5fff9558a4
Used by loader and veriexec Depends on libbearssl Reviewed by: emaste Sponsored by: Juniper Networks Differential Revision: D16335
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/*-
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* Copyright (c) 2017-2018, Juniper Networks, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <libsecureboot.h>
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unsigned char *
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read_file(const char *path, size_t *len)
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{
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int fd, m, n, x;
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struct stat st;
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unsigned char *buf;
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if (len)
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*len = 0;
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if ((fd = open(path, O_RDONLY)) < 0)
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return (NULL);
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fstat(fd, &st);
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if (len)
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*len = st.st_size;
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buf = malloc(st.st_size + 1);
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for (x = 0, m = st.st_size; m > 0; ) {
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n = read(fd, &buf[x], m);
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if (n < 0)
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break;
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if (n > 0) {
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m -= n;
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x += n;
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}
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}
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close(fd);
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if (m == 0) {
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buf[st.st_size] = '\0';
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return (buf);
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}
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free(buf);
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return (NULL);
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}
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