OpenCoverage

ec_print.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/ec/ec_print.c
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1/* $OpenBSD: ec_print.c,v 1.7 2014/12/03 19:53:20 deraadt 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 <openssl/crypto.h>-
57#include "ec_lcl.h"-
58-
59BIGNUM *-
60EC_POINT_point2bn(const EC_GROUP * group, const EC_POINT * point,-
61 point_conversion_form_t form, BIGNUM * ret, BN_CTX * ctx)-
62{-
63 size_t buf_len = 0;-
64 unsigned char *buf;-
65-
66 buf_len = EC_POINT_point2oct(group, point, form,-
67 NULL, 0, ctx);-
68 if (buf_len == 0)
buf_len == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
69 return NULL;
never executed: return ((void *)0) ;
0
70-
71 if ((buf = malloc(buf_len)) == NULL)
(buf = malloc(...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
72 return NULL;
never executed: return ((void *)0) ;
0
73-
74 if (!EC_POINT_point2oct(group, point, form, buf, buf_len, ctx)) {
!EC_POINT_poin... buf_len, ctx)Description
TRUEnever evaluated
FALSEnever evaluated
0
75 free(buf);-
76 return NULL;
never executed: return ((void *)0) ;
0
77 }-
78 ret = BN_bin2bn(buf, buf_len, ret);-
79-
80 free(buf);-
81-
82 return ret;
never executed: return ret;
0
83}-
84-
85EC_POINT *-
86EC_POINT_bn2point(const EC_GROUP * group,-
87 const BIGNUM * bn, EC_POINT * point, BN_CTX * ctx)-
88{-
89 size_t buf_len = 0;-
90 unsigned char *buf;-
91 EC_POINT *ret;-
92-
93 if ((buf_len = BN_num_bytes(bn)) == 0)
(buf_len = ((B...n)+7)/8)) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
94 return NULL;
never executed: return ((void *)0) ;
0
95 buf = malloc(buf_len);-
96 if (buf == NULL)
buf == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
97 return NULL;
never executed: return ((void *)0) ;
0
98-
99 if (!BN_bn2bin(bn, buf)) {
!BN_bn2bin(bn, buf)Description
TRUEnever evaluated
FALSEnever evaluated
0
100 free(buf);-
101 return NULL;
never executed: return ((void *)0) ;
0
102 }-
103 if (point == NULL) {
point == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
104 if ((ret = EC_POINT_new(group)) == NULL) {
(ret = EC_POIN...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
105 free(buf);-
106 return NULL;
never executed: return ((void *)0) ;
0
107 }-
108 } else
never executed: end of block
0
109 ret = point;
never executed: ret = point;
0
110-
111 if (!EC_POINT_oct2point(group, ret, buf, buf_len, ctx)) {
!EC_POINT_oct2... buf_len, ctx)Description
TRUEnever evaluated
FALSEnever evaluated
0
112 if (point == NULL)
point == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
113 EC_POINT_clear_free(ret);
never executed: EC_POINT_clear_free(ret);
0
114 free(buf);-
115 return NULL;
never executed: return ((void *)0) ;
0
116 }-
117 free(buf);-
118 return ret;
never executed: return ret;
0
119}-
120-
121static const char *HEX_DIGITS = "0123456789ABCDEF";-
122-
123/* the return value must be freed (using free()) */-
124char *-
125EC_POINT_point2hex(const EC_GROUP * group, const EC_POINT * point,-
126 point_conversion_form_t form, BN_CTX * ctx)-
127{-
128 char *ret, *p;-
129 size_t buf_len = 0, i;-
130 unsigned char *buf, *pbuf;-
131-
132 buf_len = EC_POINT_point2oct(group, point, form,-
133 NULL, 0, ctx);-
134 if (buf_len == 0 || buf_len + 1 == 0)
buf_len == 0Description
TRUEnever evaluated
FALSEnever evaluated
buf_len + 1 == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
135 return NULL;
never executed: return ((void *)0) ;
0
136-
137 if ((buf = malloc(buf_len)) == NULL)
(buf = malloc(...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
138 return NULL;
never executed: return ((void *)0) ;
0
139-
140 if (!EC_POINT_point2oct(group, point, form, buf, buf_len, ctx)) {
!EC_POINT_poin... buf_len, ctx)Description
TRUEnever evaluated
FALSEnever evaluated
0
141 free(buf);-
142 return NULL;
never executed: return ((void *)0) ;
0
143 }-
144 ret = reallocarray(NULL, buf_len + 1, 2);-
145 if (ret == NULL) {
ret == ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
146 free(buf);-
147 return NULL;
never executed: return ((void *)0) ;
0
148 }-
149 p = ret;-
150 pbuf = buf;-
151 for (i = buf_len; i > 0; i--) {
i > 0Description
TRUEnever evaluated
FALSEnever evaluated
0
152 int v = (int) *(pbuf++);-
153 *(p++) = HEX_DIGITS[v >> 4];-
154 *(p++) = HEX_DIGITS[v & 0x0F];-
155 }
never executed: end of block
0
156 *p = '\0';-
157-
158 free(buf);-
159-
160 return ret;
never executed: return ret;
0
161}-
162-
163EC_POINT *-
164EC_POINT_hex2point(const EC_GROUP * group, const char *buf,-
165 EC_POINT * point, BN_CTX * ctx)-
166{-
167 EC_POINT *ret = NULL;-
168 BIGNUM *tmp_bn = NULL;-
169-
170 if (!BN_hex2bn(&tmp_bn, buf))
!BN_hex2bn(&tmp_bn, buf)Description
TRUEnever evaluated
FALSEnever evaluated
0
171 return NULL;
never executed: return ((void *)0) ;
0
172-
173 ret = EC_POINT_bn2point(group, tmp_bn, point, ctx);-
174-
175 BN_clear_free(tmp_bn);-
176-
177 return ret;
never executed: return ret;
0
178}-
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