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/*
File: hpa_dco.c
Copyright (C) 2008 Christophe GRENIER <grenier@cgsecurity.org>
This software is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#if defined(DISABLED_FOR_FRAMAC)
#undef HAVE_LINUX_TYPES_H
#undef HAVE_LINUX_HDREG_H
#undef HAVE_SCSI_SG_H
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* lseek, read, write, close */
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h> /* open */
#endif
#include <stdio.h>
#include "types.h"
#if defined(HAVE_LINUX_TYPES_H)
#include <linux/types.h>
#endif
#include "common.h"
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#if defined(HAVE_LINUX_HDREG_H)
#include <linux/hdreg.h>
#endif
#ifdef HAVE_FNCTL_H
#include <fnctl.h>
#endif
#if defined(HAVE_SCSI_SG_H)
#include <scsi/sg.h>
#endif
#include "log.h"
#include "hpa_dco.h"
#define DISK_HAS_48_SUPPORT 0x01
#define DISK_HAS_HPA_SUPPORT 0x02
#define DISK_HAS_REMOVABLE_SUPPORT 0x04
#define DISK_HAS_DCO_SUPPORT 0x08
#define IDE_STATUS_OFFSET 7
#define SG_ATA_PROTO_NON_DATA ( 3 << 1)
#define SG_ATA_PROTO_PIO_IN ( 4 << 1)
#define SG_ATA_PROTO_PIO_OUT ( 5 << 1)
#define SG_ATA_LBA48 1
#define SG_DRIVER_SENSE 0x08
#define SG_CHECK_CONDITION 0x02
enum {
SG_CDB2_TLEN_NODATA = 0 << 0,
SG_CDB2_TLEN_FEAT = 1 << 0,
SG_CDB2_TLEN_NSECT = 2 << 0,
SG_CDB2_TLEN_BYTES = 0 << 2,
SG_CDB2_TLEN_SECTORS = 1 << 2,
SG_CDB2_TDIR_TO_DEV = 0 << 3,
SG_CDB2_TDIR_FROM_DEV = 1 << 3,
SG_CDB2_CHECK_COND = 1 << 5
};
#ifndef WIN_READ_NATIVE_MAX
#define WIN_READ_NATIVE_MAX 0xF8 /* return the native maximum address */
#endif
#ifndef WIN_READ_NATIVE_MAX_EXT
#define WIN_READ_NATIVE_MAX_EXT 0x27 /* 48-Bit */
#endif
#ifndef IDE_DRIVE_TASK_NO_DATA
#define IDE_DRIVE_TASK_NO_DATA 0
#endif
#ifdef DEBUG_HPA_DCO
static void dump_bytes(const char *prefix, const unsigned char *p, const unsigned int len)
{
unsigned int i;
if (prefix)
log_info("%s: ", prefix);
for (i = 0; i < len; i++)
log_info(" %02x", p[i]);
log_info("\n");
}
#endif
#ifdef HDIO_DRIVE_CMD
static uint64_t read_native_max(int fd)
{
#ifdef HDIO_DRIVE_TASK
unsigned char task_args[7];
task_args[0] = WIN_READ_NATIVE_MAX;
task_args[1] = 0x00;
task_args[2] = 0x00;
task_args[3] = 0x00;
task_args[4] = 0x00;
task_args[5] = 0x00;
task_args[6] = 0x40;
if (ioctl(fd, HDIO_DRIVE_TASK, &task_args))
{
return 0;
}
return ((task_args[6] & 0xf) << 24) +
(task_args[5] << 16) +
(task_args[4] << 8) + task_args[3];
#else
return 0;
#endif
}
static uint64_t sg_read_native_max_ext(int fd)
{
#ifdef SG_IO
unsigned char cdb[16];
unsigned char sb[32];
sg_io_hdr_t io_hdr;
const unsigned char *desc= (const unsigned char*)(sb + 8);
const uint16_t *word=(const uint16_t*)(sb + 10);
memset(&cdb, 0, sizeof(cdb));
cdb[ 0] = 0x85;
cdb[ 1] = SG_ATA_PROTO_NON_DATA;
cdb[ 2] = SG_CDB2_CHECK_COND;
cdb[13] = 0x40; // dev; ATA_USING_LBA
cdb[14] = WIN_READ_NATIVE_MAX_EXT; // command;
cdb[ 1] |= SG_ATA_LBA48;
memset(&sb, 0, sizeof(sb));
memset(&io_hdr, 0, sizeof(io_hdr));
io_hdr.interface_id = 'S';
io_hdr.cmd_len = sizeof(cdb);
io_hdr.mx_sb_len = sizeof(sb);
io_hdr.dxfer_direction= SG_DXFER_NONE;
io_hdr.dxfer_len = 0;
io_hdr.dxferp = NULL;
io_hdr.cmdp = cdb;
io_hdr.sbp = sb;
io_hdr.pack_id = 0;
io_hdr.timeout = 1000; /* msecs */
#ifdef DEBUG_HPA_DCO
log_info("sg_read_native_max_ext\n");
dump_bytes("outgoing cdb", cdb, sizeof(cdb));
#endif
if (ioctl(fd, SG_IO, &io_hdr) == -1) {
return 0; /* SG_IO not supported */
}
#ifdef DEBUG_HPA_DCO
log_info("SG_IO: ATA_%u status=0x%x, host_status=0x%x, driver_status=0x%x\n",
io_hdr.cmd_len, io_hdr.status, io_hdr.host_status, io_hdr.driver_status);
dump_bytes("SG_IO: sb[]", sb, sizeof(sb));
dump_bytes("SG_IO: desc[]", desc, (desc[1] < sizeof(sb) - 8 -2 ? desc[1] : sizeof(sb) - 8 - 2));
#endif
if (io_hdr.host_status || io_hdr.driver_status != SG_DRIVER_SENSE
|| (io_hdr.status && io_hdr.status != SG_CHECK_CONDITION))
return 0;
if (sb[0] != 0x72 || sb[7] < 14 || desc[0] != 9 || desc[1] < 12)
return 0;
return ((uint64_t)word[2]>>8) | (((uint64_t)word[3]>>8)<<8) | (((uint64_t)word[4]>>8)<<16) |
((uint64_t)(word[2]&0xff)<<24) | (((uint64_t)word[3]&0xff)<<32) | (((uint64_t)word[4]&0xff)<<48);
#else
return 0;
#endif
}
static uint64_t sg_device_configuration_identify(int fd)
{
#ifdef SG_IO
unsigned char data[512];
unsigned char sb[32];
unsigned char cdb[16];
uint64_t hdsize;
unsigned int i;
unsigned int sum=0;
uint16_t *word=(uint16_t*)&data;
sg_io_hdr_t io_hdr;
memset(&cdb, 0, sizeof(cdb));
memset(&sb, 0, sizeof(sb));
memset(&io_hdr, 0, sizeof(io_hdr));
memset(&data, 0, sizeof(data));
cdb[ 0] = 0x85;
cdb[ 1] = SG_ATA_PROTO_PIO_IN;
cdb[ 2] = SG_CDB2_CHECK_COND;
cdb[ 2] |= SG_CDB2_TLEN_NSECT | SG_CDB2_TLEN_SECTORS;
cdb[ 2] |= SG_CDB2_TDIR_FROM_DEV;
cdb[ 4] = 0xC2; /* Device Configuration Identify */
cdb[ 6] = 0; // lob.nsect;
cdb[ 8] = 0; // lob.lbal;
cdb[10] = 0; // lob.lbam;
cdb[12] = 0; // lob.lbah;
cdb[13] = 0x40; // dev; ATA_USING_LBA
cdb[14] = 0xB1; // command;
io_hdr.interface_id = 'S';
io_hdr.cmd_len = sizeof(cdb);
io_hdr.mx_sb_len = sizeof(sb);
io_hdr.dxfer_direction= SG_DXFER_FROM_DEV;
io_hdr.dxfer_len = 512;
io_hdr.dxferp = &data;
io_hdr.cmdp = cdb;
io_hdr.sbp = sb;
io_hdr.pack_id = 0;
io_hdr.timeout = 1000; /* msecs */
#ifdef DEBUG_HPA_DCO
log_info("sg_device_configuration_identify\n");
dump_bytes("outgoing cdb", cdb, sizeof(cdb));
#endif
if (ioctl(fd, SG_IO, &io_hdr) == -1)
return 0; /* SG_IO not supported */
#ifdef DEBUG_HPA_DCO
log_info("SG_IO: ATA_%u status=0x%x, host_status=0x%x, driver_status=0x%x\n",
io_hdr.cmd_len, io_hdr.status, io_hdr.host_status, io_hdr.driver_status);
dump_bytes("SG_IO: sb[]", sb, sizeof(sb));
dump_bytes("SG_IO: data[]", data, sizeof(data));
#endif
if (io_hdr.host_status || io_hdr.driver_status != SG_DRIVER_SENSE
|| (io_hdr.status && io_hdr.status != SG_CHECK_CONDITION))
return 0;
if (sb[0] != 0x72 || sb[7] < 14)
return 0;
/* Check for error bit */
if((sb[8+3]&1)!=0)
return 0;
for(i=0; i< 0x100; i++)
word[i]=le16(word[i]);
/* Check the signature presence */
if((word[255]&0xff)!=0xa5)
return 0;
/* Checksum must be 0 */
for(i=0;i<512;i++)
sum+=data[i];
if((sum&0xff)!=0)
return 0;
hdsize=(uint64_t)word[3] | ((uint64_t)word[4]<<16) | ((uint64_t)word[5]<<32) | ((uint64_t)word[6]<<48);
return hdsize;
#else
return 0;
#endif
}
void disk_get_hpa_dco(const int fd, disk_t *disk)
{
#ifdef HDIO_DRIVE_CMD
unsigned char id_args[4 + 512];
const uint16_t *id_val=(const uint16_t *) & id_args[4];
unsigned int flags=0;
/* Execute the IDENTIFY DEVICE command */
memset(id_args, 0, sizeof(id_args));
id_args[0] = WIN_IDENTIFY;
id_args[3] = 1;
if (ioctl(fd, HDIO_DRIVE_CMD, &id_args)) {
id_args[0] = WIN_PIDENTIFY;
if (ioctl(fd, HDIO_DRIVE_CMD, &id_args)) {
return;
}
}
if (id_val[0] & 0x8000) {
log_warning("%s is not an ATA disk\n", disk->device);
return;
}
/* Give up if LBA is not supported */
if ((id_val[49] & 0x0200) == 0) {
log_error("%s: LBA mode not supported.\n", disk->device);
return;
}
log_info("%s: LBA", disk->device);
// see if the removable media feature is supported
if (id_val[82] & 0x0004) {
flags |= DISK_HAS_REMOVABLE_SUPPORT;
log_info(", Removable");
}
// see if the HPA commands are supported
if (id_val[82] & 0x0400) {
flags |= DISK_HAS_HPA_SUPPORT;
log_info(", HPA");
}
// see if word 83 is valid -- this is a signature check
if ((id_val[83] & 0xc000) == 0x4000) {
// see if the 48-bit commands are supported
if ((id_val[83] & 0x0400) == 0x0400 && (id_val[86] & 0x0400) == 0x0400) {
flags |= DISK_HAS_48_SUPPORT;
log_info(", LBA48");
}
if (id_val[83] & 0x0800) {
log_info(", DCO");
}
}
log_info(" support\n");
disk->user_max = 0;
if (flags & DISK_HAS_48_SUPPORT) {
disk->user_max = (uint64_t) id_val[103] << 48 |
(uint64_t) id_val[102] << 32 |
(uint64_t) id_val[101] << 16 | (uint64_t) id_val[100];
}
/* Use the 28-bit fields */
if (disk->user_max == 0) {
disk->user_max = (uint64_t) id_val[61] << 16 | id_val[60];
}
disk->dco=sg_device_configuration_identify(fd);
if(flags & DISK_HAS_HPA_SUPPORT)
{
if((flags & DISK_HAS_48_SUPPORT)!=0)
disk->native_max=sg_read_native_max_ext(fd);
else
disk->native_max=read_native_max(fd);
}
if(disk->sector_size!=0)
log_info("%s: size %llu sectors\n", disk->device, (long long unsigned)(disk->disk_real_size/disk->sector_size));
if(disk->user_max!=0)
log_info("%s: user_max %llu sectors\n", disk->device, (long long unsigned)disk->user_max);
if(disk->native_max!=0)
log_info("%s: native_max %llu sectors\n", disk->device, (long long unsigned)(disk->native_max+1));
if(disk->dco!=0)
log_info("%s: dco %llu sectors\n", disk->device, (long long unsigned)(disk->dco+1));
#endif
}
#else
void disk_get_hpa_dco(const int fd, disk_t *disk)
{
}
#endif
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