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      1 /*	$NetBSD: dumpdata.c,v 1.2 2017/01/28 21:31:50 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2005 Kungliga Tekniska Hgskolan
      5  * (Royal Institute of Technology, Stockholm, Sweden).
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. Neither the name of the Institute nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <config.h>
     37 
     38 #include <krb5/roken.h>
     39 
     40 /*
     41  * Write datablob to a filename, don't care about errors.
     42  */
     43 
     44 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL
     45 rk_dumpdata (const char *filename, const void *buf, size_t size)
     46 {
     47     int fd;
     48 
     49     fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0640);
     50     if (fd < 0)
     51 	return;
     52     net_write(fd, buf, size);
     53     close(fd);
     54 }
     55 
     56 /*
     57  * Read all data from a filename, care about errors.
     58  */
     59 
     60 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
     61 rk_undumpdata(const char *filename, void **buf, size_t *size)
     62 {
     63     struct stat sb;
     64     int fd, ret;
     65     ssize_t sret;
     66 
     67     *buf = NULL;
     68 
     69     fd = open(filename, O_RDONLY, 0);
     70     if (fd < 0)
     71 	return errno;
     72     if (fstat(fd, &sb) != 0){
     73 	ret = errno;
     74 	goto out;
     75     }
     76     *buf = malloc(sb.st_size);
     77     if (*buf == NULL) {
     78 	ret = ENOMEM;
     79 	goto out;
     80     }
     81     *size = sb.st_size;
     82 
     83     sret = net_read(fd, *buf, *size);
     84     if (sret < 0)
     85 	ret = errno;
     86     else if (sret != (ssize_t)*size)
     87 	ret = EINVAL;
     88     else
     89 	ret = 0;
     90 
     91   out:
     92     if (ret) {
     93 	free(*buf);
     94 	*buf = NULL;
     95     }
     96     close(fd);
     97     return ret;
     98 }
     99