368 lines
11 KiB
C
368 lines
11 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2014 GNUnet e.V.
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU Affero General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License along with
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TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file taler-mint-httpd.c
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* @brief Serve the HTTP interface of the mint
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* @author Florian Dold
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* @author Benedikt Mueller
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* @author Christian Grothoff
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*/
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#include "platform.h"
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#include <gnunet/gnunet_util_lib.h>
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#include <jansson.h>
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#include <microhttpd.h>
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#include <libpq-fe.h>
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#include <pthread.h>
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#include "taler_signatures.h"
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#include "taler_util.h"
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#include "taler-mint-httpd_parsing.h"
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#include "taler-mint-httpd_mhd.h"
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#include "taler-mint-httpd_deposit.h"
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#include "taler-mint-httpd_withdraw.h"
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#include "taler-mint-httpd_refresh.h"
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#include "taler-mint-httpd_keystate.h"
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#include "mint_db.h"
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/**
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* Base directory of the mint (global)
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*/
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char *mintdir;
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/**
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* The mint's configuration (global)
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*/
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struct GNUNET_CONFIGURATION_Handle *cfg;
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/**
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* Master public key (according to the
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* configuration in the mint directory).
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*/
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struct GNUNET_CRYPTO_EddsaPublicKey master_pub;
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/**
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* In which format does this MINT expect wiring instructions?
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*/
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char *expected_wire_format = "sepa";
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/**
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* The HTTP Daemon.
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*/
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static struct MHD_Daemon *mydaemon;
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/**
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* The kappa value for refreshing.
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*/
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static unsigned int refresh_security_parameter;
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/**
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* Port to run the daemon on.
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*/
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static uint16_t serve_port;
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/**
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* Function called whenever MHD is done with a request. If the
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* request was a POST, we may have stored a `struct Buffer *` in the
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* @a con_cls that might still need to be cleaned up. Call the
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* respective function to free the memory.
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*
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* @param cls client-defined closure
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* @param connection connection handle
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* @param con_cls value as set by the last call to
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* the #MHD_AccessHandlerCallback
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* @param toe reason for request termination
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* @see #MHD_OPTION_NOTIFY_COMPLETED
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* @ingroup request
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*/
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static void
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handle_mhd_completion_callback (void *cls,
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struct MHD_Connection *connection,
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void **con_cls,
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enum MHD_RequestTerminationCode toe)
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{
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if (NULL == *con_cls)
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return;
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TALER_MINT_parse_post_cleanup_callback (*con_cls);
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*con_cls = NULL;
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}
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/**
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* Handle a request coming from libmicrohttpd.
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*
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* @param cls closure for MHD daemon (unused)
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* @param connection the connection
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* @param url the requested url
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* @param method the method (POST, GET, ...)
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* @param upload_data request data
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* @param upload_data_size size of @a upload_data in bytes
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* @param con_cls closure for request (a `struct Buffer *`)
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* @return MHD result code
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*/
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static int
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handle_mhd_request (void *cls,
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struct MHD_Connection *connection,
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const char *url,
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const char *method,
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const char *version,
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const char *upload_data,
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size_t *upload_data_size,
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void **con_cls)
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{
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static struct RequestHandler handlers[] =
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{
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{ "/", MHD_HTTP_METHOD_GET, "text/plain",
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"Hello, I'm the mint\n", 0,
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&TALER_MINT_handler_static_response, MHD_HTTP_OK },
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{ "/agpl", MHD_HTTP_METHOD_GET, "text/plain",
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NULL, 0,
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&TALER_MINT_handler_agpl_redirect, MHD_HTTP_FOUND },
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{ "/keys", MHD_HTTP_METHOD_GET, "application/json",
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NULL, 0,
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&TALER_MINT_handler_keys, MHD_HTTP_OK },
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{ "/keys", NULL, "text/plain",
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"Only GET is allowed", 0,
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&TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
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{ "/withdraw/status", MHD_HTTP_METHOD_GET, "application/json",
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NULL, 0,
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&TALER_MINT_handler_withdraw_status, MHD_HTTP_OK },
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{ "/withdraw/status", NULL, "text/plain",
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"Only GET is allowed", 0,
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&TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
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{ "/withdraw/sign", MHD_HTTP_METHOD_GET, "application/json",
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NULL, 0,
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&TALER_MINT_handler_withdraw_sign, MHD_HTTP_OK },
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{ "/withdraw/sign", NULL, "text/plain",
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"Only GET is allowed", 0,
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&TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
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{ "/refresh/melt", MHD_HTTP_METHOD_POST, "application/json",
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NULL, 0,
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&TALER_MINT_handler_refresh_melt, MHD_HTTP_OK },
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{ "/refresh/melt", NULL, "text/plain",
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"Only POST is allowed", 0,
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&TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
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{ "/refresh/reveal", MHD_HTTP_METHOD_POST, "application/json",
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NULL, 0,
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&TALER_MINT_handler_refresh_melt, MHD_HTTP_OK },
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{ "/refresh/reveal", NULL, "text/plain",
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"Only POST is allowed", 0,
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&TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
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{ "/refresh/link", MHD_HTTP_METHOD_GET, "application/json",
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NULL, 0,
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&TALER_MINT_handler_refresh_link, MHD_HTTP_OK },
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{ "/refresh/link", NULL, "text/plain",
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"Only GET is allowed", 0,
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&TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
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{ "/refresh/reveal", MHD_HTTP_METHOD_GET, "application/json",
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NULL, 0,
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&TALER_MINT_handler_refresh_reveal, MHD_HTTP_OK },
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{ "/refresh/reveal", NULL, "text/plain",
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"Only GET is allowed", 0,
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&TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
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{ "/deposit", MHD_HTTP_METHOD_POST, "application/json",
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NULL, 0,
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&TALER_MINT_handler_deposit, MHD_HTTP_OK },
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{ "/deposit", NULL, "text/plain",
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"Only POST is allowed", 0,
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&TALER_MINT_handler_send_json_pack_error, MHD_HTTP_METHOD_NOT_ALLOWED },
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{ NULL, NULL, NULL, NULL, 0, 0 }
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};
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static struct RequestHandler h404 =
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{
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"", NULL, "text/html",
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"<html><title>404: not found</title></html>", 0,
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&TALER_MINT_handler_static_response, MHD_HTTP_NOT_FOUND
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};
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struct RequestHandler *rh;
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unsigned int i;
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GNUNET_log (GNUNET_ERROR_TYPE_INFO,
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"Handling request for URL '%s'\n",
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url);
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for (i=0;NULL != handlers[i].url;i++)
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{
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rh = &handlers[i];
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if ( (0 == strcasecmp (url,
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rh->url)) &&
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( (NULL == rh->method) ||
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(0 == strcasecmp (method,
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rh->method)) ) )
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return rh->handler (rh,
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connection,
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con_cls,
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upload_data,
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upload_data_size);
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}
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return TALER_MINT_handler_static_response (&h404,
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connection,
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con_cls,
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upload_data,
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upload_data_size);
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}
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/**
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* Load configuration parameters for the mint
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* server into the corresponding global variables.
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*
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* @param param mint_directory the mint's directory
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* @return #GNUNET_OK on success
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*/
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static int
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mint_serve_process_config (const char *mint_directory)
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{
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unsigned long long port;
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unsigned long long kappa;
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char *master_pub_str;
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char *db_cfg;
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cfg = TALER_config_load (mint_directory);
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if (NULL == cfg)
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{
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fprintf (stderr,
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"can't load mint configuration\n");
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return 1;
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}
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if (GNUNET_OK !=
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GNUNET_CONFIGURATION_get_value_string (cfg,
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"mint", "master_pub",
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&master_pub_str))
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{
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fprintf (stderr,
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"No master public key given in mint configuration.");
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return GNUNET_NO;
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}
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if (GNUNET_OK !=
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GNUNET_CRYPTO_eddsa_public_key_from_string (master_pub_str,
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strlen (master_pub_str),
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&master_pub))
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{
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fprintf (stderr,
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"Invalid master public key given in mint configuration.");
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GNUNET_free (master_pub_str);
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return GNUNET_NO;
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}
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GNUNET_free (master_pub_str);
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if (GNUNET_OK !=
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GNUNET_CONFIGURATION_get_value_string (cfg,
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"mint", "db",
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&db_cfg))
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{
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fprintf (stderr,
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"invalid configuration: mint.db\n");
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return GNUNET_NO;
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}
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if (GNUNET_OK !=
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TALER_MINT_DB_init (db_cfg))
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{
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fprintf (stderr,
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"failed to initialize DB subsystem\n");
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return GNUNET_NO;
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}
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if (GNUNET_OK !=
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GNUNET_CONFIGURATION_get_value_number (cfg,
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"mint", "port",
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&port))
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{
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fprintf (stderr,
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"invalid configuration: mint.port\n");
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return GNUNET_NO;
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}
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if ((port == 0) || (port > UINT16_MAX))
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{
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fprintf (stderr,
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"invalid configuration (value out of range): mint.port\n");
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return GNUNET_NO;
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}
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serve_port = port;
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if (GNUNET_OK !=
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GNUNET_CONFIGURATION_get_value_number (cfg,
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"mint", "refresh_security_parameter",
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&kappa))
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{
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fprintf (stderr,
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"invalid configuration: mint.refresh_security_parameter\n");
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return GNUNET_NO;
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}
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refresh_security_parameter = kappa;
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return GNUNET_OK;
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}
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/**
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* The main function of the serve tool
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*
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* @param argc number of arguments from the command line
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* @param argv command line arguments
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* @return 0 ok, 1 on error
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*/
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int
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main (int argc, char *const *argv)
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{
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static const struct GNUNET_GETOPT_CommandLineOption options[] = {
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GNUNET_GETOPT_OPTION_HELP ("gnunet-mint-keyup OPTIONS"),
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{'d', "mint-dir", "DIR",
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"mint directory", 1,
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&GNUNET_GETOPT_set_filename, &mintdir},
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GNUNET_GETOPT_OPTION_END
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};
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int ret;
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GNUNET_assert (GNUNET_OK ==
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GNUNET_log_setup ("taler-mint-serve",
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"INFO",
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NULL));
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if (GNUNET_GETOPT_run ("taler-mint-serve",
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options,
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argc, argv) < 0)
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return 1;
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if (NULL == mintdir)
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{
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fprintf (stderr,
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"no mint dir given\n");
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return 1;
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}
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if (GNUNET_OK != mint_serve_process_config (mintdir))
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return 1;
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mydaemon = MHD_start_daemon (MHD_USE_SELECT_INTERNALLY | MHD_USE_DEBUG,
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serve_port,
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NULL, NULL,
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&handle_mhd_request, NULL,
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MHD_OPTION_NOTIFY_COMPLETED, &handle_mhd_completion_callback,
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MHD_OPTION_END);
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if (NULL == mydaemon)
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{
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fprintf (stderr,
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"Failed to start MHD.\n");
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return 1;
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}
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ret = TALER_MINT_key_reload_loop ();
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MHD_stop_daemon (mydaemon);
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return (GNUNET_OK == ret) ? 0 : 1;
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}
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