summaryrefslogtreecommitdiff
path: root/src/exchange-lib/testing_api_cmd_payback.c
blob: 43118ef0a98e4ab227ed758c7c4e3c71bc364860 (plain)
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
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
/*
  This file is part of TALER
  Copyright (C) 2014-2018 Taler Systems SA

  TALER 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, or
  (at your option) any later version.

  TALER 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 TALER; see the file COPYING.  If not, see
  <http://www.gnu.org/licenses/>
*/

/**
 * @file exchange/testing_api_cmd_payback.c
 * @brief Implement the /revoke and /payback test commands.
 * @author Marcello Stanisci
 */

#include "platform.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.h>
#include "exchange_api_handle.h"
#include "taler_testing_lib.h"


/**
 * State for a "revoke" CMD.
 */
struct RevokeState
{
  /**
   * Expected HTTP status code.
   */
  unsigned int expected_response_code;

  /**
   * Command that offers a denomination to revoke.
   */
  const char *coin_reference;

  /**
   * The interpreter state.
   */
  struct TALER_TESTING_Interpreter *is;

  /**
   * The revoke process handle.
   */
  struct GNUNET_OS_Process *revoke_proc;

  /**
   * Configuration file name.
   */
  const char *config_filename;

  /**
   * Encoding of the denomination (to revoke) public key hash.
   */
  char *dhks;

};


/**
 * State for a "pay back" CMD.
 */
struct PaybackState
{
  /**
   * Expected HTTP status code.
   */
  unsigned int expected_response_code;

  /**
   * Command that offers a reserve private key,
   * plus a coin to be paid back.
   */
  const char *coin_reference;

  /**
   * The interpreter state.
   */
  struct TALER_TESTING_Interpreter *is;

  /**
   * Amount expected to be paid back.
   */
  const char *amount;

  /**
   * Connection to the exchange.
   */
  struct TALER_EXCHANGE_Handle *exchange;

  /**
   * Handle to the ongoing operation.
   */
  struct TALER_EXCHANGE_PaybackHandle *ph;
};

/**
 * Check the result of the payback request: checks whether
 * the HTTP response code is good, and that the coin that
 * was paid back belonged to the right reserve.
 *
 * @param cls closure
 * @param http_status HTTP response code.
 * @param ec taler-specific error code.
 * @param amount amount the exchange will wire back for this coin.
 * @param timestamp what time did the exchange receive the
 *        /payback request
 * @param reserve_pub public key of the reserve affected by the
 *        payback.
 * @param full_response raw response from the exchange.
 */
static void
payback_cb (void *cls,
            unsigned int http_status,
            enum TALER_ErrorCode ec,
            const struct TALER_Amount *amount,
            struct GNUNET_TIME_Absolute timestamp,
            const struct TALER_ReservePublicKeyP *reserve_pub,
            const json_t *full_response)
{

  struct PaybackState *ps = cls;
  struct TALER_TESTING_Interpreter *is = ps->is;
  struct TALER_TESTING_Command *cmd = &is->commands[is->ip];
  const struct TALER_TESTING_Command *reserve_cmd;
  struct TALER_ReservePrivateKeyP *reserve_priv;
  struct TALER_ReservePublicKeyP rp;
  struct TALER_Amount expected_amount;

  ps->ph = NULL;
  if (ps->expected_response_code != http_status)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Unexpected response code %u to command %s in %s:%u\n",
                http_status,
                cmd->label,
                __FILE__,
                __LINE__);
    json_dumpf (full_response, stderr, 0);
    fprintf (stderr, "\n");
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  reserve_cmd = TALER_TESTING_interpreter_lookup_command
    (is, ps->coin_reference);

  if (NULL == reserve_cmd)
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  if (GNUNET_OK != TALER_TESTING_get_trait_reserve_priv
    (reserve_cmd, 0, &reserve_priv))
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv,
                                      &rp.eddsa_pub);

  switch (http_status)
  {
  case MHD_HTTP_OK:
    if (GNUNET_OK != TALER_string_to_amount
      (ps->amount, &expected_amount))
    {
      GNUNET_break (0);
      TALER_TESTING_interpreter_fail (is);
      return;
    }
    if (0 != TALER_amount_cmp (amount, &expected_amount))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Total amount missmatch to command %s\n",
                  cmd->label);
      json_dumpf (full_response, stderr, 0);
      TALER_TESTING_interpreter_fail (is);
      return;
    }
    if (0 != memcmp (reserve_pub, &rp,
                     sizeof (struct TALER_ReservePublicKeyP)))
    {
      GNUNET_break (0);
      TALER_TESTING_interpreter_fail (is);
      return;
    }
    break;
  default:
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                "Unmanaged HTTP status code.\n");
    break;
  }
  TALER_TESTING_interpreter_next (is);
}


/**
 * Run the command.
 *
 * @param cls closure.
 * @param cmd the command to execute.
 * @param is the interpreter state.
 */
static void
payback_run (void *cls,
             const struct TALER_TESTING_Command *cmd,
             struct TALER_TESTING_Interpreter *is)
{
  struct PaybackState *ps = cls;
  const struct TALER_TESTING_Command *coin_cmd;
  const struct TALER_CoinSpendPrivateKeyP *coin_priv;
  struct TALER_DenominationBlindingKeyP *blinding_key;
  const struct TALER_EXCHANGE_DenomPublicKey *denom_pub;
  struct TALER_DenominationSignature *coin_sig;
  struct TALER_PlanchetSecretsP planchet;

  ps->is = is;
  ps->exchange = is->exchange;
  coin_cmd = TALER_TESTING_interpreter_lookup_command
    (is, ps->coin_reference);

  if (NULL == coin_cmd)
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  if (GNUNET_OK != TALER_TESTING_get_trait_coin_priv
    (coin_cmd, 0, &coin_priv))
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  if (GNUNET_OK != TALER_TESTING_get_trait_blinding_key
    (coin_cmd, 0, &blinding_key))
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }
  planchet.coin_priv = *coin_priv;
  planchet.blinding_key = *blinding_key;

  if (GNUNET_OK != TALER_TESTING_get_trait_denom_pub
    (coin_cmd, 0, &denom_pub))
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  if (GNUNET_OK != TALER_TESTING_get_trait_denom_sig
     (coin_cmd, 0, &coin_sig))
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
              "Trying to get '%s..' paid back\n",
              TALER_B2S (&denom_pub->h_key));

  ps->ph = TALER_EXCHANGE_payback (ps->exchange,
                                   denom_pub,
                                   coin_sig,
                                   &planchet,
                                   payback_cb,
                                   ps);
  GNUNET_assert (NULL != ps->ph);
}


/**
 * Cleanup the state.
 *
 * @param cls closure, typically a #struct WireState.
 * @param cmd the command which is being cleaned up.
 */
static void
revoke_cleanup (void *cls,
                const struct TALER_TESTING_Command *cmd)
{

  struct RevokeState *rs = cls;

  if (NULL != rs->revoke_proc)
  {
    GNUNET_break (0 == GNUNET_OS_process_kill
      (rs->revoke_proc, SIGKILL));
    GNUNET_OS_process_wait (rs->revoke_proc);
    GNUNET_OS_process_destroy (rs->revoke_proc);
    rs->revoke_proc = NULL;
  }

  GNUNET_free_non_null (rs->dhks);
  GNUNET_free (rs);
}


/**
 * Cleanup the "payback" CMD state, and possibly cancel
 * a pending operation thereof.
 *
 * @param cls closure.
 * @param cmd the command which is being cleaned up.
 */
static void
payback_cleanup (void *cls,
                 const struct TALER_TESTING_Command *cmd)
{
  struct PaybackState *ps = cls;
  if (NULL != ps->ph)
  {
    TALER_EXCHANGE_payback_cancel (ps->ph);
    ps->ph = NULL;
  }
  GNUNET_free (ps);
}


/**
 * Offer internal data from a "revoke" CMD to other CMDs.
 *
 * @param cls closure
 * @param ret[out] result (could be anything)
 * @param trait name of the trait
 * @param index index number of the object to offer.
 * @return #GNUNET_OK on success
 */
static int
revoke_traits (void *cls,
               void **ret,
               const char *trait,
               unsigned int index)
{

  struct RevokeState *rs = cls;

  struct TALER_TESTING_Trait traits[] = {
    /* Needed by the handler which waits the proc'
     * death and calls the next command */
    TALER_TESTING_make_trait_process (0, &rs->revoke_proc),
    TALER_TESTING_trait_end ()
  };

  return TALER_TESTING_get_trait (traits,
                                  ret,
                                  trait,
                                  index);
}

/**
 * Run the "revoke" command.  The core of the function
 * is to call the "keyup" utility passing it the base32
 * encoding of the denomination to revoke.
 *
 * @param cls closure.
 * @param cmd the command to execute.
 * @param is the interpreter state.
 */
static void
revoke_run (void *cls,
            const struct TALER_TESTING_Command *cmd,
            struct TALER_TESTING_Interpreter *is)
{
  struct RevokeState *rs = cls;
  const struct TALER_TESTING_Command *coin_cmd;
  const struct TALER_EXCHANGE_DenomPublicKey *denom_pub;

  rs->is = is;
  /* Get denom pub from trait */
  coin_cmd = TALER_TESTING_interpreter_lookup_command
    (is, rs->coin_reference);

  if (NULL == coin_cmd)
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  GNUNET_assert (GNUNET_OK == TALER_TESTING_get_trait_denom_pub
    (coin_cmd, 0, &denom_pub));

  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
              "Trying to revoke denom '%s..'\n",
              TALER_B2S (&denom_pub->h_key));

  rs->dhks = GNUNET_STRINGS_data_to_string_alloc
    (&denom_pub->h_key, sizeof (struct GNUNET_HashCode));

  rs->revoke_proc = GNUNET_OS_start_process
    (GNUNET_NO,
     GNUNET_OS_INHERIT_STD_ALL,
     NULL, NULL, NULL,
     "taler-exchange-keyup",
     "taler-exchange-keyup",
     "-c", rs->config_filename,
     "-r", rs->dhks,
     NULL);

  if (NULL == rs->revoke_proc)
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }
  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
              "Revoke is ongoing..\n");

  is->reload_keys = GNUNET_OK;
  TALER_TESTING_wait_for_sigchld (is);
}


/**
 * Make a "payback" command.
 *
 * @param label the command label
 * @param expected_response_code expected HTTP status code
 * @param coin_reference reference to any command which
 *        offers a coin & reserve private key.
 * @param amount denomination to pay back.
 *
 * @return the command.
 */
struct TALER_TESTING_Command
TALER_TESTING_cmd_payback (const char *label,
                           unsigned int expected_response_code,
                           const char *coin_reference,
                           const char *amount)
{
  struct PaybackState *ps;
  struct TALER_TESTING_Command cmd;

  ps = GNUNET_new (struct PaybackState);
  ps->expected_response_code = expected_response_code;
  ps->coin_reference = coin_reference;
  ps->amount = amount;

  cmd.cls = ps;
  cmd.label = label;
  cmd.run = &payback_run;
  cmd.cleanup = &payback_cleanup;

  return cmd;
}


/**
 * Make a "revoke" command.
 *
 * @param label the command label.
 * @param expected_response_code expected HTTP status code.
 * @param coin_reference reference to a CMD that will offer the
 *        denomination to revoke.
 * @param config_filename configuration file name.
 *
 * @return the command.
 */
struct TALER_TESTING_Command
TALER_TESTING_cmd_revoke (const char *label,
                          unsigned int expected_response_code,
                          const char *coin_reference,
                          const char *config_filename)
{

  struct RevokeState *rs;
  struct TALER_TESTING_Command cmd;

  rs = GNUNET_new (struct RevokeState);
  rs->expected_response_code = expected_response_code;
  rs->coin_reference = coin_reference;
  rs->config_filename = config_filename;

  cmd.cls = rs;
  cmd.label = label;
  cmd.run = &revoke_run;
  cmd.cleanup = &revoke_cleanup;
  cmd.traits = &revoke_traits;

  return cmd;
}