[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 <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;

   me->TotalWritten += size*nmemb;
   if(me->TotalWritten > me->Queue->ExpectedSize)
      return _error->Error("Writing more data than expected (%llu > %llu)",
                           me->TotalWritten, me->Queue->ExpectedSize);


   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;

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