#include <PdfEncrypt.h>
Inheritance diagram for PoDoFo::PdfEncrypt:
Public Types | |
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 } |
Public Member Functions | |
virtual | ~PdfEncrypt () |
const PdfEncrypt & | operator= (const PdfEncrypt &rhs) |
void | GenerateEncryptionKey (const PdfString &documentId) |
virtual void | CreateEncryptionDictionary (PdfDictionary &rDictionary) const =0 |
virtual PdfOutputStream * | CreateEncryptionOutputStream (PdfOutputStream *pOutputStream)=0 |
virtual PdfInputStream * | CreateEncryptionInputStream (PdfInputStream *pInputStream)=0 |
bool | Authenticate (const std::string &password, const PdfString &documentId) |
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). | |
int | 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 | Encrypt (std::string &str, pdf_long inputLen) const |
Encrypt a wxString. | |
virtual void | Encrypt (unsigned char *str, pdf_long len) const =0 |
Encrypt a character string. | |
virtual pdf_long | CalculateStreamLength (pdf_long length) const |
Calculate stream size. | |
virtual pdf_long | CalculateStreamOffset () const |
Calculate stream offset. | |
void | SetCurrentReference (const PdfReference &rRef) |
Static Public Member Functions | |
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) |
PdfEncrypt * | CreatePdfEncrypt (const PdfObject *pObject) |
PdfEncrypt * | CreatePdfEncrypt (const PdfEncrypt &rhs) |
int | GetEnabledEncryptionAlgorithms () |
void | SetEnabledEncryptionAlgorithms (int nEncryptionAlgorithms) |
bool | IsEncryptionEnabled (EPdfEncryptAlgorithm eAlgorithm) |
PdfString | GetMD5String (const unsigned char *pBuffer, int nLength) |
Protected Member Functions | |
void | PadPassword (const std::string &password, unsigned char pswd[32]) |
Pad a password to 32 characters. | |
void | ComputeOwnerKey (unsigned char userPad[32], unsigned char ownerPad[32], int keylength, int revision, bool authenticate, unsigned char ownerKey[32]) |
Compute owner key. | |
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. | |
bool | CheckKey (unsigned char key1[32], unsigned char key2[32]) |
Check two keys for equality. | |
void | RC4 (unsigned char *key, int keylen, unsigned char *textin, pdf_long textlen, unsigned char *textout) |
RC4 encryption. | |
void | GenerateInitialVector (unsigned char iv[16]) |
Generate initial vector. | |
void | CreateObjKey (unsigned char objkey[16], int *pnKeyLen) const |
Static Protected Member Functions | |
void | GetMD5Binary (const unsigned char *data, int length, unsigned char *digest) |
Calculate the binary MD5 message digest of the given data. | |
Protected Attributes | |
EPdfEncryptAlgorithm | m_eAlgorithm |
The used encryption algorithm. | |
int | m_keyLength |
Length of encryption key. | |
int | m_rValue |
Revision. | |
int | 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_rc4key [16] |
last RC4 key | |
unsigned char | m_rc4last [256] |
last RC4 state table | |
unsigned char | m_uValue [32] |
U entry in pdf document. | |
unsigned char | m_oValue [32] |
O entry in pdf document. |
As a user of this class, you have only to instanciate a object of this class and pass it to PdfWriter, PdfMemDocument, PdfStreamedDocument or PdfImmediateWriter. You do not have to call any other method of this class. The above classes know how to handle encryption using Pdfencrypt.
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The encryption algorithm. |
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A enum specifying a valid keylength for a PDF encryption key. Keys must be in the range 40 to 128 bit and have to be a multiple of 8. Adobe Reader supports only keys with 40 or 128bit! |
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Destruct the PdfEncrypt object |
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Tries to authenticate a user using either the user or owner password
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Fill all keys into a encryption dictionary. This dictionary is usually added to the PDF files trailer under the /Encryption key.
Implemented in PoDoFo::PdfEncryptAES, and PoDoFo::PdfEncryptRC4. |
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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!
Implemented in PoDoFo::PdfEncryptAES, and PoDoFo::PdfEncryptRC4. |
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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!
Implemented in PoDoFo::PdfEncryptAES, and PoDoFo::PdfEncryptRC4. |
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Create the encryption key for the current object.
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Copy constructor
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Initialize a PdfEncrypt object from an encryption dictionary in a PDF file. This is required for encrypting a PDF file, but handled internally in PdfParser for you. Will use only encrypting algorithms that are enabled.
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Create a PdfEncrypt object which can be used to encrypt a PDF file.
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Generate encryption key from user and owner passwords and protection key
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Retrieve the list of encryption algorithms that are used when loading a PDF document. By default all alogrithms are enabled.
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Get the encryption algorithm of this object.
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Create a PdfString of MD5 data generated from a buffer in memory.
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Checks if it is allowed to extract text and graphics to support users with disabillities Every PDF consuming applications has to adhere this value!
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Checks if text and graphics extraction is allowed. Every PDF consuming applications has to adhere this value!
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Checks if it is allowed to insert, create, rotate, delete pages or add bookmarks Every PDF consuming applications has to adhere this value!
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Checks if modifiying this document (besides annotations, form fields or changing pages) is allowed. Every PDF consuming applications has to adhere this value!
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Checks if it is allowed to add or modify annotations or form fields Every PDF consuming applications has to adhere this value!
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Test if a certain encryption algorithm is enabled for loading PDF documents.
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Checks if it is allowed to fill in existing form or signature fields Every PDF consuming applications has to adhere this value!
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Checks if it is allowed to print a high quality version of this document Every PDF consuming applications has to adhere this value!
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Checks if printing this document is allowed. Every PDF consuming applications has to adhere this value!
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Assignment operator
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RC4 encryption. RC4 is the standard encryption algorithm used in PDF format |
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Set the reference of the object that is currently encrypted. This value will be used in following calls of Encrypt to encrypt the object.
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Specify the list of encryption algorithms that should be used by PoDoFo when loading a PDF document. This can be used to disable for example AES encryption/decryption which is unstable in certain cases.
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