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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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#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> // NULL
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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_(NULL),
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onend_cb_(NULL),
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cb_arg_(NULL) {
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Reset();
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}
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class ClientHello {
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public:
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ClientHello() {
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}
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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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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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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 uint8_t kSSL2TwoByteHeaderBit = 0x80;
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static const uint8_t kSSL2HeaderMask = 0x3f;
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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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enum ParseState {
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kWaiting,
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kTLSHeader,
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kSSL2Header,
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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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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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#ifdef OPENSSL_NO_SSL2
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bool ParseSSL2ClientHello(const uint8_t* data, size_t avail);
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#endif // OPENSSL_NO_SSL2
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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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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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