How to open an encrypted locked PDF

Encrypted PDF documents can be easily decrypted by UniPDF by following this step below:

• Check if the document is encrypted

pdfReader, _ := model.NewPdfReader(f)
isEncrypted, _ := pdfReader.IsEncrypted()

• If the document is encrypted, call Decrypt to decrypt it using a password

if isEncrypted {
 documentPassword := "unlockthedoc"

 auth, err := pdfReader.Decrypt([]byte(documentPassword))

 if !auth {
 return errors.New("Decryption failed")
 }
}

• If there’s no error, then the document is successfully decrypted and you can continue processing the document.

For a complete example on how to unlock an encrypted PDF document, see our user guide.