Module com.github.librepdf.openpdf
Package com.lowagie.text.pdf

Class PdfEncryption

java.lang.Object
com.lowagie.text.pdf.PdfEncryption
public class PdfEncryption extends Object
Author:
Paulo Soares (psoares@consiste.pt), Kazuya Ujihara

  • Field Details

  • Constructor Details

    • PdfEncryption

      public PdfEncryption()

    • PdfEncryption

      public PdfEncryption(PdfEncryption enc)

  • Method Details

    • createDocumentId

      public static byte[] createDocumentId()

    • createInfoId

      public static PdfObject createInfoId(byte[] id)

    • createInfoId

      public static PdfObject createInfoId(byte[] idPartOne, byte[] idPartTwo)

    • getFileIdChangingPart

      public static byte[] getFileIdChangingPart(PdfObject fileId)
      This method returns a changing part of the fileId when can be identified. Returns a complete fileId of the changing part is not found.
      Parameters:
      fileId - PdfObject
      Returns:
      byte array representing the changing part of the document identifier

    • setCryptoMode

      public void setCryptoMode(int mode, int kl)

    • getCryptoMode

      public int getCryptoMode()

    • isMetadataEncrypted

      public boolean isMetadataEncrypted()

    • isEmbeddedFilesOnly

      public boolean isEmbeddedFilesOnly()
      Indicates if only the embedded files have to be encrypted.
      Returns:
      if true only the embedded files will be encrypted
      Since:
      2.1.3

    • setupAllKeys

      public void setupAllKeys(byte[] userPassword, byte[] ownerPassword, int permissions)

    • setupByUserPassword

      public void setupByUserPassword(byte[] documentID, byte[] userPassword, byte[] ownerKey, int permissions)
      Parameters:
      documentID - byte array of document id
      userPassword - byte array of user password
      ownerKey - byte array of owner key
      permissions - permissions

    • setupByOwnerPassword

      public void setupByOwnerPassword(byte[] documentID, byte[] ownerPassword, byte[] userKey, byte[] ownerKey, int permissions)
      Parameters:
      documentID - byte array of document id
      ownerPassword - byte array of owner password
      userKey - byte array of user key
      ownerKey - byte array of owner key
      permissions - permissions

    • setupByEncryptionKey

      public void setupByEncryptionKey(byte[] key, int keylength)

    • setHashKey

      public void setHashKey(int number, int generation)

    • getEncryptionDictionary

      public PdfDictionary getEncryptionDictionary()

    • getFileID

      public PdfObject getFileID()

    • getEncryptionStream

      public OutputStreamEncryption getEncryptionStream(OutputStream os)

    • calculateStreamSize

      public int calculateStreamSize(int n)

    • encryptByteArray

      public byte[] encryptByteArray(byte[] b)

    • getDecryptor

      public StandardDecryption getDecryptor()

    • decryptByteArray

      public byte[] decryptByteArray(byte[] b)

    • addRecipient

      public void addRecipient(Certificate cert, int permission)

    • computeUserPassword

      public byte[] computeUserPassword(byte[] ownerPassword)

    • setupByOwnerPassword

      public void setupByOwnerPassword(byte[] documentID, byte[] ownerPassword, byte[] uValue, byte[] ueValue, byte[] oValue, byte[] oeValue, int permissions) throws GeneralSecurityException
      implements step d of Algorithm 2.A: Retrieving the file encryption key from an encrypted document in order to decrypt it (revision 6 and later) - ISO 32000-2 section 7.6.4.3.3
      Throws:
      GeneralSecurityException

    • setupByUserPassword

      public void setupByUserPassword(byte[] documentID, byte[] userPassword, byte[] uValue, byte[] ueValue, byte[] oValue, byte[] oeValue, int permissions) throws GeneralSecurityException
      implements step e of Algorithm 2.A: Retrieving the file encryption key from an encrypted document in order to decrypt it (revision 6 and later) - ISO 32000-2 section 7.6.4.3.3
      Throws:
      GeneralSecurityException

    • decryptAndCheckPerms

      public boolean decryptAndCheckPerms(byte[] permsValue) throws GeneralSecurityException
      implements step f of Algorithm 2.A: Retrieving the file encryption key from an encrypted document in order to decrypt it (revision 6 and later) - ISO 32000-2 section 7.6.4.3.3
      Throws:
      GeneralSecurityException