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Curl.h

/*
 *  Phusion Passenger - https://www.phusionpassenger.com/
 *  Copyright (c) 2013-2018 Phusion Holding B.V.
 *
 *  "Passenger", "Phusion Passenger" and "Union Station" are registered
 *  trademarks of Phusion Holding B.V.
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *  THE SOFTWARE.
 */
#ifndef _PASSENGER_UTILS_CURL_H_
#define _PASSENGER_UTILS_CURL_H_

/**
 * Utilities for setting libcurl proxy information. Proxy information is contained
 * in a user-supplied string in the form of:
 *
 *     protocol://[username:password@]host[:port][?option1,option2]
 *
 * The address may also be `none`, which indicates that proxy usage should be
 * explicitly disabled even when environment variables such as "http_proxy" etc
 * are set.
 *
 * You are supposed to prepare a CurlProxyInfo object with prepareCurlProxy().
 * Keep this object alive as long as you're using the CURL handle.
 * Then, call setCurlProxy() to set the proxy information on the CURL handle.
 *
 * prepareCurlProxy() throws ArgumentException upon encountering an invalid
 * proxy address.
 *
 * If the address is an empty string, prepareCurlProxy() and setCurlProxy()
 * don't do anything.
 */

// for std::swap()
#if __cplusplus >= 201103L
	#include <utility>
#else
	#include <algorithm>
#endif
#include <string>
#include <cstring>
#include <curl/curl.h>
#include <boost/config.hpp>
#include <boost/foreach.hpp>
#include <Exceptions.h>
#include <FileTools/FileManip.h>
#include <Utils.h>
#include <StrIntTools/StrIntUtils.h>

namespace Passenger {

using namespace std;
using namespace boost;

#ifndef CURLINFO_RESPONSE_CODE
	#define CURLINFO_RESPONSE_CODE CURLINFO_HTTP_CODE
#endif

struct CurlProxyInfo {
	string hostAndPort;
	string credentials;
	long type;
	bool none;
	bool httpTunnel;
	bool valid; // false if an error occurred during address parsing

CurlProxyInfo(bool valid = false)
		: type(0),
		  none(false),
		  httpTunnel(false),
		  valid(valid)
		{ }

void swap(CurlProxyInfo &other) BOOST_NOEXCEPT_OR_NOTHROW {
		hostAndPort.swap(other.hostAndPort);
		credentials.swap(other.credentials);
		std::swap(type, other.type);
		std::swap(none, other.none);
		std::swap(httpTunnel, other.httpTunnel);
		std::swap(valid, other.valid);
	}
};

inline const CurlProxyInfo
prepareCurlProxy(const string &address) {
	if (address.empty()) {
		return CurlProxyInfo(true);
	} else if (address == "none") {
		CurlProxyInfo result;
		result.none = true;
		result.valid = true;
		return result;
	} else {
		CurlProxyInfo result;
		size_t protocolLen;
		vector<string> options;
		string::size_type pos;

if (startsWith(address, "http://")) {
			protocolLen = strlen("http://");
			result.type = CURLPROXY_HTTP;
		} else if (startsWith(address, "socks5://")) {
			protocolLen = strlen("socks5://");
			result.type = CURLPROXY_SOCKS5;
		} else if (startsWith(address, "socks4://")) {
			protocolLen = strlen("socks4://");
			#if LIBCURL_VERSION_NUM >= 0x070A00
				result.type = CURLPROXY_SOCKS4;
			#else
				throw ArgumentException("Socks4 proxies are not supported because "
					"libcurl doesn't support it. Please upgrade libcurl to version "
					"7.10 or higher.");
			#endif
		} else if (startsWith(address, "socks4a://")) {
			protocolLen = strlen("socks4a://");
			#if LIBCURL_VERSION_NUM >= 0x071200
				result.type = CURLPROXY_SOCKS4A;
			#else
				throw ArgumentException("Socks4A proxies are not supported because "
					"libcurl doesn't support it. Please upgrade libcurl to version "
					"7.18.0 or higher.");
			#endif
		} else if (startsWith(address, "socks5h://")) {
			protocolLen = strlen("socks5h://");
			#if LIBCURL_VERSION_NUM >= 0x071200
				result.type = CURLPROXY_SOCKS5_HOSTNAME;
			#else
				throw ArgumentException("Socks5 proxies (with proxy DNS resolving) are "
					"not supported because libcurl doesn't support it. Please upgrade "
					"libcurl to version 7.18.0 or higher.");
			#endif
		} else if (address.find("://") == string::npos) {
			throw ArgumentException("Invalid proxy address: no protocol specified.");
		} else {
			throw ArgumentException("Only 'http' and 'socks5' proxies are supported.");
		}

result.hostAndPort = address.substr(protocolLen);

// Extract options.
		pos = result.hostAndPort.find("?");
		if (pos != string::npos) {
			string optionsString = result.hostAndPort.substr(pos + 1);
			result.hostAndPort.erase(pos);
			split(optionsString, ',', options);
		}

// Extract authentication credentials.
		pos = result.hostAndPort.find("@");
		if (pos != string::npos) {
			result.credentials = result.hostAndPort.substr(0, pos);
			result.hostAndPort.erase(0, pos + 1);
		}

if (result.hostAndPort.empty()) {
			throw ArgumentException("No proxy host name given.");
		}

foreach (const string option, options) {
			if (option == "tunnel") {
				if (result.type == CURLPROXY_HTTP) {
					result.httpTunnel = true;
				} else {
					throw ArgumentException("The 'tunnel' option is only supported for HTTP proxies.");
				}
			} else {
				throw ArgumentException("Invalid proxy address option '" + option + "'.");
			}
		}

result.valid = true;
		return result;
	}
}

inline CURLcode
setCurlProxy(CURL *curl, const CurlProxyInfo &proxyInfo) {
	if (proxyInfo.hostAndPort.empty()) {
		return CURLE_OK;
	} else if (proxyInfo.none) {
		return curl_easy_setopt(curl, CURLOPT_PROXY, "");
	} else {
		CURLcode code;
		if (CURLE_OK != (code = curl_easy_setopt(curl, CURLOPT_PROXY, proxyInfo.hostAndPort.c_str()))) {
			return code;
		}
		if (CURLE_OK != (code = curl_easy_setopt(curl, CURLOPT_PROXYTYPE, proxyInfo.type))) {
			return code;
		}
		if (CURLE_OK != (code = curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, proxyInfo.credentials.c_str()))) {
			return code;
		}
		if (proxyInfo.httpTunnel) {
			if (CURLE_OK != (code = curl_easy_setopt(curl, CURLOPT_HTTPPROXYTUNNEL, 1))) {
				return code;
			}
		}
		return CURLE_OK;
	}
}

inline bool
isCurlStaticallyLinked() {
	#ifdef CURL_IS_STATICALLY_LINKED
		return true;
	#else
		return false;
	#endif
}

inline CURLcode
setCurlDefaultCaInfo(CURL *curl) {
	#ifdef CURL_IS_STATICALLY_LINKED
		static const char *candidates[] = {
			// Debian, Ubuntu
			"/etc/ssl/certs/ca-certificates.crt",
			// Red Hat, CentOS, Fedora
			"/etc/pki/tls/certs/ca-bundle.crt",
			// Older Red Hat
			"/usr/share/ssl/certs/ca-bundle.crt",
			// FreeBSD
			"/usr/local/share/certs/ca-root-nss.crt",
			// OpenBSD, FreeBSD (symlink), macOS
			"/etc/ssl/cert.pem",
			// SUSE
			"/etc/ssl/certs"
		};
		unsigned int i;

for (i = 0; i < sizeof(candidates) / sizeof(const char *); i++) {
			switch (getFileType(candidates[i])) {
			case FT_REGULAR:
				return curl_easy_setopt(curl, CURLOPT_CAINFO, candidates[i]);
			case FT_DIRECTORY:
				return curl_easy_setopt(curl, CURLOPT_CAPATH, candidates[i]);
			default:
				break;
			}
		}

return CURLE_SSL_CACERT_BADFILE;
	#else
		return CURLE_OK;
	#endif
}

} // namespace Passenger

#endif /* _PASSENGER_UTILS_CURL_H_ */

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..	dir	-	root/root	drwxr-xr-x	2024-08-23 05:00:47
AnsiColorConstants.h	text/x-c	1.75 KB	root/root	-rw-r--r--	2024-07-24 02:38:58
AsyncSignalSafeUtils.h	text/x-c++	5.42 KB	root/root	-rw-r--r--	2024-07-24 02:38:58
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ClassUtils.h	text/x-c++	2.35 KB	root/root	-rw-r--r--	2024-07-24 02:38:58
Curl.h	text/x-c++	7.78 KB	root/root	-rw-r--r--	2024-07-24 02:38:58
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HttpConstants.h	text/x-c++	4.48 KB	root/root	-rw-r--r--	2024-07-24 02:38:58
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Lock.h	text/x-c++	630 B	root/root	-rw-r--r--	2024-07-24 02:38:58
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OptionParsing.h	text/x-c++	2.26 KB	root/root	-rw-r--r--	2024-07-24 02:38:58
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