diff options
Diffstat (limited to 'src/lib/exchange_api_deposit.c')
| -rw-r--r-- | src/lib/exchange_api_deposit.c | 557 |
1 files changed, 0 insertions, 557 deletions
diff --git a/src/lib/exchange_api_deposit.c b/src/lib/exchange_api_deposit.c deleted file mode 100644 index 3ba986b2d..000000000 --- a/src/lib/exchange_api_deposit.c +++ /dev/null @@ -1,557 +0,0 @@ -/* - This file is part of TALER - Copyright (C) 2014-2021 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 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_common.h" -#include "exchange_api_handle.h" -#include "taler_signatures.h" -#include "exchange_api_curl_defaults.h" - - -/** - * 1:#AUDITOR_CHANCE is the probability that we report deposits - * to the auditor. - * - * 20==5% of going to auditor. This is possibly still too high, but set - * deliberately this high for testing - */ -#define AUDITOR_CHANCE 20 - -/** - * @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; - - /** - * Context for #TEH_curl_easy_post(). Keeps the data that must - * persist for Curl to make the upload. - */ - struct TALER_CURL_PostContext ctx; - - /** - * 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; - - /** - * Details about the contract. - */ - struct TALER_EXCHANGE_DepositContractDetail dcd; - - /** - * Details about the coin. - */ - struct TALER_EXCHANGE_CoinDepositDetail cdd; - - /** - * Hash of the merchant's wire details. - */ - struct TALER_MerchantWireHashP h_wire; - - /** - * Hash over the extensions, or all zero. - */ - struct TALER_ExtensionContractHashP h_extensions; - - /** - * Time when this confirmation was generated / when the exchange received - * the deposit request. - */ - struct GNUNET_TIME_Timestamp exchange_timestamp; - - /** - * Exchange signature, set for #auditor_cb. - */ - struct TALER_ExchangeSignatureP exchange_sig; - - /** - * Exchange signing public key, set for #auditor_cb. - */ - struct TALER_ExchangePublicKeyP exchange_pub; - - /** - * Chance that we will inform the auditor about the deposit - * is 1:n, where the value of this field is "n". - */ - unsigned int auditor_chance; - -}; - - -/** - * Function called for each auditor to give us a chance to possibly - * launch a deposit confirmation interaction. - * - * @param cls closure - * @param ah handle to the auditor - * @param auditor_pub public key of the auditor - * @return NULL if no deposit confirmation interaction was launched - */ -static struct TEAH_AuditorInteractionEntry * -auditor_cb (void *cls, - struct TALER_AUDITOR_Handle *ah, - const struct TALER_AuditorPublicKeyP *auditor_pub) -{ - struct TALER_EXCHANGE_DepositHandle *dh = cls; - const struct TALER_EXCHANGE_Keys *key_state; - const struct TALER_EXCHANGE_SigningPublicKey *spk; - struct TEAH_AuditorInteractionEntry *aie; - struct TALER_Amount amount_without_fee; - const struct TALER_EXCHANGE_DenomPublicKey *dki; - - if (0 != - GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, - dh->auditor_chance)) - { - GNUNET_log (GNUNET_ERROR_TYPE_INFO, - "Not providing deposit confirmation to auditor\n"); - return NULL; - } - GNUNET_log (GNUNET_ERROR_TYPE_INFO, - "Will provide deposit confirmation to auditor `%s'\n", - TALER_B2S (auditor_pub)); - key_state = TALER_EXCHANGE_get_keys (dh->exchange); - dki = TALER_EXCHANGE_get_denomination_key_by_hash (key_state, - &dh->cdd.h_denom_pub); - GNUNET_assert (NULL != dki); - spk = TALER_EXCHANGE_get_signing_key_info (key_state, - &dh->exchange_pub); - if (NULL == spk) - { - GNUNET_break_op (0); - return NULL; - } - GNUNET_assert (0 <= - TALER_amount_subtract (&amount_without_fee, - &dh->cdd.amount, - &dki->fees.deposit)); - aie = GNUNET_new (struct TEAH_AuditorInteractionEntry); - aie->dch = TALER_AUDITOR_deposit_confirmation ( - ah, - &dh->h_wire, - &dh->h_extensions, - &dh->dcd.h_contract_terms, - dh->exchange_timestamp, - dh->dcd.wire_deadline, - dh->dcd.refund_deadline, - &amount_without_fee, - &dh->cdd.coin_pub, - &dh->dcd.merchant_pub, - &dh->exchange_pub, - &dh->exchange_sig, - &key_state->master_pub, - spk->valid_from, - spk->valid_until, - spk->valid_legal, - &spk->master_sig, - &TEAH_acc_confirmation_cb, - aie); - return aie; -} - - -/** - * 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; - const json_t *j = response; - struct TALER_EXCHANGE_DepositResult dr = { - .hr.reply = j, - .hr.http_status = (unsigned int) response_code - }; - const struct TALER_EXCHANGE_Keys *keys; - - dh->job = NULL; - keys = TALER_EXCHANGE_get_keys (dh->exchange); - switch (response_code) - { - case 0: - dr.hr.ec = TALER_EC_GENERIC_INVALID_RESPONSE; - break; - case MHD_HTTP_OK: - { - const struct TALER_EXCHANGE_Keys *key_state; - struct GNUNET_JSON_Specification spec[] = { - GNUNET_JSON_spec_fixed_auto ("exchange_sig", - &dh->exchange_sig), - GNUNET_JSON_spec_fixed_auto ("exchange_pub", - &dh->exchange_pub), - GNUNET_JSON_spec_mark_optional ( - GNUNET_JSON_spec_string ("transaction_base_url", - &dr.details.success.transaction_base_url), - NULL), - GNUNET_JSON_spec_timestamp ("exchange_timestamp", - &dh->exchange_timestamp), - GNUNET_JSON_spec_end () - }; - struct TALER_Amount amount_without_fee; - const struct TALER_EXCHANGE_DenomPublicKey *dki; - - if (GNUNET_OK != - GNUNET_JSON_parse (j, - spec, - NULL, NULL)) - { - GNUNET_break_op (0); - dr.hr.http_status = 0; - dr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED; - break; - } - key_state = TALER_EXCHANGE_get_keys (dh->exchange); - dki = TALER_EXCHANGE_get_denomination_key_by_hash (key_state, - &dh->cdd.h_denom_pub); - GNUNET_assert (NULL != dki); - if (GNUNET_OK != - TALER_EXCHANGE_test_signing_key (key_state, - &dh->exchange_pub)) - { - GNUNET_break_op (0); - dr.hr.http_status = 0; - dr.hr.ec = TALER_EC_EXCHANGE_DEPOSIT_INVALID_SIGNATURE_BY_EXCHANGE; - break; - } - GNUNET_assert (0 <= - TALER_amount_subtract (&amount_without_fee, - &dh->cdd.amount, - &dki->fees.deposit)); - - if (GNUNET_OK != - TALER_exchange_online_deposit_confirmation_verify ( - &dh->dcd.h_contract_terms, - &dh->h_wire, - &dh->h_extensions, - dh->exchange_timestamp, - dh->dcd.wire_deadline, - dh->dcd.refund_deadline, - &amount_without_fee, - &dh->cdd.coin_pub, - &dh->dcd.merchant_pub, - &dh->exchange_pub, - &dh->exchange_sig)) - { - GNUNET_break_op (0); - dr.hr.http_status = 0; - dr.hr.ec = TALER_EC_EXCHANGE_DEPOSIT_INVALID_SIGNATURE_BY_EXCHANGE; - break; - } - - TEAH_get_auditors_for_dc (dh->exchange, - &auditor_cb, - dh); - } - dr.details.success.exchange_sig = &dh->exchange_sig; - dr.details.success.exchange_pub = &dh->exchange_pub; - dr.details.success.deposit_timestamp = dh->exchange_timestamp; - 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 */ - dr.hr.ec = TALER_JSON_get_error_code (j); - dr.hr.hint = TALER_JSON_get_error_hint (j); - break; - case MHD_HTTP_FORBIDDEN: - dr.hr.ec = TALER_JSON_get_error_code (j); - dr.hr.hint = TALER_JSON_get_error_hint (j); - /* 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: - dr.hr.ec = TALER_JSON_get_error_code (j); - dr.hr.hint = TALER_JSON_get_error_hint (j); - /* Nothing really to verify, this should never - happen, we should pass the JSON reply to the application */ - break; - case MHD_HTTP_CONFLICT: - { - const struct TALER_EXCHANGE_Keys *key_state; - const struct TALER_EXCHANGE_DenomPublicKey *dki; - - key_state = TALER_EXCHANGE_get_keys (dh->exchange); - dki = TALER_EXCHANGE_get_denomination_key_by_hash (key_state, - &dh->cdd.h_denom_pub); - GNUNET_assert (NULL != dki); - dr.hr.ec = TALER_JSON_get_error_code (j); - dr.hr.hint = TALER_JSON_get_error_hint (j); - if (GNUNET_OK != - TALER_EXCHANGE_check_coin_conflict_ ( - keys, - j, - dki, - &dh->cdd.coin_pub, - &dh->cdd.coin_sig, - &dh->cdd.amount)) - { - GNUNET_break_op (0); - dr.hr.http_status = 0; - dr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED; - break; - } - } - break; - case MHD_HTTP_GONE: - /* could happen if denomination was revoked */ - /* Note: one might want to check /keys for revocation - signature here, alas tricky in case our /keys - is outdated => left to clients */ - dr.hr.ec = TALER_JSON_get_error_code (j); - dr.hr.hint = TALER_JSON_get_error_hint (j); - break; - case MHD_HTTP_INTERNAL_SERVER_ERROR: - dr.hr.ec = TALER_JSON_get_error_code (j); - dr.hr.hint = TALER_JSON_get_error_hint (j); - /* Server had an internal issue; we should retry, but this API - leaves this to the application */ - break; - default: - /* unexpected response code */ - dr.hr.ec = TALER_JSON_get_error_code (j); - dr.hr.hint = TALER_JSON_get_error_hint (j); - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - "Unexpected response code %u/%d for exchange deposit\n", - (unsigned int) response_code, - dr.hr.ec); - GNUNET_break_op (0); - break; - } - dh->cb (dh->cb_cls, - &dr); - TALER_EXCHANGE_deposit_cancel (dh); -} - - -struct TALER_EXCHANGE_DepositHandle * -TALER_EXCHANGE_deposit ( - struct TALER_EXCHANGE_Handle *exchange, - const struct TALER_EXCHANGE_DepositContractDetail *dcd, - const struct TALER_EXCHANGE_CoinDepositDetail *cdd, - TALER_EXCHANGE_DepositResultCallback cb, - void *cb_cls, - enum TALER_ErrorCode *ec) -{ - const struct TALER_EXCHANGE_Keys *key_state; - struct TALER_EXCHANGE_DepositHandle *dh; - struct GNUNET_CURL_Context *ctx; - json_t *deposit_obj; - CURL *eh; - const struct TALER_EXCHANGE_DenomPublicKey *dki; - struct TALER_Amount amount_without_fee; - char arg_str[sizeof (struct TALER_CoinSpendPublicKeyP) * 2 + 32]; - - GNUNET_assert (GNUNET_YES == - TEAH_handle_is_ready (exchange)); - if (GNUNET_TIME_timestamp_cmp (dcd->refund_deadline, - >, - dcd->wire_deadline)) - { - GNUNET_break_op (0); - *ec = TALER_EC_EXCHANGE_DEPOSIT_REFUND_DEADLINE_AFTER_WIRE_DEADLINE; - return NULL; - } - { - char pub_str[sizeof (struct TALER_CoinSpendPublicKeyP) * 2]; - char *end; - - end = GNUNET_STRINGS_data_to_string ( - &cdd->coin_pub, - sizeof (struct TALER_CoinSpendPublicKeyP), - pub_str, - sizeof (pub_str)); - *end = '\0'; - GNUNET_snprintf (arg_str, - sizeof (arg_str), - "/coins/%s/deposit", - pub_str); - } - key_state = TALER_EXCHANGE_get_keys (exchange); - dki = TALER_EXCHANGE_get_denomination_key_by_hash (key_state, - &cdd->h_denom_pub); - if (NULL == dki) - { - *ec = TALER_EC_EXCHANGE_GENERIC_DENOMINATION_KEY_UNKNOWN; - GNUNET_break_op (0); - return NULL; - } - if (0 > - TALER_amount_subtract (&amount_without_fee, - &cdd->amount, - &dki->fees.deposit)) - { - *ec = TALER_EC_EXCHANGE_DEPOSIT_FEE_ABOVE_AMOUNT; - GNUNET_break_op (0); - return NULL; - } - dh = GNUNET_new (struct TALER_EXCHANGE_DepositHandle); - dh->auditor_chance = AUDITOR_CHANCE; - dh->exchange = exchange; - dh->cb = cb; - dh->cb_cls = cb_cls; - dh->cdd = *cdd; - dh->dcd = *dcd; - if (NULL != dcd->extension_details) - TALER_deposit_extension_hash (dcd->extension_details, - &dh->h_extensions); - TALER_merchant_wire_signature_hash (dcd->merchant_payto_uri, - &dcd->wire_salt, - &dh->h_wire); - if (GNUNET_OK != - TALER_EXCHANGE_verify_deposit_signature_ (dcd, - &dh->h_extensions, - &dh->h_wire, - cdd, - dki)) - { - *ec = TALER_EC_EXCHANGE_DEPOSIT_COIN_SIGNATURE_INVALID; - GNUNET_break_op (0); - GNUNET_free (dh); - return NULL; - } - dh->url = TEAH_path_to_url (exchange, - arg_str); - if (NULL == dh->url) - { - GNUNET_break (0); - *ec = TALER_EC_GENERIC_ALLOCATION_FAILURE; - GNUNET_free (dh->url); - GNUNET_free (dh); - return NULL; - } - - deposit_obj = GNUNET_JSON_PACK ( - TALER_JSON_pack_amount ("contribution", - &cdd->amount), - GNUNET_JSON_pack_string ("merchant_payto_uri", - dcd->merchant_payto_uri), - GNUNET_JSON_pack_data_auto ("wire_salt", - &dcd->wire_salt), - GNUNET_JSON_pack_data_auto ("h_contract_terms", - &dcd->h_contract_terms), - GNUNET_JSON_pack_allow_null ( - GNUNET_JSON_pack_data_auto ("h_age_commitment", - &cdd->h_age_commitment)), - GNUNET_JSON_pack_data_auto ("denom_pub_hash", - &cdd->h_denom_pub), - TALER_JSON_pack_denom_sig ("ub_sig", - &cdd->denom_sig), - GNUNET_JSON_pack_timestamp ("timestamp", - dcd->timestamp), - GNUNET_JSON_pack_data_auto ("merchant_pub", - &dcd->merchant_pub), - GNUNET_JSON_pack_allow_null ( - GNUNET_JSON_pack_timestamp ("refund_deadline", - dcd->refund_deadline)), - GNUNET_JSON_pack_timestamp ("wire_transfer_deadline", - dcd->wire_deadline), - GNUNET_JSON_pack_data_auto ("coin_sig", - &cdd->coin_sig)); - GNUNET_assert (NULL != deposit_obj); - eh = TALER_EXCHANGE_curl_easy_get_ (dh->url); - if ( (NULL == eh) || - (GNUNET_OK != - TALER_curl_easy_post (&dh->ctx, - eh, - deposit_obj)) ) - { - *ec = TALER_EC_GENERIC_CURL_ALLOCATION_FAILURE; - GNUNET_break (0); - if (NULL != eh) - curl_easy_cleanup (eh); - json_decref (deposit_obj); - GNUNET_free (dh->url); - GNUNET_free (dh); - return NULL; - } - json_decref (deposit_obj); - GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, - "URL for deposit: `%s'\n", - dh->url); - ctx = TEAH_handle_to_context (exchange); - dh->job = GNUNET_CURL_job_add2 (ctx, - eh, - dh->ctx.headers, - &handle_deposit_finished, - dh); - return dh; -} - - -void -TALER_EXCHANGE_deposit_force_dc (struct TALER_EXCHANGE_DepositHandle *deposit) -{ - deposit->auditor_chance = 1; -} - - -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); - TALER_curl_easy_post_finished (&deposit->ctx); - GNUNET_free (deposit); -} - - -/* end of exchange_api_deposit.c */ |