[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;

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) ;

   Mth.DropPrivsOrDie();

   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
fd46d305 DK	40	size_t
	41	HttpsMethod::parse_header(void buffer, size_t size, size_t nmemb, void userp)
	42	{
	43	size_t len = size * nmemb;
	44	HttpsMethod me = (HttpsMethod )userp;
	45	std::string line((char*) buffer, len);
	46	for (--len; len > 0; --len)
	47	if (isspace(line[len]) == 0)
	48	{
	49	++len;
	50	break;
	51	}
	52	line.erase(len);
	53
	54	if (line.empty() == true)
	55	{
	56	if (me->Server->Result != 416 && me->Server->StartPos != 0)
	57	;
	58	else if (me->Server->Result == 416 && me->Server->Size == me->File->FileSize())
	59	{
	60	me->Server->Result = 200;
	61	me->Server->StartPos = me->Server->Size;
	62	}
	63	else
	64	me->Server->StartPos = 0;
	65
	66	me->File->Truncate(me->Server->StartPos);
	67	me->File->Seek(me->Server->StartPos);
	68	}
	69	else if (me->Server->HeaderLine(line) == false)
	70	return 0;
	71
	72	return size*nmemb;
	73	}
	74
d546f98d MV	75	size_t
	76	HttpsMethod::write_data(void buffer, size_t size, size_t nmemb, void userp)
	77	{
	78	HttpsMethod me = (HttpsMethod )userp;
	79
f9b4f12d DK	80	if (me->Res.Size == 0)
f9b4f12d DK	81	me->URIStart(me->Res);
d546f98d MV	82	if(me->File->Write(buffer, size*nmemb) != true)
	83	return false;
	84
c48eea97	85	if(me->Queue->MaximumSize > 0 && me->File->Tell() > me->Queue->MaximumSize)
ee279506 MV	86	{
ee279506 MV	87	me->SetFailReason("MaximumSizeExceeded");
ffd2dd93	88	return _error->Error("Writing more data than expected (%llu > %llu)",
c48eea97	89	me->TotalWritten, me->Queue->MaximumSize);
ee279506	90	}
d546f98d MV	91	return size*nmemb;
	92	}
	93
65512241 DK	94	int
	95	HttpsMethod::progress_callback(void clientp, double dltotal, double /dlnow*/,
	96	double /ultotal/, double /ulnow/)
d546f98d MV	97	{
	98	HttpsMethod me = (HttpsMethod )clientp;
	99	if(dltotal > 0 && me->Res.Size == 0) {
650faab0	100	me->Res.Size = (unsigned long long)dltotal;
d546f98d MV	101	}
	102	return 0;
	103	}
	104
fd46d305	105	// HttpsServerState::HttpsServerState - Constructor /{{{/
65512241	106	HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * /Owner/) : ServerState(Srv, NULL)
fd46d305 DK	107	{
	108	TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
	109	Reset();
	110	}
	111	/}}}/
	112
4407a02f	113	void HttpsMethod::SetupProxy() /{{{/
d546f98d MV	114	{
	115	URI ServerName = Queue->Uri;
	116
c6ee61ea MV	117	// Determine the proxy setting
	118	AutoDetectProxy(ServerName);
	119
5b63d2a9 MV	120	// Curl should never read proxy settings from the environment, as
	121	// we determine which proxy to use. Do this for consistency among
	122	// methods and prevent an environment variable overriding a
	123	// no-proxy ("DIRECT") setting in apt.conf.
	124	curl_easy_setopt(curl, CURLOPT_PROXY, "");
	125
4407a02f MV	126	// Determine the proxy setting - try https first, fallback to http and use env at last
	127	string UseProxy = _config->Find("Acquire::https::Proxy::" + ServerName.Host,
	128	_config->Find("Acquire::http::Proxy::" + ServerName.Host).c_str());
	129
	130	if (UseProxy.empty() == true)
	131	UseProxy = _config->Find("Acquire::https::Proxy", _config->Find("Acquire::http::Proxy").c_str());
	132
	133	// User want to use NO proxy, so nothing to setup
	134	if (UseProxy == "DIRECT")
	135	return;
	136
	137	if (UseProxy.empty() == false)
d546f98d	138	{
4407a02f MV	139	// Parse no_proxy, a comma (,) separated list of domains we don't want to use
	140	// a proxy for so we stop right here if it is in the list
	141	if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
	142	return;
	143	} else {
5b63d2a9 MV	144	const char* result = getenv("https_proxy");
	145	// FIXME: Fall back to http_proxy is to remain compatible with
	146	// existing setups and behaviour of apt.conf. This should be
	147	// deprecated in the future (including apt.conf). Most other
	148	// programs do not fall back to http proxy settings and neither
	149	// should Apt.
	150	if (result == NULL)
	151	result = getenv("http_proxy");
4407a02f	152	UseProxy = result == NULL ? "" : result;
d546f98d	153	}
4407a02f	154
d546f98d	155	// Determine what host and port to use based on the proxy settings
4407a02f	156	if (UseProxy.empty() == false)
d546f98d	157	{
4407a02f MV	158	Proxy = UseProxy;
4407a02f MV	159	if (Proxy.Port != 1)
d546f98d MV	160	curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
d546f98d MV	161	curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
5b63d2a9 MV	162	if (Proxy.User.empty() == false \|\| Proxy.Password.empty() == false)
	163	{
	164	curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, Proxy.User.c_str());
	165	curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, Proxy.Password.c_str());
	166	}
d546f98d	167	}
b9e9a44b	168	} /}}}/
d546f98d MV	169	// HttpsMethod::Fetch - Fetch an item /{{{/
	170	// ---------------------------------------------------------------------
	171	/* This adds an item to the pipeline. We keep the pipeline at a fixed
	172	depth. */
	173	bool HttpsMethod::Fetch(FetchItem *Itm)
	174	{
d546f98d MV	175	struct stat SBuf;
d546f98d MV	176	struct curl_slist *headers=NULL;
714ee06c	177	char curl_errorstr[CURL_ERROR_SIZE];
c769cd6f MV	178	URI Uri = Itm->Uri;
c769cd6f MV	179	string remotehost = Uri.Host;
d546f98d MV	180
d546f98d MV	181	// TODO:
d546f98d MV	182	// - http::Pipeline-Depth
	183	// - error checking/reporting
	184	// - more debug options? (CURLOPT_DEBUGFUNCTION?)
	185
5820530d	186	curl_easy_reset(curl);
d546f98d MV	187	SetupProxy();
d546f98d MV	188
1de1f703	189	maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
592b7800	190
d546f98d	191	// callbacks
01fc8930	192	curl_easy_setopt(curl, CURLOPT_URL, static_cast<string>(Uri).c_str());
fd46d305 DK	193	curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_header);
fd46d305 DK	194	curl_easy_setopt(curl, CURLOPT_WRITEHEADER, this);
d546f98d MV	195	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
	196	curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
	197	curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
	198	curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
dc95fee1	199	// options
d546f98d	200	curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
5820530d	201	curl_easy_setopt(curl, CURLOPT_FILETIME, true);
889b0072 DK	202	// only allow curl to handle https, not the other stuff it supports
889b0072 DK	203	curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
dc95fee1	204	curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
d546f98d	205
c769cd6f MV	206	// SSL parameters are set by default to the common (non mirror-specific) value
	207	// if available (or a default one) and gets overload by mirror-specific ones.
	208
	209	// File containing the list of trusted CA.
	210	string cainfo = _config->Find("Acquire::https::CaInfo","");
	211	string knob = "Acquire::https::"+remotehost+"::CaInfo";
	212	cainfo = _config->Find(knob.c_str(),cainfo.c_str());
46e39c8e	213	if(cainfo.empty() == false)
c769cd6f MV	214	curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());
	215
	216	// Check server certificate against previous CA list ...
	217	bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
	218	knob = "Acquire::https::" + remotehost + "::Verify-Peer";
	219	peer_verify = _config->FindB(knob.c_str(), peer_verify);
714ee06c MV	220	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
714ee06c MV	221
c769cd6f	222	// ... and hostname against cert CN or subjectAltName
c769cd6f MV	223	bool verify = _config->FindB("Acquire::https::Verify-Host",true);
	224	knob = "Acquire::https::"+remotehost+"::Verify-Host";
	225	verify = _config->FindB(knob.c_str(),verify);
52b22cea DK	226	int const default_verify = (verify == true) ? 2 : 0;
52b22cea DK	227	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, default_verify);
c769cd6f	228
46e39c8e MV	229	// Also enforce issuer of server certificate using its cert
	230	string issuercert = _config->Find("Acquire::https::IssuerCert","");
	231	knob = "Acquire::https::"+remotehost+"::IssuerCert";
	232	issuercert = _config->Find(knob.c_str(),issuercert.c_str());
	233	if(issuercert.empty() == false)
	234	curl_easy_setopt(curl, CURLOPT_ISSUERCERT,issuercert.c_str());
	235
c769cd6f	236	// For client authentication, certificate file ...
714ee06c	237	string pem = _config->Find("Acquire::https::SslCert","");
c769cd6f MV	238	knob = "Acquire::https::"+remotehost+"::SslCert";
c769cd6f MV	239	pem = _config->Find(knob.c_str(),pem.c_str());
46e39c8e	240	if(pem.empty() == false)
714ee06c	241	curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
c769cd6f MV	242
	243	// ... and associated key.
	244	string key = _config->Find("Acquire::https::SslKey","");
	245	knob = "Acquire::https::"+remotehost+"::SslKey";
	246	key = _config->Find(knob.c_str(),key.c_str());
46e39c8e	247	if(key.empty() == false)
c769cd6f MV	248	curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());
	249
	250	// Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
	251	// supported by GnuTLS).
	252	long final_version = CURL_SSLVERSION_DEFAULT;
	253	string sslversion = _config->Find("Acquire::https::SslForceVersion","");
	254	knob = "Acquire::https::"+remotehost+"::SslForceVersion";
	255	sslversion = _config->Find(knob.c_str(),sslversion.c_str());
	256	if(sslversion == "TLSv1")
	257	final_version = CURL_SSLVERSION_TLSv1;
	258	else if(sslversion == "SSLv3")
	259	final_version = CURL_SSLVERSION_SSLv3;
	260	curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);
d546f98d	261
46e39c8e MV	262	// CRL file
	263	string crlfile = _config->Find("Acquire::https::CrlFile","");
	264	knob = "Acquire::https::"+remotehost+"::CrlFile";
	265	crlfile = _config->Find(knob.c_str(),crlfile.c_str());
	266	if(crlfile.empty() == false)
	267	curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str());
	268
d546f98d	269	// cache-control
b9e9a44b DK	270	if(_config->FindB("Acquire::https::No-Cache",
b9e9a44b DK	271	_config->FindB("Acquire::http::No-Cache",false)) == false)
d546f98d MV	272	{
d546f98d MV	273	// cache enabled
b9e9a44b DK	274	if (_config->FindB("Acquire::https::No-Store",
b9e9a44b DK	275	_config->FindB("Acquire::http::No-Store",false)) == true)
d546f98d	276	headers = curl_slist_append(headers,"Cache-Control: no-store");
8654fae9	277	stringstream ss;
b9e9a44b DK	278	ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::https::Max-Age",
b9e9a44b DK	279	_config->FindI("Acquire::http::Max-Age",0)));
d546f98d MV	280	headers = curl_slist_append(headers, ss.str().c_str());
	281	} else {
	282	// cache disabled by user
	283	headers = curl_slist_append(headers, "Cache-Control: no-cache");
	284	headers = curl_slist_append(headers, "Pragma: no-cache");
	285	}
	286	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
	287
d546f98d	288	// speed limit
46e39c8e	289	int const dlLimit = _config->FindI("Acquire::https::Dl-Limit",
b9e9a44b	290	_config->FindI("Acquire::http::Dl-Limit",0))*1024;
d546f98d MV	291	if (dlLimit > 0)
	292	curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
	293
	294	// set header
9f542bae DK	295	curl_easy_setopt(curl, CURLOPT_USERAGENT,
	296	_config->Find("Acquire::https::User-Agent",
	297	_config->Find("Acquire::http::User-Agent",
335e2c82	298	"Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());
d546f98d	299
cc615257	300	// set timeout
46e39c8e	301	int const timeout = _config->FindI("Acquire::https::Timeout",
b9e9a44b	302	_config->FindI("Acquire::http::Timeout",120));
cc615257	303	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
43cf55db	304	//set really low lowspeed timeout (see #497983)
5085e660	305	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, DL_MIN_SPEED);
43cf55db	306	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);
cc615257	307
668ce84d	308	// set redirect options and default to 10 redirects
46e39c8e	309	bool const AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
b9e9a44b	310	_config->FindB("Acquire::http::AllowRedirect",true));
668ce84d MV	311	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
	312	curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);
	313
d546f98d	314	// debug
714ee06c	315	if(_config->FindB("Debug::Acquire::https", false))
d546f98d MV	316	curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
d546f98d MV	317
714ee06c	318	// error handling
cc418115	319	curl_errorstr[0] = '\0';
714ee06c MV	320	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
714ee06c MV	321
6f4501f9	322	// If we ask for uncompressed files servers might respond with content-
1e3f4083	323	// negotiation which lets us end up with compressed files we do not support,
6f4501f9 DK	324	// see 657029, 657560 and co, so if we have no extension on the request
	325	// ask for text only. As a sidenote: If there is nothing to negotate servers
	326	// seem to be nice and ignore it.
	327	if (_config->FindB("Acquire::https::SendAccept", _config->FindB("Acquire::http::SendAccept", true)) == true)
	328	{
	329	size_t const filepos = Itm->Uri.find_last_of('/');
	330	string const file = Itm->Uri.substr(filepos + 1);
	331	if (flExtension(file) == file)
	332	headers = curl_slist_append(headers, "Accept: text/*");
	333	}
	334
d6039f9e	335	// if we have the file send an if-range query with a range header
4c499611 MV	336	if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
4c499611 MV	337	{
062074cb DK	338	std::string Buf;
	339	strprintf(Buf, "Range: bytes=%lli-", (long long) SBuf.st_size);
	340	headers = curl_slist_append(headers, Buf.c_str());
	341	strprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
	342	headers = curl_slist_append(headers, Buf.c_str());
8654fae9	343	}
d6039f9e MV	344	else if(Itm->LastModified > 0)
	345	{
	346	curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
	347	curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
4c499611	348	}
d546f98d MV	349
	350	// go for it - if the file exists, append on it
	351	File = new FileFd(Itm->DestFile, FileFd::WriteAny);
fd46d305	352	Server = new HttpsServerState(Itm->Uri, this);
85050e76	353
d546f98d MV	354	// keep apt updated
	355	Res.Filename = Itm->DestFile;
	356
	357	// get it!
	358	CURLcode success = curl_easy_perform(curl);
d546f98d	359
1dea08eb MV	360	// If the server returns 200 OK but the If-Modified-Since condition is not
	361	// met, CURLINFO_CONDITION_UNMET will be set to 1
	362	long curl_condition_unmet = 0;
	363	curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &curl_condition_unmet);
	364
db1f1469	365	File->Close();
85050e76	366	curl_slist_free_all(headers);
db1f1469	367
d546f98d	368	// cleanup
85050e76	369	if (success != 0)
4c499611	370	{
9b5d79ec	371	_error->Error("%s", curl_errorstr);
db1f1469	372	unlink(File->Name().c_str());
85050e76 DK	373	return false;
	374	}
	375
	376	// server says file not modified
fd46d305	377	if (Server->Result == 304 \|\| curl_condition_unmet == 1)
85050e76 DK	378	{
	379	unlink(File->Name().c_str());
	380	Res.IMSHit = true;
	381	Res.LastModified = Itm->LastModified;
	382	Res.Size = 0;
	383	URIDone(Res);
d546f98d MV	384	return true;
d546f98d MV	385	}
fd46d305	386	Res.IMSHit = false;
d546f98d	387
fd46d305 DK	388	if (Server->Result != 200 && // OK
	389	Server->Result != 206 && // Partial
	390	Server->Result != 416) // invalid Range
85050e76 DK	391	{
85050e76 DK	392	char err[255];
fd46d305	393	snprintf(err, sizeof(err) - 1, "HttpError%i", Server->Result);
85050e76 DK	394	SetFailReason(err);
	395	_error->Error("%s", err);
	396	// unlink, no need keep 401/404 page content in partial/
	397	unlink(File->Name().c_str());
	398	return false;
	399	}
	400
	401	struct stat resultStat;
	402	if (unlikely(stat(File->Name().c_str(), &resultStat) != 0))
	403	{
	404	_error->Errno("stat", "Unable to access file %s", File->Name().c_str());
	405	return false;
	406	}
	407	Res.Size = resultStat.st_size;
	408
	409	// invalid range-request
fd46d305	410	if (Server->Result == 416)
85050e76 DK	411	{
	412	unlink(File->Name().c_str());
	413	Res.Size = 0;
	414	delete File;
	415	Redirect(Itm->Uri);
	416	return true;
5820530d OS	417	}
5820530d OS	418
85050e76 DK	419	// Timestamp
	420	curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
	421	if (Res.LastModified != -1)
	422	{
246bbb61	423	struct timeval times[2];
9ce3cfc9 DK	424	times[0].tv_sec = Res.LastModified;
9ce3cfc9 DK	425	times[1].tv_sec = Res.LastModified;
246bbb61 DK	426	times[0].tv_usec = times[1].tv_usec = 0;
246bbb61 DK	427	utimes(File->Name().c_str(), times);
85050e76 DK	428	}
	429	else
	430	Res.LastModified = resultStat.st_mtime;
d546f98d MV	431
	432	// take hashes
	433	Hashes Hash;
	434	FileFd Fd(Res.Filename, FileFd::ReadOnly);
109eb151	435	Hash.AddFD(Fd);
d546f98d	436	Res.TakeHashes(Hash);
85050e76	437
d546f98d MV	438	// keep apt updated
	439	URIDone(Res);
	440
	441	// cleanup
d546f98d MV	442	Res.Size = 0;
d546f98d MV	443	delete File;
d546f98d MV	444
d546f98d MV	445	return true;
d3e8fbb3	446	}
d546f98d MV	447
	448	int main()
	449	{
	450	setlocale(LC_ALL, "");
	451
	452	HttpsMethod Mth;
	453	curl_global_init(CURL_GLOBAL_SSL) ;
	454
7b18d559 JAK	455	Mth.DropPrivsOrDie();
7b18d559 JAK	456
d546f98d MV	457	return Mth.Run();
	458	}
	459