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Simple merkle rfc compatibility (#2713)

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* Begin simple merkle compatibility PR

* Fix query_test

* Use trillian test vectors

* Change the split point per RFC 6962

* update spec

* refactor innerhash to match spec

* Update changelog

* Address @liamsi's comments

* Write the comment requested by @liamsi
This commit is contained in:
Dev Ojha
2019-01-13 17:02:38 -06:00
committed by Ethan Buchman
parent 1f68318875
commit ec53ce359b
15 changed files with 233 additions and 112 deletions
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36
crypto/merkle/simple_tree_test.go
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@ -34,7 +34,6 @@ func TestSimpleProof(t *testing.T) {
// For each item, check the trail.
for i, item := range items {
itemHash := tmhash.Sum(item)
proof := proofs[i]
// Check total/index
@ -43,30 +42,53 @@ func TestSimpleProof(t *testing.T) {
require.Equal(t, proof.Total, total, "Unmatched totals: %d vs %d", proof.Total, total)
// Verify success
err := proof.Verify(rootHash, itemHash)
require.NoError(t, err, "Verificatior failed: %v.", err)
err := proof.Verify(rootHash, item)
require.NoError(t, err, "Verification failed: %v.", err)
// Trail too long should make it fail
origAunts := proof.Aunts
proof.Aunts = append(proof.Aunts, cmn.RandBytes(32))
err = proof.Verify(rootHash, itemHash)
err = proof.Verify(rootHash, item)
require.Error(t, err, "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]
err = proof.Verify(rootHash, itemHash)
err = proof.Verify(rootHash, item)
require.Error(t, err, "Expected verification to fail for wrong trail length")
proof.Aunts = origAunts
// Mutating the itemHash should make it fail.
err = proof.Verify(rootHash, MutateByteSlice(itemHash))
err = proof.Verify(rootHash, MutateByteSlice(item))
require.Error(t, err, "Expected verification to fail for mutated leaf hash")
// Mutating the rootHash should make it fail.
err = proof.Verify(MutateByteSlice(rootHash), itemHash)
err = proof.Verify(MutateByteSlice(rootHash), item)
require.Error(t, err, "Expected verification to fail for mutated root hash")
}
}
func Test_getSplitPoint(t *testing.T) {
tests := []struct {
length int
want int
}{
{1, 0},
{2, 1},
{3, 2},
{4, 2},
{5, 4},
{10, 8},
{20, 16},
{100, 64},
{255, 128},
{256, 128},
{257, 256},
}
for _, tt := range tests {
got := getSplitPoint(tt.length)
require.Equal(t, tt.want, got, "getSplitPoint(%d) = %v, want %v", tt.length, got, tt.want)
}
}