3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
6 /* ====================================================================
7 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
62 #include <openssl/asn1t.h>
63 #include <openssl/bn.h>
66 * Custom primitive type for long handling. This converts between an
67 * ASN1_INTEGER and a long directly.
70 static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
71 static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
73 static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
75 static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
76 int utype, char *free_cont, const ASN1_ITEM *it);
78 static ASN1_PRIMITIVE_FUNCS long_pf = {
82 long_free, /* Clear should set to initial value */
88 ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, ASN1_LONG_UNDEF, "LONG"
91 ASN1_ITEM_start(ZLONG)
92 ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, 0, "ZLONG"
95 static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
97 *(long *)pval = it->size;
101 static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
103 *(long *)pval = it->size;
106 static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
112 /* this exists to bypass broken gcc optimization */
113 char *cp = (char *)pval;
115 /* use memcpy, because we may not be long aligned */
116 memcpy(<mp, cp, sizeof(long));
118 if (ltmp == it->size)
121 * Convert the long to positive: we subtract one if negative so we can
122 * cleanly handle the padding if only the MSB of the leading octet is
129 clen = BN_num_bits_word(utmp);
130 /* If MSB of leading octet set we need to pad */
136 /* Convert number of bits to number of octets */
137 clen = (clen + 7) >> 3;
141 *cont++ = (ltmp < 0) ? 0xff : 0;
142 for (i = clen - 1; i >= 0; i--) {
143 cont[i] = (unsigned char)(utmp & 0xff);
152 static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
153 int utype, char *free_cont, const ASN1_ITEM *it)
157 unsigned long utmp = 0;
158 char *cp = (char *)pval;
159 if (len > (int)sizeof(long)) {
160 ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
163 /* Is it negative? */
164 if (len && (cont[0] & 0x80))
169 for (i = 0; i < len; i++) {
172 utmp |= cont[i] ^ 0xff;
181 if (ltmp == it->size) {
182 ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
185 memcpy(cp, <mp, sizeof(long));