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/*
* ========================================================================
* Copyright 2013-2020 Eduardo Chappa
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* ========================================================================
*/
/* OAUTH2 support code goes here. This is necessary because
* 1. it helps to coordinate two different methods, such as XOAUTH2 and
* OAUTHBEARER, which use the same code, so it can all go in one place
*
* 2. It helps with coordinating with the client when the server requires
* the deviceinfo method.
*/
#include "http.h"
#include "json.h"
#include "oauth2_aux.h"
/* we generate something like a guid, but not care about
* anything, but that it is really random.
*/
char *oauth2_generate_state(void)
{
char rv[37];
int i;
rv[0] = '\0';
for(i = 0; i < 4; i++)
sprintf(rv + strlen(rv), "%x", (unsigned int) (random() % 256));
sprintf(rv + strlen(rv), "%c", '-');
for(i = 0; i < 2; i++)
sprintf(rv + strlen(rv), "%x", (unsigned int) (random() % 256));
sprintf(rv + strlen(rv), "%c", '-');
for(i = 0; i < 2; i++)
sprintf(rv + strlen(rv), "%x", (unsigned int) (random() % 256));
sprintf(rv + strlen(rv), "%c", '-');
for(i = 0; i < 2; i++)
sprintf(rv + strlen(rv), "%x", (unsigned int) (random() % 256));
sprintf(rv + strlen(rv), "%c", '-');
for(i = 0; i < 6; i++)
sprintf(rv + strlen(rv), "%x", (unsigned int) (random() % 256));
rv[36] = '\0';
return cpystr(rv);
}
JSON_S *oauth2_json_reply(OAUTH2_SERVER_METHOD_S, OAUTH2_S *, int *);
#define LOAD_HTTP_PARAMS(X, Y) { \
int i; \
for(i = 0; (X).params[i] != OA2_End; i++){ \
OA2_type j = (X).params[i]; \
(Y)[i].name = oauth2->param[j].name; \
(Y)[i].value = oauth2->param[j].value; \
} \
(Y)[i].name = (Y)[i].value = NULL; \
}
JSON_S *oauth2_json_reply(OAUTH2_SERVER_METHOD_S RefreshMethod, OAUTH2_S *oauth2, int *status)
{
JSON_S *json = NULL;
HTTP_PARAM_S params[OAUTH2_PARAM_NUMBER];
unsigned char *s;
LOAD_HTTP_PARAMS(RefreshMethod, params);
*status = 0;
if(strcmp(RefreshMethod.name, "POST") == 0
&& ((s = http_post_param(RefreshMethod.urlserver, params, status)) != NULL)){
unsigned char *u = s;
json = json_parse(&u);
fs_give((void **) &s);
}
return json;
}
void
mm_login_oauth2_c_client_method (NETMBX *mb, char *user, char *method,
OAUTH2_S *oauth2, unsigned long trial, int *tryanother)
{
int i, status;
char *s = NULL;
JSON_S *json = NULL;
if(oauth2->param[OA2_Id].value == NULL
|| (oauth2->require_secret && oauth2->param[OA2_Secret].value == NULL)){
oauth2clientinfo_t ogci =
(oauth2clientinfo_t) mail_parameters (NIL, GET_OA2CLIENTINFO, NIL);
if(ogci) (*ogci)(oauth2->name, &oauth2->param[OA2_Id].value,
&oauth2->param[OA2_Secret].value);
}
if(oauth2->param[OA2_Id].value == NULL
|| (oauth2->require_secret && oauth2->param[OA2_Secret].value == NULL))
return;
/* Do we have a method to execute? */
if (oauth2->first_time && oauth2->server_mthd[OA2_GetDeviceCode].name){
oauth2deviceinfo_t ogdi;
json = oauth2_json_reply(oauth2->server_mthd[OA2_GetDeviceCode], oauth2, &status);
if(json != NULL){
JSON_X *jx;
jx = json_body_value(json, "device_code");
if(jx && jx->jtype == JString)
oauth2->devicecode.device_code = cpystr((char *) jx->value);
jx = json_body_value(json, "user_code");
if(jx && jx->jtype == JString)
oauth2->devicecode.user_code = cpystr((char *) jx->value);
jx = json_body_value(json, "verification_uri");
if(jx && jx->jtype == JString)
oauth2->devicecode.verification_uri = cpystr((char *) jx->value);
if((jx = json_body_value(json, "expires_in")) != NULL)
switch(jx->jtype){
case JString: oauth2->devicecode.expires_in = atoi((char *) jx->value);
break;
case JLong : oauth2->devicecode.expires_in = *(long *) jx->value;
break;
}
if((jx = json_body_value(json, "interval")) != NULL)
switch(jx->jtype){
case JString: oauth2->devicecode.interval = atoi((char *) jx->value);
break;
case JLong : oauth2->devicecode.interval = *(long *) jx->value;
break;
}
jx = json_body_value(json, "message");
if(jx && jx->jtype == JString)
oauth2->devicecode.message = cpystr((char *) jx->value);
json_free(&json);
if(oauth2->devicecode.verification_uri && oauth2->devicecode.user_code){
ogdi = (oauth2deviceinfo_t) mail_parameters (NIL, GET_OA2DEVICEINFO, NIL);
if(ogdi) (*ogdi)(oauth2, method);
}
}
return;
}
/* else check if we have a refresh token, and in that case use it */
if(oauth2->param[OA2_RefreshToken].value){
json = oauth2_json_reply(oauth2->server_mthd[OA2_GetAccessTokenFromRefreshToken], oauth2, &status);
if(json != NULL){
JSON_X *jx;
jx = json_body_value(json, "access_token");
if(jx && jx->jtype == JString)
oauth2->access_token = cpystr((char *) jx->value);
if((jx = json_body_value(json, "expires_in")) != NULL)
switch(jx->jtype){
case JString: oauth2->expiration = time(0) + atol((char *) jx->value);
break;
case JLong : oauth2->expiration = time(0) + *(long *) jx->value;
break;
}
json_free(&json);
}
return;
}
/*
* else, we do not have a refresh token, nor an access token.
* We need to start the process to get an access code. We use this
* to get an access token and refresh token.
*/
{ OAUTH2_SERVER_METHOD_S RefreshMethod = oauth2->server_mthd[OA2_GetAccessCode];
HTTP_PARAM_S params[OAUTH2_PARAM_NUMBER];
LOAD_HTTP_PARAMS(RefreshMethod, params);
if(strcmp(RefreshMethod.name, "GET") == 0){
char *url = http_get_param_url(RefreshMethod.urlserver, params);
oauth2getaccesscode_t ogac =
(oauth2getaccesscode_t) mail_parameters (NIL, GET_OA2CLIENTGETACCESSCODE, NIL);
if(ogac)
oauth2->param[OA2_Code].value = (*ogac)(url, method, oauth2, tryanother);
}
if(oauth2->param[OA2_Code].value){
json = oauth2_json_reply(oauth2->server_mthd[OA2_GetAccessTokenFromAccessCode], oauth2, &status);
if(json != NULL){
JSON_X *jx;
switch(status){
case HTTP_OK : jx = json_body_value(json, "refresh_token");
if(jx && jx->jtype == JString)
oauth2->param[OA2_RefreshToken].value = cpystr((char *) jx->value);
jx = json_body_value(json, "access_token");
if(jx && jx->jtype == JString)
oauth2->access_token = cpystr((char *) jx->value);
if((jx = json_body_value(json, "expires_in")) != NULL)
switch(jx->jtype){
case JString: oauth2->expiration = time(0) + atol((char *) jx->value);
break;
case JLong : oauth2->expiration = time(0) + *(long *) jx->value;
break;
}
jx = json_body_value(json, "expires_in");
if(jx && jx->jtype == JString)
oauth2->expiration = time(0) + atol((char *) jx->value);
break;
case HTTP_BAD : break;
default : { char tmp[100];
sprintf(tmp, "Oauth Client Received Code %d", status);
fatal (tmp);
}
}
json_free(&json);
}
}
return;
}
/* Else, does this server use the /devicecode method? */
}
void oauth2deviceinfo_get_accesscode(void *inp, void *outp)
{
OAUTH2_DEVICEPROC_S *oad = (OAUTH2_DEVICEPROC_S *) inp;
OAUTH2_S *oauth2 = oad->xoauth2;
OAUTH2_DEVICECODE_S *dcode = &oauth2->devicecode;
int done = 0, status, rv;
HTTP_PARAM_S params[OAUTH2_PARAM_NUMBER];
JSON_S *json;
if(dcode->device_code && oauth2->param[OA2_DeviceCode].value == NULL)
oauth2->param[OA2_DeviceCode].value = cpystr(dcode->device_code);
rv = OA2_CODE_WAIT; /* wait by default */
json = oauth2_json_reply(oauth2->server_mthd[OA2_GetAccessTokenFromAccessCode], oauth2, &status);
if(json != NULL){
JSON_X *jx;
char *error;
switch(status){
case HTTP_BAD : jx = json_body_value(json, "error");
if(jx && jx->jtype == JString)
error = cpystr((char *) jx->value);
else
break;
if(compare_cstring(error, "authorization_pending") == 0)
rv = OA2_CODE_WAIT;
else if(compare_cstring(error, "authorization_declined") == 0)
rv = OA2_CODE_FAIL;
else if(compare_cstring(error, "bad_verification_code") == 0)
rv = OA2_CODE_FAIL;
else if(compare_cstring(error, "expired_token") == 0)
rv = OA2_CODE_FAIL;
else /* keep waiting? */
rv = OA2_CODE_WAIT;
break;
case HTTP_OK : jx = json_body_value(json, "refresh_token");
if(jx && jx->jtype == JString)
oauth2->param[OA2_RefreshToken].value = cpystr((char *) jx->value);
jx = json_body_value(json, "access_token");
if(jx && jx->jtype == JString)
oauth2->access_token = cpystr((char *) jx->value);
if((jx = json_body_value(json, "expires_in")) != NULL)
switch(jx->jtype){
case JString: oauth2->expiration = time(0) + atol((char *) jx->value);
break;
case JLong : oauth2->expiration = time(0) + *(long *) jx->value;
break;
}
rv = OA2_CODE_SUCCESS;
break;
default : { char tmp[100];
sprintf(tmp, "Oauth device Received Code %d", status);
fatal (tmp);
}
}
json_free(&json);
}
*(int *)outp = rv;
}
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