[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;
   HttpsMethod::FetchItem const * const Itm;
   CURLUserPointer(HttpsMethod * const https, HttpsMethod::FetchResult * const Res,
	 HttpsMethod::FetchItem const * const Itm) : https(https), Res(Res), Itm(Itm) {}
};

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)
      {
	 bool partialHit = false;
	 if (me->Itm->ExpectedHashes.usable() == true)
	 {
	    Hashes resultHashes(me->Itm->ExpectedHashes);
	    FileFd file(me->Itm->DestFile, FileFd::ReadOnly);
	    me->https->Server->Size = file.FileSize();
	    me->https->Server->Date = file.ModificationTime();
	    resultHashes.AddFD(file);
	    HashStringList const hashList = resultHashes.GetHashStringList();
	    partialHit = (me->Itm->ExpectedHashes == hashList);
	 }
	 else if (me->https->Server->Result == 416 && me->https->Server->Size == me->https->File->FileSize())
	    partialHit = true;

	 if (partialHit == true)
	 {
	    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;
      }
      else
	 me->https->Server->StartPos = 0;

      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)
      {
	 if (me->https->Server->JunkSize == 0 && me->Res->Size != 0 && me->Res->Size > me->Res->ResumePoint)
	    me->https->URIStart(*me->Res);
	 if (me->https->Server->AddPartialFileToHashes(*(me->https->File)) == false)
	    return 0;
      }
   }
   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;
      }
   }

   if (me->Server->GetHashes()->Add((unsigned char const * const)buffer, buffer_size) == false)
      return 0;

   return buffer_size;
}

// HttpsServerState::HttpsServerState - Constructor			/*{{{*/
HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * Owner) : ServerState(Srv, Owner), Hash(NULL)
{
   TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
   Reset();
}
									/*}}}*/
bool HttpsServerState::InitHashes(HashStringList const &ExpectedHashes)	/*{{{*/
{
   delete Hash;
   Hash = new Hashes(ExpectedHashes);
   return true;
}
									/*}}}*/
APT_PURE Hashes * HttpsServerState::GetHashes()				/*{{{*/
{
   return Hash;
}
									/*}}}*/

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, Itm);
   // 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);
   if (Server->InitHashes(Itm->ExpectedHashes) == false)
      return false;

   // 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
   Res.TakeHashes(*(Server->GetHashes()));

   // 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;
dcbb364f DK	43	HttpsMethod::FetchItem const * const Itm;
	44	CURLUserPointer(HttpsMethod * const https, HttpsMethod::FetchResult * const Res,
	45	HttpsMethod::FetchItem const * const Itm) : https(https), Res(Res), Itm(Itm) {}
27925d82 DK	46	};
27925d82 DK	47
fd46d305 DK	48	size_t
	49	HttpsMethod::parse_header(void buffer, size_t size, size_t nmemb, void userp)
	50	{
	51	size_t len = size * nmemb;
27925d82	52	CURLUserPointer me = (CURLUserPointer )userp;
fd46d305 DK	53	std::string line((char*) buffer, len);
	54	for (--len; len > 0; --len)
	55	if (isspace(line[len]) == 0)
	56	{
	57	++len;
	58	break;
	59	}
	60	line.erase(len);
	61
	62	if (line.empty() == true)
	63	{
27925d82	64	if (me->https->Server->Result != 416 && me->https->Server->StartPos != 0)
fd46d305	65	;
dcbb364f	66	else if (me->https->Server->Result == 416)
fd46d305	67	{
dcbb364f DK	68	bool partialHit = false;
	69	if (me->Itm->ExpectedHashes.usable() == true)
	70	{
	71	Hashes resultHashes(me->Itm->ExpectedHashes);
	72	FileFd file(me->Itm->DestFile, FileFd::ReadOnly);
	73	me->https->Server->Size = file.FileSize();
	74	me->https->Server->Date = file.ModificationTime();
	75	resultHashes.AddFD(file);
	76	HashStringList const hashList = resultHashes.GetHashStringList();
	77	partialHit = (me->Itm->ExpectedHashes == hashList);
	78	}
	79	else if (me->https->Server->Result == 416 && me->https->Server->Size == me->https->File->FileSize())
	80	partialHit = true;
	81
	82	if (partialHit == true)
	83	{
	84	me->https->Server->Result = 200;
	85	me->https->Server->StartPos = me->https->Server->Size;
	86	// the actual size is not important for https as curl will deal with it
	87	// by itself and e.g. doesn't bother us with transport-encoding…
	88	me->https->Server->JunkSize = std::numeric_limits<unsigned long long>::max();
	89	}
	90	else
	91	me->https->Server->StartPos = 0;
fd46d305 DK	92	}
fd46d305 DK	93	else
27925d82 DK	94	me->https->Server->StartPos = 0;
27925d82 DK	95
27925d82 DK	96	me->Res->LastModified = me->https->Server->Date;
	97	me->Res->Size = me->https->Server->Size;
	98	me->Res->ResumePoint = me->https->Server->StartPos;
fd46d305	99
27925d82	100	// we expect valid data, so tell our caller we get the file now
34faa8f7 DK	101	if (me->https->Server->Result >= 200 && me->https->Server->Result < 300)
	102	{
	103	if (me->https->Server->JunkSize == 0 && me->Res->Size != 0 && me->Res->Size > me->Res->ResumePoint)
	104	me->https->URIStart(*me->Res);
	105	if (me->https->Server->AddPartialFileToHashes(*(me->https->File)) == false)
	106	return 0;
	107	}
fd46d305	108	}
27925d82	109	else if (me->https->Server->HeaderLine(line) == false)
fd46d305 DK	110	return 0;
	111
	112	return size*nmemb;
	113	}
	114
d546f98d MV	115	size_t
	116	HttpsMethod::write_data(void buffer, size_t size, size_t nmemb, void userp)
	117	{
	118	HttpsMethod me = (HttpsMethod )userp;
ed793a19 DK	119	size_t buffer_size = size * nmemb;
	120	// we don't need to count the junk here, just drop anything we get as
	121	// we don't always know how long it would be, e.g. in chunked encoding.
	122	if (me->Server->JunkSize != 0)
	123	return buffer_size;
d546f98d	124
ed793a19	125	if(me->File->Write(buffer, buffer_size) != true)
d61960d9	126	return 0;
d546f98d	127
d61960d9	128	if(me->Queue->MaximumSize > 0)
ee279506	129	{
d61960d9 DK	130	unsigned long long const TotalWritten = me->File->Tell();
	131	if (TotalWritten > me->Queue->MaximumSize)
	132	{
	133	me->SetFailReason("MaximumSizeExceeded");
	134	_error->Error("Writing more data than expected (%llu > %llu)",
	135	TotalWritten, me->Queue->MaximumSize);
	136	return 0;
	137	}
ee279506	138	}
d546f98d	139
34faa8f7 DK	140	if (me->Server->GetHashes()->Add((unsigned char const * const)buffer, buffer_size) == false)
	141	return 0;
	142
ed793a19	143	return buffer_size;
d546f98d MV	144	}
d546f98d MV	145
fd46d305	146	// HttpsServerState::HttpsServerState - Constructor /{{{/
34faa8f7	147	HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * Owner) : ServerState(Srv, Owner), Hash(NULL)
fd46d305 DK	148	{
	149	TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
	150	Reset();
	151	}
	152	/}}}/
34faa8f7 DK	153	bool HttpsServerState::InitHashes(HashStringList const &ExpectedHashes) /{{{/
	154	{
	155	delete Hash;
	156	Hash = new Hashes(ExpectedHashes);
	157	return true;
	158	}
	159	/}}}/
	160	APT_PURE Hashes * HttpsServerState::GetHashes() /{{{/
	161	{
	162	return Hash;
	163	}
	164	/}}}/
fd46d305	165
27925d82	166	void HttpsMethod::SetupProxy() /{{{/
d546f98d MV	167	{
	168	URI ServerName = Queue->Uri;
	169
c6ee61ea MV	170	// Determine the proxy setting
	171	AutoDetectProxy(ServerName);
	172
5b63d2a9 MV	173	// Curl should never read proxy settings from the environment, as
	174	// we determine which proxy to use. Do this for consistency among
	175	// methods and prevent an environment variable overriding a
	176	// no-proxy ("DIRECT") setting in apt.conf.
	177	curl_easy_setopt(curl, CURLOPT_PROXY, "");
	178
4407a02f MV	179	// Determine the proxy setting - try https first, fallback to http and use env at last
	180	string UseProxy = _config->Find("Acquire::https::Proxy::" + ServerName.Host,
	181	_config->Find("Acquire::http::Proxy::" + ServerName.Host).c_str());
	182
	183	if (UseProxy.empty() == true)
	184	UseProxy = _config->Find("Acquire::https::Proxy", _config->Find("Acquire::http::Proxy").c_str());
	185
	186	// User want to use NO proxy, so nothing to setup
	187	if (UseProxy == "DIRECT")
	188	return;
	189
	190	if (UseProxy.empty() == false)
d546f98d	191	{
4407a02f MV	192	// Parse no_proxy, a comma (,) separated list of domains we don't want to use
	193	// a proxy for so we stop right here if it is in the list
	194	if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
	195	return;
	196	} else {
5b63d2a9 MV	197	const char* result = getenv("https_proxy");
	198	// FIXME: Fall back to http_proxy is to remain compatible with
	199	// existing setups and behaviour of apt.conf. This should be
	200	// deprecated in the future (including apt.conf). Most other
	201	// programs do not fall back to http proxy settings and neither
	202	// should Apt.
	203	if (result == NULL)
	204	result = getenv("http_proxy");
4407a02f	205	UseProxy = result == NULL ? "" : result;
d546f98d	206	}
4407a02f	207
d546f98d	208	// Determine what host and port to use based on the proxy settings
4407a02f	209	if (UseProxy.empty() == false)
d546f98d	210	{
4407a02f MV	211	Proxy = UseProxy;
4407a02f MV	212	if (Proxy.Port != 1)
d546f98d MV	213	curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
d546f98d MV	214	curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
5b63d2a9 MV	215	if (Proxy.User.empty() == false \|\| Proxy.Password.empty() == false)
	216	{
	217	curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, Proxy.User.c_str());
	218	curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, Proxy.Password.c_str());
	219	}
d546f98d	220	}
b9e9a44b	221	} /}}}/
d546f98d MV	222	// HttpsMethod::Fetch - Fetch an item /{{{/
	223	// ---------------------------------------------------------------------
	224	/* This adds an item to the pipeline. We keep the pipeline at a fixed
	225	depth. */
	226	bool HttpsMethod::Fetch(FetchItem *Itm)
	227	{
d546f98d	228	struct stat SBuf;
d61960d9	229	struct curl_slist *headers=NULL;
714ee06c	230	char curl_errorstr[CURL_ERROR_SIZE];
c769cd6f MV	231	URI Uri = Itm->Uri;
c769cd6f MV	232	string remotehost = Uri.Host;
d546f98d MV	233
d546f98d MV	234	// TODO:
d546f98d MV	235	// - http::Pipeline-Depth
	236	// - error checking/reporting
	237	// - more debug options? (CURLOPT_DEBUGFUNCTION?)
	238
5820530d	239	curl_easy_reset(curl);
d546f98d MV	240	SetupProxy();
d546f98d MV	241
1de1f703	242	maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
592b7800	243
27925d82	244	FetchResult Res;
dcbb364f	245	CURLUserPointer userp(this, &Res, Itm);
d546f98d	246	// callbacks
01fc8930	247	curl_easy_setopt(curl, CURLOPT_URL, static_cast<string>(Uri).c_str());
fd46d305	248	curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_header);
27925d82	249	curl_easy_setopt(curl, CURLOPT_WRITEHEADER, &userp);
d546f98d MV	250	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
d546f98d MV	251	curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
dc95fee1	252	// options
27925d82	253	curl_easy_setopt(curl, CURLOPT_NOPROGRESS, true);
5820530d	254	curl_easy_setopt(curl, CURLOPT_FILETIME, true);
889b0072 DK	255	// only allow curl to handle https, not the other stuff it supports
889b0072 DK	256	curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
dc95fee1	257	curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
d546f98d	258
c769cd6f MV	259	// SSL parameters are set by default to the common (non mirror-specific) value
	260	// if available (or a default one) and gets overload by mirror-specific ones.
	261
	262	// File containing the list of trusted CA.
	263	string cainfo = _config->Find("Acquire::https::CaInfo","");
	264	string knob = "Acquire::https::"+remotehost+"::CaInfo";
	265	cainfo = _config->Find(knob.c_str(),cainfo.c_str());
46e39c8e	266	if(cainfo.empty() == false)
c769cd6f MV	267	curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());
	268
	269	// Check server certificate against previous CA list ...
	270	bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
	271	knob = "Acquire::https::" + remotehost + "::Verify-Peer";
	272	peer_verify = _config->FindB(knob.c_str(), peer_verify);
714ee06c MV	273	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
714ee06c MV	274
c769cd6f	275	// ... and hostname against cert CN or subjectAltName
c769cd6f MV	276	bool verify = _config->FindB("Acquire::https::Verify-Host",true);
	277	knob = "Acquire::https::"+remotehost+"::Verify-Host";
	278	verify = _config->FindB(knob.c_str(),verify);
52b22cea DK	279	int const default_verify = (verify == true) ? 2 : 0;
52b22cea DK	280	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, default_verify);
c769cd6f	281
46e39c8e MV	282	// Also enforce issuer of server certificate using its cert
	283	string issuercert = _config->Find("Acquire::https::IssuerCert","");
	284	knob = "Acquire::https::"+remotehost+"::IssuerCert";
	285	issuercert = _config->Find(knob.c_str(),issuercert.c_str());
	286	if(issuercert.empty() == false)
	287	curl_easy_setopt(curl, CURLOPT_ISSUERCERT,issuercert.c_str());
	288
c769cd6f	289	// For client authentication, certificate file ...
714ee06c	290	string pem = _config->Find("Acquire::https::SslCert","");
c769cd6f MV	291	knob = "Acquire::https::"+remotehost+"::SslCert";
c769cd6f MV	292	pem = _config->Find(knob.c_str(),pem.c_str());
46e39c8e	293	if(pem.empty() == false)
714ee06c	294	curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
c769cd6f MV	295
	296	// ... and associated key.
	297	string key = _config->Find("Acquire::https::SslKey","");
	298	knob = "Acquire::https::"+remotehost+"::SslKey";
	299	key = _config->Find(knob.c_str(),key.c_str());
46e39c8e	300	if(key.empty() == false)
c769cd6f MV	301	curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());
	302
	303	// Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
	304	// supported by GnuTLS).
	305	long final_version = CURL_SSLVERSION_DEFAULT;
	306	string sslversion = _config->Find("Acquire::https::SslForceVersion","");
	307	knob = "Acquire::https::"+remotehost+"::SslForceVersion";
	308	sslversion = _config->Find(knob.c_str(),sslversion.c_str());
	309	if(sslversion == "TLSv1")
	310	final_version = CURL_SSLVERSION_TLSv1;
	311	else if(sslversion == "SSLv3")
	312	final_version = CURL_SSLVERSION_SSLv3;
	313	curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);
d546f98d	314
46e39c8e MV	315	// CRL file
	316	string crlfile = _config->Find("Acquire::https::CrlFile","");
	317	knob = "Acquire::https::"+remotehost+"::CrlFile";
	318	crlfile = _config->Find(knob.c_str(),crlfile.c_str());
	319	if(crlfile.empty() == false)
	320	curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str());
	321
d546f98d	322	// cache-control
b9e9a44b DK	323	if(_config->FindB("Acquire::https::No-Cache",
b9e9a44b DK	324	_config->FindB("Acquire::http::No-Cache",false)) == false)
d546f98d MV	325	{
d546f98d MV	326	// cache enabled
b9e9a44b DK	327	if (_config->FindB("Acquire::https::No-Store",
b9e9a44b DK	328	_config->FindB("Acquire::http::No-Store",false)) == true)
d546f98d	329	headers = curl_slist_append(headers,"Cache-Control: no-store");
8654fae9	330	stringstream ss;
b9e9a44b DK	331	ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::https::Max-Age",
b9e9a44b DK	332	_config->FindI("Acquire::http::Max-Age",0)));
d546f98d MV	333	headers = curl_slist_append(headers, ss.str().c_str());
	334	} else {
	335	// cache disabled by user
	336	headers = curl_slist_append(headers, "Cache-Control: no-cache");
	337	headers = curl_slist_append(headers, "Pragma: no-cache");
	338	}
	339	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
	340
d546f98d	341	// speed limit
46e39c8e	342	int const dlLimit = _config->FindI("Acquire::https::Dl-Limit",
b9e9a44b	343	_config->FindI("Acquire::http::Dl-Limit",0))*1024;
d546f98d MV	344	if (dlLimit > 0)
	345	curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
	346
	347	// set header
9f542bae DK	348	curl_easy_setopt(curl, CURLOPT_USERAGENT,
	349	_config->Find("Acquire::https::User-Agent",
	350	_config->Find("Acquire::http::User-Agent",
335e2c82	351	"Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());
d546f98d	352
cc615257	353	// set timeout
46e39c8e	354	int const timeout = _config->FindI("Acquire::https::Timeout",
b9e9a44b	355	_config->FindI("Acquire::http::Timeout",120));
cc615257	356	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
43cf55db	357	//set really low lowspeed timeout (see #497983)
5085e660	358	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, DL_MIN_SPEED);
43cf55db	359	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);
cc615257	360
668ce84d	361	// set redirect options and default to 10 redirects
668ce84d MV	362	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
	363	curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);
	364
d546f98d	365	// debug
905fba60	366	if (Debug == true)
d546f98d MV	367	curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
d546f98d MV	368
714ee06c	369	// error handling
cc418115	370	curl_errorstr[0] = '\0';
714ee06c MV	371	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
714ee06c MV	372
6f4501f9	373	// If we ask for uncompressed files servers might respond with content-
1e3f4083	374	// negotiation which lets us end up with compressed files we do not support,
6f4501f9 DK	375	// see 657029, 657560 and co, so if we have no extension on the request
	376	// ask for text only. As a sidenote: If there is nothing to negotate servers
	377	// seem to be nice and ignore it.
	378	if (_config->FindB("Acquire::https::SendAccept", _config->FindB("Acquire::http::SendAccept", true)) == true)
	379	{
	380	size_t const filepos = Itm->Uri.find_last_of('/');
	381	string const file = Itm->Uri.substr(filepos + 1);
	382	if (flExtension(file) == file)
	383	headers = curl_slist_append(headers, "Accept: text/*");
	384	}
	385
d6039f9e	386	// if we have the file send an if-range query with a range header
4c499611 MV	387	if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
4c499611 MV	388	{
062074cb DK	389	std::string Buf;
	390	strprintf(Buf, "Range: bytes=%lli-", (long long) SBuf.st_size);
	391	headers = curl_slist_append(headers, Buf.c_str());
	392	strprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
	393	headers = curl_slist_append(headers, Buf.c_str());
8654fae9	394	}
d6039f9e MV	395	else if(Itm->LastModified > 0)
	396	{
	397	curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
	398	curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
4c499611	399	}
d546f98d MV	400
	401	// go for it - if the file exists, append on it
	402	File = new FileFd(Itm->DestFile, FileFd::WriteAny);
905fba60	403	Server = CreateServerState(Itm->Uri);
34faa8f7 DK	404	if (Server->InitHashes(Itm->ExpectedHashes) == false)
34faa8f7 DK	405	return false;
85050e76	406
d546f98d MV	407	// keep apt updated
	408	Res.Filename = Itm->DestFile;
	409
	410	// get it!
	411	CURLcode success = curl_easy_perform(curl);
d546f98d	412
1dea08eb MV	413	// If the server returns 200 OK but the If-Modified-Since condition is not
	414	// met, CURLINFO_CONDITION_UNMET will be set to 1
	415	long curl_condition_unmet = 0;
	416	curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &curl_condition_unmet);
	417
db1f1469	418	File->Close();
85050e76	419	curl_slist_free_all(headers);
db1f1469	420
d546f98d	421	// cleanup
85050e76	422	if (success != 0)
4c499611	423	{
9b5d79ec	424	_error->Error("%s", curl_errorstr);
85050e76 DK	425	return false;
	426	}
	427
	428	// server says file not modified
fd46d305	429	if (Server->Result == 304 \|\| curl_condition_unmet == 1)
85050e76 DK	430	{
	431	unlink(File->Name().c_str());
	432	Res.IMSHit = true;
	433	Res.LastModified = Itm->LastModified;
	434	Res.Size = 0;
	435	URIDone(Res);
d546f98d MV	436	return true;
d546f98d MV	437	}
fd46d305	438	Res.IMSHit = false;
d546f98d	439
fd46d305 DK	440	if (Server->Result != 200 && // OK
	441	Server->Result != 206 && // Partial
	442	Server->Result != 416) // invalid Range
85050e76 DK	443	{
85050e76 DK	444	char err[255];
fd46d305	445	snprintf(err, sizeof(err) - 1, "HttpError%i", Server->Result);
85050e76 DK	446	SetFailReason(err);
	447	_error->Error("%s", err);
	448	// unlink, no need keep 401/404 page content in partial/
	449	unlink(File->Name().c_str());
	450	return false;
	451	}
	452
85050e76	453	// invalid range-request
fd46d305	454	if (Server->Result == 416)
85050e76 DK	455	{
85050e76 DK	456	unlink(File->Name().c_str());
85050e76 DK	457	delete File;
	458	Redirect(Itm->Uri);
	459	return true;
5820530d OS	460	}
5820530d OS	461
27925d82 DK	462	struct stat resultStat;
	463	if (unlikely(stat(File->Name().c_str(), &resultStat) != 0))
	464	{
	465	_error->Errno("stat", "Unable to access file %s", File->Name().c_str());
	466	return false;
	467	}
	468	Res.Size = resultStat.st_size;
	469
85050e76 DK	470	// Timestamp
	471	curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
	472	if (Res.LastModified != -1)
	473	{
246bbb61	474	struct timeval times[2];
9ce3cfc9 DK	475	times[0].tv_sec = Res.LastModified;
9ce3cfc9 DK	476	times[1].tv_sec = Res.LastModified;
246bbb61 DK	477	times[0].tv_usec = times[1].tv_usec = 0;
246bbb61 DK	478	utimes(File->Name().c_str(), times);
85050e76 DK	479	}
	480	else
	481	Res.LastModified = resultStat.st_mtime;
d546f98d MV	482
d546f98d MV	483	// take hashes
34faa8f7	484	Res.TakeHashes(*(Server->GetHashes()));
85050e76	485
d546f98d MV	486	// keep apt updated
	487	URIDone(Res);
	488
	489	// cleanup
d546f98d	490	delete File;
d546f98d MV	491
d546f98d MV	492	return true;
d3e8fbb3	493	}
905fba60 DK	494	/}}}/
	495	// HttpsMethod::Configuration - Handle a configuration message /{{{/
	496	bool HttpsMethod::Configuration(string Message)
	497	{
	498	if (ServerMethod::Configuration(Message) == false)
	499	return false;
	500
	501	AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
	502	_config->FindB("Acquire::http::AllowRedirect", true));
	503	Debug = _config->FindB("Debug::Acquire::https",false);
	504
	505	return true;
	506	}
	507	/}}}/
	508	ServerState * HttpsMethod::CreateServerState(URI uri) /{{{/
	509	{
	510	return new HttpsServerState(uri, this);
	511	}
	512	/}}}/
d546f98d MV	513
	514	int main()
	515	{
	516	setlocale(LC_ALL, "");
	517
	518	HttpsMethod Mth;
	519	curl_global_init(CURL_GLOBAL_SSL) ;
	520
	521	return Mth.Run();
	522	}
	523