fe_448.h
1 /* fe448_448.h
2  *
3  * Copyright (C) 2006-2020 wolfSSL Inc.
4  *
5  * This file is part of wolfSSL.
6  *
7  * wolfSSL is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * wolfSSL is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
20  */
21 
22 
23 #ifndef WOLF_CRYPT_FE_448_H
24 #define WOLF_CRYPT_FE_448_H
25 
26 #include <wolfssl/wolfcrypt/settings.h>
27 
28 #if defined(HAVE_CURVE448) || defined(HAVE_ED448)
29 
30 #include <stdint.h>
31 
32 #include <wolfssl/wolfcrypt/types.h>
33 
34 #if defined(HAVE___UINT128_T) && !defined(NO_CURVED448_128BIT)
35  #define CURVED448_128BIT
36 #endif
37 
38 #ifdef __cplusplus
39  extern "C" {
40 #endif
41 
42 /* default to be faster but take more memory */
43 #if !defined(CURVE448_SMALL) || !defined(ED448_SMALL)
44 
45 #if defined(CURVED448_128BIT)
46  typedef int64_t fe448;
47  #ifdef __SIZEOF_INT128__
48  typedef __uint128_t uint128_t;
49  typedef __int128_t int128_t;
50  #else
51  typedef unsigned long uint128_t __attribute__ ((mode(TI)));
52  typedef long int128_t __attribute__ ((mode(TI)));
53  #endif
54 #else
55  typedef int32_t fe448;
56 #endif
57 
58 WOLFSSL_LOCAL void fe448_init(void);
59 WOLFSSL_LOCAL int curve448(byte* r, const byte* n, const byte* a);
60 
61 #if !defined(CURVED448_128BIT)
62 WOLFSSL_LOCAL void fe448_reduce(fe448*);
63 #else
64 #define fe448_reduce(a)
65 #endif
66 WOLFSSL_LOCAL void fe448_neg(fe448*,const fe448*);
67 WOLFSSL_LOCAL void fe448_add(fe448*, const fe448*, const fe448*);
68 WOLFSSL_LOCAL void fe448_sub(fe448*, const fe448*, const fe448*);
69 WOLFSSL_LOCAL void fe448_mul(fe448*,const fe448*,const fe448*);
70 WOLFSSL_LOCAL void fe448_sqr(fe448*, const fe448*);
71 WOLFSSL_LOCAL void fe448_mul39081(fe448*, const fe448*);
72 WOLFSSL_LOCAL void fe448_invert(fe448*, const fe448*);
73 
74 WOLFSSL_LOCAL void fe448_0(fe448*);
75 WOLFSSL_LOCAL void fe448_1(fe448*);
76 WOLFSSL_LOCAL void fe448_copy(fe448*, const fe448*);
77 WOLFSSL_LOCAL int fe448_isnonzero(const fe448*);
78 WOLFSSL_LOCAL int fe448_isnegative(const fe448*);
79 
80 WOLFSSL_LOCAL void fe448_from_bytes(fe448*,const unsigned char *);
81 WOLFSSL_LOCAL void fe448_to_bytes(unsigned char *, const fe448*);
82 
83 WOLFSSL_LOCAL void fe448_cmov(fe448*,const fe448*, int);
84 WOLFSSL_LOCAL void fe448_pow_2_446_222_1(fe448*,const fe448*);
85 
86 #else
87 
88 WOLFSSL_LOCAL void fe448_init(void);
89 WOLFSSL_LOCAL int curve448(byte* r, const byte* n, const byte* a);
90 
91 #define fe448_reduce(a)
92 WOLFSSL_LOCAL void fe448_neg(uint8_t*,const uint8_t*);
93 WOLFSSL_LOCAL void fe448_add(uint8_t*, const uint8_t*, const uint8_t*);
94 WOLFSSL_LOCAL void fe448_sub(uint8_t*, const uint8_t*, const uint8_t*);
95 WOLFSSL_LOCAL void fe448_mul(uint8_t*,const uint8_t*,const uint8_t*);
96 WOLFSSL_LOCAL void fe448_sqr(uint8_t*, const uint8_t*);
97 WOLFSSL_LOCAL void fe448_mul39081(uint8_t*, const uint8_t*);
98 WOLFSSL_LOCAL void fe448_invert(uint8_t*, const uint8_t*);
99 
100 WOLFSSL_LOCAL void fe448_copy(uint8_t*, const uint8_t*);
101 WOLFSSL_LOCAL int fe448_isnonzero(const uint8_t*);
102 
103 WOLFSSL_LOCAL void fe448_norm(byte *a);
104 
105 WOLFSSL_LOCAL void fe448_cmov(uint8_t*,const uint8_t*, int);
106 WOLFSSL_LOCAL void fe448_pow_2_446_222_1(uint8_t*,const uint8_t*);
107 
108 #endif /* !CURVE448_SMALL || !ED448_SMALL */
109 
110 #ifdef __cplusplus
111  } /* extern "C" */
112 #endif
113 
114 #endif /* HAVE_CURVE448 || HAVE_ED448 */
115 
116 #endif /* WOLF_CRYPT_FE_448_H */