/src/BearSSL/src/ec/ec_pubkey.c

Source (jump to first uncovered line)
/*
 * Copyright (c) 2018 Thomas Pornin <pornin@bolet.org>
 *
 * Permission is hereby granted, free of charge, to any person obtaining 
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be 
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "inner.h"

static const unsigned char POINT_LEN[] = {
    0,   /* 0: not a valid curve ID */
   43,   /* sect163k1 */
   43,   /* sect163r1 */
   43,   /* sect163r2 */
   51,   /* sect193r1 */
   51,   /* sect193r2 */
   61,   /* sect233k1 */
   61,   /* sect233r1 */
   61,   /* sect239k1 */
   73,   /* sect283k1 */
   73,   /* sect283r1 */
  105,   /* sect409k1 */
  105,   /* sect409r1 */
  145,   /* sect571k1 */
  145,   /* sect571r1 */
   41,   /* secp160k1 */
   41,   /* secp160r1 */
   41,   /* secp160r2 */
   49,   /* secp192k1 */
   49,   /* secp192r1 */
   57,   /* secp224k1 */
   57,   /* secp224r1 */
   65,   /* secp256k1 */
   65,   /* secp256r1 */
   97,   /* secp384r1 */
  133,   /* secp521r1 */
   65,   /* brainpoolP256r1 */
   97,   /* brainpoolP384r1 */
  129,   /* brainpoolP512r1 */
   32,   /* curve25519 */
   56,   /* curve448 */
};

/* see bearssl_ec.h */
size_t
br_ec_compute_pub(const br_ec_impl *impl, br_ec_public_key *pk,
  void *kbuf, const br_ec_private_key *sk)
{
  int curve;
  size_t len;

  curve = sk->curve;
  if (curve < 0 || curve >= 32 || curve >= (int)(sizeof POINT_LEN)
    || ((impl->supported_curves >> curve) & 1) == 0)
  {
    return 0;
  }
  if (kbuf == NULL) {
    return POINT_LEN[curve];
  }
  len = impl->mulgen(kbuf, sk->x, sk->xlen, curve);
  if (pk != NULL) {
    pk->curve = curve;
    pk->q = kbuf;
    pk->qlen = len;
  }
  return len;
}

Coverage Report

Created: 2024-11-21 06:38

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright (c) 2018 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 POINT_LEN[] = {
28		0, /* 0: not a valid curve ID */
29		43, /* sect163k1 */
30		43, /* sect163r1 */
31		43, /* sect163r2 */
32		51, /* sect193r1 */
33		51, /* sect193r2 */
34		61, /* sect233k1 */
35		61, /* sect233r1 */
36		61, /* sect239k1 */
37		73, /* sect283k1 */
38		73, /* sect283r1 */
39		105, /* sect409k1 */
40		105, /* sect409r1 */
41		145, /* sect571k1 */
42		145, /* sect571r1 */
43		41, /* secp160k1 */
44		41, /* secp160r1 */
45		41, /* secp160r2 */
46		49, /* secp192k1 */
47		49, /* secp192r1 */
48		57, /* secp224k1 */
49		57, /* secp224r1 */
50		65, /* secp256k1 */
51		65, /* secp256r1 */
52		97, /* secp384r1 */
53		133, /* secp521r1 */
54		65, /* brainpoolP256r1 */
55		97, /* brainpoolP384r1 */
56		129, /* brainpoolP512r1 */
57		32, /* curve25519 */
58		56, /* curve448 */
59		};
60
61		/* see bearssl_ec.h */
62		size_t
63		br_ec_compute_pub(const br_ec_impl impl, br_ec_public_key pk,
64		void kbuf, const br_ec_private_key sk)
65	1.99k	{
66	1.99k	int curve;
67	1.99k	size_t len;
68
69	1.99k	curve = sk->curve;
70	1.99k	if (curve < 0 \|\| curve >= 32 \|\| curve >= (int)(sizeof POINT_LEN)
71	1.99k	\|\| ((impl->supported_curves >> curve) & 1) == 0)
72	204	{
73	204	return 0;
74	204	}
75	1.78k	if (kbuf == NULL) {
76	0	return POINT_LEN[curve];
77	0	}
78	1.78k	len = impl->mulgen(kbuf, sk->x, sk->xlen, curve);
79	1.78k	if (pk != NULL) {
80	1.78k	pk->curve = curve;
81	1.78k	pk->q = kbuf;
82	1.78k	pk->qlen = len;
83	1.78k	}
84	1.78k	return len;
85	1.78k	}