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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/**
* RPiPlay - An open-source AirPlay mirroring server for Raspberry Pi
* Copyright (C) 2019 Florian Draschbacher
* Copyright (C) 2020 Jaslo Ziska
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* modified by fduncanh 2023
*/
/*
* Helper methods for various crypto operations.
* Uses OpenSSL behind the scenes.
*/
#ifndef CRYPTO_H
#define CRYPTO_H
#include <stddef.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
// 128bit AES in CTR mode
#define AES_128_BLOCK_SIZE 16
typedef enum aes_direction_e { AES_DECRYPT, AES_ENCRYPT } aes_direction_t;
typedef struct aes_ctx_s aes_ctx_t;
aes_ctx_t *aes_ctr_init(const uint8_t *key, const uint8_t *iv);
void aes_ctr_reset(aes_ctx_t *ctx);
void aes_ctr_encrypt(aes_ctx_t *ctx, const uint8_t *in, uint8_t *out, int len);
void aes_ctr_decrypt(aes_ctx_t *ctx, const uint8_t *in, uint8_t *out, int len);
void aes_ctr_start_fresh_block(aes_ctx_t *ctx);
void aes_ctr_destroy(aes_ctx_t *ctx);
aes_ctx_t *aes_cbc_init(const uint8_t *key, const uint8_t *iv, aes_direction_t direction);
void aes_cbc_reset(aes_ctx_t *ctx);
void aes_cbc_encrypt(aes_ctx_t *ctx, const uint8_t *in, uint8_t *out, int len);
void aes_cbc_decrypt(aes_ctx_t *ctx, const uint8_t *in, uint8_t *out, int len);
void aes_cbc_destroy(aes_ctx_t *ctx);
// X25519
#define X25519_KEY_SIZE 32
typedef struct x25519_key_s x25519_key_t;
x25519_key_t *x25519_key_generate(void);
x25519_key_t *x25519_key_from_raw(const unsigned char data[X25519_KEY_SIZE]);
void x25519_key_get_raw(unsigned char data[X25519_KEY_SIZE], const x25519_key_t *key);
void x25519_key_destroy(x25519_key_t *key);
int get_random_bytes(unsigned char *buf, int num);
void pk_to_base64(const unsigned char *pk, int pk_len, char *pk_base64, int len);
void x25519_derive_secret(unsigned char secret[X25519_KEY_SIZE], const x25519_key_t *ours, const x25519_key_t *theirs);
// GCM AES 128
int gcm_encrypt(const unsigned char *plaintext, int plaintext_len, unsigned char *ciphertext,
unsigned char *key, unsigned char *iv, unsigned char *tag);
int gcm_decrypt(unsigned char *ciphertext, int ciphertext_len, unsigned char *plaintext,
unsigned char *key, unsigned char *iv, unsigned char *tag);
// ED25519
#define ED25519_KEY_SIZE 32
typedef struct ed25519_key_s ed25519_key_t;
ed25519_key_t *ed25519_key_generate(const char *device_id, const char * keyfile, int * result);
ed25519_key_t *ed25519_key_from_raw(const unsigned char data[ED25519_KEY_SIZE]);
void ed25519_key_get_raw(unsigned char data[ED25519_KEY_SIZE], const ed25519_key_t *key);
/*
* Note that this function does *not copy* the OpenSSL key but only the wrapper. The internal OpenSSL key is still the
* same. Only the reference count is increased so destroying both the original and the copy is allowed.
*/
ed25519_key_t *ed25519_key_copy(const ed25519_key_t *key);
void ed25519_key_destroy(ed25519_key_t *key);
void ed25519_sign(unsigned char *signature, size_t signature_len,
const unsigned char *data, size_t data_len,
const ed25519_key_t *key);
int ed25519_verify(const unsigned char *signature, size_t signature_len,
const unsigned char *data, size_t data_len,
const ed25519_key_t *key);
// SHA512
typedef struct sha_ctx_s sha_ctx_t;
sha_ctx_t *sha_init();
void sha_update(sha_ctx_t *ctx, const uint8_t *in, int len);
void sha_final(sha_ctx_t *ctx, uint8_t *out, unsigned int *len);
void sha_reset(sha_ctx_t *ctx);
void sha_destroy(sha_ctx_t *ctx);
//MD5
typedef struct md5_ctx_s md5_ctx_t;
md5_ctx_t *md5_init();
void md5_update(md5_ctx_t *ctx, const uint8_t *in, int len);
void md5_final(md5_ctx_t *ctx, uint8_t *out, unsigned int *len);
void md5_reset(md5_ctx_t *ctx);
void md5_destroy(md5_ctx_t *ctx);
char *get_md5(char *string);
#ifdef __cplusplus
}
#endif
#endif
|
