renaming mint->exchange

1 files changed, 0 insertions, 569 deletions

diff --git a/src/mint-lib/mint_api_deposit.c b/src/mint-lib/mint_api_deposit.c
deleted file mode 100644
index 400372925..000000000
--- a/src/mint-lib/mint_api_deposit.c
+++ /dev/null
@@ -1,569 +0,0 @@
-/*
-  This file is part of TALER
-  Copyright (C) 2014, 2015 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, If not, see
-  <http://www.gnu.org/licenses/>
-*/
-/**
- * @file mint-lib/mint_api_deposit.c
- * @brief Implementation of the /deposit request of the mint's HTTP API
- * @author Sree Harsha Totakura <sreeharsha@totakura.in>
- * @author Christian Grothoff
- */
-#include "platform.h"
-#include <curl/curl.h>
-#include <jansson.h>
-#include <microhttpd.h> /* just for HTTP status codes */
-#include <gnunet/gnunet_util_lib.h>
-#include "taler_mint_service.h"
-#include "mint_api_common.h"
-#include "mint_api_json.h"
-#include "mint_api_context.h"
-#include "mint_api_handle.h"
-#include "taler_signatures.h"
-
-
-/**
- * @brief A Deposit Handle
- */
-struct TALER_MINT_DepositHandle
-{
-
-  /**
-   * The connection to mint this request handle will use
-   */
-  struct TALER_MINT_Handle *mint;
-
-  /**
-   * The url for this request.
-   */
-  char *url;
-
-  /**
-   * JSON encoding of the request to POST.
-   */
-  char *json_enc;
-
-  /**
-   * Handle for the request.
-   */
-  struct MAC_Job *job;
-
-  /**
-   * Function to call with the result.
-   */
-  TALER_MINT_DepositResultCallback cb;
-
-  /**
-   * Closure for @a cb.
-   */
-  void *cb_cls;
-
-  /**
-   * Download buffer
-   */
-  struct MAC_DownloadBuffer db;
-
-  /**
-   * Information the mint 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;
-
-};
-
-
-/**
- * Verify that the signature on the "200 OK" response
- * from the mint is valid.
- *
- * @param dh deposit handle
- * @param json json reply with the signature
- * @return #GNUNET_OK if the signature is valid, #GNUNET_SYSERR if not
- */
-static int
-verify_deposit_signature_ok (const struct TALER_MINT_DepositHandle *dh,
-                             json_t *json)
-{
-  struct TALER_MintSignatureP mint_sig;
-  struct TALER_MintPublicKeyP mint_pub;
-  const struct TALER_MINT_Keys *key_state;
-  struct MAJ_Specification spec[] = {
-    MAJ_spec_fixed_auto ("sig", &mint_sig),
-    MAJ_spec_fixed_auto ("pub", &mint_pub),
-    MAJ_spec_end
-  };
-
-  if (GNUNET_OK !=
-      MAJ_parse_json (json,
-                      spec))
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  key_state = TALER_MINT_get_keys (dh->mint);
-  if (GNUNET_OK !=
-      TALER_MINT_test_signing_key (key_state,
-                                   &mint_pub))
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  if (GNUNET_OK !=
-      GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MINT_CONFIRM_DEPOSIT,
-                                  &dh->depconf.purpose,
-                                  &mint_sig.eddsa_signature,
-                                  &mint_pub.eddsa_pub))
-  {
-    GNUNET_break_op (0);
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-/**
- * Verify that the signatures on the "403 FORBIDDEN" response from the
- * mint 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_MINT_DepositHandle *dh,
-                                    json_t *json)
-{
-  json_t *history;
-  struct TALER_Amount total;
-
-  history = json_object_get (json,
-                             "history");
-  if (GNUNET_OK !=
-      TALER_MINT_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_MINT_DepositHandle`
- * @param eh the curl request handle
- */
-static void
-handle_deposit_finished (void *cls,
-                         CURL *eh)
-{
-  struct TALER_MINT_DepositHandle *dh = cls;
-  long response_code;
-  json_t *json;
-
-  dh->job = NULL;
-  json = MAC_download_get_result (&dh->db,
-                                  eh,
-                                  &response_code);
-  switch (response_code)
-  {
-  case 0:
-    break;
-  case MHD_HTTP_OK:
-    if (GNUNET_OK !=
-        verify_deposit_signature_ok (dh,
-                                     json))
-    {
-      GNUNET_break_op (0);
-      response_code = 0;
-    }
-    break;
-  case MHD_HTTP_BAD_REQUEST:
-    /* This should never happen, either us or the mint 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,
-                                            json))
-    {
-      GNUNET_break_op (0);
-      response_code = 0;
-    }
-    break;
-  case MHD_HTTP_UNAUTHORIZED:
-    /* Nothing really to verify, mint 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",
-                response_code);
-    GNUNET_break (0);
-    response_code = 0;
-    break;
-  }
-  dh->cb (dh->cb_cls,
-          response_code,
-          json);
-  json_decref (json);
-  TALER_MINT_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 hash of the contact of the merchant with the customer (further details are never disclosed to the mint)
- * @param coin_pub coin’s public key
- * @param denom_pub denomination key with which the coin is signed
- * @param denom_sig mint’s unblinded signature of the coin
- * @param timestamp timestamp when the contract was finalized, must match approximately the current time of the mint
- * @param transaction_id transaction id for the transaction between merchant and customer
- * @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 mint (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_MINT_DenomPublicKey *dki,
-                   const struct TALER_Amount *amount,
-                   const struct GNUNET_HashCode *h_wire,
-                   const struct GNUNET_HashCode *h_contract,
-                   const struct TALER_CoinSpendPublicKeyP *coin_pub,
-                   const struct TALER_DenominationSignature *denom_sig,
-                   const struct TALER_DenominationPublicKey *denom_pub,
-                   struct GNUNET_TIME_Absolute timestamp,
-                   uint64_t transaction_id,
-                   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 = *h_contract;
-  dr.h_wire = *h_wire;
-  dr.timestamp = GNUNET_TIME_absolute_hton (timestamp);
-  dr.refund_deadline = GNUNET_TIME_absolute_hton (refund_deadline);
-  dr.transaction_id = GNUNET_htonll (transaction_id);
-  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))
-  {
-    TALER_LOG_WARNING ("Invalid coin signature on /deposit request\n");
-    {
-      char *s;
-      s = TALER_amount_to_string (amount);
-      TALER_LOG_DEBUG ("... amount_with_fee was %s\n", s);
-      GNUNET_free (s);
-      s = TALER_amount_to_string (&dki->fee_deposit);
-      TALER_LOG_DEBUG ("... deposit_fee was %s\n", s);
-      GNUNET_free (s);
-    }
-
-    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))
-  {
-    TALER_LOG_WARNING ("Invalid coin passed for /deposit\n");
-    return GNUNET_SYSERR;
-  }
-  if (0 < TALER_amount_cmp (&dki->fee_deposit,
-                            amount))
-  {
-    TALER_LOG_WARNING ("Deposit amount smaller than fee\n");
-    return GNUNET_SYSERR;
-  }
-  return GNUNET_OK;
-}
-
-
-/**
- * Submit a deposit permission to the mint and get the mint'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 mint'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 mint 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 mint and instead return NULL.
- *
- * @param mint the mint handle; the mint must be ready to operate
- * @param amount the amount to be deposited
- * @param wire_deadline date until which the merchant would like the mint to settle the balance (advisory, the mint cannot be
- *        forced to settle in the past or upon very short notice, but of course a well-behaved mint will limit aggregation based on the advice received)
- * @param wire_details the merchant’s account details, in a format supported by the mint
- * @param h_contract hash of the contact of the merchant with the customer (further details are never disclosed to the mint)
- * @param coin_pub coin’s public key
- * @param denom_pub denomination key with which the coin is signed
- * @param denom_sig mint’s unblinded signature of the coin
- * @param timestamp timestamp when the contract was finalized, must match approximately the current time of the mint
- * @param transaction_id transaction id for the transaction between merchant and customer
- * @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 mint (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.
- * @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_MINT_DepositHandle *
-TALER_MINT_deposit (struct TALER_MINT_Handle *mint,
-                    const struct TALER_Amount *amount,
-                    struct GNUNET_TIME_Absolute wire_deadline,
-                    json_t *wire_details,
-                    const struct GNUNET_HashCode *h_contract,
-                    const struct TALER_CoinSpendPublicKeyP *coin_pub,
-                    const struct TALER_DenominationSignature *denom_sig,
-                    const struct TALER_DenominationPublicKey *denom_pub,
-                    struct GNUNET_TIME_Absolute timestamp,
-                    uint64_t transaction_id,
-                    const struct TALER_MerchantPublicKeyP *merchant_pub,
-                    struct GNUNET_TIME_Absolute refund_deadline,
-                    const struct TALER_CoinSpendSignatureP *coin_sig,
-                    TALER_MINT_DepositResultCallback cb,
-                    void *cb_cls)
-{
-  const struct TALER_MINT_Keys *key_state;
-  const struct TALER_MINT_DenomPublicKey *dki;
-  struct TALER_MINT_DepositHandle *dh;
-  struct TALER_MINT_Context *ctx;
-  json_t *deposit_obj;
-  CURL *eh;
-  struct GNUNET_HashCode h_wire;
-  struct TALER_Amount amount_without_fee;
-
-  (void) TALER_round_abs_time (&wire_deadline);
-  if (GNUNET_YES !=
-      MAH_handle_is_ready (mint))
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-  /* initialize h_wire */
-  if (GNUNET_OK !=
-      TALER_hash_json (wire_details,
-                       &h_wire))
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-  key_state = TALER_MINT_get_keys (mint);
-  dki = TALER_MINT_get_denomination_key (key_state,
-                                         denom_pub);
-  if (NULL == dki)
-  {
-    TALER_LOG_WARNING ("Denomination key unknown to mint\n");
-    return NULL;
-  }
-  if (GNUNET_SYSERR ==
-      TALER_amount_subtract (&amount_without_fee,
-                             amount,
-                             &dki->fee_deposit))
-  {
-    GNUNET_break (0);
-    return NULL;
-  }
-
-  if (GNUNET_OK !=
-      verify_signatures (dki,
-                         amount,
-                         &h_wire,
-                         h_contract,
-                         coin_pub,
-                         denom_sig,
-                         denom_pub,
-                         timestamp,
-                         transaction_id,
-                         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 */
-                           " s:o, s:o," /* coin_pub, denom_pub */
-                           " s:o, s:o," /* ub_sig, timestamp */
-                           " s:I, s:o," /* transaction id, merchant_pub */
-                           " s:o, s:o," /* refund_deadline, wire_deadline */
-                           " s:o}",     /* coin_sig */
-                           "f", TALER_json_from_amount (amount),
-                           "wire", wire_details,
-                           "H_wire", TALER_json_from_data (&h_wire,
-                                                           sizeof (h_wire)),
-                           "H_contract", TALER_json_from_data (h_contract,
-                                                               sizeof (struct GNUNET_HashCode)),
-                           "coin_pub", TALER_json_from_data (coin_pub,
-                                                             sizeof (*coin_pub)),
-                           "denom_pub", TALER_json_from_rsa_public_key (denom_pub->rsa_public_key),
-                           "ub_sig", TALER_json_from_rsa_signature (denom_sig->rsa_signature),
-                           "timestamp", TALER_json_from_abs (timestamp),
-                           "transaction_id", (json_int_t) transaction_id,
-                           "merchant_pub", TALER_json_from_data (merchant_pub,
-                                                                 sizeof (*merchant_pub)),
-                           "refund_deadline", TALER_json_from_abs (refund_deadline),
-                           "edate", TALER_json_from_abs (wire_deadline),
-                           "coin_sig", TALER_json_from_data (coin_sig,
-                                                             sizeof (*coin_sig))
-                           );
-
-  dh = GNUNET_new (struct TALER_MINT_DepositHandle);
-  dh->mint = mint;
-  dh->cb = cb;
-  dh->cb_cls = cb_cls;
-  dh->url = MAH_path_to_url (mint, "/deposit");
-  dh->depconf.purpose.size = htonl (sizeof (struct TALER_DepositConfirmationPS));
-  dh->depconf.purpose.purpose = htonl (TALER_SIGNATURE_MINT_CONFIRM_DEPOSIT);
-  dh->depconf.h_contract = *h_contract;
-  dh->depconf.h_wire = h_wire;
-  dh->depconf.transaction_id = GNUNET_htonll (transaction_id);
-  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 = curl_easy_init ();
-  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_URL,
-                                   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)));
-  GNUNET_assert (CURLE_OK ==
-                 curl_easy_setopt (eh,
-                                   CURLOPT_WRITEFUNCTION,
-                                   &MAC_download_cb));
-  GNUNET_assert (CURLE_OK ==
-                 curl_easy_setopt (eh,
-                                   CURLOPT_WRITEDATA,
-                                   &dh->db));
-  ctx = MAH_handle_to_context (mint);
-  dh->job = MAC_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_MINT_deposit_cancel (struct TALER_MINT_DepositHandle *deposit)
-{
-  if (NULL != deposit->job)
-  {
-    MAC_job_cancel (deposit->job);
-    deposit->job = NULL;
-  }
-  GNUNET_free_non_null (deposit->db.buf);
-  GNUNET_free (deposit->url);
-  GNUNET_free (deposit->json_enc);
-  GNUNET_free (deposit);
-}
-
-
-/* end of mint_api_deposit.c */