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115 lines
3.0 KiB
115 lines
3.0 KiB
#ifndef SRC_NODE_CRYPTO_CLIENTHELLO_H_
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#define SRC_NODE_CRYPTO_CLIENTHELLO_H_
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#include "node.h"
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#include <stddef.h> // size_t
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#include <stdlib.h> // nullptr
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namespace node {
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class ClientHelloParser {
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public:
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ClientHelloParser() : state_(kEnded),
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onhello_cb_(nullptr),
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onend_cb_(nullptr),
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cb_arg_(nullptr),
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session_size_(0),
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session_id_(nullptr),
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servername_size_(0),
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servername_(nullptr),
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ocsp_request_(0),
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tls_ticket_size_(0),
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tls_ticket_(nullptr) {
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Reset();
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}
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class ClientHello {
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public:
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inline uint8_t session_size() const { return session_size_; }
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inline const uint8_t* session_id() const { return session_id_; }
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inline bool has_ticket() const { return has_ticket_; }
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inline uint8_t servername_size() const { return servername_size_; }
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inline const uint8_t* servername() const { return servername_; }
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inline int ocsp_request() const { return ocsp_request_; }
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private:
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uint8_t session_size_;
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const uint8_t* session_id_;
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bool has_ticket_;
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uint8_t servername_size_;
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const uint8_t* servername_;
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int ocsp_request_;
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friend class ClientHelloParser;
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};
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typedef void (*OnHelloCb)(void* arg, const ClientHello& hello);
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typedef void (*OnEndCb)(void* arg);
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void Parse(const uint8_t* data, size_t avail);
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inline void Reset();
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inline void Start(OnHelloCb onhello_cb, OnEndCb onend_cb, void* onend_arg);
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inline void End();
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inline bool IsPaused() const;
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inline bool IsEnded() const;
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private:
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static const size_t kMaxTLSFrameLen = 16 * 1024 + 5;
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static const size_t kMaxSSLExFrameLen = 32 * 1024;
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static const uint8_t kServernameHostname = 0;
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static const uint8_t kStatusRequestOCSP = 1;
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static const size_t kMinStatusRequestSize = 5;
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enum ParseState {
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kWaiting,
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kTLSHeader,
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kPaused,
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kEnded
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};
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enum FrameType {
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kChangeCipherSpec = 20,
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kAlert = 21,
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kHandshake = 22,
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kApplicationData = 23,
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kOther = 255
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};
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enum HandshakeType {
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kClientHello = 1
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};
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enum ExtensionType {
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kServerName = 0,
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kStatusRequest = 5,
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kTLSSessionTicket = 35
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};
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bool ParseRecordHeader(const uint8_t* data, size_t avail);
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void ParseHeader(const uint8_t* data, size_t avail);
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void ParseExtension(ExtensionType type,
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const uint8_t* data,
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size_t len);
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bool ParseTLSClientHello(const uint8_t* data, size_t avail);
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ParseState state_;
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OnHelloCb onhello_cb_;
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OnEndCb onend_cb_;
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void* cb_arg_;
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size_t frame_len_;
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size_t body_offset_;
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size_t extension_offset_;
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uint8_t session_size_;
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const uint8_t* session_id_;
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uint16_t servername_size_;
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const uint8_t* servername_;
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uint8_t ocsp_request_;
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uint16_t tls_ticket_size_;
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const uint8_t* tls_ticket_;
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};
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} // namespace node
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#endif // SRC_NODE_CRYPTO_CLIENTHELLO_H_
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