Java Doc for PDFEncryption.java in  » PDF » PDFBox-0.7.3 » org » pdfbox » encryption » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » PDF » PDFBox 0.7.3 » org.pdfbox.encryption   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.pdfbox.encryption.PDFEncryption PDFEncryption final public class PDFEncryption (Code) This class will deal with PDF encryption algorithms. author:    Ben Litchfield version:    $Revision: 1.15 $ See Also:   org.pdfbox.pdmodel.encryption.StandardSecurityHandler Field Summary final public static  byte[] ENCRYPT_PADDING      The encryption padding defined in the PDF 1.4 Spec algorithm 3.2. Method Summary final public  byte[] computeEncryptedKey(byte[] password, byte[] o, int permissions, byte[] id, int revision, int length)      This will compute the encrypted key. Parameters:   password - The password used to compute the encrypted key. Parameters:   o - The owner password hash. Parameters:   permissions - The permissions for the document. Parameters:   id - The document id. Parameters:   revision - The security revision. Parameters:   length - The length of the encryption key. final public  byte[] computeOwnerPassword(byte[] ownerPassword, byte[] userPassword, int revision, int length)      This algorithm is taked from PDF Reference 1.4 Algorithm 3.3 Page 79. Parameters:   ownerPassword - The plain owner password. Parameters:   userPassword - The plain user password. Parameters:   revision - The version of the security. Parameters:   length - The length of the document. final public  byte[] computeUserPassword(byte[] password, byte[] o, int permissions, byte[] id, int revision, int length)      This will compute the user password hash. Parameters:   password - The plain text password. Parameters:   o - The owner password hash. Parameters:   permissions - The document permissions. Parameters:   id - The document id. Parameters:   revision - The revision of the encryption. Parameters:   length - The length of the encryption key. final public  void encryptData(long objectNumber, long genNumber, byte[] key, InputStream data, OutputStream output)      This will encrypt a piece of data. final public  byte[] getUserPassword(byte[] ownerPassword, byte[] o, int revision, long length)      This will get the user password from the owner password and the documents o value. Parameters:   ownerPassword - The plaintext owner password. Parameters:   o - The document's o entry. Parameters:   revision - The document revision number. Parameters:   length - The length of the encryption. final public  boolean isOwnerPassword(byte[] ownerPassword, byte[] u, byte[] o, int permissions, byte[] id, int revision, int length)      This will tell if this is the owner password or not. Parameters:   ownerPassword - The plaintext owner password. Parameters:   u - The U value from the PDF Document. Parameters:   o - The owner password hash. Parameters:   permissions - The document permissions. Parameters:   id - The document id. Parameters:   revision - The revision of the encryption. Parameters:   length - The length of the encryption key. final public  boolean isUserPassword(byte[] password, byte[] u, byte[] o, int permissions, byte[] id, int revision, int length)      This will tell if this is a valid user password. Algorithm 3.6 pg 80 Parameters:   password - The password to test. Parameters:   u - The U value from the PDF Document. Parameters:   o - The owner password hash. Parameters:   permissions - The document permissions. Parameters:   id - The document id. Parameters:   revision - The revision of the encryption. Parameters:   length - The length of the encryption key. Field Detail ENCRYPT_PADDING final public static byte[] ENCRYPT_PADDING(Code) The encryption padding defined in the PDF 1.4 Spec algorithm 3.2. Method Detail computeEncryptedKey final public byte[] computeEncryptedKey(byte[] password, byte[] o, int permissions, byte[] id, int revision, int length) throws CryptographyException(Code) This will compute the encrypted key. Parameters:   password - The password used to compute the encrypted key. Parameters:   o - The owner password hash. Parameters:   permissions - The permissions for the document. Parameters:   id - The document id. Parameters:   revision - The security revision. Parameters:   length - The length of the encryption key. The encryption key. throws:   CryptographyException - If there is an error computing the key. computeOwnerPassword final public byte[] computeOwnerPassword(byte[] ownerPassword, byte[] userPassword, int revision, int length) throws CryptographyException, IOException(Code) This algorithm is taked from PDF Reference 1.4 Algorithm 3.3 Page 79. Parameters:   ownerPassword - The plain owner password. Parameters:   userPassword - The plain user password. Parameters:   revision - The version of the security. Parameters:   length - The length of the document. The computed owner password. throws:   CryptographyException - If there is an error computing O. throws:   IOException - If there is an error computing O. computeUserPassword final public byte[] computeUserPassword(byte[] password, byte[] o, int permissions, byte[] id, int revision, int length) throws CryptographyException, IOException(Code) This will compute the user password hash. Parameters:   password - The plain text password. Parameters:   o - The owner password hash. Parameters:   permissions - The document permissions. Parameters:   id - The document id. Parameters:   revision - The revision of the encryption. Parameters:   length - The length of the encryption key. The user password. throws:   CryptographyException - If there is an error computing the user password. throws:   IOException - If there is an IO error. encryptData final public void encryptData(long objectNumber, long genNumber, byte[] key, InputStream data, OutputStream output) throws CryptographyException, IOException(Code) This will encrypt a piece of data. Parameters:   objectNumber - The id for the object. Parameters:   genNumber - The generation id for the object. Parameters:   key - The key used to encrypt the data. Parameters:   data - The data to encrypt/decrypt. Parameters:   output - The stream to write to. throws:   CryptographyException - If there is an error encrypting the data. throws:   IOException - If there is an io error. getUserPassword final public byte[] getUserPassword(byte[] ownerPassword, byte[] o, int revision, long length) throws CryptographyException, IOException(Code) This will get the user password from the owner password and the documents o value. Parameters:   ownerPassword - The plaintext owner password. Parameters:   o - The document's o entry. Parameters:   revision - The document revision number. Parameters:   length - The length of the encryption. The plaintext padded user password. throws:   CryptographyException - If there is an error getting the user password. throws:   IOException - If there is an error reading data. isOwnerPassword final public boolean isOwnerPassword(byte[] ownerPassword, byte[] u, byte[] o, int permissions, byte[] id, int revision, int length) throws CryptographyException, IOException(Code) This will tell if this is the owner password or not. Parameters:   ownerPassword - The plaintext owner password. Parameters:   u - The U value from the PDF Document. Parameters:   o - The owner password hash. Parameters:   permissions - The document permissions. Parameters:   id - The document id. Parameters:   revision - The revision of the encryption. Parameters:   length - The length of the encryption key. true if the owner password matches the one from the document. throws:   CryptographyException - If there is an error while executing crypt functions. throws:   IOException - If there is an error while checking owner password. isUserPassword final public boolean isUserPassword(byte[] password, byte[] u, byte[] o, int permissions, byte[] id, int revision, int length) throws CryptographyException, IOException(Code) This will tell if this is a valid user password. Algorithm 3.6 pg 80 Parameters:   password - The password to test. Parameters:   u - The U value from the PDF Document. Parameters:   o - The owner password hash. Parameters:   permissions - The document permissions. Parameters:   id - The document id. Parameters:   revision - The revision of the encryption. Parameters:   length - The length of the encryption key. true If this is the correct user password. throws:   CryptographyException - If there is an error computing the value. throws:   IOException - If there is an IO error while computing the owners password. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)