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
27 static const unsigned char *
api_generator(int curve,size_t * len)28 api_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
40 static const unsigned char *
api_order(int curve,size_t * len)41 api_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
53 static size_t
api_xoff(int curve,size_t * len)54 api_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
66 static uint32_t
api_mul(unsigned char * G,size_t Glen,const unsigned char * kb,size_t kblen,int curve)67 api_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
80 static size_t
api_mulgen(unsigned char * R,const unsigned char * x,size_t xlen,int curve)81 api_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
94 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 api_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 */
113 const 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