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isasl.c
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isasl.c
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/* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright (C) 2010-2012 Couchbase, Inc
* All rights reserved.
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "isasl.h"
#include <string.h>
#include <stdlib.h>
struct sasl_conn {
const sasl_callback_t *callbacks;
char *userdata;
};
static const char *plain = "PLAIN";
int sasl_client_new(const char *service,
const char *serverFQDN,
const char *iplocalport,
const char *ipremoteport,
const sasl_callback_t *prompt_supp,
unsigned flags,
sasl_conn_t **pconn)
{
struct sasl_conn *conn = calloc(1, sizeof(*conn));
if (conn == NULL) {
return SASL_ERROR;
}
conn->callbacks = prompt_supp;
*pconn = conn;
(void)service;
(void)serverFQDN;
(void)iplocalport;
(void)ipremoteport;
(void)flags;
return SASL_OK;
}
void sasl_dispose(sasl_conn_t **pconn)
{
free((*pconn)->userdata);
free(*pconn);
*pconn = NULL;
}
int sasl_client_start(sasl_conn_t *conn,
const char *mechlist,
void **prompt_need,
const char **clientout,
unsigned int *clientoutlen,
const char **mech)
{
const char *usernm = NULL;
unsigned int usernmlen;
int i = 0;
int found = 0;
sasl_secret_t *pass;
if (strstr(mechlist, "PLAIN") == NULL) {
return SASL_ERROR;
}
*mech = plain;
/* get the username: */
while (conn->callbacks[i].id != SASL_CB_LIST_END) {
if (conn->callbacks[i].id == SASL_CB_USER) {
int r;
union {
int (*get)(void *, int, const char **, unsigned int *);
int (*proc)(void);
} hack;
hack.proc = conn->callbacks[i].proc;
r = hack.get(conn->callbacks[i].context, SASL_CB_USER,
&usernm, &usernmlen);
if (r != SASL_OK) {
return r;
}
found = 1;
break;
}
++i;
}
if (!found) {
return SASL_ERROR;
}
found = 0;
i = 0;
while (conn->callbacks[i].id != SASL_CB_LIST_END) {
if (conn->callbacks[i].id == SASL_CB_PASS) {
int r;
union {
int (*get)(sasl_conn_t *, void *, int, sasl_secret_t **);
int (*proc)(void);
} hack;
hack.proc = conn->callbacks[i].proc;
r = hack.get(conn, conn->callbacks[i].context, SASL_CB_PASS,
&pass);
if (r != SASL_OK) {
return r;
}
found = 1;
break;
}
++i;
}
if (!found) {
return SASL_ERROR;
}
conn->userdata = calloc(usernmlen + 1 + pass->len + 1, 1);
if (conn->userdata == NULL) {
return SASL_ERROR;
}
memcpy(conn->userdata + 1, usernm, usernmlen);
memcpy(conn->userdata + usernmlen + 2, pass->data, pass->len);
*clientout = conn->userdata;
*clientoutlen = (unsigned int)(usernmlen + 2 + pass->len);
(void)prompt_need;
return SASL_OK;
}
void sasl_done(void)
{
}
int sasl_client_step(sasl_conn_t *a, const void *b, unsigned int c,
void *d, const void *e, void *f)
{
(void)a;
(void)b;
(void)c;
(void)d;
(void)e;
(void)f;
return SASL_ERROR;
}
int sasl_client_init(const sasl_callback_t *callbacks)
{
(void)callbacks;
return SASL_OK;
}