1 /*-
2 * Copyright (c) 2018, Juniper Networks, Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
14 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
15 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
16 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
17 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
19 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25 #include <sys/cdefs.h>
26 #include <libsecureboot.h>
27
28 #include <vse.h>
29
30 /**
31 * @brief
32 * verify signed file
33 *
34 * We look for a signature using the extensions
35 * recorded in signature_exts.
36 * If we find a match we pass it to a suitable verify method.
37 *
38 * @return content of verified file or NULL on error.
39 */
40 unsigned char *
verify_signed(const char * filename,int flags)41 verify_signed(const char *filename, int flags)
42 {
43 struct stat st;
44 char buf[MAXPATHLEN];
45 const char **se;
46
47 for (se = signature_exts; *se; se++) {
48 snprintf(buf, sizeof(buf), "%s.%s", filename, *se);
49 if (stat(buf, &st) < 0 || !S_ISREG(st.st_mode))
50 continue;
51 DEBUG_PRINTF(5, ("verify_signed: %s\n", buf));
52 #ifdef VE_OPENPGP_SUPPORT
53 if (strncmp(*se, "asc", 3) == 0)
54 return (verify_asc(buf, flags));
55 #endif
56 return (verify_sig(buf, flags));
57 }
58 return (NULL);
59 }
60