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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>
- #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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