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Public key encryption: fixing bugs

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Jakub Melka
2022-06-18 17:18:07 +02:00
parent 44fc1e021c
commit 08697b902a
2 changed files with 116 additions and 2 deletions
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20
Pdf4QtLib/sources/pdfsecurityhandler.h
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@ -70,6 +70,7 @@ struct CryptFilter
AuthEvent authEvent = AuthEvent::DocOpen;
int keyLength = 0; ///< Key length in bytes
QByteArrayList recipients; ///< Recipients for public key security handler
bool encryptMetadata = true; ///< Encrypt metadata (for public key encryption)
};
class PDFSecurityHandler;
@ -200,6 +201,7 @@ public:
static PDFSecurityHandlerPointer createSecurityHandler(const PDFObject& encryptionDictionaryObject, const QByteArray& id);
protected:
static bool parseBool(const PDFDictionary* dictionary, const char* key, bool required, bool defaultValue = true);
static QByteArray parseName(const PDFDictionary* dictionary, const char* key, bool required, const char* defaultValue = nullptr);
static PDFInteger parseInt(const PDFDictionary* dictionary, const char* key, bool required, PDFInteger defaultValue = -1);
static CryptFilter parseCryptFilter(PDFInteger length, const PDFObject& object);
@ -406,6 +408,24 @@ public:
virtual bool isMetadataEncrypted() const override;
virtual bool isAllowed(Permission permission) const override;
virtual PDFObject createEncryptionDictionaryObject() const override;
private:
friend class PDFSecurityHandler;
friend class PDFSecurityHandlerFactory;
enum class PKCS7_Type
{
Unknown,
PKCS7_S3,
PKCS7_S4,
PKCS7_S5
};
/// What operations shall be permitted, when document is opened with user access.
uint32_t m_permissions = 0;
/// Type of the PKCS7 subfilter
PKCS7_Type m_pkcs7Type = PKCS7_Type::Unknown;
};
/// Factory, which creates security handler based on settings.