/*
* Copyright (c) 2001-2002 Packet Design, LLC.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty,
* use and redistribution of this software, in source or object code
* forms, with or without modifications are expressly permitted by
* Packet Design; provided, however, that:
*
* (i) Any and all reproductions of the source or object code
* must include the copyright notice above and the following
* disclaimer of warranties; and
* (ii) No rights are granted, in any manner or form, to use
* Packet Design trademarks, including the mark "PACKET DESIGN"
* on advertising, endorsements, or otherwise except as such
* appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
* THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
* OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
* OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
* OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
* RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
* LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
* OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
* DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
* USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER 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 PACKET DESIGN IS ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* Author: Archie Cobbs <archie@freebsd.org>
*/
#include "ppp/ppp_defs.h"
#include "ppp/ppp_util.h"
#define PATH_RANDOM "/dev/urandom"
/*
* Decode ASCII message
*/
void
ppp_util_ascify(char *buf, size_t bsiz, const u_char *data, size_t len)
{
char *bp = buf;
int i;
for (bp = buf, i = 0; i < len; i++) {
const char ch = (char)data[i];
if (bsiz < 3)
break;
switch (ch) {
case '\t':
*bp++ = '\\';
*bp++ = 't';
bsiz -= 2;
break;
case '\n':
*bp++ = '\\';
*bp++ = 'n';
bsiz -= 2;
break;
case '\r':
*bp++ = '\\';
*bp++ = 'r';
bsiz -= 2;
break;
default:
if (isprint(ch & 0x7f)) {
*bp++ = ch;
bsiz--;
} else {
*bp++ = '^';
*bp++ = '@' + (ch & 0x1f);
bsiz -= 2;
}
break;
}
}
*bp = '\0';
}
/*
* Generate random bytes
*/
int
ppp_util_random(void *buf, size_t len)
{
int rlen;
int fd;
if ((fd = open(PATH_RANDOM, O_RDONLY)) == -1)
return (-1);
rlen = read(fd, buf, len);
(void)close(fd);
if (rlen == -1)
return (-1);
if (rlen != len) {
errno = ENXIO;
return (-1);
}
return (0);
}
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