2 * Copyright (c) 2017 Thomas Pornin <pornin@bolet.org>
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
27 static const unsigned char *
28 api_generator(int curve
, size_t *len
)
32 #if BR_INT128 || BR_UMUL128
33 return br_ec_p256_m64
.generator(curve
, len
);
35 return br_ec_p256_m31
.generator(curve
, len
);
37 case BR_EC_curve25519
:
38 #if BR_INT128 || BR_UMUL128
39 return br_ec_c25519_m64
.generator(curve
, len
);
41 return br_ec_c25519_m31
.generator(curve
, len
);
44 return br_ec_prime_i31
.generator(curve
, len
);
48 static const unsigned char *
49 api_order(int curve
, size_t *len
)
53 #if BR_INT128 || BR_UMUL128
54 return br_ec_p256_m64
.order(curve
, len
);
56 return br_ec_p256_m31
.order(curve
, len
);
58 case BR_EC_curve25519
:
59 #if BR_INT128 || BR_UMUL128
60 return br_ec_c25519_m64
.order(curve
, len
);
62 return br_ec_c25519_m31
.order(curve
, len
);
65 return br_ec_prime_i31
.order(curve
, len
);
70 api_xoff(int curve
, size_t *len
)
74 #if BR_INT128 || BR_UMUL128
75 return br_ec_p256_m64
.xoff(curve
, len
);
77 return br_ec_p256_m31
.xoff(curve
, len
);
79 case BR_EC_curve25519
:
80 #if BR_INT128 || BR_UMUL128
81 return br_ec_c25519_m64
.xoff(curve
, len
);
83 return br_ec_c25519_m31
.xoff(curve
, len
);
86 return br_ec_prime_i31
.xoff(curve
, len
);
91 api_mul(unsigned char *G
, size_t Glen
,
92 const unsigned char *kb
, size_t kblen
, int curve
)
96 #if BR_INT128 || BR_UMUL128
97 return br_ec_p256_m64
.mul(G
, Glen
, kb
, kblen
, curve
);
99 return br_ec_p256_m31
.mul(G
, Glen
, kb
, kblen
, curve
);
101 case BR_EC_curve25519
:
102 #if BR_INT128 || BR_UMUL128
103 return br_ec_c25519_m64
.mul(G
, Glen
, kb
, kblen
, curve
);
105 return br_ec_c25519_m31
.mul(G
, Glen
, kb
, kblen
, curve
);
108 return br_ec_prime_i31
.mul(G
, Glen
, kb
, kblen
, curve
);
113 api_mulgen(unsigned char *R
,
114 const unsigned char *x
, size_t xlen
, int curve
)
117 case BR_EC_secp256r1
:
118 #if BR_INT128 || BR_UMUL128
119 return br_ec_p256_m64
.mulgen(R
, x
, xlen
, curve
);
121 return br_ec_p256_m31
.mulgen(R
, x
, xlen
, curve
);
123 case BR_EC_curve25519
:
124 #if BR_INT128 || BR_UMUL128
125 return br_ec_c25519_m64
.mulgen(R
, x
, xlen
, curve
);
127 return br_ec_c25519_m31
.mulgen(R
, x
, xlen
, curve
);
130 return br_ec_prime_i31
.mulgen(R
, x
, xlen
, curve
);
135 api_muladd(unsigned char *A
, const unsigned char *B
, size_t len
,
136 const unsigned char *x
, size_t xlen
,
137 const unsigned char *y
, size_t ylen
, int curve
)
140 case BR_EC_secp256r1
:
141 #if BR_INT128 || BR_UMUL128
142 return br_ec_p256_m64
.muladd(A
, B
, len
,
143 x
, xlen
, y
, ylen
, curve
);
145 return br_ec_p256_m31
.muladd(A
, B
, len
,
146 x
, xlen
, y
, ylen
, curve
);
148 case BR_EC_curve25519
:
149 #if BR_INT128 || BR_UMUL128
150 return br_ec_c25519_m64
.muladd(A
, B
, len
,
151 x
, xlen
, y
, ylen
, curve
);
153 return br_ec_c25519_m31
.muladd(A
, B
, len
,
154 x
, xlen
, y
, ylen
, curve
);
157 return br_ec_prime_i31
.muladd(A
, B
, len
,
158 x
, xlen
, y
, ylen
, curve
);
162 /* see bearssl_ec.h */
163 const br_ec_impl br_ec_all_m31
= {
164 (uint32_t)0x23800000,