renaming mint->exchange

1 files changed, 231 insertions, 0 deletions

diff --git a/src/exchange/taler-exchange-httpd_validation.c b/src/exchange/taler-exchange-httpd_validation.c
new file mode 100644
index 000000000..9132e3e02
--- /dev/null
+++ b/src/exchange/taler-exchange-httpd_validation.c
@@ -0,0 +1,231 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2016 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 taler-exchange-httpd_validation.c
+ * @brief helpers for calling the wire plugins to validate addresses
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <gnunet/gnunet_util_lib.h>
+#include "taler-exchange-httpd_validation.h"
+#include "taler_wire_plugin.h"
+
+
+/**
+ * Information we keep for each plugin.
+ */
+struct Plugin
+{
+
+  /**
+   * We keep plugins in a DLL.
+   */
+  struct Plugin *next;
+
+  /**
+   * We keep plugins in a DLL.
+   */
+  struct Plugin *prev;
+
+  /**
+   * Type of the wireformat.
+   */
+  char *type;
+
+  /**
+   * Pointer to the plugin.
+   */
+  struct TALER_WIRE_Plugin *plugin;
+
+};
+
+/**
+ * Head of DLL of wire plugins.
+ */
+static struct Plugin *wire_head;
+
+/**
+ * Tail of DLL of wire plugins.
+ */
+static struct Plugin *wire_tail;
+
+
+/**
+ * Initialize validation subsystem.
+ *
+ * @param cfg configuration to use
+ * @return #GNUNET_OK on success
+ */
+int
+TMH_VALIDATION_init (const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+  struct Plugin *p;
+  char *wireformats;
+  char *lib_name;
+  const char *token;
+
+  /* Find out list of supported wire formats */
+  if (GNUNET_OK !=
+      GNUNET_CONFIGURATION_get_value_string (cfg,
+                                             "exchange",
+                                             "wireformat",
+                                             &wireformats))
+  {
+    GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+                               "exchange",
+                               "wireformat");
+    return GNUNET_SYSERR;
+  }
+  for (token = strtok (wireformats,
+                       " ");
+       NULL != token;
+       token = strtok (NULL,
+                       " "))
+  {
+    (void) GNUNET_asprintf (&lib_name,
+                            "libtaler_plugin_wire_%s",
+                            token);
+    p = GNUNET_new (struct Plugin);
+    p->type = GNUNET_strdup (token);
+    p->plugin = GNUNET_PLUGIN_load (lib_name,
+                                    (void *) cfg);
+    if (NULL == p->plugin)
+    {
+      GNUNET_free (p);
+      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                  "Failed to load plugin %s\n",
+                  lib_name);
+      GNUNET_free (lib_name);
+      TMH_VALIDATION_done ();
+      return GNUNET_SYSERR;
+    }
+    p->plugin->library_name = lib_name;
+    GNUNET_CONTAINER_DLL_insert (wire_head,
+                                 wire_tail,
+                                 p);
+  }
+  GNUNET_free (wireformats);
+  return GNUNET_OK;
+}
+
+
+/**
+ * Shutdown validation subsystem.
+ */
+void
+TMH_VALIDATION_done ()
+{
+  struct Plugin *p;
+  char *lib_name;
+
+  while (NULL != (p = wire_head))
+  {
+    GNUNET_CONTAINER_DLL_remove (wire_head,
+                                 wire_tail,
+                                 p);
+    lib_name = p->plugin->library_name;
+    GNUNET_assert (NULL == GNUNET_PLUGIN_unload (lib_name,
+                                                 p->plugin));
+    GNUNET_free (lib_name);
+    GNUNET_free (p->type);
+    GNUNET_free (p);
+  }
+}
+
+
+/**
+ * Check if the given wire format JSON object is correctly formatted as
+ * a wire address.
+ *
+ * @param wire the JSON wire format object
+ * @return #GNUNET_YES if correctly formatted; #GNUNET_NO if not
+ */
+int
+TMH_json_validate_wireformat (const json_t *wire)
+{
+  const char *stype;
+  json_error_t error;
+  struct Plugin *p;
+
+  if (0 != json_unpack_ex ((json_t *) wire,
+                           &error, 0,
+                           "{s:s}",
+                           "type", &stype))
+  {
+    GNUNET_break (0);
+    return GNUNET_SYSERR;
+  }
+  for (p=wire_head; NULL != p; p = p->next)
+    if (0 == strcasecmp (p->type,
+                         stype))
+      return p->plugin->wire_validate (wire);
+  return GNUNET_NO;
+}
+
+
+/**
+ * Check if we support the given wire method.
+ *
+ * @param type type of wire method to check
+ * @return #GNUNET_YES if the method is supported
+ */
+int
+TMH_VALIDATION_test_method (const char *type)
+{
+  struct Plugin *p;
+
+  for (p=wire_head;NULL != p;p = p->next)
+    if (0 == strcasecmp (type,
+                         p->type))
+      return GNUNET_YES;
+  return GNUNET_NO;
+}
+
+
+/**
+ * Obtain supported validation methods as a JSON array,
+ * and as a hash.
+ *
+ * @param[out] h set to the hash of the JSON methods
+ * @return JSON array with the supported validation methods
+ */
+json_t *
+TMH_VALIDATION_get_methods (struct GNUNET_HashCode *h)
+{
+  json_t *methods;
+  struct GNUNET_HashContext *hc;
+  const char *wf;
+  struct Plugin *p;
+
+  methods = json_array ();
+  hc = GNUNET_CRYPTO_hash_context_start ();
+  for (p=wire_head;NULL != p;p = p->next)
+  {
+    wf = p->type;
+    json_array_append_new (methods,
+                           json_string (wf));
+    GNUNET_CRYPTO_hash_context_read (hc,
+                                     wf,
+                                     strlen (wf) + 1);
+  }
+  GNUNET_CRYPTO_hash_context_finish (hc,
+                                     h);
+  return methods;
+}
+
+
+/* end of taler-exchange-httpd_validation.c */