Package org.verapdf.pd.encryption

Class PDEncryption

java.lang.Object
org.verapdf.pd.PDObject
org.verapdf.pd.encryption.PDEncryption
public class PDEncryption extends PDObject
Represents encryption dictionary on PD level.
Author:
Sergey Shemyakov

  • Constructor Details

    • PDEncryption

      public PDEncryption(COSObject obj)
      Constructor from encryption dictionary.
      Parameters:
      obj - is encryption dictionary.

    • PDEncryption

      public PDEncryption()

  • Method Details

    • getFilter

      public ASAtom getFilter()
      Returns:
      the name of the preferred security handler for this document.

    • getSubFilter

      public ASAtom getSubFilter()
      Returns:
      a name that completely specifies the format and interpretation of the contents of the encryption dictionary.

    • getUserPermissions

      public AccessPermissions getUserPermissions()

    • getV

      public int getV()
      Returns:
      a code specifying the algorithm to be used in encrypting and decrypting the document.

    • getLength

      public int getLength()
      Returns:
      the length of the encryption key, in bits.

    • getR

      public Long getR()
      Returns:
      a number specifying revision of the standard security handler.

    • getO

      public COSString getO()
      Returns:
      O string from encryption dictionary.

    • getU

      public COSString getU()
      Returns:
      U string from encryption dictionary.

    • getP

      public Long getP()
      Returns:
      integer that is a set of flags specifying which operations can be performed when document is opened with user access.

    • getOE

      public COSString getOE()
      Returns:
      value of OE key, as described in PDF-2.0 specification.

    • getUE

      public COSString getUE()
      Returns:
      value of UE key, as described in PDF-2.0 specification.

    • isEncryptMetadata

      public boolean isEncryptMetadata()
      Returns:
      true if document-level metadata stream shall be be encrypted.

    • getStandardCryptFilter

      public PDCryptFilter getStandardCryptFilter()
      Returns:
      standard crypt filter for standard security handler of revision 4.

    • getCryptFilter

      public PDCryptFilter getCryptFilter(ASAtom cfName)
      Gets crypt filter with given name.
      Parameters:
      cfName - is name for crypt filter.
      Returns:
      crypt filter for this name taken from encryption dictionary CF dict.