diff options
Diffstat (limited to 'pdf/pdf.go')
| -rw-r--r-- | pdf/pdf.go | 8 |
1 files changed, 5 insertions, 3 deletions
@@ -1115,12 +1115,14 @@ func FillInSignature(document []byte, signOff, signLen int, // There must be at least one certificate, matching the private key. // The certificates must form a chain. // +// A good default for the reservation is around 4096 (the value is in bytes). +// // The presumption here is that the document is valid and that it doesn't // employ cross-reference streams from PDF 1.5, or at least constitutes // a hybrid-reference file. The results with PDF 2.0 (2017) are currently // unknown as the standard costs money. -func Sign(document []byte, - key crypto.PrivateKey, certs []*x509.Certificate) ([]byte, error) { +func Sign(document []byte, key crypto.PrivateKey, certs []*x509.Certificate, + reservation int) ([]byte, error) { pdf, err := NewUpdater(document) if err != nil { return nil, err @@ -1152,7 +1154,7 @@ func Sign(document []byte, buf.WriteString("\n /Contents <") signOff = buf.Len() - signLen = 8192 // cert, digest, encrypted digest, ... + signLen = reservation * 2 // cert, digest, encrypted digest, ... buf.Write(bytes.Repeat([]byte{'0'}, signLen)) buf.WriteString("> >>") |