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Public key encryption: authorization, create file encryption key

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This commit is contained in:
Jakub Melka
2022-06-18 14:05:10 +02:00
parent c20959c190
commit 44fc1e021c
4 changed files with 298 additions and 129 deletions
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26
Pdf4QtLib/sources/pdfsecurityhandler.h
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@ -264,6 +264,9 @@ public:
virtual AuthorizationResult getAuthorizationResult() const override { return m_authorizationData.authorizationResult; }
virtual bool isEncryptionAllowed() const override { return m_authorizationData.isAuthorized(); }
/// Adjusts the password according to the PDF specification
static QByteArray adjustPassword(const QString& password, int revision);
struct AuthorizationData
{
bool isAuthorized() const { return authorizationResult == AuthorizationResult::UserAuthorized || authorizationResult == AuthorizationResult::OwnerAuthorized; }
@ -287,6 +290,16 @@ protected:
/// \returns Encrypted data
QByteArray encryptUsingFilter(const QByteArray& data, CryptFilter filter, PDFObjectReference reference) const;
/// Returns true, if character with unicode code is non-ascii space character
/// according the RFC 3454, section C.1.2
/// \param unicode Unicode code to be tested
static bool isUnicodeNonAsciiSpaceCharacter(ushort unicode);
/// Returns true, if character with unicode code is mapped to nothing,
/// according the RFC 3454, section B.1
/// \param unicode Unicode code to be tested
static bool isUnicodeMappedToNothing(ushort unicode);
std::vector<uint8_t> createV2_ObjectEncryptionKey(PDFObjectReference reference, CryptFilter filter) const;
std::vector<uint8_t> createAESV2_ObjectEncryptionKey(PDFObjectReference reference) const;
CryptFilter getCryptFilter(EncryptionScope encryptionScope) const;
@ -307,9 +320,6 @@ public:
virtual bool isAllowed(Permission permission) const override { return m_authorizationData.authorizationResult == AuthorizationResult::OwnerAuthorized || (m_permissions & static_cast<uint32_t>(permission)); }
virtual PDFObject createEncryptionDictionaryObject() const override;
/// Adjusts the password according to the PDF specification
static QByteArray adjustPassword(const QString& password, int revision);
private:
friend class PDFSecurityHandler;
friend class PDFSecurityHandlerFactory;
@ -351,16 +361,6 @@ private:
/// Parses parts of the user/owner data (U/O values of the encryption dictionary)
UserOwnerData_r6 parseParts(const QByteArray& data) const;
/// Returns true, if character with unicode code is non-ascii space character
/// according the RFC 3454, section C.1.2
/// \param unicode Unicode code to be tested
static bool isUnicodeNonAsciiSpaceCharacter(ushort unicode);
/// Returns true, if character with unicode code is mapped to nothing,
/// according the RFC 3454, section B.1
/// \param unicode Unicode code to be tested
static bool isUnicodeMappedToNothing(ushort unicode);
/// Revision number of standard security number
int m_R = 0;