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-rw-r--r--src/lib/testing_api_cmd_recoup.c620
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diff --git a/src/lib/testing_api_cmd_recoup.c b/src/lib/testing_api_cmd_recoup.c
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+/*
+ This file is part of TALER
+ Copyright (C) 2014-2018 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/testing_api_cmd_recoup.c
+ * @brief Implement the /revoke and /recoup test commands.
+ * @author Marcello Stanisci
+ */
+#include "platform.h"
+#include "taler_json_lib.h"
+#include <gnunet/gnunet_curl_lib.h>
+#include "exchange_api_handle.h"
+#include "taler_testing_lib.h"
+
+
+/**
+ * State for a "revoke" CMD.
+ */
+struct RevokeState
+{
+ /**
+ * Expected HTTP status code.
+ */
+ unsigned int expected_response_code;
+
+ /**
+ * Command that offers a denomination to revoke.
+ */
+ const char *coin_reference;
+
+ /**
+ * The interpreter state.
+ */
+ struct TALER_TESTING_Interpreter *is;
+
+ /**
+ * The revoke process handle.
+ */
+ struct GNUNET_OS_Process *revoke_proc;
+
+ /**
+ * Configuration file name.
+ */
+ const char *config_filename;
+
+ /**
+ * Encoding of the denomination (to revoke) public key hash.
+ */
+ char *dhks;
+
+};
+
+
+/**
+ * State for a "pay back" CMD.
+ */
+struct RecoupState
+{
+ /**
+ * Expected HTTP status code.
+ */
+ unsigned int expected_response_code;
+
+ /**
+ * Command that offers a reserve private key,
+ * plus a coin to be paid back.
+ */
+ const char *coin_reference;
+
+ /**
+ * The interpreter state.
+ */
+ struct TALER_TESTING_Interpreter *is;
+
+ /**
+ * Amount expected to be paid back.
+ */
+ const char *amount;
+
+ /**
+ * Handle to the ongoing operation.
+ */
+ struct TALER_EXCHANGE_RecoupHandle *ph;
+
+ /**
+ * NULL if coin was not refreshed, otherwise reference
+ * to the melt operation underlying @a coin_reference.
+ */
+ const char *melt_reference;
+
+};
+
+
+/**
+ * Parser reference to a coin.
+ *
+ * @param coin_reference of format $LABEL['#' $INDEX]?
+ * @param[out] cref where we return a copy of $LABEL
+ * @param[out] idx where we set $INDEX
+ * @return #GNUNET_SYSERR if $INDEX is present but not numeric
+ */
+static int
+parse_coin_reference (const char *coin_reference,
+ char **cref,
+ unsigned int *idx)
+{
+ const char *index;
+
+ /* We allow command references of the form "$LABEL#$INDEX" or
+ just "$LABEL", which implies the index is 0. Figure out
+ which one it is. */
+ index = strchr (coin_reference, '#');
+ if (NULL == index)
+ {
+ *idx = 0;
+ *cref = GNUNET_strdup (coin_reference);
+ return GNUNET_OK;
+ }
+ *cref = GNUNET_strndup (coin_reference,
+ index - coin_reference);
+ if (1 != sscanf (index + 1,
+ "%u",
+ idx))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Numeric index (not `%s') required after `#' in command reference of command in %s:%u\n",
+ index,
+ __FILE__,
+ __LINE__);
+ GNUNET_free (*cref);
+ *cref = NULL;
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Check the result of the recoup request: checks whether
+ * the HTTP response code is good, and that the coin that
+ * was paid back belonged to the right reserve.
+ *
+ * @param cls closure
+ * @param http_status HTTP response code.
+ * @param ec taler-specific error code.
+ * @param amount amount the exchange will wire back for this coin.
+ * @param timestamp what time did the exchange receive the
+ * /recoup request
+ * @param reserve_pub public key of the reserve receiving the recoup, NULL if refreshed or on error
+ * @param old_coin_pub public key of the dirty coin, NULL if not refreshed or on error
+ * @param full_response raw response from the exchange.
+ */
+static void
+recoup_cb (void *cls,
+ unsigned int http_status,
+ enum TALER_ErrorCode ec,
+ const struct TALER_Amount *amount,
+ struct GNUNET_TIME_Absolute timestamp,
+ const struct TALER_ReservePublicKeyP *reserve_pub,
+ const struct TALER_CoinSpendPublicKeyP *old_coin_pub,
+ const json_t *full_response)
+{
+ struct RecoupState *ps = cls;
+ struct TALER_TESTING_Interpreter *is = ps->is;
+ struct TALER_TESTING_Command *cmd = &is->commands[is->ip];
+ const struct TALER_TESTING_Command *reserve_cmd;
+ char *cref;
+ unsigned int idx;
+
+ ps->ph = NULL;
+ if (ps->expected_response_code != http_status)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Unexpected response code %u to command %s in %s:%u\n",
+ http_status,
+ cmd->label,
+ __FILE__,
+ __LINE__);
+ json_dumpf (full_response, stderr, 0);
+ fprintf (stderr, "\n");
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+
+ if (GNUNET_OK !=
+ parse_coin_reference (ps->coin_reference,
+ &cref,
+ &idx))
+ {
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+
+ reserve_cmd = TALER_TESTING_interpreter_lookup_command
+ (is, cref);
+ GNUNET_free (cref);
+
+ if (NULL == reserve_cmd)
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+
+ switch (http_status)
+ {
+ case MHD_HTTP_OK:
+ /* first, check amount */
+ {
+ struct TALER_Amount expected_amount;
+
+ if (GNUNET_OK !=
+ TALER_string_to_amount (ps->amount, &expected_amount))
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+ if (0 != TALER_amount_cmp (amount, &expected_amount))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Total amount missmatch to command %s\n",
+ cmd->label);
+ json_dumpf (full_response, stderr, 0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+ }
+ /* now, check old_coin_pub or reserve_pub, respectively */
+ if (NULL != ps->melt_reference)
+ {
+ const struct TALER_TESTING_Command *melt_cmd;
+ const struct TALER_CoinSpendPrivateKeyP *dirty_priv;
+ struct TALER_CoinSpendPublicKeyP oc;
+
+ melt_cmd = TALER_TESTING_interpreter_lookup_command (is,
+ ps->melt_reference);
+ if (NULL == melt_cmd)
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+ if (GNUNET_OK !=
+ TALER_TESTING_get_trait_coin_priv (melt_cmd,
+ 0,
+ &dirty_priv))
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+ GNUNET_CRYPTO_eddsa_key_get_public (&dirty_priv->eddsa_priv,
+ &oc.eddsa_pub);
+ if (0 != GNUNET_memcmp (&oc,
+ old_coin_pub))
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+ }
+ else
+ {
+ const struct TALER_ReservePrivateKeyP *reserve_priv;
+ struct TALER_ReservePublicKeyP rp;
+
+ if (NULL == reserve_pub)
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+ if (GNUNET_OK != TALER_TESTING_get_trait_reserve_priv
+ (reserve_cmd, idx, &reserve_priv))
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+ GNUNET_CRYPTO_eddsa_key_get_public (&reserve_priv->eddsa_priv,
+ &rp.eddsa_pub);
+ if (0 != GNUNET_memcmp (reserve_pub, &rp))
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+ }
+ break;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Unmanaged HTTP status code %u.\n",
+ http_status);
+ break;
+ }
+ TALER_TESTING_interpreter_next (is);
+}
+
+
+/**
+ * Run the command.
+ *
+ * @param cls closure.
+ * @param cmd the command to execute.
+ * @param is the interpreter state.
+ */
+static void
+recoup_run (void *cls,
+ const struct TALER_TESTING_Command *cmd,
+ struct TALER_TESTING_Interpreter *is)
+{
+ struct RecoupState *ps = cls;
+ const struct TALER_TESTING_Command *coin_cmd;
+ const struct TALER_CoinSpendPrivateKeyP *coin_priv;
+ const struct TALER_DenominationBlindingKeyP *blinding_key;
+ const struct TALER_EXCHANGE_DenomPublicKey *denom_pub;
+ const struct TALER_DenominationSignature *coin_sig;
+ struct TALER_PlanchetSecretsP planchet;
+ char *cref;
+ unsigned int idx;
+
+ ps->is = is;
+ if (GNUNET_OK !=
+ parse_coin_reference (ps->coin_reference,
+ &cref,
+ &idx))
+ {
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+
+ coin_cmd = TALER_TESTING_interpreter_lookup_command
+ (is, cref);
+ GNUNET_free (cref);
+
+ if (NULL == coin_cmd)
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+
+ if (GNUNET_OK != TALER_TESTING_get_trait_coin_priv
+ (coin_cmd, idx, &coin_priv))
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+
+ if (GNUNET_OK != TALER_TESTING_get_trait_blinding_key
+ (coin_cmd, idx, &blinding_key))
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+ planchet.coin_priv = *coin_priv;
+ planchet.blinding_key = *blinding_key;
+
+ if (GNUNET_OK != TALER_TESTING_get_trait_denom_pub
+ (coin_cmd, idx, &denom_pub))
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+
+ if (GNUNET_OK != TALER_TESTING_get_trait_denom_sig
+ (coin_cmd, idx, &coin_sig))
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Trying to get '%s..' paid back\n",
+ TALER_B2S (&denom_pub->h_key));
+
+ ps->ph = TALER_EXCHANGE_recoup (is->exchange,
+ denom_pub,
+ coin_sig,
+ &planchet,
+ NULL != ps->melt_reference,
+ recoup_cb,
+ ps);
+ GNUNET_assert (NULL != ps->ph);
+}
+
+
+/**
+ * Cleanup the state.
+ *
+ * @param cls closure, must be a `struct RevokeState`.
+ * @param cmd the command which is being cleaned up.
+ */
+static void
+revoke_cleanup (void *cls,
+ const struct TALER_TESTING_Command *cmd)
+{
+ struct RevokeState *rs = cls;
+
+ if (NULL != rs->revoke_proc)
+ {
+ GNUNET_break (0 == GNUNET_OS_process_kill
+ (rs->revoke_proc, SIGKILL));
+ GNUNET_OS_process_wait (rs->revoke_proc);
+ GNUNET_OS_process_destroy (rs->revoke_proc);
+ rs->revoke_proc = NULL;
+ }
+ GNUNET_free_non_null (rs->dhks);
+ GNUNET_free (rs);
+}
+
+
+/**
+ * Cleanup the "recoup" CMD state, and possibly cancel
+ * a pending operation thereof.
+ *
+ * @param cls closure.
+ * @param cmd the command which is being cleaned up.
+ */
+static void
+recoup_cleanup (void *cls,
+ const struct TALER_TESTING_Command *cmd)
+{
+ struct RecoupState *ps = cls;
+ if (NULL != ps->ph)
+ {
+ TALER_EXCHANGE_recoup_cancel (ps->ph);
+ ps->ph = NULL;
+ }
+ GNUNET_free (ps);
+}
+
+
+/**
+ * Offer internal data from a "revoke" CMD to other CMDs.
+ *
+ * @param cls closure
+ * @param[out] ret result (could be anything)
+ * @param trait name of the trait
+ * @param index index number of the object to offer.
+ * @return #GNUNET_OK on success
+ */
+static int
+revoke_traits (void *cls,
+ const void **ret,
+ const char *trait,
+ unsigned int index)
+{
+ struct RevokeState *rs = cls;
+ struct TALER_TESTING_Trait traits[] = {
+ /* Needed by the handler which waits the proc'
+ * death and calls the next command */
+ TALER_TESTING_make_trait_process (0, &rs->revoke_proc),
+ TALER_TESTING_trait_end ()
+ };
+
+ return TALER_TESTING_get_trait (traits,
+ ret,
+ trait,
+ index);
+}
+
+
+/**
+ * Run the "revoke" command. The core of the function
+ * is to call the "keyup" utility passing it the base32
+ * encoding of the denomination to revoke.
+ *
+ * @param cls closure.
+ * @param cmd the command to execute.
+ * @param is the interpreter state.
+ */
+static void
+revoke_run (void *cls,
+ const struct TALER_TESTING_Command *cmd,
+ struct TALER_TESTING_Interpreter *is)
+{
+ struct RevokeState *rs = cls;
+ const struct TALER_TESTING_Command *coin_cmd;
+ const struct TALER_EXCHANGE_DenomPublicKey *denom_pub;
+
+ rs->is = is;
+ /* Get denom pub from trait */
+ coin_cmd = TALER_TESTING_interpreter_lookup_command
+ (is, rs->coin_reference);
+
+ if (NULL == coin_cmd)
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+
+ GNUNET_assert (GNUNET_OK == TALER_TESTING_get_trait_denom_pub
+ (coin_cmd, 0, &denom_pub));
+
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Trying to revoke denom '%s..'\n",
+ TALER_B2S (&denom_pub->h_key));
+
+ rs->dhks = GNUNET_STRINGS_data_to_string_alloc
+ (&denom_pub->h_key, sizeof (struct GNUNET_HashCode));
+
+ rs->revoke_proc = GNUNET_OS_start_process
+ (GNUNET_NO,
+ GNUNET_OS_INHERIT_STD_ALL,
+ NULL, NULL, NULL,
+ "taler-exchange-keyup",
+ "taler-exchange-keyup",
+ "-c", rs->config_filename,
+ "-r", rs->dhks,
+ NULL);
+
+ if (NULL == rs->revoke_proc)
+ {
+ GNUNET_break (0);
+ TALER_TESTING_interpreter_fail (is);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Revoke is ongoing..\n");
+
+ is->reload_keys = GNUNET_OK;
+ TALER_TESTING_wait_for_sigchld (is);
+}
+
+
+/**
+ * Make a "recoup" command.
+ *
+ * @param label the command label
+ * @param expected_response_code expected HTTP status code
+ * @param coin_reference reference to any command which
+ * offers a coin & reserve private key.
+ * @param amount denomination to pay back.
+ * @param melt_reference NULL if coin was not refreshed
+ * @return the command.
+ */
+struct TALER_TESTING_Command
+TALER_TESTING_cmd_recoup (const char *label,
+ unsigned int expected_response_code,
+ const char *coin_reference,
+ const char *amount,
+ const char *melt_reference)
+{
+ struct RecoupState *ps;
+
+ ps = GNUNET_new (struct RecoupState);
+ ps->expected_response_code = expected_response_code;
+ ps->coin_reference = coin_reference;
+ ps->amount = amount;
+ ps->melt_reference = melt_reference;
+ {
+ struct TALER_TESTING_Command cmd = {
+ .cls = ps,
+ .label = label,
+ .run = &recoup_run,
+ .cleanup = &recoup_cleanup
+ };
+
+ return cmd;
+ }
+}
+
+
+/**
+ * Make a "revoke" command.
+ *
+ * @param label the command label.
+ * @param expected_response_code expected HTTP status code.
+ * @param coin_reference reference to a CMD that will offer the
+ * denomination to revoke.
+ * @param config_filename configuration file name.
+ * @return the command.
+ */
+struct TALER_TESTING_Command
+TALER_TESTING_cmd_revoke (const char *label,
+ unsigned int expected_response_code,
+ const char *coin_reference,
+ const char *config_filename)
+{
+
+ struct RevokeState *rs;
+
+ rs = GNUNET_new (struct RevokeState);
+ rs->expected_response_code = expected_response_code;
+ rs->coin_reference = coin_reference;
+ rs->config_filename = config_filename;
+ {
+ struct TALER_TESTING_Command cmd = {
+ .cls = rs,
+ .label = label,
+ .run = &revoke_run,
+ .cleanup = &revoke_cleanup,
+ .traits = &revoke_traits
+ };
+
+ return cmd;
+ }
+}