You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.0 KiB
88 lines
2.0 KiB
package merkle
|
|
|
|
import (
|
|
"bytes"
|
|
|
|
cmn "github.com/tendermint/tmlibs/common"
|
|
. "github.com/tendermint/tmlibs/test"
|
|
|
|
"github.com/tendermint/tendermint/crypto/tmhash"
|
|
"testing"
|
|
)
|
|
|
|
type testItem []byte
|
|
|
|
func (tI testItem) Hash() []byte {
|
|
return []byte(tI)
|
|
}
|
|
|
|
func TestSimpleProof(t *testing.T) {
|
|
|
|
total := 100
|
|
|
|
items := make([]Hasher, total)
|
|
for i := 0; i < total; i++ {
|
|
items[i] = testItem(cmn.RandBytes(tmhash.Size))
|
|
}
|
|
|
|
rootHash := SimpleHashFromHashers(items)
|
|
|
|
rootHash2, proofs := SimpleProofsFromHashers(items)
|
|
|
|
if !bytes.Equal(rootHash, rootHash2) {
|
|
t.Errorf("Unmatched root hashes: %X vs %X", rootHash, rootHash2)
|
|
}
|
|
|
|
// For each item, check the trail.
|
|
for i, item := range items {
|
|
itemHash := item.Hash()
|
|
proof := proofs[i]
|
|
|
|
// Verify success
|
|
ok := proof.Verify(i, total, itemHash, rootHash)
|
|
if !ok {
|
|
t.Errorf("Verification failed for index %v.", i)
|
|
}
|
|
|
|
// Wrong item index should make it fail
|
|
{
|
|
ok = proof.Verify((i+1)%total, total, itemHash, rootHash)
|
|
if ok {
|
|
t.Errorf("Expected verification to fail for wrong index %v.", i)
|
|
}
|
|
}
|
|
|
|
// Trail too long should make it fail
|
|
origAunts := proof.Aunts
|
|
proof.Aunts = append(proof.Aunts, cmn.RandBytes(32))
|
|
{
|
|
ok = proof.Verify(i, total, itemHash, rootHash)
|
|
if ok {
|
|
t.Errorf("Expected verification to fail for wrong trail length.")
|
|
}
|
|
}
|
|
proof.Aunts = origAunts
|
|
|
|
// Trail too short should make it fail
|
|
proof.Aunts = proof.Aunts[0 : len(proof.Aunts)-1]
|
|
{
|
|
ok = proof.Verify(i, total, itemHash, rootHash)
|
|
if ok {
|
|
t.Errorf("Expected verification to fail for wrong trail length.")
|
|
}
|
|
}
|
|
proof.Aunts = origAunts
|
|
|
|
// Mutating the itemHash should make it fail.
|
|
ok = proof.Verify(i, total, MutateByteSlice(itemHash), rootHash)
|
|
if ok {
|
|
t.Errorf("Expected verification to fail for mutated leaf hash")
|
|
}
|
|
|
|
// Mutating the rootHash should make it fail.
|
|
ok = proof.Verify(i, total, itemHash, MutateByteSlice(rootHash))
|
|
if ok {
|
|
t.Errorf("Expected verification to fail for mutated root hash")
|
|
}
|
|
}
|
|
}
|