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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
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64 string SpecificProxy = _config->Find("Acquire::http::Proxy::" + ServerName.Host);
65 if (!SpecificProxy.empty())
d546f98d 66 {
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67 if (SpecificProxy == "DIRECT")
68 Proxy = "";
69 else
70 Proxy = SpecificProxy;
71 }
72 else
73 {
74 string DefProxy = _config->Find("Acquire::http::Proxy");
75 if (!DefProxy.empty())
76 {
77 Proxy = DefProxy;
78 }
79 else
80 {
81 char* result = getenv("http_proxy");
82 Proxy = result ? result : "";
83 }
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84 }
85
86 // Parse no_proxy, a , separated list of domains
87 if (getenv("no_proxy") != 0)
88 {
89 if (CheckDomainList(ServerName.Host,getenv("no_proxy")) == true)
90 Proxy = "";
91 }
92
93 // Determine what host and port to use based on the proxy settings
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94 string Host;
95 if (Proxy.empty() == true || Proxy.Host.empty() == true)
96 {
97 }
98 else
99 {
100 if (Proxy.Port != 0)
101 curl_easy_setopt(curl, CURLOPT_PROXYPORT, Proxy.Port);
102 curl_easy_setopt(curl, CURLOPT_PROXY, Proxy.Host.c_str());
103 }
104}
105
106
107// HttpsMethod::Fetch - Fetch an item /*{{{*/
108// ---------------------------------------------------------------------
109/* This adds an item to the pipeline. We keep the pipeline at a fixed
110 depth. */
111bool HttpsMethod::Fetch(FetchItem *Itm)
112{
113 stringstream ss;
114 struct stat SBuf;
115 struct curl_slist *headers=NULL;
714ee06c 116 char curl_errorstr[CURL_ERROR_SIZE];
4c499611 117 long curl_responsecode;
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118 URI Uri = Itm->Uri;
119 string remotehost = Uri.Host;
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120
121 // TODO:
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122 // - http::Pipeline-Depth
123 // - error checking/reporting
124 // - more debug options? (CURLOPT_DEBUGFUNCTION?)
125
5820530d 126 curl_easy_reset(curl);
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127 SetupProxy();
128
129 // callbacks
130 curl_easy_setopt(curl, CURLOPT_URL, Itm->Uri.c_str());
131 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
132 curl_easy_setopt(curl, CURLOPT_WRITEDATA, this);
133 curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress_callback);
134 curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, this);
135 curl_easy_setopt(curl, CURLOPT_NOPROGRESS, false);
136 curl_easy_setopt(curl, CURLOPT_FAILONERROR, true);
5820530d 137 curl_easy_setopt(curl, CURLOPT_FILETIME, true);
d546f98d 138
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139 // SSL parameters are set by default to the common (non mirror-specific) value
140 // if available (or a default one) and gets overload by mirror-specific ones.
141
142 // File containing the list of trusted CA.
143 string cainfo = _config->Find("Acquire::https::CaInfo","");
144 string knob = "Acquire::https::"+remotehost+"::CaInfo";
145 cainfo = _config->Find(knob.c_str(),cainfo.c_str());
146 if(cainfo != "")
147 curl_easy_setopt(curl, CURLOPT_CAINFO,cainfo.c_str());
148
149 // Check server certificate against previous CA list ...
150 bool peer_verify = _config->FindB("Acquire::https::Verify-Peer",true);
151 knob = "Acquire::https::" + remotehost + "::Verify-Peer";
152 peer_verify = _config->FindB(knob.c_str(), peer_verify);
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153 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, peer_verify);
154
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155 // ... and hostname against cert CN or subjectAltName
156 int default_verify = 2;
157 bool verify = _config->FindB("Acquire::https::Verify-Host",true);
158 knob = "Acquire::https::"+remotehost+"::Verify-Host";
159 verify = _config->FindB(knob.c_str(),verify);
160 if (!verify)
161 default_verify = 0;
162 curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, verify);
163
164 // For client authentication, certificate file ...
714ee06c 165 string pem = _config->Find("Acquire::https::SslCert","");
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166 knob = "Acquire::https::"+remotehost+"::SslCert";
167 pem = _config->Find(knob.c_str(),pem.c_str());
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168 if(pem != "")
169 curl_easy_setopt(curl, CURLOPT_SSLCERT, pem.c_str());
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170
171 // ... and associated key.
172 string key = _config->Find("Acquire::https::SslKey","");
173 knob = "Acquire::https::"+remotehost+"::SslKey";
174 key = _config->Find(knob.c_str(),key.c_str());
175 if(key != "")
176 curl_easy_setopt(curl, CURLOPT_SSLKEY, key.c_str());
177
178 // Allow forcing SSL version to SSLv3 or TLSv1 (SSLv2 is not
179 // supported by GnuTLS).
180 long final_version = CURL_SSLVERSION_DEFAULT;
181 string sslversion = _config->Find("Acquire::https::SslForceVersion","");
182 knob = "Acquire::https::"+remotehost+"::SslForceVersion";
183 sslversion = _config->Find(knob.c_str(),sslversion.c_str());
184 if(sslversion == "TLSv1")
185 final_version = CURL_SSLVERSION_TLSv1;
186 else if(sslversion == "SSLv3")
187 final_version = CURL_SSLVERSION_SSLv3;
188 curl_easy_setopt(curl, CURLOPT_SSLVERSION, final_version);
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189
190 // cache-control
191 if(_config->FindB("Acquire::http::No-Cache",false) == false)
192 {
193 // cache enabled
194 if (_config->FindB("Acquire::http::No-Store",false) == true)
195 headers = curl_slist_append(headers,"Cache-Control: no-store");
196 ioprintf(ss, "Cache-Control: max-age=%u", _config->FindI("Acquire::http::Max-Age",0));
197 headers = curl_slist_append(headers, ss.str().c_str());
198 } else {
199 // cache disabled by user
200 headers = curl_slist_append(headers, "Cache-Control: no-cache");
201 headers = curl_slist_append(headers, "Pragma: no-cache");
202 }
203 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
204
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205 // speed limit
206 int dlLimit = _config->FindI("Acquire::http::Dl-Limit",0)*1024;
207 if (dlLimit > 0)
208 curl_easy_setopt(curl, CURLOPT_MAX_RECV_SPEED_LARGE, dlLimit);
209
210 // set header
211 curl_easy_setopt(curl, CURLOPT_USERAGENT,"Debian APT-CURL/1.0 ("VERSION")");
212
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213 // set timeout
214 int timeout = _config->FindI("Acquire::http::Timeout",120);
215 curl_easy_setopt(curl, CURLOPT_TIMEOUT, timeout);
216 curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, timeout);
217
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218 // set redirect options and default to 10 redirects
219 bool AllowRedirect = _config->FindI("Acquire::https::AllowRedirect", true);
220 curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, AllowRedirect);
221 curl_easy_setopt(curl, CURLOPT_MAXREDIRS, 10);
222
d546f98d 223 // debug
714ee06c 224 if(_config->FindB("Debug::Acquire::https", false))
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225 curl_easy_setopt(curl, CURLOPT_VERBOSE, true);
226
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227 // error handling
228 curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, curl_errorstr);
229
d6039f9e 230 // if we have the file send an if-range query with a range header
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231 if (stat(Itm->DestFile.c_str(),&SBuf) >= 0 && SBuf.st_size > 0)
232 {
233 char Buf[1000];
234 sprintf(Buf,"Range: bytes=%li-\r\nIf-Range: %s\r\n",
235 (long)SBuf.st_size - 1,
236 TimeRFC1123(SBuf.st_mtime).c_str());
237 headers = curl_slist_append(headers, Buf);
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238 }
239 else if(Itm->LastModified > 0)
240 {
241 curl_easy_setopt(curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
242 curl_easy_setopt(curl, CURLOPT_TIMEVALUE, Itm->LastModified);
4c499611 243 }
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244
245 // go for it - if the file exists, append on it
246 File = new FileFd(Itm->DestFile, FileFd::WriteAny);
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247 if (File->Size() > 0)
248 File->Seek(File->Size() - 1);
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249
250 // keep apt updated
251 Res.Filename = Itm->DestFile;
252
253 // get it!
254 CURLcode success = curl_easy_perform(curl);
4c499611 255 curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &curl_responsecode);
d546f98d 256
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257 long curl_servdate;
258 curl_easy_getinfo(curl, CURLINFO_FILETIME, &curl_servdate);
259
d546f98d 260 // cleanup
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261 if(success != 0)
262 {
9b5d79ec 263 _error->Error("%s", curl_errorstr);
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264 Fail();
265 return true;
266 }
4c499611 267 File->Close();
d546f98d 268
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269 // Timestamp
270 struct utimbuf UBuf;
271 if (curl_servdate != -1) {
272 UBuf.actime = curl_servdate;
273 UBuf.modtime = curl_servdate;
274 utime(File->Name().c_str(),&UBuf);
275 }
276
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277 // check the downloaded result
278 struct stat Buf;
279 if (stat(File->Name().c_str(),&Buf) == 0)
280 {
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281 Res.Filename = File->Name();
282 Res.LastModified = Buf.st_mtime;
283 Res.IMSHit = false;
4c499611 284 if (curl_responsecode == 304)
714ee06c 285 {
d6039f9e 286 unlink(File->Name().c_str());
d546f98d 287 Res.IMSHit = true;
714ee06c 288 Res.LastModified = Itm->LastModified;
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289 Res.Size = 0;
290 URIDone(Res);
291 return true;
714ee06c 292 }
d6039f9e 293 Res.Size = Buf.st_size;
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294 }
295
296 // take hashes
297 Hashes Hash;
298 FileFd Fd(Res.Filename, FileFd::ReadOnly);
299 Hash.AddFD(Fd.Fd(), Fd.Size());
300 Res.TakeHashes(Hash);
301
302 // keep apt updated
303 URIDone(Res);
304
305 // cleanup
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306 Res.Size = 0;
307 delete File;
308 curl_slist_free_all(headers);
309
310 return true;
311};
312
313int main()
314{
315 setlocale(LC_ALL, "");
316
317 HttpsMethod Mth;
318 curl_global_init(CURL_GLOBAL_SSL) ;
319
320 return Mth.Run();
321}
322
323