Merge pull request #4999 from paritytech/eip-213

EIP-213 (bn128 curve operations)
This commit is contained in:
Robert Habermeier 2017-03-31 14:54:07 +02:00 committed by GitHub
commit d146ae7275
8 changed files with 290 additions and 49 deletions

12
Cargo.lock generated
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@ -177,6 +177,16 @@ name = "bloomchain"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "bn"
version = "0.4.3"
source = "git+https://github.com/paritytech/bn#59d848e642ad1ff0d60e39348576a6f11ee123b8"
dependencies = [
"byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
"rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
"rustc-serialize 0.3.19 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "byteorder"
version = "1.0.0"
@ -377,6 +387,7 @@ version = "1.7.0"
dependencies = [
"bit-set 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
"bloomchain 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
"bn 0.4.3 (git+https://github.com/paritytech/bn)",
"byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
"clippy 0.0.103 (registry+https://github.com/rust-lang/crates.io-index)",
"crossbeam 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
@ -2631,6 +2642,7 @@ dependencies = [
"checksum bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "aad18937a628ec6abcd26d1489012cc0e18c21798210f491af69ded9b881106d"
"checksum blastfig 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "09640e0509d97d5cdff03a9f5daf087a8e04c735c3b113a75139634a19cfc7b2"
"checksum bloomchain 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3f421095d2a76fc24cd3fb3f912b90df06be7689912b1bdb423caefae59c258d"
"checksum bn 0.4.3 (git+https://github.com/paritytech/bn)" = "<none>"
"checksum byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c40977b0ee6b9885c9013cd41d9feffdd22deb3bb4dc3a71d901cc7a77de18c8"
"checksum bytes 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c129aff112dcc562970abb69e2508b40850dd24c274761bb50fb8a0067ba6c27"
"checksum bytes 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "46112a0060ae15e3a3f9a445428a53e082b91215b744fa27a1948842f4a64b96"

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@ -48,6 +48,7 @@ ethcore-logger = { path = "../logger" }
stats = { path = "../util/stats" }
hyper = { git = "https://github.com/paritytech/hyper", default-features = false }
num = "0.1"
bn = { git = "https://github.com/paritytech/bn" }
[features]
jit = ["evmjit"]

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@ -190,6 +190,8 @@
"0000000000000000000000000000000000000003": { "builtin": { "name": "ripemd160", "pricing": { "linear": { "base": 600, "word": 120 } } } },
"0000000000000000000000000000000000000004": { "builtin": { "name": "identity", "pricing": { "linear": { "base": 15, "word": 3 } } } },
"0000000000000000000000000000000000000005": { "builtin": { "name": "modexp", "activate_at": "0x7fffffffffffff", "pricing": { "modexp": { "divisor": 20 } } } },
"0000000000000000000000000000000000000006": { "builtin": { "name": "bn128_add", "activate_at": "0x7fffffffffffff", "pricing": { "linear": { "base": 999999, "word": 0 } } } },
"0000000000000000000000000000000000000007": { "builtin": { "name": "bn128_mul", "activate_at": "0x7fffffffffffff", "pricing": { "linear": { "base": 999999, "word": 0 } } } },
"3282791d6fd713f1e94f4bfd565eaa78b3a0599d": {
"balance": "1337000000000000000000"
},

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@ -27,10 +27,19 @@ use util::{U256, H256, Uint, Hashable, BytesRef};
use ethkey::{Signature, recover as ec_recover};
use ethjson;
#[derive(Debug)]
pub struct Error(pub &'static str);
impl From<&'static str> for Error {
fn from(val: &'static str) -> Self {
Error(val)
}
}
/// Native implementation of a built-in contract.
pub trait Impl: Send + Sync {
/// execute this built-in on the given input, writing to the given output.
fn execute(&self, input: &[u8], output: &mut BytesRef);
fn execute(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error>;
}
/// A gas pricing scheme for built-in contracts.
@ -102,7 +111,9 @@ impl Builtin {
pub fn cost(&self, input: &[u8]) -> U256 { self.pricer.cost(input) }
/// Simple forwarder for execute.
pub fn execute(&self, input: &[u8], output: &mut BytesRef) { self.native.execute(input, output) }
pub fn execute(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error> {
self.native.execute(input, output)
}
/// Whether the builtin is activated at the given block number.
pub fn is_active(&self, at: u64) -> bool { at >= self.activate_at }
@ -145,6 +156,8 @@ fn ethereum_builtin(name: &str) -> Box<Impl> {
"sha256" => Box::new(Sha256) as Box<Impl>,
"ripemd160" => Box::new(Ripemd160) as Box<Impl>,
"modexp" => Box::new(ModexpImpl) as Box<Impl>,
"bn128_add" => Box::new(Bn128AddImpl) as Box<Impl>,
"bn128_mul" => Box::new(Bn128MulImpl) as Box<Impl>,
_ => panic!("invalid builtin name: {}", name),
}
}
@ -172,14 +185,21 @@ struct Ripemd160;
#[derive(Debug)]
struct ModexpImpl;
#[derive(Debug)]
struct Bn128AddImpl;
#[derive(Debug)]
struct Bn128MulImpl;
impl Impl for Identity {
fn execute(&self, input: &[u8], output: &mut BytesRef) {
fn execute(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error> {
output.write(0, input);
Ok(())
}
}
impl Impl for EcRecover {
fn execute(&self, i: &[u8], output: &mut BytesRef) {
fn execute(&self, i: &[u8], output: &mut BytesRef) -> Result<(), Error> {
let len = min(i.len(), 128);
let mut input = [0; 128];
@ -192,7 +212,7 @@ impl Impl for EcRecover {
let bit = match v[31] {
27 | 28 if &v.0[..31] == &[0; 31] => v[31] - 27,
_ => return,
_ => { return Ok(()); },
};
let s = Signature::from_rsv(&r, &s, bit);
@ -203,11 +223,13 @@ impl Impl for EcRecover {
output.write(12, &r[12..r.len()]);
}
}
Ok(())
}
}
impl Impl for Sha256 {
fn execute(&self, input: &[u8], output: &mut BytesRef) {
fn execute(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error> {
let mut sha = Sha256Digest::new();
sha.input(input);
@ -215,11 +237,13 @@ impl Impl for Sha256 {
sha.result(&mut out);
output.write(0, &out);
Ok(())
}
}
impl Impl for Ripemd160 {
fn execute(&self, input: &[u8], output: &mut BytesRef) {
fn execute(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error> {
let mut sha = Ripemd160Digest::new();
sha.input(input);
@ -227,11 +251,13 @@ impl Impl for Ripemd160 {
sha.result(&mut out[12..32]);
output.write(0, &out);
Ok(())
}
}
impl Impl for ModexpImpl {
fn execute(&self, input: &[u8], output: &mut BytesRef) {
fn execute(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error> {
let mut reader = input.chain(io::repeat(0));
let mut buf = [0; 32];
@ -294,6 +320,76 @@ impl Impl for ModexpImpl {
let res_start = mod_len - bytes.len();
output.write(res_start, &bytes);
}
Ok(())
}
}
fn read_fr(reader: &mut io::Chain<&[u8], io::Repeat>) -> Result<::bn::Fr, Error> {
let mut buf = [0u8; 32];
reader.read_exact(&mut buf[..]).expect("reading from zero-extended memory cannot fail; qed");
::bn::Fr::from_slice(&buf[0..32]).map_err(|_| Error::from("Invalid field element"))
}
fn read_point(reader: &mut io::Chain<&[u8], io::Repeat>) -> Result<::bn::G1, Error> {
use bn::{Fq, AffineG1, G1, Group};
let mut buf = [0u8; 32];
reader.read_exact(&mut buf[..]).expect("reading from zero-extended memory cannot fail; qed");
let px = Fq::from_slice(&buf[0..32]).map_err(|_| Error::from("Invalid point x coordinate"))?;
reader.read_exact(&mut buf[..]).expect("reading from zero-extended memory cannot fail; qed");
let py = Fq::from_slice(&buf[0..32]).map_err(|_| Error::from("Invalid point x coordinate"))?;
Ok(
if px == Fq::zero() && py == Fq::zero() {
G1::zero()
} else {
AffineG1::new(px, py).map_err(|_| Error::from("Invalid curve point"))?.into()
}
)
}
impl Impl for Bn128AddImpl {
// Can fail if any of the 2 points does not belong the bn128 curve
fn execute(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error> {
use bn::AffineG1;
let mut padded_input = input.chain(io::repeat(0));
let p1 = read_point(&mut padded_input)?;
let p2 = read_point(&mut padded_input)?;
let mut write_buf = [0u8; 64];
if let Some(sum) = AffineG1::from_jacobian(p1 + p2) {
// point not at infinity
sum.x().to_big_endian(&mut write_buf[0..32]).expect("Cannot fail since 0..32 is 32-byte length");
sum.y().to_big_endian(&mut write_buf[32..64]).expect("Cannot fail since 32..64 is 32-byte length");;
}
output.write(0, &write_buf);
Ok(())
}
}
impl Impl for Bn128MulImpl {
// Can fail if first paramter (bn128 curve point) does not actually belong to the curve
fn execute(&self, input: &[u8], output: &mut BytesRef) -> Result<(), Error> {
use bn::AffineG1;
let mut padded_input = input.chain(io::repeat(0));
let p = read_point(&mut padded_input)?;
let fr = read_fr(&mut padded_input)?;
let mut write_buf = [0u8; 64];
if let Some(sum) = AffineG1::from_jacobian(p * fr) {
// point not at infinity
sum.x().to_big_endian(&mut write_buf[0..32]).expect("Cannot fail since 0..32 is 32-byte length");
sum.y().to_big_endian(&mut write_buf[32..64]).expect("Cannot fail since 32..64 is 32-byte length");;
}
output.write(0, &write_buf);
Ok(())
}
}
@ -310,15 +406,15 @@ mod tests {
let i = [0u8, 1, 2, 3];
let mut o2 = [255u8; 2];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o2[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o2[..])).expect("Builtin should not fail");
assert_eq!(i[0..2], o2);
let mut o4 = [255u8; 4];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o4[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o4[..])).expect("Builtin should not fail");
assert_eq!(i, o4);
let mut o8 = [255u8; 8];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o8[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o8[..])).expect("Builtin should not fail");
assert_eq!(i, o8[..4]);
assert_eq!([255u8; 4], o8[4..]);
}
@ -331,19 +427,19 @@ mod tests {
let i = [0u8; 0];
let mut o = [255u8; 32];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o[..])).expect("Builtin should not fail");
assert_eq!(&o[..], &(FromHex::from_hex("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855").unwrap())[..]);
let mut o8 = [255u8; 8];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o8[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o8[..])).expect("Builtin should not fail");
assert_eq!(&o8[..], &(FromHex::from_hex("e3b0c44298fc1c14").unwrap())[..]);
let mut o34 = [255u8; 34];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o34[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o34[..])).expect("Builtin should not fail");
assert_eq!(&o34[..], &(FromHex::from_hex("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855ffff").unwrap())[..]);
let mut ov = vec![];
f.execute(&i[..], &mut BytesRef::Flexible(&mut ov));
f.execute(&i[..], &mut BytesRef::Flexible(&mut ov)).expect("Builtin should not fail");
assert_eq!(&ov[..], &(FromHex::from_hex("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855").unwrap())[..]);
}
@ -355,15 +451,15 @@ mod tests {
let i = [0u8; 0];
let mut o = [255u8; 32];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o[..])).expect("Builtin should not fail");
assert_eq!(&o[..], &(FromHex::from_hex("0000000000000000000000009c1185a5c5e9fc54612808977ee8f548b2258d31").unwrap())[..]);
let mut o8 = [255u8; 8];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o8[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o8[..])).expect("Builtin should not fail");
assert_eq!(&o8[..], &(FromHex::from_hex("0000000000000000").unwrap())[..]);
let mut o34 = [255u8; 34];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o34[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o34[..])).expect("Builtin should not fail");
assert_eq!(&o34[..], &(FromHex::from_hex("0000000000000000000000009c1185a5c5e9fc54612808977ee8f548b2258d31ffff").unwrap())[..]);
}
@ -383,40 +479,40 @@ mod tests {
let i = FromHex::from_hex("47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad000000000000000000000000000000000000000000000000000000000000001b650acf9d3f5f0a2c799776a1254355d5f4061762a237396a99a0e0e3fc2bcd6729514a0dacb2e623ac4abd157cb18163ff942280db4d5caad66ddf941ba12e03").unwrap();
let mut o = [255u8; 32];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o[..])).expect("Builtin should not fail");
assert_eq!(&o[..], &(FromHex::from_hex("000000000000000000000000c08b5542d177ac6686946920409741463a15dddb").unwrap())[..]);
let mut o8 = [255u8; 8];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o8[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o8[..])).expect("Builtin should not fail");
assert_eq!(&o8[..], &(FromHex::from_hex("0000000000000000").unwrap())[..]);
let mut o34 = [255u8; 34];
f.execute(&i[..], &mut BytesRef::Fixed(&mut o34[..]));
f.execute(&i[..], &mut BytesRef::Fixed(&mut o34[..])).expect("Builtin should not fail");
assert_eq!(&o34[..], &(FromHex::from_hex("000000000000000000000000c08b5542d177ac6686946920409741463a15dddbffff").unwrap())[..]);
let i_bad = FromHex::from_hex("47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad000000000000000000000000000000000000000000000000000000000000001a650acf9d3f5f0a2c799776a1254355d5f4061762a237396a99a0e0e3fc2bcd6729514a0dacb2e623ac4abd157cb18163ff942280db4d5caad66ddf941ba12e03").unwrap();
let mut o = [255u8; 32];
f.execute(&i_bad[..], &mut BytesRef::Fixed(&mut o[..]));
f.execute(&i_bad[..], &mut BytesRef::Fixed(&mut o[..])).expect("Builtin should not fail");
assert_eq!(&o[..], &(FromHex::from_hex("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap())[..]);
let i_bad = FromHex::from_hex("47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad000000000000000000000000000000000000000000000000000000000000001b000000000000000000000000000000000000000000000000000000000000001b0000000000000000000000000000000000000000000000000000000000000000").unwrap();
let mut o = [255u8; 32];
f.execute(&i_bad[..], &mut BytesRef::Fixed(&mut o[..]));
f.execute(&i_bad[..], &mut BytesRef::Fixed(&mut o[..])).expect("Builtin should not fail");
assert_eq!(&o[..], &(FromHex::from_hex("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap())[..]);
let i_bad = FromHex::from_hex("47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad000000000000000000000000000000000000000000000000000000000000001b0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001b").unwrap();
let mut o = [255u8; 32];
f.execute(&i_bad[..], &mut BytesRef::Fixed(&mut o[..]));
f.execute(&i_bad[..], &mut BytesRef::Fixed(&mut o[..])).expect("Builtin should not fail");
assert_eq!(&o[..], &(FromHex::from_hex("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap())[..]);
let i_bad = FromHex::from_hex("47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad000000000000000000000000000000000000000000000000000000000000001bffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff000000000000000000000000000000000000000000000000000000000000001b").unwrap();
let mut o = [255u8; 32];
f.execute(&i_bad[..], &mut BytesRef::Fixed(&mut o[..]));
f.execute(&i_bad[..], &mut BytesRef::Fixed(&mut o[..])).expect("Builtin should not fail");
assert_eq!(&o[..], &(FromHex::from_hex("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap())[..]);
let i_bad = FromHex::from_hex("47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad000000000000000000000000000000000000000000000000000000000000001b000000000000000000000000000000000000000000000000000000000000001bffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap();
let mut o = [255u8; 32];
f.execute(&i_bad[..], &mut BytesRef::Fixed(&mut o[..]));
f.execute(&i_bad[..], &mut BytesRef::Fixed(&mut o[..])).expect("Builtin should not fail");
assert_eq!(&o[..], &(FromHex::from_hex("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap())[..]);
// TODO: Should this (corrupted version of the above) fail rather than returning some address?
@ -450,7 +546,7 @@ mod tests {
let expected = FromHex::from_hex("0000000000000000000000000000000000000000000000000000000000000001").unwrap();
let expected_cost = 1638;
f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..]));
f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..])).expect("Builtin should not fail");
assert_eq!(output, expected);
assert_eq!(f.cost(&input[..]), expected_cost.into());
}
@ -469,7 +565,7 @@ mod tests {
let expected = FromHex::from_hex("0000000000000000000000000000000000000000000000000000000000000000").unwrap();
let expected_cost = 1638;
f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..]));
f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..])).expect("Builtin should not fail");
assert_eq!(output, expected);
assert_eq!(f.cost(&input[..]), expected_cost.into());
}
@ -489,7 +585,7 @@ mod tests {
let expected = FromHex::from_hex("3b01b01ac41f2d6e917c6d6a221ce793802469026d9ab7578fa2e79e4da6aaab").unwrap();
let expected_cost = 102;
f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..]));
f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..])).expect("Builtin should not fail");
assert_eq!(output, expected);
assert_eq!(f.cost(&input[..]), expected_cost.into());
}
@ -507,12 +603,118 @@ mod tests {
let mut output = vec![];
let expected_cost = 0;
f.execute(&input[..], &mut BytesRef::Flexible(&mut output));
f.execute(&input[..], &mut BytesRef::Flexible(&mut output)).expect("Builtin should not fail");
assert_eq!(output.len(), 0); // shouldn't have written any output.
assert_eq!(f.cost(&input[..]), expected_cost.into());
}
}
#[test]
fn bn128_add() {
use rustc_serialize::hex::FromHex;
let f = Builtin {
pricer: Box::new(Linear { base: 0, word: 0 }),
native: ethereum_builtin("bn128_add"),
activate_at: 0,
};
// zero-points additions
{
let input = FromHex::from_hex("\
0000000000000000000000000000000000000000000000000000000000000000\
0000000000000000000000000000000000000000000000000000000000000000\
0000000000000000000000000000000000000000000000000000000000000000\
0000000000000000000000000000000000000000000000000000000000000000"
).unwrap();
let mut output = vec![0u8; 64];
let expected = FromHex::from_hex("\
0000000000000000000000000000000000000000000000000000000000000000\
0000000000000000000000000000000000000000000000000000000000000000"
).unwrap();
f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..])).expect("Builtin should not fail");
assert_eq!(output, expected);
}
// no input, should not fail
{
let mut empty = [0u8; 0];
let input = BytesRef::Fixed(&mut empty);
let mut output = vec![0u8; 64];
let expected = FromHex::from_hex("\
0000000000000000000000000000000000000000000000000000000000000000\
0000000000000000000000000000000000000000000000000000000000000000"
).unwrap();
f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..])).expect("Builtin should not fail");
assert_eq!(output, expected);
}
// should fail - point not on curve
{
let input = FromHex::from_hex("\
1111111111111111111111111111111111111111111111111111111111111111\
1111111111111111111111111111111111111111111111111111111111111111\
1111111111111111111111111111111111111111111111111111111111111111\
1111111111111111111111111111111111111111111111111111111111111111"
).unwrap();
let mut output = vec![0u8; 64];
let res = f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..]));
assert!(res.is_err(), "There should be built-in error here");
}
}
#[test]
fn bn128_mul() {
use rustc_serialize::hex::FromHex;
let f = Builtin {
pricer: Box::new(Linear { base: 0, word: 0 }),
native: ethereum_builtin("bn128_mul"),
activate_at: 0,
};
// zero-point multiplication
{
let input = FromHex::from_hex("\
0000000000000000000000000000000000000000000000000000000000000000\
0000000000000000000000000000000000000000000000000000000000000000\
0200000000000000000000000000000000000000000000000000000000000000"
).unwrap();
let mut output = vec![0u8; 64];
let expected = FromHex::from_hex("\
0000000000000000000000000000000000000000000000000000000000000000\
0000000000000000000000000000000000000000000000000000000000000000"
).unwrap();
f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..])).expect("Builtin should not fail");
assert_eq!(output, expected);
}
// should fail - point not on curve
{
let input = FromHex::from_hex("\
1111111111111111111111111111111111111111111111111111111111111111\
1111111111111111111111111111111111111111111111111111111111111111\
0f00000000000000000000000000000000000000000000000000000000000000"
).unwrap();
let mut output = vec![0u8; 64];
let res = f.execute(&input[..], &mut BytesRef::Fixed(&mut output[..]));
assert!(res.is_err(), "There should be built-in error here");
}
}
#[test]
#[should_panic]
fn from_unknown_linear() {
@ -549,7 +751,7 @@ mod tests {
let i = [0u8, 1, 2, 3];
let mut o = [255u8; 4];
b.execute(&i[..], &mut BytesRef::Fixed(&mut o[..]));
b.execute(&i[..], &mut BytesRef::Fixed(&mut o[..])).expect("Builtin should not fail");
assert_eq!(i, o);
}
@ -571,7 +773,7 @@ mod tests {
let i = [0u8, 1, 2, 3];
let mut o = [255u8; 4];
b.execute(&i[..], &mut BytesRef::Fixed(&mut o[..]));
b.execute(&i[..], &mut BytesRef::Fixed(&mut o[..])).expect("Builtin should not fail");
assert_eq!(i, o);
}
}

View File

@ -20,6 +20,7 @@ use std::{ops, cmp, fmt};
use util::{U128, U256, U512, Uint, trie};
use action_params::ActionParams;
use evm::Ext;
use builtin;
/// Evm errors.
#[derive(Debug, Clone, PartialEq)]
@ -59,6 +60,8 @@ pub enum Error {
/// What was the stack limit
limit: usize
},
/// Built-in contract failed on given input
BuiltIn(&'static str),
/// Returned on evm internal error. Should never be ignored during development.
/// Likely to cause consensus issues.
Internal(String),
@ -70,6 +73,12 @@ impl From<Box<trie::TrieError>> for Error {
}
}
impl From<builtin::Error> for Error {
fn from(err: builtin::Error) -> Self {
Error::BuiltIn(err.0)
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::Error::*;
@ -79,6 +88,7 @@ impl fmt::Display for Error {
BadInstruction { .. } => "Bad instruction",
StackUnderflow { .. } => "Stack underflow",
OutOfStack { .. } => "Out of stack",
BuiltIn { .. } => "Built-in failed",
Internal(ref msg) => msg,
};
message.fmt(f)

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@ -276,25 +276,31 @@ impl<'a, B: 'a + StateBackend> Executive<'a, B> {
let cost = builtin.cost(data);
if cost <= params.gas {
builtin.execute(data, &mut output);
self.state.discard_checkpoint();
if let Err(e) = builtin.execute(data, &mut output) {
self.state.revert_to_checkpoint();
let evm_err: evm::evm::Error = e.into();
tracer.trace_failed_call(trace_info, vec![], evm_err.clone().into());
Err(evm_err)
} else {
self.state.discard_checkpoint();
// trace only top level calls to builtins to avoid DDoS attacks
if self.depth == 0 {
let mut trace_output = tracer.prepare_trace_output();
if let Some(mut out) = trace_output.as_mut() {
*out = output.to_owned();
// trace only top level calls to builtins to avoid DDoS attacks
if self.depth == 0 {
let mut trace_output = tracer.prepare_trace_output();
if let Some(mut out) = trace_output.as_mut() {
*out = output.to_owned();
}
tracer.trace_call(
trace_info,
cost,
trace_output,
vec![]
);
}
tracer.trace_call(
trace_info,
cost,
trace_output,
vec![]
);
Ok(params.gas - cost)
}
Ok(params.gas - cost)
} else {
// just drain the whole gas
self.state.revert_to_checkpoint();
@ -497,6 +503,7 @@ impl<'a, B: 'a + StateBackend> Executive<'a, B> {
| Err(evm::Error::BadJumpDestination {..})
| Err(evm::Error::BadInstruction {.. })
| Err(evm::Error::StackUnderflow {..})
| Err(evm::Error::BuiltIn {..})
| Err(evm::Error::OutOfStack {..}) => {
self.state.revert_to_checkpoint();
},

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@ -108,6 +108,7 @@ extern crate hardware_wallet;
extern crate stats;
extern crate ethcore_logger;
extern crate num;
extern crate bn;
extern crate itertools;
#[macro_use]

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@ -35,6 +35,8 @@ pub enum Error {
StackUnderflow,
/// When execution would exceed defined Stack Limit
OutOfStack,
/// When builtin contract failed on input data
BuiltIn,
/// Returned on evm internal error. Should never be ignored during development.
/// Likely to cause consensus issues.
Internal,
@ -48,6 +50,7 @@ impl<'a> From<&'a EvmError> for Error {
EvmError::BadInstruction { .. } => Error::BadInstruction,
EvmError::StackUnderflow { .. } => Error::StackUnderflow,
EvmError::OutOfStack { .. } => Error::OutOfStack,
EvmError::BuiltIn { .. } => Error::BuiltIn,
EvmError::Internal(_) => Error::Internal,
}
}
@ -68,6 +71,7 @@ impl fmt::Display for Error {
BadInstruction => "Bad instruction",
StackUnderflow => "Stack underflow",
OutOfStack => "Out of stack",
BuiltIn => "Built-in failed",
Internal => "Internal error",
};
message.fmt(f)
@ -84,6 +88,7 @@ impl Encodable for Error {
StackUnderflow => 3,
OutOfStack => 4,
Internal => 5,
BuiltIn => 6,
};
s.append_internal(&value);
@ -101,6 +106,7 @@ impl Decodable for Error {
3 => Ok(StackUnderflow),
4 => Ok(OutOfStack),
5 => Ok(Internal),
6 => Ok(BuiltIn),
_ => Err(DecoderError::Custom("Invalid error type")),
}
}