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SHA3 in interpreter

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This commit is contained in:
wborgeaud 2022-07-18 16:24:47 +02:00
parent ae7103d560
commit 14a58439e5
1 changed files with 18 additions and 2 deletions
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20
evm/src/cpu/kernel/interpreter.rs
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@ -1,4 +1,5 @@
use ethereum_types::{U256, U512};
use ethereum_types::{BigEndianHash, U256, U512};
use keccak_hash::keccak;
/// Halt interpreter execution whenever a jump to this offset is done.
const HALT_OFFSET: usize = 0xdeadbeef;
@ -25,6 +26,11 @@ impl EvmMemory {
U256::from_big_endian(&self.memory[offset..offset + 32])
}
fn mload8(&mut self, offset: usize) -> u8 {
self.expand(offset + 1);
self.memory[offset]
}
fn mstore(&mut self, offset: usize, value: U256) {
self.expand(offset + 32);
let value_be = {
@ -119,7 +125,7 @@ impl<'a> Interpreter<'a> {
0x1b => todo!(), // "SHL",
0x1c => todo!(), // "SHR",
0x1d => todo!(), // "SAR",
0x20 => todo!(), // "KECCAK256",
0x20 => self.run_sha3(), // "SHA3",
0x30 => todo!(), // "ADDRESS",
0x31 => todo!(), // "BALANCE",
0x32 => todo!(), // "ORIGIN",
@ -286,6 +292,16 @@ impl<'a> Interpreter<'a> {
self.push(!x);
}
fn run_sha3(&mut self) {
let offset = self.pop().as_usize();
let size = self.pop().as_usize();
let bytes = (offset..offset + size)
.map(|i| self.memory.mload8(i))
.collect::<Vec<_>>();
let hash = keccak(bytes);
self.push(hash.into_uint());
}
fn run_pop(&mut self) {
self.pop();
}