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/*-
* Copyright (c) 2017-2019 Netflix, Inc.
*
* 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 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 AUTHOR 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <ctype.h>
#include <efivar.h>
#include <efivar-dp.h>
#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "efiutil.h"
#include "efichar.h"
#include <efivar-dp.h>
/*
* Dump the data as ASCII data, which is a pretty
* printed form
*/
void
asciidump(uint8_t *data, size_t datalen)
{
size_t i;
int len;
len = 0;
for (i = 0; i < datalen; i++) {
if (isprint(data[i])) {
len++;
if (len > 80) {
len = 0;
printf("\n");
}
printf("%c", data[i]);
} else {
len +=3;
if (len > 80) {
len = 0;
printf("\n");
}
printf("%%%02x", data[i]);
}
}
printf("\n");
}
void
utf8dump(uint8_t *data, size_t datalen)
{
char *utf8 = NULL;
efi_char *ucs2;
/*
* NUL terminate the string. Not all strings need it, but some
* do and an extra NUL won't change what's printed.
*/
ucs2 = malloc(datalen + sizeof(efi_char));
memcpy(ucs2, data, datalen);
ucs2[datalen / sizeof(efi_char)] = 0;
ucs2_to_utf8(ucs2, &utf8);
printf("%s\n", utf8);
free(utf8);
free(ucs2);
}
void
hexdump(uint8_t *data, size_t datalen)
{
size_t i;
for (i = 0; i < datalen; i++) {
if (i % 16 == 0) {
if (i != 0)
printf("\n");
printf("%04x: ", (int)i);
}
printf("%02x ", data[i]);
}
printf("\n");
}
void
bindump(uint8_t *data, size_t datalen)
{
write(1, data, datalen);
}
#define LOAD_OPTION_ACTIVE 1
#define SIZE(dp, edp) (size_t)((intptr_t)(void *)edp - (intptr_t)(void *)dp)
void
efi_print_load_option(uint8_t *data, size_t datalen, int Aflag, int bflag, int uflag)
{
char *dev, *relpath, *abspath;
uint8_t *ep = data + datalen;
uint8_t *walker = data;
uint32_t attr;
uint16_t fplen;
efi_char *descr;
efidp dp, edp;
char *str = NULL;
char buf[1024];
int len;
void *opt;
int optlen;
int rv;
if (datalen < sizeof(attr) + sizeof(fplen) + sizeof(efi_char))
return;
// First 4 bytes are attribute flags
attr = le32dec(walker);
walker += sizeof(attr);
// Next two bytes are length of the file paths
fplen = le16dec(walker);
walker += sizeof(fplen);
// Next we have a 0 terminated UCS2 string that we know to be aligned
descr = (efi_char *)(intptr_t)(void *)walker;
len = ucs2len(descr); // XXX need to sanity check that len < (datalen - (ep - walker) / 2)
walker += (len + 1) * sizeof(efi_char);
if (walker > ep)
return;
// Now we have fplen bytes worth of file path stuff
dp = (efidp)walker;
walker += fplen;
if (walker > ep)
return;
edp = (efidp)walker;
// Everything left is the binary option args
opt = walker;
optlen = ep - walker;
// We got to here, everything is good
printf("%c ", attr & LOAD_OPTION_ACTIVE ? '*' : ' ');
ucs2_to_utf8(descr, &str);
printf("%s\n", str);
free(str);
if (fplen <= 4) {
printf("Empty path\n");
} else {
while (dp < edp && SIZE(dp, edp) > sizeof(efidp_header)) {
efidp_format_device_path(buf, sizeof(buf), dp, SIZE(dp, edp));
rv = efivar_device_path_to_unix_path(dp, &dev, &relpath, &abspath);
dp = (efidp)((char *)dp + efidp_size(dp));
printf(" %s\n", buf);
if (rv == 0) {
printf(" %*s:%s\n", len + (int)strlen(dev), dev, relpath);
free(dev);
free(relpath);
free(abspath);
}
}
}
if (optlen == 0)
return;
printf("Option:\n");
if (Aflag)
asciidump(opt, optlen);
else if (bflag)
bindump(opt, optlen);
else if (uflag)
utf8dump(opt, optlen);
else
hexdump(opt, optlen);
}
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