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x_bignum.c

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1/* $OpenBSD: x_bignum.c,v 1.8 2015/07/25 17:07:17 jsing 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-
89const ASN1_ITEM BIGNUM_it = {-
90 .itype = ASN1_ITYPE_PRIMITIVE,-
91 .utype = V_ASN1_INTEGER,-
92 .templates = NULL,-
93 .tcount = 0,-
94 .funcs = &bignum_pf,-
95 .size = 0,-
96 .sname = "BIGNUM",-
97};-
98-
99const ASN1_ITEM CBIGNUM_it = {-
100 .itype = ASN1_ITYPE_PRIMITIVE,-
101 .utype = V_ASN1_INTEGER,-
102 .templates = NULL,-
103 .tcount = 0,-
104 .funcs = &bignum_pf,-
105 .size = 0,-
106 .sname = "BIGNUM",-
107};-
108-
109static int-
110bn_new(ASN1_VALUE **pval, const ASN1_ITEM *it)-
111{-
112 *pval = (ASN1_VALUE *)BN_new();-
113 if (*pval)
*pvalDescription
TRUEevaluated 2403 times by 7 tests
Evaluated by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
FALSEnever evaluated
0-2403
114 return 1;
executed 2403 times by 7 tests: return 1;
Executed by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
2403
115 else-
116 return 0;
never executed: return 0;
0
117}-
118-
119static void-
120bn_free(ASN1_VALUE **pval, const ASN1_ITEM *it)-
121{-
122 if (*pval == NULL)
*pval == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 1216 times by 1 test
Evaluated by:
  • ecdsatest
0-1216
123 return;
never executed: return;
0
124 BN_clear_free((BIGNUM *)*pval);-
125 *pval = NULL;-
126}
executed 1216 times by 1 test: end of block
Executed by:
  • ecdsatest
1216
127-
128static int-
129bn_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it)-
130{-
131 BIGNUM *bn;-
132 int pad, len;-
133-
134 if (*pval == NULL)
*pval == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 5650 times by 4 tests
Evaluated by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
0-5650
135 return -1;
never executed: return -1;
0
136 bn = (BIGNUM *)*pval;-
137 /* If MSB set in an octet we need a padding byte */-
138 if (BN_num_bits(bn) & 0x7)
BN_num_bits(bn) & 0x7Description
TRUEevaluated 3719 times by 3 tests
Evaluated by:
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
FALSEevaluated 1931 times by 4 tests
Evaluated by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
1931-3719
139 pad = 0;
executed 3719 times by 3 tests: pad = 0;
Executed by:
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
3719
140 else-
141 pad = 1;
executed 1931 times by 4 tests: pad = 1;
Executed by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
1931
142 if (cont) {
contDescription
TRUEevaluated 1528 times by 4 tests
Evaluated by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
FALSEevaluated 4122 times by 4 tests
Evaluated by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
1528-4122
143 if (pad)
padDescription
TRUEevaluated 517 times by 4 tests
Evaluated by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
FALSEevaluated 1011 times by 3 tests
Evaluated by:
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
517-1011
144 *cont++ = 0;
executed 517 times by 4 tests: *cont++ = 0;
Executed by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
517
145 len = BN_bn2bin(bn, cont);-
146 } else
executed 1528 times by 4 tests: end of block
Executed by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
1528
147 len = BN_num_bytes(bn);
executed 4122 times by 4 tests: len = ((BN_num_bits(bn)+7)/8);
Executed by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
4122
148 return pad + len;
executed 5650 times by 4 tests: return pad + len;
Executed by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • ssltest
5650
149}-
150-
151static int-
152bn_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype,-
153 char *free_cont, const ASN1_ITEM *it)-
154{-
155 BIGNUM *bn;-
156-
157 if (*pval == NULL) {
*pval == ((void *)0)Description
TRUEevaluated 1187 times by 6 tests
Evaluated by:
  • dsatest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
FALSEevaluated 912 times by 1 test
Evaluated by:
  • ecdsatest
912-1187
158 if (bn_new(pval, it) == 0)
bn_new(pval, it) == 0Description
TRUEnever evaluated
FALSEevaluated 1187 times by 6 tests
Evaluated by:
  • dsatest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
0-1187
159 return 0;
never executed: return 0;
0
160 }
executed 1187 times by 6 tests: end of block
Executed by:
  • dsatest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
1187
161 bn = (BIGNUM *)*pval;-
162 if (!BN_bin2bn(cont, len, bn)) {
!BN_bin2bn(cont, len, bn)Description
TRUEnever evaluated
FALSEevaluated 2099 times by 7 tests
Evaluated by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
0-2099
163 bn_free(pval, it);-
164 return 0;
never executed: return 0;
0
165 }-
166 return 1;
executed 2099 times by 7 tests: return 1;
Executed by:
  • dsatest
  • ecdsatest
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
2099
167}-
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