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-rw-r--r--src/mint/taler-mint-httpd_validation.c231
1 files changed, 231 insertions, 0 deletions
diff --git a/src/mint/taler-mint-httpd_validation.c b/src/mint/taler-mint-httpd_validation.c
new file mode 100644
index 000000000..461e88759
--- /dev/null
+++ b/src/mint/taler-mint-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-mint-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-mint-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,
+ "mint",
+ "wireformat",
+ &wireformats))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ "mint",
+ "wireformat");
+ return GNUNET_SYSERR;
+ }
+ for (token = strtok (wireformats,
+ " ");
+ NULL != token;
+ token = strtok (NULL,
+ " "))
+ {
+ (void) GNUNET_asprintf (&lib_name,
+ "libtaler_plugin_wire_%s",
+ lib_name);
+ 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-mint-httpd_validation.c */