calculate only expected hashes in methods

[apt.git] / methods / https.cc

diff --git a/methods/https.cc b/methods/https.cc
index fac7ba7907eab896027cd7d743f6e0ad901d10d5..81903b239c1a46ace6f10d0e1f24585ff0c2fefb 100644 (file)
--- a/methods/https.cc
+++ b/methods/https.cc
@@ -3,7 +3,7 @@
 // $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
 /* ######################################################################
 
 // $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
 /* ######################################################################
 

-   HTTPS Acquire Method - This is the HTTPS aquire method for APT.
+   HTTPS Acquire Method - This is the HTTPS acquire method for APT.

    
    It uses libcurl
 
    
    It uses libcurl
 


@@ -18,51 +18,128 @@
 #include <apt-pkg/hashes.h>
 #include <apt-pkg/netrc.h>
 #include <apt-pkg/configuration.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 <sys/stat.h>
 #include <sys/time.h>

-#include <utime.h>

 #include <unistd.h>
 #include <unistd.h>

-#include <signal.h>

 #include <stdio.h>
 #include <stdio.h>

-#include <errno.h>
-#include <string.h>

 #include <iostream>
 #include <sstream>
 #include <iostream>
 #include <sstream>

+#include <ctype.h>
+#include <stdlib.h>

 
 

-#include "config.h"

 #include "https.h"
 #include "https.h"

+

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

+struct APT_HIDDEN CURLUserPointer {
+   HttpsMethod * const https;
+   HttpsMethod::FetchResult * const Res;
+   CURLUserPointer(HttpsMethod * const https, HttpsMethod::FetchResult * const Res) : https(https), Res(Res) {}
+};
+
+size_t
+HttpsMethod::parse_header(void *buffer, size_t size, size_t nmemb, void *userp)
+{
+   size_t len = size * nmemb;
+   CURLUserPointer *me = (CURLUserPointer *)userp;
+   std::string line((char*) buffer, len);
+   for (--len; len > 0; --len)
+      if (isspace(line[len]) == 0)
+      {
+        ++len;
+        break;
+      }
+   line.erase(len);
+
+   if (line.empty() == true)
+   {
+      if (me->https->Server->Result != 416 && me->https->Server->StartPos != 0)
+        ;
+      else if (me->https->Server->Result == 416 && me->https->Server->Size == me->https->File->FileSize())
+      {
+         me->https->Server->Result = 200;
+        me->https->Server->StartPos = me->https->Server->Size;
+        // the actual size is not important for https as curl will deal with it
+        // by itself and e.g. doesn't bother us with transport-encoding…
+        me->https->Server->JunkSize = std::numeric_limits<unsigned long long>::max();
+      }
+      else
+        me->https->Server->StartPos = 0;
+
+      me->https->File->Truncate(me->https->Server->StartPos);
+      me->https->File->Seek(me->https->Server->StartPos);
+
+      me->Res->LastModified = me->https->Server->Date;
+      me->Res->Size = me->https->Server->Size;
+      me->Res->ResumePoint = me->https->Server->StartPos;
+
+      // we expect valid data, so tell our caller we get the file now
+      if (me->https->Server->Result >= 200 && me->https->Server->Result < 300 &&
+           me->https->Server->JunkSize == 0 &&
+           me->Res->Size != 0 && me->Res->Size > me->Res->ResumePoint)
+        me->https->URIStart(*me->Res);
+   }
+   else if (me->https->Server->HeaderLine(line) == false)
+      return 0;
+
+   return size*nmemb;
+}
+

 size_t 
 HttpsMethod::write_data(void *buffer, size_t size, size_t nmemb, void *userp)
 {
    HttpsMethod *me = (HttpsMethod *)userp;
 size_t 
 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, size*nmemb) != true)
-      return false;
+   if(me->File->Write(buffer, buffer_size) != true)
+      return 0;

 
 

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

 }
 
 }
 

-int 
-HttpsMethod::progress_callback(void *clientp, double dltotal, double dlnow, 
-                             double ultotal, double ulnow)
+// HttpsServerState::HttpsServerState - Constructor                    /*{{{*/
+HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * Owner) : ServerState(Srv, Owner)

 {
 {

-   HttpsMethod *me = (HttpsMethod *)clientp;
-   if(dltotal > 0 && me->Res.Size == 0) {
-      me->Res.Size = (unsigned long long)dltotal;
-      me->URIStart(me->Res);
-   }
-   return 0;
+   TimeOut = _config->FindI("Acquire::https::Timeout",TimeOut);
+   Reset();

 }
 }

+                                                                       /*}}}*/

 
 

-void HttpsMethod::SetupProxy()                                         /*{{{*/
+void HttpsMethod::SetupProxy()                                         /*{{{*/

 {
    URI ServerName = Queue->Uri;
 
 {
    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());
    // 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());


@@ -81,7 +158,14 @@ void HttpsMethod::SetupProxy()                                      /*{{{*/
       if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
         return;
    } else {
       if (getenv("no_proxy") != 0 && CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
         return;
    } else {

-      const char* result = getenv("http_proxy");
+      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;
    }
 
       UseProxy = result == NULL ? "" : result;
    }
 


@@ -92,6 +176,11 @@ void HttpsMethod::SetupProxy()                                      /*{{{*/
       if (Proxy.Port != 1)
         curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
       curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
       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                                  /*{{{*/
    }
 }                                                                      /*}}}*/
 // HttpsMethod::Fetch - Fetch an item                                  /*{{{*/


@@ -101,9 +190,8 @@ void HttpsMethod::SetupProxy()                                      /*{{{*/
 bool HttpsMethod::Fetch(FetchItem *Itm)
 {
    struct stat SBuf;
 bool HttpsMethod::Fetch(FetchItem *Itm)
 {
    struct stat SBuf;

-   struct curl_slist *headers=NULL;  
+   struct curl_slist *headers=NULL;

    char curl_errorstr[CURL_ERROR_SIZE];
    char curl_errorstr[CURL_ERROR_SIZE];

-   long curl_responsecode;

    URI Uri = Itm->Uri;
    string remotehost = Uri.Host;
 
    URI Uri = Itm->Uri;
    string remotehost = Uri.Host;
 


@@ -117,15 +205,20 @@ bool HttpsMethod::Fetch(FetchItem *Itm)
 
    maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc"));
 
 
    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());
    // 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);
    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);
-   curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
-   curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);
+   // options
+   curl_easy_setopt(curl, CURLOPT_NOPROGRESS, true);

    curl_easy_setopt(curl, CURLOPT_FILETIME, 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.
 
    // 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.


@@ -219,7 +312,7 @@ bool HttpsMethod::Fetch(FetchItem *Itm)
    curl_easy_setopt(curl, CURLOPT_USERAGENT,
        _config->Find("Acquire::https::User-Agent",
                _config->Find("Acquire::http::User-Agent",
    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());
+                       "Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str());

 
    // set timeout
    int const timeout = _config->FindI("Acquire::https::Timeout",
 
    // set timeout
    int const timeout = _config->FindI("Acquire::https::Timeout",


@@ -230,20 +323,19 @@ bool HttpsMethod::Fetch(FetchItem *Itm)
    curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout);
 
    // set redirect options and default to 10 redirects
    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
    curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
    curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);
 
    // debug

-   if(_config->FindB("Debug::Acquire::https", false))
+   if (Debug == true)

       curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
 
    // error handling
       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-
    curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
 
    // If we ask for uncompressed files servers might respond with content-

-   // negotation which lets us end up with compressed files we do not support,
+   // 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.
    // 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.


@@ -258,11 +350,11 @@ bool HttpsMethod::Fetch(FetchItem *Itm)
    // 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)
    {
    // 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 - 1);
-      headers = curl_slist_append(headers, Buf);
-      sprintf(Buf, "If-Range: %s", TimeRFC1123(SBuf.st_mtime).c_str());
-      headers = curl_slist_append(headers, Buf);
+      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)
    {
    }
    else if(Itm->LastModified > 0)
    {


@@ -272,74 +364,117 @@ bool HttpsMethod::Fetch(FetchItem *Itm)
 
    // go for it - if the file exists, append on it
    File = new FileFd(Itm->DestFile, FileFd::WriteAny);
 
    // go for it - if the file exists, append on it
    File = new FileFd(Itm->DestFile, FileFd::WriteAny);

-   if (File->Size() > 0)
-      File->Seek(File->Size() - 1);
-   
+   Server = CreateServerState(Itm->Uri);
+

    // keep apt updated
    Res.Filename = Itm->DestFile;
 
    // get it!
    CURLcode success = curl_easy_perform(curl);
    // keep apt updated
    Res.Filename = Itm->DestFile;
 
    // get it!
    CURLcode success = curl_easy_perform(curl);

-   curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &curl_responsecode);

 
 

-   long curl_servdate;
-   curl_easy_getinfo(curl, CURLINFO_FILETIME, &curl_servdate);
+   // 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();
 
    File->Close();

+   curl_slist_free_all(headers);

 
    // cleanup
 
    // cleanup

-   if(success != 0) 
+   if (success != 0)

    {
       _error->Error("%s", curl_errorstr);
    {
       _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());
       // unlink, no need keep 401/404 page content in partial/
       unlink(File->Name().c_str());

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

       return true;
    }
 
       return true;
    }
 

-   // Timestamp
-   struct utimbuf UBuf;
-   if (curl_servdate != -1) {
-       UBuf.actime = curl_servdate;
-       UBuf.modtime = curl_servdate;
-       utime(File->Name().c_str(),&UBuf);
+   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;

 
 

-   // check the downloaded result
-   struct stat Buf;
-   if (stat(File->Name().c_str(),&Buf) == 0)
+   // Timestamp
+   curl_easy_getinfo(curl, CURLINFO_FILETIME, &Res.LastModified);
+   if (Res.LastModified != -1)

    {
    {

-      Res.Filename = File->Name();
-      Res.LastModified = Buf.st_mtime;
-      Res.IMSHit = false;
-      if (curl_responsecode == 304)
-      {
-        unlink(File->Name().c_str());
-        Res.IMSHit = true;
-        Res.LastModified = Itm->LastModified;
-        Res.Size = 0;
-        URIDone(Res);
-        return true;
-      }
-      Res.Size = Buf.st_size;
+      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
 
    // take hashes

-   Hashes Hash;
+   Hashes Hash(Itm->ExpectedHashes);

    FileFd Fd(Res.Filename, FileFd::ReadOnly);
    Hash.AddFD(Fd);
    Res.TakeHashes(Hash);
    FileFd Fd(Res.Filename, FileFd::ReadOnly);
    Hash.AddFD(Fd);
    Res.TakeHashes(Hash);

-   
+

    // keep apt updated
    URIDone(Res);
 
    // cleanup
    // keep apt updated
    URIDone(Res);
 
    // cleanup

-   Res.Size = 0;

    delete File;
    delete File;

-   curl_slist_free_all(headers);

 
    return true;
 
    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()
 {
 
 int main()
 {


@@ -351,4 +486,3 @@ int main()
    return Mth.Run();
 }
 
    return Mth.Run();
 }
 

-