Package com.gitlab.pdftk_java.com.lowagie.text.pdf

Class PdfEncryption

  • public class PdfEncryption
extends java.lang.Object

    • Field Detail

      • STANDARD_ENCRYPTION_128

        public static final int STANDARD_ENCRYPTION_128
        See Also:
        Constant Field Values

      • pad

        private static final byte[] pad

      • salt

        private static final byte[] salt

      • metadataPad

        private static final byte[] metadataPad

      • key

        byte[] key
        The encryption key for a particular object/generation

      • keySize

        int keySize
        The encryption key length for a particular object/generation

      • mkey

        byte[] mkey
        The global encryption key

      • extra

        byte[] extra
        Work area to prepare the object/generation bytes

      • md5

        java.security.MessageDigest md5
        The message digest algorithm MD5

      • ownerKey

        byte[] ownerKey
        The encryption key for the owner

      • userKey

        byte[] userKey
        The encryption key for the user

      • permissions

        int permissions
        The public key security handler for certificate encryption

      • documentID

        byte[] documentID

      • seq

        static long seq

      • revision

        private int revision

      • keyLength

        private int keyLength
        The generic key length. It may be 40 or 128.

      • encryptMetadata

        private boolean encryptMetadata

      • embeddedFilesOnly

        private boolean embeddedFilesOnly

      • cryptoMode

        private int cryptoMode

      • state

        byte[] state

      • x

        int x

      • y

        int y

    • Constructor Detail

      • PdfEncryption

        public PdfEncryption()

    • Method Detail

      • 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

      • padPassword

        private byte[] padPassword​(byte[] userPassword)

      • computeOwnerKey

        private byte[] computeOwnerKey​(byte[] userPad,
                               byte[] ownerPad)

      • setupGlobalEncryptionKey

        private void setupGlobalEncryptionKey​(byte[] documentID,
                                      byte[] userPad,
                                      byte[] ownerKey,
                                      int permissions)
        ownerKey, documentID must be setup

      • setupUserKey

        private void setupUserKey()
        mkey must be setup

      • setupAllKeys

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

      • createDocumentId

        public static byte[] createDocumentId()

      • setupByUserPassword

        public void setupByUserPassword​(byte[] documentID,
                                byte[] userPassword,
                                byte[] ownerKey,
                                int permissions)

      • setupByUserPad

        private void setupByUserPad​(byte[] documentID,
                            byte[] userPad,
                            byte[] ownerKey,
                            int permissions)

      • setupByOwnerPassword

        public void setupByOwnerPassword​(byte[] documentID,
                                 byte[] ownerPassword,
                                 byte[] userKey,
                                 byte[] ownerKey,
                                 int permissions)

      • setupByOwnerPad

        private void setupByOwnerPad​(byte[] documentID,
                             byte[] ownerPad,
                             byte[] userKey,
                             byte[] ownerKey,
                             int permissions)

      • setupByEncryptionKey

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

      • setHashKey

        public void setHashKey​(int number,
                       int generation)

      • createInfoId

        public static PdfObject createInfoId​(byte[] id)

      • getEncryptionDictionary

        public PdfDictionary getEncryptionDictionary()

      • calculateStreamSize

        public int calculateStreamSize​(int n)

      • encryptByteArray

        public byte[] encryptByteArray​(byte[] b)

      • decryptByteArray

        public byte[] decryptByteArray​(byte[] b)

      • computeUserPassword

        public byte[] computeUserPassword​(byte[] ownerPassword)

      • prepareKey

        public void prepareKey()

      • prepareRC4Key

        public void prepareRC4Key​(byte[] kk)

      • prepareRC4Key

        public void prepareRC4Key​(byte[] kk,
                          int off,
                          int len)

      • encryptRC4

        public void encryptRC4​(byte[] dataIn,
                       int off,
                       int len,
                       byte[] dataOut)

      • encryptRC4

        public void encryptRC4​(byte[] data,
                       int off,
                       int len)

      • encryptRC4

        public void encryptRC4​(byte[] dataIn,
                       byte[] dataOut)

      • encryptRC4

        public void encryptRC4​(byte[] data)