+++ /dev/null
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-/* dbus-auth.c Authentication
- *
- * Copyright (C) 2002, 2003, 2004 Red Hat Inc.
- *
- * Licensed under the Academic Free License version 2.1
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-#include "dbus-auth.h"
-#include "dbus-string.h"
-#include "dbus-list.h"
-#include "dbus-internals.h"
-#include "dbus-keyring.h"
-#include "dbus-sha.h"
-#include "dbus-protocol.h"
-#include "dbus-credentials.h"
-
-/**
- * @defgroup DBusAuth Authentication
- * @ingroup DBusInternals
- * @brief DBusAuth object
- *
- * DBusAuth manages the authentication negotiation when a connection
- * is first established, and also manage any encryption used over a
- * connection.
- *
- * @todo some SASL profiles require sending the empty string as a
- * challenge/response, but we don't currently allow that in our
- * protocol.
- *
- * @todo right now sometimes both ends will block waiting for input
- * from the other end, e.g. if there's an error during
- * DBUS_COOKIE_SHA1.
- *
- * @todo the cookie keyring needs to be cached globally not just
- * per-auth (which raises threadsafety issues too)
- *
- * @todo grep FIXME in dbus-auth.c
- */
-
-/**
- * @defgroup DBusAuthInternals Authentication implementation details
- * @ingroup DBusInternals
- * @brief DBusAuth implementation details
- *
- * Private details of authentication code.
- *
- * @{
- */
-
-/**
- * This function appends an initial client response to the given string
- */
-typedef dbus_bool_t (* DBusInitialResponseFunction) (DBusAuth *auth,
- DBusString *response);
-
-/**
- * This function processes a block of data received from the peer.
- * i.e. handles a DATA command.
- */
-typedef dbus_bool_t (* DBusAuthDataFunction) (DBusAuth *auth,
- const DBusString *data);
-
-/**
- * This function encodes a block of data from the peer.
- */
-typedef dbus_bool_t (* DBusAuthEncodeFunction) (DBusAuth *auth,
- const DBusString *data,
- DBusString *encoded);
-
-/**
- * This function decodes a block of data from the peer.
- */
-typedef dbus_bool_t (* DBusAuthDecodeFunction) (DBusAuth *auth,
- const DBusString *data,
- DBusString *decoded);
-
-/**
- * This function is called when the mechanism is abandoned.
- */
-typedef void (* DBusAuthShutdownFunction) (DBusAuth *auth);
-
-/**
- * Virtual table representing a particular auth mechanism.
- */
-typedef struct
-{
- const char *mechanism; /**< Name of the mechanism */
- DBusAuthDataFunction server_data_func; /**< Function on server side for DATA */
- DBusAuthEncodeFunction server_encode_func; /**< Function on server side to encode */
- DBusAuthDecodeFunction server_decode_func; /**< Function on server side to decode */
- DBusAuthShutdownFunction server_shutdown_func; /**< Function on server side to shut down */
- DBusInitialResponseFunction client_initial_response_func; /**< Function on client side to handle initial response */
- DBusAuthDataFunction client_data_func; /**< Function on client side for DATA */
- DBusAuthEncodeFunction client_encode_func; /**< Function on client side for encode */
- DBusAuthDecodeFunction client_decode_func; /**< Function on client side for decode */
- DBusAuthShutdownFunction client_shutdown_func; /**< Function on client side for shutdown */
-} DBusAuthMechanismHandler;
-
-/**
- * Enumeration for the known authentication commands.
- */
-typedef enum {
- DBUS_AUTH_COMMAND_AUTH,
- DBUS_AUTH_COMMAND_CANCEL,
- DBUS_AUTH_COMMAND_DATA,
- DBUS_AUTH_COMMAND_BEGIN,
- DBUS_AUTH_COMMAND_REJECTED,
- DBUS_AUTH_COMMAND_OK,
- DBUS_AUTH_COMMAND_ERROR,
- DBUS_AUTH_COMMAND_UNKNOWN
-} DBusAuthCommand;
-
-/**
- * Auth state function, determines the reaction to incoming events for
- * a particular state. Returns whether we had enough memory to
- * complete the operation.
- */
-typedef dbus_bool_t (* DBusAuthStateFunction) (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args);
-
-/**
- * Information about a auth state.
- */
-typedef struct
-{
- const char *name; /**< Name of the state */
- DBusAuthStateFunction handler; /**< State function for this state */
-} DBusAuthStateData;
-
-/**
- * Internal members of DBusAuth.
- */
-struct DBusAuth
-{
- int refcount; /**< reference count */
- const char *side; /**< Client or server */
-
- DBusString incoming; /**< Incoming data buffer */
- DBusString outgoing; /**< Outgoing data buffer */
-
- const DBusAuthStateData *state; /**< Current protocol state */
-
- const DBusAuthMechanismHandler *mech; /**< Current auth mechanism */
-
- DBusString identity; /**< Current identity we're authorizing
- * as.
- */
-
- DBusCredentials *credentials; /**< Credentials read from socket
- */
-
- DBusCredentials *authorized_identity; /**< Credentials that are authorized */
-
- DBusCredentials *desired_identity; /**< Identity client has requested */
-
- DBusString context; /**< Cookie scope */
- DBusKeyring *keyring; /**< Keyring for cookie mechanism. */
- int cookie_id; /**< ID of cookie to use */
- DBusString challenge; /**< Challenge sent to client */
-
- char **allowed_mechs; /**< Mechanisms we're allowed to use,
- * or #NULL if we can use any
- */
-
- unsigned int needed_memory : 1; /**< We needed memory to continue since last
- * successful getting something done
- */
- unsigned int already_got_mechanisms : 1; /**< Client already got mech list */
- unsigned int already_asked_for_initial_response : 1; /**< Already sent a blank challenge to get an initial response */
- unsigned int buffer_outstanding : 1; /**< Buffer is "checked out" for reading data into */
-};
-
-/**
- * "Subclass" of DBusAuth for client side
- */
-typedef struct
-{
- DBusAuth base; /**< Parent class */
-
- DBusList *mechs_to_try; /**< Mechanisms we got from the server that we're going to try using */
-
- DBusString guid_from_server; /**< GUID received from server */
-
-} DBusAuthClient;
-
-/**
- * "Subclass" of DBusAuth for server side.
- */
-typedef struct
-{
- DBusAuth base; /**< Parent class */
-
- int failures; /**< Number of times client has been rejected */
- int max_failures; /**< Number of times we reject before disconnect */
-
- DBusString guid; /**< Our globally unique ID in hex encoding */
-
-} DBusAuthServer;
-
-static void goto_state (DBusAuth *auth,
- const DBusAuthStateData *new_state);
-static dbus_bool_t send_auth (DBusAuth *auth,
- const DBusAuthMechanismHandler *mech);
-static dbus_bool_t send_data (DBusAuth *auth,
- DBusString *data);
-static dbus_bool_t send_rejected (DBusAuth *auth);
-static dbus_bool_t send_error (DBusAuth *auth,
- const char *message);
-static dbus_bool_t send_ok (DBusAuth *auth);
-static dbus_bool_t send_begin (DBusAuth *auth,
- const DBusString *args_from_ok);
-static dbus_bool_t send_cancel (DBusAuth *auth);
-
-/**
- * Client states
- */
-
-static dbus_bool_t handle_server_state_waiting_for_auth (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args);
-static dbus_bool_t handle_server_state_waiting_for_data (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args);
-static dbus_bool_t handle_server_state_waiting_for_begin (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args);
-
-static const DBusAuthStateData server_state_waiting_for_auth = {
- "WaitingForAuth", handle_server_state_waiting_for_auth
-};
-static const DBusAuthStateData server_state_waiting_for_data = {
- "WaitingForData", handle_server_state_waiting_for_data
-};
-static const DBusAuthStateData server_state_waiting_for_begin = {
- "WaitingForBegin", handle_server_state_waiting_for_begin
-};
-
-/**
- * Client states
- */
-
-static dbus_bool_t handle_client_state_waiting_for_data (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args);
-static dbus_bool_t handle_client_state_waiting_for_ok (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args);
-static dbus_bool_t handle_client_state_waiting_for_reject (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args);
-
-static const DBusAuthStateData client_state_need_send_auth = {
- "NeedSendAuth", NULL
-};
-static const DBusAuthStateData client_state_waiting_for_data = {
- "WaitingForData", handle_client_state_waiting_for_data
-};
-static const DBusAuthStateData client_state_waiting_for_ok = {
- "WaitingForOK", handle_client_state_waiting_for_ok
-};
-static const DBusAuthStateData client_state_waiting_for_reject = {
- "WaitingForReject", handle_client_state_waiting_for_reject
-};
-
-/**
- * Common terminal states. Terminal states have handler == NULL.
- */
-
-static const DBusAuthStateData common_state_authenticated = {
- "Authenticated", NULL
-};
-
-static const DBusAuthStateData common_state_need_disconnect = {
- "NeedDisconnect", NULL
-};
-
-static const char auth_side_client[] = "client";
-static const char auth_side_server[] = "server";
-/**
- * @param auth the auth conversation
- * @returns #TRUE if the conversation is the server side
- */
-#define DBUS_AUTH_IS_SERVER(auth) ((auth)->side == auth_side_server)
-/**
- * @param auth the auth conversation
- * @returns #TRUE if the conversation is the client side
- */
-#define DBUS_AUTH_IS_CLIENT(auth) ((auth)->side == auth_side_client)
-/**
- * @param auth the auth conversation
- * @returns auth cast to DBusAuthClient
- */
-#define DBUS_AUTH_CLIENT(auth) ((DBusAuthClient*)(auth))
-/**
- * @param auth the auth conversation
- * @returns auth cast to DBusAuthServer
- */
-#define DBUS_AUTH_SERVER(auth) ((DBusAuthServer*)(auth))
-
-/**
- * The name of the auth ("client" or "server")
- * @param auth the auth conversation
- * @returns a string
- */
-#define DBUS_AUTH_NAME(auth) ((auth)->side)
-
-static DBusAuth*
-_dbus_auth_new (int size)
-{
- DBusAuth *auth;
-
- auth = dbus_malloc0 (size);
- if (auth == NULL)
- return NULL;
-
- auth->refcount = 1;
-
- auth->keyring = NULL;
- auth->cookie_id = -1;
-
- /* note that we don't use the max string length feature,
- * because you can't use that feature if you're going to
- * try to recover from out-of-memory (it creates
- * what looks like unrecoverable inability to alloc
- * more space in the string). But we do handle
- * overlong buffers in _dbus_auth_do_work().
- */
-
- if (!_dbus_string_init (&auth->incoming))
- goto enomem_0;
-
- if (!_dbus_string_init (&auth->outgoing))
- goto enomem_1;
-
- if (!_dbus_string_init (&auth->identity))
- goto enomem_2;
-
- if (!_dbus_string_init (&auth->context))
- goto enomem_3;
-
- if (!_dbus_string_init (&auth->challenge))
- goto enomem_4;
-
- /* default context if none is specified */
- if (!_dbus_string_append (&auth->context, "org_freedesktop_general"))
- goto enomem_5;
-
- auth->credentials = _dbus_credentials_new ();
- if (auth->credentials == NULL)
- goto enomem_6;
-
- auth->authorized_identity = _dbus_credentials_new ();
- if (auth->authorized_identity == NULL)
- goto enomem_7;
-
- auth->desired_identity = _dbus_credentials_new ();
- if (auth->desired_identity == NULL)
- goto enomem_8;
-
- return auth;
-
-#if 0
- enomem_9:
- _dbus_credentials_unref (auth->desired_identity);
-#endif
- enomem_8:
- _dbus_credentials_unref (auth->authorized_identity);
- enomem_7:
- _dbus_credentials_unref (auth->credentials);
- enomem_6:
- /* last alloc was an append to context, which is freed already below */ ;
- enomem_5:
- _dbus_string_free (&auth->challenge);
- enomem_4:
- _dbus_string_free (&auth->context);
- enomem_3:
- _dbus_string_free (&auth->identity);
- enomem_2:
- _dbus_string_free (&auth->outgoing);
- enomem_1:
- _dbus_string_free (&auth->incoming);
- enomem_0:
- dbus_free (auth);
- return NULL;
-}
-
-static void
-shutdown_mech (DBusAuth *auth)
-{
- /* Cancel any auth */
- auth->already_asked_for_initial_response = FALSE;
- _dbus_string_set_length (&auth->identity, 0);
-
- _dbus_credentials_clear (auth->authorized_identity);
- _dbus_credentials_clear (auth->desired_identity);
-
- if (auth->mech != NULL)
- {
- _dbus_verbose ("%s: Shutting down mechanism %s\n",
- DBUS_AUTH_NAME (auth), auth->mech->mechanism);
-
- if (DBUS_AUTH_IS_CLIENT (auth))
- (* auth->mech->client_shutdown_func) (auth);
- else
- (* auth->mech->server_shutdown_func) (auth);
-
- auth->mech = NULL;
- }
-}
-
-/*
- * DBUS_COOKIE_SHA1 mechanism
- */
-
-/* Returns TRUE but with an empty string hash if the
- * cookie_id isn't known. As with all this code
- * TRUE just means we had enough memory.
- */
-static dbus_bool_t
-sha1_compute_hash (DBusAuth *auth,
- int cookie_id,
- const DBusString *server_challenge,
- const DBusString *client_challenge,
- DBusString *hash)
-{
- DBusString cookie;
- DBusString to_hash;
- dbus_bool_t retval;
-
- _dbus_assert (auth->keyring != NULL);
-
- retval = FALSE;
-
- if (!_dbus_string_init (&cookie))
- return FALSE;
-
- if (!_dbus_keyring_get_hex_key (auth->keyring, cookie_id,
- &cookie))
- goto out_0;
-
- if (_dbus_string_get_length (&cookie) == 0)
- {
- retval = TRUE;
- goto out_0;
- }
-
- if (!_dbus_string_init (&to_hash))
- goto out_0;
-
- if (!_dbus_string_copy (server_challenge, 0,
- &to_hash, _dbus_string_get_length (&to_hash)))
- goto out_1;
-
- if (!_dbus_string_append (&to_hash, ":"))
- goto out_1;
-
- if (!_dbus_string_copy (client_challenge, 0,
- &to_hash, _dbus_string_get_length (&to_hash)))
- goto out_1;
-
- if (!_dbus_string_append (&to_hash, ":"))
- goto out_1;
-
- if (!_dbus_string_copy (&cookie, 0,
- &to_hash, _dbus_string_get_length (&to_hash)))
- goto out_1;
-
- if (!_dbus_sha_compute (&to_hash, hash))
- goto out_1;
-
- retval = TRUE;
-
- out_1:
- _dbus_string_zero (&to_hash);
- _dbus_string_free (&to_hash);
- out_0:
- _dbus_string_zero (&cookie);
- _dbus_string_free (&cookie);
- return retval;
-}
-
-/** http://www.ietf.org/rfc/rfc2831.txt suggests at least 64 bits of
- * entropy, we use 128. This is the number of bytes in the random
- * challenge.
- */
-#define N_CHALLENGE_BYTES (128/8)
-
-static dbus_bool_t
-sha1_handle_first_client_response (DBusAuth *auth,
- const DBusString *data)
-{
- /* We haven't sent a challenge yet, we're expecting a desired
- * username from the client.
- */
- DBusString tmp;
- DBusString tmp2;
- dbus_bool_t retval;
- DBusError error;
-
- retval = FALSE;
-
- _dbus_string_set_length (&auth->challenge, 0);
-
- if (_dbus_string_get_length (data) > 0)
- {
- if (_dbus_string_get_length (&auth->identity) > 0)
- {
- /* Tried to send two auth identities, wtf */
- _dbus_verbose ("%s: client tried to send auth identity, but we already have one\n",
- DBUS_AUTH_NAME (auth));
- return send_rejected (auth);
- }
- else
- {
- /* this is our auth identity */
- if (!_dbus_string_copy (data, 0, &auth->identity, 0))
- return FALSE;
- }
- }
-
- if (!_dbus_credentials_add_from_user (auth->desired_identity, data))
- {
- _dbus_verbose ("%s: Did not get a valid username from client\n",
- DBUS_AUTH_NAME (auth));
- return send_rejected (auth);
- }
-
- if (!_dbus_string_init (&tmp))
- return FALSE;
-
- if (!_dbus_string_init (&tmp2))
- {
- _dbus_string_free (&tmp);
- return FALSE;
- }
-
- /* we cache the keyring for speed, so here we drop it if it's the
- * wrong one. FIXME caching the keyring here is useless since we use
- * a different DBusAuth for every connection.
- */
- if (auth->keyring &&
- !_dbus_keyring_is_for_credentials (auth->keyring,
- auth->desired_identity))
- {
- _dbus_keyring_unref (auth->keyring);
- auth->keyring = NULL;
- }
-
- if (auth->keyring == NULL)
- {
- dbus_error_init (&error);
- auth->keyring = _dbus_keyring_new_for_credentials (auth->desired_identity,
- &auth->context,
- &error);
-
- if (auth->keyring == NULL)
- {
- if (dbus_error_has_name (&error,
- DBUS_ERROR_NO_MEMORY))
- {
- dbus_error_free (&error);
- goto out;
- }
- else
- {
- _DBUS_ASSERT_ERROR_IS_SET (&error);
- _dbus_verbose ("%s: Error loading keyring: %s\n",
- DBUS_AUTH_NAME (auth), error.message);
- if (send_rejected (auth))
- retval = TRUE; /* retval is only about mem */
- dbus_error_free (&error);
- goto out;
- }
- }
- else
- {
- _dbus_assert (!dbus_error_is_set (&error));
- }
- }
-
- _dbus_assert (auth->keyring != NULL);
-
- dbus_error_init (&error);
- auth->cookie_id = _dbus_keyring_get_best_key (auth->keyring, &error);
- if (auth->cookie_id < 0)
- {
- _DBUS_ASSERT_ERROR_IS_SET (&error);
- _dbus_verbose ("%s: Could not get a cookie ID to send to client: %s\n",
- DBUS_AUTH_NAME (auth), error.message);
- if (send_rejected (auth))
- retval = TRUE;
- dbus_error_free (&error);
- goto out;
- }
- else
- {
- _dbus_assert (!dbus_error_is_set (&error));
- }
-
- if (!_dbus_string_copy (&auth->context, 0,
- &tmp2, _dbus_string_get_length (&tmp2)))
- goto out;
-
- if (!_dbus_string_append (&tmp2, " "))
- goto out;
-
- if (!_dbus_string_append_int (&tmp2, auth->cookie_id))
- goto out;
-
- if (!_dbus_string_append (&tmp2, " "))
- goto out;
-
- if (!_dbus_generate_random_bytes (&tmp, N_CHALLENGE_BYTES))
- goto out;
-
- _dbus_string_set_length (&auth->challenge, 0);
- if (!_dbus_string_hex_encode (&tmp, 0, &auth->challenge, 0))
- goto out;
-
- if (!_dbus_string_hex_encode (&tmp, 0, &tmp2,
- _dbus_string_get_length (&tmp2)))
- goto out;
-
- if (!send_data (auth, &tmp2))
- goto out;
-
- goto_state (auth, &server_state_waiting_for_data);
- retval = TRUE;
-
- out:
- _dbus_string_zero (&tmp);
- _dbus_string_free (&tmp);
- _dbus_string_zero (&tmp2);
- _dbus_string_free (&tmp2);
-
- return retval;
-}
-
-static dbus_bool_t
-sha1_handle_second_client_response (DBusAuth *auth,
- const DBusString *data)
-{
- /* We are expecting a response which is the hex-encoded client
- * challenge, space, then SHA-1 hash of the concatenation of our
- * challenge, ":", client challenge, ":", secret key, all
- * hex-encoded.
- */
- int i;
- DBusString client_challenge;
- DBusString client_hash;
- dbus_bool_t retval;
- DBusString correct_hash;
-
- retval = FALSE;
-
- if (!_dbus_string_find_blank (data, 0, &i))
- {
- _dbus_verbose ("%s: no space separator in client response\n",
- DBUS_AUTH_NAME (auth));
- return send_rejected (auth);
- }
-
- if (!_dbus_string_init (&client_challenge))
- goto out_0;
-
- if (!_dbus_string_init (&client_hash))
- goto out_1;
-
- if (!_dbus_string_copy_len (data, 0, i, &client_challenge,
- 0))
- goto out_2;
-
- _dbus_string_skip_blank (data, i, &i);
-
- if (!_dbus_string_copy_len (data, i,
- _dbus_string_get_length (data) - i,
- &client_hash,
- 0))
- goto out_2;
-
- if (_dbus_string_get_length (&client_challenge) == 0 ||
- _dbus_string_get_length (&client_hash) == 0)
- {
- _dbus_verbose ("%s: zero-length client challenge or hash\n",
- DBUS_AUTH_NAME (auth));
- if (send_rejected (auth))
- retval = TRUE;
- goto out_2;
- }
-
- if (!_dbus_string_init (&correct_hash))
- goto out_2;
-
- if (!sha1_compute_hash (auth, auth->cookie_id,
- &auth->challenge,
- &client_challenge,
- &correct_hash))
- goto out_3;
-
- /* if cookie_id was invalid, then we get an empty hash */
- if (_dbus_string_get_length (&correct_hash) == 0)
- {
- if (send_rejected (auth))
- retval = TRUE;
- goto out_3;
- }
-
- if (!_dbus_string_equal (&client_hash, &correct_hash))
- {
- if (send_rejected (auth))
- retval = TRUE;
- goto out_3;
- }
-
- if (!_dbus_credentials_add_credentials (auth->authorized_identity,
- auth->desired_identity))
- goto out_3;
-
- /* Copy process ID from the socket credentials if it's there
- */
- if (!_dbus_credentials_add_credential (auth->authorized_identity,
- DBUS_CREDENTIAL_UNIX_PROCESS_ID,
- auth->credentials))
- goto out_3;
-
- if (!send_ok (auth))
- goto out_3;
-
- _dbus_verbose ("%s: authenticated client using DBUS_COOKIE_SHA1\n",
- DBUS_AUTH_NAME (auth));
-
- retval = TRUE;
-
- out_3:
- _dbus_string_zero (&correct_hash);
- _dbus_string_free (&correct_hash);
- out_2:
- _dbus_string_zero (&client_hash);
- _dbus_string_free (&client_hash);
- out_1:
- _dbus_string_free (&client_challenge);
- out_0:
- return retval;
-}
-
-static dbus_bool_t
-handle_server_data_cookie_sha1_mech (DBusAuth *auth,
- const DBusString *data)
-{
- if (auth->cookie_id < 0)
- return sha1_handle_first_client_response (auth, data);
- else
- return sha1_handle_second_client_response (auth, data);
-}
-
-static void
-handle_server_shutdown_cookie_sha1_mech (DBusAuth *auth)
-{
- auth->cookie_id = -1;
- _dbus_string_set_length (&auth->challenge, 0);
-}
-
-static dbus_bool_t
-handle_client_initial_response_cookie_sha1_mech (DBusAuth *auth,
- DBusString *response)
-{
- DBusString username;
- dbus_bool_t retval;
-
- retval = FALSE;
-
- if (!_dbus_string_init (&username))
- return FALSE;
-
- if (!_dbus_append_user_from_current_process (&username))
- goto out_0;
-
- if (!_dbus_string_hex_encode (&username, 0,
- response,
- _dbus_string_get_length (response)))
- goto out_0;
-
- retval = TRUE;
-
- out_0:
- _dbus_string_free (&username);
-
- return retval;
-}
-
-static dbus_bool_t
-handle_client_data_cookie_sha1_mech (DBusAuth *auth,
- const DBusString *data)
-{
- /* The data we get from the server should be the cookie context
- * name, the cookie ID, and the server challenge, separated by
- * spaces. We send back our challenge string and the correct hash.
- */
- dbus_bool_t retval;
- DBusString context;
- DBusString cookie_id_str;
- DBusString server_challenge;
- DBusString client_challenge;
- DBusString correct_hash;
- DBusString tmp;
- int i, j;
- long val;
-
- retval = FALSE;
-
- if (!_dbus_string_find_blank (data, 0, &i))
- {
- if (send_error (auth,
- "Server did not send context/ID/challenge properly"))
- retval = TRUE;
- goto out_0;
- }
-
- if (!_dbus_string_init (&context))
- goto out_0;
-
- if (!_dbus_string_copy_len (data, 0, i,
- &context, 0))
- goto out_1;
-
- _dbus_string_skip_blank (data, i, &i);
- if (!_dbus_string_find_blank (data, i, &j))
- {
- if (send_error (auth,
- "Server did not send context/ID/challenge properly"))
- retval = TRUE;
- goto out_1;
- }
-
- if (!_dbus_string_init (&cookie_id_str))
- goto out_1;
-
- if (!_dbus_string_copy_len (data, i, j - i,
- &cookie_id_str, 0))
- goto out_2;
-
- if (!_dbus_string_init (&server_challenge))
- goto out_2;
-
- i = j;
- _dbus_string_skip_blank (data, i, &i);
- j = _dbus_string_get_length (data);
-
- if (!_dbus_string_copy_len (data, i, j - i,
- &server_challenge, 0))
- goto out_3;
-
- if (!_dbus_keyring_validate_context (&context))
- {
- if (send_error (auth, "Server sent invalid cookie context"))
- retval = TRUE;
- goto out_3;
- }
-
- if (!_dbus_string_parse_int (&cookie_id_str, 0, &val, NULL))
- {
- if (send_error (auth, "Could not parse cookie ID as an integer"))
- retval = TRUE;
- goto out_3;
- }
-
- if (_dbus_string_get_length (&server_challenge) == 0)
- {
- if (send_error (auth, "Empty server challenge string"))
- retval = TRUE;
- goto out_3;
- }
-
- if (auth->keyring == NULL)
- {
- DBusError error;
-
- dbus_error_init (&error);
- auth->keyring = _dbus_keyring_new_for_credentials (NULL,
- &context,
- &error);
-
- if (auth->keyring == NULL)
- {
- if (dbus_error_has_name (&error,
- DBUS_ERROR_NO_MEMORY))
- {
- dbus_error_free (&error);
- goto out_3;
- }
- else
- {
- _DBUS_ASSERT_ERROR_IS_SET (&error);
-
- _dbus_verbose ("%s: Error loading keyring: %s\n",
- DBUS_AUTH_NAME (auth), error.message);
-
- if (send_error (auth, "Could not load cookie file"))
- retval = TRUE; /* retval is only about mem */
-
- dbus_error_free (&error);
- goto out_3;
- }
- }
- else
- {
- _dbus_assert (!dbus_error_is_set (&error));
- }
- }
-
- _dbus_assert (auth->keyring != NULL);
-
- if (!_dbus_string_init (&tmp))
- goto out_3;
-
- if (!_dbus_generate_random_bytes (&tmp, N_CHALLENGE_BYTES))
- goto out_4;
-
- if (!_dbus_string_init (&client_challenge))
- goto out_4;
-
- if (!_dbus_string_hex_encode (&tmp, 0, &client_challenge, 0))
- goto out_5;
-
- if (!_dbus_string_init (&correct_hash))
- goto out_5;
-
- if (!sha1_compute_hash (auth, val,
- &server_challenge,
- &client_challenge,
- &correct_hash))
- goto out_6;
-
- if (_dbus_string_get_length (&correct_hash) == 0)
- {
- /* couldn't find the cookie ID or something */
- if (send_error (auth, "Don't have the requested cookie ID"))
- retval = TRUE;
- goto out_6;
- }
-
- _dbus_string_set_length (&tmp, 0);
-
- if (!_dbus_string_copy (&client_challenge, 0, &tmp,
- _dbus_string_get_length (&tmp)))
- goto out_6;
-
- if (!_dbus_string_append (&tmp, " "))
- goto out_6;
-
- if (!_dbus_string_copy (&correct_hash, 0, &tmp,
- _dbus_string_get_length (&tmp)))
- goto out_6;
-
- if (!send_data (auth, &tmp))
- goto out_6;
-
- retval = TRUE;
-
- out_6:
- _dbus_string_zero (&correct_hash);
- _dbus_string_free (&correct_hash);
- out_5:
- _dbus_string_free (&client_challenge);
- out_4:
- _dbus_string_zero (&tmp);
- _dbus_string_free (&tmp);
- out_3:
- _dbus_string_free (&server_challenge);
- out_2:
- _dbus_string_free (&cookie_id_str);
- out_1:
- _dbus_string_free (&context);
- out_0:
- return retval;
-}
-
-static void
-handle_client_shutdown_cookie_sha1_mech (DBusAuth *auth)
-{
- auth->cookie_id = -1;
- _dbus_string_set_length (&auth->challenge, 0);
-}
-
-/*
- * EXTERNAL mechanism
- */
-
-static dbus_bool_t
-handle_server_data_external_mech (DBusAuth *auth,
- const DBusString *data)
-{
- if (_dbus_credentials_are_anonymous (auth->credentials))
- {
- _dbus_verbose ("%s: no credentials, mechanism EXTERNAL can't authenticate\n",
- DBUS_AUTH_NAME (auth));
- return send_rejected (auth);
- }
-
- if (_dbus_string_get_length (data) > 0)
- {
- if (_dbus_string_get_length (&auth->identity) > 0)
- {
- /* Tried to send two auth identities, wtf */
- _dbus_verbose ("%s: client tried to send auth identity, but we already have one\n",
- DBUS_AUTH_NAME (auth));
- return send_rejected (auth);
- }
- else
- {
- /* this is our auth identity */
- if (!_dbus_string_copy (data, 0, &auth->identity, 0))
- return FALSE;
- }
- }
-
- /* Poke client for an auth identity, if none given */
- if (_dbus_string_get_length (&auth->identity) == 0 &&
- !auth->already_asked_for_initial_response)
- {
- if (send_data (auth, NULL))
- {
- _dbus_verbose ("%s: sending empty challenge asking client for auth identity\n",
- DBUS_AUTH_NAME (auth));
- auth->already_asked_for_initial_response = TRUE;
- goto_state (auth, &server_state_waiting_for_data);
- return TRUE;
- }
- else
- return FALSE;
- }
-
- _dbus_credentials_clear (auth->desired_identity);
-
- /* If auth->identity is still empty here, then client
- * responded with an empty string after we poked it for
- * an initial response. This means to try to auth the
- * identity provided in the credentials.
- */
- if (_dbus_string_get_length (&auth->identity) == 0)
- {
- if (!_dbus_credentials_add_credentials (auth->desired_identity,
- auth->credentials))
- {
- return FALSE; /* OOM */
- }
- }
- else
- {
- if (!_dbus_credentials_add_from_user (auth->desired_identity,
- &auth->identity))
- {
- _dbus_verbose ("%s: could not get credentials from uid string\n",
- DBUS_AUTH_NAME (auth));
- return send_rejected (auth);
- }
- }
-
- if (_dbus_credentials_are_anonymous (auth->desired_identity))
- {
- _dbus_verbose ("%s: desired user %s is no good\n",
- DBUS_AUTH_NAME (auth),
- _dbus_string_get_const_data (&auth->identity));
- return send_rejected (auth);
- }
-
- if (_dbus_credentials_are_superset (auth->credentials,
- auth->desired_identity))
- {
- /* client has authenticated */
- if (!_dbus_credentials_add_credentials (auth->authorized_identity,
- auth->desired_identity))
- return FALSE;
-
- /* also copy process ID from the socket credentials
- */
- if (!_dbus_credentials_add_credential (auth->authorized_identity,
- DBUS_CREDENTIAL_UNIX_PROCESS_ID,
- auth->credentials))
- return FALSE;
-
- /* also copy audit data from the socket credentials
- */
- if (!_dbus_credentials_add_credential (auth->authorized_identity,
- DBUS_CREDENTIAL_ADT_AUDIT_DATA_ID,
- auth->credentials))
- return FALSE;
-
- if (!send_ok (auth))
- return FALSE;
-
- _dbus_verbose ("%s: authenticated client based on socket credentials\n",
- DBUS_AUTH_NAME (auth));
-
- return TRUE;
- }
- else
- {
- _dbus_verbose ("%s: desired identity not found in socket credentials\n",
- DBUS_AUTH_NAME (auth));
- return send_rejected (auth);
- }
-}
-
-static void
-handle_server_shutdown_external_mech (DBusAuth *auth)
-{
-
-}
-
-static dbus_bool_t
-handle_client_initial_response_external_mech (DBusAuth *auth,
- DBusString *response)
-{
- /* We always append our UID as an initial response, so the server
- * doesn't have to send back an empty challenge to check whether we
- * want to specify an identity. i.e. this avoids a round trip that
- * the spec for the EXTERNAL mechanism otherwise requires.
- */
- DBusString plaintext;
-
- if (!_dbus_string_init (&plaintext))
- return FALSE;
-
- if (!_dbus_append_user_from_current_process (&plaintext))
- goto failed;
-
- if (!_dbus_string_hex_encode (&plaintext, 0,
- response,
- _dbus_string_get_length (response)))
- goto failed;
-
- _dbus_string_free (&plaintext);
-
- return TRUE;
-
- failed:
- _dbus_string_free (&plaintext);
- return FALSE;
-}
-
-static dbus_bool_t
-handle_client_data_external_mech (DBusAuth *auth,
- const DBusString *data)
-{
-
- return TRUE;
-}
-
-static void
-handle_client_shutdown_external_mech (DBusAuth *auth)
-{
-
-}
-
-/*
- * ANONYMOUS mechanism
- */
-
-static dbus_bool_t
-handle_server_data_anonymous_mech (DBusAuth *auth,
- const DBusString *data)
-{
- if (_dbus_string_get_length (data) > 0)
- {
- /* Client is allowed to send "trace" data, the only defined
- * meaning is that if it contains '@' it is an email address,
- * and otherwise it is anything else, and it's supposed to be
- * UTF-8
- */
- if (!_dbus_string_validate_utf8 (data, 0, _dbus_string_get_length (data)))
- {
- _dbus_verbose ("%s: Received invalid UTF-8 trace data from ANONYMOUS client\n",
- DBUS_AUTH_NAME (auth));
-
- {
- DBusString plaintext;
- DBusString encoded;
- _dbus_string_init_const (&plaintext, "D-Bus " VERSION);
- _dbus_string_init (&encoded);
- _dbus_string_hex_encode (&plaintext, 0,
- &encoded,
- 0);
- _dbus_verbose ("%s: try '%s'\n",
- DBUS_AUTH_NAME (auth), _dbus_string_get_const_data (&encoded));
- }
- return send_rejected (auth);
- }
-
- _dbus_verbose ("%s: ANONYMOUS client sent trace string: '%s'\n",
- DBUS_AUTH_NAME (auth),
- _dbus_string_get_const_data (data));
- }
-
- /* We want to be anonymous (clear in case some other protocol got midway through I guess) */
- _dbus_credentials_clear (auth->desired_identity);
-
- /* Copy process ID from the socket credentials
- */
- if (!_dbus_credentials_add_credential (auth->authorized_identity,
- DBUS_CREDENTIAL_UNIX_PROCESS_ID,
- auth->credentials))
- return FALSE;
-
- /* Anonymous is always allowed */
- if (!send_ok (auth))
- return FALSE;
-
- _dbus_verbose ("%s: authenticated client as anonymous\n",
- DBUS_AUTH_NAME (auth));
-
- return TRUE;
-}
-
-static void
-handle_server_shutdown_anonymous_mech (DBusAuth *auth)
-{
-
-}
-
-static dbus_bool_t
-handle_client_initial_response_anonymous_mech (DBusAuth *auth,
- DBusString *response)
-{
- /* Our initial response is a "trace" string which must be valid UTF-8
- * and must be an email address if it contains '@'.
- * We just send the dbus implementation info, like a user-agent or
- * something, because... why not. There's nothing guaranteed here
- * though, we could change it later.
- */
- DBusString plaintext;
-
- if (!_dbus_string_init (&plaintext))
- return FALSE;
-
- if (!_dbus_string_append (&plaintext,
- "libdbus " VERSION))
- goto failed;
-
- if (!_dbus_string_hex_encode (&plaintext, 0,
- response,
- _dbus_string_get_length (response)))
- goto failed;
-
- _dbus_string_free (&plaintext);
-
- return TRUE;
-
- failed:
- _dbus_string_free (&plaintext);
- return FALSE;
-}
-
-static dbus_bool_t
-handle_client_data_anonymous_mech (DBusAuth *auth,
- const DBusString *data)
-{
-
- return TRUE;
-}
-
-static void
-handle_client_shutdown_anonymous_mech (DBusAuth *auth)
-{
-
-}
-
-/* Put mechanisms here in order of preference.
- * Right now we have:
- *
- * - EXTERNAL checks socket credentials (or in the future, other info from the OS)
- * - DBUS_COOKIE_SHA1 uses a cookie in the home directory, like xauth or ICE
- * - ANONYMOUS checks nothing but doesn't auth the person as a user
- *
- * We might ideally add a mechanism to chain to Cyrus SASL so we can
- * use its mechanisms as well.
- *
- */
-static const DBusAuthMechanismHandler
-all_mechanisms[] = {
- { "EXTERNAL",
- handle_server_data_external_mech,
- NULL, NULL,
- handle_server_shutdown_external_mech,
- handle_client_initial_response_external_mech,
- handle_client_data_external_mech,
- NULL, NULL,
- handle_client_shutdown_external_mech },
- { "DBUS_COOKIE_SHA1",
- handle_server_data_cookie_sha1_mech,
- NULL, NULL,
- handle_server_shutdown_cookie_sha1_mech,
- handle_client_initial_response_cookie_sha1_mech,
- handle_client_data_cookie_sha1_mech,
- NULL, NULL,
- handle_client_shutdown_cookie_sha1_mech },
- { "ANONYMOUS",
- handle_server_data_anonymous_mech,
- NULL, NULL,
- handle_server_shutdown_anonymous_mech,
- handle_client_initial_response_anonymous_mech,
- handle_client_data_anonymous_mech,
- NULL, NULL,
- handle_client_shutdown_anonymous_mech },
- { NULL, NULL }
-};
-
-static const DBusAuthMechanismHandler*
-find_mech (const DBusString *name,
- char **allowed_mechs)
-{
- int i;
-
- if (allowed_mechs != NULL &&
- !_dbus_string_array_contains ((const char**) allowed_mechs,
- _dbus_string_get_const_data (name)))
- return NULL;
-
- i = 0;
- while (all_mechanisms[i].mechanism != NULL)
- {
- if (_dbus_string_equal_c_str (name,
- all_mechanisms[i].mechanism))
-
- return &all_mechanisms[i];
-
- ++i;
- }
-
- return NULL;
-}
-
-static dbus_bool_t
-send_auth (DBusAuth *auth, const DBusAuthMechanismHandler *mech)
-{
- DBusString auth_command;
-
- if (!_dbus_string_init (&auth_command))
- return FALSE;
-
- if (!_dbus_string_append (&auth_command,
- "AUTH "))
- {
- _dbus_string_free (&auth_command);
- return FALSE;
- }
-
- if (!_dbus_string_append (&auth_command,
- mech->mechanism))
- {
- _dbus_string_free (&auth_command);
- return FALSE;
- }
-
- if (mech->client_initial_response_func != NULL)
- {
- if (!_dbus_string_append (&auth_command, " "))
- {
- _dbus_string_free (&auth_command);
- return FALSE;
- }
-
- if (!(* mech->client_initial_response_func) (auth, &auth_command))
- {
- _dbus_string_free (&auth_command);
- return FALSE;
- }
- }
-
- if (!_dbus_string_append (&auth_command,
- "\r\n"))
- {
- _dbus_string_free (&auth_command);
- return FALSE;
- }
-
- if (!_dbus_string_copy (&auth_command, 0,
- &auth->outgoing,
- _dbus_string_get_length (&auth->outgoing)))
- {
- _dbus_string_free (&auth_command);
- return FALSE;
- }
-
- _dbus_string_free (&auth_command);
- shutdown_mech (auth);
- auth->mech = mech;
- goto_state (auth, &client_state_waiting_for_data);
-
- return TRUE;
-}
-
-static dbus_bool_t
-send_data (DBusAuth *auth, DBusString *data)
-{
- int old_len;
-
- if (data == NULL || _dbus_string_get_length (data) == 0)
- return _dbus_string_append (&auth->outgoing, "DATA\r\n");
- else
- {
- old_len = _dbus_string_get_length (&auth->outgoing);
- if (!_dbus_string_append (&auth->outgoing, "DATA "))
- goto out;
-
- if (!_dbus_string_hex_encode (data, 0, &auth->outgoing,
- _dbus_string_get_length (&auth->outgoing)))
- goto out;
-
- if (!_dbus_string_append (&auth->outgoing, "\r\n"))
- goto out;
-
- return TRUE;
-
- out:
- _dbus_string_set_length (&auth->outgoing, old_len);
-
- return FALSE;
- }
-}
-
-static dbus_bool_t
-send_rejected (DBusAuth *auth)
-{
- DBusString command;
- DBusAuthServer *server_auth;
- int i;
-
- if (!_dbus_string_init (&command))
- return FALSE;
-
- if (!_dbus_string_append (&command,
- "REJECTED"))
- goto nomem;
-
- i = 0;
- while (all_mechanisms[i].mechanism != NULL)
- {
- if (!_dbus_string_append (&command,
- " "))
- goto nomem;
-
- if (!_dbus_string_append (&command,
- all_mechanisms[i].mechanism))
- goto nomem;
-
- ++i;
- }
-
- if (!_dbus_string_append (&command, "\r\n"))
- goto nomem;
-
- if (!_dbus_string_copy (&command, 0, &auth->outgoing,
- _dbus_string_get_length (&auth->outgoing)))
- goto nomem;
-
- shutdown_mech (auth);
-
- _dbus_assert (DBUS_AUTH_IS_SERVER (auth));
- server_auth = DBUS_AUTH_SERVER (auth);
- server_auth->failures += 1;
-
- if (server_auth->failures >= server_auth->max_failures)
- goto_state (auth, &common_state_need_disconnect);
- else
- goto_state (auth, &server_state_waiting_for_auth);
-
- _dbus_string_free (&command);
-
- return TRUE;
-
- nomem:
- _dbus_string_free (&command);
- return FALSE;
-}
-
-static dbus_bool_t
-send_error (DBusAuth *auth, const char *message)
-{
- return _dbus_string_append_printf (&auth->outgoing,
- "ERROR \"%s\"\r\n", message);
-}
-
-static dbus_bool_t
-send_ok (DBusAuth *auth)
-{
- int orig_len;
-
- orig_len = _dbus_string_get_length (&auth->outgoing);
-
- if (_dbus_string_append (&auth->outgoing, "OK ") &&
- _dbus_string_copy (& DBUS_AUTH_SERVER (auth)->guid,
- 0,
- &auth->outgoing,
- _dbus_string_get_length (&auth->outgoing)) &&
- _dbus_string_append (&auth->outgoing, "\r\n"))
- {
- goto_state (auth, &server_state_waiting_for_begin);
- return TRUE;
- }
- else
- {
- _dbus_string_set_length (&auth->outgoing, orig_len);
- return FALSE;
- }
-}
-
-static dbus_bool_t
-send_begin (DBusAuth *auth,
- const DBusString *args_from_ok)
-{
- int end_of_hex;
-
- /* "args_from_ok" should be the GUID, whitespace already pulled off the front */
- _dbus_assert (_dbus_string_get_length (& DBUS_AUTH_CLIENT (auth)->guid_from_server) == 0);
-
- /* We decode the hex string to binary, using guid_from_server as scratch... */
-
- end_of_hex = 0;
- if (!_dbus_string_hex_decode (args_from_ok, 0, &end_of_hex,
- & DBUS_AUTH_CLIENT (auth)->guid_from_server, 0))
- return FALSE;
-
- /* now clear out the scratch */
- _dbus_string_set_length (& DBUS_AUTH_CLIENT (auth)->guid_from_server, 0);
-
- if (end_of_hex != _dbus_string_get_length (args_from_ok) ||
- end_of_hex == 0)
- {
- _dbus_verbose ("Bad GUID from server, parsed %d bytes and had %d bytes from server\n",
- end_of_hex, _dbus_string_get_length (args_from_ok));
- goto_state (auth, &common_state_need_disconnect);
- return TRUE;
- }
-
- if (_dbus_string_copy (args_from_ok, 0, &DBUS_AUTH_CLIENT (auth)->guid_from_server, 0) &&
- _dbus_string_append (&auth->outgoing, "BEGIN\r\n"))
- {
- _dbus_verbose ("Got GUID '%s' from the server\n",
- _dbus_string_get_const_data (& DBUS_AUTH_CLIENT (auth)->guid_from_server));
-
- goto_state (auth, &common_state_authenticated);
- return TRUE;
- }
- else
- {
- _dbus_string_set_length (& DBUS_AUTH_CLIENT (auth)->guid_from_server, 0);
- return FALSE;
- }
-}
-
-static dbus_bool_t
-send_cancel (DBusAuth *auth)
-{
- if (_dbus_string_append (&auth->outgoing, "CANCEL\r\n"))
- {
- goto_state (auth, &client_state_waiting_for_reject);
- return TRUE;
- }
- else
- return FALSE;
-}
-
-static dbus_bool_t
-process_data (DBusAuth *auth,
- const DBusString *args,
- DBusAuthDataFunction data_func)
-{
- int end;
- DBusString decoded;
-
- if (!_dbus_string_init (&decoded))
- return FALSE;
-
- if (!_dbus_string_hex_decode (args, 0, &end, &decoded, 0))
- {
- _dbus_string_free (&decoded);
- return FALSE;
- }
-
- if (_dbus_string_get_length (args) != end)
- {
- _dbus_string_free (&decoded);
- if (!send_error (auth, "Invalid hex encoding"))
- return FALSE;
-
- return TRUE;
- }
-
-#ifdef DBUS_ENABLE_VERBOSE_MODE
- if (_dbus_string_validate_ascii (&decoded, 0,
- _dbus_string_get_length (&decoded)))
- _dbus_verbose ("%s: data: '%s'\n",
- DBUS_AUTH_NAME (auth),
- _dbus_string_get_const_data (&decoded));
-#endif
-
- if (!(* data_func) (auth, &decoded))
- {
- _dbus_string_free (&decoded);
- return FALSE;
- }
-
- _dbus_string_free (&decoded);
- return TRUE;
-}
-
-static dbus_bool_t
-handle_auth (DBusAuth *auth, const DBusString *args)
-{
- if (_dbus_string_get_length (args) == 0)
- {
- /* No args to the auth, send mechanisms */
- if (!send_rejected (auth))
- return FALSE;
-
- return TRUE;
- }
- else
- {
- int i;
- DBusString mech;
- DBusString hex_response;
-
- _dbus_string_find_blank (args, 0, &i);
-
- if (!_dbus_string_init (&mech))
- return FALSE;
-
- if (!_dbus_string_init (&hex_response))
- {
- _dbus_string_free (&mech);
- return FALSE;
- }
-
- if (!_dbus_string_copy_len (args, 0, i, &mech, 0))
- goto failed;
-
- _dbus_string_skip_blank (args, i, &i);
- if (!_dbus_string_copy (args, i, &hex_response, 0))
- goto failed;
-
- auth->mech = find_mech (&mech, auth->allowed_mechs);
- if (auth->mech != NULL)
- {
- _dbus_verbose ("%s: Trying mechanism %s\n",
- DBUS_AUTH_NAME (auth),
- auth->mech->mechanism);
-
- if (!process_data (auth, &hex_response,
- auth->mech->server_data_func))
- goto failed;
- }
- else
- {
- /* Unsupported mechanism */
- _dbus_verbose ("%s: Unsupported mechanism %s\n",
- DBUS_AUTH_NAME (auth),
- _dbus_string_get_const_data (&mech));
-
- if (!send_rejected (auth))
- goto failed;
- }
-
- _dbus_string_free (&mech);
- _dbus_string_free (&hex_response);
-
- return TRUE;
-
- failed:
- auth->mech = NULL;
- _dbus_string_free (&mech);
- _dbus_string_free (&hex_response);
- return FALSE;
- }
-}
-
-static dbus_bool_t
-handle_server_state_waiting_for_auth (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args)
-{
- switch (command)
- {
- case DBUS_AUTH_COMMAND_AUTH:
- return handle_auth (auth, args);
-
- case DBUS_AUTH_COMMAND_CANCEL:
- case DBUS_AUTH_COMMAND_DATA:
- return send_error (auth, "Not currently in an auth conversation");
-
- case DBUS_AUTH_COMMAND_BEGIN:
- goto_state (auth, &common_state_need_disconnect);
- return TRUE;
-
- case DBUS_AUTH_COMMAND_ERROR:
- return send_rejected (auth);
-
- case DBUS_AUTH_COMMAND_REJECTED:
- case DBUS_AUTH_COMMAND_OK:
- case DBUS_AUTH_COMMAND_UNKNOWN:
- default:
- return send_error (auth, "Unknown command");
- }
-}
-
-static dbus_bool_t
-handle_server_state_waiting_for_data (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args)
-{
- switch (command)
- {
- case DBUS_AUTH_COMMAND_AUTH:
- return send_error (auth, "Sent AUTH while another AUTH in progress");
-
- case DBUS_AUTH_COMMAND_CANCEL:
- case DBUS_AUTH_COMMAND_ERROR:
- return send_rejected (auth);
-
- case DBUS_AUTH_COMMAND_DATA:
- return process_data (auth, args, auth->mech->server_data_func);
-
- case DBUS_AUTH_COMMAND_BEGIN:
- goto_state (auth, &common_state_need_disconnect);
- return TRUE;
-
- case DBUS_AUTH_COMMAND_REJECTED:
- case DBUS_AUTH_COMMAND_OK:
- case DBUS_AUTH_COMMAND_UNKNOWN:
- default:
- return send_error (auth, "Unknown command");
- }
-}
-
-static dbus_bool_t
-handle_server_state_waiting_for_begin (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args)
-{
- switch (command)
- {
- case DBUS_AUTH_COMMAND_AUTH:
- return send_error (auth, "Sent AUTH while expecting BEGIN");
-
- case DBUS_AUTH_COMMAND_DATA:
- return send_error (auth, "Sent DATA while expecting BEGIN");
-
- case DBUS_AUTH_COMMAND_BEGIN:
- goto_state (auth, &common_state_authenticated);
- return TRUE;
-
- case DBUS_AUTH_COMMAND_REJECTED:
- case DBUS_AUTH_COMMAND_OK:
- case DBUS_AUTH_COMMAND_UNKNOWN:
- default:
- return send_error (auth, "Unknown command");
-
- case DBUS_AUTH_COMMAND_CANCEL:
- case DBUS_AUTH_COMMAND_ERROR:
- return send_rejected (auth);
- }
-}
-
-/* return FALSE if no memory, TRUE if all OK */
-static dbus_bool_t
-get_word (const DBusString *str,
- int *start,
- DBusString *word)
-{
- int i;
-
- _dbus_string_skip_blank (str, *start, start);
- _dbus_string_find_blank (str, *start, &i);
-
- if (i > *start)
- {
- if (!_dbus_string_copy_len (str, *start, i - *start, word, 0))
- return FALSE;
-
- *start = i;
- }
-
- return TRUE;
-}
-
-static dbus_bool_t
-record_mechanisms (DBusAuth *auth,
- const DBusString *args)
-{
- int next;
- int len;
-
- if (auth->already_got_mechanisms)
- return TRUE;
-
- len = _dbus_string_get_length (args);
-
- next = 0;
- while (next < len)
- {
- DBusString m;
- const DBusAuthMechanismHandler *mech;
-
- if (!_dbus_string_init (&m))
- goto nomem;
-
- if (!get_word (args, &next, &m))
- {
- _dbus_string_free (&m);
- goto nomem;
- }
-
- mech = find_mech (&m, auth->allowed_mechs);
-
- if (mech != NULL)
- {
- /* FIXME right now we try mechanisms in the order
- * the server lists them; should we do them in
- * some more deterministic order?
- *
- * Probably in all_mechanisms order, our order of
- * preference. Of course when the server is us,
- * it lists things in that order anyhow.
- */
-
- if (mech != &all_mechanisms[0])
- {
- _dbus_verbose ("%s: Adding mechanism %s to list we will try\n",
- DBUS_AUTH_NAME (auth), mech->mechanism);
-
- if (!_dbus_list_append (& DBUS_AUTH_CLIENT (auth)->mechs_to_try,
- (void*) mech))
- {
- _dbus_string_free (&m);
- goto nomem;
- }
- }
- else
- {
- _dbus_verbose ("%s: Already tried mechanism %s; not adding to list we will try\n",
- DBUS_AUTH_NAME (auth), mech->mechanism);
- }
- }
- else
- {
- _dbus_verbose ("%s: Server offered mechanism \"%s\" that we don't know how to use\n",
- DBUS_AUTH_NAME (auth),
- _dbus_string_get_const_data (&m));
- }
-
- _dbus_string_free (&m);
- }
-
- auth->already_got_mechanisms = TRUE;
-
- return TRUE;
-
- nomem:
- _dbus_list_clear (& DBUS_AUTH_CLIENT (auth)->mechs_to_try);
-
- return FALSE;
-}
-
-static dbus_bool_t
-process_rejected (DBusAuth *auth, const DBusString *args)
-{
- const DBusAuthMechanismHandler *mech;
- DBusAuthClient *client;
-
- client = DBUS_AUTH_CLIENT (auth);
-
- if (!auth->already_got_mechanisms)
- {
- if (!record_mechanisms (auth, args))
- return FALSE;
- }
-
- if (DBUS_AUTH_CLIENT (auth)->mechs_to_try != NULL)
- {
- mech = client->mechs_to_try->data;
-
- if (!send_auth (auth, mech))
- return FALSE;
-
- _dbus_list_pop_first (&client->mechs_to_try);
-
- _dbus_verbose ("%s: Trying mechanism %s\n",
- DBUS_AUTH_NAME (auth),
- mech->mechanism);
- }
- else
- {
- /* Give up */
- _dbus_verbose ("%s: Disconnecting because we are out of mechanisms to try using\n",
- DBUS_AUTH_NAME (auth));
- goto_state (auth, &common_state_need_disconnect);
- }
-
- return TRUE;
-}
-
-
-static dbus_bool_t
-handle_client_state_waiting_for_data (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args)
-{
- _dbus_assert (auth->mech != NULL);
-
- switch (command)
- {
- case DBUS_AUTH_COMMAND_DATA:
- return process_data (auth, args, auth->mech->client_data_func);
-
- case DBUS_AUTH_COMMAND_REJECTED:
- return process_rejected (auth, args);
-
- case DBUS_AUTH_COMMAND_OK:
- return send_begin (auth, args);
-
- case DBUS_AUTH_COMMAND_ERROR:
- return send_cancel (auth);
-
- case DBUS_AUTH_COMMAND_AUTH:
- case DBUS_AUTH_COMMAND_CANCEL:
- case DBUS_AUTH_COMMAND_BEGIN:
- case DBUS_AUTH_COMMAND_UNKNOWN:
- default:
- return send_error (auth, "Unknown command");
- }
-}
-
-static dbus_bool_t
-handle_client_state_waiting_for_ok (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args)
-{
- switch (command)
- {
- case DBUS_AUTH_COMMAND_REJECTED:
- return process_rejected (auth, args);
-
- case DBUS_AUTH_COMMAND_OK:
- return send_begin (auth, args);
-
- case DBUS_AUTH_COMMAND_DATA:
- case DBUS_AUTH_COMMAND_ERROR:
- return send_cancel (auth);
-
- case DBUS_AUTH_COMMAND_AUTH:
- case DBUS_AUTH_COMMAND_CANCEL:
- case DBUS_AUTH_COMMAND_BEGIN:
- case DBUS_AUTH_COMMAND_UNKNOWN:
- default:
- return send_error (auth, "Unknown command");
- }
-}
-
-static dbus_bool_t
-handle_client_state_waiting_for_reject (DBusAuth *auth,
- DBusAuthCommand command,
- const DBusString *args)
-{
- switch (command)
- {
- case DBUS_AUTH_COMMAND_REJECTED:
- return process_rejected (auth, args);
-
- case DBUS_AUTH_COMMAND_AUTH:
- case DBUS_AUTH_COMMAND_CANCEL:
- case DBUS_AUTH_COMMAND_DATA:
- case DBUS_AUTH_COMMAND_BEGIN:
- case DBUS_AUTH_COMMAND_OK:
- case DBUS_AUTH_COMMAND_ERROR:
- case DBUS_AUTH_COMMAND_UNKNOWN:
- default:
- goto_state (auth, &common_state_need_disconnect);
- return TRUE;
- }
-}
-
-/**
- * Mapping from command name to enum
- */
-typedef struct {
- const char *name; /**< Name of the command */
- DBusAuthCommand command; /**< Corresponding enum */
-} DBusAuthCommandName;
-
-static const DBusAuthCommandName auth_command_names[] = {
- { "AUTH", DBUS_AUTH_COMMAND_AUTH },
- { "CANCEL", DBUS_AUTH_COMMAND_CANCEL },
- { "DATA", DBUS_AUTH_COMMAND_DATA },
- { "BEGIN", DBUS_AUTH_COMMAND_BEGIN },
- { "REJECTED", DBUS_AUTH_COMMAND_REJECTED },
- { "OK", DBUS_AUTH_COMMAND_OK },
- { "ERROR", DBUS_AUTH_COMMAND_ERROR }
-};
-
-static DBusAuthCommand
-lookup_command_from_name (DBusString *command)
-{
- int i;
-
- for (i = 0; i < _DBUS_N_ELEMENTS (auth_command_names); i++)
- {
- if (_dbus_string_equal_c_str (command,
- auth_command_names[i].name))
- return auth_command_names[i].command;
- }
-
- return DBUS_AUTH_COMMAND_UNKNOWN;
-}
-
-static void
-goto_state (DBusAuth *auth,
- const DBusAuthStateData *state)
-{
- _dbus_verbose ("%s: going from state %s to state %s\n",
- DBUS_AUTH_NAME (auth),
- auth->state->name,
- state->name);
-
- auth->state = state;
-}
-
-/* returns whether to call it again right away */
-static dbus_bool_t
-process_command (DBusAuth *auth)
-{
- DBusAuthCommand command;
- DBusString line;
- DBusString args;
- int eol;
- int i, j;
- dbus_bool_t retval;
-
- /* _dbus_verbose ("%s: trying process_command()\n"); */
-
- retval = FALSE;
-
- eol = 0;
- if (!_dbus_string_find (&auth->incoming, 0, "\r\n", &eol))
- return FALSE;
-
- if (!_dbus_string_init (&line))
- {
- auth->needed_memory = TRUE;
- return FALSE;
- }
-
- if (!_dbus_string_init (&args))
- {
- _dbus_string_free (&line);
- auth->needed_memory = TRUE;
- return FALSE;
- }
-
- if (!_dbus_string_copy_len (&auth->incoming, 0, eol, &line, 0))
- goto out;
-
- if (!_dbus_string_validate_ascii (&line, 0,
- _dbus_string_get_length (&line)))
- {
- _dbus_verbose ("%s: Command contained non-ASCII chars or embedded nul\n",
- DBUS_AUTH_NAME (auth));
- if (!send_error (auth, "Command contained non-ASCII"))
- goto out;
- else
- goto next_command;
- }
-
- _dbus_verbose ("%s: got command \"%s\"\n",
- DBUS_AUTH_NAME (auth),
- _dbus_string_get_const_data (&line));
-
- _dbus_string_find_blank (&line, 0, &i);
- _dbus_string_skip_blank (&line, i, &j);
-
- if (j > i)
- _dbus_string_delete (&line, i, j - i);
-
- if (!_dbus_string_move (&line, i, &args, 0))
- goto out;
-
- /* FIXME 1.0 we should probably validate that only the allowed
- * chars are in the command name
- */
-
- command = lookup_command_from_name (&line);
- if (!(* auth->state->handler) (auth, command, &args))
- goto out;
-
- next_command:
-
- /* We've succeeded in processing the whole command so drop it out
- * of the incoming buffer and return TRUE to try another command.
- */
-
- _dbus_string_delete (&auth->incoming, 0, eol);
-
- /* kill the \r\n */
- _dbus_string_delete (&auth->incoming, 0, 2);
-
- retval = TRUE;
-
- out:
- _dbus_string_free (&args);
- _dbus_string_free (&line);
-
- if (!retval)
- auth->needed_memory = TRUE;
- else
- auth->needed_memory = FALSE;
-
- return retval;
-}
-
-
-/** @} */
-
-/**
- * @addtogroup DBusAuth
- * @{
- */
-
-/**
- * Creates a new auth conversation object for the server side.
- * See doc/dbus-sasl-profile.txt for full details on what
- * this object does.
- *
- * @returns the new object or #NULL if no memory
- */
-DBusAuth*
-_dbus_auth_server_new (const DBusString *guid)
-{
- DBusAuth *auth;
- DBusAuthServer *server_auth;
- DBusString guid_copy;
-
- if (!_dbus_string_init (&guid_copy))
- return NULL;
-
- if (!_dbus_string_copy (guid, 0, &guid_copy, 0))
- {
- _dbus_string_free (&guid_copy);
- return NULL;
- }
-
- auth = _dbus_auth_new (sizeof (DBusAuthServer));
- if (auth == NULL)
- {
- _dbus_string_free (&guid_copy);
- return NULL;
- }
-
- auth->side = auth_side_server;
- auth->state = &server_state_waiting_for_auth;
-
- server_auth = DBUS_AUTH_SERVER (auth);
-
- server_auth->guid = guid_copy;
-
- /* perhaps this should be per-mechanism with a lower
- * max
- */
- server_auth->failures = 0;
- server_auth->max_failures = 6;
-
- return auth;
-}
-
-/**
- * Creates a new auth conversation object for the client side.
- * See doc/dbus-sasl-profile.txt for full details on what
- * this object does.
- *
- * @returns the new object or #NULL if no memory
- */
-DBusAuth*
-_dbus_auth_client_new (void)
-{
- DBusAuth *auth;
- DBusString guid_str;
-
- if (!_dbus_string_init (&guid_str))
- return NULL;
-
- auth = _dbus_auth_new (sizeof (DBusAuthClient));
- if (auth == NULL)
- {
- _dbus_string_free (&guid_str);
- return NULL;
- }
-
- DBUS_AUTH_CLIENT (auth)->guid_from_server = guid_str;
-
- auth->side = auth_side_client;
- auth->state = &client_state_need_send_auth;
-
- /* Start the auth conversation by sending AUTH for our default
- * mechanism */
- if (!send_auth (auth, &all_mechanisms[0]))
- {
- _dbus_auth_unref (auth);
- return NULL;
- }
-
- return auth;
-}
-
-/**
- * Increments the refcount of an auth object.
- *
- * @param auth the auth conversation
- * @returns the auth conversation
- */
-DBusAuth *
-_dbus_auth_ref (DBusAuth *auth)
-{
- _dbus_assert (auth != NULL);
-
- auth->refcount += 1;
-
- return auth;
-}
-
-/**
- * Decrements the refcount of an auth object.
- *
- * @param auth the auth conversation
- */
-void
-_dbus_auth_unref (DBusAuth *auth)
-{
- _dbus_assert (auth != NULL);
- _dbus_assert (auth->refcount > 0);
-
- auth->refcount -= 1;
- if (auth->refcount == 0)
- {
- shutdown_mech (auth);
-
- if (DBUS_AUTH_IS_CLIENT (auth))
- {
- _dbus_string_free (& DBUS_AUTH_CLIENT (auth)->guid_from_server);
- _dbus_list_clear (& DBUS_AUTH_CLIENT (auth)->mechs_to_try);
- }
- else
- {
- _dbus_assert (DBUS_AUTH_IS_SERVER (auth));
-
- _dbus_string_free (& DBUS_AUTH_SERVER (auth)->guid);
- }
-
- if (auth->keyring)
- _dbus_keyring_unref (auth->keyring);
-
- _dbus_string_free (&auth->context);
- _dbus_string_free (&auth->challenge);
- _dbus_string_free (&auth->identity);
- _dbus_string_free (&auth->incoming);
- _dbus_string_free (&auth->outgoing);
-
- dbus_free_string_array (auth->allowed_mechs);
-
- _dbus_credentials_unref (auth->credentials);
- _dbus_credentials_unref (auth->authorized_identity);
- _dbus_credentials_unref (auth->desired_identity);
-
- dbus_free (auth);
- }
-}
-
-/**
- * Sets an array of authentication mechanism names
- * that we are willing to use.
- *
- * @param auth the auth conversation
- * @param mechanisms #NULL-terminated array of mechanism names
- * @returns #FALSE if no memory
- */
-dbus_bool_t
-_dbus_auth_set_mechanisms (DBusAuth *auth,
- const char **mechanisms)
-{
- char **copy;
-
- if (mechanisms != NULL)
- {
- copy = _dbus_dup_string_array (mechanisms);
- if (copy == NULL)
- return FALSE;
- }
- else
- copy = NULL;
-
- dbus_free_string_array (auth->allowed_mechs);
-
- auth->allowed_mechs = copy;
-
- return TRUE;
-}
-
-/**
- * @param auth the auth conversation object
- * @returns #TRUE if we're in a final state
- */
-#define DBUS_AUTH_IN_END_STATE(auth) ((auth)->state->handler == NULL)
-
-/**
- * Analyzes buffered input and moves the auth conversation forward,
- * returning the new state of the auth conversation.
- *
- * @param auth the auth conversation
- * @returns the new state
- */
-DBusAuthState
-_dbus_auth_do_work (DBusAuth *auth)
-{
- auth->needed_memory = FALSE;
-
- /* Max amount we'll buffer up before deciding someone's on crack */
-#define MAX_BUFFER (16 * _DBUS_ONE_KILOBYTE)
-
- do
- {
- if (DBUS_AUTH_IN_END_STATE (auth))
- break;
-
- if (_dbus_string_get_length (&auth->incoming) > MAX_BUFFER ||
- _dbus_string_get_length (&auth->outgoing) > MAX_BUFFER)
- {
- goto_state (auth, &common_state_need_disconnect);
- _dbus_verbose ("%s: Disconnecting due to excessive data buffered in auth phase\n",
- DBUS_AUTH_NAME (auth));
- break;
- }
- }
- while (process_command (auth));
-
- if (auth->needed_memory)
- return DBUS_AUTH_STATE_WAITING_FOR_MEMORY;
- else if (_dbus_string_get_length (&auth->outgoing) > 0)
- return DBUS_AUTH_STATE_HAVE_BYTES_TO_SEND;
- else if (auth->state == &common_state_need_disconnect)
- return DBUS_AUTH_STATE_NEED_DISCONNECT;
- else if (auth->state == &common_state_authenticated)
- return DBUS_AUTH_STATE_AUTHENTICATED;
- else return DBUS_AUTH_STATE_WAITING_FOR_INPUT;
-}
-
-/**
- * Gets bytes that need to be sent to the peer we're conversing with.
- * After writing some bytes, _dbus_auth_bytes_sent() must be called
- * to notify the auth object that they were written.
- *
- * @param auth the auth conversation
- * @param str return location for a ref to the buffer to send
- * @returns #FALSE if nothing to send
- */
-dbus_bool_t
-_dbus_auth_get_bytes_to_send (DBusAuth *auth,
- const DBusString **str)
-{
- _dbus_assert (auth != NULL);
- _dbus_assert (str != NULL);
-
- *str = NULL;
-
- if (_dbus_string_get_length (&auth->outgoing) == 0)
- return FALSE;
-
- *str = &auth->outgoing;
-
- return TRUE;
-}
-
-/**
- * Notifies the auth conversation object that
- * the given number of bytes of the outgoing buffer
- * have been written out.
- *
- * @param auth the auth conversation
- * @param bytes_sent number of bytes written out
- */
-void
-_dbus_auth_bytes_sent (DBusAuth *auth,
- int bytes_sent)
-{
- _dbus_verbose ("%s: Sent %d bytes of: %s\n",
- DBUS_AUTH_NAME (auth),
- bytes_sent,
- _dbus_string_get_const_data (&auth->outgoing));
-
- _dbus_string_delete (&auth->outgoing,
- 0, bytes_sent);
-}
-
-/**
- * Get a buffer to be used for reading bytes from the peer we're conversing
- * with. Bytes should be appended to this buffer.
- *
- * @param auth the auth conversation
- * @param buffer return location for buffer to append bytes to
- */
-void
-_dbus_auth_get_buffer (DBusAuth *auth,
- DBusString **buffer)
-{
- _dbus_assert (auth != NULL);
- _dbus_assert (!auth->buffer_outstanding);
-
- *buffer = &auth->incoming;
-
- auth->buffer_outstanding = TRUE;
-}
-
-/**
- * Returns a buffer with new data read into it.
- *
- * @param auth the auth conversation
- * @param buffer the buffer being returned
- * @param bytes_read number of new bytes added
- */
-void
-_dbus_auth_return_buffer (DBusAuth *auth,
- DBusString *buffer,
- int bytes_read)
-{
- _dbus_assert (buffer == &auth->incoming);
- _dbus_assert (auth->buffer_outstanding);
-
- auth->buffer_outstanding = FALSE;
-}
-
-/**
- * Returns leftover bytes that were not used as part of the auth
- * conversation. These bytes will be part of the message stream
- * instead. This function may not be called until authentication has
- * succeeded.
- *
- * @param auth the auth conversation
- * @param str return location for pointer to string of unused bytes
- */
-void
-_dbus_auth_get_unused_bytes (DBusAuth *auth,
- const DBusString **str)
-{
- if (!DBUS_AUTH_IN_END_STATE (auth))
- return;
-
- *str = &auth->incoming;
-}
-
-
-/**
- * Gets rid of unused bytes returned by _dbus_auth_get_unused_bytes()
- * after we've gotten them and successfully moved them elsewhere.
- *
- * @param auth the auth conversation
- */
-void
-_dbus_auth_delete_unused_bytes (DBusAuth *auth)
-{
- if (!DBUS_AUTH_IN_END_STATE (auth))
- return;
-
- _dbus_string_set_length (&auth->incoming, 0);
-}
-
-/**
- * Called post-authentication, indicates whether we need to encode
- * the message stream with _dbus_auth_encode_data() prior to
- * sending it to the peer.
- *
- * @param auth the auth conversation
- * @returns #TRUE if we need to encode the stream
- */
-dbus_bool_t
-_dbus_auth_needs_encoding (DBusAuth *auth)
-{
- if (auth->state != &common_state_authenticated)
- return FALSE;
-
- if (auth->mech != NULL)
- {
- if (DBUS_AUTH_IS_CLIENT (auth))
- return auth->mech->client_encode_func != NULL;
- else
- return auth->mech->server_encode_func != NULL;
- }
- else
- return FALSE;
-}
-
-/**
- * Called post-authentication, encodes a block of bytes for sending to
- * the peer. If no encoding was negotiated, just copies the bytes
- * (you can avoid this by checking _dbus_auth_needs_encoding()).
- *
- * @param auth the auth conversation
- * @param plaintext the plain text data
- * @param encoded initialized string to where encoded data is appended
- * @returns #TRUE if we had enough memory and successfully encoded
- */
-dbus_bool_t
-_dbus_auth_encode_data (DBusAuth *auth,
- const DBusString *plaintext,
- DBusString *encoded)
-{
- _dbus_assert (plaintext != encoded);
-
- if (auth->state != &common_state_authenticated)
- return FALSE;
-
- if (_dbus_auth_needs_encoding (auth))
- {
- if (DBUS_AUTH_IS_CLIENT (auth))
- return (* auth->mech->client_encode_func) (auth, plaintext, encoded);
- else
- return (* auth->mech->server_encode_func) (auth, plaintext, encoded);
- }
- else
- {
- return _dbus_string_copy (plaintext, 0, encoded,
- _dbus_string_get_length (encoded));
- }
-}
-
-/**
- * Called post-authentication, indicates whether we need to decode
- * the message stream with _dbus_auth_decode_data() after
- * receiving it from the peer.
- *
- * @param auth the auth conversation
- * @returns #TRUE if we need to encode the stream
- */
-dbus_bool_t
-_dbus_auth_needs_decoding (DBusAuth *auth)
-{
- if (auth->state != &common_state_authenticated)
- return FALSE;
-
- if (auth->mech != NULL)
- {
- if (DBUS_AUTH_IS_CLIENT (auth))
- return auth->mech->client_decode_func != NULL;
- else
- return auth->mech->server_decode_func != NULL;
- }
- else
- return FALSE;
-}
-
-
-/**
- * Called post-authentication, decodes a block of bytes received from
- * the peer. If no encoding was negotiated, just copies the bytes (you
- * can avoid this by checking _dbus_auth_needs_decoding()).
- *
- * @todo 1.0? We need to be able to distinguish "out of memory" error
- * from "the data is hosed" error.
- *
- * @param auth the auth conversation
- * @param encoded the encoded data
- * @param plaintext initialized string where decoded data is appended
- * @returns #TRUE if we had enough memory and successfully decoded
- */
-dbus_bool_t
-_dbus_auth_decode_data (DBusAuth *auth,
- const DBusString *encoded,
- DBusString *plaintext)
-{
- _dbus_assert (plaintext != encoded);
-
- if (auth->state != &common_state_authenticated)
- return FALSE;
-
- if (_dbus_auth_needs_decoding (auth))
- {
- if (DBUS_AUTH_IS_CLIENT (auth))
- return (* auth->mech->client_decode_func) (auth, encoded, plaintext);
- else
- return (* auth->mech->server_decode_func) (auth, encoded, plaintext);
- }
- else
- {
- return _dbus_string_copy (encoded, 0, plaintext,
- _dbus_string_get_length (plaintext));
- }
-}
-
-/**
- * Sets credentials received via reliable means from the operating
- * system.
- *
- * @param auth the auth conversation
- * @param credentials the credentials received
- * @returns #FALSE on OOM
- */
-dbus_bool_t
-_dbus_auth_set_credentials (DBusAuth *auth,
- DBusCredentials *credentials)
-{
- _dbus_credentials_clear (auth->credentials);
- return _dbus_credentials_add_credentials (auth->credentials,
- credentials);
-}
-
-/**
- * Gets the identity we authorized the client as. Apps may have
- * different policies as to what identities they allow.
- *
- * Returned credentials are not a copy and should not be modified
- *
- * @param auth the auth conversation
- * @returns the credentials we've authorized BY REFERENCE do not modify
- */
-DBusCredentials*
-_dbus_auth_get_identity (DBusAuth *auth)
-{
- if (auth->state == &common_state_authenticated)
- {
- return auth->authorized_identity;
- }
- else
- {
- /* FIXME instead of this, keep an empty credential around that
- * doesn't require allocation or something
- */
- /* return empty credentials */
- _dbus_assert (_dbus_credentials_are_empty (auth->authorized_identity));
- return auth->authorized_identity;
- }
-}
-
-/**
- * Gets the GUID from the server if we've authenticated; gets
- * #NULL otherwise.
- * @param auth the auth object
- * @returns the GUID in ASCII hex format
- */
-const char*
-_dbus_auth_get_guid_from_server (DBusAuth *auth)
-{
- _dbus_assert (DBUS_AUTH_IS_CLIENT (auth));
-
- if (auth->state == &common_state_authenticated)
- return _dbus_string_get_const_data (& DBUS_AUTH_CLIENT (auth)->guid_from_server);
- else
- return NULL;
-}
-
-/**
- * Sets the "authentication context" which scopes cookies
- * with the DBUS_COOKIE_SHA1 auth mechanism for example.
- *
- * @param auth the auth conversation
- * @param context the context
- * @returns #FALSE if no memory
- */
-dbus_bool_t
-_dbus_auth_set_context (DBusAuth *auth,
- const DBusString *context)
-{
- return _dbus_string_replace_len (context, 0, _dbus_string_get_length (context),
- &auth->context, 0, _dbus_string_get_length (context));
-}
-
-/** @} */
-
-/* tests in dbus-auth-util.c */
projects / monky / blobdiff