summaryrefslogtreecommitdiff
path: root/src/testing/testing_api_cmd_recoup.c
blob: add54b87f92f083adbc8d4329c65043972eeb64b (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
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
/*
  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 testing/testing_api_cmd_recoup.c
 * @brief Implement the /revoke and /recoup test commands.
 * @author Marcello Stanisci
 */
#include "platform.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.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 RecoupState
{
  /**
   * 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;

  /**
   * Handle to the ongoing operation.
   */
  struct TALER_EXCHANGE_RecoupHandle *ph;

  /**
   * NULL if coin was not refreshed, otherwise reference
   * to the melt operation underlying @a coin_reference.
   */
  const char *melt_reference;

};


/**
 * Parser reference to a coin.
 *
 * @param coin_reference of format $LABEL['#' $INDEX]?
 * @param[out] cref where we return a copy of $LABEL
 * @param[out] idx where we set $INDEX
 * @return #GNUNET_SYSERR if $INDEX is present but not numeric
 */
static int
parse_coin_reference (const char *coin_reference,
                      char **cref,
                      unsigned int *idx)
{
  const char *index;

  /* We allow command references of the form "$LABEL#$INDEX" or
     just "$LABEL", which implies the index is 0. Figure out
     which one it is. */
  index = strchr (coin_reference, '#');
  if (NULL == index)
  {
    *idx = 0;
    *cref = GNUNET_strdup (coin_reference);
    return GNUNET_OK;
  }
  *cref = GNUNET_strndup (coin_reference,
                          index - coin_reference);
  if (1 != sscanf (index + 1,
                   "%u",
                   idx))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Numeric index (not `%s') required after `#' in command reference of command in %s:%u\n",
                index,
                __FILE__,
                __LINE__);
    GNUNET_free (*cref);
    *cref = NULL;
    return GNUNET_SYSERR;
  }
  return GNUNET_OK;
}


/**
 * Check the result of the recoup 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
 *        /recoup request
 * @param reserve_pub public key of the reserve receiving the recoup, NULL if refreshed or on error
 * @param old_coin_pub public key of the dirty coin, NULL if not refreshed or on error
 * @param full_response raw response from the exchange.
 */
static void
recoup_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 struct TALER_CoinSpendPublicKeyP *old_coin_pub,
           const json_t *full_response)
{
  struct RecoupState *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;
  char *cref;
  unsigned int idx;

  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;
  }

  if (GNUNET_OK !=
      parse_coin_reference (ps->coin_reference,
                            &cref,
                            &idx))
  {
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  reserve_cmd = TALER_TESTING_interpreter_lookup_command
                  (is, cref);
  GNUNET_free (cref);

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

  switch (http_status)
  {
  case MHD_HTTP_OK:
    /* first, check amount */
    {
      struct TALER_Amount expected_amount;

      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 mismatch to command %s\n",
                    cmd->label);
        json_dumpf (full_response, stderr, 0);
        TALER_TESTING_interpreter_fail (is);
        return;
      }
    }
    /* now, check old_coin_pub or reserve_pub, respectively */
    if (NULL != ps->melt_reference)
    {
      const struct TALER_TESTING_Command *melt_cmd;
      const struct TALER_CoinSpendPrivateKeyP *dirty_priv;
      struct TALER_CoinSpendPublicKeyP oc;

      melt_cmd = TALER_TESTING_interpreter_lookup_command (is,
                                                           ps->melt_reference);
      if (NULL == melt_cmd)
      {
        GNUNET_break (0);
        TALER_TESTING_interpreter_fail (is);
        return;
      }
      if (GNUNET_OK !=
          TALER_TESTING_get_trait_coin_priv (melt_cmd,
                                             0,
                                             &dirty_priv))
      {
        GNUNET_break (0);
        TALER_TESTING_interpreter_fail (is);
        return;
      }
      GNUNET_CRYPTO_eddsa_key_get_public (&dirty_priv->eddsa_priv,
                                          &oc.eddsa_pub);
      if (0 != GNUNET_memcmp (&oc,
                              old_coin_pub))
      {
        GNUNET_break (0);
        TALER_TESTING_interpreter_fail (is);
        return;
      }
    }
    else
    {
      const struct TALER_ReservePrivateKeyP *reserve_priv;
      struct TALER_ReservePublicKeyP rp;

      if (NULL == reserve_pub)
      {
        GNUNET_break (0);
        TALER_TESTING_interpreter_fail (is);
        return;
      }
      if (GNUNET_OK != TALER_TESTING_get_trait_reserve_priv
            (reserve_cmd, idx, &reserve_priv))
      {
        GNUNET_break (0);
        TALER_TESTING_interpreter_fail (is);
        return;
      }
      GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv,
                                          &rp.eddsa_pub);
      if (0 != GNUNET_memcmp (reserve_pub, &rp))
      {
        GNUNET_break (0);
        TALER_TESTING_interpreter_fail (is);
        return;
      }
    }
    break;
  default:
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                "Unmanaged HTTP status code %u.\n",
                http_status);
    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
recoup_run (void *cls,
            const struct TALER_TESTING_Command *cmd,
            struct TALER_TESTING_Interpreter *is)
{
  struct RecoupState *ps = cls;
  const struct TALER_TESTING_Command *coin_cmd;
  const struct TALER_CoinSpendPrivateKeyP *coin_priv;
  const struct TALER_DenominationBlindingKeyP *blinding_key;
  const struct TALER_EXCHANGE_DenomPublicKey *denom_pub;
  const struct TALER_DenominationSignature *coin_sig;
  struct TALER_PlanchetSecretsP planchet;
  char *cref;
  unsigned int idx;

  ps->is = is;
  if (GNUNET_OK !=
      parse_coin_reference (ps->coin_reference,
                            &cref,
                            &idx))
  {
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  coin_cmd = TALER_TESTING_interpreter_lookup_command
               (is, cref);
  GNUNET_free (cref);

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

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

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

  if (GNUNET_OK != TALER_TESTING_get_trait_denom_sig
        (coin_cmd, idx, &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_recoup (is->exchange,
                                  denom_pub,
                                  coin_sig,
                                  &planchet,
                                  NULL != ps->melt_reference,
                                  recoup_cb,
                                  ps);
  GNUNET_assert (NULL != ps->ph);
}


/**
 * Cleanup the state.
 *
 * @param cls closure, must be a `struct RevokeState`.
 * @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 "recoup" CMD state, and possibly cancel
 * a pending operation thereof.
 *
 * @param cls closure.
 * @param cmd the command which is being cleaned up.
 */
static void
recoup_cleanup (void *cls,
                const struct TALER_TESTING_Command *cmd)
{
  struct RecoupState *ps = cls;
  if (NULL != ps->ph)
  {
    TALER_EXCHANGE_recoup_cancel (ps->ph);
    ps->ph = NULL;
  }
  GNUNET_free (ps);
}


/**
 * Offer internal data from a "revoke" CMD to other CMDs.
 *
 * @param cls closure
 * @param[out] ret 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,
               const 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 "recoup" 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.
 * @param melt_reference NULL if coin was not refreshed
 * @return the command.
 */
struct TALER_TESTING_Command
TALER_TESTING_cmd_recoup (const char *label,
                          unsigned int expected_response_code,
                          const char *coin_reference,
                          const char *amount,
                          const char *melt_reference)
{
  struct RecoupState *ps;

  ps = GNUNET_new (struct RecoupState);
  ps->expected_response_code = expected_response_code;
  ps->coin_reference = coin_reference;
  ps->amount = amount;
  ps->melt_reference = melt_reference;
  {
    struct TALER_TESTING_Command cmd = {
      .cls = ps,
      .label = label,
      .run = &recoup_run,
      .cleanup = &recoup_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;

  rs = GNUNET_new (struct RevokeState);
  rs->expected_response_code = expected_response_code;
  rs->coin_reference = coin_reference;
  rs->config_filename = config_filename;
  {
    struct TALER_TESTING_Command cmd = {
      .cls = rs,
      .label = label,
      .run = &revoke_run,
      .cleanup = &revoke_cleanup,
      .traits = &revoke_traits
    };

    return cmd;
  }
}