1 /*-
2 * Copyright (c) 2017-2018, 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 unsigned char *
read_fd(int fd,size_t len)29 read_fd(int fd, size_t len)
30 {
31 int m, n, x;
32 unsigned char *buf;
33
34 buf = malloc(len + 1);
35 if (buf != NULL) {
36 for (x = 0, m = len; m > 0; ) {
37 n = read(fd, &buf[x], m);
38 if (n < 0)
39 break;
40 if (n > 0) {
41 m -= n;
42 x += n;
43 }
44 }
45 if (m == 0) {
46 buf[len] = '\0';
47 return (buf);
48 }
49 free(buf);
50 }
51 return (NULL);
52 }
53
54 unsigned char *
read_file(const char * path,size_t * len)55 read_file(const char *path, size_t *len)
56 {
57 struct stat st;
58 unsigned char *ucp;
59 int fd;
60
61 if (len)
62 *len = 0;
63 if ((fd = open(path, O_RDONLY)) < 0)
64 return (NULL);
65 fstat(fd, &st);
66 ucp = read_fd(fd, st.st_size);
67 close(fd);
68 if (ucp != NULL) {
69 if (len != NULL)
70 *len = st.st_size;
71 }
72 #ifdef _STANDALONE
73 else
74 printf("%s: out of memory! %lu\n", __func__,
75 (unsigned long)len);
76 #endif
77
78 return (ucp);
79 }
80
81