1 /*-
2  * Copyright (c) 2017-2021 Ribose Inc.
3  * Copyright (c) 2012 Alistair Crooks <agc@NetBSD.org>
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #ifndef RNP_BN_H_
28 #define RNP_BN_H_
29 
30 #include <stdio.h>
31 #include <stdint.h>
32 #include "config.h"
33 #include "mpi.h"
34 
35 #if defined(CRYPTO_BACKEND_OPENSSL)
36 #include <openssl/bn.h>
37 
38 #define bignum_t BIGNUM
39 #elif defined(CRYPTO_BACKEND_BOTAN)
40 typedef struct botan_mp_struct *botan_mp_t;
41 typedef struct bignum_t_st {
42     botan_mp_t mp;
43 } bignum_t;
44 
45 #define BN_HANDLE(x) ((x).mp)
46 #define BN_HANDLE_PTR(x) ((x)->mp)
47 #else
48 #error "Unknown crypto backend."
49 #endif
50 
51 /*********************************/
52 
53 bignum_t *bn_new(void);
54 void      bn_free(bignum_t * /*a*/);
55 
56 int bn_bn2bin(const bignum_t * /*a*/, unsigned char * /*b*/);
57 
58 bignum_t *mpi2bn(const pgp_mpi_t *val);
59 
60 bool bn2mpi(const bignum_t *bn, pgp_mpi_t *val);
61 
62 size_t bn_num_bytes(const bignum_t &a);
63 
64 #endif
65