[apt.git] / methods / https.cc

//-*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
/* ######################################################################

   HTTPS Acquire Method - This is the HTTPS acquire method for APT.
   
   It uses libcurl

   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include <config.h>

#include <apt-pkg/fileutl.h>
#include <apt-pkg/acquire-method.h>
#include <apt-pkg/error.h>
#include <apt-pkg/hashes.h>
#include <apt-pkg/netrc.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/macros.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/proxy.h>

#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
#include <stdio.h>
#include <iostream>
#include <sstream>
#include <ctype.h>
#include <stdlib.h>

#include "https.h"

#include <apti18n.h>
									/*}}}*/
using namespace std;

bool HttpsMethod::Configuration(std::string Message)
{
   if (pkgAcqMethod::Configuration(Message) == false)
      return false;

   DropPrivsOrDie();

   return true;
}

size_t
HttpsMethod::parse_header(void *buffer, size_t size, size_t nmemb, void *userp)
{
   size_t len = size * nmemb;
   HttpsMethod *me = (HttpsMethod *)userp;
   std::string line((char*) buffer, len);
   for (--len; len > 0; --len)
      if (isspace(line[len]) == 0)
      {
	 ++len;
	 break;
      }
   line.erase(len);

   if (line.empty() == true)
   {
      if (me->Server->Result != 416 && me->Server->StartPos != 0)
	 ;
      else if (me->Server->Result == 416 && me->Server->Size == me->File->FileSize())
      {
         me->Server->Result = 200;
	 me->Server->StartPos = me->Server->Size;
      }
      else
	 me->Server->StartPos = 0;

      me->File->Truncate(me->Server->StartPos);
      me->File->Seek(me->Server->StartPos);
   }
   else if (me->Server->HeaderLine(line) == false)
      return 0;

   return size*nmemb;
}

size_t 
HttpsMethod::write_data(void *buffer, size_t size, size_t nmemb, void *userp)
{
   HttpsMethod *me = (HttpsMethod *)userp;

   if (me->Res.Size == 0)
      me->URIStart(me->Res);
   if(me->File->Write(buffer, size*nmemb) != true)
      return false;

   if(me->Queue->MaximumSize > 0 && me->File->Tell() > me->Queue->MaximumSize)
   {
      me->SetFailReason("MaximumSizeExceeded");
      return _error->Error("Writing more data than expected (%llu > %llu)",
                           me->TotalWritten, me->Queue->MaximumSize);
   }
   return size*nmemb;
}

int
HttpsMethod::progress_callback(void *clientp, double dltotal, double /*dlnow*/,
			      double /*ultotal*/, double /*ulnow*/)
{
   HttpsMethod *me = (HttpsMethod *)clientp;
   if(dltotal > 0 && me->Res.Size == 0) {
      me->Res.Size = (unsigned long long)dltotal;
   }
   return 0;
}

// HttpsServerState::HttpsServerState - Constructor			/*{{{*/
HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * /*Owner*/) : ServerState(Srv, NULL)
{
   TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
   Reset();
}
									/*}}}*/

void HttpsMethod::SetupProxy()  					/*{{{*/
{
   URI ServerName = Queue->Uri;

   // Determine the proxy setting
   AutoDetectProxy(ServerName);

   // Curl should never read proxy settings from the environment, as
   // we determine which proxy to use.  Do this for consistency among
   // methods and prevent an environment variable overriding a
   // no-proxy ("DIRECT") setting in apt.conf.
   curl_easy_setopt(curl, CURLOPT_PROXY, "");

   // Determine the proxy setting - try https first, fallback to http and use env at last
   string UseProxy = _config->Find("Acquire::https::Proxy::" + ServerName.Host,
				   _config->Find("Acquire::http::Proxy::" + ServerName.Host).c_str());

   if (UseProxy.empty() == true)
      UseProxy = _config->Find("Acquire::https::Proxy", _config->Find("Acquire::http::Proxy").c_str());

   // User want to use NO proxy, so nothing to setup
   if (UseProxy == "DIRECT")
      return;

   if (UseProxy.empty() == false) 
   {
      // Parse no_proxy, a comma (,) separated list of domains we don't want to use
      // a proxy for so we stop right here if it is in the list
      if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
	 return;
   } else {
      const char* result = getenv("https_proxy");
      // FIXME: Fall back to http_proxy is to remain compatible with
      // existing setups and behaviour of apt.conf.  This should be
      // deprecated in the future (including apt.conf).  Most other
      // programs do not fall back to http proxy settings and neither
      // should Apt.
      if (result == NULL)
         result = getenv("http_proxy");
      UseProxy = result == NULL ? "" : result;
   }

   // Determine what host and port to use based on the proxy settings
   if (UseProxy.empty() == false) 
   {
      Proxy = UseProxy;
      if (Proxy.Port != 1)
	 curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
      curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
      if (Proxy.User.empty() == false || Proxy.Password.empty() == false)
      {
         curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, Proxy.User.c_str());
         curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, Proxy.Password.c_str());
      }
   }
}									/*}}}*/
// HttpsMethod::Fetch - Fetch an item					/*{{{*/
// ---------------------------------------------------------------------
/* This adds an item to the pipeline. We keep the pipeline at a fixed
   depth. */
bool HttpsMethod::Fetch(FetchItem *Itm)
{
   struct stat SBuf;
   struct curl_slist *headers=NULL;  
   char curl_errorstr[CURL_ERROR_SIZE];
   URI Uri = Itm->Uri;
   string remotehost = Uri.Host;

   // TODO:
   //       - http::Pipeline-Depth
   //       - error checking/reporting
   //       - more debug options? (CURLOPT_DEBUGFUNCTION?)

   curl_easy_reset(curl);
   SetupProxy();

   maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));

   // callbacks
   curl_easy_setopt(curl, CURLOPT_URL, static_cast<string>(Uri).c_str());
   curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_header);
   curl_easy_setopt(curl, CURLOPT_WRITEHEADER, this);
   curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
   curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
   curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
   curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
   // options
   curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
   curl_easy_setopt(curl, CURLOPT_FILETIME, true);
   // only allow curl to handle https, not the other stuff it supports
   curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
   curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);

   // SSL parameters are set by default to the common (non mirror-specific) value
   // if available (or a default one) and gets overload by mirror-specific ones.

   // File containing the list of trusted CA.
   string cainfo = _config->Find("Acquire::https::CaInfo","");
   string knob = "Acquire::https::"+remotehost+"::CaInfo";
   cainfo = _config->Find(knob.c_str(),cainfo.c_str());
   if(cainfo.empty() == false)
      curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());

   // Check server certificate against previous CA list ...
   bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
   knob = "Acquire::https::" + remotehost + "::Verify-Peer";
   peer_verify = _config->FindB(knob.c_str(), peer_verify);
   curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);

   // ... and hostname against cert CN or subjectAltName
   bool verify = _config->FindB("Acquire::https::Verify-Host",true);
   knob = "Acquire::https::"+remotehost+"::Verify-Host";
   verify = _config->FindB(knob.c_str(),verify);
   int const default_verify = (verify == true) ? 2 : 0;
   curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, default_verify);

   // Also enforce issuer of server certificate using its cert
   string issuercert = _config->Find("Acquire::https::IssuerCert","");
   knob = "Acquire::https::"+remotehost+"::IssuerCert";
   issuercert = _config->Find(knob.c_str(),issuercert.c_str());
   if(issuercert.empty() == false)
      curl_easy_setopt(curl, CURLOPT_ISSUERCERT,issuercert.c_str());

   // For client authentication, certificate file ...
   string pem = _config->Find("Acquire::https::SslCert","");
   knob = "Acquire::https::"+remotehost+"::SslCert";
   pem = _config->Find(knob.c_str(),pem.c_str());
   if(pem.empty() == false)
      curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());

   // ... and associated key.
   string key = _config->Find("Acquire::https::SslKey","");
   knob = "Acquire::https::"+remotehost+"::SslKey";
   key = _config->Find(knob.c_str(),key.c_str());
   if(key.empty() == false)
      curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());

   // Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
   // supported by GnuTLS).
   long final_version = CURL_SSLVERSION_DEFAULT;
   string sslversion = _config->Find("Acquire::https::SslForceVersion","");
   knob = "Acquire::https::"+remotehost+"::SslForceVersion";
   sslversion = _config->Find(knob.c_str(),sslversion.c_str());
   if(sslversion == "TLSv1")
     final_version = CURL_SSLVERSION_TLSv1;
   else if(sslversion == "SSLv3")
     final_version = CURL_SSLVERSION_SSLv3;
   curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);

   // CRL file
   string crlfile = _config->Find("Acquire::https::CrlFile","");
   knob = "Acquire::https::"+remotehost+"::CrlFile";
   crlfile = _config->Find(knob.c_str(),crlfile.c_str());
   if(crlfile.empty() == false)
      curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str());

   // cache-control
   if(_config->FindB("Acquire::https::No-Cache",
	_config->FindB("Acquire::http::No-Cache",false)) == false)
   {
      // cache enabled
      if (_config->FindB("Acquire::https::No-Store",
		_config->FindB("Acquire::http::No-Store",false)) == true)
	 headers = curl_slist_append(headers,"Cache-Control: no-store");
      stringstream ss;
      ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::https::Max-Age",
		_config->FindI("Acquire::http::Max-Age",0)));
      headers = curl_slist_append(headers, ss.str().c_str());
   } else {
      // cache disabled by user
      headers = curl_slist_append(headers, "Cache-Control: no-cache");
      headers = curl_slist_append(headers, "Pragma: no-cache");
   }
   curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);

   // speed limit
   int const dlLimit = _config->FindI("Acquire::https::Dl-Limit",
		_config->FindI("Acquire::http::Dl-Limit",0))*1024;
   if (dlLimit > 0)
      curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);

   // set header
   curl_easy_setopt(curl, CURLOPT_USERAGENT,
	_config->Find("Acquire::https::User-Agent",
		_config->Find("Acquire::http::User-Agent",
			"Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());

   // set timeout
   int const timeout = _config->FindI("Acquire::https::Timeout",
		_config->FindI("Acquire::http::Timeout",120));
   curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
   //set really low lowspeed timeout (see #497983)
   curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, DL_MIN_SPEED);
   curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);

   // set redirect options and default to 10 redirects
   bool const AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
	_config->FindB("Acquire::http::AllowRedirect",true));
   curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
   curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);

   // debug
   if(_config->FindB("Debug::Acquire::https", false))
      curl_easy_setopt(curl, CURLOPT_VERBOSE, true);

   // error handling
   curl_errorstr[0] = '\0';
   curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);

   // If we ask for uncompressed files servers might respond with content-
   // negotiation which lets us end up with compressed files we do not support,
   // see 657029, 657560 and co, so if we have no extension on the request
   // ask for text only. As a sidenote: If there is nothing to negotate servers
   // seem to be nice and ignore it.
   if (_config->FindB("Acquire::https::SendAccept", _config->FindB("Acquire::http::SendAccept", true)) == true)
   {
      size_t const filepos = Itm->Uri.find_last_of('/');
      string const file = Itm->Uri.substr(filepos + 1);
      if (flExtension(file) == file)
	 headers = curl_slist_append(headers, "Accept: text/*");
   }

   // if we have the file send an if-range query with a range header
   if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
   {
      std::string Buf;
      strprintf(Buf, "Range: bytes=%lli-", (long long) SBuf.st_size);
      headers = curl_slist_append(headers, Buf.c_str());
      strprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
      headers = curl_slist_append(headers, Buf.c_str());
   }
   else if(Itm->LastModified > 0)
   {
      curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
      curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
   }

   // go for it - if the file exists, append on it
   File = new FileFd(Itm->DestFile, FileFd::WriteAny);
   Server = new HttpsServerState(Itm->Uri, this);

   // keep apt updated
   Res.Filename = Itm->DestFile;

   // get it!
   CURLcode success = curl_easy_perform(curl);

   // If the server returns 200 OK but the If-Modified-Since condition is not
   // met, CURLINFO_CONDITION_UNMET will be set to 1
   long curl_condition_unmet = 0;
   curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &curl_condition_unmet);

   File->Close();
   curl_slist_free_all(headers);

   // cleanup
   if (success != 0)
   {
      _error->Error("%s", curl_errorstr);
      unlink(File->Name().c_str());
      return false;
   }

   // server says file not modified
   if (Server->Result == 304 || curl_condition_unmet == 1)
   {
      unlink(File->Name().c_str());
      Res.IMSHit = true;
      Res.LastModified = Itm->LastModified;
      Res.Size = 0;
      URIDone(Res);
      return true;
   }
   Res.IMSHit = false;

   if (Server->Result != 200 && // OK
	 Server->Result != 206 && // Partial
	 Server->Result != 416) // invalid Range
   {
      char err[255];
      snprintf(err, sizeof(err) - 1, "HttpError%i", Server->Result);
      SetFailReason(err);
      _error->Error("%s", err);
      // unlink, no need keep 401/404 page content in partial/
      unlink(File->Name().c_str());
      return false;
   }

   struct stat resultStat;
   if (unlikely(stat(File->Name().c_str(), &resultStat) != 0))
   {
      _error->Errno("stat", "Unable to access file %s", File->Name().c_str());
      return false;
   }
   Res.Size = resultStat.st_size;

   // invalid range-request
   if (Server->Result == 416)
   {
      unlink(File->Name().c_str());
      Res.Size = 0;
      delete File;
      Redirect(Itm->Uri);
      return true;
   }

   // Timestamp
   curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
   if (Res.LastModified != -1)
   {
      struct timeval times[2];
      times[0].tv_sec = Res.LastModified;
      times[1].tv_sec = Res.LastModified;
      times[0].tv_usec = times[1].tv_usec = 0;
      utimes(File->Name().c_str(), times);
   }
   else
      Res.LastModified = resultStat.st_mtime;

   // take hashes
   Hashes Hash;
   FileFd Fd(Res.Filename, FileFd::ReadOnly);
   Hash.AddFD(Fd);
   Res.TakeHashes(Hash);

   // keep apt updated
   URIDone(Res);

   // cleanup
   Res.Size = 0;
   delete File;

   return true;
}

int main()
{
   setlocale(LC_ALL, "");

   HttpsMethod Mth;
   curl_global_init(CURL_GLOBAL_SSL) ;

   return Mth.Run();
}
Commit	Line	Data
b9e9a44b	1	//-- mode: cpp; mode: fold --
d546f98d MV	2	// Description /{{{/
	3	// $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
	4	/* ######################################################################
	5
1e3f4083	6	HTTPS Acquire Method - This is the HTTPS acquire method for APT.
d546f98d MV	7
	8	It uses libcurl
	9
	10	##################################################################### */
	11	/}}}/
	12	// Include Files /{{{/
ea542140 DK	13	#include <config.h>
ea542140 DK	14
d546f98d MV	15	#include <apt-pkg/fileutl.h>
	16	#include <apt-pkg/acquire-method.h>
	17	#include <apt-pkg/error.h>
	18	#include <apt-pkg/hashes.h>
592b7800	19	#include <apt-pkg/netrc.h>
472ff00e	20	#include <apt-pkg/configuration.h>
453b82a3 DK	21	#include <apt-pkg/macros.h>
453b82a3 DK	22	#include <apt-pkg/strutl.h>
c6ee61ea	23	#include <apt-pkg/proxy.h>
d546f98d MV	24
	25	#include <sys/stat.h>
	26	#include <sys/time.h>
d546f98d	27	#include <unistd.h>
d546f98d	28	#include <stdio.h>
d546f98d	29	#include <iostream>
d546f98d	30	#include <sstream>
453b82a3 DK	31	#include <ctype.h>
453b82a3 DK	32	#include <stdlib.h>
d546f98d	33
d546f98d	34	#include "https.h"
453b82a3	35
ea542140	36	#include <apti18n.h>
d546f98d MV	37	/}}}/
	38	using namespace std;
	39
9983999d MV	40	bool HttpsMethod::Configuration(std::string Message)
	41	{
	42	if (pkgAcqMethod::Configuration(Message) == false)
	43	return false;
	44
	45	DropPrivsOrDie();
	46
	47	return true;
	48	}
	49
fd46d305 DK	50	size_t
	51	HttpsMethod::parse_header(void buffer, size_t size, size_t nmemb, void userp)
	52	{
	53	size_t len = size * nmemb;
	54	HttpsMethod me = (HttpsMethod )userp;
	55	std::string line((char*) buffer, len);
	56	for (--len; len > 0; --len)
	57	if (isspace(line[len]) == 0)
	58	{
	59	++len;
	60	break;
	61	}
	62	line.erase(len);
	63
	64	if (line.empty() == true)
	65	{
	66	if (me->Server->Result != 416 && me->Server->StartPos != 0)
	67	;
	68	else if (me->Server->Result == 416 && me->Server->Size == me->File->FileSize())
	69	{
	70	me->Server->Result = 200;
	71	me->Server->StartPos = me->Server->Size;
	72	}
	73	else
	74	me->Server->StartPos = 0;
	75
	76	me->File->Truncate(me->Server->StartPos);
	77	me->File->Seek(me->Server->StartPos);
	78	}
	79	else if (me->Server->HeaderLine(line) == false)
	80	return 0;
	81
	82	return size*nmemb;
	83	}
	84
d546f98d MV	85	size_t
	86	HttpsMethod::write_data(void buffer, size_t size, size_t nmemb, void userp)
	87	{
	88	HttpsMethod me = (HttpsMethod )userp;
	89
f9b4f12d DK	90	if (me->Res.Size == 0)
f9b4f12d DK	91	me->URIStart(me->Res);
d546f98d MV	92	if(me->File->Write(buffer, size*nmemb) != true)
	93	return false;
	94
c48eea97	95	if(me->Queue->MaximumSize > 0 && me->File->Tell() > me->Queue->MaximumSize)
ee279506 MV	96	{
ee279506 MV	97	me->SetFailReason("MaximumSizeExceeded");
ffd2dd93	98	return _error->Error("Writing more data than expected (%llu > %llu)",
c48eea97	99	me->TotalWritten, me->Queue->MaximumSize);
ee279506	100	}
d546f98d MV	101	return size*nmemb;
	102	}
	103
65512241 DK	104	int
	105	HttpsMethod::progress_callback(void clientp, double dltotal, double /dlnow*/,
	106	double /ultotal/, double /ulnow/)
d546f98d MV	107	{
	108	HttpsMethod me = (HttpsMethod )clientp;
	109	if(dltotal > 0 && me->Res.Size == 0) {
650faab0	110	me->Res.Size = (unsigned long long)dltotal;
d546f98d MV	111	}
	112	return 0;
	113	}
	114
fd46d305	115	// HttpsServerState::HttpsServerState - Constructor /{{{/
65512241	116	HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * /Owner/) : ServerState(Srv, NULL)
fd46d305 DK	117	{
	118	TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
	119	Reset();
	120	}
	121	/}}}/
	122
4407a02f	123	void HttpsMethod::SetupProxy() /{{{/
d546f98d MV	124	{
	125	URI ServerName = Queue->Uri;
	126
c6ee61ea MV	127	// Determine the proxy setting
	128	AutoDetectProxy(ServerName);
	129
5b63d2a9 MV	130	// Curl should never read proxy settings from the environment, as
	131	// we determine which proxy to use. Do this for consistency among
	132	// methods and prevent an environment variable overriding a
	133	// no-proxy ("DIRECT") setting in apt.conf.
	134	curl_easy_setopt(curl, CURLOPT_PROXY, "");
	135
4407a02f MV	136	// Determine the proxy setting - try https first, fallback to http and use env at last
	137	string UseProxy = _config->Find("Acquire::https::Proxy::" + ServerName.Host,
	138	_config->Find("Acquire::http::Proxy::" + ServerName.Host).c_str());
	139
	140	if (UseProxy.empty() == true)
	141	UseProxy = _config->Find("Acquire::https::Proxy", _config->Find("Acquire::http::Proxy").c_str());
	142
	143	// User want to use NO proxy, so nothing to setup
	144	if (UseProxy == "DIRECT")
	145	return;
	146
	147	if (UseProxy.empty() == false)
d546f98d	148	{
4407a02f MV	149	// Parse no_proxy, a comma (,) separated list of domains we don't want to use
	150	// a proxy for so we stop right here if it is in the list
	151	if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
	152	return;
	153	} else {
5b63d2a9 MV	154	const char* result = getenv("https_proxy");
	155	// FIXME: Fall back to http_proxy is to remain compatible with
	156	// existing setups and behaviour of apt.conf. This should be
	157	// deprecated in the future (including apt.conf). Most other
	158	// programs do not fall back to http proxy settings and neither
	159	// should Apt.
	160	if (result == NULL)
	161	result = getenv("http_proxy");
4407a02f	162	UseProxy = result == NULL ? "" : result;
d546f98d	163	}
4407a02f	164
d546f98d	165	// Determine what host and port to use based on the proxy settings
4407a02f	166	if (UseProxy.empty() == false)
d546f98d	167	{
4407a02f MV	168	Proxy = UseProxy;
4407a02f MV	169	if (Proxy.Port != 1)
d546f98d MV	170	curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
d546f98d MV	171	curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
5b63d2a9 MV	172	if (Proxy.User.empty() == false \|\| Proxy.Password.empty() == false)
	173	{
	174	curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, Proxy.User.c_str());
	175	curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, Proxy.Password.c_str());
	176	}
d546f98d	177	}
b9e9a44b	178	} /}}}/
d546f98d MV	179	// HttpsMethod::Fetch - Fetch an item /{{{/
	180	// ---------------------------------------------------------------------
	181	/* This adds an item to the pipeline. We keep the pipeline at a fixed
	182	depth. */
	183	bool HttpsMethod::Fetch(FetchItem *Itm)
	184	{
d546f98d MV	185	struct stat SBuf;
d546f98d MV	186	struct curl_slist *headers=NULL;
714ee06c	187	char curl_errorstr[CURL_ERROR_SIZE];
c769cd6f MV	188	URI Uri = Itm->Uri;
c769cd6f MV	189	string remotehost = Uri.Host;
d546f98d MV	190
d546f98d MV	191	// TODO:
d546f98d MV	192	// - http::Pipeline-Depth
	193	// - error checking/reporting
	194	// - more debug options? (CURLOPT_DEBUGFUNCTION?)
	195
5820530d	196	curl_easy_reset(curl);
d546f98d MV	197	SetupProxy();
d546f98d MV	198
1de1f703	199	maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
592b7800	200
d546f98d	201	// callbacks
01fc8930	202	curl_easy_setopt(curl, CURLOPT_URL, static_cast<string>(Uri).c_str());
fd46d305 DK	203	curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_header);
fd46d305 DK	204	curl_easy_setopt(curl, CURLOPT_WRITEHEADER, this);
d546f98d MV	205	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
	206	curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
	207	curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
	208	curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
dc95fee1	209	// options
d546f98d	210	curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
5820530d	211	curl_easy_setopt(curl, CURLOPT_FILETIME, true);
889b0072 DK	212	// only allow curl to handle https, not the other stuff it supports
889b0072 DK	213	curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
dc95fee1	214	curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
d546f98d	215
c769cd6f MV	216	// SSL parameters are set by default to the common (non mirror-specific) value
	217	// if available (or a default one) and gets overload by mirror-specific ones.
	218
	219	// File containing the list of trusted CA.
	220	string cainfo = _config->Find("Acquire::https::CaInfo","");
	221	string knob = "Acquire::https::"+remotehost+"::CaInfo";
	222	cainfo = _config->Find(knob.c_str(),cainfo.c_str());
46e39c8e	223	if(cainfo.empty() == false)
c769cd6f MV	224	curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());
	225
	226	// Check server certificate against previous CA list ...
	227	bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
	228	knob = "Acquire::https::" + remotehost + "::Verify-Peer";
	229	peer_verify = _config->FindB(knob.c_str(), peer_verify);
714ee06c MV	230	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
714ee06c MV	231
c769cd6f	232	// ... and hostname against cert CN or subjectAltName
c769cd6f MV	233	bool verify = _config->FindB("Acquire::https::Verify-Host",true);
	234	knob = "Acquire::https::"+remotehost+"::Verify-Host";
	235	verify = _config->FindB(knob.c_str(),verify);
52b22cea DK	236	int const default_verify = (verify == true) ? 2 : 0;
52b22cea DK	237	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, default_verify);
c769cd6f	238
46e39c8e MV	239	// Also enforce issuer of server certificate using its cert
	240	string issuercert = _config->Find("Acquire::https::IssuerCert","");
	241	knob = "Acquire::https::"+remotehost+"::IssuerCert";
	242	issuercert = _config->Find(knob.c_str(),issuercert.c_str());
	243	if(issuercert.empty() == false)
	244	curl_easy_setopt(curl, CURLOPT_ISSUERCERT,issuercert.c_str());
	245
c769cd6f	246	// For client authentication, certificate file ...
714ee06c	247	string pem = _config->Find("Acquire::https::SslCert","");
c769cd6f MV	248	knob = "Acquire::https::"+remotehost+"::SslCert";
c769cd6f MV	249	pem = _config->Find(knob.c_str(),pem.c_str());
46e39c8e	250	if(pem.empty() == false)
714ee06c	251	curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
c769cd6f MV	252
	253	// ... and associated key.
	254	string key = _config->Find("Acquire::https::SslKey","");
	255	knob = "Acquire::https::"+remotehost+"::SslKey";
	256	key = _config->Find(knob.c_str(),key.c_str());
46e39c8e	257	if(key.empty() == false)
c769cd6f MV	258	curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());
	259
	260	// Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
	261	// supported by GnuTLS).
	262	long final_version = CURL_SSLVERSION_DEFAULT;
	263	string sslversion = _config->Find("Acquire::https::SslForceVersion","");
	264	knob = "Acquire::https::"+remotehost+"::SslForceVersion";
	265	sslversion = _config->Find(knob.c_str(),sslversion.c_str());
	266	if(sslversion == "TLSv1")
	267	final_version = CURL_SSLVERSION_TLSv1;
	268	else if(sslversion == "SSLv3")
	269	final_version = CURL_SSLVERSION_SSLv3;
	270	curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);
d546f98d	271
46e39c8e MV	272	// CRL file
	273	string crlfile = _config->Find("Acquire::https::CrlFile","");
	274	knob = "Acquire::https::"+remotehost+"::CrlFile";
	275	crlfile = _config->Find(knob.c_str(),crlfile.c_str());
	276	if(crlfile.empty() == false)
	277	curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str());
	278
d546f98d	279	// cache-control
b9e9a44b DK	280	if(_config->FindB("Acquire::https::No-Cache",
b9e9a44b DK	281	_config->FindB("Acquire::http::No-Cache",false)) == false)
d546f98d MV	282	{
d546f98d MV	283	// cache enabled
b9e9a44b DK	284	if (_config->FindB("Acquire::https::No-Store",
b9e9a44b DK	285	_config->FindB("Acquire::http::No-Store",false)) == true)
d546f98d	286	headers = curl_slist_append(headers,"Cache-Control: no-store");
8654fae9	287	stringstream ss;
b9e9a44b DK	288	ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::https::Max-Age",
b9e9a44b DK	289	_config->FindI("Acquire::http::Max-Age",0)));
d546f98d MV	290	headers = curl_slist_append(headers, ss.str().c_str());
	291	} else {
	292	// cache disabled by user
	293	headers = curl_slist_append(headers, "Cache-Control: no-cache");
	294	headers = curl_slist_append(headers, "Pragma: no-cache");
	295	}
	296	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
	297
d546f98d	298	// speed limit
46e39c8e	299	int const dlLimit = _config->FindI("Acquire::https::Dl-Limit",
b9e9a44b	300	_config->FindI("Acquire::http::Dl-Limit",0))*1024;
d546f98d MV	301	if (dlLimit > 0)
	302	curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
	303
	304	// set header
9f542bae DK	305	curl_easy_setopt(curl, CURLOPT_USERAGENT,
	306	_config->Find("Acquire::https::User-Agent",
	307	_config->Find("Acquire::http::User-Agent",
335e2c82	308	"Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());
d546f98d	309
cc615257	310	// set timeout
46e39c8e	311	int const timeout = _config->FindI("Acquire::https::Timeout",
b9e9a44b	312	_config->FindI("Acquire::http::Timeout",120));
cc615257	313	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
43cf55db	314	//set really low lowspeed timeout (see #497983)
5085e660	315	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, DL_MIN_SPEED);
43cf55db	316	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);
cc615257	317
668ce84d	318	// set redirect options and default to 10 redirects
46e39c8e	319	bool const AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
b9e9a44b	320	_config->FindB("Acquire::http::AllowRedirect",true));
668ce84d MV	321	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
	322	curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);
	323
d546f98d	324	// debug
714ee06c	325	if(_config->FindB("Debug::Acquire::https", false))
d546f98d MV	326	curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
d546f98d MV	327
714ee06c	328	// error handling
cc418115	329	curl_errorstr[0] = '\0';
714ee06c MV	330	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
714ee06c MV	331
6f4501f9	332	// If we ask for uncompressed files servers might respond with content-
1e3f4083	333	// negotiation which lets us end up with compressed files we do not support,
6f4501f9 DK	334	// see 657029, 657560 and co, so if we have no extension on the request
	335	// ask for text only. As a sidenote: If there is nothing to negotate servers
	336	// seem to be nice and ignore it.
	337	if (_config->FindB("Acquire::https::SendAccept", _config->FindB("Acquire::http::SendAccept", true)) == true)
	338	{
	339	size_t const filepos = Itm->Uri.find_last_of('/');
	340	string const file = Itm->Uri.substr(filepos + 1);
	341	if (flExtension(file) == file)
	342	headers = curl_slist_append(headers, "Accept: text/*");
	343	}
	344
d6039f9e	345	// if we have the file send an if-range query with a range header
4c499611 MV	346	if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
4c499611 MV	347	{
062074cb DK	348	std::string Buf;
	349	strprintf(Buf, "Range: bytes=%lli-", (long long) SBuf.st_size);
	350	headers = curl_slist_append(headers, Buf.c_str());
	351	strprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
	352	headers = curl_slist_append(headers, Buf.c_str());
8654fae9	353	}
d6039f9e MV	354	else if(Itm->LastModified > 0)
	355	{
	356	curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
	357	curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
4c499611	358	}
d546f98d MV	359
	360	// go for it - if the file exists, append on it
	361	File = new FileFd(Itm->DestFile, FileFd::WriteAny);
fd46d305	362	Server = new HttpsServerState(Itm->Uri, this);
85050e76	363
d546f98d MV	364	// keep apt updated
	365	Res.Filename = Itm->DestFile;
	366
	367	// get it!
	368	CURLcode success = curl_easy_perform(curl);
d546f98d	369
1dea08eb MV	370	// If the server returns 200 OK but the If-Modified-Since condition is not
	371	// met, CURLINFO_CONDITION_UNMET will be set to 1
	372	long curl_condition_unmet = 0;
	373	curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &curl_condition_unmet);
	374
db1f1469	375	File->Close();
85050e76	376	curl_slist_free_all(headers);
db1f1469	377
d546f98d	378	// cleanup
85050e76	379	if (success != 0)
4c499611	380	{
9b5d79ec	381	_error->Error("%s", curl_errorstr);
db1f1469	382	unlink(File->Name().c_str());
85050e76 DK	383	return false;
	384	}
	385
	386	// server says file not modified
fd46d305	387	if (Server->Result == 304 \|\| curl_condition_unmet == 1)
85050e76 DK	388	{
	389	unlink(File->Name().c_str());
	390	Res.IMSHit = true;
	391	Res.LastModified = Itm->LastModified;
	392	Res.Size = 0;
	393	URIDone(Res);
d546f98d MV	394	return true;
d546f98d MV	395	}
fd46d305	396	Res.IMSHit = false;
d546f98d	397
fd46d305 DK	398	if (Server->Result != 200 && // OK
	399	Server->Result != 206 && // Partial
	400	Server->Result != 416) // invalid Range
85050e76 DK	401	{
85050e76 DK	402	char err[255];
fd46d305	403	snprintf(err, sizeof(err) - 1, "HttpError%i", Server->Result);
85050e76 DK	404	SetFailReason(err);
	405	_error->Error("%s", err);
	406	// unlink, no need keep 401/404 page content in partial/
	407	unlink(File->Name().c_str());
	408	return false;
	409	}
	410
	411	struct stat resultStat;
	412	if (unlikely(stat(File->Name().c_str(), &resultStat) != 0))
	413	{
	414	_error->Errno("stat", "Unable to access file %s", File->Name().c_str());
	415	return false;
	416	}
	417	Res.Size = resultStat.st_size;
	418
	419	// invalid range-request
fd46d305	420	if (Server->Result == 416)
85050e76 DK	421	{
	422	unlink(File->Name().c_str());
	423	Res.Size = 0;
	424	delete File;
	425	Redirect(Itm->Uri);
	426	return true;
5820530d OS	427	}
5820530d OS	428
85050e76 DK	429	// Timestamp
	430	curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
	431	if (Res.LastModified != -1)
	432	{
246bbb61	433	struct timeval times[2];
9ce3cfc9 DK	434	times[0].tv_sec = Res.LastModified;
9ce3cfc9 DK	435	times[1].tv_sec = Res.LastModified;
246bbb61 DK	436	times[0].tv_usec = times[1].tv_usec = 0;
246bbb61 DK	437	utimes(File->Name().c_str(), times);
85050e76 DK	438	}
	439	else
	440	Res.LastModified = resultStat.st_mtime;
d546f98d MV	441
	442	// take hashes
	443	Hashes Hash;
	444	FileFd Fd(Res.Filename, FileFd::ReadOnly);
109eb151	445	Hash.AddFD(Fd);
d546f98d	446	Res.TakeHashes(Hash);
85050e76	447
d546f98d MV	448	// keep apt updated
	449	URIDone(Res);
	450
	451	// cleanup
d546f98d MV	452	Res.Size = 0;
d546f98d MV	453	delete File;
d546f98d MV	454
d546f98d MV	455	return true;
d3e8fbb3	456	}
d546f98d MV	457
	458	int main()
	459	{
	460	setlocale(LC_ALL, "");
	461
	462	HttpsMethod Mth;
	463	curl_global_init(CURL_GLOBAL_SSL) ;
	464
	465	return Mth.Run();
	466	}
	467