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