src/main/c/HybiAccept.cpp

// Copyright (c) 2013, Matt Godbolt
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions are met:
// 
// Redistributions of source code must retain the above copyright notice, this 
// list of conditions and the following disclaimer.
// 
// Redistributions in binary form must reproduce the above copyright notice, 
// this list of conditions and the following disclaimer in the documentation 
// and/or other materials provided with the distribution.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
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#include "internal/Base64.h"
#include "internal/HybiAccept.h"

#include "sha1/sha1.h"

#include <arpa/inet.h>

namespace seasocks {

static const std::string magicString("258EAFA5-E914-47DA-95CA-C5AB0DC85B11");

std::string getAcceptKey(const std::string& challenge) {
    auto fullString = challenge + magicString;
    SHA1 hasher;
    hasher.Input(fullString.c_str(), fullString.size());
    unsigned hash[5];
    hasher.Result(hash);
    for (int i = 0; i < 5; ++i) {
        hash[i] = htonl(hash[i]);
    }
    return base64Encode(hash, sizeof(hash));
}

}