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7caa87862e
All #ifndef guards on headers have been removed, I think, in favor of #pragma once Headers are now included as `#include "filename"` if the included file resides in the same directory as the file including it, or any subdirectory therein. Otherwise they are included as `#include <project/top/dir/relative/path/filename>` The above does not include system/os headers.
87 lines
2.1 KiB
C++
87 lines
2.1 KiB
C++
#pragma once
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#include "encrypted.hpp"
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#include "types.hpp"
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#include <llarp/util/buffer.hpp>
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#include <utility>
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#include <llarp/util/mem.h>
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namespace llarp
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{
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static constexpr size_t EncryptedFrameOverheadSize = PUBKEYSIZE + TUNNONCESIZE + SHORTHASHSIZE;
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static constexpr size_t EncryptedFrameBodySize = 128 * 6;
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static constexpr size_t EncryptedFrameSize = EncryptedFrameOverheadSize + EncryptedFrameBodySize;
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struct EncryptedFrame : public Encrypted<EncryptedFrameSize>
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{
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EncryptedFrame() : EncryptedFrame(EncryptedFrameBodySize)
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{}
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EncryptedFrame(size_t sz)
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: Encrypted<EncryptedFrameSize>(
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std::min(sz, EncryptedFrameBodySize) + EncryptedFrameOverheadSize)
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{}
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void
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Resize(size_t sz)
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{
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if (sz <= EncryptedFrameSize)
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{
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_sz = sz;
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UpdateBuffer();
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}
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}
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bool
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DoEncrypt(const SharedSecret& shared, bool noDH = false);
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bool
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DecryptInPlace(const SecretKey& seckey);
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bool
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DoDecrypt(const SharedSecret& shared);
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bool
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EncryptInPlace(const SecretKey& seckey, const PubKey& other);
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};
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/// TODO: can only handle 1 frame at a time
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template <typename User>
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struct AsyncFrameDecrypter
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{
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using User_ptr = std::shared_ptr<User>;
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using DecryptHandler = std::function<void(llarp_buffer_t*, User_ptr)>;
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void
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Decrypt(User_ptr user)
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{
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if (target.DecryptInPlace(seckey))
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{
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auto buf = target.Buffer();
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buf->cur = buf->base + EncryptedFrameOverheadSize;
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result(buf, user);
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}
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else
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result(nullptr, user);
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}
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AsyncFrameDecrypter(const SecretKey& secretkey, DecryptHandler h)
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: result(std::move(h)), seckey(secretkey)
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{}
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DecryptHandler result;
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const SecretKey& seckey;
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EncryptedFrame target;
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using WorkFunc_t = std::function<void(void)>;
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using WorkerFunction_t = std::function<void(WorkFunc_t)>;
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void
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AsyncDecrypt(const EncryptedFrame& frame, User_ptr u, WorkerFunction_t worker)
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{
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target = frame;
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worker(std::bind(&AsyncFrameDecrypter<User>::Decrypt, this, std::move(u)));
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}
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};
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} // namespace llarp
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