Telodendria/src/UserInteractiveAuth.c

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/*
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* Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <UserInteractiveAuth.h>
#include <Json.h>
#include <String.h>
#include <Matrix.h>
#include <string.h>
static HashMap *
BuildDummyFlow(void)
{
HashMap *response = HashMapCreate();
HashMap *dummyFlow = HashMapCreate();
Array *stages = ArrayCreate();
Array *flows = ArrayCreate();
ArrayAdd(stages,
JsonValueString(StringDuplicate("m.login.dummy")));
HashMapSet(dummyFlow, "stages", JsonValueArray(stages));
ArrayAdd(flows, JsonValueObject(dummyFlow));
HashMapSet(response, "flows", JsonValueArray(flows));
HashMapSet(response, "params",
JsonValueObject(HashMapCreate()));
return response;
}
HashMap *
UserInteractiveAuth(HttpServerContext * context, Db * db,
HashMap * request)
{
JsonValue *auth;
JsonValue *type;
JsonValue *session;
HashMap *authObj;
char *typeStr;
char *sessionStr;
DbRef *ref;
auth = HashMapGet(request, "auth");
if (!auth)
{
HashMap *response = NULL;
HashMap *persist;
char *session = StringRandom(24);
ref = DbLock(db, 1, "user_interactive");
if (!ref)
{
ref = DbCreate(db, 1, "user_interactive");
}
persist = DbJson(ref);
HashMapSet(persist, session, JsonValueNull());
DbUnlock(db, ref);
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
response = BuildDummyFlow();
HashMapSet(response, "session",
JsonValueString(StringDuplicate(session)));
return response;
}
if (JsonValueType(auth) != JSON_OBJECT)
{
HttpResponseStatus(context, HTTP_BAD_REQUEST);
return MatrixErrorCreate(M_BAD_JSON);
}
authObj = JsonValueAsObject(auth);
type = HashMapGet(authObj, "type");
session = HashMapGet(authObj, "session");
if (!type || JsonValueType(type) != JSON_STRING)
{
HttpResponseStatus(context, HTTP_BAD_REQUEST);
return MatrixErrorCreate(M_BAD_JSON);
}
if (!session || JsonValueType(session) != JSON_STRING)
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
return BuildDummyFlow();
}
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typeStr = JsonValueAsString(type);
sessionStr = JsonValueAsString(session);
if (strcmp(typeStr, "m.login.dummy") != 0)
{
HttpResponseStatus(context, HTTP_BAD_REQUEST);
return MatrixErrorCreate(M_INVALID_PARAM);
}
ref = DbLock(db, 1, "user_interactive");
/* Check to see if session exists */
if (!ref || !HashMapGet(DbJson(ref), sessionStr))
{
HttpResponseStatus(context, HTTP_BAD_REQUEST);
return MatrixErrorCreate(M_UNKNOWN);
}
/* We only need to know that it exists. */
DbUnlock(db, ref);
return NULL; /* All good, auth successful */
}
void
UserInteractiveAuthCleanup(MatrixHttpHandlerArgs * args)
{
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Log(args->lc, LOG_DEBUG, "Purging old user interactive auth sessions...");
if (!DbDelete(args->db, 1, "user_interactive"))
{
Log(args->lc, LOG_ERR, "Failed to purge user_interactive.");
}
}