OpenCoverage

ec_check.c

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1/* $OpenBSD: ec_check.c,v 1.9 2018/07/15 16:27:39 tb Exp $ */-
2/* ====================================================================-
3 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.-
4 *-
5 * Redistribution and use in source and binary forms, with or without-
6 * modification, are permitted provided that the following conditions-
7 * are met:-
8 *-
9 * 1. Redistributions of source code must retain the above copyright-
10 * notice, this list of conditions and the following disclaimer.-
11 *-
12 * 2. Redistributions in binary form must reproduce the above copyright-
13 * notice, this list of conditions and the following disclaimer in-
14 * the documentation and/or other materials provided with the-
15 * distribution.-
16 *-
17 * 3. All advertising materials mentioning features or use of this-
18 * software must display the following acknowledgment:-
19 * "This product includes software developed by the OpenSSL Project-
20 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"-
21 *-
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to-
23 * endorse or promote products derived from this software without-
24 * prior written permission. For written permission, please contact-
25 * openssl-core@openssl.org.-
26 *-
27 * 5. Products derived from this software may not be called "OpenSSL"-
28 * nor may "OpenSSL" appear in their names without prior written-
29 * permission of the OpenSSL Project.-
30 *-
31 * 6. Redistributions of any form whatsoever must retain the following-
32 * acknowledgment:-
33 * "This product includes software developed by the OpenSSL Project-
34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"-
35 *-
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY-
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE-
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR-
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR-
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,-
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;-
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)-
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,-
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)-
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED-
47 * OF THE POSSIBILITY OF SUCH DAMAGE.-
48 * ====================================================================-
49 *-
50 * This product includes cryptographic software written by Eric Young-
51 * (eay@cryptsoft.com). This product includes software written by Tim-
52 * Hudson (tjh@cryptsoft.com).-
53 *-
54 */-
55-
56#include "ec_lcl.h"-
57#include <openssl/err.h>-
58-
59int -
60EC_GROUP_check(const EC_GROUP * group, BN_CTX * ctx)-
61{-
62 int ret = 0;-
63 BIGNUM *order;-
64 BN_CTX *new_ctx = NULL;-
65 EC_POINT *point = NULL;-
66-
67 if (ctx == NULL) {
ctx == ((void *)0)Description
TRUEevaluated 90 times by 1 test
Evaluated by:
  • ectest
FALSEnever evaluated
0-90
68 ctx = new_ctx = BN_CTX_new();-
69 if (ctx == NULL) {
ctx == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 90 times by 1 test
Evaluated by:
  • ectest
0-90
70 ECerror(ERR_R_MALLOC_FAILURE);-
71 goto err;
never executed: goto err;
0
72 }-
73 }
executed 90 times by 1 test: end of block
Executed by:
  • ectest
90
74 BN_CTX_start(ctx);-
75 if ((order = BN_CTX_get(ctx)) == NULL)
(order = BN_CT...== ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 90 times by 1 test
Evaluated by:
  • ectest
0-90
76 goto err;
never executed: goto err;
0
77-
78 /* check the discriminant */-
79 if (!EC_GROUP_check_discriminant(group, ctx)) {
!EC_GROUP_chec...nt(group, ctx)Description
TRUEnever evaluated
FALSEevaluated 90 times by 1 test
Evaluated by:
  • ectest
0-90
80 ECerror(EC_R_DISCRIMINANT_IS_ZERO);-
81 goto err;
never executed: goto err;
0
82 }-
83 /* check the generator */-
84 if (group->generator == NULL) {
group->generat...== ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 90 times by 1 test
Evaluated by:
  • ectest
0-90
85 ECerror(EC_R_UNDEFINED_GENERATOR);-
86 goto err;
never executed: goto err;
0
87 }-
88 if (EC_POINT_is_on_curve(group, group->generator, ctx) <= 0) {
EC_POINT_is_on...tor, ctx) <= 0Description
TRUEnever evaluated
FALSEevaluated 90 times by 1 test
Evaluated by:
  • ectest
0-90
89 ECerror(EC_R_POINT_IS_NOT_ON_CURVE);-
90 goto err;
never executed: goto err;
0
91 }-
92 /* check the order of the generator */-
93 if ((point = EC_POINT_new(group)) == NULL)
(point = EC_PO...== ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 90 times by 1 test
Evaluated by:
  • ectest
0-90
94 goto err;
never executed: goto err;
0
95 if (!EC_GROUP_get_order(group, order, ctx))
!EC_GROUP_get_...p, order, ctx)Description
TRUEnever evaluated
FALSEevaluated 90 times by 1 test
Evaluated by:
  • ectest
0-90
96 goto err;
never executed: goto err;
0
97 if (BN_is_zero(order)) {
((order)->top == 0)Description
TRUEnever evaluated
FALSEevaluated 90 times by 1 test
Evaluated by:
  • ectest
0-90
98 ECerror(EC_R_UNDEFINED_ORDER);-
99 goto err;
never executed: goto err;
0
100 }-
101 if (!EC_POINT_mul(group, point, order, NULL, NULL, ctx))
!EC_POINT_mul(...id *)0) , ctx)Description
TRUEnever evaluated
FALSEevaluated 90 times by 1 test
Evaluated by:
  • ectest
0-90
102 goto err;
never executed: goto err;
0
103 if (EC_POINT_is_at_infinity(group, point) <= 0) {
EC_POINT_is_at...p, point) <= 0Description
TRUEnever evaluated
FALSEevaluated 90 times by 1 test
Evaluated by:
  • ectest
0-90
104 ECerror(EC_R_INVALID_GROUP_ORDER);-
105 goto err;
never executed: goto err;
0
106 }-
107 ret = 1;-
108-
109 err:
code before this statement executed 90 times by 1 test: err:
Executed by:
  • ectest
90
110 if (ctx != NULL)
ctx != ((void *)0)Description
TRUEevaluated 90 times by 1 test
Evaluated by:
  • ectest
FALSEnever evaluated
0-90
111 BN_CTX_end(ctx);
executed 90 times by 1 test: BN_CTX_end(ctx);
Executed by:
  • ectest
90
112 BN_CTX_free(new_ctx);-
113 EC_POINT_free(point);-
114 return ret;
executed 90 times by 1 test: return ret;
Executed by:
  • ectest
90
115}-
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