aboutsummaryrefslogtreecommitdiff
path: root/src/bank-lib/bank_api_admin.c
blob: 5240a372451733320bdac5f036b4e7739d536c1b (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
/*
  This file is part of TALER
  Copyright (C) 2015, 2016, 2017 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 bank-lib/bank_api_admin.c
 * @brief Implementation of the /admin/ requests of the bank's HTTP API
 * @author Christian Grothoff
 */
#include "platform.h"
#include "bank_api_common.h"
#include <microhttpd.h> /* just for HTTP status codes */
#include "taler_signatures.h"
#include "taler_curl_lib.h"


/**
 * @brief An admin/add/incoming Handle
 */
struct TALER_BANK_AdminAddIncomingHandle
{

  /**
   * The url for this request.
   */
  char *request_url;

  /**
   * POST context.
   */
  struct TEAH_PostContext post_ctx;

  /**
   * Handle for the request.
   */
  struct GNUNET_CURL_Job *job;

  /**
   * Function to call with the result.
   */
  TALER_BANK_AdminAddIncomingResultCallback cb;

  /**
   * Closure for @a cb.
   */
  void *cb_cls;

};


/**
 * Function called when we're done processing the
 * HTTP /admin/add/incoming request.
 *
 * @param cls the `struct TALER_BANK_AdminAddIncomingHandle`
 * @param response_code HTTP response code, 0 on error
 * @param response parsed JSON result, NULL on error
 */
static void
handle_admin_add_incoming_finished (void *cls,
                                    long response_code,
                                    const void *response)
{
  struct TALER_BANK_AdminAddIncomingHandle *aai = cls;
  uint64_t row_id = UINT64_MAX;
  struct GNUNET_TIME_Absolute timestamp;
  enum TALER_ErrorCode ec;
  const json_t *j = response;

  aai->job = NULL;
  timestamp = GNUNET_TIME_UNIT_FOREVER_ABS;
  switch (response_code)
  {
  case 0:
    ec = TALER_EC_INVALID_RESPONSE;
    break;
  case MHD_HTTP_OK:
    {
      struct GNUNET_JSON_Specification spec[] = {
        GNUNET_JSON_spec_uint64 ("row_id",
                                 &row_id),
        GNUNET_JSON_spec_absolute_time ("timestamp",
                                        &timestamp),
        GNUNET_JSON_spec_end ()
      };

      if (GNUNET_OK !=
          GNUNET_JSON_parse (j,
                             spec,
                             NULL, NULL))
      {
        GNUNET_break_op (0);
        response_code = 0;
        ec = TALER_EC_INVALID_RESPONSE;
        break;
      }
      ec = TALER_EC_NONE;
    }
    break;
  case MHD_HTTP_BAD_REQUEST:
    /* This should never happen, either us or the bank is buggy
       (or API version conflict); just pass JSON reply to the application */
    ec = TALER_BANK_parse_ec_ (j);
    break;
  case MHD_HTTP_FORBIDDEN:
    /* Access denied */
    ec = TALER_BANK_parse_ec_ (j);
    break;
  case MHD_HTTP_UNAUTHORIZED:
    /* Nothing really to verify, bank says one of the signatures is
       invalid; as we checked them, this should never happen, we
       should pass the JSON reply to the application */
    ec = TALER_BANK_parse_ec_ (j);
    break;
  case MHD_HTTP_NOT_FOUND:
    /* Nothing really to verify, this should never
       happen, we should pass the JSON reply to the application */
    ec = TALER_BANK_parse_ec_ (j);
    break;
  case MHD_HTTP_NOT_ACCEPTABLE:
    /* Nothing really to verify, this should never
       happen, we should pass the JSON reply to the application */
    ec = TALER_BANK_parse_ec_ (j);
    break;
  case MHD_HTTP_INTERNAL_SERVER_ERROR:
    /* Server had an internal issue; we should retry, but this API
       leaves this to the application */
    ec = TALER_BANK_parse_ec_ (j);
    break;
  default:
    /* unexpected response code */
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Unexpected response code %u\n",
                (unsigned int) response_code);
    GNUNET_break (0);
    ec = TALER_BANK_parse_ec_ (j);
    response_code = 0;
    break;
  }
  aai->cb (aai->cb_cls,
           response_code,
           ec,
           row_id,
           timestamp,
           j);
  TALER_BANK_admin_add_incoming_cancel (aai);
}


/**
 * Notify the bank that we have received an incoming transaction
 * which fills a reserve.  Note that this API is an administrative
 * API and thus not accessible to typical bank clients, but only
 * to the operators of the bank.
 *
 * @param ctx curl context for the event loop
 * @param bank_base_url URL of the bank (used to execute this request)
 * @param auth authentication data to send to the bank
 * @param exchange_base_url base URL of the exchange (for tracking)
 * @param subject wire transfer subject for the transfer
 * @param amount amount that was deposited
 * @param debit_account_no account number to withdraw from (53 bits at most)
 * @param credit_account_no account number to deposit into (53 bits at most)
 * @param res_cb the callback to call when the final result for this request is available
 * @param res_cb_cls closure for the above callback
 * @return NULL
 *         if the inputs are invalid (i.e. invalid amount).
 *         In this case, the callback is not called.
 */
struct TALER_BANK_AdminAddIncomingHandle *
TALER_BANK_admin_add_incoming (struct GNUNET_CURL_Context *ctx,
                               const char *bank_base_url,
                               const struct TALER_BANK_AuthenticationData *auth,
                               const char *exchange_base_url,
                               const char *subject,
                               const struct TALER_Amount *amount,
                               uint64_t debit_account_no,
                               uint64_t credit_account_no,
                               TALER_BANK_AdminAddIncomingResultCallback res_cb,
                               void *res_cb_cls)
{
  struct TALER_BANK_AdminAddIncomingHandle *aai;
  json_t *admin_obj;
  CURL *eh;

  if (NULL == exchange_base_url)
  {
    GNUNET_break (0);
    return NULL;
  }
  admin_obj = json_pack ("{s:{s:s}, s:s, s:s, s:o, s:I, s:I}",
                         "auth", "type", "basic",
                         "exchange_url", exchange_base_url,
                         "subject", subject,
                         "amount", TALER_JSON_from_amount (amount),
                         "debit_account", (json_int_t) debit_account_no,
                         "credit_account", (json_int_t) credit_account_no);
  if (NULL == admin_obj)
  {
    GNUNET_break (0);
    return NULL;
  }
  aai = GNUNET_new (struct TALER_BANK_AdminAddIncomingHandle);
  aai->cb = res_cb;
  aai->cb_cls = res_cb_cls;
  aai->request_url = TALER_BANK_path_to_url_ (bank_base_url,
                                              "/admin/add/incoming");
  aai->post_ctx.headers = TALER_BANK_make_auth_header_ (auth);

  GNUNET_assert
    (NULL != (aai->post_ctx.headers = curl_slist_append
                                        (aai->post_ctx.headers,
                                        "Content-Type: application/json")));

  eh = curl_easy_init ();

  GNUNET_assert (GNUNET_OK ==
                 TALER_curl_easy_post (&aai->post_ctx, eh, admin_obj));

  json_decref (admin_obj);

  GNUNET_assert (CURLE_OK ==
                 curl_easy_setopt (eh,
                                   CURLOPT_URL,
                                   aai->request_url));

  aai->job = GNUNET_CURL_job_add2 (ctx,
                                   eh,
                                   aai->post_ctx.headers,
                                   &handle_admin_add_incoming_finished,
                                   aai);
  return aai;
}


/**
 * Cancel an add incoming.  This function cannot be used on a request
 * handle if a response is already served for it.
 *
 * @param aai the admin add incoming request handle
 */
void
TALER_BANK_admin_add_incoming_cancel (struct
                                      TALER_BANK_AdminAddIncomingHandle *aai)
{
  if (NULL != aai->job)
  {
    GNUNET_CURL_job_cancel (aai->job);
    aai->job = NULL;
  }
  TALER_curl_easy_post_finished (&aai->post_ctx);
  GNUNET_free (aai->request_url);
  GNUNET_free (aai);
}


/* end of bank_api_admin.c */