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/* $NetBSD: saslc.c,v 1.4 2011/02/12 23:21:32 christos Exp $ */
/* Copyright (c) 2010 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Mateusz Kocielski.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: saslc.c,v 1.4 2011/02/12 23:21:32 christos Exp $");
#include <assert.h>
#include <ctype.h>
#include <saslc.h>
#include <stdbool.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include "crypto.h" /* XXX: for saslc_{de,en}code64() */
#include "dict.h"
#include "error.h"
#include "mech.h"
#include "msg.h"
#include "parser.h"
#include "saslc_private.h"
/**
* @brief check for a valid application name (no path separator)
* @param appname application name
* @return true if application name is valid, false otherwise
*/
static bool
saslc__valid_appname(const char *appname)
{
const char *p;
for (p = appname; *p; p++)
if (*p == '/')
return false;
return true;
}
/**
* @brief allocates new saslc context
* @return pointer to the saslc context
*/
saslc_t *
saslc_alloc(void)
{
/* XXX: Check this as early as possible. */
saslc_debug = getenv(SASLC_ENV_DEBUG) != NULL;
return calloc(1, sizeof(saslc_t));
}
/**
* @brief initializes sasl context, basing on application name function
* parses configuration files, sets up default properties and creates
* mechanisms list for the context.
* @param ctx sasl context
* @param appname application name, NULL could be used for generic aplication
* @param pathname location of config files. if NULL, use environment or default
* @return 0 on success, -1 otherwise.
*/
int
saslc_init(saslc_t *ctx, const char *appname, const char *pathname)
{
/* ctx is already zeroed by saslc_alloc(). */
ctx->prop = saslc__dict_create();
if (appname != NULL) {
if (saslc__valid_appname(appname) == false) {
saslc__error_set(ERR(ctx), ERROR_BADARG,
"application name is not permited");
goto error;
}
if ((ctx->appname = strdup(appname)) == NULL) {
saslc__error_set_errno(ERR(ctx), ERROR_NOMEM);
goto error;
}
}
if (pathname != NULL && *pathname != '\0') {
if ((ctx->pathname = strdup(pathname)) == NULL) {
saslc__error_set_errno(ERR(ctx), ERROR_NOMEM);
goto error;
}
}
ctx->mechanisms = saslc__mech_list_create(ctx);
if (ctx->mechanisms == NULL)
goto error;
/* load the global and mechanism dictionaries */
if (saslc__parser_config(ctx) == -1) {
free(ctx->appname);
ctx->appname = NULL;
saslc__dict_destroy(ctx->prop);
ctx->prop = NULL;
saslc__mech_list_destroy(ctx->mechanisms);
ctx->mechanisms = NULL;
return -1;
}
return 0;
error:
if (ctx->pathname != NULL) {
free(ctx->pathname);
ctx->pathname = NULL;
}
if (ctx->appname != NULL) {
free(ctx->appname);
ctx->appname = NULL;
}
free(ctx->prop);
ctx->prop = NULL;
return -1;
}
/**
* @brief gets string message of last error.
* @param ctx context
* @return pointer to the error message.
*/
const char *
saslc_strerror(saslc_t *ctx)
{
return saslc__error_get_strerror(ERR(ctx));
}
/**
* @brief destroys and deallocate resources used by the context.
* @param ctx context
* the context (if any) should be destroyed
* @return 0 on success, -1 on failure
*/
int
saslc_end(saslc_t *ctx)
{
if (ctx->refcnt > 0) {
saslc__error_set(ERR(ctx), ERROR_GENERAL,
"context has got assigned active sessions");
return -1;
}
if (ctx->mechanisms != NULL)
saslc__mech_list_destroy(ctx->mechanisms);
if (ctx->prop != NULL)
saslc__dict_destroy(ctx->prop);
free(ctx->appname);
free(ctx);
return 0;
}
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