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x_long.c

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1/* $OpenBSD: x_long.c,v 1.11 2017/01/29 17:49:22 beck 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#include <string.h>-
61-
62#include <openssl/asn1t.h>-
63#include <openssl/bn.h>-
64#include <openssl/err.h>-
65-
66/* Custom primitive type for long handling. This converts between an ASN1_INTEGER-
67 * and a long directly.-
68 */-
69-
70-
71static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it);-
72static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it);-
73-
74static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);-
75static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);-
76static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx);-
77-
78static ASN1_PRIMITIVE_FUNCS long_pf = {-
79 NULL, 0,-
80 long_new,-
81 long_free,-
82 long_free, /* Clear should set to initial value */-
83 long_c2i,-
84 long_i2c,-
85 long_print-
86};-
87-
88const ASN1_ITEM LONG_it = {-
89 .itype = ASN1_ITYPE_PRIMITIVE,-
90 .utype = V_ASN1_INTEGER,-
91 .templates = NULL,-
92 .tcount = 0,-
93 .funcs = &long_pf,-
94 .size = ASN1_LONG_UNDEF,-
95 .sname = "LONG",-
96};-
97-
98const ASN1_ITEM ZLONG_it = {-
99 .itype = ASN1_ITYPE_PRIMITIVE,-
100 .utype = V_ASN1_INTEGER,-
101 .templates = NULL,-
102 .tcount = 0,-
103 .funcs = &long_pf,-
104 .size = 0,-
105 .sname = "ZLONG",-
106};-
107-
108static int-
109long_new(ASN1_VALUE **pval, const ASN1_ITEM *it)-
110{-
111 *(long *)pval = it->size;-
112 return 1;
never executed: return 1;
0
113}-
114-
115static void-
116long_free(ASN1_VALUE **pval, const ASN1_ITEM *it)-
117{-
118 *(long *)pval = it->size;-
119}
executed 126 times by 1 test: end of block
Executed by:
  • ssltest
126
120-
121static int-
122long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,-
123 const ASN1_ITEM *it)-
124{-
125 long ltmp;-
126 unsigned long utmp;-
127 int clen, pad, i;-
128 /* this exists to bypass broken gcc optimization */-
129 char *cp = (char *)pval;-
130-
131 /* use memcpy, because we may not be long aligned */-
132 memcpy(&ltmp, cp, sizeof(long));-
133-
134 if (ltmp == it->size)
ltmp == it->sizeDescription
TRUEevaluated 378 times by 1 test
Evaluated by:
  • ssltest
FALSEevaluated 60 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • ssltest
60-378
135 return -1;
executed 378 times by 1 test: return -1;
Executed by:
  • ssltest
378
136 /* Convert the long to positive: we subtract one if negative so-
137 * we can cleanly handle the padding if only the MSB of the leading-
138 * octet is set.-
139 */-
140 if (ltmp < 0)
ltmp < 0Description
TRUEnever evaluated
FALSEevaluated 60 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • ssltest
0-60
141 utmp = -ltmp - 1;
never executed: utmp = -ltmp - 1;
0
142 else-
143 utmp = ltmp;
executed 60 times by 2 tests: utmp = ltmp;
Executed by:
  • libcrypto.so.44.0.1
  • ssltest
60
144 clen = BN_num_bits_word(utmp);-
145 /* If MSB of leading octet set we need to pad */-
146 if (!(clen & 0x7))
!(clen & 0x7)Description
TRUEevaluated 60 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • ssltest
FALSEnever evaluated
0-60
147 pad = 1;
executed 60 times by 2 tests: pad = 1;
Executed by:
  • libcrypto.so.44.0.1
  • ssltest
60
148 else-
149 pad = 0;
never executed: pad = 0;
0
150-
151 /* Convert number of bits to number of octets */-
152 clen = (clen + 7) >> 3;-
153-
154 if (cont) {
contDescription
TRUEevaluated 15 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • ssltest
FALSEevaluated 45 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • ssltest
15-45
155 if (pad)
padDescription
TRUEevaluated 15 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • ssltest
FALSEnever evaluated
0-15
156 *cont++ = (ltmp < 0) ? 0xff : 0;
executed 15 times by 2 tests: *cont++ = (ltmp < 0) ? 0xff : 0;
Executed by:
  • libcrypto.so.44.0.1
  • ssltest
(ltmp < 0)Description
TRUEnever evaluated
FALSEevaluated 15 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • ssltest
0-15
157 for (i = clen - 1; i >= 0; i--) {
i >= 0Description
TRUEevaluated 14 times by 1 test
Evaluated by:
  • ssltest
FALSEevaluated 15 times by 2 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • ssltest
14-15
158 cont[i] = (unsigned char)(utmp & 0xff);-
159 if (ltmp < 0)
ltmp < 0Description
TRUEnever evaluated
FALSEevaluated 14 times by 1 test
Evaluated by:
  • ssltest
0-14
160 cont[i] ^= 0xff;
never executed: cont[i] ^= 0xff;
0
161 utmp >>= 8;-
162 }
executed 14 times by 1 test: end of block
Executed by:
  • ssltest
14
163 }
executed 15 times by 2 tests: end of block
Executed by:
  • libcrypto.so.44.0.1
  • ssltest
15
164 return clen + pad;
executed 60 times by 2 tests: return clen + pad;
Executed by:
  • libcrypto.so.44.0.1
  • ssltest
60
165}-
166-
167static int-
168long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype,-
169 char *free_cont, const ASN1_ITEM *it)-
170{-
171 int neg, i;-
172 long ltmp;-
173 unsigned long utmp = 0;-
174 char *cp = (char *)pval;-
175 if (len > (int)sizeof(long)) {
len > (int)sizeof(long)Description
TRUEnever evaluated
FALSEevaluated 79 times by 5 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
0-79
176 ASN1error(ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);-
177 return 0;
never executed: return 0;
0
178 }-
179 /* Is it negative? */-
180 if (len && (cont[0] & 0x80))
lenDescription
TRUEevaluated 79 times by 5 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
FALSEnever evaluated
(cont[0] & 0x80)Description
TRUEnever evaluated
FALSEevaluated 79 times by 5 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
0-79
181 neg = 1;
never executed: neg = 1;
0
182 else-
183 neg = 0;
executed 79 times by 5 tests: neg = 0;
Executed by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
79
184 utmp = 0;-
185 for (i = 0; i < len; i++) {
i < lenDescription
TRUEevaluated 93 times by 5 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
FALSEevaluated 79 times by 5 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
79-93
186 utmp <<= 8;-
187 if (neg)
negDescription
TRUEnever evaluated
FALSEevaluated 93 times by 5 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
0-93
188 utmp |= cont[i] ^ 0xff;
never executed: utmp |= cont[i] ^ 0xff;
0
189 else-
190 utmp |= cont[i];
executed 93 times by 5 tests: utmp |= cont[i];
Executed by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
93
191 }-
192 ltmp = (long)utmp;-
193 if (neg) {
negDescription
TRUEnever evaluated
FALSEevaluated 79 times by 5 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
0-79
194 ltmp++;-
195 ltmp = -ltmp;-
196 }
never executed: end of block
0
197 if (ltmp == it->size) {
ltmp == it->sizeDescription
TRUEnever evaluated
FALSEevaluated 79 times by 5 tests
Evaluated by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
0-79
198 ASN1error(ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);-
199 return 0;
never executed: return 0;
0
200 }-
201 memcpy(cp, &ltmp, sizeof(long));-
202 return 1;
executed 79 times by 5 tests: return 1;
Executed by:
  • libcrypto.so.44.0.1
  • pkcs7test
  • servertest
  • ssltest
  • tlstest
79
203}-
204-
205static int-
206long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent,-
207 const ASN1_PCTX *pctx)-
208{-
209 return BIO_printf(out, "%ld\n", *(long *)pval);
never executed: return BIO_printf(out, "%ld\n", *(long *)pval);
0
210}-
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