X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/930f51811cd36a695c07f0b8414b118ce28dda04..9127d7aecf01f2999a2589e4b0503288518b2927:/methods/https.cc diff --git a/methods/https.cc b/methods/https.cc index 35c23db20..3a5981b58 100644 --- a/methods/https.cc +++ b/methods/https.cc @@ -3,64 +3,132 @@ // $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 ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ +#include + #include #include #include #include #include +#include +#include +#include +#include #include #include -#include #include -#include #include -#include -#include #include -#include #include +#include +#include -#include "config.h" #include "https.h" +#include /*}}}*/ 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; + // 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->Server->JunkSize = std::numeric_limits::max(); + } + 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; + 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->ReceivedData == false) + { + me->URIStart(me->Res); + me->ReceivedData = true; + } - if(me->File->Write(buffer, size*nmemb) != true) + if(me->File->Write(buffer, buffer_size) != true) return false; - return size*nmemb; + return buffer_size; } -int -HttpsMethod::progress_callback(void *clientp, double dltotal, double dlnow, - double ultotal, double ulnow) +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)dltotal; - me->URIStart(me->Res); + 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()); @@ -79,7 +147,14 @@ void HttpsMethod::SetupProxy() /*{{{*/ 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; } @@ -90,6 +165,11 @@ 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.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 /*{{{*/ @@ -98,13 +178,12 @@ void HttpsMethod::SetupProxy() /*{{{*/ depth. */ bool HttpsMethod::Fetch(FetchItem *Itm) { - stringstream ss; struct stat SBuf; struct curl_slist *headers=NULL; char curl_errorstr[CURL_ERROR_SIZE]; - long curl_responsecode; URI Uri = Itm->Uri; string remotehost = Uri.Host; + ReceivedData = false; // TODO: // - http::Pipeline-Depth @@ -118,13 +197,18 @@ bool HttpsMethod::Fetch(FetchItem *Itm) // callbacks curl_easy_setopt(curl, CURLOPT_URL, static_cast(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_FAILONERROR, 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. @@ -133,7 +217,7 @@ bool HttpsMethod::Fetch(FetchItem *Itm) string cainfo = _config->Find("Acquire::https::CaInfo",""); string knob = "Acquire::https::"+remotehost+"::CaInfo"; cainfo = _config->Find(knob.c_str(),cainfo.c_str()); - if(cainfo != "") + if(cainfo.empty() == false) curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str()); // Check server certificate against previous CA list ... @@ -143,33 +227,31 @@ bool HttpsMethod::Fetch(FetchItem *Itm) curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify); // ... and hostname against cert CN or subjectAltName - int default_verify = 2; bool verify = _config->FindB("Acquire::https::Verify-Host",true); knob = "Acquire::https::"+remotehost+"::Verify-Host"; verify = _config->FindB(knob.c_str(),verify); - if (!verify) - default_verify = 0; - curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 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 != "") + 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 != "") + 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 != "") + if(key.empty() == false) curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str()); // Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not @@ -188,7 +270,7 @@ bool HttpsMethod::Fetch(FetchItem *Itm) string crlfile = _config->Find("Acquire::https::CrlFile",""); knob = "Acquire::https::"+remotehost+"::CrlFile"; crlfile = _config->Find(knob.c_str(),crlfile.c_str()); - if(crlfile != "") + if(crlfile.empty() == false) curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str()); // cache-control @@ -199,6 +281,7 @@ bool HttpsMethod::Fetch(FetchItem *Itm) 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()); @@ -210,7 +293,7 @@ bool HttpsMethod::Fetch(FetchItem *Itm) curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers); // speed limit - int dlLimit = _config->FindI("Acquire::https::Dl-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); @@ -219,10 +302,10 @@ bool HttpsMethod::Fetch(FetchItem *Itm) curl_easy_setopt(curl, CURLOPT_USERAGENT, _config->Find("Acquire::https::User-Agent", _config->Find("Acquire::http::User-Agent", - "Debian APT-CURL/1.0 ("VERSION")").c_str()).c_str()); + "Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()).c_str()); // set timeout - int timeout = _config->FindI("Acquire::https::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) @@ -230,7 +313,7 @@ bool HttpsMethod::Fetch(FetchItem *Itm) curl_easy_setopt(curl, CURLOPT_LOW_SPEED_TIME, timeout); // set redirect options and default to 10 redirects - bool AllowRedirect = _config->FindB("Acquire::https::AllowRedirect", + 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); @@ -240,17 +323,31 @@ bool HttpsMethod::Fetch(FetchItem *Itm) 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-\r\nIf-Range: %s\r\n", - (long)SBuf.st_size - 1, - 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) { curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE); @@ -259,71 +356,101 @@ bool HttpsMethod::Fetch(FetchItem *Itm) // 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 = new HttpsServerState(Itm->Uri, this); + // 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(); + curl_slist_free_all(headers); // cleanup - if(success != 0) + if (success != 0) { _error->Error("%s", curl_errorstr); - Fail(); + 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; } - File->Close(); + Res.IMSHit = false; - // Timestamp - struct utimbuf UBuf; - if (curl_servdate != -1) { - UBuf.actime = curl_servdate; - UBuf.modtime = curl_servdate; - utime(File->Name().c_str(),&UBuf); + 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; } - // check the downloaded result - struct stat Buf; - if (stat(File->Name().c_str(),&Buf) == 0) + struct stat resultStat; + if (unlikely(stat(File->Name().c_str(), &resultStat) != 0)) { - 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; + _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.Fd(), Fd.Size()); + Hash.AddFD(Fd); Res.TakeHashes(Hash); - + // keep apt updated URIDone(Res); // cleanup Res.Size = 0; delete File; - curl_slist_free_all(headers); return true; -}; +} int main() { @@ -335,4 +462,3 @@ int main() return Mth.Run(); } -