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
|
/*
* Copyright (c) 2013, Google Inc.
*
* (C) Copyright 2008 Semihalf
*
* (C) Copyright 2000-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _RSA_H
#define _RSA_H
#include <errno.h>
#include <image.h>
#if IMAGE_ENABLE_SIGN
/**
* sign() - calculate and return signature for given input data
*
* @info: Specifies key and FIT information
* @data: Pointer to the input data
* @data_len: Data length
* @sigp: Set to an allocated buffer holding the signature
* @sig_len: Set to length of the calculated hash
*
* This computes input data signature according to selected algorithm.
* Resulting signature value is placed in an allocated buffer, the
* pointer is returned as *sigp. The length of the calculated
* signature is returned via the sig_len pointer argument. The caller
* should free *sigp.
*
* @return: 0, on success, -ve on error
*/
int rsa_sign(struct image_sign_info *info,
const struct image_region region[],
int region_count, uint8_t **sigp, uint *sig_len);
/**
* add_verify_data() - Add verification information to FDT
*
* Add public key information to the FDT node, suitable for
* verification at run-time. The information added depends on the
* algorithm being used.
*
* @info: Specifies key and FIT information
* @keydest: Destination FDT blob for public key data
* @return: 0, on success, -ve on error
*/
int rsa_add_verify_data(struct image_sign_info *info, void *keydest);
#else
static inline int rsa_sign(struct image_sign_info *info,
const struct image_region region[], int region_count,
uint8_t **sigp, uint *sig_len)
{
return -ENXIO;
}
static inline int rsa_add_verify_data(struct image_sign_info *info,
void *keydest)
{
return -ENXIO;
}
#endif
#if IMAGE_ENABLE_VERIFY
/**
* rsa_verify() - Verify a signature against some data
*
* Verify a RSA PKCS1.5 signature against an expected hash.
*
* @info: Specifies key and FIT information
* @data: Pointer to the input data
* @data_len: Data length
* @sig: Signature
* @sig_len: Number of bytes in signature
* @return 0 if verified, -ve on error
*/
int rsa_verify(struct image_sign_info *info,
const struct image_region region[], int region_count,
uint8_t *sig, uint sig_len);
#else
static inline int rsa_verify(struct image_sign_info *info,
const struct image_region region[], int region_count,
uint8_t *sig, uint sig_len)
{
return -ENXIO;
}
#endif
#endif
|
