104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
#include <event2/bufferevent.h>
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#include <event2/event.h>
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#include <event2/listener.h>
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#include <string>
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#include "tlv.h"
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class CryptoBase {
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public:
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virtual ~CryptoBase() {};
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static std::string BinToHex(const std::string& bin);
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static void GenKey(std::string* key);
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static void GenKeyPair(std::string* secret_key, std::string* public_key);
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static void DerivePublicKey(const std::string& secret_key, std::string* public_key);
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static void ReadKeyFromFile(const std::string& filename, std::string* key);
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static void WriteKeyToFile(const std::string& filename, const std::string& key);
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static void EncodeEncryptAppend(const std::string& secret_key, const std::string& public_key, const TLVNode& input, TLVNode* container);
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TLVNode *DecryptDecode(const std::string& secret_key, const std::string& public_key, const TLVNode& input);
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std::ostream& Log(void *obj=nullptr);
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std::ostream& LogFatal(void *obj=nullptr);
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};
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class CryptoPubServerConnection;
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class CryptoPubServer : public CryptoBase {
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public:
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CryptoPubServer(const std::string& secret_key);
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~CryptoPubServer();
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void Loop();
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private:
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static void OnNewConn_(struct evconnlistener* listener, int fd, struct sockaddr* client_addr, int client_addrlen, void* this__);
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void OnNewConn(int fd, struct sockaddr* client_addr, int client_addrlen);
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struct event_base* event_base_;
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struct evconnlistener* listener_;
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const std::string secret_key_;
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};
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class CryptoPubServerConnection : public CryptoBase {
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public:
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CryptoPubServerConnection(struct bufferevent* bev, const std::string& secret_key);
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~CryptoPubServerConnection();
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private:
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static void OnReadable_(struct bufferevent* bev, void* this__);
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void OnReadable();
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void OnHandshake(const std::string& input);
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static void OnError_(struct bufferevent* bev, const short what, void* this__);
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void OnError(const short what);
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struct bufferevent* bev_;
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const std::string secret_key_;
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std::string ephemeral_secret_key_;
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std::string client_public_key_;
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std::string client_ephemeral_public_key_;
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enum {
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AWAITING_HANDSHAKE,
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READY,
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} state_;
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friend CryptoPubServer;
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};
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class CryptoPubClient : public CryptoBase {
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public:
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CryptoPubClient(struct sockaddr* addr, socklen_t addrlen, const std::string& secret_key, const std::string& server_public_key);
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~CryptoPubClient();
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static CryptoPubClient* FromHostname(const std::string& server_address, const std::string& server_port, const std::string& secret_key, const std::string& server_public_key);
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void Loop();
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private:
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static void OnReadable_(struct bufferevent* bev, void* this__);
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void OnReadable();
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void OnHandshake(const std::string& input);
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static void OnConnectOrError_(struct bufferevent* bev, const short what, void* this__);
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void OnConnect();
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void OnError();
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struct event_base* event_base_;
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struct bufferevent* bev_;
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const std::string secret_key_;
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const std::string server_public_key_;
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std::string public_key_;
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std::string ephemeral_secret_key_;
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std::string server_ephemeral_public_key_;
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enum {
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AWAITING_HANDSHAKE,
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READY,
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} state_;
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};
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