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1// -*- mode: cpp; mode: fold -*-
2// Description /*{{{*/
3// $Id: http.cc,v 1.59 2004/05/08 19:42:35 mdz Exp $
4/* ######################################################################
5
ae58a985 6 HTTPS Acquire Method - This is the HTTPS aquire method for APT.
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7
8 It uses libcurl
9
10 ##################################################################### */
11 /*}}}*/
12// Include Files /*{{{*/
13#include <apt-pkg/fileutl.h>
14#include <apt-pkg/acquire-method.h>
15#include <apt-pkg/error.h>
16#include <apt-pkg/hashes.h>
17
18#include <sys/stat.h>
19#include <sys/time.h>
20#include <utime.h>
21#include <unistd.h>
22#include <signal.h>
23#include <stdio.h>
24#include <errno.h>
25#include <string.h>
26#include <iostream>
27#include <apti18n.h>
28#include <sstream>
29
30#include "config.h"
31#include "https.h"
32
33 /*}}}*/
34using namespace std;
35
36size_t
37HttpsMethod::write_data(void *buffer, size_t size, size_t nmemb, void *userp)
38{
39 HttpsMethod *me = (HttpsMethod *)userp;
40
41 if(me->File->Write(buffer, size*nmemb) != true)
42 return false;
43
44 return size*nmemb;
45}
46
47int
48HttpsMethod::progress_callback(void *clientp, double dltotal, double dlnow,
49 double ultotal, double ulnow)
50{
51 HttpsMethod *me = (HttpsMethod *)clientp;
52 if(dltotal > 0 && me->Res.Size == 0) {
21fd1746 53 me->Res.Size = (unsigned long)dltotal;
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54 me->URIStart(me->Res);
55 }
56 return 0;
57}
58
21fd1746 59void HttpsMethod::SetupProxy()
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60{
61 URI ServerName = Queue->Uri;
62
63 // Determine the proxy setting
64 if (getenv("http_proxy") == 0)
65 {
66 string DefProxy = _config->Find("Acquire::http::Proxy");
67 string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
68 if (SpecificProxy.empty() == false)
69 {
70 if (SpecificProxy == "DIRECT")
71 Proxy = "";
72 else
73 Proxy = SpecificProxy;
74 }
75 else
76 Proxy = DefProxy;
77 }
78
79 // Parse no_proxy, a , separated list of domains
80 if (getenv("no_proxy") != 0)
81 {
82 if (CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
83 Proxy = "";
84 }
85
86 // Determine what host and port to use based on the proxy settings
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87 string Host;
88 if (Proxy.empty() == true || Proxy.Host.empty() == true)
89 {
90 }
91 else
92 {
93 if (Proxy.Port != 0)
94 curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
95 curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
96 }
97}
98
99
100// HttpsMethod::Fetch - Fetch an item /*{{{*/
101// ---------------------------------------------------------------------
102/* This adds an item to the pipeline. We keep the pipeline at a fixed
103 depth. */
104bool HttpsMethod::Fetch(FetchItem *Itm)
105{
106 stringstream ss;
107 struct stat SBuf;
108 struct curl_slist *headers=NULL;
714ee06c 109 char curl_errorstr[CURL_ERROR_SIZE];
4c499611 110 long curl_responsecode;
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111 URI Uri = Itm->Uri;
112 string remotehost = Uri.Host;
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113
114 // TODO:
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115 // - http::Pipeline-Depth
116 // - error checking/reporting
117 // - more debug options? (CURLOPT_DEBUGFUNCTION?)
118
5820530d 119 curl_easy_reset(curl);
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120 SetupProxy();
121
122 // callbacks
123 curl_easy_setopt(curl, CURLOPT_URL, Itm->Uri.c_str());
124 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
125 curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
126 curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
127 curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
128 curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
129 curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);
5820530d 130 curl_easy_setopt(curl, CURLOPT_FILETIME, true);
d546f98d 131
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132 // SSL parameters are set by default to the common (non mirror-specific) value
133 // if available (or a default one) and gets overload by mirror-specific ones.
134
135 // File containing the list of trusted CA.
136 string cainfo = _config->Find("Acquire::https::CaInfo","");
137 string knob = "Acquire::https::"+remotehost+"::CaInfo";
138 cainfo = _config->Find(knob.c_str(),cainfo.c_str());
139 if(cainfo != "")
140 curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());
141
142 // Check server certificate against previous CA list ...
143 bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
144 knob = "Acquire::https::" + remotehost + "::Verify-Peer";
145 peer_verify = _config->FindB(knob.c_str(), peer_verify);
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146 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
147
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148 // ... and hostname against cert CN or subjectAltName
149 int default_verify = 2;
150 bool verify = _config->FindB("Acquire::https::Verify-Host",true);
151 knob = "Acquire::https::"+remotehost+"::Verify-Host";
152 verify = _config->FindB(knob.c_str(),verify);
153 if (!verify)
154 default_verify = 0;
155 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, verify);
156
157 // For client authentication, certificate file ...
714ee06c 158 string pem = _config->Find("Acquire::https::SslCert","");
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159 knob = "Acquire::https::"+remotehost+"::SslCert";
160 pem = _config->Find(knob.c_str(),pem.c_str());
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161 if(pem != "")
162 curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
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163
164 // ... and associated key.
165 string key = _config->Find("Acquire::https::SslKey","");
166 knob = "Acquire::https::"+remotehost+"::SslKey";
167 key = _config->Find(knob.c_str(),key.c_str());
168 if(key != "")
169 curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());
170
171 // Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
172 // supported by GnuTLS).
173 long final_version = CURL_SSLVERSION_DEFAULT;
174 string sslversion = _config->Find("Acquire::https::SslForceVersion","");
175 knob = "Acquire::https::"+remotehost+"::SslForceVersion";
176 sslversion = _config->Find(knob.c_str(),sslversion.c_str());
177 if(sslversion == "TLSv1")
178 final_version = CURL_SSLVERSION_TLSv1;
179 else if(sslversion == "SSLv3")
180 final_version = CURL_SSLVERSION_SSLv3;
181 curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);
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182
183 // cache-control
184 if(_config->FindB("Acquire::http::No-Cache",false) == false)
185 {
186 // cache enabled
187 if (_config->FindB("Acquire::http::No-Store",false) == true)
188 headers = curl_slist_append(headers,"Cache-Control: no-store");
189 ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::http::Max-Age",0));
190 headers = curl_slist_append(headers, ss.str().c_str());
191 } else {
192 // cache disabled by user
193 headers = curl_slist_append(headers, "Cache-Control: no-cache");
194 headers = curl_slist_append(headers, "Pragma: no-cache");
195 }
196 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
197
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198 // speed limit
199 int dlLimit = _config->FindI("Acquire::http::Dl-Limit",0)*1024;
200 if (dlLimit > 0)
201 curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
202
203 // set header
204 curl_easy_setopt(curl, CURLOPT_USERAGENT,"Debian APT-CURL/1.0 ("VERSION")");
205
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206 // set timeout
207 int timeout = _config->FindI("Acquire::http::Timeout",120);
208 curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
209 curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
210
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211 // set redirect options and default to 10 redirects
212 bool AllowRedirect = _config->FindI("Acquire::https::AllowRedirect", true);
213 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
214 curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);
215
d546f98d 216 // debug
714ee06c 217 if(_config->FindB("Debug::Acquire::https", false))
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218 curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
219
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220 // error handling
221 curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
222
d6039f9e 223 // if we have the file send an if-range query with a range header
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224 if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
225 {
226 char Buf[1000];
227 sprintf(Buf,"Range: bytes=%li-\r\nIf-Range: %s\r\n",
228 (long)SBuf.st_size - 1,
229 TimeRFC1123(SBuf.st_mtime).c_str());
230 headers = curl_slist_append(headers, Buf);
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231 }
232 else if(Itm->LastModified > 0)
233 {
234 curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
235 curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
4c499611 236 }
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237
238 // go for it - if the file exists, append on it
239 File = new FileFd(Itm->DestFile, FileFd::WriteAny);
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240 if (File->Size() > 0)
241 File->Seek(File->Size() - 1);
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242
243 // keep apt updated
244 Res.Filename = Itm->DestFile;
245
246 // get it!
247 CURLcode success = curl_easy_perform(curl);
4c499611 248 curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &curl_responsecode);
d546f98d 249
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250 long curl_servdate;
251 curl_easy_getinfo(curl, CURLINFO_FILETIME, &curl_servdate);
252
d546f98d 253 // cleanup
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254 if(success != 0)
255 {
9b5d79ec 256 _error->Error("%s", curl_errorstr);
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257 Fail();
258 return true;
259 }
4c499611 260 File->Close();
d546f98d 261
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262 // Timestamp
263 struct utimbuf UBuf;
264 if (curl_servdate != -1) {
265 UBuf.actime = curl_servdate;
266 UBuf.modtime = curl_servdate;
267 utime(File->Name().c_str(),&UBuf);
268 }
269
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270 // check the downloaded result
271 struct stat Buf;
272 if (stat(File->Name().c_str(),&Buf) == 0)
273 {
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274 Res.Filename = File->Name();
275 Res.LastModified = Buf.st_mtime;
276 Res.IMSHit = false;
4c499611 277 if (curl_responsecode == 304)
714ee06c 278 {
d6039f9e 279 unlink(File->Name().c_str());
d546f98d 280 Res.IMSHit = true;
714ee06c 281 Res.LastModified = Itm->LastModified;
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282 Res.Size = 0;
283 URIDone(Res);
284 return true;
714ee06c 285 }
d6039f9e 286 Res.Size = Buf.st_size;
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287 }
288
289 // take hashes
290 Hashes Hash;
291 FileFd Fd(Res.Filename, FileFd::ReadOnly);
292 Hash.AddFD(Fd.Fd(), Fd.Size());
293 Res.TakeHashes(Hash);
294
295 // keep apt updated
296 URIDone(Res);
297
298 // cleanup
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299 Res.Size = 0;
300 delete File;
301 curl_slist_free_all(headers);
302
303 return true;
304};
305
306int main()
307{
308 setlocale(LC_ALL, "");
309
310 HttpsMethod Mth;
311 curl_global_init(CURL_GLOBAL_SSL) ;
312
313 return Mth.Run();
314}
315
316