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 __FBSDID("$FreeBSD$"); 27 28 #include <libsecureboot.h> 29 30 unsigned char * 31 read_fd(int fd, size_t len) 32 { 33 int m, n, x; 34 unsigned char *buf; 35 36 buf = malloc(len + 1); 37 if (buf != NULL) { 38 for (x = 0, m = len; m > 0; ) { 39 n = read(fd, &buf[x], m); 40 if (n < 0) 41 break; 42 if (n > 0) { 43 m -= n; 44 x += n; 45 } 46 } 47 if (m == 0) { 48 buf[len] = '\0'; 49 return (buf); 50 } 51 free(buf); 52 } 53 return (NULL); 54 } 55 56 unsigned char * 57 read_file(const char *path, size_t *len) 58 { 59 struct stat st; 60 unsigned char *ucp; 61 int fd; 62 63 if (len) 64 *len = 0; 65 if ((fd = open(path, O_RDONLY)) < 0) 66 return (NULL); 67 fstat(fd, &st); 68 ucp = read_fd(fd, st.st_size); 69 close(fd); 70 if (ucp != NULL) { 71 if (len != NULL) 72 *len = st.st_size; 73 } 74 #ifdef _STANDALONE 75 else 76 printf("%s: out of memory! %lu\n", __func__, 77 (unsigned long)len); 78 #endif 79 80 return (ucp); 81 } 82 83