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/* $NetBSD: easydiskpasswd.c,v 1.1.1.1 2002/09/19 20:56:57 drochner Exp $ */
/*
* Copyright (c) 2002
* Matthias Drochner. 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
*/
/*
* a tool to unlock a password protected USB "EasyDisk" (3SYSTEM) flash disk
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/scsiio.h>
#include <dev/scsipi/scsipi_all.h>
#include <util.h>
#include <string.h>
#include <fcntl.h>
#include <stdio.h>
#include <err.h>
#include <pwd.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
static int getstatus(int, int *);
static void usage(void);
int main(int, char **);
/* SCSI command 0xff is in the "vendor defined" range */
static const u_char cmd_getstatus[12] = {0xff, 0x01};
static const u_char cmd_putpasswd[12] = {0xff, 0x05, 0x01};
static char passwdbuf[20] = " ";
static const char *defpasswd = "1111";
/*
* status:
* 1: OK, no password
* 5, 7: password unlocked
* 21: password, locked
*/
static int
getstatus(fd, statp)
int fd;
int *statp;
{
int res;
struct scsireq cmd;
char status[1];
bzero(&cmd, sizeof(cmd));
cmd.flags = SCCMD_READ;
cmd.timeout = 10000;
bcopy(cmd_getstatus, &cmd.cmd, 12);
cmd.cmdlen = 12;
cmd.databuf = status;
cmd.datalen = 1;
cmd.senselen = SENSEBUFLEN;
res = ioctl(fd, SCIOCCOMMAND, &cmd);
if (res < 0)
err(2, "SCIOCCOMMAND");
if (cmd.retsts == SCCMD_SENSE)
return (EINVAL);
else if (cmd.retsts != SCCMD_OK)
return (EIO);
*statp = (unsigned char)status[0];
return (0);
}
static void
usage()
{
fprintf(stderr, "%s [ -d | -p <passwd> ] disk\n", getprogname());
exit(1);
}
int
main(argc, argv)
int argc;
char **argv;
{
int ch, fd, res, status;
char pathbuf[MAXPATHLEN];
const char *passwd = 0;
struct scsireq cmd;
struct scsipi_sense_data *sd;
while ((ch = getopt(argc, argv, "dp:")) != -1)
switch (ch) {
case 'd':
passwd = defpasswd;
break;
case 'p':
passwd = optarg;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
fd = opendisk(argv[0], O_RDWR, pathbuf, MAXPATHLEN, 0);
if (fd < 0)
err(2, "opendisk %s", argv[0]);
res = getstatus(fd, &status);
if (res)
errx(2, "wrong device");
if (status != 21) {
warnx("no password set, or unlocked");
exit (0);
}
if (!passwd)
passwd = getpass("flash disk password: ");
bcopy(passwd, passwdbuf, MIN(strlen(passwd), 20));
bzero(&cmd, sizeof(cmd));
cmd.flags = SCCMD_WRITE;
cmd.timeout = 10000;
bcopy(cmd_putpasswd, &cmd.cmd, 12);
cmd.cmdlen = 12;
cmd.databuf = passwdbuf;
cmd.datalen = 20;
cmd.datalen_used = 20;
cmd.senselen = SENSEBUFLEN;
res = ioctl(fd, SCIOCCOMMAND, &cmd);
if (res < 0)
err(2, "SCIOCCOMMAND");
if (cmd.retsts == SCCMD_SENSE) {
sd = (struct scsipi_sense_data *)&cmd.sense;
if ((sd->flags & SSD_KEY) == SKEY_ILLEGAL_REQUEST) {
if (sd->add_sense_code == 0x24)
errx(3, "wrong password");
if (sd->add_sense_code == 0x20) {
/* XXX shouldn't get here (caught above) */
warnx("no password set");
exit (0);
}
}
errx(2, "SCSI command error");
} else if (cmd.retsts != SCCMD_OK)
errx(2, "scsi driver error %d", cmd.retsts);
return (0);
}
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