/*
This file is part of GNUnet.
Copyright (C) 2012-2015 GNUnet e.V.
GNUnet 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 of the License,
or (at your option) any later version.
GNUnet 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 this program. If not, see .
*/
/**
* @author Martin Schanzenbach
* @author Philippe Buschmann
* @file identity/plugin_rest_identity.c
* @brief GNUnet Identity REST plugin
*/
#include "platform.h"
#include "gnunet_rest_plugin.h"
#include "gnunet_identity_service.h"
#include "gnunet_rest_lib.h"
#include "microhttpd.h"
#include
/**
* Identity Namespace
*/
#define GNUNET_REST_API_NS_IDENTITY "/identity"
/**
* Identity Namespace with public key specifier
*/
#define GNUNET_REST_API_NS_IDENTITY_ALL "/identity/all"
/**
* Identity Namespace with public key specifier
*/
#define GNUNET_REST_API_NS_IDENTITY_PUBKEY "/identity/pubkey"
/**
* Identity Namespace with public key specifier
*/
#define GNUNET_REST_API_NS_IDENTITY_NAME "/identity/name"
/**
* Identity Subsystem Namespace
*/
#define GNUNET_REST_API_NS_IDENTITY_SUBSYSTEM "/identity/subsystem"
/**
* Parameter public key
*/
#define GNUNET_REST_IDENTITY_PARAM_PUBKEY "pubkey"
/**
* Parameter subsystem
*/
#define GNUNET_REST_IDENTITY_PARAM_SUBSYSTEM "subsystem"
/**
* Parameter name
*/
#define GNUNET_REST_IDENTITY_PARAM_NAME "name"
/**
* Parameter new name
*/
#define GNUNET_REST_IDENTITY_PARAM_NEWNAME "newname"
/**
* Error message Unknown Error
*/
#define GNUNET_REST_IDENTITY_ERROR_UNKNOWN "Unknown Error"
/**
* Error message No identity found
*/
#define GNUNET_REST_IDENTITY_NOT_FOUND "No identity found"
/**
* Error message Missing identity name
*/
#define GNUNET_REST_IDENTITY_MISSING_NAME "Missing identity name"
/**
* Error message Missing identity name
*/
#define GNUNET_REST_IDENTITY_MISSING_PUBKEY "Missing identity public key"
/**
* Error message No data
*/
#define GNUNET_REST_ERROR_NO_DATA "No data"
/**
* Error message Data invalid
*/
#define GNUNET_REST_ERROR_DATA_INVALID "Data invalid"
/**
* State while collecting all egos
*/
#define ID_REST_STATE_INIT 0
/**
* Done collecting egos
*/
#define ID_REST_STATE_POST_INIT 1
/**
* The configuration handle
*/
const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* HTTP methods allows for this plugin
*/
static char* allow_methods;
/**
* @brief struct returned by the initialization function of the plugin
*/
struct Plugin
{
const struct GNUNET_CONFIGURATION_Handle *cfg;
};
/**
* The ego list
*/
struct EgoEntry
{
/**
* DLL
*/
struct EgoEntry *next;
/**
* DLL
*/
struct EgoEntry *prev;
/**
* Ego Identifier
*/
char *identifier;
/**
* Public key string
*/
char *keystring;
/**
* The Ego
*/
struct GNUNET_IDENTITY_Ego *ego;
};
/**
* The request handle
*/
struct RequestHandle
{
/**
* The data from the REST request
*/
const char* data;
/**
* The name to look up
*/
char *name;
/**
* the length of the REST data
*/
size_t data_size;
/**
* Ego list
*/
struct EgoEntry *ego_head;
/**
* Ego list
*/
struct EgoEntry *ego_tail;
/**
* The processing state
*/
int state;
/**
* Handle to Identity service.
*/
struct GNUNET_IDENTITY_Handle *identity_handle;
/**
* IDENTITY Operation
*/
struct GNUNET_IDENTITY_Operation *op;
/**
* Rest connection
*/
struct GNUNET_REST_RequestHandle *rest_handle;
/**
* Desired timeout for the lookup (default is no timeout).
*/
struct GNUNET_TIME_Relative timeout;
/**
* ID of a task associated with the resolution process.
*/
struct GNUNET_SCHEDULER_Task *timeout_task;
/**
* The plugin result processor
*/
GNUNET_REST_ResultProcessor proc;
/**
* The closure of the result processor
*/
void *proc_cls;
/**
* The url
*/
char *url;
/**
* Error response message
*/
char *emsg;
/**
* Response code
*/
int response_code;
};
/**
* Cleanup lookup handle
* @param handle Handle to clean up
*/
static void
cleanup_handle (void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
struct EgoEntry *ego_tmp;
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Cleaning up\n");
if (NULL != handle->timeout_task)
{
GNUNET_SCHEDULER_cancel (handle->timeout_task);
handle->timeout_task = NULL;
}
if (NULL != handle->url)
GNUNET_free(handle->url);
if (NULL != handle->emsg)
GNUNET_free(handle->emsg);
if (NULL != handle->name)
GNUNET_free (handle->name);
if (NULL != handle->identity_handle)
GNUNET_IDENTITY_disconnect (handle->identity_handle);
for (ego_entry = handle->ego_head;
NULL != ego_entry;)
{
ego_tmp = ego_entry;
ego_entry = ego_entry->next;
GNUNET_free(ego_tmp->identifier);
GNUNET_free(ego_tmp->keystring);
GNUNET_free(ego_tmp);
}
GNUNET_free(handle);
}
/**
* Task run on errors. Reports an error and cleans up everything.
*
* @param cls the `struct RequestHandle`
*/
static void
do_error (void *cls)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
json_t *json_error = json_object();
char *response;
if (NULL == handle->emsg)
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_ERROR_UNKNOWN);
json_object_set_new(json_error,"error", json_string(handle->emsg));
if (0 == handle->response_code)
handle->response_code = MHD_HTTP_OK;
response = json_dumps (json_error, 0);
resp = GNUNET_REST_create_response (response);
handle->proc (handle->proc_cls, resp, handle->response_code);
json_decref(json_error);
GNUNET_free(response);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Get EgoEntry from list with either a public key or a name
* If public key and name are not NULL, it returns the public key result first
*
* @param handle the RequestHandle
* @param pubkey the public key of an identity (only one can be NULL)
* @param name the name of an identity (only one can be NULL)
* @return EgoEntry or NULL if not found
*/
struct EgoEntry*
get_egoentry(struct RequestHandle *handle, char* pubkey, char *name)
{
struct EgoEntry *ego_entry;
if (NULL != pubkey)
{
for (ego_entry = handle->ego_head;
NULL != ego_entry;
ego_entry = ego_entry->next)
{
if (0 != strcasecmp (pubkey, ego_entry->keystring))
continue;
return ego_entry;
}
}
if (NULL != name)
{
for (ego_entry = handle->ego_head;
NULL != ego_entry;
ego_entry = ego_entry->next)
{
if (0 != strcasecmp (name, ego_entry->identifier))
continue;
return ego_entry;
}
}
return NULL;
}
/**
* Callback for GET Request with subsystem
*
* @param cls the RequestHandle
* @param ego the Ego found
* @param ctx the context
* @param name the id of the ego
*/
static void
ego_get_for_subsystem (void *cls,
struct GNUNET_IDENTITY_Ego *ego,
void **ctx,
const char *name)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
struct GNUNET_CRYPTO_EcdsaPublicKey public_key;
json_t *json_root;
char *result_str;
char *public_key_string;
if(NULL == ego)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
GNUNET_IDENTITY_ego_get_public_key(ego,&public_key);
public_key_string = GNUNET_CRYPTO_ecdsa_public_key_to_string(&public_key);
// create json with subsystem identity
json_root = json_object ();
json_object_set_new (json_root,
GNUNET_REST_IDENTITY_PARAM_PUBKEY,
json_string(public_key_string));
json_object_set_new (json_root,
GNUNET_REST_IDENTITY_PARAM_NAME,
json_string(name));
result_str = json_dumps (json_root, 0);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Result %s\n", result_str);
resp = GNUNET_REST_create_response (result_str);
json_decref (json_root);
handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
GNUNET_free(result_str);
GNUNET_free(public_key_string);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Handle identity GET request for subsystem
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
ego_get_subsystem (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
char *subsystem;
if (strlen (GNUNET_REST_API_NS_IDENTITY_SUBSYSTEM) >= strlen (handle->url))
{
handle->emsg = GNUNET_strdup("Missing subsystem name");
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
subsystem = &handle->url[strlen (
GNUNET_REST_API_NS_IDENTITY_SUBSYSTEM) + 1];
//requested default identity of subsystem
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Looking for %s's ego\n", subsystem);
handle->op = GNUNET_IDENTITY_get (handle->identity_handle,
subsystem,
&ego_get_for_subsystem,
handle);
if (NULL == handle->op)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
}
/**
* Handle identity GET request - responds with all identities
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
ego_get_all (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
struct MHD_Response *resp;
json_t *json_root;
json_t *json_ego;
char *result_str;
json_root = json_array ();
//Return ego/egos
for (ego_entry = handle->ego_head;
NULL != ego_entry; ego_entry = ego_entry->next)
{
json_ego = json_object ();
json_object_set_new (json_ego,
GNUNET_REST_IDENTITY_PARAM_PUBKEY,
json_string (ego_entry->keystring));
json_object_set_new (json_ego,
GNUNET_REST_IDENTITY_PARAM_NAME,
json_string (ego_entry->identifier));
json_array_append (json_root, json_ego);
json_decref (json_ego);
}
if ((size_t) 0 == json_array_size (json_root))
{
json_decref (json_root);
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
result_str = json_dumps (json_root, 0);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Result %s\n", result_str);
resp = GNUNET_REST_create_response (result_str);
json_decref (json_root);
handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
GNUNET_free(result_str);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Responds with the ego_entry identity
*
* @param handle the struct RequestHandle
* @param ego_entry the struct EgoEntry for the response
*/
void
ego_get_response (struct RequestHandle *handle, struct EgoEntry *ego_entry)
{
struct MHD_Response *resp;
json_t *json_ego;
char *result_str;
json_ego = json_object ();
json_object_set_new (json_ego,
GNUNET_REST_IDENTITY_PARAM_PUBKEY,
json_string (ego_entry->keystring));
json_object_set_new (json_ego,
GNUNET_REST_IDENTITY_PARAM_NAME,
json_string (ego_entry->identifier));
result_str = json_dumps (json_ego, 0);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Result %s\n", result_str);
resp = GNUNET_REST_create_response (result_str);
handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
json_decref (json_ego);
GNUNET_free(result_str);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Handle identity GET request with a public key
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
ego_get_pubkey (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
char *keystring;
keystring = NULL;
if (strlen (GNUNET_REST_API_NS_IDENTITY_PUBKEY) >= strlen (handle->url))
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_MISSING_PUBKEY);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
keystring = &handle->url[strlen (GNUNET_REST_API_NS_IDENTITY_PUBKEY)+1];
ego_entry = get_egoentry(handle, keystring, NULL);
if (NULL == ego_entry)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
ego_get_response(handle, ego_entry);
}
/**
* Handle identity GET request with a name
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
ego_get_name (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
char *egoname;
egoname = NULL;
if (strlen (GNUNET_REST_API_NS_IDENTITY_NAME) >= strlen (handle->url))
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_MISSING_NAME);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
egoname = &handle->url[strlen (GNUNET_REST_API_NS_IDENTITY_NAME)+1];
ego_entry = get_egoentry(handle, NULL, egoname);
if (NULL == ego_entry)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
ego_get_response(handle, ego_entry);
}
/**
* Processing finished
*
* @param cls request handle
* @param emsg error message
*/
static void
do_finished (void *cls, const char *emsg)
{
struct RequestHandle *handle = cls;
struct MHD_Response *resp;
handle->op = NULL;
if (NULL != emsg)
{
handle->emsg = GNUNET_strdup(emsg);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
if (0 == handle->response_code)
{
handle->response_code = MHD_HTTP_NO_CONTENT;
}
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, handle->response_code);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
}
/**
* Processing edit ego with EgoEntry ego_entry
*
* @param handle the struct RequestHandle
* @param ego_entry the struct EgoEntry we want to edit
*/
void
ego_edit (struct RequestHandle *handle, struct EgoEntry *ego_entry)
{
struct EgoEntry *ego_entry_tmp;
struct MHD_Response *resp;
json_t *data_js;
json_error_t err;
char *newname;
char term_data[handle->data_size + 1];
int json_state;
//if no data
if (0 >= handle->data_size)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_NO_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
//if not json
term_data[handle->data_size] = '\0';
GNUNET_memcpy(term_data, handle->data, handle->data_size);
data_js = json_loads (term_data,JSON_DECODE_ANY,&err);
if (NULL == data_js)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_NO_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
newname = NULL;
//NEW NAME
json_state = 0;
json_state = json_unpack(data_js,
"{s:s!}",
GNUNET_REST_IDENTITY_PARAM_NEWNAME,
&newname);
//Change name with pubkey or name identifier
if (0 != json_state)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_DATA_INVALID);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
if (NULL == newname)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_DATA_INVALID);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
if (0 >= strlen (newname))
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_DATA_INVALID);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
ego_entry_tmp = get_egoentry (handle, NULL, newname);
if (NULL != ego_entry_tmp)
{
//Ego with same name not allowed (even if its the ego we change)
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, MHD_HTTP_CONFLICT);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
json_decref (data_js);
return;
}
handle->op = GNUNET_IDENTITY_rename (handle->identity_handle,
ego_entry->identifier,
newname,
&do_finished,
handle);
if (NULL == handle->op)
{
handle->emsg = GNUNET_strdup("Rename failed");
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
json_decref (data_js);
return;
}
/**
* Handle identity PUT request with public key
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
ego_edit_pubkey (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
char *keystring;
keystring = NULL;
if (strlen (GNUNET_REST_API_NS_IDENTITY_PUBKEY) >= strlen (handle->url))
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_MISSING_PUBKEY);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
keystring = &handle->url[strlen (GNUNET_REST_API_NS_IDENTITY_PUBKEY)+1];
ego_entry = get_egoentry(handle, keystring, NULL);
if (NULL == ego_entry)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
ego_edit(handle,ego_entry);
}
/**
* Handle identity PUT request with name
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
ego_edit_name (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
char *name;
name = NULL;
if (strlen (GNUNET_REST_API_NS_IDENTITY_NAME) >= strlen (handle->url))
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_MISSING_NAME);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
name = &handle->url[strlen (GNUNET_REST_API_NS_IDENTITY_NAME)+1];
ego_entry = get_egoentry(handle, NULL, name);
if (NULL == ego_entry)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
ego_edit(handle,ego_entry);
}
/**
* Handle identity subsystem PUT request with name
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
ego_edit_subsystem (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
json_t *data_js;
json_error_t err;
char *newsubsys;
char *name;
char term_data[handle->data_size + 1];
int json_state;
name = NULL;
if (strlen (GNUNET_REST_API_NS_IDENTITY_SUBSYSTEM) >= strlen (handle->url))
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_MISSING_NAME);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
name = &handle->url[strlen (GNUNET_REST_API_NS_IDENTITY_SUBSYSTEM)+1];
ego_entry = get_egoentry(handle, NULL, name);
if (NULL == ego_entry)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
//if no data
if (0 >= handle->data_size)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_NO_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
//if not json
term_data[handle->data_size] = '\0';
GNUNET_memcpy(term_data, handle->data, handle->data_size);
data_js = json_loads (term_data,JSON_DECODE_ANY,&err);
if (NULL == data_js)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_NO_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
newsubsys = NULL;
//SUBSYSTEM
json_state = 0;
json_state = json_unpack(data_js,
"{s:s!}",
GNUNET_REST_IDENTITY_PARAM_SUBSYSTEM,
&newsubsys);
//Change subsystem with pubkey or name identifier
if (0 != json_state)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_DATA_INVALID);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
if (NULL == newsubsys)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_DATA_INVALID);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
if (0 >= strlen (newsubsys))
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_DATA_INVALID);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
handle->response_code = MHD_HTTP_NO_CONTENT;
handle->op = GNUNET_IDENTITY_set (handle->identity_handle,
newsubsys,
ego_entry->ego,
&do_finished,
handle);
if (NULL == handle->op)
{
handle->emsg = GNUNET_strdup("Setting subsystem failed");
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
json_decref (data_js);
return;
}
/**
* Handle identity POST request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
ego_create (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
struct MHD_Response *resp;
json_t *data_js;
json_error_t err;
char* egoname;
int json_unpack_state;
char term_data[handle->data_size + 1];
if (strlen (GNUNET_REST_API_NS_IDENTITY) != strlen (handle->url))
{
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
if (0 >= handle->data_size)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_NO_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
term_data[handle->data_size] = '\0';
GNUNET_memcpy(term_data, handle->data, handle->data_size);
data_js = json_loads (term_data,
JSON_DECODE_ANY,
&err);
if (NULL == data_js)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_NO_DATA);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
json_unpack_state = 0;
json_unpack_state = json_unpack(data_js,
"{s:s!}",
GNUNET_REST_IDENTITY_PARAM_NAME,
&egoname);
if (0 != json_unpack_state)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_DATA_INVALID);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
if (NULL == egoname)
{
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_DATA_INVALID);
GNUNET_SCHEDULER_add_now (&do_error, handle);
json_decref (data_js);
return;
}
if (0 >= strlen (egoname))
{
json_decref (data_js);
handle->emsg = GNUNET_strdup(GNUNET_REST_ERROR_DATA_INVALID);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
GNUNET_STRINGS_utf8_tolower(egoname, egoname);
for (ego_entry = handle->ego_head;
NULL != ego_entry; ego_entry = ego_entry->next)
{
if (0 == strcasecmp (egoname, ego_entry->identifier))
{
resp = GNUNET_REST_create_response (NULL);
handle->proc (handle->proc_cls, resp, MHD_HTTP_CONFLICT);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
json_decref (data_js);
return;
}
}
handle->name = GNUNET_strdup(egoname);
json_decref (data_js);
handle->response_code = MHD_HTTP_CREATED;
handle->op = GNUNET_IDENTITY_create (handle->identity_handle, handle->name,
&do_finished, handle);
}
/**
* Handle identity DELETE request with public key
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
ego_delete_pubkey (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
char *keystring;
keystring = NULL;
if (strlen (GNUNET_REST_API_NS_IDENTITY_PUBKEY) >= strlen (handle->url))
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_MISSING_PUBKEY);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
keystring = &handle->url[strlen (GNUNET_REST_API_NS_IDENTITY_PUBKEY)+1];
ego_entry = get_egoentry(handle, keystring, NULL);
if (NULL == ego_entry)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->response_code = MHD_HTTP_NO_CONTENT;
handle->op = GNUNET_IDENTITY_delete (handle->identity_handle,
ego_entry->identifier,
&do_finished,
handle);
}
/**
* Handle identity DELETE request with name
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
void
ego_delete_name (struct GNUNET_REST_RequestHandle *con_handle,
const char* url,
void *cls)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
char *name;
name = NULL;
if (strlen (GNUNET_REST_API_NS_IDENTITY_NAME) >= strlen (handle->url))
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_MISSING_NAME);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
name = &handle->url[strlen (GNUNET_REST_API_NS_IDENTITY_NAME)+1];
ego_entry = get_egoentry(handle, NULL, name);
if (NULL == ego_entry)
{
handle->response_code = MHD_HTTP_NOT_FOUND;
handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
GNUNET_SCHEDULER_add_now (&do_error, handle);
return;
}
handle->response_code = MHD_HTTP_NO_CONTENT;
handle->op = GNUNET_IDENTITY_delete (handle->identity_handle,
ego_entry->identifier,
&do_finished,
handle);
}
/**
* Respond to OPTIONS request
*
* @param con_handle the connection handle
* @param url the url
* @param cls the RequestHandle
*/
static void
options_cont (struct GNUNET_REST_RequestHandle *con_handle, const char* url,
void *cls)
{
struct MHD_Response *resp;
struct RequestHandle *handle = cls;
//For now, independent of path return all options
resp = GNUNET_REST_create_response (NULL);
MHD_add_response_header (resp, "Access-Control-Allow-Methods", allow_methods);
handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
return;
}
/**
* Handle rest request
*
* @param handle the request handle
*/
static void
init_cont (struct RequestHandle *handle)
{
struct GNUNET_REST_RequestHandlerError err;
static const struct GNUNET_REST_RequestHandler handlers[] = {
{ MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_IDENTITY_ALL, &ego_get_all },
{ MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_IDENTITY_PUBKEY, &ego_get_pubkey },
{ MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_IDENTITY_NAME, &ego_get_name },
{ MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_IDENTITY_SUBSYSTEM, &ego_get_subsystem },
{ MHD_HTTP_METHOD_PUT, GNUNET_REST_API_NS_IDENTITY_PUBKEY, &ego_edit_pubkey },
{ MHD_HTTP_METHOD_PUT, GNUNET_REST_API_NS_IDENTITY_NAME, &ego_edit_name },
{ MHD_HTTP_METHOD_PUT, GNUNET_REST_API_NS_IDENTITY_SUBSYSTEM, &ego_edit_subsystem },
{ MHD_HTTP_METHOD_POST, GNUNET_REST_API_NS_IDENTITY, &ego_create },
{ MHD_HTTP_METHOD_DELETE, GNUNET_REST_API_NS_IDENTITY_PUBKEY, &ego_delete_pubkey },
{ MHD_HTTP_METHOD_DELETE, GNUNET_REST_API_NS_IDENTITY_NAME, &ego_delete_name },
{ MHD_HTTP_METHOD_OPTIONS, GNUNET_REST_API_NS_IDENTITY, &options_cont },
GNUNET_REST_HANDLER_END
};
if (GNUNET_NO
== GNUNET_REST_handle_request (handle->rest_handle, handlers, &err,
handle))
{
handle->response_code = err.error_code;
GNUNET_SCHEDULER_add_now (&do_error, handle);
}
}
/**
* If listing is enabled, prints information about the egos.
*
* This function is initially called for all egos and then again
* whenever a ego's identifier changes or if it is deleted. At the
* end of the initial pass over all egos, the function is once called
* with 'NULL' for 'ego'. That does NOT mean that the callback won't
* be invoked in the future or that there was an error.
*
* When used with 'GNUNET_IDENTITY_create' or 'GNUNET_IDENTITY_get',
* this function is only called ONCE, and 'NULL' being passed in
* 'ego' does indicate an error (i.e. name is taken or no default
* value is known). If 'ego' is non-NULL and if '*ctx'
* is set in those callbacks, the value WILL be passed to a subsequent
* call to the identity callback of 'GNUNET_IDENTITY_connect' (if
* that one was not NULL).
*
* When an identity is renamed, this function is called with the
* (known) ego but the NEW identifier.
*
* When an identity is deleted, this function is called with the
* (known) ego and "NULL" for the 'identifier'. In this case,
* the 'ego' is henceforth invalid (and the 'ctx' should also be
* cleaned up).
*
* @param cls closure
* @param ego ego handle
* @param ctx context for application to store data for this ego
* (during the lifetime of this process, initially NULL)
* @param identifier identifier assigned by the user for this ego,
* NULL if the user just deleted the ego and it
* must thus no longer be used
*/
static void
init_egos (void *cls, struct GNUNET_IDENTITY_Ego *ego, void **ctx,
const char *identifier)
{
struct RequestHandle *handle = cls;
struct EgoEntry *ego_entry;
struct GNUNET_CRYPTO_EcdsaPublicKey pk;
if ((NULL == ego) && (ID_REST_STATE_INIT == handle->state))
{
handle->state = ID_REST_STATE_POST_INIT;
init_cont (handle);
return;
}
if (ID_REST_STATE_INIT == handle->state)
{
ego_entry = GNUNET_new(struct EgoEntry);
GNUNET_IDENTITY_ego_get_public_key (ego, &pk);
ego_entry->keystring = GNUNET_CRYPTO_ecdsa_public_key_to_string (&pk);
ego_entry->ego = ego;
GNUNET_asprintf (&ego_entry->identifier, "%s", identifier);
GNUNET_CONTAINER_DLL_insert_tail(handle->ego_head, handle->ego_tail,
ego_entry);
}
}
/**
* Function processing the REST call
*
* @param method HTTP method
* @param url URL of the HTTP request
* @param data body of the HTTP request (optional)
* @param data_size length of the body
* @param proc callback function for the result
* @param proc_cls closure for callback function
* @return GNUNET_OK if request accepted
*/
static void
rest_process_request (struct GNUNET_REST_RequestHandle *rest_handle,
GNUNET_REST_ResultProcessor proc, void *proc_cls)
{
struct RequestHandle *handle = GNUNET_new(struct RequestHandle);
handle->response_code = 0;
handle->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
handle->proc_cls = proc_cls;
handle->proc = proc;
handle->rest_handle = rest_handle;
handle->data = rest_handle->data;
handle->data_size = rest_handle->data_size;
handle->url = GNUNET_strdup(rest_handle->url);
if (handle->url[strlen (handle->url) - 1] == '/')
handle->url[strlen (handle->url) - 1] = '\0';
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Connecting...\n");
handle->identity_handle = GNUNET_IDENTITY_connect (cfg, &init_egos, handle);
handle->timeout_task = GNUNET_SCHEDULER_add_delayed (handle->timeout,
&do_error, handle);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Connected\n");
}
/**
* Entry point for the plugin.
*
* @param cls Config info
* @return NULL on error, otherwise the plugin context
*/
void *
libgnunet_plugin_rest_identity_init (void *cls)
{
static struct Plugin plugin;
struct GNUNET_REST_Plugin *api;
cfg = cls;
if (NULL != plugin.cfg)
return NULL; /* can only initialize once! */
memset (&plugin, 0, sizeof(struct Plugin));
plugin.cfg = cfg;
api = GNUNET_new(struct GNUNET_REST_Plugin);
api->cls = &plugin;
api->name = GNUNET_REST_API_NS_IDENTITY;
api->process_request = &rest_process_request;
GNUNET_asprintf (&allow_methods, "%s, %s, %s, %s, %s",
MHD_HTTP_METHOD_GET,
MHD_HTTP_METHOD_POST,
MHD_HTTP_METHOD_PUT,
MHD_HTTP_METHOD_DELETE,
MHD_HTTP_METHOD_OPTIONS);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, _("Identity REST API initialized\n"));
return api;
}
/**
* Exit point from the plugin.
*
* @param cls the plugin context (as returned by "init")
* @return always NULL
*/
void *
libgnunet_plugin_rest_identity_done (void *cls)
{
struct GNUNET_REST_Plugin *api = cls;
struct Plugin *plugin = api->cls;
plugin->cfg = NULL;
GNUNET_free_non_null(allow_methods);
GNUNET_free(api);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Identity REST plugin is finished\n");
return NULL;
}
/* end of plugin_rest_identity.c */