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res_xmpp: Google OAuth 2.0 protocol support for XMPP / Motif

Browse Source 
Add ability to use tokens instead of passwords according to Google OAuth 2.0
protocol.

ASTERISK-27169
Reported by: Andrey Egorov
Tested by: Andrey Egorov

Change-Id: I07f7052a502457ab55010a4d3686653b60f4c8db
pull/9/head
Andrey Egorov 8 years ago committed by Joshua Colp
parent 9c0bdf3b5d
commit 15fbcc74d8
3 changed files with 115 additions and 13 deletions
Show Stats Download Patch File Download Diff File

6
CHANGES
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@ -73,6 +73,12 @@ res_musiconhold
* New dialplan function PJSIP_DTMF_MODE added to get or change the DTMF mode
of a channel on a per-call basis.
res_xmpp
-----------------
* OAuth 2.0 authentication is now supported when contacting Google. Follow the
instructions in xmpp.conf.sample to retrieve and configure the necessary
tokens.
------------------------------------------------------------------------------
--- Functionality changes from Asterisk 14.5.0 to Asterisk 14.6.0 ------------
------------------------------------------------------------------------------

23
configs/samples/xmpp.conf.sample
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@ -18,6 +18,29 @@
;pubsub_node=pubsub.astjab.org ; Node to use for publishing events via PubSub
;username=asterisk@astjab.org/asterisk ; Username with optional resource.
;secret=blah ; Password
;refresh_token=TOKEN_VALUE ; Refresh token issued by Google OAuth 2.0 protocol.
; `secret` must NOT be set if you use OAuth.
; See https://developers.google.com/identity/protocols/OAuth2WebServer
; for more details.
; For test reasons you can obtain one on the page
; https://developers.google.com/oauthplayground/
; 1. Click on Settings icon, check "Use your own OAuth credentials"
; and enter your Client ID and Client Secret (see below).
; 2. Input the scope https://www.googleapis.com/auth/googletalk
; and push "Authorize APIs" button.
; 3. Approve permissions.
; 4. On section "Step 2" push "Exchange authorization code for tokens"
; and get your Refresh token.
;oauth_clientid=OAUTH_CLIENT_ID_VALUE ; The application's client id to authorize using Google OAuth 2.0 protocol.
;oauth_secret=OAUTH_SECRET_VALUE ; The application's client secret to authorize using Google OAuth 2.0 protocol.
; 1. Create new Project on the page:
; https://console.cloud.google.com/apis/credentials/oauthclient
; 2. Create new Application ID on the same page with type Web-application.
; In section "Allowed URI redirections" put the path to the corresponding
; script on your site or https://developers.google.com/oauthplayground
; if you would like to obtain refresh_token from users by hand
; (for example, for test reasons).
; 3. Client ID and Client Secret will be shown and available on the same page.
;priority=1 ; Resource priority
;port=5222 ; Port to use defaults to 5222
;usetls=yes ; Use tls or not

79
res/res_xmpp.c
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@ -59,6 +59,7 @@
#include "asterisk/manager.h"
#include "asterisk/cli.h"
#include "asterisk/config_options.h"
#include "asterisk/json.h"
/*** DOCUMENTATION
<application name="JabberSend" language="en_US" module="res_xmpp">
@ -321,6 +322,15 @@
<configOption name="secret">
<synopsis>XMPP password</synopsis>
</configOption>
<configOption name="refresh_token">
<synopsis>Google OAuth 2.0 refresh token</synopsis>
</configOption>
<configOption name="oauth_clientid">
<synopsis>Google OAuth 2.0 application's client id</synopsis>
</configOption>
<configOption name="oauth_secret">
<synopsis>Google OAuth 2.0 application's secret</synopsis>
</configOption>
<configOption name="serverhost">
<synopsis>Route to server, e.g. talk.google.com</synopsis>
</configOption>
@ -459,6 +469,9 @@ struct ast_xmpp_client_config {
AST_STRING_FIELD(name); /*!< Name of the client connection */
AST_STRING_FIELD(user); /*!< Username to use for authentication */
AST_STRING_FIELD(password); /*!< Password to use for authentication */
AST_STRING_FIELD(refresh_token); /*!< Refresh token to use for OAuth authentication */
AST_STRING_FIELD(oauth_clientid); /*!< Client ID to use for OAuth authentication */
AST_STRING_FIELD(oauth_secret); /*!< Secret to use for OAuth authentication */
AST_STRING_FIELD(server); /*!< Server hostname */
AST_STRING_FIELD(statusmsg); /*!< Status message for presence */
AST_STRING_FIELD(pubsubnode); /*!< Pubsub node */
@ -527,6 +540,7 @@ static ast_cond_t message_received_condition;
static ast_mutex_t messagelock;
static int xmpp_client_config_post_apply(void *obj, void *arg, int flags);
static int fetch_access_token(struct ast_xmpp_client_config *cfg);
/*! \brief Destructor function for configuration */
static void ast_xmpp_client_config_destructor(void *obj)
@ -759,12 +773,16 @@ static int xmpp_config_prelink(void *newitem)
if (ast_strlen_zero(clientcfg->user)) {
ast_log(LOG_ERROR, "No user specified on client '%s'\n", clientcfg->name);
return -1;
} else if (ast_strlen_zero(clientcfg->password)) {
ast_log(LOG_ERROR, "No password specified on client '%s'\n", clientcfg->name);
} else if (ast_strlen_zero(clientcfg->password) && ast_strlen_zero(clientcfg->refresh_token)) {
ast_log(LOG_ERROR, "No password or refresh_token specified on client '%s'\n", clientcfg->name);
return -1;
} else if (ast_strlen_zero(clientcfg->server)) {
ast_log(LOG_ERROR, "No server specified on client '%s'\n", clientcfg->name);
return -1;
} else if (!ast_strlen_zero(clientcfg->refresh_token) &&
(ast_strlen_zero(clientcfg->oauth_clientid) || ast_strlen_zero(clientcfg->oauth_secret))) {
ast_log(LOG_ERROR, "No oauth_clientid or oauth_secret specified, so client '%s' can't be used\n", clientcfg->name);
return -1;
}
/* If this is a new connection force a reconnect */
@ -776,6 +794,9 @@ static int xmpp_config_prelink(void *newitem)
/* If any configuration options are changing that would require reconnecting set the bit so we will do so if possible */
if (strcmp(clientcfg->user, oldclientcfg->user) ||
strcmp(clientcfg->password, oldclientcfg->password) ||
strcmp(clientcfg->refresh_token, oldclientcfg->refresh_token) ||
strcmp(clientcfg->oauth_clientid, oldclientcfg->oauth_clientid) ||
strcmp(clientcfg->oauth_secret, oldclientcfg->oauth_secret) ||
strcmp(clientcfg->server, oldclientcfg->server) ||
(clientcfg->port != oldclientcfg->port) ||
(ast_test_flag(&clientcfg->flags, XMPP_COMPONENT) != ast_test_flag(&oldclientcfg->flags, XMPP_COMPONENT)) ||
@ -2784,7 +2805,13 @@ static int xmpp_client_authenticate_sasl(struct ast_xmpp_client *client, struct
}
iks_insert_attrib(auth, "xmlns", IKS_NS_XMPP_SASL);
iks_insert_attrib(auth, "mechanism", "PLAIN");
if (!ast_strlen_zero(cfg->refresh_token)) {
iks_insert_attrib(auth, "mechanism", "X-OAUTH2");
iks_insert_attrib(auth, "auth:service", "oauth2");
iks_insert_attrib(auth, "xmlns:auth", "http://www.google.com/talk/protocol/auth");
} else {
iks_insert_attrib(auth, "mechanism", "PLAIN");
}
if (strchr(client->jid->user, '/')) {
char *user = ast_strdupa(client->jid->user);
@ -3625,6 +3652,13 @@ static int xmpp_client_reconnect(struct ast_xmpp_client *client)
return -1;
}
if (!ast_strlen_zero(clientcfg->refresh_token)) {
ast_debug(2, "Obtaining OAuth access token for client '%s'\n", client->name);
if (fetch_access_token(clientcfg)) {
return -1;
}
}
ast_xmpp_client_disconnect(client);
client->timeout = 50;
@ -3867,6 +3901,42 @@ static int xmpp_client_config_merge_buddies(void *obj, void *arg, int flags)
return 1;
}
static int fetch_access_token(struct ast_xmpp_client_config *cfg)
{
RAII_VAR(char *, cmd, NULL, ast_free);
char cBuf[1024] = "";
const char *url = "https://www.googleapis.com/oauth2/v3/token";
struct ast_json_error error;
RAII_VAR(struct ast_json *, jobj, NULL, ast_json_unref);
ast_asprintf(&cmd, "CURL(%s,client_id=%s&client_secret=%s&refresh_token=%s&grant_type=refresh_token)",
url, cfg->oauth_clientid, cfg->oauth_secret, cfg->refresh_token);
ast_debug(2, "Performing OAuth 2.0 authentication for client '%s' using command: %s\n",
cfg->name, cmd);
if (!ast_func_read(NULL, cmd, cBuf, sizeof(cBuf) - 1)) {
ast_log(LOG_ERROR, "CURL is unavailable. This is required for OAuth 2.0 authentication of XMPP client '%s'. Please ensure it is loaded.\n",
cfg->name);
return -1;
}
ast_debug(2, "OAuth 2.0 authentication for client '%s' returned: %s\n", cfg->name, cBuf);
jobj = ast_json_load_string(cBuf, &error);
if (jobj) {
const char *token = ast_json_string_get(ast_json_object_get(jobj, "access_token"));
if (token) {
ast_string_field_set(cfg, password, token);
return 0;
}
}
ast_log(LOG_ERROR, "An error occurred while performing OAuth 2.0 authentication for client '%s': %s\n", cfg->name, cBuf);
return -1;
}
static int xmpp_client_config_post_apply(void *obj, void *arg, int flags)
{
struct ast_xmpp_client_config *cfg = obj;
@ -4639,6 +4709,9 @@ static int load_module(void)
aco_option_register(&cfg_info, "username", ACO_EXACT, client_options, NULL, OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_xmpp_client_config, user));
aco_option_register(&cfg_info, "secret", ACO_EXACT, client_options, NULL, OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_xmpp_client_config, password));
aco_option_register(&cfg_info, "refresh_token", ACO_EXACT, client_options, NULL, OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_xmpp_client_config, refresh_token));
aco_option_register(&cfg_info, "oauth_clientid", ACO_EXACT, client_options, NULL, OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_xmpp_client_config, oauth_clientid));
aco_option_register(&cfg_info, "oauth_secret", ACO_EXACT, client_options, NULL, OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_xmpp_client_config, oauth_secret));
aco_option_register(&cfg_info, "serverhost", ACO_EXACT, client_options, NULL, OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_xmpp_client_config, server));
aco_option_register(&cfg_info, "statusmessage", ACO_EXACT, client_options, "Online and Available", OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_xmpp_client_config, statusmsg));
aco_option_register(&cfg_info, "pubsub_node", ACO_EXACT, client_options, NULL, OPT_STRINGFIELD_T, 0, STRFLDSET(struct ast_xmpp_client_config, pubsubnode));

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