Package org.verapdf.pd.encryption

Class PDEncryption

  • public class PDEncryption
extends PDObject
    Represents encryption dictionary on PD level.
    Author:
    Sergey Shemyakov

    • Constructor Detail

      • PDEncryption

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

      • PDEncryption

        public PDEncryption()

    • Method Detail

      • 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.

      • 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.