X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/adb81c02dc57f59cb51132c0f0b37f41cac66688..bdc00df54d97c2825ce37dd1c249f633f199a80b:/methods/https.cc?ds=sidebyside diff --git a/methods/https.cc b/methods/https.cc index 3b2b0bb19..a74d2a38b 100644 --- a/methods/https.cc +++ b/methods/https.cc @@ -1,116 +1,178 @@ -// -*- mode: cpp; mode: fold -*- +//-*- 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 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; + } + 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) +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; } -void HttpsMethod::SetupProxy() +// 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 - if (getenv("http_proxy") == 0) - { - string DefProxy = _config->Find("Acquire::http::Proxy"); - string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host); - if (SpecificProxy.empty() == false) - { - if (SpecificProxy == "DIRECT") - Proxy = ""; - else - Proxy = SpecificProxy; - } - else - Proxy = DefProxy; - } - - // Parse no_proxy, a , separated list of domains - if (getenv("no_proxy") != 0) + 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) { - if (CheckDomainList(ServerName.Host,getenv("no_proxy")) == true) - Proxy = ""; + // 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 - string Host; - if (Proxy.empty() == true || Proxy.Host.empty() == true) - { - } - else + if (UseProxy.empty() == false) { - if (Proxy.Port != 0) + 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) { - 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; // TODO: - // - http::Timeout // - http::Pipeline-Depth // - error checking/reporting // - more debug options? (CURLOPT_DEBUGFUNCTION?) @@ -118,41 +180,97 @@ bool HttpsMethod::Fetch(FetchItem *Itm) curl_easy_reset(curl); SetupProxy(); + maybe_add_auth (Uri, _config->FindFile("Dir::Etc::netrc")); + // callbacks - curl_easy_setopt(curl, CURLOPT_URL, Itm->Uri.c_str()); + 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); - - // FIXME: https: offer various options of verification - bool peer_verify = _config->FindB("Acquire::https::Verify-Peer", false); + // 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); - // sslcert file + // ... 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",""); - if(pem != "") + 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()); - - // CA-Dir - string certdir = _config->Find("Acquire::https::CaPath",""); - if(certdir != "") - curl_easy_setopt(curl, CURLOPT_CAPATH, certdir.c_str()); - - // Server-verify - int verify = _config->FindI("Acquire::https::Verify-Host",2); - curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, verify); + + // ... 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::http::No-Cache",false) == false) + if(_config->FindB("Acquire::https::No-Cache", + _config->FindB("Acquire::http::No-Cache",false)) == false) { // cache enabled - if (_config->FindB("Acquire::http::No-Store",false) == true) + if (_config->FindB("Acquire::https::No-Store", + _config->FindB("Acquire::http::No-Store",false)) == true) headers = curl_slist_append(headers,"Cache-Control: no-store"); - ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::http::Max-Age",0)); + 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 @@ -161,104 +279,165 @@ bool HttpsMethod::Fetch(FetchItem *Itm) } curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers); - // set time values - if(Itm->LastModified > 0) - { - curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE); - curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified); - } - // speed limit - int dlLimit = _config->FindI("Acquire::http::Dl-Limit",0)*1024; + 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,"Debian APT-CURL/1.0 ("VERSION")"); + 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); - // In this case we send an if-range query with a range header + // 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); + 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); - File->Seek(File->Size()); - + 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); + 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()); - _error->Error(curl_errorstr); - Fail(); + Res.IMSHit = true; + Res.LastModified = Itm->LastModified; + Res.Size = 0; + URIDone(Res); return true; } - File->Close(); + Res.IMSHit = false; - if (Res.Size == 0) - Res.Size = File->Size(); + 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; + } - // 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) + // invalid range-request + if (Server->Result == 416) { - Res.Size = Buf.st_size; - Res.Filename = File->Name(); - Res.LastModified = Buf.st_mtime; - Res.IMSHit = false; - if (curl_responsecode == 304) - { - Res.IMSHit = true; - Res.LastModified = Itm->LastModified; - } + 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() { @@ -267,7 +446,8 @@ int main() HttpsMethod Mth; curl_global_init(CURL_GLOBAL_SSL) ; + Mth.DropPrivsOrDie(); + return Mth.Run(); } -