2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
60 #include "internal/cryptlib.h"
61 #include <openssl/asn1t.h>
62 #include <openssl/bn.h>
65 * Custom primitive type for long handling. This converts between an
66 * ASN1_INTEGER and a long directly.
69 static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
70 static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
72 static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
74 static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
75 int utype, char *free_cont, const ASN1_ITEM *it);
76 static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it,
77 int indent, const ASN1_PCTX *pctx);
79 static ASN1_PRIMITIVE_FUNCS long_pf = {
83 long_free, /* Clear should set to initial value */
90 ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, ASN1_LONG_UNDEF, "LONG"
93 ASN1_ITEM_start(ZLONG)
94 ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, 0, "ZLONG"
97 static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
99 *(long *)pval = it->size;
103 static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
105 *(long *)pval = it->size;
108 static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype,
114 /* this exists to bypass broken gcc optimization */
115 char *cp = (char *)pval;
117 /* use memcpy, because we may not be long aligned */
118 memcpy(<mp, cp, sizeof(long));
120 if (ltmp == it->size)
123 * Convert the long to positive: we subtract one if negative so we can
124 * cleanly handle the padding if only the MSB of the leading octet is
131 clen = BN_num_bits_word(utmp);
132 /* If MSB of leading octet set we need to pad */
138 /* Convert number of bits to number of octets */
139 clen = (clen + 7) >> 3;
143 *cont++ = (ltmp < 0) ? 0xff : 0;
144 for (i = clen - 1; i >= 0; i--) {
145 cont[i] = (unsigned char)(utmp & 0xff);
154 static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
155 int utype, char *free_cont, const ASN1_ITEM *it)
159 unsigned long utmp = 0;
160 char *cp = (char *)pval;
161 if (len > (int)sizeof(long)) {
162 ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
165 /* Is it negative? */
166 if (len && (cont[0] & 0x80))
171 for (i = 0; i < len; i++) {
174 utmp |= cont[i] ^ 0xff;
183 if (ltmp == it->size) {
184 ASN1err(ASN1_F_LONG_C2I, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
187 memcpy(cp, <mp, sizeof(long));
191 static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it,
192 int indent, const ASN1_PCTX *pctx)
194 return BIO_printf(out, "%ld\n", *(long *)pval);