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Merge branch 'master' of git.taler.net:/var/git/exchange

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This commit is contained in:
Jeff Burdges 2016-06-14 16:52:33 +02:00
commit 877c5d9180
12 changed files with 617 additions and 272 deletions
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5
ChangeLog
View File

@ -1,3 +1,8 @@
Mon Jun 13 16:35:09 CEST 2016
Splitting HTTP service to run on different listen
sockets for /admin and /test-APIs and the normal public
APIs (#4569). -CG
Thu Jun 9 19:17:02 CEST 2016 Thu Jun 9 19:17:02 CEST 2016
Rename /deposit/wtid to /track/transaction and Rename /deposit/wtid to /track/transaction and
/wire/deposits to /track/transfer. -CG /wire/deposits to /track/transfer. -CG

131
src/benchmark/taler-exchange-benchmark.c
View File

@ -57,7 +57,6 @@ static unsigned int nreserves;
*/ */
unsigned int ncoins; unsigned int ncoins;
/** /**
* Bank details of who creates reserves * Bank details of who creates reserves
*/ */
@ -87,6 +86,11 @@ struct RefreshRevealCls {
* Which coin in the list are we melting * Which coin in the list are we melting
*/ */
unsigned int coin_index; unsigned int coin_index;
/**
* Array of denominations expected to get from melt
*/
struct TALER_Amount *denoms;
}; };
/** /**
@ -167,6 +171,12 @@ struct Coin {
*/ */
unsigned int refresh; unsigned int refresh;
/**
* If the coin has to be refreshed, this value indicates
* how much is left on this coin
*/
struct TALER_Amount left;
/** /**
* Refresh melt handle * Refresh melt handle
*/ */
@ -179,7 +189,6 @@ struct Coin {
}; };
/** /**
* Handle to the exchange's process * Handle to the exchange's process
*/ */
@ -215,16 +224,6 @@ static struct Reserve *reserves;
*/ */
static struct Coin *coins; static struct Coin *coins;
/**
* Indices of spent coins
*/
static unsigned int *spent_coins;
/**
* Current number of spent coins
*/
static unsigned int spent_coins_size = 0;
/** /**
* Transaction id counter, used in /deposit's * Transaction id counter, used in /deposit's
*/ */
@ -412,29 +411,31 @@ reveal_cb (void *cls,
return; return;
} }
else else
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO, GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Coin #%d revealed!\n", "Coin #%d revealed!\n",
rrcls->coin_index); rrcls->coin_index);
coins[rrcls->coin_index].left.value = 0;
}
keys = TALER_EXCHANGE_get_keys (exchange); keys = TALER_EXCHANGE_get_keys (exchange);
for (i=0; i<num_coins; i++) for (i=0; i<num_coins; i++)
{ {
struct Coin fresh_coin; struct Coin fresh_coin;
struct TALER_Amount amount; char *revealed_str;
char *refresh_denom;
GNUNET_asprintf (&refresh_denom, revealed_str = TALER_amount_to_string (&rrcls->denoms[i]);
"%s:%s", GNUNET_log (GNUNET_ERROR_TYPE_INFO,
currency, "revealing %s "
refresh_denoms[i]); "# of coins after refresh: %d\n",
revealed_str,
ncoins);
GNUNET_free (revealed_str);
fresh_coin.reserve_index = coins[rrcls->coin_index].reserve_index; fresh_coin.reserve_index = coins[rrcls->coin_index].reserve_index;
TALER_string_to_amount (refresh_denom, &amount); fresh_coin.pk = find_pk (keys, &rrcls->denoms[i]);
GNUNET_free (refresh_denom);
fresh_coin.pk = find_pk (keys, &amount);
fresh_coin.sig = sigs[i]; fresh_coin.sig = sigs[i];
GNUNET_array_append (coins, ncoins, fresh_coin); GNUNET_array_append (coins, ncoins, fresh_coin);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"# of coins after refresh: %d\n",
ncoins);
} }
GNUNET_free (rrcls); GNUNET_free (rrcls);
} }
@ -457,8 +458,8 @@ melt_cb (void *cls,
const struct TALER_ExchangePublicKeyP *exchange_pub, const struct TALER_ExchangePublicKeyP *exchange_pub,
const json_t *full_response) const json_t *full_response)
{ {
/* free'd in `reveal_cb` */
struct RefreshRevealCls *rrcls = cls; struct RefreshRevealCls *rrcls = cls;
/* FIXME to be freed */
coins[rrcls->coin_index].rmh = NULL; coins[rrcls->coin_index].rmh = NULL;
if (MHD_HTTP_OK != http_status) if (MHD_HTTP_OK != http_status)
@ -467,12 +468,13 @@ melt_cb (void *cls,
fail ("Coin not correctly melted!\n"); fail ("Coin not correctly melted!\n");
return; return;
} }
coins[rrcls->coin_index].rrh coins[rrcls->coin_index].rrh
= TALER_EXCHANGE_refresh_reveal (exchange, = TALER_EXCHANGE_refresh_reveal (exchange,
rrcls->blob_size, rrcls->blob_size,
rrcls->blob, rrcls->blob,
noreveal_index, noreveal_index,
reveal_cb, &reveal_cb,
rrcls); rrcls);
} }
@ -519,30 +521,52 @@ deposit_cb (void *cls,
fail ("At least one coin has not been deposited, status: %d\n"); fail ("At least one coin has not been deposited, status: %d\n");
return; return;
} }
GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Coin #%d correctly spent!\n", coin_index); GNUNET_log (GNUNET_ERROR_TYPE_INFO,
GNUNET_array_append (spent_coins, spent_coins_size, coin_index); "Coin #%d correctly spent!\n",
spent_coins_size++; coin_index);
if (GNUNET_YES == coins[coin_index].refresh) if (GNUNET_YES == coins[coin_index].refresh)
{ {
struct TALER_Amount melt_amount;
struct RefreshRevealCls *rrcls; struct RefreshRevealCls *rrcls;
TALER_amount_get_zero (currency, &melt_amount);
melt_amount.value = 7;
char *blob; char *blob;
size_t blob_size; size_t blob_size;
const struct TALER_EXCHANGE_Keys *keys;
struct TALER_Amount *denoms = NULL;
struct TALER_EXCHANGE_DenomPublicKey *dpks = NULL;
const struct TALER_EXCHANGE_DenomPublicKey *curr_dpk;
struct TALER_Amount curr;
unsigned int ndenoms = 0;
unsigned int ndenoms2 = 0;
unsigned long long acc_value;
TALER_amount_get_zero (currency, &curr);
curr.value = COIN_VALUE >> 1;
acc_value = 0;
keys = TALER_EXCHANGE_get_keys (exchange);
for (; curr.value > 0; curr.value = curr.value >> 1)
{
if (acc_value + curr.value <= coins[coin_index].left.value)
{
GNUNET_array_append (denoms, ndenoms, curr);
GNUNET_assert (NULL != (curr_dpk = find_pk (keys, &curr)));
GNUNET_array_append (dpks, ndenoms2, *curr_dpk);
acc_value += curr.value;
}
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"# of coins to get in melt: %d\n",
ndenoms2);
blob = TALER_EXCHANGE_refresh_prepare (&coins[coin_index].coin_priv, blob = TALER_EXCHANGE_refresh_prepare (&coins[coin_index].coin_priv,
&melt_amount, &coins[coin_index].left,
&coins[coin_index].sig, &coins[coin_index].sig,
coins[coin_index].pk, coins[coin_index].pk,
GNUNET_YES, GNUNET_YES,
refresh_pk_len, ndenoms2,
refresh_pk, dpks,
&blob_size); &blob_size);
if (NULL == blob) if (NULL == blob)
{ {
fail ("Failed to prepare refresh"); fail ("Failed to prepare refresh\n");
return; return;
} }
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
@ -550,14 +574,11 @@ deposit_cb (void *cls,
(unsigned int) blob_size); (unsigned int) blob_size);
refreshed_once = GNUNET_YES; refreshed_once = GNUNET_YES;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"# of coins to get in melt: %d\n",
refresh_pk_len);
rrcls = GNUNET_new (struct RefreshRevealCls); rrcls = GNUNET_new (struct RefreshRevealCls);
rrcls->blob = blob; rrcls->blob = blob;
rrcls->blob_size = blob_size; rrcls->blob_size = blob_size;
rrcls->coin_index = coin_index; rrcls->coin_index = coin_index;
rrcls->denoms = denoms;
coins[coin_index].rmh = TALER_EXCHANGE_refresh_melt (exchange, coins[coin_index].rmh = TALER_EXCHANGE_refresh_melt (exchange,
blob_size, blob_size,
blob, blob,
@ -589,7 +610,8 @@ deposit_cb (void *cls,
/** /**
* Function called upon completion of our /reserve/withdraw request. * Function called upon completion of our /reserve/withdraw request.
* This is merely the function which spends withdrawn coins * This is merely the function which spends withdrawn coins. For each
* spent coin, ti either refresh it or re-withdraw it.
* *
* @param cls closure with the interpreter state * @param cls closure with the interpreter state
* @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request * @param http_status HTTP response code, #MHD_HTTP_OK (200) for successful status request
@ -613,7 +635,7 @@ reserve_withdraw_cb (void *cls,
fail ("At least one coin has not correctly been withdrawn\n"); fail ("At least one coin has not correctly been withdrawn\n");
return; return;
} }
GNUNET_log (GNUNET_ERROR_TYPE_INFO, GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"%d-th coin withdrawn\n", "%d-th coin withdrawn\n",
coin_index); coin_index);
coins[coin_index].sig.rsa_signature = coins[coin_index].sig.rsa_signature =
@ -646,18 +668,20 @@ reserve_withdraw_cb (void *cls,
if (GNUNET_YES == eval_probability (REFRESH_PROBABILITY) if (GNUNET_YES == eval_probability (REFRESH_PROBABILITY)
&& GNUNET_NO == refreshed_once) && GNUNET_NO == refreshed_once)
{ {
/**
* Always spending 1 out of 8 KUDOS. To be improved by randomly
* picking the spent amount
*/
struct TALER_Amount one; struct TALER_Amount one;
TALER_amount_get_zero (currency, &one); TALER_amount_get_zero (currency, &one);
one.value = 1; one.value = 1;
/**
* If the coin is going to be refreshed, only 1 unit
* of currency will be spent, since 4 units are going
* to be refreshed
*/
TALER_amount_subtract (&amount, TALER_amount_subtract (&amount,
&one, &one,
&coins[coin_index].pk->fee_deposit); &coins[coin_index].pk->fee_deposit);
TALER_amount_subtract (&coins[coin_index].left,
&coins[coin_index].pk->value,
&one);
coins[coin_index].refresh = GNUNET_YES; coins[coin_index].refresh = GNUNET_YES;
refreshed_once = GNUNET_YES; refreshed_once = GNUNET_YES;
} }
@ -826,6 +850,7 @@ benchmark_run (void *cls)
&reserve_pub.eddsa_pub); &reserve_pub.eddsa_pub);
reserves[i].aih = TALER_EXCHANGE_admin_add_incoming (exchange, reserves[i].aih = TALER_EXCHANGE_admin_add_incoming (exchange,
"http://localhost:18080/",
&reserve_pub, &reserve_pub,
&reserve_amount, &reserve_amount,
execution_date, execution_date,
@ -837,6 +862,9 @@ benchmark_run (void *cls)
json_decref (transfer_details); json_decref (transfer_details);
} }
json_decref (sender_details); json_decref (sender_details);
sender_details = NULL;
transfer_details = NULL;
GNUNET_log (GNUNET_ERROR_TYPE_INFO, GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"benchmark_run() returns\n"); "benchmark_run() returns\n");
} }
@ -847,7 +875,7 @@ benchmark_run (void *cls)
* since that is the only amount refreshed so far by the benchmark * since that is the only amount refreshed so far by the benchmark
* *
* @param NULL-terminated array of value.fraction pairs * @param NULL-terminated array of value.fraction pairs
* @return GNUNET_OK if the array is correctly built, GNUNET_SYSERR * @return #GNUNET_OK if the array is correctly built, #GNUNET_SYSERR
* otherwise * otherwise
*/ */
static unsigned int static unsigned int
@ -994,7 +1022,6 @@ do_shutdown (void *cls)
GNUNET_free_non_null (reserves); GNUNET_free_non_null (reserves);
GNUNET_free_non_null (coins); GNUNET_free_non_null (coins);
GNUNET_free_non_null (spent_coins);
GNUNET_free_non_null (currency); GNUNET_free_non_null (currency);
if (NULL != exchange) if (NULL != exchange)
@ -1085,10 +1112,6 @@ run (void *cls)
NULL); NULL);
GNUNET_CONFIGURATION_destroy (cfg); GNUNET_CONFIGURATION_destroy (cfg);
GNUNET_array_append (spent_coins,
spent_coins_size,
1);
spent_coins_size++;
reserves = NULL; reserves = NULL;
coins = NULL; coins = NULL;
ctx = GNUNET_CURL_init (&GNUNET_CURL_gnunet_scheduler_reschedule, ctx = GNUNET_CURL_init (&GNUNET_CURL_gnunet_scheduler_reschedule,

5
src/exchange-lib/exchange_api_admin.c
View File

@ -141,6 +141,7 @@ handle_admin_add_incoming_finished (void *cls,
* to the operators of the exchange. * to the operators of the exchange.
* *
* @param exchange the exchange handle; the exchange must be ready to operate * @param exchange the exchange handle; the exchange must be ready to operate
* @param admin_url URL of the administrative interface of the exchange
* @param reserve_pub public key of the reserve * @param reserve_pub public key of the reserve
* @param amount amount that was deposited * @param amount amount that was deposited
* @param execution_date when did we receive the amount * @param execution_date when did we receive the amount
@ -156,6 +157,7 @@ handle_admin_add_incoming_finished (void *cls,
*/ */
struct TALER_EXCHANGE_AdminAddIncomingHandle * struct TALER_EXCHANGE_AdminAddIncomingHandle *
TALER_EXCHANGE_admin_add_incoming (struct TALER_EXCHANGE_Handle *exchange, TALER_EXCHANGE_admin_add_incoming (struct TALER_EXCHANGE_Handle *exchange,
const char *admin_url,
const struct TALER_ReservePublicKeyP *reserve_pub, const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_Amount *amount, const struct TALER_Amount *amount,
struct GNUNET_TIME_Absolute execution_date, struct GNUNET_TIME_Absolute execution_date,
@ -188,7 +190,8 @@ TALER_EXCHANGE_admin_add_incoming (struct TALER_EXCHANGE_Handle *exchange,
aai->exchange = exchange; aai->exchange = exchange;
aai->cb = res_cb; aai->cb = res_cb;
aai->cb_cls = res_cb_cls; aai->cb_cls = res_cb_cls;
aai->url = MAH_path_to_url (exchange, "/admin/add/incoming"); aai->url = MAH_path_to_url2 (admin_url,
"/admin/add/incoming");
eh = curl_easy_init (); eh = curl_easy_init ();
GNUNET_assert (NULL != (aai->json_enc = GNUNET_assert (NULL != (aai->json_enc =

26
src/exchange-lib/exchange_api_handle.c
View File

@ -779,23 +779,39 @@ MAH_handle_is_ready (struct TALER_EXCHANGE_Handle *h)
/** /**
* Obtain the URL to use for an API request. * Obtain the URL to use for an API request.
* *
* @param h the exchange handle to query * @param base_url base URL of the exchange (i.e. "http://exchange/")
* @param path Taler API path (i.e. "/reserve/withdraw") * @param path Taler API path (i.e. "/reserve/withdraw")
* @return the full URI to use with cURL * @return the full URI to use with cURL
*/ */
char * char *
MAH_path_to_url (struct TALER_EXCHANGE_Handle *h, MAH_path_to_url (struct TALER_EXCHANGE_Handle *exchange,
const char *path)
{
return MAH_path_to_url2 (exchange->url,
path);
}
/**
* Obtain the URL to use for an API request.
*
* @param base_url base URL of the exchange (i.e. "http://exchange/")
* @param path Taler API path (i.e. "/reserve/withdraw")
* @return the full URI to use with cURL
*/
char *
MAH_path_to_url2 (const char *base_url,
const char *path) const char *path)
{ {
char *url; char *url;
if ( ('/' == path[0]) && if ( ('/' == path[0]) &&
(0 < strlen (h->url)) && (0 < strlen (base_url)) &&
('/' == h->url[strlen (h->url) - 1]) ) ('/' == base_url[strlen (base_url) - 1]) )
path++; /* avoid generating URL with "//" from concat */ path++; /* avoid generating URL with "//" from concat */
GNUNET_asprintf (&url, GNUNET_asprintf (&url,
"%s%s", "%s%s",
h->url, base_url,
path); path);
return url; return url;
} }

11
src/exchange-lib/exchange_api_handle.h
View File

@ -55,5 +55,16 @@ char *
MAH_path_to_url (struct TALER_EXCHANGE_Handle *h, MAH_path_to_url (struct TALER_EXCHANGE_Handle *h,
const char *path); const char *path);
/**
* Obtain the URL to use for an API request.
*
* @param base_url base URL of the exchange (i.e. "http://exchange/")
* @param path Taler API path (i.e. "/reserve/withdraw")
* @return the full URI to use with cURL
*/
char *
MAH_path_to_url2 (const char *base_url,
const char *path);
/* end of exchange_api_handle.h */ /* end of exchange_api_handle.h */

1
src/exchange-lib/test_exchange_api.c
View File

@ -1753,6 +1753,7 @@ interpreter_run (void *cls)
GNUNET_TIME_round_abs (&execution_date); GNUNET_TIME_round_abs (&execution_date);
cmd->details.admin_add_incoming.aih cmd->details.admin_add_incoming.aih
= TALER_EXCHANGE_admin_add_incoming (exchange, = TALER_EXCHANGE_admin_add_incoming (exchange,
"http://localhost:18080/",
&reserve_pub, &reserve_pub,
&amount, &amount,
execution_date, execution_date,

38
src/exchange/exchange.conf
View File

@ -11,17 +11,6 @@ KEYDIR = ${TALER_DATA_HOME}/exchange/live-keys/
# the actual coin operations. # the actual coin operations.
# WIREFORMAT = test # WIREFORMAT = test
# serve via tcp socket (on PORT)
SERVE = tcp
# Unix domain socket to listen on,
# only effective with "SERVE = unix"
UNIXPATH = ${TALER_RUNTIME_DIR}/exchange.http
UNIXPATH_MODE = 660
# HTTP port the exchange listens to
PORT = 8081
# Master public key used to sign the exchange's various keys # Master public key used to sign the exchange's various keys
# MASTER_PUBLIC_KEY = 98NJW3CQHZQGQXTY3K85K531XKPAPAVV4Q5V8PYYRR00NJGZWNVG # MASTER_PUBLIC_KEY = 98NJW3CQHZQGQXTY3K85K531XKPAPAVV4Q5V8PYYRR00NJGZWNVG
@ -34,3 +23,30 @@ DB = postgres
# Where do we store the offline master private key of the exchange? # Where do we store the offline master private key of the exchange?
MASTER_PRIV_FILE = ${TALER_DATA_HOME}/exchange/offline-keys/master.priv MASTER_PRIV_FILE = ${TALER_DATA_HOME}/exchange/offline-keys/master.priv
# Network configuration for the normal API/service HTTP server
# serve via tcp socket (on PORT)
SERVE = tcp
# Unix domain socket to listen on,
# only effective with "SERVE = unix"
UNIXPATH = ${TALER_RUNTIME_DIR}/exchange.http
UNIXPATH_MODE = 660
# HTTP port the exchange listens to
PORT = 8081
[exchange-admin]
# Network configuration for the /admin HTTP server
# serve via tcp socket (on PORT)
SERVE = tcp
# Unix domain socket to listen on,
# only effective with "SERVE = unix"
UNIXPATH = ${TALER_RUNTIME_DIR}/exchange-admin.http
UNIXPATH_MODE = 660
# HTTP port the exchange listens to
PORT = 18080

579
src/exchange/taler-exchange-httpd.c
View File

@ -88,24 +88,50 @@ static unsigned int connection_timeout = 30;
/** /**
* The HTTP Daemon. * The HTTP Daemon.
*/ */
static struct MHD_Daemon *mydaemon; static struct MHD_Daemon *mhd;
/**
* The HTTP Daemon for /admin-requests.
*/
static struct MHD_Daemon *mhd_admin;
/**
* Do not offer /admin API.
*/
static int no_admin;
/** /**
* Port to run the daemon on. * Port to run the daemon on.
*/ */
static uint16_t serve_port; static uint16_t serve_port;
/**
* Port to run the admin daemon on.
*/
static uint16_t serve_admin_port;
/** /**
* Path for the unix domain-socket * Path for the unix domain-socket
* to run the daemon on. * to run the daemon on.
*/ */
static char *serve_unixpath; static char *serve_unixpath;
/**
* Path for the unix domain-socket
* to run the admin daemon on.
*/
static char *serve_admin_unixpath;
/** /**
* File mode for unix-domain socket. * File mode for unix-domain socket.
*/ */
static mode_t unixpath_mode; static mode_t unixpath_mode;
/**
* File mode for unix-domain socket.
*/
static mode_t unixpath_admin_mode;
/** /**
* Function called whenever MHD is done with a request. If the * Function called whenever MHD is done with a request. If the
@ -251,14 +277,6 @@ handle_mhd_request (void *cls,
"Only GET is allowed", 0, "Only GET is allowed", 0,
&TMH_MHD_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED }, &TMH_MHD_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
/* FIXME: maybe conditionally compile these? */
{ "/admin/add/incoming", MHD_HTTP_METHOD_POST, "application/json",
NULL, 0,
&TMH_ADMIN_handler_admin_add_incoming, MHD_HTTP_OK },
{ "/admin/add/incoming", NULL, "text/plain",
"Only POST is allowed", 0,
&TMH_MHD_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
{ "/track/transfer", MHD_HTTP_METHOD_GET, "application/json", { "/track/transfer", MHD_HTTP_METHOD_GET, "application/json",
NULL, 0, NULL, 0,
&TMH_TRACKING_handler_track_transfer, MHD_HTTP_OK }, &TMH_TRACKING_handler_track_transfer, MHD_HTTP_OK },
@ -272,6 +290,74 @@ handle_mhd_request (void *cls,
"Only POST is allowed", 0, "Only POST is allowed", 0,
&TMH_MHD_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED }, &TMH_MHD_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
{ NULL, NULL, NULL, NULL, 0, 0 }
};
static struct TMH_RequestHandler h404 =
{
"", NULL, "text/html",
"<html><title>404: not found</title></html>", 0,
&TMH_MHD_handler_static_response, MHD_HTTP_NOT_FOUND
};
struct TMH_RequestHandler *rh;
unsigned int i;
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Handling request for URL '%s'\n",
url);
for (i=0;NULL != handlers[i].url;i++)
{
rh = &handlers[i];
if ( (0 == strcasecmp (url,
rh->url)) &&
( (NULL == rh->method) ||
(0 == strcasecmp (method,
rh->method)) ) )
return rh->handler (rh,
connection,
con_cls,
upload_data,
upload_data_size);
}
return TMH_MHD_handler_static_response (&h404,
connection,
con_cls,
upload_data,
upload_data_size);
}
/**
* Handle incoming administrative HTTP request.
*
* @param cls closure for MHD daemon (unused)
* @param connection the connection
* @param url the requested url
* @param method the method (POST, GET, ...)
* @param version HTTP version (ignored)
* @param upload_data request data
* @param upload_data_size size of @a upload_data in bytes
* @param con_cls closure for request (a `struct Buffer *`)
* @return MHD result code
*/
static int
handle_mhd_admin_request (void *cls,
struct MHD_Connection *connection,
const char *url,
const char *method,
const char *version,
const char *upload_data,
size_t *upload_data_size,
void **con_cls)
{
static struct TMH_RequestHandler handlers[] =
{
{ "/admin/add/incoming", MHD_HTTP_METHOD_POST, "application/json",
NULL, 0,
&TMH_ADMIN_handler_admin_add_incoming, MHD_HTTP_OK },
{ "/admin/add/incoming", NULL, "text/plain",
"Only POST is allowed", 0,
&TMH_MHD_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
#if HAVE_DEVELOPER #if HAVE_DEVELOPER
/* Client crypto-interoperability test functions */ /* Client crypto-interoperability test functions */
{ "/test", MHD_HTTP_METHOD_POST, "application/json", { "/test", MHD_HTTP_METHOD_POST, "application/json",
@ -374,6 +460,123 @@ handle_mhd_request (void *cls,
} }
/**
* Parse the configuration to determine on which port
* or UNIX domain path we should run an HTTP service.
*
* @param type section of the configuration to parse ("exchange" or "exchange-admin")
* @param[out] port set to the port number, or 0 for none
* @param[out] unix_path set to the UNIX path, or NULL for none
* @param[out] unix_mode set to the mode to be used for @a unix_path
* @return #GNUNET_OK on success
*/
static int
parse_port_config (const char *section,
uint16_t *rport,
char **unix_path,
mode_t *unix_mode)
{
const char *choices[] = {"tcp", "unix"};
const char *serve_type;
unsigned long long port;
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_choice (cfg,
section,
"serve",
choices,
&serve_type))
{
GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
section,
"serve",
"serve type required");
return GNUNET_SYSERR;
}
if (0 == strcmp (serve_type, "tcp"))
{
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_number (cfg,
section,
"port",
&port))
{
GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
section,
"port",
"port number required");
return GNUNET_SYSERR;
}
if ( (0 == port) ||
(port > UINT16_MAX) )
{
fprintf (stderr,
"Invalid configuration (value out of range): %llu is not a valid port\n",
port);
return GNUNET_SYSERR;
}
*rport = (uint16_t) port;
*unix_path = NULL;
return GNUNET_OK;
}
if (0 == strcmp (serve_type, "unix"))
{
struct sockaddr_un s_un;
char *modestring;
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_filename (cfg,
section,
"unixpath",
unix_path))
{
GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
section,
"unixpath",
"unixpath required");
return GNUNET_SYSERR;
}
if (strlen (*unix_path) >= sizeof (s_un.sun_path))
{
fprintf (stderr,
"Invalid configuration: unix path too long\n");
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (cfg,
section,
"unixpath_mode",
&modestring))
{
GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
section,
"unixpath_mode",
"unixpath_mode required");
return GNUNET_SYSERR;
}
errno = 0;
*unix_mode = (mode_t) strtoul (modestring, NULL, 8);
if (0 != errno)
{
GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
section,
"unixpath_mode",
"unixpath_mode required");
GNUNET_free (modestring);
return GNUNET_SYSERR;
}
GNUNET_free (modestring);
return GNUNET_OK;
}
/* not reached */
GNUNET_assert (0);
return GNUNET_SYSERR;
}
/** /**
* Load configuration parameters for the exchange * Load configuration parameters for the exchange
* server into the corresponding global variables. * server into the corresponding global variables.
@ -384,7 +587,6 @@ handle_mhd_request (void *cls,
static int static int
exchange_serve_process_config () exchange_serve_process_config ()
{ {
unsigned long long port;
char *TMH_master_public_key_str; char *TMH_master_public_key_str;
if (GNUNET_OK != if (GNUNET_OK !=
@ -464,115 +666,24 @@ exchange_serve_process_config ()
TMH_plugin->create_tables (TMH_plugin->cls); TMH_plugin->create_tables (TMH_plugin->cls);
} }
{
const char *choices[] = {"tcp", "unix"};
const char *serve_type;
if (GNUNET_OK != if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_choice (cfg, parse_port_config ("exchange",
"exchange", &serve_port,
"serve", &serve_unixpath,
choices, &unixpath_mode))
&serve_type))
{ {
GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
"exchange",
"serve",
"serve type required");
TMH_VALIDATION_done (); TMH_VALIDATION_done ();
return GNUNET_SYSERR; return GNUNET_SYSERR;
} }
if (0 == strcmp (serve_type, "tcp"))
{
if (GNUNET_OK != if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_number (cfg, parse_port_config ("exchange-admin",
"exchange", &serve_admin_port,
"port", &serve_admin_unixpath,
&port)) &unixpath_admin_mode))
{ {
GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
"exchange",
"port",
"port number required");
TMH_VALIDATION_done (); TMH_VALIDATION_done ();
return GNUNET_SYSERR; return GNUNET_SYSERR;
} }
if ( (0 == port) ||
(port > UINT16_MAX) )
{
fprintf (stderr,
"Invalid configuration (value out of range): %llu is not a valid port\n",
port);
TMH_VALIDATION_done ();
return GNUNET_SYSERR;
}
serve_port = (uint16_t) port;
}
else if (0 == strcmp (serve_type, "unix"))
{
struct sockaddr_un s_un;
char *modestring;
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_filename (cfg,
"exchange",
"unixpath",
&serve_unixpath))
{
GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
"exchange",
"unixpath",
"unixpath required");
TMH_VALIDATION_done ();
return GNUNET_SYSERR;
}
if (strlen (serve_unixpath) >= sizeof (s_un.sun_path))
{
fprintf (stderr,
"Invalid configuration: unix path too long\n");
TMH_VALIDATION_done ();
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (cfg,
"exchange",
"unixpath_mode",
&modestring))
{
GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
"exchange",
"unixpath_mode",
"unixpath_mode required");
TMH_VALIDATION_done ();
return GNUNET_SYSERR;
}
errno = 0;
unixpath_mode = (mode_t) strtoul (modestring, NULL, 8);
if (0 != errno)
{
GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_ERROR,
"exchange",
"unixpath_mode",
"unixpath_mode required");
TMH_VALIDATION_done ();
GNUNET_free (modestring);
return GNUNET_SYSERR;
}
GNUNET_free (modestring);
}
else
{
// not reached
GNUNET_assert (0);
}
}
return GNUNET_OK; return GNUNET_OK;
} }
@ -712,6 +823,99 @@ handle_mhd_logs (void *cls,
} }
/**
* Open UNIX domain socket for listining at @a unix_path with
* permissions @a unix_mode.
*
* @param unix_path where to listen
* @param unix_mode access permissions to set
* @return -1 on error, otherwise the listen socket
*/
static int
open_unix_path (const char *unix_path,
mode_t unix_mode)
{
struct GNUNET_NETWORK_Handle *nh;
struct sockaddr_un *un;
int fd;
if (sizeof (un->sun_path) <= strlen (unix_path))
{
fprintf (stderr,
"unixpath `%s' too long\n",
unix_path);
return -1;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Creating listen socket '%s' with mode %o\n",
unix_path,
unix_mode);
if (GNUNET_OK !=
GNUNET_DISK_directory_create_for_file (unix_path))
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
"mkdir",
unix_path);
}
un = GNUNET_new (struct sockaddr_un);
un->sun_family = AF_UNIX;
strncpy (un->sun_path,
unix_path,
sizeof (un->sun_path) - 1);
GNUNET_NETWORK_unix_precheck (un);
if (NULL == (nh = GNUNET_NETWORK_socket_create (AF_UNIX,
SOCK_STREAM,
0)))
{
fprintf (stderr,
"create failed for AF_UNIX\n");
GNUNET_free (un);
return -1;
}
if (GNUNET_OK !=
GNUNET_NETWORK_socket_bind (nh,
(void *) un,
sizeof (struct sockaddr_un)))
{
fprintf (stderr,
"bind failed for AF_UNIX\n");
GNUNET_free (un);
GNUNET_NETWORK_socket_close (nh);
return -1;
}
GNUNET_free (un);
if (GNUNET_OK !=
GNUNET_NETWORK_socket_listen (nh,
UNIX_BACKLOG))
{
fprintf (stderr,
"listen failed for AF_UNIX\n");
GNUNET_NETWORK_socket_close (nh);
return -1;
}
if (0 != chmod (serve_unixpath,
unix_mode))
{
fprintf (stderr,
"chmod failed: %s\n",
strerror (errno));
GNUNET_NETWORK_socket_close (nh);
return -1;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"set socket '%s' to mode %o\n",
unix_path,
unix_mode);
fd = GNUNET_NETWORK_get_fd (nh);
GNUNET_NETWORK_socket_free_memory_only_ (nh);
return fd;
}
/** /**
* The main function of the taler-exchange-httpd server ("the exchange"). * The main function of the taler-exchange-httpd server ("the exchange").
* *
@ -729,6 +933,9 @@ main (int argc,
"force HTTP connections to be closed after each request", 0, "force HTTP connections to be closed after each request", 0,
&GNUNET_GETOPT_set_one, &TMH_exchange_connection_close}, &GNUNET_GETOPT_set_one, &TMH_exchange_connection_close},
GNUNET_GETOPT_OPTION_CFG_FILE (&cfgfile), GNUNET_GETOPT_OPTION_CFG_FILE (&cfgfile),
{'D', "disable-admin", NULL,
"do not run the /admin-HTTP server", 0,
&GNUNET_GETOPT_set_one, &no_admin},
{'t', "timeout", "SECONDS", {'t', "timeout", "SECONDS",
"after how long do connections timeout by default (in seconds)", 1, "after how long do connections timeout by default (in seconds)", 1,
&GNUNET_GETOPT_set_uint, &connection_timeout}, &GNUNET_GETOPT_set_uint, &connection_timeout},
@ -745,6 +952,7 @@ main (int argc,
const char *listen_pid; const char *listen_pid;
const char *listen_fds; const char *listen_fds;
int fh = -1; int fh = -1;
int fh_admin = -1;
GNUNET_assert (GNUNET_OK == GNUNET_assert (GNUNET_OK ==
GNUNET_log_setup ("taler-exchange-httpd", GNUNET_log_setup ("taler-exchange-httpd",
@ -778,7 +986,8 @@ main (int argc,
if ( (NULL != listen_pid) && if ( (NULL != listen_pid) &&
(NULL != listen_fds) && (NULL != listen_fds) &&
(getpid() == strtol (listen_pid, NULL, 10)) && (getpid() == strtol (listen_pid, NULL, 10)) &&
(1 == strtoul (listen_fds, NULL, 10)) /* we support only 1 socket */) ( (1 == strtoul (listen_fds, NULL, 10)) ||
(2 == strtoul (listen_fds, NULL, 10)) ) )
{ {
int flags; int flags;
@ -794,79 +1003,48 @@ main (int argc,
if (0 != fcntl (fh, F_SETFD, flags)) if (0 != fcntl (fh, F_SETFD, flags))
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
"fcntl"); "fcntl");
if (2 == strtoul (listen_fds, NULL, 10))
{
fh_admin = 4;
flags = fcntl (fh_admin, F_GETFD);
if ( (-1 == flags) && (EBADF == errno) )
{
fprintf (stderr,
"Bad listen socket passed, ignored\n");
fh_admin = -1;
}
flags |= FD_CLOEXEC;
if (0 != fcntl (fh_admin, F_SETFD, flags))
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
"fcntl");
}
} }
/* consider unix path */ /* consider unix path */
if ( (-1 == fh) && if ( (-1 == fh) &&
(NULL != serve_unixpath) ) (NULL != serve_unixpath) )
{ {
struct GNUNET_NETWORK_Handle *nh; fh = open_unix_path (serve_unixpath,
struct sockaddr_un *un;
if (sizeof (un->sun_path) <= strlen (serve_unixpath))
{
fprintf (stderr, "unixpath too long\n");
return 1;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Creating listen socket '%s' with mode %o\n",
serve_unixpath,
unixpath_mode); unixpath_mode);
if (-1 == fh)
if (GNUNET_OK !=
GNUNET_DISK_directory_create_for_file (serve_unixpath))
{
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
"mkdir",
serve_unixpath);
}
un = GNUNET_new (struct sockaddr_un);
un->sun_family = AF_UNIX;
strncpy (un->sun_path,
serve_unixpath,
sizeof (un->sun_path) - 1);
GNUNET_NETWORK_unix_precheck (un);
if (NULL == (nh = GNUNET_NETWORK_socket_create (AF_UNIX, SOCK_STREAM, 0)))
{
fprintf (stderr,
"create failed for AF_UNIX\n");
return 1; return 1;
} }
if (GNUNET_OK != GNUNET_NETWORK_socket_bind (nh, (void *) un, sizeof (struct sockaddr_un))) if ( (-1 == fh_admin) &&
(0 == no_admin) &&
(NULL != serve_admin_unixpath) )
{ {
fprintf (stderr, fh_admin = open_unix_path (serve_admin_unixpath,
"bind failed for AF_UNIX\n"); unixpath_admin_mode);
if (-1 == fh_admin)
{
GNUNET_break (0 == close (fh));
return 1; return 1;
} }
if (GNUNET_OK != GNUNET_NETWORK_socket_listen (nh, UNIX_BACKLOG))
{
fprintf (stderr,
"listen failed for AF_UNIX\n");
return 1;
} }
fh = GNUNET_NETWORK_get_fd (nh); mhd
= MHD_start_daemon (MHD_USE_SELECT_INTERNALLY | MHD_USE_PIPE_FOR_SHUTDOWN | MHD_USE_DEBUG,
if (0 != chmod (serve_unixpath, unixpath_mode))
{
fprintf (stderr,
"chmod failed: %s\n",
strerror (errno));
return 1;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"set socket '%s' to mode %o\n",
serve_unixpath,
unixpath_mode);
GNUNET_NETWORK_socket_free_memory_only_ (nh);
}
mydaemon = MHD_start_daemon (MHD_USE_SELECT_INTERNALLY | MHD_USE_PIPE_FOR_SHUTDOWN | MHD_USE_DEBUG,
(-1 == fh) ? serve_port : 0, (-1 == fh) ? serve_port : 0,
NULL, NULL, NULL, NULL,
&handle_mhd_request, NULL, &handle_mhd_request, NULL,
@ -878,13 +1056,37 @@ main (int argc,
MHD_OPTION_NOTIFY_CONNECTION, &connection_done, NULL, MHD_OPTION_NOTIFY_CONNECTION, &connection_done, NULL,
#endif #endif
MHD_OPTION_END); MHD_OPTION_END);
if (NULL == mhd)
if (NULL == mydaemon)
{ {
fprintf (stderr, fprintf (stderr,
"Failed to start HTTP server.\n"); "Failed to start HTTP server.\n");
return 1; return 1;
} }
if (0 == no_admin)
{
mhd_admin
= MHD_start_daemon (MHD_USE_SELECT_INTERNALLY | MHD_USE_PIPE_FOR_SHUTDOWN | MHD_USE_DEBUG,
(-1 == fh) ? serve_admin_port : 0,
NULL, NULL,
&handle_mhd_admin_request, NULL,
MHD_OPTION_LISTEN_SOCKET, fh_admin,
MHD_OPTION_EXTERNAL_LOGGER, &handle_mhd_logs, NULL,
MHD_OPTION_NOTIFY_COMPLETED, &handle_mhd_completion_callback, NULL,
MHD_OPTION_CONNECTION_TIMEOUT, connection_timeout,
#if HAVE_DEVELOPER
MHD_OPTION_NOTIFY_CONNECTION, &connection_done, NULL,
#endif
MHD_OPTION_END);
if (NULL == mhd_admin)
{
fprintf (stderr,
"Failed to start administrative HTTP server.\n");
MHD_stop_daemon (mhd);
return 1;
}
}
#if HAVE_DEVELOPER #if HAVE_DEVELOPER
if (NULL != input_filename) if (NULL != input_filename)
{ {
@ -905,15 +1107,20 @@ main (int argc,
{ {
case GNUNET_OK: case GNUNET_OK:
case GNUNET_SYSERR: case GNUNET_SYSERR:
MHD_stop_daemon (mydaemon); MHD_stop_daemon (mhd);
if (NULL != mhd_admin)
MHD_stop_daemon (mhd_admin);
break; break;
case GNUNET_NO: case GNUNET_NO:
{ {
MHD_socket sock = MHD_quiesce_daemon (mydaemon); MHD_socket sock = MHD_quiesce_daemon (mhd);
MHD_socket admin_sock;
pid_t chld; pid_t chld;
int flags; int flags;
/* Set flags to make 'sock' inherited by child */ /* Set flags to make 'sock' inherited by child */
if (NULL != mhd_admin)
admin_sock = MHD_quiesce_daemon (mhd_admin);
flags = fcntl (sock, F_GETFD); flags = fcntl (sock, F_GETFD);
GNUNET_assert (-1 != flags); GNUNET_assert (-1 != flags);
flags &= ~FD_CLOEXEC; flags &= ~FD_CLOEXEC;
@ -937,13 +1144,20 @@ main (int argc,
"dup2"); "dup2");
_exit (1); _exit (1);
} }
if ( (NULL != mhd_admin) &&
(4 != dup2 (admin_sock, 4)) )
{
GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR,
"dup2");
_exit (1);
}
/* Tell the child that it is the desired recipient for FD #3 */ /* Tell the child that it is the desired recipient for FD #3 */
GNUNET_snprintf (pids, GNUNET_snprintf (pids,
sizeof (pids), sizeof (pids),
"%u", "%u",
getpid ()); getpid ());
setenv ("LISTEN_PID", pids, 1); setenv ("LISTEN_PID", pids, 1);
setenv ("LISTEN_FDS", "1", 1); setenv ("LISTEN_FDS", (NULL != mhd_admin) ? "2" : "1", 1);
/* Finally, exec the (presumably) more recent exchange binary */ /* Finally, exec the (presumably) more recent exchange binary */
execvp ("taler-exchange-httpd", execvp ("taler-exchange-httpd",
argv); argv);
@ -955,16 +1169,25 @@ main (int argc,
before exiting; as the listen socket is no longer used, before exiting; as the listen socket is no longer used,
close it here */ close it here */
GNUNET_break (0 == close (sock)); GNUNET_break (0 == close (sock));
while (0 != MHD_get_daemon_info (mydaemon, if (NULL != mhd_admin)
MHD_DAEMON_INFO_CURRENT_CONNECTIONS)->num_connections) GNUNET_break (0 == close (admin_sock));
while ( (0 != MHD_get_daemon_info (mhd,
MHD_DAEMON_INFO_CURRENT_CONNECTIONS)->num_connections) ||
( (NULL != mhd_admin) &&
(0 != MHD_get_daemon_info (mhd_admin,
MHD_DAEMON_INFO_CURRENT_CONNECTIONS)->num_connections) ) )
sleep (1); sleep (1);
/* Now we're really done, practice clean shutdown */ /* Now we're really done, practice clean shutdown */
MHD_stop_daemon (mydaemon); MHD_stop_daemon (mhd);
if (NULL != mhd_admin)
MHD_stop_daemon (mhd_admin);
} }
break; break;
default: default:
GNUNET_break (0); GNUNET_break (0);
MHD_stop_daemon (mydaemon); MHD_stop_daemon (mhd);
if (NULL != mhd_admin)
MHD_stop_daemon (mhd_admin);
break; break;
} }
TALER_EXCHANGEDB_plugin_unload (TMH_plugin); TALER_EXCHANGEDB_plugin_unload (TMH_plugin);

1
src/include/Makefile.am
View File

@ -15,6 +15,7 @@ talerinclude_HEADERS = \
taler_amount_lib.h \ taler_amount_lib.h \
taler_bank_service.h \ taler_bank_service.h \
taler_crypto_lib.h \ taler_crypto_lib.h \
taler_error_codes.h \
taler_exchange_service.h \ taler_exchange_service.h \
taler_exchangedb_lib.h \ taler_exchangedb_lib.h \
taler_exchangedb_plugin.h \ taler_exchangedb_plugin.h \

45
src/include/taler_error_codes.h Normal file
View File

@ -0,0 +1,45 @@
/*
This file is part of TALER
Copyright (C) 2016 Inria
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 taler_error_codes.h
* @brief error codes returned by GNU Taler
*
* This file should defines constants for error codes returned
* in Taler APIs. We use codes above 1000 to avoid any
* confusing with HTTP status codes. All constants have the
* shared prefix "TALER_EC_" to indicate that they are error
* codes.
*/
#ifndef TALER_ERROR_CODES_H
#define TALER_ERROR_CODES_H
/**
* Enumeration with all possible Taler error codes.
*/
enum TALER_ErrorCode
{
/**
* Special code to indicate no error.
*/
TALER_EC_NONE = 0
};
#endif

2
src/include/taler_exchange_service.h
View File

@ -1059,6 +1059,7 @@ typedef void
* to the operators of the exchange. * to the operators of the exchange.
* *
* @param exchange the exchange handle; the exchange must be ready to operate * @param exchange the exchange handle; the exchange must be ready to operate
* @param admin_url URL of the administrative interface of the exchange
* @param reserve_pub public key of the reserve * @param reserve_pub public key of the reserve
* @param amount amount that was deposited * @param amount amount that was deposited
* @param execution_date when did we receive the amount * @param execution_date when did we receive the amount
@ -1074,6 +1075,7 @@ typedef void
*/ */
struct TALER_EXCHANGE_AdminAddIncomingHandle * struct TALER_EXCHANGE_AdminAddIncomingHandle *
TALER_EXCHANGE_admin_add_incoming (struct TALER_EXCHANGE_Handle *exchange, TALER_EXCHANGE_admin_add_incoming (struct TALER_EXCHANGE_Handle *exchange,
const char *admin_url,
const struct TALER_ReservePublicKeyP *reserve_pub, const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_Amount *amount, const struct TALER_Amount *amount,
struct GNUNET_TIME_Absolute execution_date, struct GNUNET_TIME_Absolute execution_date,

1
src/include/taler_signatures.h
View File

@ -24,7 +24,6 @@
* to know to implement Taler clients (wallets or merchants or * to know to implement Taler clients (wallets or merchants or
* auditor) that need to produce or verify Taler signatures. * auditor) that need to produce or verify Taler signatures.
*/ */
#ifndef TALER_SIGNATURES_H #ifndef TALER_SIGNATURES_H
#define TALER_SIGNATURES_H #define TALER_SIGNATURES_H