diff options
Diffstat (limited to 'pkg/merkletree/merkletree.go')
| -rw-r--r-- | pkg/merkletree/merkletree.go | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/pkg/merkletree/merkletree.go b/pkg/merkletree/merkletree.go index 6acee90ef..aea7dde38 100644 --- a/pkg/merkletree/merkletree.go +++ b/pkg/merkletree/merkletree.go @@ -350,9 +350,13 @@ type VerifyParams struct { // For verifyMetadata, params.data is not needed. It only accesses params.tree // for the raw root hash. func verifyMetadata(params *VerifyParams, layout *Layout) error { - root := make([]byte, layout.digestSize) - if _, err := params.Tree.ReadAt(root, layout.blockOffset(layout.rootLevel(), 0 /* index */)); err != nil { - return fmt.Errorf("failed to read root hash: %w", err) + var root []byte + // Only read the root hash if we expect that the Merkle tree file is non-empty. + if params.Size != 0 { + root = make([]byte, layout.digestSize) + if _, err := params.Tree.ReadAt(root, layout.blockOffset(layout.rootLevel(), 0 /* index */)); err != nil { + return fmt.Errorf("failed to read root hash: %w", err) + } } descriptor := VerityDescriptor{ Name: params.Name, |