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/*
* Copyright 2013 <James.Bottomley@HansenPartnership.com>
*
* see COPYING file
*/
#include <stdlib.h>
#include <stdint.h>
#include <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <openssl/x509.h>
#include <efi.h>
#include <kernel_efivars.h>
#include <guid.h>
#include <sha256.h>
#include <version.h>
#include "efiauthenticated.h"
#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
static void
usage(const char *progname)
{
printf("Usage: %s: [-v <var>] [-s <list>[-<entry>]] [-o <file>]\n", progname);
}
static void
help(const char *progname)
{
usage(progname);
printf("List the contents of the UEFI signature databases\n\n"
"Options:\n"
"\t-v <var>\tlist only the contents of <var>\n"
"\t-s <list>[-<entry>]\tlist only a given signature list (and optionally\n"
"\t\tonly a given entry in that list\n"
"\t-o <file>\toutput the requested signature lists to <file>\n"
);
}
void
parse_db(const char *name, uint8_t *data, uint32_t len, int sig, int entry)
{
EFI_SIGNATURE_LIST *CertList = (EFI_SIGNATURE_LIST *)data;
EFI_SIGNATURE_DATA *Cert;
long count = 0, DataSize = len;
int size;
certlist_for_each_certentry(CertList, data, size, DataSize) {
int Index = 0;
const char *ext;
if (sig != -1 && count != sig)
continue;
if (compare_guid(&CertList->SignatureType, &X509_GUID)== 0) {
ext = "X509";
} else if (compare_guid(&CertList->SignatureType, &RSA2048_GUID) == 0) {
ext = "RSA2048";
} else if (compare_guid(&CertList->SignatureType, &PKCS7_GUID) == 0) {
ext = "PKCS7";
} else if (compare_guid(&CertList->SignatureType, &EFI_CERT_SHA256_GUID) == 0) {
ext = "SHA256";
} else {
ext = "Unknown";
}
printf("%s: List %ld, type %s\n", name, count++, ext);
certentry_for_each_cert(Cert, CertList) {
if (entry != -1 && Index != entry)
continue;
printf(" Signature %d, size %d, owner %s\n",
Index++, CertList->SignatureSize,
guid_to_str(&Cert->SignatureOwner));
if (strcmp(ext, "X509") == 0) {
const unsigned char *buf = (unsigned char *)Cert->SignatureData;
X509 *X = d2i_X509(NULL, &buf,
CertList->SignatureSize);
X509_NAME *issuer = X509_get_issuer_name(X);
X509_NAME *subject = X509_get_subject_name(X);
printf(" Subject:\n");
X509_NAME_print_ex_fp(stdout, subject, 12, XN_FLAG_SEP_CPLUS_SPC);
printf("\n Issuer:\n");
X509_NAME_print_ex_fp(stdout, issuer, 12, XN_FLAG_SEP_CPLUS_SPC);
printf("\n");
} else if (strcmp(ext, "SHA256") == 0) {
uint8_t *hash = Cert->SignatureData;
int j;
printf(" Hash:");
for (j = 0; j < SHA256_DIGEST_SIZE; j++) {
printf("%02x", hash[j]);
}
printf("\n");
}
}
}
}
int
main(int argc, char *argv[])
{
char *variables[] = { "PK", "KEK", "db", "dbx" , "MokList" };
char *progname = argv[0], *var = NULL, *file = NULL;
EFI_GUID *owners[] = { &GV_GUID, &GV_GUID, &SIG_DB, &SIG_DB, &MOK_OWNER };
int i, found = 0, sig = -1, entry = -1, fd;
while (argc > 1 && argv[1][0] == '-') {
if (strcmp("--version", argv[1]) == 0) {
version(progname);
exit(0);
} else if (strcmp("--help", argv[1]) == 0) {
help(progname);
exit(0);
} else if(strcmp(argv[1], "-v") == 0) {
var = argv[2];
argv += 2;
argc -= 2;
} else if (strcmp(argv[1], "-s") == 0) {
sscanf(argv[2], "%d-%d", &sig, &entry);
argv += 2;
argc -= 2;
} else if (strcmp(argv[1], "-o") == 0) {
file = argv[2];
argv += 2;
argc -= 2;
} else {
/* unrecognised option */
break;
}
}
if (argc != 1) {
usage(progname);
exit(1);
}
if (sig != -1 && !var) {
fprintf(stderr, "need -v <var> with -s option\n");
exit(1);
}
if (file) {
fd = open(file, O_CREAT|O_TRUNC|O_WRONLY, 0600);
if (fd < 0) {
fprintf(stderr, "failed to open %s: ", file);
perror("");
exit(1);
}
}
kernel_variable_init();
for (i = 0; i < ARRAY_SIZE(owners); i++) {
int status;
uint32_t len;
uint8_t *buf;
if (var && strcmp(var, variables[i]) != 0)
continue;
found = 1;
status = get_variable_alloc(variables[i], owners[i], NULL,
&len, &buf);
if (status == ENOENT) {
printf("Variable %s has no entries\n", variables[i]);
continue;
} else if (status != 0) {
printf("Failed to get %s: %d\n", variables[i], status);
continue;
}
printf("Variable %s, length %d\n", variables[i], len);
if (file)
write(fd, buf, len);
else
parse_db(variables[i], buf, len, sig, entry);
free(buf);
}
if (file)
close(fd);
if (!found) {
fprintf(stderr, "variable %s is not a UEFI secure boot variable\n", var);
exit(1);
}
return 0;
}
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