telodendria/src/Uia.c
Jordan Bancino 0b11b97022 Add StrEquals(), as equality checking is the most common use for strcmp().
This allows us to get rid of the hideous MATRIX_PATH_PART_EQUALS macro,
and prevents inconsistent usage of strcmp() (for example, !strcmp() vs
strcmp() == 0).

StrEquals() also has sensible behavior for dealing with NULL strings (it
doesn't just segfault like strcmp()).
2023-05-06 22:34:36 +00:00

517 lines
13 KiB
C

/*
* 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 <Uia.h>
#include <string.h>
#include <RegToken.h>
#include <Memory.h>
#include <Array.h>
#include <Json.h>
#include <Str.h>
#include <Util.h>
#include <Matrix.h>
#include <User.h>
struct UiaStage
{
char *type;
HashMap *params;
};
static HashMap *
BuildFlows(Array * flows)
{
HashMap *response;
Array *responseFlows;
HashMap *responseParams;
size_t i, j;
if (!flows)
{
return NULL;
}
response = HashMapCreate();
if (!response)
{
return NULL;
}
responseFlows = ArrayCreate();
if (!responseFlows)
{
HashMapFree(response);
return NULL;
}
responseParams = HashMapCreate();
if (!responseParams)
{
HashMapFree(response);
ArrayFree(responseFlows);
return NULL;
}
HashMapSet(response, "flows", JsonValueArray(responseFlows));
HashMapSet(response, "params", JsonValueObject(responseParams));
for (i = 0; i < ArraySize(flows); i++)
{
Array *stages = ArrayGet(flows, i);
HashMap *responseFlow = HashMapCreate();
Array *responseStages = ArrayCreate();
HashMapSet(responseFlow, "stages", JsonValueArray(responseStages));
ArrayAdd(responseFlows, JsonValueObject(responseFlow));
for (j = 0; j < ArraySize(stages); j++)
{
UiaStage *stage = ArrayGet(stages, j);
ArrayAdd(responseStages, JsonValueString(stage->type));
if (stage->params)
{
JsonValueFree(HashMapSet(responseParams, stage->type, JsonValueObject(stage->params)));
}
}
}
return response;
}
static int
BuildResponse(Array * flows, Db * db, HashMap ** response, char *session, DbRef * ref)
{
HashMap *json;
*response = BuildFlows(flows);
if (!*response)
{
return -1;
}
if (!session)
{
session = StrRandom(16);
if (!session)
{
JsonFree(*response);
return -1;
}
ref = DbCreate(db, 2, "user_interactive", session);
if (!ref)
{
Free(session);
JsonFree(*response);
return -1;
}
json = DbJson(ref);
HashMapSet(json, "completed", JsonValueArray(ArrayCreate()));
HashMapSet(json, "last_access", JsonValueInteger(UtilServerTs()));
DbUnlock(db, ref);
HashMapSet(*response, "completed", JsonValueArray(ArrayCreate()));
}
else
{
Array *completed = ArrayCreate();
Array *dbCompleted;
size_t i;
if (!completed)
{
JsonFree(*response);
return -1;
}
json = DbJson(ref);
dbCompleted = JsonValueAsArray(HashMapGet(json, "completed"));
for (i = 0; i < ArraySize(dbCompleted); i++)
{
char *stage = JsonValueAsString(ArrayGet(dbCompleted, i));
ArrayAdd(completed, JsonValueString(stage));
}
HashMapSet(*response, "completed", JsonValueArray(completed));
session = StrDuplicate(session);
}
HashMapSet(*response, "session", JsonValueString(session));
Free(session);
return 0;
}
Array *
UiaDummyFlow(void)
{
Array *response = ArrayCreate();
if (!response)
{
return NULL;
}
ArrayAdd(response, UiaStageBuild("m.login.dummy", NULL));
return response;
}
UiaStage *
UiaStageBuild(char *type, HashMap * params)
{
UiaStage *stage = Malloc(sizeof(UiaStage));
if (!stage)
{
return NULL;
}
stage->type = StrDuplicate(type);
stage->params = params;
return stage;
}
int
UiaComplete(Array * flows, HttpServerContext * context, Db * db,
HashMap * request, HashMap ** response, Config * config)
{
JsonValue *val;
HashMap *auth;
char *session;
char *authType;
Array *completed;
Array *possibleNext;
int remaining[16]; /* There should never be more than
* this many stages in a flow,
* right? */
size_t i;
DbRef *dbRef;
HashMap *dbJson;
int ret;
if (!flows)
{
return -1;
}
if (!context || !db || !request || !response)
{
return -1;
}
val = HashMapGet(request, "auth");
if (!val)
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
return BuildResponse(flows, db, response, NULL, NULL);
}
if (JsonValueType(val) != JSON_OBJECT)
{
HttpResponseStatus(context, HTTP_BAD_REQUEST);
*response = MatrixErrorCreate(M_BAD_JSON);
return 0;
}
auth = JsonValueAsObject(val);
val = HashMapGet(auth, "session");
if (!val || JsonValueType(val) != JSON_STRING)
{
HttpResponseStatus(context, HTTP_BAD_REQUEST);
*response = MatrixErrorCreate(M_BAD_JSON);
return 0;
}
session = JsonValueAsString(val);
dbRef = DbLock(db, 2, "user_interactive", session);
if (!dbRef)
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
return BuildResponse(flows, db, response, NULL, NULL);
}
dbJson = DbJson(dbRef);
completed = JsonValueAsArray(HashMapGet(dbJson, "completed"));
possibleNext = ArrayCreate();
for (i = 0; i < ArraySize(flows); i++)
{
size_t j;
Array *stages = ArrayGet(flows, i);
if (ArraySize(stages) > ArraySize(completed))
{
UiaStage *stage = ArrayGet(stages, ArraySize(completed));
ArrayAdd(possibleNext, stage->type);
remaining[ArraySize(possibleNext) - 1] = ArraySize(stages) - ArraySize(completed);
}
else if (ArraySize(stages) == ArraySize(completed))
{
for (j = 0; j < ArraySize(stages); j++)
{
UiaStage *stage = ArrayGet(stages, j);
char *flowStage = stage->type;
char *completedStage = JsonValueAsString(ArrayGet(completed, j));
if (!StrEquals(flowStage, completedStage))
{
break;
}
}
if (j == ArraySize(stages))
{
/* Success: completed matches a stage perfectly */
ret = 1;
goto finish;
}
}
}
val = HashMapGet(auth, "type");
if (!val || JsonValueType(val) != JSON_STRING)
{
HttpResponseStatus(context, HTTP_BAD_REQUEST);
*response = MatrixErrorCreate(M_BAD_JSON);
ret = 0;
goto finish;
}
authType = JsonValueAsString(val);
for (i = 0; i < ArraySize(possibleNext); i++)
{
char *possible = ArrayGet(possibleNext, i);
if (StrEquals(authType, possible))
{
break;
}
}
if (i == ArraySize(possibleNext))
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
ret = BuildResponse(flows, db, response, session, dbRef);
goto finish;
}
if (StrEquals(authType, "m.login.dummy"))
{
/* Do nothing */
}
else if (StrEquals(authType, "m.login.password"))
{
char *password = JsonValueAsString(HashMapGet(auth, "password"));
HashMap *identifier = JsonValueAsObject(HashMapGet(auth, "identifier"));
char *type;
UserId *userId;
User *user;
if (!password || !identifier)
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
ret = BuildResponse(flows, db, response, session, dbRef);
goto finish;
}
type = JsonValueAsString(HashMapGet(identifier, "type"));
userId = UserIdParse(JsonValueAsString(HashMapGet(identifier, "user")),
config->serverName);
if (!type || !StrEquals(type, "m.id.user")
|| !userId || !StrEquals(userId->server, config->serverName))
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
ret = BuildResponse(flows, db, response, session, dbRef);
UserIdFree(userId);
goto finish;
}
user = UserLock(db, userId->localpart);
if (!user)
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
ret = BuildResponse(flows, db, response, session, dbRef);
UserIdFree(userId);
goto finish;
}
if (!UserCheckPassword(user, password))
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
ret = BuildResponse(flows, db, response, session, dbRef);
UserIdFree(userId);
UserUnlock(user);
goto finish;
}
UserIdFree(userId);
UserUnlock(user);
}
else if (StrEquals(authType, "m.login.registration_token"))
{
RegTokenInfo *tokenInfo;
char *token = JsonValueAsString(HashMapGet(auth, "token"));
if (!RegTokenExists(db, token))
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
ret = BuildResponse(flows, db, response, session, dbRef);
goto finish;
}
tokenInfo = RegTokenGetInfo(db, token);
if (!RegTokenValid(tokenInfo))
{
RegTokenClose(tokenInfo);
RegTokenFree(tokenInfo);
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
ret = BuildResponse(flows, db, response, session, dbRef);
goto finish;
}
/* Use the token, and then close it. */
RegTokenUse(tokenInfo);
RegTokenClose(tokenInfo);
RegTokenFree(tokenInfo);
/*
* Drop the registration token into the session storage because
* the registration endpoint will have to extract the proper
* privileges to set on the user based on the token.
*/
JsonValueFree(HashMapSet(dbJson, "registration_token", JsonValueString(token)));
}
/* TODO: implement m.login.recaptcha, m.login.sso,
* m.login.email.identity, m.login.msisdn here */
else
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
ret = BuildResponse(flows, db, response, session, dbRef);
goto finish;
}
ArrayAdd(completed, JsonValueString(authType));
if (remaining[i] - 1 > 0)
{
HttpResponseStatus(context, HTTP_UNAUTHORIZED);
ret = BuildResponse(flows, db, response, session, dbRef);
goto finish;
}
ret = 1;
finish:
ArrayFree(possibleNext);
JsonValueFree(HashMapSet(dbJson, "last_access", JsonValueInteger(UtilServerTs())));
DbUnlock(db, dbRef);
return ret;
}
void
UiaFlowsFree(Array * flows)
{
size_t i, j;
if (!flows)
{
return;
}
for (i = 0; i < ArraySize(flows); i++)
{
Array *stages = ArrayGet(flows, i);
for (j = 0; j < ArraySize(stages); j++)
{
UiaStage *stage = ArrayGet(stages, j);
Free(stage->type);
/* stage->params, if not null, is referenced in the
* response body. */
Free(stage);
}
ArrayFree(stages);
}
ArrayFree(flows);
}
void
UiaCleanup(MatrixHttpHandlerArgs * args)
{
Array *sessions = DbList(args->db, 1, "user_interactive");
size_t i;
Log(LOG_DEBUG, "User Interactive Auth sessions: %lu",
ArraySize(sessions));
for (i = 0; i < ArraySize(sessions); i++)
{
char *session = ArrayGet(sessions, i);
DbRef *ref = DbLock(args->db, 2, "user_interactive", session);
unsigned long lastAccess;
if (!ref)
{
Log(LOG_ERR, "Unable to lock uia %s for inspection.",
session);
continue;
}
lastAccess = JsonValueAsInteger(HashMapGet(DbJson(ref), "last_access"));
DbUnlock(args->db, ref);
/* If last access was greater than 15 minutes ago, remove this
* session */
if (UtilServerTs() - lastAccess > 1000 * 60 * 15)
{
DbDelete(args->db, 2, "user_interactive", session);
Log(LOG_DEBUG, "Deleted session %s", session);
}
}
DbListFree(sessions);
}