renaming mint->exchange

1 files changed, 163 insertions, 0 deletions

diff --git a/src/exchange/taler-exchange-httpd_keystate.h b/src/exchange/taler-exchange-httpd_keystate.h
new file mode 100644
index 000000000..56151a878
--- /dev/null
+++ b/src/exchange/taler-exchange-httpd_keystate.h
@@ -0,0 +1,163 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2014, 2015 GNUnet e.V.
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU Affero 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 Affero General Public License for more details.
+
+  You should have received a copy of the GNU Affero General Public License along with
+  TALER; see the file COPYING.  If not, If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file exchange/taler-exchange-httpd_keystate.h
+ * @brief management of our private signing keys (denomination keys)
+ * @author Florian Dold
+ * @author Benedikt Mueller
+ * @author Christian Grothoff
+ */
+#ifndef TALER_EXCHANGE_HTTPD_KEYSTATE_H
+#define TALER_EXCHANGE_HTTPD_KEYSTATE_H
+
+#include <gnunet/gnunet_util_lib.h>
+#include <microhttpd.h>
+#include "taler-exchange-httpd.h"
+#include "taler_exchangedb_lib.h"
+
+
+/**
+ * Snapshot of the (coin and signing)
+ * keys (including private keys) of the exchange.
+ */
+struct TMH_KS_StateHandle;
+
+
+/**
+ * Acquire the key state of the exchange.  Updates keys if necessary.
+ * For every call to #TMH_KS_acquire(), a matching call
+ * to #TMH_KS_release() must be made.
+ *
+ * @param location name of the function in which the lock is acquired
+ * @return the key state
+ */
+struct TMH_KS_StateHandle *
+TMH_KS_acquire_ (const char *location);
+
+
+/**
+ * Release key state, free if necessary (if reference count gets to zero).
+ *
+ * @param location name of the function in which the lock is acquired
+ * @param key_state the key state to release
+ */
+void
+TMH_KS_release_ (const char *location,
+                 struct TMH_KS_StateHandle *key_state);
+
+
+/**
+ * Acquire the key state of the exchange.  Updates keys if necessary.
+ * For every call to #TMH_KS_acquire(), a matching call
+ * to #TMH_KS_release() must be made.
+ *
+ * @return the key state
+ */
+#define TMH_KS_acquire(void) TMH_KS_acquire_(__FUNCTION__)
+
+
+/**
+ * Release key state, free if necessary (if reference count gets to zero).
+ *
+ * @param key_state the key state to release
+ */
+#define TMH_KS_release(key_state) TMH_KS_release_ (__FUNCTION__, key_state)
+
+
+/**
+ * Denomination key lookups can be for signing of fresh coins
+ * or to validate signatures on existing coins.  As the validity
+ * periods for a key differ, the caller must specify which
+ * use is relevant for the current operation.
+ */
+enum TMH_KS_DenominationKeyUse {
+
+  /**
+   * The key is to be used for a /reserve/withdraw or /refresh (exchange)
+   * operation.
+   */
+  TMH_KS_DKU_WITHDRAW,
+
+  /**
+   * The key is to be usd for a /deposit or /refresh (melt) operation.
+   */
+  TMH_KS_DKU_DEPOSIT
+
+};
+
+
+/**
+ * Look up the issue for a denom public key.  Note that the result
+ * is only valid while the @a key_state is not released!
+ *
+ * @param key_state state to look in
+ * @param denom_pub denomination public key
+ * @param use purpose for which the key is being located
+ * @return the denomination key issue,
+ *         or NULL if denom_pub could not be found (or is not valid at this time for the given @a use)
+ */
+struct TALER_EXCHANGEDB_DenominationKeyIssueInformation *
+TMH_KS_denomination_key_lookup (const struct TMH_KS_StateHandle *key_state,
+                                const struct TALER_DenominationPublicKey *denom_pub,
+				enum TMH_KS_DenominationKeyUse use);
+
+
+/**
+ * Read signals from a pipe in a loop, and reload keys from disk if
+ * SIGUSR1 is received, terminate if SIGTERM/SIGINT is received, and
+ * restart if SIGHUP is received.
+ *
+ * @return #GNUNET_SYSERR on errors,
+ *         #GNUNET_OK to terminate normally
+ *         #GNUNET_NO to restart an update version of the binary
+ */
+int
+TMH_KS_loop (void);
+
+
+/**
+ * Sign the message in @a purpose with the exchange's signing
+ * key.
+ *
+ * @param purpose the message to sign
+ * @param[out] pub set to the current public signing key of the exchange
+ * @param[out] sig signature over purpose using current signing key
+ */
+void
+TMH_KS_sign (const struct GNUNET_CRYPTO_EccSignaturePurpose *purpose,
+             struct TALER_ExchangePublicKeyP *pub,
+             struct TALER_ExchangeSignatureP *sig);
+
+
+/**
+ * Handle a "/keys" request
+ *
+ * @param rh context of the handler
+ * @param connection the MHD connection to handle
+ * @param[in,out] connection_cls the connection's closure (can be updated)
+ * @param upload_data upload data
+ * @param[in,out] upload_data_size number of bytes (left) in @a upload_data
+ * @return MHD result code
+  */
+int
+TMH_KS_handler_keys (struct TMH_RequestHandler *rh,
+                     struct MHD_Connection *connection,
+                     void **connection_cls,
+                     const char *upload_data,
+                     size_t *upload_data_size);
+
+
+#endif