frnetlib/include/SSLSocket.h

//
// Created by fred on 12/12/16.
//

#ifndef FRNETLIB_SSL_SOCKET_H
#define FRNETLIB_SSL_SOCKET_H

#define SSL_ENABLED

#ifdef SSL_ENABLED

#include "TcpSocket.h"
#include <mbedtls/net_sockets.h>
#include <mbedtls/debug.h>
#include <mbedtls/ssl.h>
#include <mbedtls/entropy.h>
#include <mbedtls/ctr_drbg.h>
#include <mbedtls/error.h>
#include <mbedtls/certs.h>

const std::string certs =
        "-----BEGIN CERTIFICATE-----\n"
        "MIIHyTCCBbGgAwIBAgIBATANBgkqhkiG9w0BAQUFADB9MQswCQYDVQQGEwJJTDEW\n"
        "MBQGA1UEChMNU3RhcnRDb20gTHRkLjErMCkGA1UECxMiU2VjdXJlIERpZ2l0YWwg\n"
        "Q2VydGlmaWNhdGUgU2lnbmluZzEpMCcGA1UEAxMgU3RhcnRDb20gQ2VydGlmaWNh\n"
        "dGlvbiBBdXRob3JpdHkwHhcNMDYwOTE3MTk0NjM2WhcNMzYwOTE3MTk0NjM2WjB9\n"
        "MQswCQYDVQQGEwJJTDEWMBQGA1UEChMNU3RhcnRDb20gTHRkLjErMCkGA1UECxMi\n"
        "U2VjdXJlIERpZ2l0YWwgQ2VydGlmaWNhdGUgU2lnbmluZzEpMCcGA1UEAxMgU3Rh\n"
        "cnRDb20gQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwggIiMA0GCSqGSIb3DQEBAQUA\n"
        "A4ICDwAwggIKAoICAQDBiNsJvGxGfHiflXu1M5DycmLWwTYgIiRezul38kMKogZk\n"
        "pMyONvg45iPwbm2xPN1yo4UcodM9tDMr0y+v/uqwQVlntsQGfQqedIXWeUyAN3rf\n"
        "OQVSWff0G0ZDpNKFhdLDcfN1YjS6LIp/Ho/u7TTQEceWzVI9ujPW3U3eCztKS5/C\n"
        "Ji/6tRYccjV3yjxd5srhJosaNnZcAdt0FCX+7bWgiA/deMotHweXMAEtcnn6RtYT\n"
        "Kqi5pquDSR3l8u/d5AGOGAqPY1MWhWKpDhk6zLVmpsJrdAfkK+F2PrRt2PZE4XNi\n"
        "HzvEvqBTViVsUQn3qqvKv3b9bZvzndu/PWa8DFaqr5hIlTpL36dYUNk4dalb6kMM\n"
        "Av+Z6+hsTXBbKWWc3apdzK8BMewM69KN6Oqce+Zu9ydmDBpI125C4z/eIT574Q1w\n"
        "+2OqqGwaVLRcJXrJosmLFqa7LH4XXgVNWG4SHQHuEhANxjJ/GP/89PrNbpHoNkm+\n"
        "Gkhpi8KWTRoSsmkXwQqQ1vp5Iki/untp+HDH+no32NgN0nZPV/+Qt+OR0t3vwmC3\n"
        "Zzrd/qqc8NSLf3Iizsafl7b4r4qgEKjZ+xjGtrVcUjyJthkqcwEKDwOzEmDyei+B\n"
        "26Nu/yYwl/WL3YlXtq09s68rxbd2AvCl1iuahhQqcvbjM4xdCUsT37uMdBNSSwID\n"
        "AQABo4ICUjCCAk4wDAYDVR0TBAUwAwEB/zALBgNVHQ8EBAMCAa4wHQYDVR0OBBYE\n"
        "FE4L7xqkQFulF2mHMMo0aEPQQa7yMGQGA1UdHwRdMFswLKAqoCiGJmh0dHA6Ly9j\n"
        "ZXJ0LnN0YXJ0Y29tLm9yZy9zZnNjYS1jcmwuY3JsMCugKaAnhiVodHRwOi8vY3Js\n"
        "LnN0YXJ0Y29tLm9yZy9zZnNjYS1jcmwuY3JsMIIBXQYDVR0gBIIBVDCCAVAwggFM\n"
        "BgsrBgEEAYG1NwEBATCCATswLwYIKwYBBQUHAgEWI2h0dHA6Ly9jZXJ0LnN0YXJ0\n"
        "Y29tLm9yZy9wb2xpY3kucGRmMDUGCCsGAQUFBwIBFilodHRwOi8vY2VydC5zdGFy\n"
        "dGNvbS5vcmcvaW50ZXJtZWRpYXRlLnBkZjCB0AYIKwYBBQUHAgIwgcMwJxYgU3Rh\n"
        "cnQgQ29tbWVyY2lhbCAoU3RhcnRDb20pIEx0ZC4wAwIBARqBl0xpbWl0ZWQgTGlh\n"
        "YmlsaXR5LCByZWFkIHRoZSBzZWN0aW9uICpMZWdhbCBMaW1pdGF0aW9ucyogb2Yg\n"
        "dGhlIFN0YXJ0Q29tIENlcnRpZmljYXRpb24gQXV0aG9yaXR5IFBvbGljeSBhdmFp\n"
        "bGFibGUgYXQgaHR0cDovL2NlcnQuc3RhcnRjb20ub3JnL3BvbGljeS5wZGYwEQYJ\n"
        "YIZIAYb4QgEBBAQDAgAHMDgGCWCGSAGG+EIBDQQrFilTdGFydENvbSBGcmVlIFNT\n"
        "TCBDZXJ0aWZpY2F0aW9uIEF1dGhvcml0eTANBgkqhkiG9w0BAQUFAAOCAgEAFmyZ\n"
        "9GYMNPXQhV59CuzaEE44HF7fpiUFS5Eyweg78T3dRAlbB0mKKctmArexmvclmAk8\n"
        "jhvh3TaHK0u7aNM5Zj2gJsfyOZEdUauCe37Vzlrk4gNXcGmXCPleWKYK34wGmkUW\n"
        "FjgKXlf2Ysd6AgXmvB618p70qSmD+LIU424oh0TDkBreOKk8rENNZEXO3SipXPJz\n"
        "ewT4F+irsfMuXGRuczE6Eri8sxHkfY+BUZo7jYn0TZNmezwD7dOaHZrzZVD1oNB1\n"
        "ny+v8OqCQ5j4aZyJecRDjkZy42Q2Eq/3JR44iZB3fsNrarnDy0RLrHiQi+fHLB5L\n"
        "EUTINFInzQpdn4XBidUaePKVEFMy3YCEZnXZtWgo+2EuvoSoOMCZEoalHmdkrQYu\n"
        "L6lwhceWD3yJZfWOQ1QOq92lgDmUYMA0yZZwLKMS9R9Ie70cfmu3nZD0Ijuu+Pwq\n"
        "yvqCUqDvr0tVk+vBtfAii6w0TiYiBKGHLHVKt+V9E9e4DGTANtLJL4YSjCMJwRuC\n"
        "O3NJo2pXh5Tl1njFmUNj403gdy3hZZlyaQQaRwnmDwFWJPsfvw55qVguucQJAX6V\n"
        "um0ABj6y6koQOdjQK/W/7HW/lwLFCRsI3FU34oH7N4RDYiDK51ZLZer+bMEkkySh\n"
        "NOsF/5oirpt9P/FlUQqmMGqz9IgcgA38corog14=\n"
        "-----END CERTIFICATE-----";

namespace fr
{
    class SSLSocket : public Socket
    {
    public:
        SSLSocket() noexcept;

        ~SSLSocket() noexcept;

        SSLSocket(SSLSocket &&) noexcept = default;

        /*!
         * Effectively just fr::TcpSocket::send_raw() with encryption
         * added in.
         *
         * @param data The data to send.
         * @param size The number of bytes, from data to send. Be careful not to overflow.
         * @return The status of the operation.
         */
        Socket::Status send_raw(const char *data, size_t size) override;


        /*!
         * Effectively just fr::TcpSocket::receive_raw() with encryption
         * added in.
         *
         * @param data Where to store the received data.
         * @param data_size The number of bytes to try and receive. Be sure that it's not larger than data.
         * @param received Will be filled with the number of bytes actually received, might be less than you requested.
         * @return The status of the operation, if the socket has disconnected etc.
         */
        Socket::Status receive_raw(void *data, size_t data_size, size_t &received) override;

        /*!
         * Close the connection.
         */
        void close() override;

        /*!
         * Connects the socket to an address.
         *
         * @param address The address of the socket to connect to
         * @param port The port of the socket to connect to
         * @return A Socket::Status indicating the status of the operation.
         */
        Socket::Status connect(const std::string &address, const std::string &port) override;

        /*!
         * Set the SSL context
         *
         * @param context The SSL context to use
         */
        void set_ssl_context(std::unique_ptr<mbedtls_ssl_context> context);

        /*!
         * Set the NET context
         *
         * @param context The NET context to use
         */
        void set_net_context(std::unique_ptr<mbedtls_net_context> context);

        /*!
         * Gets the underlying socket descriptor.
         *
         * @return The socket's descriptor.
         */
        virtual int32_t get_socket_descriptor() const override
        {
            return ssl_socket_descriptor->fd;
        }

        /*!
         * Sets if the socket should block or not.
         *
         * @param should_block True to block, false otherwise.
         */
        virtual void set_blocking(bool should_block) override
        {
            abort();
        }

    private:
        std::string unprocessed_buffer;
        std::unique_ptr<char[]> recv_buffer;

        std::unique_ptr<mbedtls_net_context> ssl_socket_descriptor;
        mbedtls_entropy_context entropy;
        mbedtls_ctr_drbg_context ctr_drbg;
        std::unique_ptr<mbedtls_ssl_context> ssl;
        mbedtls_ssl_config conf;
        mbedtls_x509_crt cacert;
        uint32_t flags;
    };
}

#endif

#endif //FRNETLIB_SSLSOCKET_H