diff options
Diffstat (limited to 'src/lib/exchange_api_withdraw.c')
| -rw-r--r-- | src/lib/exchange_api_withdraw.c | 342 |
1 files changed, 0 insertions, 342 deletions
diff --git a/src/lib/exchange_api_withdraw.c b/src/lib/exchange_api_withdraw.c deleted file mode 100644 index b8ab1df44..000000000 --- a/src/lib/exchange_api_withdraw.c +++ /dev/null @@ -1,342 +0,0 @@ -/* - This file is part of TALER - Copyright (C) 2014-2022 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_withdraw.c - * @brief Implementation of /reserves/$RESERVE_PUB/withdraw requests with blinding/unblinding - * @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_exchange_service.h" -#include "taler_json_lib.h" -#include "exchange_api_handle.h" -#include "taler_signatures.h" -#include "exchange_api_curl_defaults.h" - - -/** - * @brief A Withdraw Handle - */ -struct TALER_EXCHANGE_WithdrawHandle -{ - - /** - * The connection to exchange this request handle will use - */ - struct TALER_EXCHANGE_Handle *exchange; - - /** - * Handle for the actual (internal) withdraw operation. - */ - struct TALER_EXCHANGE_Withdraw2Handle *wh2; - - /** - * Function to call with the result. - */ - TALER_EXCHANGE_WithdrawCallback cb; - - /** - * Closure for @a cb. - */ - void *cb_cls; - - /** - * Reserve private key. - */ - const struct TALER_ReservePrivateKeyP *reserve_priv; - - /** - * Seed of the planchet. - */ - struct TALER_PlanchetMasterSecretP ps; - - /** - * blinding secret - */ - union TALER_DenominationBlindingKeyP bks; - - /** - * Private key of the coin we are withdrawing. - */ - struct TALER_CoinSpendPrivateKeyP priv; - - /** - * Details of the planchet. - */ - struct TALER_PlanchetDetail pd; - - /** - * Values of the @cipher selected - */ - struct TALER_ExchangeWithdrawValues alg_values; - - /** - * Hash of the age commitment for this coin, if applicable. Maybe NULL - */ - const struct TALER_AgeCommitmentHash *ach; - - /** - * Denomination key we are withdrawing. - */ - struct TALER_EXCHANGE_DenomPublicKey pk; - - /** - * Hash of the public key of the coin we are signing. - */ - struct TALER_CoinPubHashP c_hash; - - /** - * Handler for the CS R request (only used for TALER_DENOMINATION_CS denominations) - */ - struct TALER_EXCHANGE_CsRWithdrawHandle *csrh; - -}; - - -/** - * Function called when we're done processing the - * HTTP /reserves/$RESERVE_PUB/withdraw request. - * - * @param cls the `struct TALER_EXCHANGE_WithdrawHandle` - * @param hr HTTP response data - * @param blind_sig blind signature over the coin, NULL on error - */ -static void -handle_reserve_withdraw_finished ( - void *cls, - const struct TALER_EXCHANGE_HttpResponse *hr, - const struct TALER_BlindedDenominationSignature *blind_sig) -{ - struct TALER_EXCHANGE_WithdrawHandle *wh = cls; - struct TALER_EXCHANGE_WithdrawResponse wr = { - .hr = *hr - }; - - wh->wh2 = NULL; - switch (hr->http_status) - { - case MHD_HTTP_OK: - { - struct TALER_FreshCoin fc; - - if (GNUNET_OK != - TALER_planchet_to_coin (&wh->pk.key, - blind_sig, - &wh->bks, - &wh->priv, - wh->ach, - &wh->c_hash, - &wh->alg_values, - &fc)) - { - wr.hr.http_status = 0; - wr.hr.ec = TALER_EC_EXCHANGE_WITHDRAW_UNBLIND_FAILURE; - break; - } - wr.details.success.coin_priv = wh->priv; - wr.details.success.bks = wh->bks; - wr.details.success.sig = fc.sig; - wr.details.success.exchange_vals = wh->alg_values; - break; - } - case MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS: - { - struct GNUNET_JSON_Specification spec[] = { - GNUNET_JSON_spec_uint64 ("payment_target_uuid", - &wr.details.accepted.payment_target_uuid), - GNUNET_JSON_spec_end () - }; - - if (GNUNET_OK != - GNUNET_JSON_parse (hr->reply, - spec, - NULL, NULL)) - { - GNUNET_break_op (0); - wr.hr.http_status = 0; - wr.hr.ec = TALER_EC_GENERIC_REPLY_MALFORMED; - break; - } - } - break; - default: - break; - } - wh->cb (wh->cb_cls, - &wr); - if (MHD_HTTP_OK == hr->http_status) - TALER_denom_sig_free (&wr.details.success.sig); - TALER_EXCHANGE_withdraw_cancel (wh); -} - - -/** - * Function called when stage 1 of CS withdraw is finished (request r_pub's) - * - * @param cls the `struct TALER_EXCHANGE_WithdrawHandle` - * @param csrr replies from the /csr-withdraw request - */ -static void -withdraw_cs_stage_two_callback ( - void *cls, - const struct TALER_EXCHANGE_CsRWithdrawResponse *csrr) -{ - struct TALER_EXCHANGE_WithdrawHandle *wh = cls; - struct TALER_EXCHANGE_WithdrawResponse wr = { - .hr = csrr->hr - }; - - wh->csrh = NULL; - GNUNET_assert (TALER_DENOMINATION_CS == wh->pk.key.cipher); - switch (csrr->hr.http_status) - { - case MHD_HTTP_OK: - wh->alg_values = csrr->details.success.alg_values; - TALER_planchet_setup_coin_priv (&wh->ps, - &wh->alg_values, - &wh->priv); - TALER_planchet_blinding_secret_create (&wh->ps, - &wh->alg_values, - &wh->bks); - /* This initializes the 2nd half of the - wh->pd.blinded_planchet! */ - if (GNUNET_OK != - TALER_planchet_prepare (&wh->pk.key, - &wh->alg_values, - &wh->bks, - &wh->priv, - wh->ach, - &wh->c_hash, - &wh->pd)) - { - GNUNET_break (0); - GNUNET_free (wh); - } - wh->wh2 = TALER_EXCHANGE_withdraw2 (wh->exchange, - &wh->pd, - wh->reserve_priv, - &handle_reserve_withdraw_finished, - wh); - return; - default: - break; - } - wh->cb (wh->cb_cls, - &wr); - TALER_EXCHANGE_withdraw_cancel (wh); -} - - -struct TALER_EXCHANGE_WithdrawHandle * -TALER_EXCHANGE_withdraw ( - struct TALER_EXCHANGE_Handle *exchange, - const struct TALER_ReservePrivateKeyP *reserve_priv, - const struct TALER_EXCHANGE_WithdrawCoinInput *wci, - TALER_EXCHANGE_WithdrawCallback res_cb, - void *res_cb_cls) -{ - struct TALER_EXCHANGE_WithdrawHandle *wh; - - wh = GNUNET_new (struct TALER_EXCHANGE_WithdrawHandle); - wh->exchange = exchange; - wh->cb = res_cb; - wh->cb_cls = res_cb_cls; - wh->reserve_priv = reserve_priv; - wh->ps = *wci->ps; - wh->ach = wci->ach; - wh->pk = *wci->pk; - TALER_denom_pub_deep_copy (&wh->pk.key, - &wci->pk->key); - - switch (wci->pk->key.cipher) - { - case TALER_DENOMINATION_RSA: - { - wh->alg_values.cipher = TALER_DENOMINATION_RSA; - TALER_planchet_setup_coin_priv (&wh->ps, - &wh->alg_values, - &wh->priv); - TALER_planchet_blinding_secret_create (&wh->ps, - &wh->alg_values, - &wh->bks); - if (GNUNET_OK != - TALER_planchet_prepare (&wh->pk.key, - &wh->alg_values, - &wh->bks, - &wh->priv, - wh->ach, - &wh->c_hash, - &wh->pd)) - { - GNUNET_break (0); - GNUNET_free (wh); - return NULL; - } - wh->wh2 = TALER_EXCHANGE_withdraw2 (exchange, - &wh->pd, - wh->reserve_priv, - &handle_reserve_withdraw_finished, - wh); - break; - } - case TALER_DENOMINATION_CS: - { - TALER_cs_withdraw_nonce_derive ( - &wh->ps, - &wh->pd.blinded_planchet.details.cs_blinded_planchet.nonce); - /* Note that we only initialize the first half - of the blinded_planchet here; the other part - will be done after the /csr-withdraw request! */ - wh->pd.blinded_planchet.cipher = TALER_DENOMINATION_CS; - wh->csrh = TALER_EXCHANGE_csr_withdraw ( - exchange, - &wh->pk, - &wh->pd.blinded_planchet.details.cs_blinded_planchet.nonce, - &withdraw_cs_stage_two_callback, - wh); - break; - } - default: - GNUNET_break (0); - GNUNET_free (wh); - return NULL; - } - return wh; -} - - -void -TALER_EXCHANGE_withdraw_cancel (struct TALER_EXCHANGE_WithdrawHandle *wh) -{ - TALER_blinded_planchet_free (&wh->pd.blinded_planchet); - if (NULL != wh->csrh) - { - TALER_EXCHANGE_csr_withdraw_cancel (wh->csrh); - wh->csrh = NULL; - } - if (NULL != wh->wh2) - { - TALER_EXCHANGE_withdraw2_cancel (wh->wh2); - wh->wh2 = NULL; - } - TALER_denom_pub_free (&wh->pk.key); - GNUNET_free (wh); -} |