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/*
* Copyright (c) 2006 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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 "hx_locl.h"
#include <dirent.h>
/*
* The DIR keyset module is strange compared to the other modules
* since it does lazy evaluation and really doesn't keep any local
* state except for the directory iteration and cert iteration of
* files. DIR ignores most errors so that the consumer doesn't get
* failes for stray files in directories.
*/
struct dircursor {
DIR *dir;
hx509_certs certs;
void *iter;
};
/*
*
*/
static int
dir_init(hx509_context context,
hx509_certs certs, void **data, int flags,
const char *residue, hx509_lock lock)
{
*data = NULL;
{
struct stat sb;
int ret;
ret = stat(residue, &sb);
if (ret == -1) {
hx509_set_error_string(context, 0, ENOENT,
"No such file %s", residue);
return ENOENT;
}
if (!S_ISDIR(sb.st_mode)) {
hx509_set_error_string(context, 0, ENOTDIR,
"%s is not a directory", residue);
return ENOTDIR;
}
}
*data = strdup(residue);
if (*data == NULL) {
hx509_clear_error_string(context);
return ENOMEM;
}
return 0;
}
static int
dir_free(hx509_certs certs, void *data)
{
free(data);
return 0;
}
static int
dir_iter_start(hx509_context context,
hx509_certs certs, void *data, void **cursor)
{
struct dircursor *d;
*cursor = NULL;
d = calloc(1, sizeof(*d));
if (d == NULL) {
hx509_clear_error_string(context);
return ENOMEM;
}
d->dir = opendir(data);
if (d->dir == NULL) {
hx509_clear_error_string(context);
free(d);
return errno;
}
rk_cloexec(dirfd(d->dir));
d->certs = NULL;
d->iter = NULL;
*cursor = d;
return 0;
}
static int
dir_iter(hx509_context context,
hx509_certs certs, void *data, void *iter, hx509_cert *cert)
{
struct dircursor *d = iter;
int ret = 0;
*cert = NULL;
do {
struct dirent *dir;
char *fn;
if (d->certs) {
ret = hx509_certs_next_cert(context, d->certs, d->iter, cert);
if (ret) {
hx509_certs_end_seq(context, d->certs, d->iter);
d->iter = NULL;
hx509_certs_free(&d->certs);
return ret;
}
if (*cert) {
ret = 0;
break;
}
hx509_certs_end_seq(context, d->certs, d->iter);
d->iter = NULL;
hx509_certs_free(&d->certs);
}
dir = readdir(d->dir);
if (dir == NULL) {
ret = 0;
break;
}
if (strcmp(dir->d_name, ".") == 0 || strcmp(dir->d_name, "..") == 0)
continue;
if (asprintf(&fn, "FILE:%s/%s", (char *)data, dir->d_name) == -1)
return ENOMEM;
ret = hx509_certs_init(context, fn, 0, NULL, &d->certs);
if (ret == 0) {
ret = hx509_certs_start_seq(context, d->certs, &d->iter);
if (ret)
hx509_certs_free(&d->certs);
}
/* ignore errors */
if (ret) {
d->certs = NULL;
ret = 0;
}
free(fn);
} while(ret == 0);
return ret;
}
static int
dir_iter_end(hx509_context context,
hx509_certs certs,
void *data,
void *cursor)
{
struct dircursor *d = cursor;
if (d->certs) {
hx509_certs_end_seq(context, d->certs, d->iter);
d->iter = NULL;
hx509_certs_free(&d->certs);
}
closedir(d->dir);
free(d);
return 0;
}
static struct hx509_keyset_ops keyset_dir = {
"DIR",
0,
dir_init,
NULL,
dir_free,
NULL,
NULL,
dir_iter_start,
dir_iter,
dir_iter_end
};
void
_hx509_ks_dir_register(hx509_context context)
{
_hx509_ks_register(context, &keyset_dir);
}
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