284 lines
8.4 KiB
C++
284 lines
8.4 KiB
C++
// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "stdpch.h"
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#include "http_client_curl.h"
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#include <curl/curl.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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using namespace NLMISC;
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using namespace NLNET;
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using namespace std;
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#define _Curl (CURL *)_CurlStruct
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// Ugly CURL callback
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size_t CCurlHttpClient::writeDataFromCurl(void *buffer, size_t size, size_t nmemb, void *pHttpClient)
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{
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CCurlHttpClient * httpClient = static_cast<CCurlHttpClient*>(pHttpClient);
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httpClient->pushReceivedData((uint8*)buffer, (uint)(size*nmemb));
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return size*nmemb;
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}
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// ***************************************************************************
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bool CCurlHttpClient::connect(const std::string &/* server */)
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{
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curl_version_info_data *vdata = curl_version_info(CURLVERSION_NOW);
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nldebug("Libcurl v%s", vdata->version);
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if ((vdata->features & CURL_VERSION_SSL) == 0)
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nlwarning("SSL not supported");
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curl_global_init(CURL_GLOBAL_ALL);
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_CurlStruct = curl_easy_init();
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if(_Curl == NULL)
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return false;
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return true;
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}
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// ***************************************************************************
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bool CCurlHttpClient::authenticate(const std::string &user, const std::string &password)
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{
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_Auth = user + ":" + password;
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return true;
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}
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const char *CAFilename = "ssl_ca_cert.pem"; // this is the certificate "Thawte Server CA"
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// ***************************************************************************
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static CURLcode sslctx_function(CURL * /* curl */, void *sslctx, void * /* parm */)
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{
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// look for certificate in search paths
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string path = CPath::lookup(CAFilename);
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nlinfo("Cert path '%s'", path.c_str());
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if (path.empty())
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{
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nlwarning("Unable to find %s", CAFilename);
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return CURLE_SSL_CACERT;
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}
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CIFile file;
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// open certificate
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if (!file.open(path))
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{
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nlwarning("Unable to open %s", path.c_str());
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return CURLE_SSL_CACERT;
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}
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CURLcode res = CURLE_OK;
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// load certificate content into memory
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std::vector<uint8> buffer(file.getFileSize());
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file.serialBuffer(&buffer[0], file.getFileSize());
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// get a BIO
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BIO *bio = BIO_new_mem_buf(&buffer[0], file.getFileSize());
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char errorBuffer[1024];
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if (bio)
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{
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// get a pointer to the X509 certificate store (which may be empty!)
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X509_STORE *store = SSL_CTX_get_cert_store((SSL_CTX *)sslctx);
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// use it to read the PEM formatted certificate from memory into an X509
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// structure that SSL can use
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STACK_OF(X509_INFO) *info = PEM_X509_INFO_read_bio(bio, NULL, NULL, NULL);
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if (info)
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{
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// iterate over all entries from the PEM file, add them to the x509_store one by one
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for (sint i = 0; i < sk_X509_INFO_num(info); ++i)
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{
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X509_INFO *itmp = sk_X509_INFO_value(info, i);
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if (itmp && itmp->x509)
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{
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// add our certificate to this store
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if (X509_STORE_add_cert(store, itmp->x509) == 0)
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{
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uint errCode = ERR_get_error();
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// ignore already in hash table errors
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if (ERR_GET_LIB(errCode) != ERR_LIB_X509 || ERR_GET_REASON(errCode) != X509_R_CERT_ALREADY_IN_HASH_TABLE)
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{
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ERR_error_string_n(errCode, errorBuffer, 1024);
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nlwarning("Error adding certificate %s: %s", itmp->x509->name, errorBuffer);
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res = CURLE_SSL_CACERT;
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}
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}
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else
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{
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nlinfo("Added certificate %s", itmp->x509->name);
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}
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}
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}
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// cleanup
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sk_X509_INFO_pop_free(info, X509_INFO_free);
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}
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else
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{
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nlwarning("Unable to read PEM info");
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res = CURLE_SSL_CACERT;
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}
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// decrease reference counts
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BIO_free(bio);
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}
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else
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{
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nlwarning("Unable to allocate BIO buffer for certificates");
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res = CURLE_SSL_CACERT;
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}
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// all set to go
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return res;
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}
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// ***************************************************************************
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bool CCurlHttpClient::verifyServer(bool verify)
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{
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curl_easy_setopt(_Curl, CURLOPT_SSL_VERIFYHOST, verify ? 2 : 0);
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curl_easy_setopt(_Curl, CURLOPT_SSL_VERIFYPEER, verify ? 1 : 0);
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curl_easy_setopt(_Curl, CURLOPT_SSLCERTTYPE, "PEM");
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// would allow to provide the CA in memory instead of using CURLOPT_CAINFO, but needs to include and link OpenSSL
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if (curl_easy_setopt(_Curl, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function) != CURLE_OK)
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{
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nlwarning("Unable to support CURLOPT_SSL_CTX_FUNCTION, curl not compiled with OpenSSL ?");
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}
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// don't use that anymore, because CA can't be loaded from BNP and doesn't support UTF-8 under Windows
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// curl_easy_setopt(_Curl, CURLOPT_CAINFO, path.c_str());
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curl_easy_setopt(_Curl, CURLOPT_CAPATH, NULL);
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return true;
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}
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// ***************************************************************************
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bool CCurlHttpClient::sendRequest(const std::string& methodWB, const std::string &url, const std::string &cookieName, const std::string &cookieValue, const std::string& postParams, bool verbose)
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{
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if (verbose)
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curl_easy_setopt(_Curl, CURLOPT_VERBOSE, 1);
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// Set URL
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curl_easy_setopt(_Curl, CURLOPT_URL, url.c_str());
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// Authentication
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if (!_Auth.empty())
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{
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curl_easy_setopt(_Curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC); // TODO: CURLAUTH_ANY
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curl_easy_setopt(_Curl, CURLOPT_USERPWD, _Auth.c_str());
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}
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// Set POST params
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if ((methodWB == "POST") && (!postParams.empty()))
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{
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curl_easy_setopt(_Curl, CURLOPT_POSTFIELDS, postParams.c_str());
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}
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// Cookie
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if (!cookieName.empty())
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curl_easy_setopt(_Curl, CURLOPT_COOKIE, string(cookieName+"="+cookieValue).c_str());
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// Include the header in the response
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curl_easy_setopt(_Curl, CURLOPT_HEADER, 1);
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// Register the receive callback
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curl_easy_setopt(_Curl, CURLOPT_WRITEFUNCTION, CCurlHttpClient::writeDataFromCurl);
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curl_easy_setopt(_Curl, CURLOPT_WRITEDATA, this);
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char errorbuf [CURL_ERROR_SIZE+1];
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curl_easy_setopt(_Curl, CURLOPT_ERRORBUFFER, errorbuf);
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// Send
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CURLcode res = curl_easy_perform(_Curl);
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if (res != 0)
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{
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if (verbose)
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nlwarning(errorbuf);
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return false;
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}
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// Get result
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long r;
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curl_easy_getinfo(_Curl, CURLINFO_RESPONSE_CODE, &r);
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if (verbose)
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{
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nldebug("%u", (uint)r);
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}
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return true;
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}
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void CCurlHttpClient::pushReceivedData(uint8 *buffer, uint size)
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{
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_ReceiveBuffer.insert(_ReceiveBuffer.end(), buffer, buffer+size);
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}
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// ***************************************************************************
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bool CCurlHttpClient::sendGet(const string &url, const string& params, bool verbose)
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{
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return sendRequest("GET", url + (params.empty() ? "" : ("?" + params)), string(), string(), string(), verbose);
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}
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// ***************************************************************************
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bool CCurlHttpClient::sendGetWithCookie(const string &url, const string &name, const string &value, const string& params, bool verbose)
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{
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return sendRequest("GET", url + (params.empty() ? "" : ("?" + params)), name, value, string(), verbose);
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}
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// ***************************************************************************
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bool CCurlHttpClient::sendPost(const string &url, const string& params, bool verbose)
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{
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return sendRequest("POST", url, string(), string(), params, verbose);
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}
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// ***************************************************************************
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bool CCurlHttpClient::sendPostWithCookie(const string &url, const string &name, const string &value, const string& params, bool verbose)
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{
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return sendRequest("POST", url, name, value, params, verbose);
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}
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// ***************************************************************************
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bool CCurlHttpClient::receive(string &res, bool verbose)
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{
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if (verbose)
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{
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nldebug("Receiving %u bytes", (uint)_ReceiveBuffer.size());
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}
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res.clear();
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if (!_ReceiveBuffer.empty())
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res.assign((const char*)&(*(_ReceiveBuffer.begin())), _ReceiveBuffer.size());
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_ReceiveBuffer.clear();
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return true;
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}
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// ***************************************************************************
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void CCurlHttpClient::disconnect()
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{
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curl_easy_cleanup(_Curl);
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curl_global_cleanup();
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}
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CCurlHttpClient CurlHttpClient;
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