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LibPDF: Add implementation of the Standard security handler

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Security handlers manage encryption and decription of PDF files. The
standard security handler uses RC4/MD5 to perform its crypto (AES as
well, but that is not yet implemented).
This commit is contained in:
Matthew Olsson 2022-03-20 14:24:23 -07:00 • committed by Andreas Kling
parent c98bda8ce6
commit 5b316462b2
9 changed files with 522 additions and 3 deletions
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12
Userland/Libraries/LibPDF/Document.h
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@ -11,6 +11,7 @@
#include <AK/RefCounted.h>
#include <AK/Weakable.h>
#include <LibGfx/Color.h>
#include <LibPDF/Encryption.h>
#include <LibPDF/Error.h>
#include <LibPDF/ObjectDerivatives.h>
#include <LibPDF/Parser.h>
@ -78,8 +79,17 @@ class Document final
public:
static PDFErrorOr<NonnullRefPtr<Document>> create(ReadonlyBytes bytes);
// If a security handler is present, it is the caller's responsibility to ensure
// this document is unencrypted before calling this function. The user does not
// need to handle the case where the user password is the empty string.
PDFErrorOr<void> initialize();
ALWAYS_INLINE RefPtr<SecurityHandler> const& security_handler() const { return m_security_handler; }
ALWAYS_INLINE RefPtr<OutlineDict> const& outline() const { return m_outline; }
ALWAYS_INLINE RefPtr<DictObject> const& trailer() const { return m_trailer; }
[[nodiscard]] PDFErrorOr<Value> get_or_load_value(u32 index);
[[nodiscard]] u32 get_first_page_index() const;
@ -139,10 +149,12 @@ private:
NonnullRefPtr<Parser> m_parser;
RefPtr<DictObject> m_catalog;
RefPtr<DictObject> m_trailer;
Vector<u32> m_page_object_indices;
HashMap<u32, Page> m_pages;
HashMap<u32, Value> m_values;
RefPtr<OutlineDict> m_outline;
RefPtr<SecurityHandler> m_security_handler;
};
}