[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;
	 // the actual size is not important for https as curl will deal with it
	 // by itself and e.g. doesn't bother us with transport-encoding…
	 me->Server->JunkSize = std::numeric_limits<unsigned long long>::max();
      }
      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;
   size_t buffer_size = size * nmemb;
   // we don't need to count the junk here, just drop anything we get as
   // we don't always know how long it would be, e.g. in chunked encoding.
   if (me->Server->JunkSize != 0)
      return buffer_size;

   if (me->ReceivedData == false)
   {
      me->URIStart(me->Res);
      me->ReceivedData = true;
   }

   if(me->File->Write(buffer, buffer_size) != true)
      return false;

   return buffer_size;
}

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;
   ReceivedData = false;

   // 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());
      Res.Size = 0;
      Res.LastModified = 0;
      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
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;
92e8c1ff DK	62	// the actual size is not important for https as curl will deal with it
	63	// by itself and e.g. doesn't bother us with transport-encoding…
	64	me->Server->JunkSize = std::numeric_limits<unsigned long long>::max();
fd46d305 DK	65	}
	66	else
	67	me->Server->StartPos = 0;
	68
	69	me->File->Truncate(me->Server->StartPos);
	70	me->File->Seek(me->Server->StartPos);
	71	}
	72	else if (me->Server->HeaderLine(line) == false)
	73	return 0;
	74
	75	return size*nmemb;
	76	}
	77
d546f98d MV	78	size_t
	79	HttpsMethod::write_data(void buffer, size_t size, size_t nmemb, void userp)
	80	{
	81	HttpsMethod me = (HttpsMethod )userp;
92e8c1ff DK	82	size_t buffer_size = size * nmemb;
	83	// we don't need to count the junk here, just drop anything we get as
	84	// we don't always know how long it would be, e.g. in chunked encoding.
	85	if (me->Server->JunkSize != 0)
	86	return buffer_size;
d546f98d	87
9127d7ae MV	88	if (me->ReceivedData == false)
9127d7ae MV	89	{
f9b4f12d	90	me->URIStart(me->Res);
9127d7ae MV	91	me->ReceivedData = true;
	92	}
	93
92e8c1ff	94	if(me->File->Write(buffer, buffer_size) != true)
d546f98d MV	95	return false;
d546f98d MV	96
92e8c1ff	97	return buffer_size;
d546f98d MV	98	}
d546f98d MV	99
65512241 DK	100	int
65512241 DK	101	HttpsMethod::progress_callback(void clientp, double dltotal, double /dlnow*/,
9127d7ae	102	double /ultotal/, double /ulnow/)
d546f98d MV	103	{
	104	HttpsMethod me = (HttpsMethod )clientp;
	105	if(dltotal > 0 && me->Res.Size == 0) {
650faab0	106	me->Res.Size = (unsigned long long)dltotal;
d546f98d MV	107	}
	108	return 0;
	109	}
	110
fd46d305	111	// HttpsServerState::HttpsServerState - Constructor /{{{/
65512241	112	HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * /Owner/) : ServerState(Srv, NULL)
fd46d305 DK	113	{
	114	TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
	115	Reset();
	116	}
	117	/}}}/
	118
4407a02f	119	void HttpsMethod::SetupProxy() /{{{/
d546f98d MV	120	{
	121	URI ServerName = Queue->Uri;
	122
c6ee61ea MV	123	// Determine the proxy setting
	124	AutoDetectProxy(ServerName);
	125
5b63d2a9 MV	126	// Curl should never read proxy settings from the environment, as
	127	// we determine which proxy to use. Do this for consistency among
	128	// methods and prevent an environment variable overriding a
	129	// no-proxy ("DIRECT") setting in apt.conf.
	130	curl_easy_setopt(curl, CURLOPT_PROXY, "");
	131
4407a02f MV	132	// Determine the proxy setting - try https first, fallback to http and use env at last
	133	string UseProxy = _config->Find("Acquire::https::Proxy::" + ServerName.Host,
	134	_config->Find("Acquire::http::Proxy::" + ServerName.Host).c_str());
	135
	136	if (UseProxy.empty() == true)
	137	UseProxy = _config->Find("Acquire::https::Proxy", _config->Find("Acquire::http::Proxy").c_str());
	138
	139	// User want to use NO proxy, so nothing to setup
	140	if (UseProxy == "DIRECT")
	141	return;
	142
	143	if (UseProxy.empty() == false)
d546f98d	144	{
4407a02f MV	145	// Parse no_proxy, a comma (,) separated list of domains we don't want to use
	146	// a proxy for so we stop right here if it is in the list
	147	if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
	148	return;
	149	} else {
5b63d2a9 MV	150	const char* result = getenv("https_proxy");
	151	// FIXME: Fall back to http_proxy is to remain compatible with
	152	// existing setups and behaviour of apt.conf. This should be
	153	// deprecated in the future (including apt.conf). Most other
	154	// programs do not fall back to http proxy settings and neither
	155	// should Apt.
	156	if (result == NULL)
	157	result = getenv("http_proxy");
4407a02f	158	UseProxy = result == NULL ? "" : result;
d546f98d	159	}
4407a02f	160
d546f98d	161	// Determine what host and port to use based on the proxy settings
4407a02f	162	if (UseProxy.empty() == false)
d546f98d	163	{
4407a02f MV	164	Proxy = UseProxy;
4407a02f MV	165	if (Proxy.Port != 1)
d546f98d MV	166	curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
d546f98d MV	167	curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
5b63d2a9 MV	168	if (Proxy.User.empty() == false \|\| Proxy.Password.empty() == false)
	169	{
	170	curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, Proxy.User.c_str());
	171	curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, Proxy.Password.c_str());
	172	}
d546f98d	173	}
b9e9a44b	174	} /}}}/
d546f98d MV	175	// HttpsMethod::Fetch - Fetch an item /{{{/
	176	// ---------------------------------------------------------------------
	177	/* This adds an item to the pipeline. We keep the pipeline at a fixed
	178	depth. */
	179	bool HttpsMethod::Fetch(FetchItem *Itm)
	180	{
d546f98d MV	181	struct stat SBuf;
d546f98d MV	182	struct curl_slist *headers=NULL;
714ee06c	183	char curl_errorstr[CURL_ERROR_SIZE];
c769cd6f MV	184	URI Uri = Itm->Uri;
c769cd6f MV	185	string remotehost = Uri.Host;
9127d7ae	186	ReceivedData = false;
d546f98d MV	187
d546f98d MV	188	// TODO:
d546f98d MV	189	// - http::Pipeline-Depth
	190	// - error checking/reporting
	191	// - more debug options? (CURLOPT_DEBUGFUNCTION?)
	192
5820530d	193	curl_easy_reset(curl);
d546f98d MV	194	SetupProxy();
d546f98d MV	195
1de1f703	196	maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
592b7800	197
d546f98d	198	// callbacks
01fc8930	199	curl_easy_setopt(curl, CURLOPT_URL, static_cast<string>(Uri).c_str());
fd46d305 DK	200	curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_header);
fd46d305 DK	201	curl_easy_setopt(curl, CURLOPT_WRITEHEADER, this);
d546f98d MV	202	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
	203	curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
	204	curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
	205	curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
dc95fee1	206	// options
d546f98d	207	curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
5820530d	208	curl_easy_setopt(curl, CURLOPT_FILETIME, true);
889b0072 DK	209	// only allow curl to handle https, not the other stuff it supports
889b0072 DK	210	curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
dc95fee1	211	curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
d546f98d	212
c769cd6f MV	213	// SSL parameters are set by default to the common (non mirror-specific) value
	214	// if available (or a default one) and gets overload by mirror-specific ones.
	215
	216	// File containing the list of trusted CA.
	217	string cainfo = _config->Find("Acquire::https::CaInfo","");
	218	string knob = "Acquire::https::"+remotehost+"::CaInfo";
	219	cainfo = _config->Find(knob.c_str(),cainfo.c_str());
46e39c8e	220	if(cainfo.empty() == false)
c769cd6f MV	221	curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());
	222
	223	// Check server certificate against previous CA list ...
	224	bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
	225	knob = "Acquire::https::" + remotehost + "::Verify-Peer";
	226	peer_verify = _config->FindB(knob.c_str(), peer_verify);
714ee06c MV	227	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
714ee06c MV	228
c769cd6f	229	// ... and hostname against cert CN or subjectAltName
c769cd6f MV	230	bool verify = _config->FindB("Acquire::https::Verify-Host",true);
	231	knob = "Acquire::https::"+remotehost+"::Verify-Host";
	232	verify = _config->FindB(knob.c_str(),verify);
52b22cea DK	233	int const default_verify = (verify == true) ? 2 : 0;
52b22cea DK	234	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, default_verify);
c769cd6f	235
46e39c8e MV	236	// Also enforce issuer of server certificate using its cert
	237	string issuercert = _config->Find("Acquire::https::IssuerCert","");
	238	knob = "Acquire::https::"+remotehost+"::IssuerCert";
	239	issuercert = _config->Find(knob.c_str(),issuercert.c_str());
	240	if(issuercert.empty() == false)
	241	curl_easy_setopt(curl, CURLOPT_ISSUERCERT,issuercert.c_str());
	242
c769cd6f	243	// For client authentication, certificate file ...
714ee06c	244	string pem = _config->Find("Acquire::https::SslCert","");
c769cd6f MV	245	knob = "Acquire::https::"+remotehost+"::SslCert";
c769cd6f MV	246	pem = _config->Find(knob.c_str(),pem.c_str());
46e39c8e	247	if(pem.empty() == false)
714ee06c	248	curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
c769cd6f MV	249
	250	// ... and associated key.
	251	string key = _config->Find("Acquire::https::SslKey","");
	252	knob = "Acquire::https::"+remotehost+"::SslKey";
	253	key = _config->Find(knob.c_str(),key.c_str());
46e39c8e	254	if(key.empty() == false)
c769cd6f MV	255	curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());
	256
	257	// Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
	258	// supported by GnuTLS).
	259	long final_version = CURL_SSLVERSION_DEFAULT;
	260	string sslversion = _config->Find("Acquire::https::SslForceVersion","");
	261	knob = "Acquire::https::"+remotehost+"::SslForceVersion";
	262	sslversion = _config->Find(knob.c_str(),sslversion.c_str());
	263	if(sslversion == "TLSv1")
	264	final_version = CURL_SSLVERSION_TLSv1;
	265	else if(sslversion == "SSLv3")
	266	final_version = CURL_SSLVERSION_SSLv3;
	267	curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);
d546f98d	268
46e39c8e MV	269	// CRL file
	270	string crlfile = _config->Find("Acquire::https::CrlFile","");
	271	knob = "Acquire::https::"+remotehost+"::CrlFile";
	272	crlfile = _config->Find(knob.c_str(),crlfile.c_str());
	273	if(crlfile.empty() == false)
	274	curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str());
	275
d546f98d	276	// cache-control
b9e9a44b DK	277	if(_config->FindB("Acquire::https::No-Cache",
b9e9a44b DK	278	_config->FindB("Acquire::http::No-Cache",false)) == false)
d546f98d MV	279	{
d546f98d MV	280	// cache enabled
b9e9a44b DK	281	if (_config->FindB("Acquire::https::No-Store",
b9e9a44b DK	282	_config->FindB("Acquire::http::No-Store",false)) == true)
d546f98d	283	headers = curl_slist_append(headers,"Cache-Control: no-store");
8654fae9	284	stringstream ss;
b9e9a44b DK	285	ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::https::Max-Age",
b9e9a44b DK	286	_config->FindI("Acquire::http::Max-Age",0)));
d546f98d MV	287	headers = curl_slist_append(headers, ss.str().c_str());
	288	} else {
	289	// cache disabled by user
	290	headers = curl_slist_append(headers, "Cache-Control: no-cache");
	291	headers = curl_slist_append(headers, "Pragma: no-cache");
	292	}
	293	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
	294
d546f98d	295	// speed limit
46e39c8e	296	int const dlLimit = _config->FindI("Acquire::https::Dl-Limit",
b9e9a44b	297	_config->FindI("Acquire::http::Dl-Limit",0))*1024;
d546f98d MV	298	if (dlLimit > 0)
	299	curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
	300
	301	// set header
9f542bae DK	302	curl_easy_setopt(curl, CURLOPT_USERAGENT,
	303	_config->Find("Acquire::https::User-Agent",
	304	_config->Find("Acquire::http::User-Agent",
335e2c82	305	"Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());
d546f98d	306
cc615257	307	// set timeout
46e39c8e	308	int const timeout = _config->FindI("Acquire::https::Timeout",
b9e9a44b	309	_config->FindI("Acquire::http::Timeout",120));
cc615257	310	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
43cf55db	311	//set really low lowspeed timeout (see #497983)
5085e660	312	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, DL_MIN_SPEED);
43cf55db	313	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);
cc615257	314
668ce84d	315	// set redirect options and default to 10 redirects
46e39c8e	316	bool const AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
b9e9a44b	317	_config->FindB("Acquire::http::AllowRedirect",true));
668ce84d MV	318	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
	319	curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);
	320
d546f98d	321	// debug
714ee06c	322	if(_config->FindB("Debug::Acquire::https", false))
d546f98d MV	323	curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
d546f98d MV	324
714ee06c	325	// error handling
cc418115	326	curl_errorstr[0] = '\0';
714ee06c MV	327	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
714ee06c MV	328
6f4501f9	329	// If we ask for uncompressed files servers might respond with content-
1e3f4083	330	// negotiation which lets us end up with compressed files we do not support,
6f4501f9 DK	331	// see 657029, 657560 and co, so if we have no extension on the request
	332	// ask for text only. As a sidenote: If there is nothing to negotate servers
	333	// seem to be nice and ignore it.
	334	if (_config->FindB("Acquire::https::SendAccept", _config->FindB("Acquire::http::SendAccept", true)) == true)
	335	{
	336	size_t const filepos = Itm->Uri.find_last_of('/');
	337	string const file = Itm->Uri.substr(filepos + 1);
	338	if (flExtension(file) == file)
	339	headers = curl_slist_append(headers, "Accept: text/*");
	340	}
	341
d6039f9e	342	// if we have the file send an if-range query with a range header
4c499611 MV	343	if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
4c499611 MV	344	{
062074cb DK	345	std::string Buf;
	346	strprintf(Buf, "Range: bytes=%lli-", (long long) SBuf.st_size);
	347	headers = curl_slist_append(headers, Buf.c_str());
	348	strprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
	349	headers = curl_slist_append(headers, Buf.c_str());
8654fae9	350	}
d6039f9e MV	351	else if(Itm->LastModified > 0)
	352	{
	353	curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
	354	curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
4c499611	355	}
d546f98d MV	356
	357	// go for it - if the file exists, append on it
	358	File = new FileFd(Itm->DestFile, FileFd::WriteAny);
fd46d305	359	Server = new HttpsServerState(Itm->Uri, this);
85050e76	360
d546f98d MV	361	// keep apt updated
	362	Res.Filename = Itm->DestFile;
	363
	364	// get it!
	365	CURLcode success = curl_easy_perform(curl);
d546f98d	366
1dea08eb MV	367	// If the server returns 200 OK but the If-Modified-Since condition is not
	368	// met, CURLINFO_CONDITION_UNMET will be set to 1
	369	long curl_condition_unmet = 0;
	370	curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &curl_condition_unmet);
	371
db1f1469	372	File->Close();
85050e76	373	curl_slist_free_all(headers);
db1f1469	374
d546f98d	375	// cleanup
85050e76	376	if (success != 0)
4c499611	377	{
9b5d79ec	378	_error->Error("%s", curl_errorstr);
db1f1469	379	unlink(File->Name().c_str());
85050e76 DK	380	return false;
	381	}
	382
	383	// server says file not modified
fd46d305	384	if (Server->Result == 304 \|\| curl_condition_unmet == 1)
85050e76 DK	385	{
	386	unlink(File->Name().c_str());
	387	Res.IMSHit = true;
	388	Res.LastModified = Itm->LastModified;
	389	Res.Size = 0;
	390	URIDone(Res);
d546f98d MV	391	return true;
d546f98d MV	392	}
fd46d305	393	Res.IMSHit = false;
d546f98d	394
fd46d305 DK	395	if (Server->Result != 200 && // OK
	396	Server->Result != 206 && // Partial
	397	Server->Result != 416) // invalid Range
85050e76 DK	398	{
85050e76 DK	399	char err[255];
fd46d305	400	snprintf(err, sizeof(err) - 1, "HttpError%i", Server->Result);
85050e76 DK	401	SetFailReason(err);
	402	_error->Error("%s", err);
	403	// unlink, no need keep 401/404 page content in partial/
	404	unlink(File->Name().c_str());
1296bc7c RE	405	Res.Size = 0;
1296bc7c RE	406	Res.LastModified = 0;
85050e76 DK	407	return false;
	408	}
	409
	410	struct stat resultStat;
	411	if (unlikely(stat(File->Name().c_str(), &resultStat) != 0))
	412	{
	413	_error->Errno("stat", "Unable to access file %s", File->Name().c_str());
	414	return false;
	415	}
	416	Res.Size = resultStat.st_size;
	417
	418	// invalid range-request
fd46d305	419	if (Server->Result == 416)
85050e76 DK	420	{
	421	unlink(File->Name().c_str());
	422	Res.Size = 0;
	423	delete File;
	424	Redirect(Itm->Uri);
	425	return true;
5820530d OS	426	}
5820530d OS	427
85050e76 DK	428	// Timestamp
	429	curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
	430	if (Res.LastModified != -1)
	431	{
246bbb61	432	struct timeval times[2];
9ce3cfc9 DK	433	times[0].tv_sec = Res.LastModified;
9ce3cfc9 DK	434	times[1].tv_sec = Res.LastModified;
246bbb61 DK	435	times[0].tv_usec = times[1].tv_usec = 0;
246bbb61 DK	436	utimes(File->Name().c_str(), times);
85050e76 DK	437	}
	438	else
	439	Res.LastModified = resultStat.st_mtime;
d546f98d MV	440
	441	// take hashes
	442	Hashes Hash;
	443	FileFd Fd(Res.Filename, FileFd::ReadOnly);
109eb151	444	Hash.AddFD(Fd);
d546f98d	445	Res.TakeHashes(Hash);
85050e76	446
d546f98d MV	447	// keep apt updated
	448	URIDone(Res);
	449
	450	// cleanup
d546f98d MV	451	Res.Size = 0;
d546f98d MV	452	delete File;
d546f98d MV	453
d546f98d MV	454	return true;
d3e8fbb3	455	}
d546f98d MV	456
	457	int main()
	458	{
	459	setlocale(LC_ALL, "");
	460
	461	HttpsMethod Mth;
	462	curl_global_init(CURL_GLOBAL_SSL) ;
	463
	464	return Mth.Run();
	465	}
	466