diff options
Diffstat (limited to 'methods/curl.cc')
| -rw-r--r-- | methods/curl.cc | 548 |
1 files changed, 0 insertions, 548 deletions
diff --git a/methods/curl.cc b/methods/curl.cc deleted file mode 100644 index 8e06d858d..000000000 --- a/methods/curl.cc +++ /dev/null @@ -1,548 +0,0 @@ -//-*- 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/configuration.h> -#include <apt-pkg/error.h> -#include <apt-pkg/fileutl.h> -#include <apt-pkg/hashes.h> -#include <apt-pkg/macros.h> -#include <apt-pkg/netrc.h> -#include <apt-pkg/proxy.h> -#include <apt-pkg/strutl.h> - -#include <ctype.h> -#include <stdio.h> -#include <stdlib.h> -#include <sys/stat.h> -#include <sys/time.h> -#include <unistd.h> - -#include <array> -#include <iostream> -#include <sstream> - -#include "curl.h" - -#include <apti18n.h> - /*}}}*/ -using namespace std; - -struct APT_HIDDEN CURLUserPointer { - HttpsMethod * const https; - HttpsMethod::FetchResult * const Res; - HttpsMethod::FetchItem const * const Itm; - RequestState * const Req; - CURLUserPointer(HttpsMethod * const https, HttpsMethod::FetchResult * const Res, - HttpsMethod::FetchItem const * const Itm, RequestState * const Req) : https(https), Res(Res), Itm(Itm), Req(Req) {} -}; - -size_t -HttpsMethod::parse_header(void *buffer, size_t size, size_t nmemb, void *userp) -{ - size_t len = size * nmemb; - CURLUserPointer *me = static_cast<CURLUserPointer *>(userp); - std::string line((char*) buffer, len); - for (--len; len > 0; --len) - if (isspace_ascii(line[len]) == 0) - { - ++len; - break; - } - line.erase(len); - - if (line.empty() == true) - { - if (me->Req->File.Open(me->Itm->DestFile, FileFd::WriteAny) == false) - return ERROR_NOT_FROM_SERVER; - - me->Req->JunkSize = 0; - if (me->Req->Result != 416 && me->Req->StartPos != 0) - ; - else if (me->Req->Result == 416) - { - bool partialHit = false; - if (me->Itm->ExpectedHashes.usable() == true) - { - Hashes resultHashes(me->Itm->ExpectedHashes); - FileFd file(me->Itm->DestFile, FileFd::ReadOnly); - me->Req->TotalFileSize = file.FileSize(); - me->Req->Date = file.ModificationTime(); - resultHashes.AddFD(file); - HashStringList const hashList = resultHashes.GetHashStringList(); - partialHit = (me->Itm->ExpectedHashes == hashList); - } - else if (me->Req->Result == 416 && me->Req->TotalFileSize == me->Req->File.FileSize()) - partialHit = true; - - if (partialHit == true) - { - me->Req->Result = 200; - me->Req->StartPos = me->Req->TotalFileSize; - // 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->Req->JunkSize = std::numeric_limits<unsigned long long>::max(); - } - else - me->Req->StartPos = 0; - } - else - me->Req->StartPos = 0; - - me->Res->LastModified = me->Req->Date; - me->Res->Size = me->Req->TotalFileSize; - me->Res->ResumePoint = me->Req->StartPos; - - // we expect valid data, so tell our caller we get the file now - if (me->Req->Result >= 200 && me->Req->Result < 300) - { - if (me->Res->Size != 0 && me->Res->Size > me->Res->ResumePoint) - me->https->URIStart(*me->Res); - if (me->Req->AddPartialFileToHashes(me->Req->File) == false) - return 0; - } - else - me->Req->JunkSize = std::numeric_limits<decltype(me->Req->JunkSize)>::max(); - } - else if (me->Req->HeaderLine(line) == false) - return 0; - - return size*nmemb; -} - -size_t -HttpsMethod::write_data(void *buffer, size_t size, size_t nmemb, void *userp) -{ - CURLUserPointer *me = static_cast<CURLUserPointer *>(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->Req->JunkSize != 0) - return buffer_size; - - if(me->Req->File.Write(buffer, buffer_size) != true) - return 0; - - if(me->https->Queue->MaximumSize > 0) - { - unsigned long long const TotalWritten = me->Req->File.Tell(); - if (TotalWritten > me->https->Queue->MaximumSize) - { - me->https->SetFailReason("MaximumSizeExceeded"); - _error->Error(_("File has unexpected size (%llu != %llu). Mirror sync in progress?"), - TotalWritten, me->https->Queue->MaximumSize); - return 0; - } - } - - if (me->https->Server->GetHashes()->Add((unsigned char const * const)buffer, buffer_size) == false) - return 0; - - return buffer_size; -} - -// HttpsServerState::HttpsServerState - Constructor /*{{{*/ -HttpsServerState::HttpsServerState(URI Srv,HttpsMethod * Owner) : ServerState(Srv, Owner), Hash(NULL) -{ - TimeOut = Owner->ConfigFindI("Timeout", TimeOut); - Reset(); -} - /*}}}*/ -bool HttpsServerState::InitHashes(HashStringList const &ExpectedHashes) /*{{{*/ -{ - delete Hash; - Hash = new Hashes(ExpectedHashes); - return true; -} - /*}}}*/ -APT_PURE Hashes * HttpsServerState::GetHashes() /*{{{*/ -{ - return Hash; -} - /*}}}*/ - -bool 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 = ConfigFind("Proxy::" + ServerName.Host, ""); - if (UseProxy.empty() == true) - UseProxy = ConfigFind("Proxy", ""); - // User wants to use NO proxy, so nothing to setup - if (UseProxy == "DIRECT") - return true; - - // 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 true; - - if (UseProxy.empty() == true) - { - const char* result = nullptr; - if (std::find(methodNames.begin(), methodNames.end(), "https") != methodNames.end()) - 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 == nullptr && std::find(methodNames.begin(), methodNames.end(), "http") != methodNames.end()) - result = getenv("http_proxy"); - UseProxy = result == nullptr ? "" : result; - } - - // Determine what host and port to use based on the proxy settings - if (UseProxy.empty() == false) - { - Proxy = UseProxy; - AddProxyAuth(Proxy, ServerName); - - if (Proxy.Access == "socks5h") - curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5_HOSTNAME); - else if (Proxy.Access == "socks5") - curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5); - else if (Proxy.Access == "socks4a") - curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4A); - else if (Proxy.Access == "socks") - curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS4); - else if (Proxy.Access == "http" || Proxy.Access == "https") - curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_HTTP); - else - return false; - - 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()); - } - } - return true; -} /*}}}*/ -// 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; - setPostfixForMethodNames(Uri.Host.c_str()); - AllowRedirect = ConfigFindB("AllowRedirect", true); - Debug = DebugEnabled(); - - // TODO: - // - http::Pipeline-Depth - // - error checking/reporting - // - more debug options? (CURLOPT_DEBUGFUNCTION?) - { - auto const plus = Binary.find('+'); - if (plus != std::string::npos) - Uri.Access = Binary.substr(plus + 1); - } - - curl_easy_reset(curl); - if (SetupProxy() == false) - return _error->Error("Unsupported proxy configured: %s", URI::SiteOnly(Proxy).c_str()); - - MaybeAddAuthTo(Uri); - if (Server == nullptr || Server->Comp(Itm->Uri) == false) - Server = CreateServerState(Itm->Uri); - - // The "+" is encoded as a workaround for a amazon S3 bug - // see LP bugs #1003633 and #1086997. (taken from http method) - Uri.Path = QuoteString(Uri.Path, "+~ "); - - FetchResult Res; - RequestState Req(this, Server.get()); - CURLUserPointer userp(this, &Res, Itm, &Req); - // 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, &userp); - // options - curl_easy_setopt(curl, CURLOPT_NOPROGRESS, true); - curl_easy_setopt(curl, CURLOPT_FILETIME, true); - curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 0); - - if (std::find(methodNames.begin(), methodNames.end(), "https") != methodNames.end()) - { - curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTPS); - curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS); - - // File containing the list of trusted CA. - std::string const cainfo = ConfigFind("CaInfo", ""); - if(cainfo.empty() == false) - curl_easy_setopt(curl, CURLOPT_CAINFO, cainfo.c_str()); - // Check server certificate against previous CA list ... - curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, ConfigFindB("Verify-Peer", true) ? 1 : 0); - // ... and hostname against cert CN or subjectAltName - curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, ConfigFindB("Verify-Host", true) ? 2 : 0); - // Also enforce issuer of server certificate using its cert - std::string const issuercert = ConfigFind("IssuerCert", ""); - if(issuercert.empty() == false) - curl_easy_setopt(curl, CURLOPT_ISSUERCERT, issuercert.c_str()); - // For client authentication, certificate file ... - std::string const pem = ConfigFind("SslCert", ""); - if(pem.empty() == false) - curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str()); - // ... and associated key. - std::string const key = ConfigFind("SslKey", ""); - if(key.empty() == false) - curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str()); - // Allow forcing SSL version to SSLv3 or TLSv1 - long final_version = CURL_SSLVERSION_DEFAULT; - std::string const sslversion = ConfigFind("SslForceVersion", ""); - if(sslversion == "TLSv1") - final_version = CURL_SSLVERSION_TLSv1; - else if(sslversion == "TLSv1.0") - final_version = CURL_SSLVERSION_TLSv1_0; - else if(sslversion == "TLSv1.1") - final_version = CURL_SSLVERSION_TLSv1_1; - else if(sslversion == "TLSv1.2") - final_version = CURL_SSLVERSION_TLSv1_2; - else if(sslversion == "SSLv3") - final_version = CURL_SSLVERSION_SSLv3; - curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version); - // CRL file - std::string const crlfile = ConfigFind("CrlFile", ""); - if(crlfile.empty() == false) - curl_easy_setopt(curl, CURLOPT_CRLFILE, crlfile.c_str()); - } - else - { - curl_easy_setopt(curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTP); - curl_easy_setopt(curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP); - } - // cache-control - if(ConfigFindB("No-Cache", false) == false) - { - // cache enabled - if (ConfigFindB("No-Store", false) == true) - headers = curl_slist_append(headers,"Cache-Control: no-store"); - std::string ss; - strprintf(ss, "Cache-Control: max-age=%u", ConfigFindI("Max-Age", 0)); - headers = curl_slist_append(headers, ss.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 = ConfigFindI("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, ConfigFind("User-Agent", "Debian APT-CURL/1.0 (" PACKAGE_VERSION ")").c_str()); - - // set timeout - int const timeout = ConfigFindI("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); - - if(_config->FindB("Acquire::ForceIPv4", false) == true) - curl_easy_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4); - else if(_config->FindB("Acquire::ForceIPv6", false) == true) - curl_easy_setopt(curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V6); - - // debug - if (Debug == true) - 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 (ConfigFindB("SendAccept", 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 (Server->RangesAllowed && 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, false).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); - } - - if (Server->InitHashes(Itm->ExpectedHashes) == false) - return false; - - // 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); - if (curl_condition_unmet == 1) - Req.Result = 304; - - Req.File.Close(); - curl_slist_free_all(headers); - - // cleanup - if (success != CURLE_OK) - { -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wswitch" - switch (success) - { - case CURLE_COULDNT_RESOLVE_PROXY: - case CURLE_COULDNT_RESOLVE_HOST: - SetFailReason("ResolveFailure"); - break; - case CURLE_COULDNT_CONNECT: - SetFailReason("ConnectionRefused"); - break; - case CURLE_OPERATION_TIMEDOUT: - SetFailReason("Timeout"); - break; - } -#pragma GCC diagnostic pop - // only take curls technical errors if we haven't our own - // (e.g. for the maximum size limit we have and curls can be confusing) - if (_error->PendingError() == false) - _error->Error("%s", curl_errorstr); - else - _error->Warning("curl: %s", curl_errorstr); - return false; - } - - switch (DealWithHeaders(Res, Req)) - { - case BaseHttpMethod::IMS_HIT: - URIDone(Res); - break; - - case BaseHttpMethod::ERROR_WITH_CONTENT_PAGE: - // unlink, no need keep 401/404 page content in partial/ - RemoveFile(Binary.c_str(), Req.File.Name()); - // Fall through. - case BaseHttpMethod::ERROR_UNRECOVERABLE: - case BaseHttpMethod::ERROR_NOT_FROM_SERVER: - return false; - - case BaseHttpMethod::TRY_AGAIN_OR_REDIRECT: - Redirect(NextURI); - break; - - case BaseHttpMethod::FILE_IS_OPEN: - struct stat resultStat; - if (unlikely(stat(Req.File.Name().c_str(), &resultStat) != 0)) - { - _error->Errno("stat", "Unable to access file %s", Req.File.Name().c_str()); - return false; - } - Res.Size = resultStat.st_size; - - // 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(Req.File.Name().c_str(), times); - } - else - Res.LastModified = resultStat.st_mtime; - - // take hashes - Res.TakeHashes(*(Server->GetHashes())); - - // keep apt updated - URIDone(Res); - break; - } - return true; -} - /*}}}*/ -std::unique_ptr<ServerState> HttpsMethod::CreateServerState(URI const &uri)/*{{{*/ -{ - return std::unique_ptr<ServerState>(new HttpsServerState(uri, this)); -} - /*}}}*/ -HttpsMethod::HttpsMethod(std::string &&pProg) : BaseHttpMethod(std::move(pProg),"1.2",Pipeline | SendConfig)/*{{{*/ -{ - auto addName = std::inserter(methodNames, methodNames.begin()); - addName = "http"; - auto const plus = Binary.find('+'); - if (plus != std::string::npos) - { - addName = Binary.substr(plus + 1); - auto base = Binary.substr(0, plus); - if (base != "https") - addName = base; - } - if (std::find(methodNames.begin(), methodNames.end(), "https") != methodNames.end()) - curl_global_init(CURL_GLOBAL_SSL); - else - curl_global_init(CURL_GLOBAL_NOTHING); - curl = curl_easy_init(); -} - /*}}}*/ -HttpsMethod::~HttpsMethod() /*{{{*/ -{ - curl_easy_cleanup(curl); -} - /*}}}*/ -int main(int, const char *argv[]) /*{{{*/ -{ - std::string Binary = flNotDir(argv[0]); - if (Binary.find('+') == std::string::npos && Binary != "https") - Binary.append("+https"); - return HttpsMethod(std::move(Binary)).Run(); -} - /*}}}*/ |