1*0957b409SSimon J. Gerraty /*
2*0957b409SSimon J. Gerraty * Copyright (c) 2017 Thomas Pornin <pornin@bolet.org>
3*0957b409SSimon J. Gerraty *
4*0957b409SSimon J. Gerraty * Permission is hereby granted, free of charge, to any person obtaining
5*0957b409SSimon J. Gerraty * a copy of this software and associated documentation files (the
6*0957b409SSimon J. Gerraty * "Software"), to deal in the Software without restriction, including
7*0957b409SSimon J. Gerraty * without limitation the rights to use, copy, modify, merge, publish,
8*0957b409SSimon J. Gerraty * distribute, sublicense, and/or sell copies of the Software, and to
9*0957b409SSimon J. Gerraty * permit persons to whom the Software is furnished to do so, subject to
10*0957b409SSimon J. Gerraty * the following conditions:
11*0957b409SSimon J. Gerraty *
12*0957b409SSimon J. Gerraty * The above copyright notice and this permission notice shall be
13*0957b409SSimon J. Gerraty * included in all copies or substantial portions of the Software.
14*0957b409SSimon J. Gerraty *
15*0957b409SSimon J. Gerraty * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16*0957b409SSimon J. Gerraty * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17*0957b409SSimon J. Gerraty * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18*0957b409SSimon J. Gerraty * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19*0957b409SSimon J. Gerraty * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20*0957b409SSimon J. Gerraty * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21*0957b409SSimon J. Gerraty * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22*0957b409SSimon J. Gerraty * SOFTWARE.
23*0957b409SSimon J. Gerraty */
24*0957b409SSimon J. Gerraty
25*0957b409SSimon J. Gerraty #include "inner.h"
26*0957b409SSimon J. Gerraty
27*0957b409SSimon J. Gerraty static const unsigned char *
api_generator(int curve,size_t * len)28*0957b409SSimon J. Gerraty api_generator(int curve, size_t *len)
29*0957b409SSimon J. Gerraty {
30*0957b409SSimon J. Gerraty switch (curve) {
31*0957b409SSimon J. Gerraty case BR_EC_secp256r1:
32*0957b409SSimon J. Gerraty return br_ec_p256_m15.generator(curve, len);
33*0957b409SSimon J. Gerraty case BR_EC_curve25519:
34*0957b409SSimon J. Gerraty return br_ec_c25519_m15.generator(curve, len);
35*0957b409SSimon J. Gerraty default:
36*0957b409SSimon J. Gerraty return br_ec_prime_i15.generator(curve, len);
37*0957b409SSimon J. Gerraty }
38*0957b409SSimon J. Gerraty }
39*0957b409SSimon J. Gerraty
40*0957b409SSimon J. Gerraty static const unsigned char *
api_order(int curve,size_t * len)41*0957b409SSimon J. Gerraty api_order(int curve, size_t *len)
42*0957b409SSimon J. Gerraty {
43*0957b409SSimon J. Gerraty switch (curve) {
44*0957b409SSimon J. Gerraty case BR_EC_secp256r1:
45*0957b409SSimon J. Gerraty return br_ec_p256_m15.order(curve, len);
46*0957b409SSimon J. Gerraty case BR_EC_curve25519:
47*0957b409SSimon J. Gerraty return br_ec_c25519_m15.order(curve, len);
48*0957b409SSimon J. Gerraty default:
49*0957b409SSimon J. Gerraty return br_ec_prime_i15.order(curve, len);
50*0957b409SSimon J. Gerraty }
51*0957b409SSimon J. Gerraty }
52*0957b409SSimon J. Gerraty
53*0957b409SSimon J. Gerraty static size_t
api_xoff(int curve,size_t * len)54*0957b409SSimon J. Gerraty api_xoff(int curve, size_t *len)
55*0957b409SSimon J. Gerraty {
56*0957b409SSimon J. Gerraty switch (curve) {
57*0957b409SSimon J. Gerraty case BR_EC_secp256r1:
58*0957b409SSimon J. Gerraty return br_ec_p256_m15.xoff(curve, len);
59*0957b409SSimon J. Gerraty case BR_EC_curve25519:
60*0957b409SSimon J. Gerraty return br_ec_c25519_m15.xoff(curve, len);
61*0957b409SSimon J. Gerraty default:
62*0957b409SSimon J. Gerraty return br_ec_prime_i15.xoff(curve, len);
63*0957b409SSimon J. Gerraty }
64*0957b409SSimon J. Gerraty }
65*0957b409SSimon J. Gerraty
66*0957b409SSimon J. Gerraty static uint32_t
api_mul(unsigned char * G,size_t Glen,const unsigned char * kb,size_t kblen,int curve)67*0957b409SSimon J. Gerraty api_mul(unsigned char *G, size_t Glen,
68*0957b409SSimon J. Gerraty const unsigned char *kb, size_t kblen, int curve)
69*0957b409SSimon J. Gerraty {
70*0957b409SSimon J. Gerraty switch (curve) {
71*0957b409SSimon J. Gerraty case BR_EC_secp256r1:
72*0957b409SSimon J. Gerraty return br_ec_p256_m15.mul(G, Glen, kb, kblen, curve);
73*0957b409SSimon J. Gerraty case BR_EC_curve25519:
74*0957b409SSimon J. Gerraty return br_ec_c25519_m15.mul(G, Glen, kb, kblen, curve);
75*0957b409SSimon J. Gerraty default:
76*0957b409SSimon J. Gerraty return br_ec_prime_i15.mul(G, Glen, kb, kblen, curve);
77*0957b409SSimon J. Gerraty }
78*0957b409SSimon J. Gerraty }
79*0957b409SSimon J. Gerraty
80*0957b409SSimon J. Gerraty static size_t
api_mulgen(unsigned char * R,const unsigned char * x,size_t xlen,int curve)81*0957b409SSimon J. Gerraty api_mulgen(unsigned char *R,
82*0957b409SSimon J. Gerraty const unsigned char *x, size_t xlen, int curve)
83*0957b409SSimon J. Gerraty {
84*0957b409SSimon J. Gerraty switch (curve) {
85*0957b409SSimon J. Gerraty case BR_EC_secp256r1:
86*0957b409SSimon J. Gerraty return br_ec_p256_m15.mulgen(R, x, xlen, curve);
87*0957b409SSimon J. Gerraty case BR_EC_curve25519:
88*0957b409SSimon J. Gerraty return br_ec_c25519_m15.mulgen(R, x, xlen, curve);
89*0957b409SSimon J. Gerraty default:
90*0957b409SSimon J. Gerraty return br_ec_prime_i15.mulgen(R, x, xlen, curve);
91*0957b409SSimon J. Gerraty }
92*0957b409SSimon J. Gerraty }
93*0957b409SSimon J. Gerraty
94*0957b409SSimon J. Gerraty static uint32_t
api_muladd(unsigned char * A,const unsigned char * B,size_t len,const unsigned char * x,size_t xlen,const unsigned char * y,size_t ylen,int curve)95*0957b409SSimon J. Gerraty api_muladd(unsigned char *A, const unsigned char *B, size_t len,
96*0957b409SSimon J. Gerraty const unsigned char *x, size_t xlen,
97*0957b409SSimon J. Gerraty const unsigned char *y, size_t ylen, int curve)
98*0957b409SSimon J. Gerraty {
99*0957b409SSimon J. Gerraty switch (curve) {
100*0957b409SSimon J. Gerraty case BR_EC_secp256r1:
101*0957b409SSimon J. Gerraty return br_ec_p256_m15.muladd(A, B, len,
102*0957b409SSimon J. Gerraty x, xlen, y, ylen, curve);
103*0957b409SSimon J. Gerraty case BR_EC_curve25519:
104*0957b409SSimon J. Gerraty return br_ec_c25519_m15.muladd(A, B, len,
105*0957b409SSimon J. Gerraty x, xlen, y, ylen, curve);
106*0957b409SSimon J. Gerraty default:
107*0957b409SSimon J. Gerraty return br_ec_prime_i15.muladd(A, B, len,
108*0957b409SSimon J. Gerraty x, xlen, y, ylen, curve);
109*0957b409SSimon J. Gerraty }
110*0957b409SSimon J. Gerraty }
111*0957b409SSimon J. Gerraty
112*0957b409SSimon J. Gerraty /* see bearssl_ec.h */
113*0957b409SSimon J. Gerraty const br_ec_impl br_ec_all_m15 = {
114*0957b409SSimon J. Gerraty (uint32_t)0x23800000,
115*0957b409SSimon J. Gerraty &api_generator,
116*0957b409SSimon J. Gerraty &api_order,
117*0957b409SSimon J. Gerraty &api_xoff,
118*0957b409SSimon J. Gerraty &api_mul,
119*0957b409SSimon J. Gerraty &api_mulgen,
120*0957b409SSimon J. Gerraty &api_muladd
121*0957b409SSimon J. Gerraty };
122