format/pack/ingest: Improve trailer stuff

1 files changed, 0 insertions, 65 deletions

diff --git a/format/pack/ingest/trailer.go b/format/pack/ingest/trailer.go
deleted file mode 100644
index be8156d3..00000000
--- a/format/pack/ingest/trailer.go
+++ /dev/null
@@ -1,65 +0,0 @@
-package ingest
-
-import (
-	"bytes"
-	"fmt"
-	"hash"
-)
-
-// trailerVerifier incrementally verifies trailing hash bytes in a stream.
-type trailerVerifier struct {
-	hash     hash.Hash
-	hashSize int
-	tail     []byte
-	seen     int64
-}
-
-// newTrailerVerifier creates a trailing hash verifier.
-func newTrailerVerifier(hash hash.Hash, hashSize int) *trailerVerifier {
-	return &trailerVerifier{
-		hash:     hash,
-		hashSize: hashSize,
-		tail:     make([]byte, 0, hashSize),
-	}
-}
-
-// write feeds one chunk of stream bytes into the verifier.
-func (verifier *trailerVerifier) write(src []byte) {
-	if len(src) == 0 {
-		return
-	}
-
-	verifier.seen += int64(len(src))
-	if len(verifier.tail) == 0 && len(src) <= verifier.hashSize {
-		verifier.tail = append(verifier.tail, src...)
-
-		return
-	}
-
-	tmp := make([]byte, 0, len(verifier.tail)+len(src))
-	tmp = append(tmp, verifier.tail...)
-	tmp = append(tmp, src...)
-	if len(tmp) <= verifier.hashSize {
-		verifier.tail = tmp
-
-		return
-	}
-
-	flushN := len(tmp) - verifier.hashSize
-	_, _ = verifier.hash.Write(tmp[:flushN])
-	verifier.tail = append(verifier.tail[:0], tmp[flushN:]...)
-}
-
-// verify finalizes verification against the stream trailer.
-func (verifier *trailerVerifier) verify() error {
-	if len(verifier.tail) != verifier.hashSize {
-		return fmt.Errorf("format/pack/ingest: stream too short for trailer hash")
-	}
-
-	computed := verifier.hash.Sum(nil)
-	if !bytes.Equal(computed, verifier.tail) {
-		return &ErrPackTrailerMismatch{}
-	}
-
-	return nil
-}