#include <PdfEncrypt.h>

Inheritance diagram for PoDoFo::PdfEncryptAESV2:

Public Member Functions
virtual PdfInputStream *	CreateEncryptionInputStream (PdfInputStream *pInputStream)

virtual PdfOutputStream *	CreateEncryptionOutputStream (PdfOutputStream *pOutputStream)

virtual bool	Authenticate (const std::string &password, const PdfString &documentId)

virtual void	Encrypt (const unsigned char inStr, pdf_long inLen, unsigned char outStr, pdf_long outLen) const
	Encrypt a character string.

virtual void	Decrypt (const unsigned char inStr, pdf_long inLen, unsigned char outStr, pdf_long outLen) const
	Decrypt a character string.

virtual void	GenerateEncryptionKey (const PdfString &documentId)

virtual pdf_long	CalculateStreamOffset () const
	Calculate stream offset.

virtual pdf_long	CalculateStreamLength (pdf_long length) const
	Calculate stream size.

Public Member Functions inherited from PoDoFo::PdfEncryptMD5Base
virtual void	Encrypt (const unsigned char inStr, pdf_long inLen, unsigned char outStr, pdf_long outLen) const =0
	Encrypt a character string.

Public Member Functions inherited from PoDoFo::PdfEncrypt
virtual	~PdfEncrypt ()=0

virtual void	CreateEncryptionDictionary (PdfDictionary &rDictionary) const =0

EPdfEncryptAlgorithm	GetEncryptAlgorithm () const

bool	IsPrintAllowed () const

bool	IsEditAllowed () const

bool	IsCopyAllowed () const

bool	IsEditNotesAllowed () const

bool	IsFillAndSignAllowed () const

bool	IsAccessibilityAllowed () const

bool	IsDocAssemblyAllowed () const

bool	IsHighPrintAllowed () const

const unsigned char *	GetUValue () const
	Get the U object value (user)

const unsigned char *	GetOValue () const
	Get the O object value (owner)

const unsigned char *	GetEncryptionKey () const
	Get the encryption key value (owner)

pdf_int32	GetPValue () const
	Get the P object value (protection)

int	GetRevision () const
	Get the revision number of the encryption method.

int	GetKeyLength () const
	Get the key length of the encryption key in bits.

void	SetCurrentReference (const PdfReference &rRef)

Additional Inherited Members
Public Types inherited from PoDoFo::PdfEncrypt
enum	EPdfKeyLength

enum	EPdfPermissions { ePdfPermissions_Print = 0x00000004, ePdfPermissions_Edit = 0x00000008, ePdfPermissions_Copy = 0x00000010, ePdfPermissions_EditNotes = 0x00000020, ePdfPermissions_FillAndSign = 0x00000100, ePdfPermissions_Accessible = 0x00000200, ePdfPermissions_DocAssembly = 0x00000400, ePdfPermissions_HighPrint = 0x00000800 }

enum	EPdfEncryptAlgorithm { ePdfEncryptAlgorithm_RC4V1 = 1, ePdfEncryptAlgorithm_RC4V2 = 2, ePdfEncryptAlgorithm_AESV2 = 4 }

Static Public Member Functions inherited from PoDoFo::PdfEncryptMD5Base
static PdfString	GetMD5String (const unsigned char *pBuffer, int nLength)

static void	GetMD5Binary (const unsigned char data, int length, unsigned char digest)
	Calculate the binary MD5 message digest of the given data.

Static Public Member Functions inherited from PoDoFo::PdfEncrypt
static PdfEncrypt *	CreatePdfEncrypt (const std::string &userPassword, const std::string &ownerPassword, int protection=ePdfPermissions_Print\|ePdfPermissions_Edit\|ePdfPermissions_Copy\|ePdfPermissions_EditNotes\|ePdfPermissions_FillAndSign\|ePdfPermissions_Accessible\|ePdfPermissions_DocAssembly\|ePdfPermissions_HighPrint, EPdfEncryptAlgorithm eAlgorithm=ePdfEncryptAlgorithm_RC4V1, EPdfKeyLength eKeyLength=ePdfKeyLength_40)

static PdfEncrypt *	CreatePdfEncrypt (const PdfObject *pObject)

static PdfEncrypt *	CreatePdfEncrypt (const PdfEncrypt &rhs)

static int	GetEnabledEncryptionAlgorithms ()

static void	SetEnabledEncryptionAlgorithms (int nEncryptionAlgorithms)

static bool	IsEncryptionEnabled (EPdfEncryptAlgorithm eAlgorithm)

Protected Member Functions inherited from PoDoFo::PdfEncryptMD5Base
virtual void	GenerateInitialVector (unsigned char iv[16])
	Generate initial vector.

void	ComputeOwnerKey (unsigned char userPad[32], unsigned char ownerPad[32], int keylength, int revision, bool authenticate, unsigned char ownerKey[32])
	Compute owner key.

void	PadPassword (const std::string &password, unsigned char pswd[32])
	Pad a password to 32 characters.

void	ComputeEncryptionKey (const std::string &documentID, unsigned char userPad[32], unsigned char ownerKey[32], int pValue, int keyLength, int revision, unsigned char userKey[32])
	Compute encryption key and user key.

virtual void	CreateObjKey (unsigned char objkey[16], int *pnKeyLen) const

Protected Member Functions inherited from PoDoFo::PdfEncrypt
bool	CheckKey (unsigned char key1[32], unsigned char key2[32])
	Check two keys for equality.

Protected Member Functions inherited from PoDoFo::PdfEncryptRC4Base
void	RC4 (const unsigned char key, int keylen, const unsigned char textin, pdf_long textlen, unsigned char *textout, pdf_long textoutlen)
	AES encryption. More...

Protected Member Functions inherited from PoDoFo::PdfEncryptAESBase
void	AES (const unsigned char key, int keylen, const unsigned char iv, const unsigned char textin, pdf_long textlen, unsigned char textout, pdf_long textoutlen)
	AES encryption.

Protected Attributes inherited from PoDoFo::PdfEncryptMD5Base
unsigned char	m_rc4key [16]
	last RC4 key

unsigned char	m_rc4last [256]
	last RC4 state table

Protected Attributes inherited from PoDoFo::PdfEncrypt
EPdfEncryptAlgorithm	m_eAlgorithm
	The used encryption algorithm.

int	m_keyLength
	Length of encryption key.

int	m_rValue
	Revision.

pdf_int32	m_pValue
	P entry in pdf document.

EPdfKeyLength	m_eKeyLength
	The key length.

std::string	m_userPass
	User password.

std::string	m_ownerPass
	Owner password.

unsigned char	m_uValue [48]
	U entry in pdf document.

unsigned char	m_oValue [48]
	O entry in pdf document.

unsigned char	m_encryptionKey [32]
	Encryption key.

PdfReference	m_curReference
	Reference of the current PdfObject.

std::string	m_documentId
	DocumentID of the current document.

Protected Attributes inherited from PoDoFo::PdfEncryptRC4Base
RC4CryptoEngine *	m_rc4
	AES encryptor.

Protected Attributes inherited from PoDoFo::PdfEncryptAESBase
AESCryptoEngine *	m_aes
	AES encryptor.

Detailed Description

A class that is used to encrypt a PDF file (AES-128)

Client code is working only with PdfEncrypt class and knows nothing about PdfEncryptAES*, it is created through CreatePdfEncrypt factory method

Member Function Documentation

bool PoDoFo::PdfEncryptAESV2::Authenticate	(	const std::string &	password,
		const PdfString &	documentId
	)

virtual

Tries to authenticate a user using either the user or owner password

Parameters

password	owner or user password
documentId	the documentId of the PDF file

Returns: true if either the owner or user password matches password

Implements PoDoFo::PdfEncrypt.

PdfInputStream * PoDoFo::PdfEncryptAESV2::CreateEncryptionInputStream ( PdfInputStream * pInputStream )

virtual

Create a PdfInputStream that decrypts all data read from it using the current settings of the PdfEncrypt object.

Warning: Currently only RC4 based encryption is supported using output streams!

Parameters

pInputStream the created PdfInputStream reads all decrypted data to this input stream.

Returns: a PdfInputStream that decrypts all data.

Implements PoDoFo::PdfEncrypt.

PdfOutputStream * PoDoFo::PdfEncryptAESV2::CreateEncryptionOutputStream ( PdfOutputStream * pOutputStream )

virtual

Create a PdfOutputStream that encrypts all data written to it using the current settings of the PdfEncrypt object.

Warning: Currently only RC4 based encryption is supported using output streams!

Parameters

pOutputStream the created PdfOutputStream writes all encrypted data to this output stream.

Returns: a PdfOutputStream that encryts all data.

Implements PoDoFo::PdfEncrypt.

void PoDoFo::PdfEncryptAESV2::GenerateEncryptionKey ( const PdfString & documentId )

virtual

Generate encryption key from user and owner passwords and protection key

Parameters

documentId the documentId of the current document

Implements PoDoFo::PdfEncrypt.

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation