[apt.git] / methods / https.cc

//-*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
/* ######################################################################

   HTTPS Acquire Method - This is the HTTPS acquire method for APT.
   
   It uses libcurl

   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include <config.h>

#include <apt-pkg/fileutl.h>
#include <apt-pkg/acquire-method.h>
#include <apt-pkg/error.h>
#include <apt-pkg/hashes.h>
#include <apt-pkg/netrc.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/macros.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/proxy.h>

#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
#include <stdio.h>
#include <iostream>
#include <sstream>
#include <ctype.h>
#include <stdlib.h>

#include "https.h"

#include <apti18n.h>
									/*}}}*/
using namespace std;

size_t
HttpsMethod::parse_header(void *buffer, size_t size, size_t nmemb, void *userp)
{
   size_t len = size * nmemb;
   HttpsMethod *me = (HttpsMethod *)userp;
   std::string line((char*) buffer, len);
   for (--len; len > 0; --len)
      if (isspace(line[len]) == 0)
      {
	 ++len;
	 break;
      }
   line.erase(len);

   if (line.empty() == true)
   {
      if (me->Server->Result != 416 && me->Server->StartPos != 0)
	 ;
      else if (me->Server->Result == 416 && me->Server->Size == me->File->FileSize())
      {
         me->Server->Result = 200;
	 me->Server->StartPos = me->Server->Size;
      }
      else
	 me->Server->StartPos = 0;

      me->File->Truncate(me->Server->StartPos);
      me->File->Seek(me->Server->StartPos);
   }
   else if (me->Server->HeaderLine(line) == false)
      return 0;

   return size*nmemb;
}

size_t 
HttpsMethod::write_data(void *buffer, size_t size, size_t nmemb, void *userp)
{
   HttpsMethod *me = (HttpsMethod *)userp;

   if (me->Res.Size == 0)
      me->URIStart(me->Res);
   if(me->File->Write(buffer, size*nmemb) != true)
      return false;

   return size*nmemb;
}

int
HttpsMethod::progress_callback(void *clientp, double dltotal, double /*dlnow*/,
			      double /*ultotal*/, double /*ulnow*/)
{
   HttpsMethod *me = (HttpsMethod *)clientp;
   if(dltotal > 0 && me->Res.Size == 0) {
      me->Res.Size = (unsigned long long)dltotal;
   }
   return 0;
}

// HttpsServerState::HttpsServerState - Constructor			/*{{{*/
HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * /*Owner*/) : ServerState(Srv, NULL)
{
   TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
   Reset();
}
									/*}}}*/

void HttpsMethod::SetupProxy()  					/*{{{*/
{
   URI ServerName = Queue->Uri;

   // 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"));

   // callbacks
   curl_easy_setopt(curl, CURLOPT_URL, static_cast<string>(Uri).c_str());
   curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_header);
   curl_easy_setopt(curl, CURLOPT_WRITEHEADER, this);
   curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
   curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
   curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
   curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
   // options
   curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
   curl_easy_setopt(curl, CURLOPT_FILETIME, true);
   // only allow curl to handle https, not the other stuff it supports
   curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
   curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);

   // SSL parameters are set by default to the common (non mirror-specific) value
   // if available (or a default one) and gets overload by mirror-specific ones.

   // File containing the list of trusted CA.
   string cainfo = _config->Find("Acquire::https::CaInfo","");
   string knob = "Acquire::https::"+remotehost+"::CaInfo";
   cainfo = _config->Find(knob.c_str(),cainfo.c_str());
   if(cainfo.empty() == false)
      curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());

   // Check server certificate against previous CA list ...
   bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
   knob = "Acquire::https::" + remotehost + "::Verify-Peer";
   peer_verify = _config->FindB(knob.c_str(), peer_verify);
   curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);

   // ... and hostname against cert CN or subjectAltName
   bool verify = _config->FindB("Acquire::https::Verify-Host",true);
   knob = "Acquire::https::"+remotehost+"::Verify-Host";
   verify = _config->FindB(knob.c_str(),verify);
   int const default_verify = (verify == true) ? 2 : 0;
   curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, default_verify);

   // Also enforce issuer of server certificate using its cert
   string issuercert = _config->Find("Acquire::https::IssuerCert","");
   knob = "Acquire::https::"+remotehost+"::IssuerCert";
   issuercert = _config->Find(knob.c_str(),issuercert.c_str());
   if(issuercert.empty() == false)
      curl_easy_setopt(curl, CURLOPT_ISSUERCERT,issuercert.c_str());

   // For client authentication, certificate file ...
   string pem = _config->Find("Acquire::https::SslCert","");
   knob = "Acquire::https::"+remotehost+"::SslCert";
   pem = _config->Find(knob.c_str(),pem.c_str());
   if(pem.empty() == false)
      curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());

   // ... and associated key.
   string key = _config->Find("Acquire::https::SslKey","");
   knob = "Acquire::https::"+remotehost+"::SslKey";
   key = _config->Find(knob.c_str(),key.c_str());
   if(key.empty() == false)
      curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());

   // Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
   // supported by GnuTLS).
   long final_version = CURL_SSLVERSION_DEFAULT;
   string sslversion = _config->Find("Acquire::https::SslForceVersion","");
   knob = "Acquire::https::"+remotehost+"::SslForceVersion";
   sslversion = _config->Find(knob.c_str(),sslversion.c_str());
   if(sslversion == "TLSv1")
     final_version = CURL_SSLVERSION_TLSv1;
   else if(sslversion == "SSLv3")
     final_version = CURL_SSLVERSION_SSLv3;
   curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);

   // CRL file
   string crlfile = _config->Find("Acquire::https::CrlFile","");
   knob = "Acquire::https::"+remotehost+"::CrlFile";
   crlfile = _config->Find(knob.c_str(),crlfile.c_str());
   if(crlfile.empty() == false)
      curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str());

   // cache-control
   if(_config->FindB("Acquire::https::No-Cache",
	_config->FindB("Acquire::http::No-Cache",false)) == false)
   {
      // cache enabled
      if (_config->FindB("Acquire::https::No-Store",
		_config->FindB("Acquire::http::No-Store",false)) == true)
	 headers = curl_slist_append(headers,"Cache-Control: no-store");
      stringstream ss;
      ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::https::Max-Age",
		_config->FindI("Acquire::http::Max-Age",0)));
      headers = curl_slist_append(headers, ss.str().c_str());
   } else {
      // cache disabled by user
      headers = curl_slist_append(headers, "Cache-Control: no-cache");
      headers = curl_slist_append(headers, "Pragma: no-cache");
   }
   curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);

   // speed limit
   int const dlLimit = _config->FindI("Acquire::https::Dl-Limit",
		_config->FindI("Acquire::http::Dl-Limit",0))*1024;
   if (dlLimit > 0)
      curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);

   // set header
   curl_easy_setopt(curl, CURLOPT_USERAGENT,
	_config->Find("Acquire::https::User-Agent",
		_config->Find("Acquire::http::User-Agent",
			"Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());

   // set timeout
   int const timeout = _config->FindI("Acquire::https::Timeout",
		_config->FindI("Acquire::http::Timeout",120));
   curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
   //set really low lowspeed timeout (see #497983)
   curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, DL_MIN_SPEED);
   curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);

   // set redirect options and default to 10 redirects
   bool const AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
	_config->FindB("Acquire::http::AllowRedirect",true));
   curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
   curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);

   // debug
   if(_config->FindB("Debug::Acquire::https", false))
      curl_easy_setopt(curl, CURLOPT_VERBOSE, true);

   // error handling
   curl_errorstr[0] = '\0';
   curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);

   // If we ask for uncompressed files servers might respond with content-
   // negotiation which lets us end up with compressed files we do not support,
   // see 657029, 657560 and co, so if we have no extension on the request
   // ask for text only. As a sidenote: If there is nothing to negotate servers
   // seem to be nice and ignore it.
   if (_config->FindB("Acquire::https::SendAccept", _config->FindB("Acquire::http::SendAccept", true)) == true)
   {
      size_t const filepos = Itm->Uri.find_last_of('/');
      string const file = Itm->Uri.substr(filepos + 1);
      if (flExtension(file) == file)
	 headers = curl_slist_append(headers, "Accept: text/*");
   }

   // if we have the file send an if-range query with a range header
   if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
   {
      std::string Buf;
      strprintf(Buf, "Range: bytes=%lli-", (long long) SBuf.st_size);
      headers = curl_slist_append(headers, Buf.c_str());
      strprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
      headers = curl_slist_append(headers, Buf.c_str());
   }
   else if(Itm->LastModified > 0)
   {
      curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
      curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
   }

   // go for it - if the file exists, append on it
   File = new FileFd(Itm->DestFile, FileFd::WriteAny);
   Server = new HttpsServerState(Itm->Uri, this);

   // keep apt updated
   Res.Filename = Itm->DestFile;

   // get it!
   CURLcode success = curl_easy_perform(curl);

   // If the server returns 200 OK but the If-Modified-Since condition is not
   // met, CURLINFO_CONDITION_UNMET will be set to 1
   long curl_condition_unmet = 0;
   curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &curl_condition_unmet);

   File->Close();
   curl_slist_free_all(headers);

   // cleanup
   if (success != 0)
   {
      _error->Error("%s", curl_errorstr);
      unlink(File->Name().c_str());
      return false;
   }

   // server says file not modified
   if (Server->Result == 304 || curl_condition_unmet == 1)
   {
      unlink(File->Name().c_str());
      Res.IMSHit = true;
      Res.LastModified = Itm->LastModified;
      Res.Size = 0;
      URIDone(Res);
      return true;
   }
   Res.IMSHit = false;

   if (Server->Result != 200 && // OK
	 Server->Result != 206 && // Partial
	 Server->Result != 416) // invalid Range
   {
      char err[255];
      snprintf(err, sizeof(err) - 1, "HttpError%i", Server->Result);
      SetFailReason(err);
      _error->Error("%s", err);
      // unlink, no need keep 401/404 page content in partial/
      unlink(File->Name().c_str());
      return false;
   }

   struct stat resultStat;
   if (unlikely(stat(File->Name().c_str(), &resultStat) != 0))
   {
      _error->Errno("stat", "Unable to access file %s", File->Name().c_str());
      return false;
   }
   Res.Size = resultStat.st_size;

   // invalid range-request
   if (Server->Result == 416)
   {
      unlink(File->Name().c_str());
      Res.Size = 0;
      delete File;
      Redirect(Itm->Uri);
      return true;
   }

   // Timestamp
   curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
   if (Res.LastModified != -1)
   {
      struct timeval times[2];
      times[0].tv_sec = Res.LastModified;
      times[1].tv_sec = Res.LastModified;
      times[0].tv_usec = times[1].tv_usec = 0;
      utimes(File->Name().c_str(), times);
   }
   else
      Res.LastModified = resultStat.st_mtime;

   // take hashes
   Hashes Hash;
   FileFd Fd(Res.Filename, FileFd::ReadOnly);
   Hash.AddFD(Fd);
   Res.TakeHashes(Hash);

   // keep apt updated
   URIDone(Res);

   // cleanup
   Res.Size = 0;
   delete File;

   return true;
}

int main()
{
   setlocale(LC_ALL, "");

   DropPrivs();

   HttpsMethod Mth;
   curl_global_init(CURL_GLOBAL_SSL) ;

   return Mth.Run();
}
Commit	Line	Data
b9e9a44b	1	//-- mode: cpp; mode: fold --
d546f98d MV	2	// Description /{{{/
	3	// $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
	4	/* ######################################################################
	5
1e3f4083	6	HTTPS Acquire Method - This is the HTTPS acquire method for APT.
d546f98d MV	7
	8	It uses libcurl
	9
	10	##################################################################### */
	11	/}}}/
	12	// Include Files /{{{/
ea542140 DK	13	#include <config.h>
ea542140 DK	14
d546f98d MV	15	#include <apt-pkg/fileutl.h>
	16	#include <apt-pkg/acquire-method.h>
	17	#include <apt-pkg/error.h>
	18	#include <apt-pkg/hashes.h>
592b7800	19	#include <apt-pkg/netrc.h>
472ff00e	20	#include <apt-pkg/configuration.h>
453b82a3 DK	21	#include <apt-pkg/macros.h>
453b82a3 DK	22	#include <apt-pkg/strutl.h>
c6ee61ea	23	#include <apt-pkg/proxy.h>
d546f98d MV	24
	25	#include <sys/stat.h>
	26	#include <sys/time.h>
d546f98d	27	#include <unistd.h>
d546f98d	28	#include <stdio.h>
d546f98d	29	#include <iostream>
d546f98d	30	#include <sstream>
453b82a3 DK	31	#include <ctype.h>
453b82a3 DK	32	#include <stdlib.h>
d546f98d	33
d546f98d	34	#include "https.h"
453b82a3	35
ea542140	36	#include <apti18n.h>
d546f98d MV	37	/}}}/
	38	using namespace std;
	39
fd46d305 DK	40	size_t
	41	HttpsMethod::parse_header(void buffer, size_t size, size_t nmemb, void userp)
	42	{
	43	size_t len = size * nmemb;
	44	HttpsMethod me = (HttpsMethod )userp;
	45	std::string line((char*) buffer, len);
	46	for (--len; len > 0; --len)
	47	if (isspace(line[len]) == 0)
	48	{
	49	++len;
	50	break;
	51	}
	52	line.erase(len);
	53
	54	if (line.empty() == true)
	55	{
	56	if (me->Server->Result != 416 && me->Server->StartPos != 0)
	57	;
	58	else if (me->Server->Result == 416 && me->Server->Size == me->File->FileSize())
	59	{
	60	me->Server->Result = 200;
	61	me->Server->StartPos = me->Server->Size;
	62	}
	63	else
	64	me->Server->StartPos = 0;
	65
	66	me->File->Truncate(me->Server->StartPos);
	67	me->File->Seek(me->Server->StartPos);
	68	}
	69	else if (me->Server->HeaderLine(line) == false)
	70	return 0;
	71
	72	return size*nmemb;
	73	}
	74
d546f98d MV	75	size_t
	76	HttpsMethod::write_data(void buffer, size_t size, size_t nmemb, void userp)
	77	{
	78	HttpsMethod me = (HttpsMethod )userp;
	79
f9b4f12d DK	80	if (me->Res.Size == 0)
f9b4f12d DK	81	me->URIStart(me->Res);
d546f98d MV	82	if(me->File->Write(buffer, size*nmemb) != true)
	83	return false;
	84
	85	return size*nmemb;
	86	}
	87
65512241 DK	88	int
	89	HttpsMethod::progress_callback(void clientp, double dltotal, double /dlnow*/,
	90	double /ultotal/, double /ulnow/)
d546f98d MV	91	{
	92	HttpsMethod me = (HttpsMethod )clientp;
	93	if(dltotal > 0 && me->Res.Size == 0) {
650faab0	94	me->Res.Size = (unsigned long long)dltotal;
d546f98d MV	95	}
	96	return 0;
	97	}
	98
fd46d305	99	// HttpsServerState::HttpsServerState - Constructor /{{{/
65512241	100	HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * /Owner/) : ServerState(Srv, NULL)
fd46d305 DK	101	{
	102	TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
	103	Reset();
	104	}
	105	/}}}/
	106
4407a02f	107	void HttpsMethod::SetupProxy() /{{{/
d546f98d MV	108	{
	109	URI ServerName = Queue->Uri;
	110
c6ee61ea MV	111	// Determine the proxy setting
	112	AutoDetectProxy(ServerName);
	113
5b63d2a9 MV	114	// Curl should never read proxy settings from the environment, as
	115	// we determine which proxy to use. Do this for consistency among
	116	// methods and prevent an environment variable overriding a
	117	// no-proxy ("DIRECT") setting in apt.conf.
	118	curl_easy_setopt(curl, CURLOPT_PROXY, "");
	119
4407a02f MV	120	// Determine the proxy setting - try https first, fallback to http and use env at last
	121	string UseProxy = _config->Find("Acquire::https::Proxy::" + ServerName.Host,
	122	_config->Find("Acquire::http::Proxy::" + ServerName.Host).c_str());
	123
	124	if (UseProxy.empty() == true)
	125	UseProxy = _config->Find("Acquire::https::Proxy", _config->Find("Acquire::http::Proxy").c_str());
	126
	127	// User want to use NO proxy, so nothing to setup
	128	if (UseProxy == "DIRECT")
	129	return;
	130
	131	if (UseProxy.empty() == false)
d546f98d	132	{
4407a02f MV	133	// Parse no_proxy, a comma (,) separated list of domains we don't want to use
	134	// a proxy for so we stop right here if it is in the list
	135	if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
	136	return;
	137	} else {
5b63d2a9 MV	138	const char* result = getenv("https_proxy");
	139	// FIXME: Fall back to http_proxy is to remain compatible with
	140	// existing setups and behaviour of apt.conf. This should be
	141	// deprecated in the future (including apt.conf). Most other
	142	// programs do not fall back to http proxy settings and neither
	143	// should Apt.
	144	if (result == NULL)
	145	result = getenv("http_proxy");
4407a02f	146	UseProxy = result == NULL ? "" : result;
d546f98d	147	}
4407a02f	148
d546f98d	149	// Determine what host and port to use based on the proxy settings
4407a02f	150	if (UseProxy.empty() == false)
d546f98d	151	{
4407a02f MV	152	Proxy = UseProxy;
4407a02f MV	153	if (Proxy.Port != 1)
d546f98d MV	154	curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
d546f98d MV	155	curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
5b63d2a9 MV	156	if (Proxy.User.empty() == false \|\| Proxy.Password.empty() == false)
	157	{
	158	curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, Proxy.User.c_str());
	159	curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, Proxy.Password.c_str());
	160	}
d546f98d	161	}
b9e9a44b	162	} /}}}/
d546f98d MV	163	// HttpsMethod::Fetch - Fetch an item /{{{/
	164	// ---------------------------------------------------------------------
	165	/* This adds an item to the pipeline. We keep the pipeline at a fixed
	166	depth. */
	167	bool HttpsMethod::Fetch(FetchItem *Itm)
	168	{
d546f98d MV	169	struct stat SBuf;
d546f98d MV	170	struct curl_slist *headers=NULL;
714ee06c	171	char curl_errorstr[CURL_ERROR_SIZE];
c769cd6f MV	172	URI Uri = Itm->Uri;
c769cd6f MV	173	string remotehost = Uri.Host;
d546f98d MV	174
d546f98d MV	175	// TODO:
d546f98d MV	176	// - http::Pipeline-Depth
	177	// - error checking/reporting
	178	// - more debug options? (CURLOPT_DEBUGFUNCTION?)
	179
5820530d	180	curl_easy_reset(curl);
d546f98d MV	181	SetupProxy();
d546f98d MV	182
1de1f703	183	maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
592b7800	184
d546f98d	185	// callbacks
01fc8930	186	curl_easy_setopt(curl, CURLOPT_URL, static_cast<string>(Uri).c_str());
fd46d305 DK	187	curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_header);
fd46d305 DK	188	curl_easy_setopt(curl, CURLOPT_WRITEHEADER, this);
d546f98d MV	189	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
	190	curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
	191	curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
	192	curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
dc95fee1	193	// options
d546f98d	194	curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
5820530d	195	curl_easy_setopt(curl, CURLOPT_FILETIME, true);
889b0072 DK	196	// only allow curl to handle https, not the other stuff it supports
889b0072 DK	197	curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
dc95fee1	198	curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
d546f98d	199
c769cd6f MV	200	// SSL parameters are set by default to the common (non mirror-specific) value
	201	// if available (or a default one) and gets overload by mirror-specific ones.
	202
	203	// File containing the list of trusted CA.
	204	string cainfo = _config->Find("Acquire::https::CaInfo","");
	205	string knob = "Acquire::https::"+remotehost+"::CaInfo";
	206	cainfo = _config->Find(knob.c_str(),cainfo.c_str());
46e39c8e	207	if(cainfo.empty() == false)
c769cd6f MV	208	curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());
	209
	210	// Check server certificate against previous CA list ...
	211	bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
	212	knob = "Acquire::https::" + remotehost + "::Verify-Peer";
	213	peer_verify = _config->FindB(knob.c_str(), peer_verify);
714ee06c MV	214	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
714ee06c MV	215
c769cd6f	216	// ... and hostname against cert CN or subjectAltName
c769cd6f MV	217	bool verify = _config->FindB("Acquire::https::Verify-Host",true);
	218	knob = "Acquire::https::"+remotehost+"::Verify-Host";
	219	verify = _config->FindB(knob.c_str(),verify);
52b22cea DK	220	int const default_verify = (verify == true) ? 2 : 0;
52b22cea DK	221	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, default_verify);
c769cd6f	222
46e39c8e MV	223	// Also enforce issuer of server certificate using its cert
	224	string issuercert = _config->Find("Acquire::https::IssuerCert","");
	225	knob = "Acquire::https::"+remotehost+"::IssuerCert";
	226	issuercert = _config->Find(knob.c_str(),issuercert.c_str());
	227	if(issuercert.empty() == false)
	228	curl_easy_setopt(curl, CURLOPT_ISSUERCERT,issuercert.c_str());
	229
c769cd6f	230	// For client authentication, certificate file ...
714ee06c	231	string pem = _config->Find("Acquire::https::SslCert","");
c769cd6f MV	232	knob = "Acquire::https::"+remotehost+"::SslCert";
c769cd6f MV	233	pem = _config->Find(knob.c_str(),pem.c_str());
46e39c8e	234	if(pem.empty() == false)
714ee06c	235	curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
c769cd6f MV	236
	237	// ... and associated key.
	238	string key = _config->Find("Acquire::https::SslKey","");
	239	knob = "Acquire::https::"+remotehost+"::SslKey";
	240	key = _config->Find(knob.c_str(),key.c_str());
46e39c8e	241	if(key.empty() == false)
c769cd6f MV	242	curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());
	243
	244	// Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
	245	// supported by GnuTLS).
	246	long final_version = CURL_SSLVERSION_DEFAULT;
	247	string sslversion = _config->Find("Acquire::https::SslForceVersion","");
	248	knob = "Acquire::https::"+remotehost+"::SslForceVersion";
	249	sslversion = _config->Find(knob.c_str(),sslversion.c_str());
	250	if(sslversion == "TLSv1")
	251	final_version = CURL_SSLVERSION_TLSv1;
	252	else if(sslversion == "SSLv3")
	253	final_version = CURL_SSLVERSION_SSLv3;
	254	curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);
d546f98d	255
46e39c8e MV	256	// CRL file
	257	string crlfile = _config->Find("Acquire::https::CrlFile","");
	258	knob = "Acquire::https::"+remotehost+"::CrlFile";
	259	crlfile = _config->Find(knob.c_str(),crlfile.c_str());
	260	if(crlfile.empty() == false)
	261	curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str());
	262
d546f98d	263	// cache-control
b9e9a44b DK	264	if(_config->FindB("Acquire::https::No-Cache",
b9e9a44b DK	265	_config->FindB("Acquire::http::No-Cache",false)) == false)
d546f98d MV	266	{
d546f98d MV	267	// cache enabled
b9e9a44b DK	268	if (_config->FindB("Acquire::https::No-Store",
b9e9a44b DK	269	_config->FindB("Acquire::http::No-Store",false)) == true)
d546f98d	270	headers = curl_slist_append(headers,"Cache-Control: no-store");
8654fae9	271	stringstream ss;
b9e9a44b DK	272	ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::https::Max-Age",
b9e9a44b DK	273	_config->FindI("Acquire::http::Max-Age",0)));
d546f98d MV	274	headers = curl_slist_append(headers, ss.str().c_str());
	275	} else {
	276	// cache disabled by user
	277	headers = curl_slist_append(headers, "Cache-Control: no-cache");
	278	headers = curl_slist_append(headers, "Pragma: no-cache");
	279	}
	280	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
	281
d546f98d	282	// speed limit
46e39c8e	283	int const dlLimit = _config->FindI("Acquire::https::Dl-Limit",
b9e9a44b	284	_config->FindI("Acquire::http::Dl-Limit",0))*1024;
d546f98d MV	285	if (dlLimit > 0)
	286	curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
	287
	288	// set header
9f542bae DK	289	curl_easy_setopt(curl, CURLOPT_USERAGENT,
	290	_config->Find("Acquire::https::User-Agent",
	291	_config->Find("Acquire::http::User-Agent",
335e2c82	292	"Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());
d546f98d	293
cc615257	294	// set timeout
46e39c8e	295	int const timeout = _config->FindI("Acquire::https::Timeout",
b9e9a44b	296	_config->FindI("Acquire::http::Timeout",120));
cc615257	297	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
43cf55db	298	//set really low lowspeed timeout (see #497983)
5085e660	299	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, DL_MIN_SPEED);
43cf55db	300	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);
cc615257	301
668ce84d	302	// set redirect options and default to 10 redirects
46e39c8e	303	bool const AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
b9e9a44b	304	_config->FindB("Acquire::http::AllowRedirect",true));
668ce84d MV	305	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
	306	curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);
	307
d546f98d	308	// debug
714ee06c	309	if(_config->FindB("Debug::Acquire::https", false))
d546f98d MV	310	curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
d546f98d MV	311
714ee06c	312	// error handling
cc418115	313	curl_errorstr[0] = '\0';
714ee06c MV	314	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
714ee06c MV	315
6f4501f9	316	// If we ask for uncompressed files servers might respond with content-
1e3f4083	317	// negotiation which lets us end up with compressed files we do not support,
6f4501f9 DK	318	// see 657029, 657560 and co, so if we have no extension on the request
	319	// ask for text only. As a sidenote: If there is nothing to negotate servers
	320	// seem to be nice and ignore it.
	321	if (_config->FindB("Acquire::https::SendAccept", _config->FindB("Acquire::http::SendAccept", true)) == true)
	322	{
	323	size_t const filepos = Itm->Uri.find_last_of('/');
	324	string const file = Itm->Uri.substr(filepos + 1);
	325	if (flExtension(file) == file)
	326	headers = curl_slist_append(headers, "Accept: text/*");
	327	}
	328
d6039f9e	329	// if we have the file send an if-range query with a range header
4c499611 MV	330	if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
4c499611 MV	331	{
062074cb DK	332	std::string Buf;
	333	strprintf(Buf, "Range: bytes=%lli-", (long long) SBuf.st_size);
	334	headers = curl_slist_append(headers, Buf.c_str());
	335	strprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
	336	headers = curl_slist_append(headers, Buf.c_str());
8654fae9	337	}
d6039f9e MV	338	else if(Itm->LastModified > 0)
	339	{
	340	curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
	341	curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
4c499611	342	}
d546f98d MV	343
	344	// go for it - if the file exists, append on it
	345	File = new FileFd(Itm->DestFile, FileFd::WriteAny);
fd46d305	346	Server = new HttpsServerState(Itm->Uri, this);
85050e76	347
d546f98d MV	348	// keep apt updated
	349	Res.Filename = Itm->DestFile;
	350
	351	// get it!
	352	CURLcode success = curl_easy_perform(curl);
d546f98d	353
1dea08eb MV	354	// If the server returns 200 OK but the If-Modified-Since condition is not
	355	// met, CURLINFO_CONDITION_UNMET will be set to 1
	356	long curl_condition_unmet = 0;
	357	curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &curl_condition_unmet);
	358
db1f1469	359	File->Close();
85050e76	360	curl_slist_free_all(headers);
db1f1469	361
d546f98d	362	// cleanup
85050e76	363	if (success != 0)
4c499611	364	{
9b5d79ec	365	_error->Error("%s", curl_errorstr);
db1f1469	366	unlink(File->Name().c_str());
85050e76 DK	367	return false;
	368	}
	369
	370	// server says file not modified
fd46d305	371	if (Server->Result == 304 \|\| curl_condition_unmet == 1)
85050e76 DK	372	{
	373	unlink(File->Name().c_str());
	374	Res.IMSHit = true;
	375	Res.LastModified = Itm->LastModified;
	376	Res.Size = 0;
	377	URIDone(Res);
d546f98d MV	378	return true;
d546f98d MV	379	}
fd46d305	380	Res.IMSHit = false;
d546f98d	381
fd46d305 DK	382	if (Server->Result != 200 && // OK
	383	Server->Result != 206 && // Partial
	384	Server->Result != 416) // invalid Range
85050e76 DK	385	{
85050e76 DK	386	char err[255];
fd46d305	387	snprintf(err, sizeof(err) - 1, "HttpError%i", Server->Result);
85050e76 DK	388	SetFailReason(err);
	389	_error->Error("%s", err);
	390	// unlink, no need keep 401/404 page content in partial/
	391	unlink(File->Name().c_str());
	392	return false;
	393	}
	394
	395	struct stat resultStat;
	396	if (unlikely(stat(File->Name().c_str(), &resultStat) != 0))
	397	{
	398	_error->Errno("stat", "Unable to access file %s", File->Name().c_str());
	399	return false;
	400	}
	401	Res.Size = resultStat.st_size;
	402
	403	// invalid range-request
fd46d305	404	if (Server->Result == 416)
85050e76 DK	405	{
	406	unlink(File->Name().c_str());
	407	Res.Size = 0;
	408	delete File;
	409	Redirect(Itm->Uri);
	410	return true;
5820530d OS	411	}
5820530d OS	412
85050e76 DK	413	// Timestamp
	414	curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
	415	if (Res.LastModified != -1)
	416	{
246bbb61	417	struct timeval times[2];
9ce3cfc9 DK	418	times[0].tv_sec = Res.LastModified;
9ce3cfc9 DK	419	times[1].tv_sec = Res.LastModified;
246bbb61 DK	420	times[0].tv_usec = times[1].tv_usec = 0;
246bbb61 DK	421	utimes(File->Name().c_str(), times);
85050e76 DK	422	}
	423	else
	424	Res.LastModified = resultStat.st_mtime;
d546f98d MV	425
	426	// take hashes
	427	Hashes Hash;
	428	FileFd Fd(Res.Filename, FileFd::ReadOnly);
109eb151	429	Hash.AddFD(Fd);
d546f98d	430	Res.TakeHashes(Hash);
85050e76	431
d546f98d MV	432	// keep apt updated
	433	URIDone(Res);
	434
	435	// cleanup
d546f98d MV	436	Res.Size = 0;
d546f98d MV	437	delete File;
d546f98d MV	438
d546f98d MV	439	return true;
d3e8fbb3	440	}
d546f98d MV	441
	442	int main()
	443	{
	444	setlocale(LC_ALL, "");
	445
3927c6da MV	446	DropPrivs();
3927c6da MV	447
d546f98d MV	448	HttpsMethod Mth;
	449	curl_global_init(CURL_GLOBAL_SSL) ;
	450
	451	return Mth.Run();
	452	}
	453