fix cyclic dependency by combining exchange-lib and auditor-lib directories

1 files changed, 0 insertions, 597 deletions

diff --git a/src/exchange-lib/exchange_api_deposit.c b/src/exchange-lib/exchange_api_deposit.c
deleted file mode 100644
index 23066c7d..00000000
--- a/src/exchange-lib/exchange_api_deposit.c
+++ /dev/null
@@ -1,597 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2014, 2015, 2018 GNUnet e.V.
-
-  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-lib/exchange_api_deposit.c
- * @brief Implementation of the /deposit request of the exchange's HTTP API
- * @author Sree Harsha Totakura <sreeharsha@totakura.in>
- * @author Christian Grothoff
- */
-#include "platform.h"
-#include <jansson.h>
-#include <microhttpd.h> /* just for HTTP status codes */
-#include <gnunet/gnunet_util_lib.h>
-#include <gnunet/gnunet_json_lib.h>
-#include <gnunet/gnunet_curl_lib.h>
-#include "taler_json_lib.h"
-#include "taler_auditor_service.h"
-#include "taler_exchange_service.h"
-#include "exchange_api_handle.h"
-#include "taler_signatures.h"
-#include "curl_defaults.h"
-
-
-/**
- * @brief A Deposit Handle
- */
-struct TALER_EXCHANGE_DepositHandle
-{
-
-  /**
-   * The connection to exchange this request handle will use
-   */
-  struct TALER_EXCHANGE_Handle *exchange;
-
-  /**
-   * The url for this request.
-   */
-  char *url;
-
-  /**
-   * JSON encoding of the request to POST.
-   */
-  char *json_enc;
-
-  /**
-   * Handle for the request.
-   */
-  struct GNUNET_CURL_Job *job;
-
-  /**
-   * Function to call with the result.
-   */
-  TALER_EXCHANGE_DepositResultCallback cb;
-
-  /**
-   * Closure for @a cb.
-   */
-  void *cb_cls;
-
-  /**
-   * Information the exchange should sign in response.
-   */
-  struct TALER_DepositConfirmationPS depconf;
-
-  /**
-   * Value of the /deposit transaction, including fee.
-   */
-  struct TALER_Amount amount_with_fee;
-
-  /**
-   * Total value of the coin being transacted with.
-   */
-  struct TALER_Amount coin_value;
-  
-};
-
-
-/**
- * Signature of functions called with the result from our call to the
- * auditor's /deposit-confirmation handler.
- *
- * @param cls closure
- * @param http_status HTTP status code, 200 on success
- * @param ec taler protocol error status code, 0 on success
- * @param json raw json response
- */
-static void
-acc_confirmation_cb (void *cls,
-		     unsigned int http_status,
-		     enum TALER_ErrorCode ec,
-		     const json_t *json)
-{
-  /* FIXME: clean up state, some logging on errors! */
-}
-
-
-/**
- * Verify that the signature on the "200 OK" response
- * from the exchange is valid.
- *
- * @param dh deposit handle
- * @param json json reply with the signature
- * @param exchange_sig[out] set to the exchange's signature
- * @param exchange_pub[out] set to the exchange's public key
- * @return #GNUNET_OK if the signature is valid, #GNUNET_SYSERR if not
- */
-static int
-verify_deposit_signature_ok (const struct TALER_EXCHANGE_DepositHandle *dh,
-                             const json_t *json,
-			     struct TALER_ExchangeSignatureP *exchange_sig,
-                             struct TALER_ExchangePublicKeyP *exchange_pub)
-{
-  const struct TALER_EXCHANGE_Keys *key_state;
-  struct GNUNET_JSON_Specification spec[] = {
-    GNUNET_JSON_spec_fixed_auto ("sig", exchange_sig),
-    GNUNET_JSON_spec_fixed_auto ("pub", exchange_pub),
-    GNUNET_JSON_spec_end()
-  };
-
-  if (GNUNET_OK !=
-      GNUNET_JSON_parse (json,
-                         spec,
-                         NULL, NULL))
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  key_state = TALER_EXCHANGE_get_keys (dh->exchange);
-  if (GNUNET_OK !=
-      TALER_EXCHANGE_test_signing_key (key_state,
-                                       exchange_pub))
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  if (GNUNET_OK !=
-      GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_EXCHANGE_CONFIRM_DEPOSIT,
-                                  &dh->depconf.purpose,
-                                  &exchange_sig->eddsa_signature,
-                                  &exchange_pub->eddsa_pub))
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  if (0 /* #5447: replace with "for all auditors, if auditor selected for DC notification... */)
-  {
-    struct TALER_AUDITOR_DepositConfirmationHandle *dch;
-    const struct TALER_EXCHANGE_SigningPublicKey *spk;
-    struct TALER_Amount amount_without_fee;
-    
-    spk = TALER_EXCHANGE_get_signing_key_details (key_state,
-						  exchange_pub);
-    GNUNET_assert (NULL != spk);
-    TALER_amount_ntoh (&amount_without_fee,
-		       &dh->depconf.amount_without_fee);
-    dch = TALER_AUDITOR_deposit_confirmation (NULL /* FIXME: auditor */,
-					      &dh->depconf.h_wire,
-					      &dh->depconf.h_contract_terms,
-					      GNUNET_TIME_absolute_ntoh (dh->depconf.timestamp),
-					      GNUNET_TIME_absolute_ntoh (dh->depconf.refund_deadline),
-					      &amount_without_fee,
-					      &dh->depconf.coin_pub,
-					      &dh->depconf.merchant,
-					      exchange_pub,
-					      exchange_sig,
-					      &key_state->master_pub,
-					      spk->valid_from,
-					      spk->valid_until,
-					      spk->valid_legal,
-					      &spk->master_sig,
-					      &acc_confirmation_cb,
-					      NULL /* FIXME: context! */);
-  }
-
-  
-  return GNUNET_OK;
-}
-
-
-/**
- * Verify that the signatures on the "403 FORBIDDEN" response from the
- * exchange demonstrating customer double-spending are valid.
- *
- * @param dh deposit handle
- * @param json json reply with the signature(s) and transaction history
- * @return #GNUNET_OK if the signature(s) is valid, #GNUNET_SYSERR if not
- */
-static int
-verify_deposit_signature_forbidden (const struct TALER_EXCHANGE_DepositHandle *dh,
-                                    const json_t *json)
-{
-  json_t *history;
-  struct TALER_Amount total;
-
-  history = json_object_get (json,
-                             "history");
-  if (GNUNET_OK !=
-      TALER_EXCHANGE_verify_coin_history (dh->coin_value.currency,
-					  &dh->depconf.coin_pub,
-					  history,
-					  &total))
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  if (GNUNET_OK !=
-      TALER_amount_add (&total,
-                        &total,
-                        &dh->amount_with_fee))
-  {
-    /* clearly not OK if our transaction would have caused
-       the overflow... */
-    return GNUNET_OK;
-  }
-
-  if (0 >= TALER_amount_cmp (&total,
-                             &dh->coin_value))
-  {
-    /* transaction should have still fit */
-    GNUNET_break (0);
-    return GNUNET_SYSERR;
-  }
-  /* everything OK, proof of double-spending was provided */
-  return GNUNET_OK;
-}
-
-
-/**
- * Function called when we're done processing the
- * HTTP /deposit request.
- *
- * @param cls the `struct TALER_EXCHANGE_DepositHandle`
- * @param response_code HTTP response code, 0 on error
- * @param response parsed JSON result, NULL on error
- */
-static void
-handle_deposit_finished (void *cls,
-                         long response_code,
-                         const void *response)
-{
-  struct TALER_EXCHANGE_DepositHandle *dh = cls;
-  struct TALER_ExchangeSignatureP exchange_sig;
-  struct TALER_ExchangePublicKeyP exchange_pub;
-  struct TALER_ExchangeSignatureP *es = NULL;
-  struct TALER_ExchangePublicKeyP *ep = NULL;
-  const json_t *j = response;
-
-  dh->job = NULL;
-  switch (response_code)
-  {
-  case 0:
-    break;
-  case MHD_HTTP_OK:
-    if (GNUNET_OK !=
-        verify_deposit_signature_ok (dh,
-                                     j,
-				     &exchange_sig,
-                                     &exchange_pub))
-    {
-      GNUNET_break_op (0);
-      response_code = 0;
-    }
-    else
-    {
-      es = &exchange_sig;
-      ep = &exchange_pub;
-    }
-    break;
-  case MHD_HTTP_BAD_REQUEST:
-    /* This should never happen, either us or the exchange is buggy
-       (or API version conflict); just pass JSON reply to the application */
-    break;
-  case MHD_HTTP_FORBIDDEN:
-    /* Double spending; check signatures on transaction history */
-    if (GNUNET_OK !=
-        verify_deposit_signature_forbidden (dh,
-                                            j))
-    {
-      GNUNET_break_op (0);
-      response_code = 0;
-    }
-    break;
-  case MHD_HTTP_UNAUTHORIZED:
-    /* Nothing really to verify, exchange says one of the signatures is
-       invalid; as we checked them, this should never happen, we
-       should pass the JSON reply to the application */
-    break;
-  case MHD_HTTP_NOT_FOUND:
-    /* Nothing really to verify, this should never
-       happen, we should pass the JSON reply to the application */
-    break;
-  case MHD_HTTP_INTERNAL_SERVER_ERROR:
-    /* Server had an internal issue; we should retry, but this API
-       leaves this to the application */
-    break;
-  default:
-    /* unexpected response code */
-    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-                "Unexpected response code %u\n",
-                (unsigned int) response_code);
-    GNUNET_break (0);
-    response_code = 0;
-    break;
-  }
-  dh->cb (dh->cb_cls,
-          response_code,
-	  TALER_JSON_get_error_code (j),
-	  es,
-          ep,
-          j);
-  TALER_EXCHANGE_deposit_cancel (dh);
-}
-
-
-/**
- * Verify signature information about the deposit.
- *
- * @param dki public key information
- * @param amount the amount to be deposited
- * @param h_wire hash of the merchant’s account details
- * @param h_contract_terms hash of the contact of the merchant with the customer (further details are never disclosed to the exchange)
- * @param coin_pub coin’s public key
- * @param denom_pub denomination key with which the coin is signed
- * @param denom_sig exchange’s unblinded signature of the coin
- * @param timestamp timestamp when the deposit was finalized
- * @param merchant_pub the public key of the merchant (used to identify the merchant for refund requests)
- * @param refund_deadline date until which the merchant can issue a refund to the customer via the exchange (can be zero if refunds are not allowed)
- * @param coin_sig the signature made with purpose #TALER_SIGNATURE_WALLET_COIN_DEPOSIT made by the customer with the coin’s private key.
- * @return #GNUNET_OK if signatures are OK, #GNUNET_SYSERR if not
- */
-static int
-verify_signatures (const struct TALER_EXCHANGE_DenomPublicKey *dki,
-                   const struct TALER_Amount *amount,
-                   const struct GNUNET_HashCode *h_wire,
-                   const struct GNUNET_HashCode *h_contract_terms,
-                   const struct TALER_CoinSpendPublicKeyP *coin_pub,
-                   const struct TALER_DenominationSignature *denom_sig,
-                   const struct TALER_DenominationPublicKey *denom_pub,
-                   struct GNUNET_TIME_Absolute timestamp,
-                   const struct TALER_MerchantPublicKeyP *merchant_pub,
-                   struct GNUNET_TIME_Absolute refund_deadline,
-                   const struct TALER_CoinSpendSignatureP *coin_sig)
-{
-  struct TALER_DepositRequestPS dr;
-  struct TALER_CoinPublicInfo coin_info;
-
-  dr.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_DEPOSIT);
-  dr.purpose.size = htonl (sizeof (struct TALER_DepositRequestPS));
-  dr.h_contract_terms = *h_contract_terms;
-  dr.h_wire = *h_wire;
-  dr.timestamp = GNUNET_TIME_absolute_hton (timestamp);
-  dr.refund_deadline = GNUNET_TIME_absolute_hton (refund_deadline);
-  TALER_amount_hton (&dr.amount_with_fee,
-                     amount);
-  TALER_amount_hton (&dr.deposit_fee,
-                     &dki->fee_deposit);
-  dr.merchant = *merchant_pub;
-  dr.coin_pub = *coin_pub;
-  if (GNUNET_OK !=
-      GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_WALLET_COIN_DEPOSIT,
-                                  &dr.purpose,
-                                  &coin_sig->eddsa_signature,
-                                  &coin_pub->eddsa_pub))
-  {
-    GNUNET_break_op (0);
-    TALER_LOG_WARNING ("Invalid coin signature on /deposit request!\n");
-    {
-      TALER_LOG_DEBUG ("... amount_with_fee was %s\n",
-                       TALER_amount2s (amount));
-      TALER_LOG_DEBUG ("... deposit_fee was %s\n",
-                       TALER_amount2s (&dki->fee_deposit));
-    }
-
-    return GNUNET_SYSERR;
-  }
-
-  /* check coin signature */
-  coin_info.coin_pub = *coin_pub;
-  coin_info.denom_pub = *denom_pub;
-  coin_info.denom_sig = *denom_sig;
-  if (GNUNET_YES !=
-      TALER_test_coin_valid (&coin_info))
-  {
-    GNUNET_break_op (0);
-    TALER_LOG_WARNING ("Invalid coin passed for /deposit\n");
-    return GNUNET_SYSERR;
-  }
-  if (0 < TALER_amount_cmp (&dki->fee_deposit,
-                            amount))
-  {
-    GNUNET_break_op (0);
-    TALER_LOG_WARNING ("Deposit amount smaller than fee\n");
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-/**
- * Submit a deposit permission to the exchange and get the exchange's response.
- * Note that while we return the response verbatim to the caller for
- * further processing, we do already verify that the response is
- * well-formed (i.e. that signatures included in the response are all
- * valid).  If the exchange's reply is not well-formed, we return an
- * HTTP status code of zero to @a cb.
- *
- * We also verify that the @a coin_sig is valid for this deposit
- * request, and that the @a ub_sig is a valid signature for @a
- * coin_pub.  Also, the @a exchange must be ready to operate (i.e.  have
- * finished processing the /keys reply).  If either check fails, we do
- * NOT initiate the transaction with the exchange and instead return NULL.
- *
- * @param exchange the exchange handle; the exchange must be ready to operate
- * @param amount the amount to be deposited
- * @param wire_deadline date until which the merchant would like the exchange to settle the balance (advisory, the exchange cannot be
- *        forced to settle in the past or upon very short notice, but of course a well-behaved exchange will limit aggregation based on the advice received)
- * @param wire_details the merchant’s account details, in a format supported by the exchange
- * @param h_contract_terms hash of the contact of the merchant with the customer (further details are never disclosed to the exchange)
- * @param coin_pub coin’s public key
- * @param denom_pub denomination key with which the coin is signed
- * @param denom_sig exchange’s unblinded signature of the coin
- * @param timestamp timestamp when the contract was finalized, must not be too far in the future
- * @param merchant_pub the public key of the merchant (used to identify the merchant for refund requests)
- * @param refund_deadline date until which the merchant can issue a refund to the customer via the exchange (can be zero if refunds are not allowed); must not be after the @a wire_deadline
- * @param coin_sig the signature made with purpose #TALER_SIGNATURE_WALLET_COIN_DEPOSIT made by the customer with the coin’s private key.
- * @param cb the callback to call when a reply for this request is available
- * @param cb_cls closure for the above callback
- * @return a handle for this request; NULL if the inputs are invalid (i.e.
- *         signatures fail to verify).  In this case, the callback is not called.
- */
-struct TALER_EXCHANGE_DepositHandle *
-TALER_EXCHANGE_deposit (struct TALER_EXCHANGE_Handle *exchange,
-                        const struct TALER_Amount *amount,
-                        struct GNUNET_TIME_Absolute wire_deadline,
-                        json_t *wire_details,
-                        const struct GNUNET_HashCode *h_contract_terms,
-                        const struct TALER_CoinSpendPublicKeyP *coin_pub,
-                        const struct TALER_DenominationSignature *denom_sig,
-                        const struct TALER_DenominationPublicKey *denom_pub,
-                        struct GNUNET_TIME_Absolute timestamp,
-                        const struct TALER_MerchantPublicKeyP *merchant_pub,
-                        struct GNUNET_TIME_Absolute refund_deadline,
-                        const struct TALER_CoinSpendSignatureP *coin_sig,
-                        TALER_EXCHANGE_DepositResultCallback cb,
-                        void *cb_cls)
-{
-  const struct TALER_EXCHANGE_Keys *key_state;
-  const struct TALER_EXCHANGE_DenomPublicKey *dki;
-  struct TALER_EXCHANGE_DepositHandle *dh;
-  struct GNUNET_CURL_Context *ctx;
-  json_t *deposit_obj;
-  CURL *eh;
-  struct GNUNET_HashCode h_wire;
-  struct TALER_Amount amount_without_fee;
-
-  (void) GNUNET_TIME_round_abs (&wire_deadline);
-  (void) GNUNET_TIME_round_abs (&refund_deadline);
-  GNUNET_assert (refund_deadline.abs_value_us <= wire_deadline.abs_value_us);
-  GNUNET_assert (GNUNET_YES ==
-		 TEAH_handle_is_ready (exchange));
-  /* initialize h_wire */
-  if (GNUNET_OK !=
-      TALER_JSON_merchant_wire_signature_hash (wire_details,
-                                               &h_wire))
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-  key_state = TALER_EXCHANGE_get_keys (exchange);
-  dki = TALER_EXCHANGE_get_denomination_key (key_state,
-                                             denom_pub);
-  GNUNET_assert (NULL != dki);
-  GNUNET_assert (GNUNET_SYSERR !=
-		 TALER_amount_subtract (&amount_without_fee,
-					amount,
-					&dki->fee_deposit));
-  if (GNUNET_OK !=
-      verify_signatures (dki,
-                         amount,
-                         &h_wire,
-                         h_contract_terms,
-                         coin_pub,
-                         denom_sig,
-                         denom_pub,
-                         timestamp,
-                         merchant_pub,
-                         refund_deadline,
-                         coin_sig))
-  {
-    GNUNET_break_op (0);
-    return NULL;
-  }
-
-  deposit_obj = json_pack ("{s:o, s:O," /* f/wire */
-                           " s:o, s:o," /* H_wire, h_contract_terms */
-                           " s:o, s:o," /* coin_pub, denom_pub */
-                           " s:o, s:o," /* ub_sig, timestamp */
-                           " s:o," /* merchant_pub */
-                           " s:o, s:o," /* refund_deadline, wire_deadline */
-                           " s:o}",     /* coin_sig */
-                           "contribution", TALER_JSON_from_amount (amount),
-                           "wire", wire_details,
-                           "H_wire", GNUNET_JSON_from_data_auto (&h_wire),
-                           "h_contract_terms", GNUNET_JSON_from_data_auto (h_contract_terms),
-                           "coin_pub", GNUNET_JSON_from_data_auto (coin_pub),
-                           "denom_pub", GNUNET_JSON_from_rsa_public_key (denom_pub->rsa_public_key),
-                           "ub_sig", GNUNET_JSON_from_rsa_signature (denom_sig->rsa_signature),
-                           "timestamp", GNUNET_JSON_from_time_abs (timestamp),
-                           "merchant_pub", GNUNET_JSON_from_data_auto (merchant_pub),
-                           "refund_deadline", GNUNET_JSON_from_time_abs (refund_deadline),
-                           "wire_transfer_deadline", GNUNET_JSON_from_time_abs (wire_deadline),
-                           "coin_sig", GNUNET_JSON_from_data_auto (coin_sig)
-                           );
-  if (NULL == deposit_obj)
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-
-  dh = GNUNET_new (struct TALER_EXCHANGE_DepositHandle);
-  dh->exchange = exchange;
-  dh->cb = cb;
-  dh->cb_cls = cb_cls;
-  dh->url = TEAH_path_to_url (exchange, "/deposit");
-  dh->depconf.purpose.size = htonl (sizeof (struct TALER_DepositConfirmationPS));
-  dh->depconf.purpose.purpose = htonl (TALER_SIGNATURE_EXCHANGE_CONFIRM_DEPOSIT);
-  dh->depconf.h_contract_terms = *h_contract_terms;
-  dh->depconf.h_wire = h_wire;
-  dh->depconf.timestamp = GNUNET_TIME_absolute_hton (timestamp);
-  dh->depconf.refund_deadline = GNUNET_TIME_absolute_hton (refund_deadline);
-  TALER_amount_hton (&dh->depconf.amount_without_fee,
-                     &amount_without_fee);
-  dh->depconf.coin_pub = *coin_pub;
-  dh->depconf.merchant = *merchant_pub;
-  dh->amount_with_fee = *amount;
-  dh->coin_value = dki->value;
-
-  eh = TEL_curl_easy_get (dh->url);
-  GNUNET_assert (NULL != (dh->json_enc =
-                          json_dumps (deposit_obj,
-                                      JSON_COMPACT)));
-  json_decref (deposit_obj);
-  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
-              "URL for deposit: `%s'\n",
-              dh->url);
-  GNUNET_assert (CURLE_OK ==
-                 curl_easy_setopt (eh,
-                                   CURLOPT_POSTFIELDS,
-                                   dh->json_enc));
-  GNUNET_assert (CURLE_OK ==
-                 curl_easy_setopt (eh,
-                                   CURLOPT_POSTFIELDSIZE,
-                                   strlen (dh->json_enc)));
-  ctx = TEAH_handle_to_context (exchange);
-  dh->job = GNUNET_CURL_job_add (ctx,
-				 eh,
-				 GNUNET_YES,
-				 &handle_deposit_finished,
-				 dh);
-  return dh;
-}
-
-
-/**
- * Cancel a deposit permission request.  This function cannot be used
- * on a request handle if a response is already served for it.
- *
- * @param deposit the deposit permission request handle
- */
-void
-TALER_EXCHANGE_deposit_cancel (struct TALER_EXCHANGE_DepositHandle *deposit)
-{
-  if (NULL != deposit->job)
-  {
-    GNUNET_CURL_job_cancel (deposit->job);
-    deposit->job = NULL;
-  }
-  GNUNET_free (deposit->url);
-  GNUNET_free (deposit->json_enc);
-  GNUNET_free (deposit);
-}
-
-
-/* end of exchange_api_deposit.c */