1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/* Copyright (c) 2010 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-side misc functions for verified boot.
*/
#ifndef VBOOT_REFERENCE_HOST_MISC_H_
#define VBOOT_REFERENCE_HOST_MISC_H_
#include "utility.h"
#include "vboot_struct.h"
/* Copy up to dest_size-1 characters from src to dest, ensuring null
* termination (which strncpy() doesn't do). Returns the destination
* string. */
char* StrCopy(char* dest, const char* src, int dest_size);
/* Read data from [filename]. Store the size of returned data in [size].
*
* Returns the data buffer, which the caller must Free(), or NULL if
* error. */
uint8_t* ReadFile(const char* filename, uint64_t* size);
/* Read a string from a file. Passed the destination, dest size, and
* filename to read.
*
* Returns the destination, or NULL if error. */
char* ReadFileString(char* dest, int size, const char* filename);
/* Read an unsigned integer from a file and save into passed pointer.
*
* Returns 0 if success, -1 if error. */
int ReadFileInt(const char* filename, unsigned* value);
/* Check if a bit is set in a file which contains an integer.
*
* Returns 1 if the bit is set, 0 if clear, or -1 if error. */
int ReadFileBit(const char* filename, int bitmask);
/* Writes [size] bytes of [data] to [filename].
*
* Returns 0 if success, 1 if error. */
int WriteFile(const char* filename, const void *data, uint64_t size);
/**
* Read data from a file into a newly allocated buffer.
*
* @param filename Name of file to read from
* @param data_ptr On exit, pointer to newly allocated buffer with data
* will be stored here. Caller must free() the buffer
* when done with it.
* @param size_ptr On exit, size of data will be stored here.
* @return VB2_SUCCESS, or non-zero if error.
*/
int vb2_read_file(const char *filename, uint8_t **data_ptr, uint32_t *size_ptr);
/**
* Write data to a file from a buffer.
*
* @param filename Name of file to write to
* @param buf Buffer to write
* @param size Number of bytes of data to write
* @return VB2_SUCCESS, or non-zero if error.
*/
int vb2_write_file(const char *filename, const void *buf, uint32_t size);
/**
* Write a buffer which starts with a standard vb21_struct_common header.
*
* Determines the buffer size from the common header total size field.
*
* @param filename Name of file to write to
* @param buf Buffer to write
* @return VB2_SUCCESS, or non-zero if error.
*/
int vb21_write_object(const char *filename, const void *buf);
/**
* Round up a size to a multiple of 32 bits (4 bytes).
*/
static __inline const uint32_t roundup32(uint32_t v)
{
return (v + 3) & ~3;
}
/**
* Return the buffer size required to hold a description string.
*
* If the string is NULL or empty, the size is zero. Otherwise, it is the
* size of a buffer which can hold the string and its null terminator,
* rounded up to the nerest multiple of 32 bits.
*
* @param desc Description string
* @return The buffer size in bytes.
*/
uint32_t vb2_desc_size(const char *desc);
#endif /* VBOOT_REFERENCE_HOST_MISC_H_ */
|
