-bit key)
|
|
|
|
// let mut in_str = String::new();
|
|
|
|
// for y in input_buf.iter() {
|
|
|
|
// in_str = format!("{}{:x}", in_str, y);
|
|
|
|
// }
|
|
|
|
// println!("input_buf: {}", in_str);
|
|
|
|
|
|
|
|
// hash the inputs via SHA256
|
|
|
|
let sha2_digest = sha512::hash(input_buf.as_slice());
|
|
|
|
// println!("hash: {:?}", sha2_digest);
|
|
|
|
// let h = format!("{:x}", HexSlice::new(&sha2_digest));
|
|
|
|
let mut hash_buf: [u8; 64] = [0; 64];
|
|
|
|
hash_buf.copy_from_slice(&sha2_digest[0..64]);
|
|
|
|
return Fr::interpret(&hash_buf);
|
2018-03-24 06:44:45 -07:00
|
|
|
}
|
2018-03-24 21:03:59 -07:00
|
|
|
}
|
2018-03-24 06:44:45 -07:00
|
|
|
|
2018-03-24 21:03:59 -07:00
|
|
|
////////////////////////////////// CL Sigs /////////////////////////////////////
|
2018-03-24 06:44:45 -07:00
|
|
|
|
2018-03-24 21:03:59 -07:00
|
|
|
////////////////////////////////// COMMITMENT //////////////////////////////////
|
|
|
|
|
|
|
|
#[derive(Copy, Clone)]
|
|
|
|
pub struct Message {
|
|
|
|
sk: clsigs::SecretKey, // the secret key for the signature scheme (Is it possible to make this a generic field?)
|
|
|
|
k1: Fr, // seed 1 for PRF
|
|
|
|
k2: Fr, // seed 2 for PRF
|
|
|
|
balance: i32 // the balance for the user
|
|
|
|
}
|
2018-03-24 06:44:45 -07:00
|
|
|
|
2018-03-24 21:03:59 -07:00
|
|
|
impl Message {
|
|
|
|
pub fn new(_sk: clsigs::SecretKey, _k1: Fr, _k2: Fr, _balance: i32) -> Message {
|
|
|
|
Message {
|
|
|
|
sk: _sk, k1: _k1, k2: _k2, balance: _balance,
|
2018-03-24 06:44:45 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2018-03-24 21:03:59 -07:00
|
|
|
fn hash(&self) -> Fr {
|
|
|
|
let mut input_buf = self.sk.encode();
|
|
|
|
// TODO: add sk_sigs to encode it
|
|
|
|
let k1_vec: Vec<u8> = encode(&self.k1, Infinite).unwrap();
|
|
|
|
let k2_vec: Vec<u8> = encode(&self.k2, Infinite).unwrap();
|
|
|
|
// encode k1 in the vector
|
|
|
|
input_buf.extend(k1_vec);
|
|
|
|
// encode k2 in the vector
|
|
|
|
input_buf.extend(k2_vec);
|
|
|
|
// encoee the balance as a hex string
|
|
|
|
let b = format!("{:x}", self.balance);
|
|
|
|
// println!("Balance: {}", b);
|
|
|
|
input_buf.extend_from_slice(b.as_bytes());
|
|
|
|
// let mut in_str = String::new();
|
|
|
|
// for y in input_buf.iter() {
|
|
|
|
// in_str = format!("{}{:x}", in_str, y);
|
|
|
|
// }
|
|
|
|
// println!("input_buf: {}", in_str);
|
|
|
|
|
|
|
|
// hash the inputs via SHA256
|
|
|
|
let sha2_digest = sha512::hash(input_buf.as_slice());
|
|
|
|
// println!("hash: {:?}", sha2_digest);
|
|
|
|
// let h = format!("{:x}", HexSlice::new(&sha2_digest));
|
|
|
|
let mut hash_buf: [u8; 64] = [0; 64];
|
|
|
|
hash_buf.copy_from_slice(&sha2_digest[0..64]);
|
|
|
|
return Fr::interpret(&hash_buf);
|
2018-03-24 06:44:45 -07:00
|
|
|
}
|
2018-03-24 21:03:59 -07:00
|
|
|
}
|
2018-03-24 06:44:45 -07:00
|
|
|
|
|
|
|
|
2018-03-24 21:03:59 -07:00
|
|
|
//pub mod commit_scheme {
|
|
|
|
// use std::fmt;
|
|
|
|
// use rand;
|
|
|
|
// //use std::str;
|
|
|
|
// //use std::default;
|
|
|
|
// use bn::{Group, Fr, G1};
|
|
|
|
// use debug_elem_in_hex;
|
|
|
|
// use bincode::SizeLimit::Infinite;
|
|
|
|
// use bincode::rustc_serialize::encode;
|
|
|
|
// use sodiumoxide::crypto::hash::sha512;
|
|
|
|
// use clsigs;
|
|
|
|
// // define some structures here
|
|
|
|
// #[derive(Copy, Clone)]
|
|
|
|
// pub struct PublicKey {
|
|
|
|
// g: G1,
|
|
|
|
// h: G1
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
// #[derive(Copy, Clone)]
|
|
|
|
// pub struct Commitment {
|
|
|
|
// c: G1,
|
|
|
|
// d: Fr
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
// impl fmt::Display for PublicKey {
|
|
|
|
// fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
|
|
// let g_vec: Vec<u8> = encode(&self.g, Infinite).unwrap();
|
|
|
|
// let h_vec: Vec<u8> = encode(&self.h, Infinite).unwrap();
|
|
|
|
// let mut g_s = String::new();
|
|
|
|
// for x in g_vec.iter() {
|
|
|
|
// g_s = format!("{}{:x}", g_s, x);
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
// let mut h_s = String::new();
|
|
|
|
// for y in h_vec.iter() {
|
|
|
|
// h_s = format!("{}{:x}", h_s, y);
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
// write!(f, "PK : (g=0x{}, h=0x{})", g_s, h_s)
|
|
|
|
// }
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// impl fmt::Display for Commitment {
|
|
|
|
// fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
|
|
// let c_vec: Vec<u8> = encode(&self.c, Infinite).unwrap();
|
|
|
|
// let mut c_s = String::new();
|
|
|
|
// for x in c_vec.iter() {
|
|
|
|
// c_s = format!("{}{:x}", c_s, x);
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
// let d_vec: Vec<u8> = encode(&self.d, Infinite).unwrap();
|
|
|
|
// let mut d_s = String::new();
|
|
|
|
// for x in d_vec.iter() {
|
|
|
|
// d_s = format!("{}{:x}", d_s, x);
|
|
|
|
// }
|
|
|
|
// write!(f, "Commitment : (c=0x{}, d=0x{})", c_s, d_s)
|
|
|
|
// }
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
// #[derive(Copy, Clone)]
|
|
|
|
// pub struct Message {
|
|
|
|
// sk: clsigs::SecretKey, // the secret key for the signature scheme (Is it possible to make this a generic field?)
|
|
|
|
// k1: Fr, // seed 1 for PRF
|
|
|
|
// k2: Fr, // seed 2 for PRF
|
|
|
|
// balance: i32 // the balance for the user
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
// impl Message {
|
|
|
|
// pub fn new(_sk: clsigs::SecretKey, _k1: Fr, _k2: Fr, _balance: i32) -> Message {
|
|
|
|
// Message {
|
|
|
|
// sk: _sk, k1: _k1, k2: _k2, balance: _balance,
|
|
|
|
// }
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
// fn hash(&self) -> Fr {
|
|
|
|
// let mut input_buf = self.sk.encode();
|
|
|
|
// // TODO: add sk_sigs to encode it
|
|
|
|
// let k1_vec: Vec<u8> = encode(&self.k1, Infinite).unwrap();
|
|
|
|
// let k2_vec: Vec<u8> = encode(&self.k2, Infinite).unwrap();
|
|
|
|
// // encode k1 in the vector
|
|
|
|
// input_buf.extend(k1_vec);
|
|
|
|
// // encode k2 in the vector
|
|
|
|
// input_buf.extend(k2_vec);
|
|
|
|
// // encoee the balance as a hex string
|
|
|
|
// let b = format!("{:x}", self.balance);
|
|
|
|
// // println!("Balance: {}", b);
|
|
|
|
// input_buf.extend_from_slice(b.as_bytes());
|
|
|
|
// // let mut in_str = String::new();
|
|
|
|
// // for y in input_buf.iter() {
|
|
|
|
// // in_str = format!("{}{:x}", in_str, y);
|
|
|
|
// // }
|
|
|
|
// // println!("input_buf: {}", in_str);
|
|
|
|
//
|
|
|
|
// // hash the inputs via SHA256
|
|
|
|
// let sha2_digest = sha512::hash(input_buf.as_slice());
|
|
|
|
// // println!("hash: {:?}", sha2_digest);
|
|
|
|
// // let h = format!("{:x}", HexSlice::new(&sha2_digest));
|
|
|
|
// let mut hash_buf: [u8; 64] = [0; 64];
|
|
|
|
// hash_buf.copy_from_slice(&sha2_digest[0..64]);
|
|
|
|
// return Fr::interpret(&hash_buf);
|
|
|
|
// }
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// /*
|
|
|
|
// Implements the setup algorithm for the Pedersen92 commitment scheme
|
|
|
|
// */
|
|
|
|
// pub fn setup() -> PublicKey {
|
|
|
|
// println!("Run Setup...");
|
|
|
|
// let rng = &mut rand::thread_rng();
|
|
|
|
// let g = G1::random(rng);
|
|
|
|
// let h = G1::random(rng);
|
|
|
|
// let pk = PublicKey { g: g, h: h };
|
|
|
|
// println!("{}", pk);
|
|
|
|
// return pk;
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
// /*
|
|
|
|
// commit(pk, msg) -> cm where
|
|
|
|
// - pk is the public key generated from setup()
|
|
|
|
// - msg is the message structure for the commitment scheme
|
|
|
|
// - cm is the output commitment message for the given message
|
|
|
|
// */
|
|
|
|
// pub fn commit(pk: &PublicKey, msg: &Message) -> Commitment {
|
|
|
|
// let rng = &mut rand::thread_rng();
|
|
|
|
//
|
|
|
|
// let r = Fr::random(rng);
|
|
|
|
//
|
|
|
|
// let m = msg.hash();
|
|
|
|
// let p = "commit -> m";
|
|
|
|
// debug_elem_in_hex(p, &m);
|
|
|
|
//
|
|
|
|
// let c = (pk.g * m) + (pk.h * r);
|
|
|
|
// // return (c, r) <- d=r
|
|
|
|
// let commitment = Commitment { c: c, d: r };
|
|
|
|
//
|
|
|
|
// // debugging
|
|
|
|
// println!("{}", commitment);
|
|
|
|
// return commitment;
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
// /*
|
|
|
|
// decommit(pk, cm, msg) -> bool where
|
|
|
|
// - pk is the public key generated from setup()
|
|
|
|
// - cm is the commitment
|
|
|
|
// - msg is the message to validate
|
|
|
|
// - outputs T/F for whether the cm is a valid commitmentt to the msg
|
|
|
|
// */
|
|
|
|
// pub fn decommit(pk: &PublicKey, cm: &Commitment, msg: &Message) -> bool {
|
|
|
|
// let m = msg.hash();
|
|
|
|
// let p = "decommit -> m";
|
|
|
|
// debug_elem_in_hex(p, &m);
|
|
|
|
//
|
|
|
|
// let dm = (pk.g * m) + (pk.h * cm.d);
|
|
|
|
// return dm == cm.c;
|
|
|
|
// }
|
|
|
|
//
|
|
|
|
//}
|
2018-03-24 06:44:45 -07:00
|
|
|
////////////////////////////////// COMMITMENT //////////////////////////////////
|
2018-02-24 23:46:52 -08:00
|
|
|
|
|
|
|
//pub fn keygen() {
|
|
|
|
// println!("Run Keygen...");
|
|
|
|
//}
|
|
|
|
//
|
|
|
|
//pub fn init() {
|
|
|
|
// println!("Run Init...");
|
|
|
|
//
|
|
|
|
//}
|
|
|
|
//
|
|
|
|
//pub fn refund() {
|
|
|
|
// println!("Run Refund...");
|
|
|
|
//
|
|
|
|
//}
|
|
|
|
//
|
|
|
|
//pub fn refute() {
|
|
|
|
// println!("Run Refute...");
|
|
|
|
//
|
|
|
|
//}
|
|
|
|
//
|
|
|
|
//pub fn resolve() {
|
|
|
|
// println!("Run Resolve...");
|
|
|
|
//
|
|
|
|
//}
|