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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Host functions for verified boot.
*/
#include <stdio.h>
#include <unistd.h>
#include "2sysincludes.h"
#include "2common.h"
#include "host_common.h"
int vb2_read_file(const char *filename, uint8_t **data_ptr, uint32_t *size_ptr)
{
FILE *f;
uint8_t *buf;
long size;
*data_ptr = NULL;
*size_ptr = 0;
f = fopen(filename, "rb");
if (!f) {
VB2_DEBUG("Unable to open file %s\n", filename);
return VB2_ERROR_READ_FILE_OPEN;
}
fseek(f, 0, SEEK_END);
size = ftell(f);
rewind(f);
if (size < 0 || size > UINT32_MAX) {
fclose(f);
return VB2_ERROR_READ_FILE_SIZE;
}
buf = malloc(size);
if (!buf) {
fclose(f);
return VB2_ERROR_READ_FILE_ALLOC;
}
if(1 != fread(buf, size, 1, f)) {
VB2_DEBUG("Unable to read file %s\n", filename);
fclose(f);
free(buf);
return VB2_ERROR_READ_FILE_DATA;
}
fclose(f);
*data_ptr = buf;
*size_ptr = size;
return VB2_SUCCESS;
}
int vb2_write_file(const char *filename, const void *buf, uint32_t size)
{
FILE *f = fopen(filename, "wb");
if (!f) {
VB2_DEBUG("Unable to open file %s\n", filename);
return VB2_ERROR_WRITE_FILE_OPEN;
}
if (1 != fwrite(buf, size, 1, f)) {
VB2_DEBUG("Unable to write to file %s\n", filename);
fclose(f);
unlink(filename); /* Delete any partial file */
return VB2_ERROR_WRITE_FILE_DATA;
}
fclose(f);
return VB2_SUCCESS;
}
int vb2_write_object(const char *filename, const void *buf)
{
const struct vb2_struct_common *cptr = buf;
return vb2_write_file(filename, buf, cptr->total_size);
}
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