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authorcvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
committercvs2svn <admin@example.com>2015-03-08 16:48:49 +0000
commitdecf84ba5550c1656a7fdb51b5b81969590c3f03 (patch)
tree44872802e872bdfd60730fa9cf01d9d5751251c1 /src/lib/libcrypto/asn1/x_bignum.c
parent7a8f138352aa4eb7b65ac4b1a5fe7630fbee1427 (diff)
downloadopenbsd-libressl-v2.1.5.tar.gz
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This commit was manufactured by cvs2git to create branch 'OPENBSD_5_7'.libressl-v2.1.5
Diffstat (limited to 'src/lib/libcrypto/asn1/x_bignum.c')
-rw-r--r--src/lib/libcrypto/asn1/x_bignum.c155
1 files changed, 0 insertions, 155 deletions
diff --git a/src/lib/libcrypto/asn1/x_bignum.c b/src/lib/libcrypto/asn1/x_bignum.c
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1/* $OpenBSD: x_bignum.c,v 1.7 2014/07/12 16:42:47 miod Exp $ */
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59#include <stdio.h>
60
61#include <openssl/asn1t.h>
62#include <openssl/bn.h>
63
64/*
65 * Custom primitive type for BIGNUM handling. This reads in an ASN1_INTEGER as a
66 * BIGNUM directly. Currently it ignores the sign which isn't a problem since
67 * all BIGNUMs used are non negative and anything that looks negative is
68 * normally due to an encoding error.
69 */
70
71static int bn_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
72static void bn_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
73
74static int bn_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
75 const ASN1_ITEM *it);
76static int bn_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
77 int utype, char *free_cont, const ASN1_ITEM *it);
78
79static ASN1_PRIMITIVE_FUNCS bignum_pf = {
80 NULL,
81 0,
82 bn_new,
83 bn_free,
84 0,
85 bn_c2i,
86 bn_i2c
87};
88
89ASN1_ITEM_start(BIGNUM)
90ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &bignum_pf, 0, "BIGNUM"
91ASN1_ITEM_end(BIGNUM)
92
93ASN1_ITEM_start(CBIGNUM)
94ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &bignum_pf, 0, "BIGNUM"
95ASN1_ITEM_end(CBIGNUM)
96
97static int
98bn_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
99{
100 *pval = (ASN1_VALUE *)BN_new();
101 if (*pval)
102 return 1;
103 else
104 return 0;
105}
106
107static void
108bn_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
109{
110 if (*pval == NULL)
111 return;
112 BN_clear_free((BIGNUM *)*pval);
113 *pval = NULL;
114}
115
116static int
117bn_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it)
118{
119 BIGNUM *bn;
120 int pad, len;
121
122 if (*pval == NULL)
123 return -1;
124 bn = (BIGNUM *)*pval;
125 /* If MSB set in an octet we need a padding byte */
126 if (BN_num_bits(bn) & 0x7)
127 pad = 0;
128 else
129 pad = 1;
130 if (cont) {
131 if (pad)
132 *cont++ = 0;
133 len = BN_bn2bin(bn, cont);
134 } else
135 len = BN_num_bytes(bn);
136 return pad + len;
137}
138
139static int
140bn_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype,
141 char *free_cont, const ASN1_ITEM *it)
142{
143 BIGNUM *bn;
144
145 if (*pval == NULL) {
146 if (bn_new(pval, it) == 0)
147 return 0;
148 }
149 bn = (BIGNUM *)*pval;
150 if (!BN_bin2bn(cont, len, bn)) {
151 bn_free(pval, it);
152 return 0;
153 }
154 return 1;
155}