| 41 | } |
| 42 | |
| 43 | func (d *digestingReader) Read(p []byte) (int, error) { |
| 44 | n, err := d.source.Read(p) |
| 45 | if n > 0 { |
| 46 | if n2, err := d.hash.Write(p[:n]); n2 != n || err != nil { |
| 47 | // Coverage: This should not happen, the hash.Hash interface requires |
| 48 | // d.digest.Write to never return an error, and the io.Writer interface |
| 49 | // requires n2 == len(input) if no error is returned. |
| 50 | return 0, fmt.Errorf("updating digest during verification: %d vs. %d: %w", n2, n, err) |
| 51 | } |
| 52 | } |
| 53 | if err == io.EOF { |
| 54 | actualDigest := d.digester.Digest() |
| 55 | if actualDigest != d.expectedDigest { |
| 56 | d.validationFailed = true |
| 57 | return 0, fmt.Errorf("Digest did not match, expected %s, got %s", d.expectedDigest, actualDigest) |
| 58 | } |
| 59 | d.validationSucceeded = true |
| 60 | } |
| 61 | return n, err |
| 62 | } |