| //======================================================================== |
| // |
| // SecurityHandler.h |
| // |
| // Copyright 2004 Glyph & Cog, LLC |
| // |
| //======================================================================== |
| |
| //======================================================================== |
| // |
| // Modified under the Poppler project - http://poppler.freedesktop.org |
| // |
| // All changes made under the Poppler project to this file are licensed |
| // under GPL version 2 or later |
| // |
| // Copyright (C) 2012 Albert Astals Cid <aacid@kde.org> |
| // |
| // To see a description of the changes please see the Changelog file that |
| // came with your tarball or type make ChangeLog if you are building from git |
| // |
| //======================================================================== |
| |
| #ifndef SECURITYHANDLER_H |
| #define SECURITYHANDLER_H |
| |
| #include "poppler-config.h" |
| |
| #ifdef USE_GCC_PRAGMAS |
| #pragma interface |
| #endif |
| |
| #include "goo/gtypes.h" |
| #include "Object.h" |
| |
| class GooString; |
| class PDFDoc; |
| struct XpdfSecurityHandler; |
| |
| //------------------------------------------------------------------------ |
| // SecurityHandler |
| //------------------------------------------------------------------------ |
| |
| class SecurityHandler { |
| public: |
| |
| static SecurityHandler *make(PDFDoc *docA, Object *encryptDictA); |
| |
| SecurityHandler(PDFDoc *docA); |
| virtual ~SecurityHandler(); |
| |
| // Returns true if the file is actually unencrypted. |
| virtual GBool isUnencrypted() { return gFalse; } |
| |
| // Check the document's encryption. If the document is encrypted, |
| // this will first try <ownerPassword> and <userPassword> (in |
| // "batch" mode), and if those fail, it will attempt to request a |
| // password from the user. This is the high-level function that |
| // calls the lower level functions for the specific security handler |
| // (requesting a password three times, etc.). Returns true if the |
| // document can be opened (if it's unencrypted, or if a correct |
| // password is obtained); false otherwise (encrypted and no correct |
| // password). |
| GBool checkEncryption(GooString *ownerPassword, |
| GooString *userPassword); |
| |
| // Create authorization data for the specified owner and user |
| // passwords. If the security handler doesn't support "batch" mode, |
| // this function should return NULL. |
| virtual void *makeAuthData(GooString *ownerPassword, |
| GooString *userPassword) = 0; |
| |
| // Construct authorization data, typically by prompting the user for |
| // a password. Returns an authorization data object, or NULL to |
| // cancel. |
| virtual void *getAuthData() = 0; |
| |
| // Free the authorization data returned by makeAuthData or |
| // getAuthData. |
| virtual void freeAuthData(void *authData) = 0; |
| |
| // Attempt to authorize the document, using the supplied |
| // authorization data (which may be NULL). Returns true if |
| // successful (i.e., if at least the right to open the document was |
| // granted). |
| virtual GBool authorize(void *authData) = 0; |
| |
| // Return the various authorization parameters. These are only |
| // valid after authorize has returned true. |
| virtual int getPermissionFlags() = 0; |
| virtual GBool getOwnerPasswordOk() = 0; |
| virtual Guchar *getFileKey() = 0; |
| virtual int getFileKeyLength() = 0; |
| virtual int getEncVersion() = 0; |
| virtual int getEncRevision() = 0; |
| virtual CryptAlgorithm getEncAlgorithm() = 0; |
| |
| protected: |
| |
| PDFDoc *doc; |
| }; |
| |
| //------------------------------------------------------------------------ |
| // StandardSecurityHandler |
| //------------------------------------------------------------------------ |
| |
| class StandardSecurityHandler: public SecurityHandler { |
| public: |
| |
| StandardSecurityHandler(PDFDoc *docA, Object *encryptDictA); |
| virtual ~StandardSecurityHandler(); |
| |
| virtual GBool isUnencrypted(); |
| virtual void *makeAuthData(GooString *ownerPassword, |
| GooString *userPassword); |
| virtual void *getAuthData(); |
| virtual void freeAuthData(void *authData); |
| virtual GBool authorize(void *authData); |
| virtual int getPermissionFlags() { return permFlags; } |
| virtual GBool getOwnerPasswordOk() { return ownerPasswordOk; } |
| virtual Guchar *getFileKey() { return fileKey; } |
| virtual int getFileKeyLength() { return fileKeyLength; } |
| virtual int getEncVersion() { return encVersion; } |
| virtual int getEncRevision() { return encRevision; } |
| virtual CryptAlgorithm getEncAlgorithm() { return encAlgorithm; } |
| |
| private: |
| |
| int permFlags; |
| GBool ownerPasswordOk; |
| Guchar fileKey[32]; |
| int fileKeyLength; |
| int encVersion; |
| int encRevision; |
| GBool encryptMetadata; |
| CryptAlgorithm encAlgorithm; |
| |
| GooString *ownerKey, *userKey; |
| GooString *ownerEnc, *userEnc; |
| GooString *fileID; |
| GBool ok; |
| }; |
| |
| #ifdef ENABLE_PLUGINS |
| //------------------------------------------------------------------------ |
| // ExternalSecurityHandler |
| //------------------------------------------------------------------------ |
| |
| class ExternalSecurityHandler: public SecurityHandler { |
| public: |
| |
| ExternalSecurityHandler(PDFDoc *docA, Object *encryptDictA, |
| XpdfSecurityHandler *xshA); |
| virtual ~ExternalSecurityHandler(); |
| |
| virtual void *makeAuthData(GooString *ownerPassword, |
| GooString *userPassword); |
| virtual void *getAuthData(); |
| virtual void freeAuthData(void *authData); |
| virtual GBool authorize(void *authData); |
| virtual int getPermissionFlags() { return permFlags; } |
| virtual GBool getOwnerPasswordOk() { return gFalse; } |
| virtual Guchar *getFileKey() { return fileKey; } |
| virtual int getFileKeyLength() { return fileKeyLength; } |
| virtual int getEncVersion() { return encVersion; } |
| virtual int getEncRevision() { return encRevision; } |
| virtual CryptAlgorithm getEncAlgorithm() { return encAlgorithm; } |
| |
| private: |
| |
| Object encryptDict; |
| XpdfSecurityHandler *xsh; |
| void *docData; |
| int permFlags; |
| Guchar fileKey[16]; |
| int fileKeyLength; |
| int encVersion; |
| int encRevision; |
| CryptAlgorithm encAlgorithm; |
| GBool ok; |
| }; |
| #endif // ENABLE_PLUGINS |
| |
| #endif |