[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;

struct APT_HIDDEN CURLUserPointer {
   HttpsMethod * const https;
   HttpsMethod::FetchResult * const Res;
   CURLUserPointer(HttpsMethod * const https, HttpsMethod::FetchResult * const Res) : https(https), Res(Res) {}
};

size_t
HttpsMethod::parse_header(void *buffer, size_t size, size_t nmemb, void *userp)
{
   size_t len = size * nmemb;
   CURLUserPointer *me = (CURLUserPointer *)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->https->Server->Result != 416 && me->https->Server->StartPos != 0)
	 ;
      else if (me->https->Server->Result == 416 && me->https->Server->Size == me->https->File->FileSize())
      {
         me->https->Server->Result = 200;
	 me->https->Server->StartPos = me->https->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->https->Server->JunkSize = std::numeric_limits<unsigned long long>::max();
      }
      else
	 me->https->Server->StartPos = 0;

      me->https->File->Truncate(me->https->Server->StartPos);
      me->https->File->Seek(me->https->Server->StartPos);

      me->Res->LastModified = me->https->Server->Date;
      me->Res->Size = me->https->Server->Size;
      me->Res->ResumePoint = me->https->Server->StartPos;

      // we expect valid data, so tell our caller we get the file now
      if (me->https->Server->Result >= 200 && me->https->Server->Result < 300 &&
	    me->https->Server->JunkSize == 0 &&
	    me->Res->Size != 0 && me->Res->Size > me->Res->ResumePoint)
	 me->https->URIStart(*me->Res);
   }
   else if (me->https->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->File->Write(buffer, buffer_size) != true)
      return 0;

   if(me->Queue->MaximumSize > 0)
   {
      unsigned long long const TotalWritten = me->File->Tell();
      if (TotalWritten > me->Queue->MaximumSize)
      {
	 me->SetFailReason("MaximumSizeExceeded");
	 _error->Error("Writing more data than expected (%llu > %llu)",
	       TotalWritten, me->Queue->MaximumSize);
	 return 0;
      }
   }

   return buffer_size;
}

// HttpsServerState::HttpsServerState - Constructor			/*{{{*/
HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * Owner) : ServerState(Srv, Owner)
{
   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"));

   FetchResult Res;
   CURLUserPointer userp(this, &Res);
   // 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, &userp);
   curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
   curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
   // options
   curl_easy_setopt(curl, CURLOPT_NOPROGRESS, true);
   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
   curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
   curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);

   // debug
   if (Debug == true)
      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 = CreateServerState(Itm->Uri);

   // 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);
      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;
   }

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

   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;

   // 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
   delete File;

   return true;
}
									/*}}}*/
// HttpsMethod::Configuration - Handle a configuration message		/*{{{*/
bool HttpsMethod::Configuration(string Message)
{
   if (ServerMethod::Configuration(Message) == false)
      return false;

   AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
	_config->FindB("Acquire::http::AllowRedirect", true));
   Debug = _config->FindB("Debug::Acquire::https",false);

   return true;
}
									/*}}}*/
ServerState * HttpsMethod::CreateServerState(URI uri)			/*{{{*/
{
   return new HttpsServerState(uri, this);
}
									/*}}}*/

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
27925d82 DK	40	struct APT_HIDDEN CURLUserPointer {
	41	HttpsMethod * const https;
	42	HttpsMethod::FetchResult * const Res;
	43	CURLUserPointer(HttpsMethod * const https, HttpsMethod::FetchResult * const Res) : https(https), Res(Res) {}
	44	};
	45
fd46d305 DK	46	size_t
	47	HttpsMethod::parse_header(void buffer, size_t size, size_t nmemb, void userp)
	48	{
	49	size_t len = size * nmemb;
27925d82	50	CURLUserPointer me = (CURLUserPointer )userp;
fd46d305 DK	51	std::string line((char*) buffer, len);
	52	for (--len; len > 0; --len)
	53	if (isspace(line[len]) == 0)
	54	{
	55	++len;
	56	break;
	57	}
	58	line.erase(len);
	59
	60	if (line.empty() == true)
	61	{
27925d82	62	if (me->https->Server->Result != 416 && me->https->Server->StartPos != 0)
fd46d305	63	;
27925d82	64	else if (me->https->Server->Result == 416 && me->https->Server->Size == me->https->File->FileSize())
fd46d305	65	{
27925d82 DK	66	me->https->Server->Result = 200;
27925d82 DK	67	me->https->Server->StartPos = me->https->Server->Size;
ed793a19 DK	68	// the actual size is not important for https as curl will deal with it
ed793a19 DK	69	// by itself and e.g. doesn't bother us with transport-encoding…
27925d82	70	me->https->Server->JunkSize = std::numeric_limits<unsigned long long>::max();
fd46d305 DK	71	}
fd46d305 DK	72	else
27925d82 DK	73	me->https->Server->StartPos = 0;
	74
	75	me->https->File->Truncate(me->https->Server->StartPos);
	76	me->https->File->Seek(me->https->Server->StartPos);
	77
	78	me->Res->LastModified = me->https->Server->Date;
	79	me->Res->Size = me->https->Server->Size;
	80	me->Res->ResumePoint = me->https->Server->StartPos;
fd46d305	81
27925d82 DK	82	// we expect valid data, so tell our caller we get the file now
	83	if (me->https->Server->Result >= 200 && me->https->Server->Result < 300 &&
	84	me->https->Server->JunkSize == 0 &&
	85	me->Res->Size != 0 && me->Res->Size > me->Res->ResumePoint)
	86	me->https->URIStart(*me->Res);
fd46d305	87	}
27925d82	88	else if (me->https->Server->HeaderLine(line) == false)
fd46d305 DK	89	return 0;
	90
	91	return size*nmemb;
	92	}
	93
d546f98d MV	94	size_t
	95	HttpsMethod::write_data(void buffer, size_t size, size_t nmemb, void userp)
	96	{
	97	HttpsMethod me = (HttpsMethod )userp;
ed793a19 DK	98	size_t buffer_size = size * nmemb;
	99	// we don't need to count the junk here, just drop anything we get as
	100	// we don't always know how long it would be, e.g. in chunked encoding.
	101	if (me->Server->JunkSize != 0)
	102	return buffer_size;
d546f98d	103
ed793a19	104	if(me->File->Write(buffer, buffer_size) != true)
d61960d9	105	return 0;
d546f98d	106
d61960d9	107	if(me->Queue->MaximumSize > 0)
ee279506	108	{
d61960d9 DK	109	unsigned long long const TotalWritten = me->File->Tell();
	110	if (TotalWritten > me->Queue->MaximumSize)
	111	{
	112	me->SetFailReason("MaximumSizeExceeded");
	113	_error->Error("Writing more data than expected (%llu > %llu)",
	114	TotalWritten, me->Queue->MaximumSize);
	115	return 0;
	116	}
ee279506	117	}
d546f98d	118
ed793a19	119	return buffer_size;
d546f98d MV	120	}
d546f98d MV	121
fd46d305	122	// HttpsServerState::HttpsServerState - Constructor /{{{/
905fba60	123	HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * Owner) : ServerState(Srv, Owner)
fd46d305 DK	124	{
	125	TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
	126	Reset();
	127	}
	128	/}}}/
	129
27925d82	130	void HttpsMethod::SetupProxy() /{{{/
d546f98d MV	131	{
	132	URI ServerName = Queue->Uri;
	133
c6ee61ea MV	134	// Determine the proxy setting
	135	AutoDetectProxy(ServerName);
	136
5b63d2a9 MV	137	// Curl should never read proxy settings from the environment, as
	138	// we determine which proxy to use. Do this for consistency among
	139	// methods and prevent an environment variable overriding a
	140	// no-proxy ("DIRECT") setting in apt.conf.
	141	curl_easy_setopt(curl, CURLOPT_PROXY, "");
	142
4407a02f MV	143	// Determine the proxy setting - try https first, fallback to http and use env at last
	144	string UseProxy = _config->Find("Acquire::https::Proxy::" + ServerName.Host,
	145	_config->Find("Acquire::http::Proxy::" + ServerName.Host).c_str());
	146
	147	if (UseProxy.empty() == true)
	148	UseProxy = _config->Find("Acquire::https::Proxy", _config->Find("Acquire::http::Proxy").c_str());
	149
	150	// User want to use NO proxy, so nothing to setup
	151	if (UseProxy == "DIRECT")
	152	return;
	153
	154	if (UseProxy.empty() == false)
d546f98d	155	{
4407a02f MV	156	// Parse no_proxy, a comma (,) separated list of domains we don't want to use
	157	// a proxy for so we stop right here if it is in the list
	158	if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
	159	return;
	160	} else {
5b63d2a9 MV	161	const char* result = getenv("https_proxy");
	162	// FIXME: Fall back to http_proxy is to remain compatible with
	163	// existing setups and behaviour of apt.conf. This should be
	164	// deprecated in the future (including apt.conf). Most other
	165	// programs do not fall back to http proxy settings and neither
	166	// should Apt.
	167	if (result == NULL)
	168	result = getenv("http_proxy");
4407a02f	169	UseProxy = result == NULL ? "" : result;
d546f98d	170	}
4407a02f	171
d546f98d	172	// Determine what host and port to use based on the proxy settings
4407a02f	173	if (UseProxy.empty() == false)
d546f98d	174	{
4407a02f MV	175	Proxy = UseProxy;
4407a02f MV	176	if (Proxy.Port != 1)
d546f98d MV	177	curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
d546f98d MV	178	curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
5b63d2a9 MV	179	if (Proxy.User.empty() == false \|\| Proxy.Password.empty() == false)
	180	{
	181	curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, Proxy.User.c_str());
	182	curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, Proxy.Password.c_str());
	183	}
d546f98d	184	}
b9e9a44b	185	} /}}}/
d546f98d MV	186	// HttpsMethod::Fetch - Fetch an item /{{{/
	187	// ---------------------------------------------------------------------
	188	/* This adds an item to the pipeline. We keep the pipeline at a fixed
	189	depth. */
	190	bool HttpsMethod::Fetch(FetchItem *Itm)
	191	{
d546f98d	192	struct stat SBuf;
d61960d9	193	struct curl_slist *headers=NULL;
714ee06c	194	char curl_errorstr[CURL_ERROR_SIZE];
c769cd6f MV	195	URI Uri = Itm->Uri;
c769cd6f MV	196	string remotehost = Uri.Host;
d546f98d MV	197
d546f98d MV	198	// TODO:
d546f98d MV	199	// - http::Pipeline-Depth
	200	// - error checking/reporting
	201	// - more debug options? (CURLOPT_DEBUGFUNCTION?)
	202
5820530d	203	curl_easy_reset(curl);
d546f98d MV	204	SetupProxy();
d546f98d MV	205
1de1f703	206	maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
592b7800	207
27925d82 DK	208	FetchResult Res;
27925d82 DK	209	CURLUserPointer userp(this, &Res);
d546f98d	210	// callbacks
01fc8930	211	curl_easy_setopt(curl, CURLOPT_URL, static_cast<string>(Uri).c_str());
fd46d305	212	curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_header);
27925d82	213	curl_easy_setopt(curl, CURLOPT_WRITEHEADER, &userp);
d546f98d MV	214	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
d546f98d MV	215	curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
dc95fee1	216	// options
27925d82	217	curl_easy_setopt(curl, CURLOPT_NOPROGRESS, true);
5820530d	218	curl_easy_setopt(curl, CURLOPT_FILETIME, true);
889b0072 DK	219	// only allow curl to handle https, not the other stuff it supports
889b0072 DK	220	curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
dc95fee1	221	curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
d546f98d	222
c769cd6f MV	223	// SSL parameters are set by default to the common (non mirror-specific) value
	224	// if available (or a default one) and gets overload by mirror-specific ones.
	225
	226	// File containing the list of trusted CA.
	227	string cainfo = _config->Find("Acquire::https::CaInfo","");
	228	string knob = "Acquire::https::"+remotehost+"::CaInfo";
	229	cainfo = _config->Find(knob.c_str(),cainfo.c_str());
46e39c8e	230	if(cainfo.empty() == false)
c769cd6f MV	231	curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());
	232
	233	// Check server certificate against previous CA list ...
	234	bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
	235	knob = "Acquire::https::" + remotehost + "::Verify-Peer";
	236	peer_verify = _config->FindB(knob.c_str(), peer_verify);
714ee06c MV	237	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
714ee06c MV	238
c769cd6f	239	// ... and hostname against cert CN or subjectAltName
c769cd6f MV	240	bool verify = _config->FindB("Acquire::https::Verify-Host",true);
	241	knob = "Acquire::https::"+remotehost+"::Verify-Host";
	242	verify = _config->FindB(knob.c_str(),verify);
52b22cea DK	243	int const default_verify = (verify == true) ? 2 : 0;
52b22cea DK	244	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, default_verify);
c769cd6f	245
46e39c8e MV	246	// Also enforce issuer of server certificate using its cert
	247	string issuercert = _config->Find("Acquire::https::IssuerCert","");
	248	knob = "Acquire::https::"+remotehost+"::IssuerCert";
	249	issuercert = _config->Find(knob.c_str(),issuercert.c_str());
	250	if(issuercert.empty() == false)
	251	curl_easy_setopt(curl, CURLOPT_ISSUERCERT,issuercert.c_str());
	252
c769cd6f	253	// For client authentication, certificate file ...
714ee06c	254	string pem = _config->Find("Acquire::https::SslCert","");
c769cd6f MV	255	knob = "Acquire::https::"+remotehost+"::SslCert";
c769cd6f MV	256	pem = _config->Find(knob.c_str(),pem.c_str());
46e39c8e	257	if(pem.empty() == false)
714ee06c	258	curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
c769cd6f MV	259
	260	// ... and associated key.
	261	string key = _config->Find("Acquire::https::SslKey","");
	262	knob = "Acquire::https::"+remotehost+"::SslKey";
	263	key = _config->Find(knob.c_str(),key.c_str());
46e39c8e	264	if(key.empty() == false)
c769cd6f MV	265	curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());
	266
	267	// Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
	268	// supported by GnuTLS).
	269	long final_version = CURL_SSLVERSION_DEFAULT;
	270	string sslversion = _config->Find("Acquire::https::SslForceVersion","");
	271	knob = "Acquire::https::"+remotehost+"::SslForceVersion";
	272	sslversion = _config->Find(knob.c_str(),sslversion.c_str());
	273	if(sslversion == "TLSv1")
	274	final_version = CURL_SSLVERSION_TLSv1;
	275	else if(sslversion == "SSLv3")
	276	final_version = CURL_SSLVERSION_SSLv3;
	277	curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);
d546f98d	278
46e39c8e MV	279	// CRL file
	280	string crlfile = _config->Find("Acquire::https::CrlFile","");
	281	knob = "Acquire::https::"+remotehost+"::CrlFile";
	282	crlfile = _config->Find(knob.c_str(),crlfile.c_str());
	283	if(crlfile.empty() == false)
	284	curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str());
	285
d546f98d	286	// cache-control
b9e9a44b DK	287	if(_config->FindB("Acquire::https::No-Cache",
b9e9a44b DK	288	_config->FindB("Acquire::http::No-Cache",false)) == false)
d546f98d MV	289	{
d546f98d MV	290	// cache enabled
b9e9a44b DK	291	if (_config->FindB("Acquire::https::No-Store",
b9e9a44b DK	292	_config->FindB("Acquire::http::No-Store",false)) == true)
d546f98d	293	headers = curl_slist_append(headers,"Cache-Control: no-store");
8654fae9	294	stringstream ss;
b9e9a44b DK	295	ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::https::Max-Age",
b9e9a44b DK	296	_config->FindI("Acquire::http::Max-Age",0)));
d546f98d MV	297	headers = curl_slist_append(headers, ss.str().c_str());
	298	} else {
	299	// cache disabled by user
	300	headers = curl_slist_append(headers, "Cache-Control: no-cache");
	301	headers = curl_slist_append(headers, "Pragma: no-cache");
	302	}
	303	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
	304
d546f98d	305	// speed limit
46e39c8e	306	int const dlLimit = _config->FindI("Acquire::https::Dl-Limit",
b9e9a44b	307	_config->FindI("Acquire::http::Dl-Limit",0))*1024;
d546f98d MV	308	if (dlLimit > 0)
	309	curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
	310
	311	// set header
9f542bae DK	312	curl_easy_setopt(curl, CURLOPT_USERAGENT,
	313	_config->Find("Acquire::https::User-Agent",
	314	_config->Find("Acquire::http::User-Agent",
335e2c82	315	"Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());
d546f98d	316
cc615257	317	// set timeout
46e39c8e	318	int const timeout = _config->FindI("Acquire::https::Timeout",
b9e9a44b	319	_config->FindI("Acquire::http::Timeout",120));
cc615257	320	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
43cf55db	321	//set really low lowspeed timeout (see #497983)
5085e660	322	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, DL_MIN_SPEED);
43cf55db	323	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);
cc615257	324
668ce84d	325	// set redirect options and default to 10 redirects
668ce84d MV	326	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
	327	curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);
	328
d546f98d	329	// debug
905fba60	330	if (Debug == true)
d546f98d MV	331	curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
d546f98d MV	332
714ee06c	333	// error handling
cc418115	334	curl_errorstr[0] = '\0';
714ee06c MV	335	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
714ee06c MV	336
6f4501f9	337	// If we ask for uncompressed files servers might respond with content-
1e3f4083	338	// negotiation which lets us end up with compressed files we do not support,
6f4501f9 DK	339	// see 657029, 657560 and co, so if we have no extension on the request
	340	// ask for text only. As a sidenote: If there is nothing to negotate servers
	341	// seem to be nice and ignore it.
	342	if (_config->FindB("Acquire::https::SendAccept", _config->FindB("Acquire::http::SendAccept", true)) == true)
	343	{
	344	size_t const filepos = Itm->Uri.find_last_of('/');
	345	string const file = Itm->Uri.substr(filepos + 1);
	346	if (flExtension(file) == file)
	347	headers = curl_slist_append(headers, "Accept: text/*");
	348	}
	349
d6039f9e	350	// if we have the file send an if-range query with a range header
4c499611 MV	351	if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
4c499611 MV	352	{
062074cb DK	353	std::string Buf;
	354	strprintf(Buf, "Range: bytes=%lli-", (long long) SBuf.st_size);
	355	headers = curl_slist_append(headers, Buf.c_str());
	356	strprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
	357	headers = curl_slist_append(headers, Buf.c_str());
8654fae9	358	}
d6039f9e MV	359	else if(Itm->LastModified > 0)
	360	{
	361	curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
	362	curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
4c499611	363	}
d546f98d MV	364
	365	// go for it - if the file exists, append on it
	366	File = new FileFd(Itm->DestFile, FileFd::WriteAny);
905fba60	367	Server = CreateServerState(Itm->Uri);
85050e76	368
d546f98d MV	369	// keep apt updated
	370	Res.Filename = Itm->DestFile;
	371
	372	// get it!
	373	CURLcode success = curl_easy_perform(curl);
d546f98d	374
1dea08eb MV	375	// If the server returns 200 OK but the If-Modified-Since condition is not
	376	// met, CURLINFO_CONDITION_UNMET will be set to 1
	377	long curl_condition_unmet = 0;
	378	curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &curl_condition_unmet);
	379
db1f1469	380	File->Close();
85050e76	381	curl_slist_free_all(headers);
db1f1469	382
d546f98d	383	// cleanup
85050e76	384	if (success != 0)
4c499611	385	{
9b5d79ec	386	_error->Error("%s", curl_errorstr);
85050e76 DK	387	return false;
	388	}
	389
	390	// server says file not modified
fd46d305	391	if (Server->Result == 304 \|\| curl_condition_unmet == 1)
85050e76 DK	392	{
	393	unlink(File->Name().c_str());
	394	Res.IMSHit = true;
	395	Res.LastModified = Itm->LastModified;
	396	Res.Size = 0;
	397	URIDone(Res);
d546f98d MV	398	return true;
d546f98d MV	399	}
fd46d305	400	Res.IMSHit = false;
d546f98d	401
fd46d305 DK	402	if (Server->Result != 200 && // OK
	403	Server->Result != 206 && // Partial
	404	Server->Result != 416) // invalid Range
85050e76 DK	405	{
85050e76 DK	406	char err[255];
fd46d305	407	snprintf(err, sizeof(err) - 1, "HttpError%i", Server->Result);
85050e76 DK	408	SetFailReason(err);
	409	_error->Error("%s", err);
	410	// unlink, no need keep 401/404 page content in partial/
	411	unlink(File->Name().c_str());
	412	return false;
	413	}
	414
85050e76	415	// invalid range-request
fd46d305	416	if (Server->Result == 416)
85050e76 DK	417	{
85050e76 DK	418	unlink(File->Name().c_str());
85050e76 DK	419	delete File;
	420	Redirect(Itm->Uri);
	421	return true;
5820530d OS	422	}
5820530d OS	423
27925d82 DK	424	struct stat resultStat;
	425	if (unlikely(stat(File->Name().c_str(), &resultStat) != 0))
	426	{
	427	_error->Errno("stat", "Unable to access file %s", File->Name().c_str());
	428	return false;
	429	}
	430	Res.Size = resultStat.st_size;
	431
85050e76 DK	432	// Timestamp
	433	curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
	434	if (Res.LastModified != -1)
	435	{
246bbb61	436	struct timeval times[2];
9ce3cfc9 DK	437	times[0].tv_sec = Res.LastModified;
9ce3cfc9 DK	438	times[1].tv_sec = Res.LastModified;
246bbb61 DK	439	times[0].tv_usec = times[1].tv_usec = 0;
246bbb61 DK	440	utimes(File->Name().c_str(), times);
85050e76 DK	441	}
	442	else
	443	Res.LastModified = resultStat.st_mtime;
d546f98d MV	444
	445	// take hashes
	446	Hashes Hash;
	447	FileFd Fd(Res.Filename, FileFd::ReadOnly);
109eb151	448	Hash.AddFD(Fd);
d546f98d	449	Res.TakeHashes(Hash);
85050e76	450
d546f98d MV	451	// keep apt updated
	452	URIDone(Res);
	453
	454	// cleanup
d546f98d	455	delete File;
d546f98d MV	456
d546f98d MV	457	return true;
d3e8fbb3	458	}
905fba60 DK	459	/}}}/
	460	// HttpsMethod::Configuration - Handle a configuration message /{{{/
	461	bool HttpsMethod::Configuration(string Message)
	462	{
	463	if (ServerMethod::Configuration(Message) == false)
	464	return false;
	465
	466	AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
	467	_config->FindB("Acquire::http::AllowRedirect", true));
	468	Debug = _config->FindB("Debug::Acquire::https",false);
	469
	470	return true;
	471	}
	472	/}}}/
	473	ServerState * HttpsMethod::CreateServerState(URI uri) /{{{/
	474	{
	475	return new HttpsServerState(uri, this);
	476	}
	477	/}}}/
d546f98d MV	478
	479	int main()
	480	{
	481	setlocale(LC_ALL, "");
	482
	483	HttpsMethod Mth;
	484	curl_global_init(CURL_GLOBAL_SSL) ;
	485
	486	return Mth.Run();
	487	}
	488