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POHTTPS request with Boost.Asio and OpenSSL
 

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  1. POHTTPS request with Boost.Asio and OpenSSL
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    <p>I'm trying to read the ticker symbol at <a href="https://mtgox.com/api/0/data/ticker.php" rel="nofollow noreferrer">https://mtgox.com/api/0/data/ticker.php</a> from my C++ application. I use Boost.Asio and OpenSSL because the service requires HTTPS.</p> <p>Boost version: 1.47.0</p> <p>OpenSSL: 1.0.0d [8 Feb 2011] Win32</p> <p>For the application; I took the example from <a href="http://www.boost.org/doc/libs/1_47_0/doc/html/boost_asio/example/ssl/client.cpp" rel="nofollow noreferrer">http://www.boost.org/doc/libs/1_47_0/doc/html/boost_asio/example/ssl/client.cpp</a> to get started and modified it as follows:</p> <p>This is where I want to connect to:</p> <pre><code>boost::asio::ip::tcp::resolver::query query("mtgox.com", "443"); </code></pre> <p>I set verification to none because the handshake fails otherwise. I'm not sure if this is a problem with mtgox or that this implementation is really strict because when I print the certificate to the screen it looks legit (and chrome has no problem with it when visiting the ticker page).</p> <pre><code>socket_.set_verify_mode(boost::asio::ssl::context::verify_none); </code></pre> <p>This is the request I send:</p> <pre><code>std::stringstream request_; request_ &lt;&lt; "GET /api/0/data/ticker.php HTTP/1.1\r\n"; request_ &lt;&lt; "Host: mtgox.com\r\n"; request_ &lt;&lt; "Accept-Encoding: *\r\n"; request_ &lt;&lt; "\r\n"; boost::asio::async_write(socket_, boost::asio::buffer(request_.str()), boost::bind(&amp;client::handle_write, this, boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); </code></pre> <p>(full code: <a href="http://pastebin.com/zRTTqZVe" rel="nofollow noreferrer">http://pastebin.com/zRTTqZVe</a>)</p> <p>I run into the following error:</p> <pre><code>Connection OK! Verifying: /C=IL/O=StartCom Ltd./OU=Secure Digital Certificate Signing/CN=StartCom Certification Authority Sending request: GET /api/0/data/ticker.php HTTP 1.1 Host: mtgox.com Accept-Encoding: * Sending request OK! Read failed: An existing connection was forcibly closed by the remote host </code></pre> <p>Am I going in the right direction with this? The error message isn't really descriptive of the problem and I don't know which step I did wrong.</p> <p><strong>Update:</strong> I used cURL to see what went wrong:</p> <pre><code>curl --trace-ascii out.txt https://mtgox.com/api/0/data/ticker.php </code></pre> <p>(full output: <a href="http://pastebin.com/Rzp0RnAK" rel="nofollow noreferrer">http://pastebin.com/Rzp0RnAK</a>) It fails during verification. When I connect with the "unsafe" parameter</p> <pre><code>curl --trace-ascii out.txt -k https://mtgox.com/api/0/data/ticker.php </code></pre> <p>(full output: <a href="http://pastebin.com/JR43A7ux" rel="nofollow noreferrer">http://pastebin.com/JR43A7ux</a>)</p> <p>everything works fine. </p> <p><strong>Fix:</strong></p> <ol> <li>I fixed the typo in the HTTP headers </li> <li>I added a root certificate and turned SSL verification back on.</li> </ol>
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    1. COWhy did you generate a key? You're not signing anything, the server is. You'll need to trust the server's root cert though.
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    2. COHave you tried sending that request eg via curl to see if the server accepts it?
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    3. COGood idea! I have updated the question.
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