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Use UntrustedRlp for block verification (#1872)

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This commit is contained in:
Arkadiy Paronyan 2016-08-08 16:56:35 +02:00 committed by Gav Wood
parent 35451e31d4
commit 6762447229
1 changed files with 10 additions and 8 deletions
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18
ethcore/src/verification/verification.rs
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@ -40,7 +40,8 @@ pub fn verify_block_basic(header: &Header, bytes: &[u8], engine: &Engine) -> Res
try!(verify_header(&header, engine)); try!(verify_header(&header, engine));
try!(verify_block_integrity(bytes, &header.transactions_root, &header.uncles_hash)); try!(verify_block_integrity(bytes, &header.transactions_root, &header.uncles_hash));
try!(engine.verify_block_basic(&header, Some(bytes))); try!(engine.verify_block_basic(&header, Some(bytes)));
for u in Rlp::new(bytes).at(2).iter().map(|rlp| rlp.as_val::<Header>()) { for u in try!(UntrustedRlp::new(bytes).at(2)).iter().map(|rlp| rlp.as_val::<Header>()) {
let u = try!(u);
try!(verify_header(&u, engine)); try!(verify_header(&u, engine));
try!(engine.verify_block_basic(&u, None)); try!(engine.verify_block_basic(&u, None));
} }
@ -58,8 +59,8 @@ pub fn verify_block_basic(header: &Header, bytes: &[u8], engine: &Engine) -> Res
/// Returns a `PreverifiedBlock` structure populated with transactions /// Returns a `PreverifiedBlock` structure populated with transactions
pub fn verify_block_unordered(header: Header, bytes: Bytes, engine: &Engine) -> Result<PreverifiedBlock, Error> { pub fn verify_block_unordered(header: Header, bytes: Bytes, engine: &Engine) -> Result<PreverifiedBlock, Error> {
try!(engine.verify_block_unordered(&header, Some(&bytes))); try!(engine.verify_block_unordered(&header, Some(&bytes)));
for u in Rlp::new(&bytes).at(2).iter().map(|rlp| rlp.as_val::<Header>()) { for u in try!(UntrustedRlp::new(&bytes).at(2)).iter().map(|rlp| rlp.as_val::<Header>()) {
try!(engine.verify_block_unordered(&u, None)); try!(engine.verify_block_unordered(&try!(u), None));
} }
// Verify transactions. // Verify transactions.
let mut transactions = Vec::new(); let mut transactions = Vec::new();
@ -84,7 +85,7 @@ pub fn verify_block_family(header: &Header, bytes: &[u8], engine: &Engine, bc: &
try!(verify_parent(&header, &parent)); try!(verify_parent(&header, &parent));
try!(engine.verify_block_family(&header, &parent, Some(bytes))); try!(engine.verify_block_family(&header, &parent, Some(bytes)));
let num_uncles = Rlp::new(bytes).at(2).item_count(); let num_uncles = try!(UntrustedRlp::new(bytes).at(2)).item_count();
if num_uncles != 0 { if num_uncles != 0 {
if num_uncles > engine.maximum_uncle_count() { if num_uncles > engine.maximum_uncle_count() {
return Err(From::from(BlockError::TooManyUncles(OutOfBounds { min: None, max: Some(engine.maximum_uncle_count()), found: num_uncles }))); return Err(From::from(BlockError::TooManyUncles(OutOfBounds { min: None, max: Some(engine.maximum_uncle_count()), found: num_uncles })));
@ -106,7 +107,8 @@ pub fn verify_block_family(header: &Header, bytes: &[u8], engine: &Engine, bc: &
} }
} }
for uncle in Rlp::new(bytes).at(2).iter().map(|rlp| rlp.as_val::<Header>()) { for uncle in try!(UntrustedRlp::new(bytes).at(2)).iter().map(|rlp| rlp.as_val::<Header>()) {
let uncle = try!(uncle);
if excluded.contains(&uncle.hash()) { if excluded.contains(&uncle.hash()) {
return Err(From::from(BlockError::UncleInChain(uncle.hash()))) return Err(From::from(BlockError::UncleInChain(uncle.hash())))
} }
@ -210,13 +212,13 @@ fn verify_parent(header: &Header, parent: &Header) -> Result<(), Error> {
/// Verify block data against header: transactions root and uncles hash. /// Verify block data against header: transactions root and uncles hash.
fn verify_block_integrity(block: &[u8], transactions_root: &H256, uncles_hash: &H256) -> Result<(), Error> { fn verify_block_integrity(block: &[u8], transactions_root: &H256, uncles_hash: &H256) -> Result<(), Error> {
let block = Rlp::new(block); let block = UntrustedRlp::new(block);
let tx = block.at(1); let tx = try!(block.at(1));
let expected_root = &ordered_trie_root(tx.iter().map(|r| r.as_raw().to_vec()).collect()); //TODO: get rid of vectors here let expected_root = &ordered_trie_root(tx.iter().map(|r| r.as_raw().to_vec()).collect()); //TODO: get rid of vectors here
if expected_root != transactions_root { if expected_root != transactions_root {
return Err(From::from(BlockError::InvalidTransactionsRoot(Mismatch { expected: expected_root.clone(), found: transactions_root.clone() }))) return Err(From::from(BlockError::InvalidTransactionsRoot(Mismatch { expected: expected_root.clone(), found: transactions_root.clone() })))
} }
let expected_uncles = &block.at(2).as_raw().sha3(); let expected_uncles = &try!(block.at(2)).as_raw().sha3();
if expected_uncles != uncles_hash { if expected_uncles != uncles_hash {
return Err(From::from(BlockError::InvalidUnclesHash(Mismatch { expected: expected_uncles.clone(), found: uncles_hash.clone() }))) return Err(From::from(BlockError::InvalidUnclesHash(Mismatch { expected: expected_uncles.clone(), found: uncles_hash.clone() })))
} }