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isaacs
3e1b1dd4a9
The copyright and license notice is already in the LICENSE file. There is no justifiable reason to also require that it be included in every file, since the individual files are not individually distributed except as part of the entire package.
116 lines
3.0 KiB
C++
116 lines
3.0 KiB
C++
#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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