[apt.git] / methods / https.cc

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

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

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

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

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

#include "https.h"

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

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

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

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

   return size*nmemb;
}

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

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

   return size*nmemb;
}

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

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

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

   // Curl should never read proxy settings from the environment, as
   // we determine which proxy to use.  Do this for consistency among
   // methods and prevent an environment variable overriding a
   // no-proxy ("DIRECT") setting in apt.conf.
   curl_easy_setopt(curl, CURLOPT_PROXY, "");

   // Determine the proxy setting - try https first, fallback to http and use env at last
   string UseProxy = _config->Find("Acquire::https::Proxy::" + ServerName.Host,
				   _config->Find("Acquire::http::Proxy::" + ServerName.Host).c_str());

   if (UseProxy.empty() == true)
      UseProxy = _config->Find("Acquire::https::Proxy", _config->Find("Acquire::http::Proxy").c_str());

   // User want to use NO proxy, so nothing to setup
   if (UseProxy == "DIRECT")
      return;

   if (UseProxy.empty() == false) 
   {
      // Parse no_proxy, a comma (,) separated list of domains we don't want to use
      // a proxy for so we stop right here if it is in the list
      if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
	 return;
   } else {
      const char* result = getenv("https_proxy");
      // FIXME: Fall back to http_proxy is to remain compatible with
      // existing setups and behaviour of apt.conf.  This should be
      // deprecated in the future (including apt.conf).  Most other
      // programs do not fall back to http proxy settings and neither
      // should Apt.
      if (result == NULL)
         result = getenv("http_proxy");
      UseProxy = result == NULL ? "" : result;
   }

   // Determine what host and port to use based on the proxy settings
   if (UseProxy.empty() == false) 
   {
      Proxy = UseProxy;
      if (Proxy.Port != 1)
	 curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
      curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
      if (Proxy.User.empty() == false || Proxy.Password.empty() == false)
      {
         curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, Proxy.User.c_str());
         curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, Proxy.Password.c_str());
      }
   }
}									/*}}}*/
// HttpsMethod::Fetch - Fetch an item					/*{{{*/
// ---------------------------------------------------------------------
/* This adds an item to the pipeline. We keep the pipeline at a fixed
   depth. */
bool HttpsMethod::Fetch(FetchItem *Itm)
{
   struct stat SBuf;
   struct curl_slist *headers=NULL;  
   char curl_errorstr[CURL_ERROR_SIZE];
   URI Uri = Itm->Uri;
   string remotehost = Uri.Host;

   // TODO:
   //       - http::Pipeline-Depth
   //       - error checking/reporting
   //       - more debug options? (CURLOPT_DEBUGFUNCTION?)

   curl_easy_reset(curl);
   SetupProxy();

   maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

   // if we have the file send an if-range query with a range header
   if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
   {
      char Buf[1000];
      sprintf(Buf, "Range: bytes=%li-", (long) SBuf.st_size);
      headers = curl_slist_append(headers, Buf);
      sprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
      headers = curl_slist_append(headers, Buf);
   }
   else if(Itm->LastModified > 0)
   {
      curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
      curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
   }

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

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

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

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

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

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

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

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

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

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

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

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

   // keep apt updated
   URIDone(Res);

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

   return true;
}

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

   HttpsMethod Mth;
   curl_global_init(CURL_GLOBAL_SSL) ;

   return Mth.Run();
}
Commit	Line	Data
b9e9a44b	1	//-- mode: cpp; mode: fold --
d546f98d MV	2	// Description /{{{/
	3	// $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
	4	/* ######################################################################
	5
1e3f4083	6	HTTPS Acquire Method - This is the HTTPS acquire method for APT.
d546f98d MV	7
	8	It uses libcurl
	9
	10	##################################################################### */
	11	/}}}/
	12	// Include Files /{{{/
ea542140 DK	13	#include <config.h>
ea542140 DK	14
d546f98d MV	15	#include <apt-pkg/fileutl.h>
	16	#include <apt-pkg/acquire-method.h>
	17	#include <apt-pkg/error.h>
	18	#include <apt-pkg/hashes.h>
592b7800	19	#include <apt-pkg/netrc.h>
472ff00e	20	#include <apt-pkg/configuration.h>
453b82a3 DK	21	#include <apt-pkg/macros.h>
453b82a3 DK	22	#include <apt-pkg/strutl.h>
d546f98d MV	23
	24	#include <sys/stat.h>
	25	#include <sys/time.h>
d546f98d	26	#include <unistd.h>
d546f98d	27	#include <stdio.h>
d546f98d	28	#include <iostream>
d546f98d	29	#include <sstream>
453b82a3 DK	30	#include <ctype.h>
453b82a3 DK	31	#include <stdlib.h>
d546f98d	32
d546f98d	33	#include "https.h"
453b82a3	34
ea542140	35	#include <apti18n.h>
d546f98d MV	36	/}}}/
	37	using namespace std;
	38
fd46d305 DK	39	size_t
	40	HttpsMethod::parse_header(void buffer, size_t size, size_t nmemb, void userp)
	41	{
	42	size_t len = size * nmemb;
	43	HttpsMethod me = (HttpsMethod )userp;
	44	std::string line((char*) buffer, len);
	45	for (--len; len > 0; --len)
	46	if (isspace(line[len]) == 0)
	47	{
	48	++len;
	49	break;
	50	}
	51	line.erase(len);
	52
	53	if (line.empty() == true)
	54	{
	55	if (me->Server->Result != 416 && me->Server->StartPos != 0)
	56	;
	57	else if (me->Server->Result == 416 && me->Server->Size == me->File->FileSize())
	58	{
	59	me->Server->Result = 200;
	60	me->Server->StartPos = me->Server->Size;
	61	}
	62	else
	63	me->Server->StartPos = 0;
	64
	65	me->File->Truncate(me->Server->StartPos);
	66	me->File->Seek(me->Server->StartPos);
	67	}
	68	else if (me->Server->HeaderLine(line) == false)
	69	return 0;
	70
	71	return size*nmemb;
	72	}
	73
d546f98d MV	74	size_t
	75	HttpsMethod::write_data(void buffer, size_t size, size_t nmemb, void userp)
	76	{
	77	HttpsMethod me = (HttpsMethod )userp;
	78
f9b4f12d DK	79	if (me->Res.Size == 0)
f9b4f12d DK	80	me->URIStart(me->Res);
d546f98d MV	81	if(me->File->Write(buffer, size*nmemb) != true)
	82	return false;
	83
	84	return size*nmemb;
	85	}
	86
65512241 DK	87	int
	88	HttpsMethod::progress_callback(void clientp, double dltotal, double /dlnow*/,
	89	double /ultotal/, double /ulnow/)
d546f98d MV	90	{
	91	HttpsMethod me = (HttpsMethod )clientp;
	92	if(dltotal > 0 && me->Res.Size == 0) {
650faab0	93	me->Res.Size = (unsigned long long)dltotal;
d546f98d MV	94	}
	95	return 0;
	96	}
	97
fd46d305	98	// HttpsServerState::HttpsServerState - Constructor /{{{/
65512241	99	HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * /Owner/) : ServerState(Srv, NULL)
fd46d305 DK	100	{
	101	TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
	102	Reset();
	103	}
	104	/}}}/
	105
4407a02f	106	void HttpsMethod::SetupProxy() /{{{/
d546f98d MV	107	{
	108	URI ServerName = Queue->Uri;
	109
5b63d2a9 MV	110	// Curl should never read proxy settings from the environment, as
	111	// we determine which proxy to use. Do this for consistency among
	112	// methods and prevent an environment variable overriding a
	113	// no-proxy ("DIRECT") setting in apt.conf.
	114	curl_easy_setopt(curl, CURLOPT_PROXY, "");
	115
4407a02f MV	116	// Determine the proxy setting - try https first, fallback to http and use env at last
	117	string UseProxy = _config->Find("Acquire::https::Proxy::" + ServerName.Host,
	118	_config->Find("Acquire::http::Proxy::" + ServerName.Host).c_str());
	119
	120	if (UseProxy.empty() == true)
	121	UseProxy = _config->Find("Acquire::https::Proxy", _config->Find("Acquire::http::Proxy").c_str());
	122
	123	// User want to use NO proxy, so nothing to setup
	124	if (UseProxy == "DIRECT")
	125	return;
	126
	127	if (UseProxy.empty() == false)
d546f98d	128	{
4407a02f MV	129	// Parse no_proxy, a comma (,) separated list of domains we don't want to use
	130	// a proxy for so we stop right here if it is in the list
	131	if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
	132	return;
	133	} else {
5b63d2a9 MV	134	const char* result = getenv("https_proxy");
	135	// FIXME: Fall back to http_proxy is to remain compatible with
	136	// existing setups and behaviour of apt.conf. This should be
	137	// deprecated in the future (including apt.conf). Most other
	138	// programs do not fall back to http proxy settings and neither
	139	// should Apt.
	140	if (result == NULL)
	141	result = getenv("http_proxy");
4407a02f	142	UseProxy = result == NULL ? "" : result;
d546f98d	143	}
4407a02f	144
d546f98d	145	// Determine what host and port to use based on the proxy settings
4407a02f	146	if (UseProxy.empty() == false)
d546f98d	147	{
4407a02f MV	148	Proxy = UseProxy;
4407a02f MV	149	if (Proxy.Port != 1)
d546f98d MV	150	curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
d546f98d MV	151	curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
5b63d2a9 MV	152	if (Proxy.User.empty() == false \|\| Proxy.Password.empty() == false)
	153	{
	154	curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, Proxy.User.c_str());
	155	curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, Proxy.Password.c_str());
	156	}
d546f98d	157	}
b9e9a44b	158	} /}}}/
d546f98d MV	159	// HttpsMethod::Fetch - Fetch an item /{{{/
	160	// ---------------------------------------------------------------------
	161	/* This adds an item to the pipeline. We keep the pipeline at a fixed
	162	depth. */
	163	bool HttpsMethod::Fetch(FetchItem *Itm)
	164	{
d546f98d MV	165	struct stat SBuf;
d546f98d MV	166	struct curl_slist *headers=NULL;
714ee06c	167	char curl_errorstr[CURL_ERROR_SIZE];
c769cd6f MV	168	URI Uri = Itm->Uri;
c769cd6f MV	169	string remotehost = Uri.Host;
d546f98d MV	170
d546f98d MV	171	// TODO:
d546f98d MV	172	// - http::Pipeline-Depth
	173	// - error checking/reporting
	174	// - more debug options? (CURLOPT_DEBUGFUNCTION?)
	175
5820530d	176	curl_easy_reset(curl);
d546f98d MV	177	SetupProxy();
d546f98d MV	178
1de1f703	179	maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
592b7800	180
d546f98d	181	// callbacks
01fc8930	182	curl_easy_setopt(curl, CURLOPT_URL, static_cast<string>(Uri).c_str());
fd46d305 DK	183	curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, parse_header);
fd46d305 DK	184	curl_easy_setopt(curl, CURLOPT_WRITEHEADER, this);
d546f98d MV	185	curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
	186	curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
	187	curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
	188	curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
dc95fee1	189	// options
d546f98d	190	curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
5820530d	191	curl_easy_setopt(curl, CURLOPT_FILETIME, true);
889b0072 DK	192	// only allow curl to handle https, not the other stuff it supports
889b0072 DK	193	curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS);
dc95fee1	194	curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS);
d546f98d	195
c769cd6f MV	196	// SSL parameters are set by default to the common (non mirror-specific) value
	197	// if available (or a default one) and gets overload by mirror-specific ones.
	198
	199	// File containing the list of trusted CA.
	200	string cainfo = _config->Find("Acquire::https::CaInfo","");
	201	string knob = "Acquire::https::"+remotehost+"::CaInfo";
	202	cainfo = _config->Find(knob.c_str(),cainfo.c_str());
46e39c8e	203	if(cainfo.empty() == false)
c769cd6f MV	204	curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());
	205
	206	// Check server certificate against previous CA list ...
	207	bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
	208	knob = "Acquire::https::" + remotehost + "::Verify-Peer";
	209	peer_verify = _config->FindB(knob.c_str(), peer_verify);
714ee06c MV	210	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
714ee06c MV	211
c769cd6f	212	// ... and hostname against cert CN or subjectAltName
c769cd6f MV	213	bool verify = _config->FindB("Acquire::https::Verify-Host",true);
	214	knob = "Acquire::https::"+remotehost+"::Verify-Host";
	215	verify = _config->FindB(knob.c_str(),verify);
52b22cea DK	216	int const default_verify = (verify == true) ? 2 : 0;
52b22cea DK	217	curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, default_verify);
c769cd6f	218
46e39c8e MV	219	// Also enforce issuer of server certificate using its cert
	220	string issuercert = _config->Find("Acquire::https::IssuerCert","");
	221	knob = "Acquire::https::"+remotehost+"::IssuerCert";
	222	issuercert = _config->Find(knob.c_str(),issuercert.c_str());
	223	if(issuercert.empty() == false)
	224	curl_easy_setopt(curl, CURLOPT_ISSUERCERT,issuercert.c_str());
	225
c769cd6f	226	// For client authentication, certificate file ...
714ee06c	227	string pem = _config->Find("Acquire::https::SslCert","");
c769cd6f MV	228	knob = "Acquire::https::"+remotehost+"::SslCert";
c769cd6f MV	229	pem = _config->Find(knob.c_str(),pem.c_str());
46e39c8e	230	if(pem.empty() == false)
714ee06c	231	curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
c769cd6f MV	232
	233	// ... and associated key.
	234	string key = _config->Find("Acquire::https::SslKey","");
	235	knob = "Acquire::https::"+remotehost+"::SslKey";
	236	key = _config->Find(knob.c_str(),key.c_str());
46e39c8e	237	if(key.empty() == false)
c769cd6f MV	238	curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());
	239
	240	// Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
	241	// supported by GnuTLS).
	242	long final_version = CURL_SSLVERSION_DEFAULT;
	243	string sslversion = _config->Find("Acquire::https::SslForceVersion","");
	244	knob = "Acquire::https::"+remotehost+"::SslForceVersion";
	245	sslversion = _config->Find(knob.c_str(),sslversion.c_str());
	246	if(sslversion == "TLSv1")
	247	final_version = CURL_SSLVERSION_TLSv1;
	248	else if(sslversion == "SSLv3")
	249	final_version = CURL_SSLVERSION_SSLv3;
	250	curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);
d546f98d	251
46e39c8e MV	252	// CRL file
	253	string crlfile = _config->Find("Acquire::https::CrlFile","");
	254	knob = "Acquire::https::"+remotehost+"::CrlFile";
	255	crlfile = _config->Find(knob.c_str(),crlfile.c_str());
	256	if(crlfile.empty() == false)
	257	curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str());
	258
d546f98d	259	// cache-control
b9e9a44b DK	260	if(_config->FindB("Acquire::https::No-Cache",
b9e9a44b DK	261	_config->FindB("Acquire::http::No-Cache",false)) == false)
d546f98d MV	262	{
d546f98d MV	263	// cache enabled
b9e9a44b DK	264	if (_config->FindB("Acquire::https::No-Store",
b9e9a44b DK	265	_config->FindB("Acquire::http::No-Store",false)) == true)
d546f98d	266	headers = curl_slist_append(headers,"Cache-Control: no-store");
8654fae9	267	stringstream ss;
b9e9a44b DK	268	ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::https::Max-Age",
b9e9a44b DK	269	_config->FindI("Acquire::http::Max-Age",0)));
d546f98d MV	270	headers = curl_slist_append(headers, ss.str().c_str());
	271	} else {
	272	// cache disabled by user
	273	headers = curl_slist_append(headers, "Cache-Control: no-cache");
	274	headers = curl_slist_append(headers, "Pragma: no-cache");
	275	}
	276	curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
	277
d546f98d	278	// speed limit
46e39c8e	279	int const dlLimit = _config->FindI("Acquire::https::Dl-Limit",
b9e9a44b	280	_config->FindI("Acquire::http::Dl-Limit",0))*1024;
d546f98d MV	281	if (dlLimit > 0)
	282	curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
	283
	284	// set header
9f542bae DK	285	curl_easy_setopt(curl, CURLOPT_USERAGENT,
	286	_config->Find("Acquire::https::User-Agent",
	287	_config->Find("Acquire::http::User-Agent",
335e2c82	288	"Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());
d546f98d	289
cc615257	290	// set timeout
46e39c8e	291	int const timeout = _config->FindI("Acquire::https::Timeout",
b9e9a44b	292	_config->FindI("Acquire::http::Timeout",120));
cc615257	293	curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
43cf55db	294	//set really low lowspeed timeout (see #497983)
5085e660	295	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_LIMIT, DL_MIN_SPEED);
43cf55db	296	curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);
cc615257	297
668ce84d	298	// set redirect options and default to 10 redirects
46e39c8e	299	bool const AllowRedirect = _config->FindB("Acquire::https::AllowRedirect",
b9e9a44b	300	_config->FindB("Acquire::http::AllowRedirect",true));
668ce84d MV	301	curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
	302	curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);
	303
d546f98d	304	// debug
714ee06c	305	if(_config->FindB("Debug::Acquire::https", false))
d546f98d MV	306	curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
d546f98d MV	307
714ee06c	308	// error handling
cc418115	309	curl_errorstr[0] = '\0';
714ee06c MV	310	curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
714ee06c MV	311
6f4501f9	312	// If we ask for uncompressed files servers might respond with content-
1e3f4083	313	// negotiation which lets us end up with compressed files we do not support,
6f4501f9 DK	314	// see 657029, 657560 and co, so if we have no extension on the request
	315	// ask for text only. As a sidenote: If there is nothing to negotate servers
	316	// seem to be nice and ignore it.
	317	if (_config->FindB("Acquire::https::SendAccept", _config->FindB("Acquire::http::SendAccept", true)) == true)
	318	{
	319	size_t const filepos = Itm->Uri.find_last_of('/');
	320	string const file = Itm->Uri.substr(filepos + 1);
	321	if (flExtension(file) == file)
	322	headers = curl_slist_append(headers, "Accept: text/*");
	323	}
	324
d6039f9e	325	// if we have the file send an if-range query with a range header
4c499611 MV	326	if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
	327	{
	328	char Buf[1000];
85050e76	329	sprintf(Buf, "Range: bytes=%li-", (long) SBuf.st_size);
4c499611	330	headers = curl_slist_append(headers, Buf);
8654fae9 DK	331	sprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
	332	headers = curl_slist_append(headers, Buf);
	333	}
d6039f9e MV	334	else if(Itm->LastModified > 0)
	335	{
	336	curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
	337	curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
4c499611	338	}
d546f98d MV	339
	340	// go for it - if the file exists, append on it
	341	File = new FileFd(Itm->DestFile, FileFd::WriteAny);
fd46d305	342	Server = new HttpsServerState(Itm->Uri, this);
85050e76	343
d546f98d MV	344	// keep apt updated
	345	Res.Filename = Itm->DestFile;
	346
	347	// get it!
	348	CURLcode success = curl_easy_perform(curl);
d546f98d	349
1dea08eb MV	350	// If the server returns 200 OK but the If-Modified-Since condition is not
	351	// met, CURLINFO_CONDITION_UNMET will be set to 1
	352	long curl_condition_unmet = 0;
	353	curl_easy_getinfo(curl, CURLINFO_CONDITION_UNMET, &curl_condition_unmet);
	354
db1f1469	355	File->Close();
85050e76	356	curl_slist_free_all(headers);
db1f1469	357
d546f98d	358	// cleanup
85050e76	359	if (success != 0)
4c499611	360	{
9b5d79ec	361	_error->Error("%s", curl_errorstr);
db1f1469	362	unlink(File->Name().c_str());
85050e76 DK	363	return false;
	364	}
	365
	366	// server says file not modified
fd46d305	367	if (Server->Result == 304 \|\| curl_condition_unmet == 1)
85050e76 DK	368	{
	369	unlink(File->Name().c_str());
	370	Res.IMSHit = true;
	371	Res.LastModified = Itm->LastModified;
	372	Res.Size = 0;
	373	URIDone(Res);
d546f98d MV	374	return true;
d546f98d MV	375	}
fd46d305	376	Res.IMSHit = false;
d546f98d	377
fd46d305 DK	378	if (Server->Result != 200 && // OK
	379	Server->Result != 206 && // Partial
	380	Server->Result != 416) // invalid Range
85050e76 DK	381	{
85050e76 DK	382	char err[255];
fd46d305	383	snprintf(err, sizeof(err) - 1, "HttpError%i", Server->Result);
85050e76 DK	384	SetFailReason(err);
	385	_error->Error("%s", err);
	386	// unlink, no need keep 401/404 page content in partial/
	387	unlink(File->Name().c_str());
	388	return false;
	389	}
	390
	391	struct stat resultStat;
	392	if (unlikely(stat(File->Name().c_str(), &resultStat) != 0))
	393	{
	394	_error->Errno("stat", "Unable to access file %s", File->Name().c_str());
	395	return false;
	396	}
	397	Res.Size = resultStat.st_size;
	398
	399	// invalid range-request
fd46d305	400	if (Server->Result == 416)
85050e76 DK	401	{
	402	unlink(File->Name().c_str());
	403	Res.Size = 0;
	404	delete File;
	405	Redirect(Itm->Uri);
	406	return true;
5820530d OS	407	}
5820530d OS	408
85050e76 DK	409	// Timestamp
	410	curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
	411	if (Res.LastModified != -1)
	412	{
246bbb61	413	struct timeval times[2];
9ce3cfc9 DK	414	times[0].tv_sec = Res.LastModified;
9ce3cfc9 DK	415	times[1].tv_sec = Res.LastModified;
246bbb61 DK	416	times[0].tv_usec = times[1].tv_usec = 0;
246bbb61 DK	417	utimes(File->Name().c_str(), times);
85050e76 DK	418	}
	419	else
	420	Res.LastModified = resultStat.st_mtime;
d546f98d MV	421
	422	// take hashes
	423	Hashes Hash;
	424	FileFd Fd(Res.Filename, FileFd::ReadOnly);
109eb151	425	Hash.AddFD(Fd);
d546f98d	426	Res.TakeHashes(Hash);
85050e76	427
d546f98d MV	428	// keep apt updated
	429	URIDone(Res);
	430
	431	// cleanup
d546f98d MV	432	Res.Size = 0;
d546f98d MV	433	delete File;
d546f98d MV	434
d546f98d MV	435	return true;
d3e8fbb3	436	}
d546f98d MV	437
	438	int main()
	439	{
	440	setlocale(LC_ALL, "");
	441
	442	HttpsMethod Mth;
	443	curl_global_init(CURL_GLOBAL_SSL) ;
	444
	445	return Mth.Run();
	446	}
	447