1/*
2 * Copyright (c) 2017 Thomas Pornin <pornin@bolet.org>
3 *
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:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
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
22 * SOFTWARE.
23 */
24
25#include "inner.h"
26
27static const unsigned char *
28api_generator(int curve, size_t *len)
29{
30	switch (curve) {
31	case BR_EC_secp256r1:
32		return br_ec_p256_m15.generator(curve, len);
33	case BR_EC_curve25519:
34		return br_ec_c25519_m15.generator(curve, len);
35	default:
36		return br_ec_prime_i15.generator(curve, len);
37	}
38}
39
40static const unsigned char *
41api_order(int curve, size_t *len)
42{
43	switch (curve) {
44	case BR_EC_secp256r1:
45		return br_ec_p256_m15.order(curve, len);
46	case BR_EC_curve25519:
47		return br_ec_c25519_m15.order(curve, len);
48	default:
49		return br_ec_prime_i15.order(curve, len);
50	}
51}
52
53static size_t
54api_xoff(int curve, size_t *len)
55{
56	switch (curve) {
57	case BR_EC_secp256r1:
58		return br_ec_p256_m15.xoff(curve, len);
59	case BR_EC_curve25519:
60		return br_ec_c25519_m15.xoff(curve, len);
61	default:
62		return br_ec_prime_i15.xoff(curve, len);
63	}
64}
65
66static uint32_t
67api_mul(unsigned char *G, size_t Glen,
68	const unsigned char *kb, size_t kblen, int curve)
69{
70	switch (curve) {
71	case BR_EC_secp256r1:
72		return br_ec_p256_m15.mul(G, Glen, kb, kblen, curve);
73	case BR_EC_curve25519:
74		return br_ec_c25519_m15.mul(G, Glen, kb, kblen, curve);
75	default:
76		return br_ec_prime_i15.mul(G, Glen, kb, kblen, curve);
77	}
78}
79
80static size_t
81api_mulgen(unsigned char *R,
82	const unsigned char *x, size_t xlen, int curve)
83{
84	switch (curve) {
85	case BR_EC_secp256r1:
86		return br_ec_p256_m15.mulgen(R, x, xlen, curve);
87	case BR_EC_curve25519:
88		return br_ec_c25519_m15.mulgen(R, x, xlen, curve);
89	default:
90		return br_ec_prime_i15.mulgen(R, x, xlen, curve);
91	}
92}
93
94static uint32_t
95api_muladd(unsigned char *A, const unsigned char *B, size_t len,
96	const unsigned char *x, size_t xlen,
97	const unsigned char *y, size_t ylen, int curve)
98{
99	switch (curve) {
100	case BR_EC_secp256r1:
101		return br_ec_p256_m15.muladd(A, B, len,
102			x, xlen, y, ylen, curve);
103	case BR_EC_curve25519:
104		return br_ec_c25519_m15.muladd(A, B, len,
105			x, xlen, y, ylen, curve);
106	default:
107		return br_ec_prime_i15.muladd(A, B, len,
108			x, xlen, y, ylen, curve);
109	}
110}
111
112/* see bearssl_ec.h */
113const br_ec_impl br_ec_all_m15 = {
114	(uint32_t)0x23800000,
115	&api_generator,
116	&api_order,
117	&api_xoff,
118	&api_mul,
119	&api_mulgen,
120	&api_muladd
121};
122