File: msv.c

package info (click to toggle)
libmsv 1.0-1~bpo70+1
  • links: PTS, VCS
  • area: main
  • in suites: wheezy-backports
  • size: 1,408 kB
  • sloc: sh: 11,093; ansic: 395; makefile: 104
file content (381 lines) | stat: -rw-r--r-- 8,457 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
/* libmsv: MonkeySphere Validation library
 *   Copyright © 2011-2013  Clint Adams

 * libmsv is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 
 * libmsv is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 
 * You should have received a copy of the GNU General Public License
 * along with libmsv; if not, see <http://www.gnu.org/licenses/>.
*/

#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>

#include <jansson.h>

#include "msv/msv.h"

struct msv_ctxt
{
  char *socket_location;
  CURLcode cc;
};

extern const char *
msv_strerror (msv_ctxt_t ctx, int error_code)
{
  if (ctx)
    {
      switch (error_code)
	{
	case LIBMSV_ERROR_SUCCESS:
	  return "No error";
	case LIBMSV_ERROR_INVALID:
	  return "Agent reports invalid";
	case LIBMSV_ERROR_NOENVVAR:
	  return "Environment variable not set";
	case LIBMSV_ERROR_CURLINIT_FAILED:
	  return "curl_easy_init() failed!";
	case LIBMSV_ERROR_INCOMPATIBLE_AGENT:
	  return "Validation agent is incompatible";
	case LIBMSV_ERROR_BADARG:
	  return "Bad argument(s)";
	case LIBMSV_ERROR_CURLCODE:
	  return curl_easy_strerror (ctx->cc);
	default:
	  return "Unknown error";
	}
    }
  else
    return "Unknown context; misuse of msv_strerror";
}

static size_t
write_function (void *ptr, size_t size, size_t nmemb, void *userdata)
{
  char *ud;

  ud = malloc (size * nmemb + 1);
  memcpy (ud, ptr, size * nmemb);

  ud[size * nmemb] = '\0';

  *((char **) userdata) = (void *) ud;

  return size * nmemb;
}

extern msv_ctxt_t
msv_ctxt_init (const char *url)
{

  msv_ctxt_t ctx;

  ctx = malloc (sizeof (struct msv_ctxt));

  if (url)
    ctx->socket_location = strdup (url);
  else
    {
      ctx->socket_location =
	strdup (getenv ("MONKEYSPHERE_VALIDATION_AGENT_SOCKET"));
    }
  return ctx;
}

extern void
msv_ctxt_destroy (msv_ctxt_t ctx)
{
  if (ctx)
    {
      if (ctx->socket_location)
	free (ctx->socket_location);
      free (ctx);
    }
}

extern int
msv_check_msva (msv_ctxt_t ctx)
{
  CURL *c;
  char *buf;
  json_t *j, *k;
  json_error_t je;
  void *iter;
  int protoversion, available, rv;

  if (!ctx)
    return LIBMSV_ERROR_BADARG;
  if (ctx->socket_location == NULL)
    return LIBMSV_ERROR_NOENVVAR;

  c = curl_easy_init ();
  if (c == NULL)
    return LIBMSV_ERROR_CURLINIT_FAILED;

  ctx->cc = curl_easy_setopt (c, CURLOPT_URL, ctx->socket_location);
  if (ctx->cc)
    {
      curl_easy_cleanup (c);
      return LIBMSV_ERROR_CURLCODE;
    }
  ctx->cc = curl_easy_setopt (c, CURLOPT_WRITEFUNCTION, write_function);
  if (ctx->cc)
    {
      curl_easy_cleanup (c);
      return LIBMSV_ERROR_CURLCODE;
    }
  ctx->cc = curl_easy_setopt (c, CURLOPT_WRITEDATA, &buf);
  if (ctx->cc)
    {
      curl_easy_cleanup (c);
      return LIBMSV_ERROR_CURLCODE;
    }

  ctx->cc = curl_easy_perform (c);
  if (ctx->cc)
    {
      curl_easy_cleanup (c);
      return LIBMSV_ERROR_CURLCODE;
    }

  if ((j = json_loads (buf, 0, &je)))
    {
      free (buf);

      iter = json_object_iter_at (j, "protoversion");
      if (iter)
	{
	  k = json_object_iter_value (iter);

	  json_unpack (k, "i", &protoversion);

	  iter = json_object_iter_at (j, "available");
	  if (iter)
	    {
	      k = json_object_iter_value (iter);

	      json_unpack (k, "b", &available);

	      rv = 0;
	    }
	  else
	    {
	      rv = LIBMSV_ERROR_UNEXPECTED_RESPONSE;
	    }
	}
      else
	{
	  rv = LIBMSV_ERROR_UNEXPECTED_RESPONSE;
	}
      json_decref (j);

    }
  else
    {
      rv = LIBMSV_ERROR_UNEXPECTED_RESPONSE;
    }
  curl_easy_cleanup (c);
  if (rv)
    {
      return rv;
    }
  else
    {
      if (protoversion == 1 && available == 1)
	return LIBMSV_ERROR_SUCCESS;
      else
	return LIBMSV_ERROR_INCOMPATIBLE_AGENT;
    }
}

extern int
msv_query_agent (msv_ctxt_t ctx, struct msv_query q,
		 struct msv_response **response_ptr)
{

  int oldurllen, rv = 0;
  CURL *c;
  CURLcode cc;
  char *buf, *req = NULL, *reviewurl;
  json_t *j, *k, *jreq, *pkc, *peer, *j_pkcdata, *j_pkctype, *j_peername,
    *j_peertype, *j_context;
  json_error_t je;
  void *iter;
  struct curl_slist *slist = NULL;
  struct msv_response *response;

  if (!response_ptr)
    return LIBMSV_ERROR_BADARG;

  *response_ptr = NULL;

  if (!ctx)
    return LIBMSV_ERROR_BADARG;
  if (ctx->socket_location == NULL)
    return LIBMSV_ERROR_NOENVVAR;


  if (!(q.context && q.peertype && q.peername && q.pkctype && q.pkcdata))
    return LIBMSV_ERROR_BADARG;

  jreq = json_object ();
  pkc = json_object ();
  peer = json_object ();

  response = malloc (sizeof (struct msv_response));
  *response_ptr = response;

  if ((j_pkcdata = json_string (q.pkcdata)) &&
      (j_pkctype = json_string (q.pkctype)) &&
      (j_peername = json_string (q.peername)) &&
      (j_peertype = json_string (q.peertype)) &&
      (j_context = json_string (q.context)) &&
      (json_object_set (pkc, "data", j_pkcdata) == 0) &&
      (json_object_set (pkc, "type", j_pkctype) == 0) &&
      (json_object_set (peer, "name", j_peername) == 0) &&
      (json_object_set (peer, "type", j_peertype) == 0) &&
      (json_object_set (jreq, "pkc", pkc) == 0) &&
      (json_object_set (jreq, "context", j_context) == 0) &&
      (json_object_set (jreq, "peer", peer) == 0))
    {
      req = json_dumps (jreq, JSON_PRESERVE_ORDER | JSON_COMPACT);
    }
  else
    {
      rv = LIBMSV_ERROR_BADARG;
    }

  if (j_pkcdata)
    json_decref (j_pkcdata);
  if (j_pkctype)
    json_decref (j_pkctype);
  if (j_peername)
    json_decref (j_peername);
  if (j_peertype)
    json_decref (j_peertype);
  if (j_context)
    json_decref (j_context);
  if (peer)
    json_decref (peer);
  if (pkc)
    json_decref (pkc);
  if (jreq)
    json_decref (jreq);

  if (rv)
    return rv;

  c = curl_easy_init ();
  if (c == NULL)
    {
      free (req);
      return LIBMSV_ERROR_CURLINIT_FAILED;
    }

  oldurllen = strlen (ctx->socket_location);
  reviewurl = malloc (oldurllen + 12);
  sprintf (reviewurl, "%s%s", ctx->socket_location, "/reviewcert");

  cc = curl_easy_setopt (c, CURLOPT_URL, reviewurl);
  free (reviewurl);
  if (cc)
    {
      curl_easy_cleanup (c);
      free (req);
      return LIBMSV_ERROR_CURLCODE;
    }
  cc = curl_easy_setopt (c, CURLOPT_WRITEFUNCTION, write_function);
  if (cc)
    {
      curl_easy_cleanup (c);
      free (req);
      return LIBMSV_ERROR_CURLCODE;
    }
  cc = curl_easy_setopt (c, CURLOPT_WRITEDATA, &buf);
  if (cc)
    {
      curl_easy_cleanup (c);
      free (req);
      return LIBMSV_ERROR_CURLCODE;
    }
  cc = curl_easy_setopt (c, CURLOPT_POST, 1);
  if (cc)
    {
      curl_easy_cleanup (c);
      free (req);
      return LIBMSV_ERROR_CURLCODE;
    }

  slist = curl_slist_append (slist, "Content-Type: application/json");
  slist = curl_slist_append (slist, "Connection: close");
  slist = curl_slist_append (slist, "Accept: application/json");
  slist = curl_slist_append (slist, "Expect:");
  cc = curl_easy_setopt (c, CURLOPT_HTTPHEADER, slist);
  if (cc)
    {
      curl_easy_cleanup (c);
      free (req);
      curl_slist_free_all (slist);
      return LIBMSV_ERROR_CURLCODE;
    }

  cc = curl_easy_setopt (c, CURLOPT_POSTFIELDS, (void *) req);
  if (cc)
    {
      curl_easy_cleanup (c);
      free (req);
      curl_slist_free_all (slist);
      return LIBMSV_ERROR_CURLCODE;
    }

  cc = curl_easy_perform (c);
  if (cc)
    {
      curl_easy_cleanup (c);
      free (req);
      curl_slist_free_all (slist);
      return LIBMSV_ERROR_CURLCODE;
    }

  j = json_loads (buf, 0, &je);
  free (buf);

  iter = json_object_iter_at (j, "valid");
  k = json_object_iter_value (iter);

  json_unpack (k, "b", &response->valid);

  iter = json_object_iter_at (j, "message");
  k = json_object_iter_value (iter);

  json_unpack (k, "s", &response->message);
  response->message = strdup (response->message);
  json_decref (j);

  curl_slist_free_all (slist);

  curl_easy_cleanup (c);
  free (req);

  return !(response->valid);
}

extern void
msv_response_destroy (struct msv_response *response)
{
  if (response)
    {
      if (response->message)
	free (response->message);
      free (response);
    }
}