mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 20:12:43 +00:00
6e19ab2bbc
We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
70 lines
2 KiB
C++
70 lines
2 KiB
C++
/*
|
|
* Copyright (c) 2022, Matthew Olsson <mattco@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Span.h>
|
|
#include <LibPDF/ObjectDerivatives.h>
|
|
|
|
namespace PDF {
|
|
|
|
class SecurityHandler : public RefCounted<SecurityHandler> {
|
|
public:
|
|
static PDFErrorOr<NonnullRefPtr<SecurityHandler>> create(Document*, NonnullRefPtr<DictObject> encryption_dict);
|
|
|
|
virtual ~SecurityHandler() = default;
|
|
|
|
virtual bool try_provide_user_password(StringView password) = 0;
|
|
virtual bool has_user_password() const = 0;
|
|
|
|
virtual void encrypt(NonnullRefPtr<Object>, Reference reference) const = 0;
|
|
virtual void decrypt(NonnullRefPtr<Object>, Reference reference) const = 0;
|
|
};
|
|
|
|
class StandardSecurityHandler : public SecurityHandler {
|
|
public:
|
|
static PDFErrorOr<NonnullRefPtr<StandardSecurityHandler>> create(Document*, NonnullRefPtr<DictObject> encryption_dict);
|
|
|
|
StandardSecurityHandler(Document*, size_t revision, DeprecatedString const& o_entry, DeprecatedString const& u_entry, u32 flags, bool encrypt_metadata, size_t length);
|
|
|
|
~StandardSecurityHandler() override = default;
|
|
|
|
bool try_provide_user_password(StringView password_string) override;
|
|
|
|
bool has_user_password() const override { return m_encryption_key.has_value(); }
|
|
|
|
protected:
|
|
void encrypt(NonnullRefPtr<Object>, Reference reference) const override;
|
|
void decrypt(NonnullRefPtr<Object>, Reference reference) const override;
|
|
|
|
private:
|
|
template<bool is_revision_2>
|
|
ByteBuffer compute_user_password_value(ByteBuffer password_string);
|
|
|
|
ByteBuffer compute_encryption_key(ByteBuffer password_string);
|
|
|
|
Document* m_document;
|
|
size_t m_revision;
|
|
Optional<ByteBuffer> m_encryption_key;
|
|
DeprecatedString m_o_entry;
|
|
DeprecatedString m_u_entry;
|
|
u32 m_flags;
|
|
bool m_encrypt_metadata;
|
|
size_t m_length;
|
|
};
|
|
|
|
class RC4 {
|
|
public:
|
|
RC4(ReadonlyBytes key);
|
|
|
|
void generate_bytes(ByteBuffer&);
|
|
ByteBuffer encrypt(ReadonlyBytes bytes);
|
|
|
|
private:
|
|
Array<size_t, 256> m_bytes;
|
|
};
|
|
|
|
}
|