/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#include <openssl/asn1.h>
#include <string.h>
#include <openssl/asn1t.h>
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/mem.h>
/* Custom primitive type for long handling. This converts between an ASN1_INTEGER
* and a long directly.
*/
static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it, int indent, const ASN1_PCTX *pctx);
static const ASN1_PRIMITIVE_FUNCS long_pf = {
NULL, 0,
long_new,
long_free,
long_free, /* Clear should set to initial value */
long_c2i,
long_i2c,
long_print
};
ASN1_ITEM_start(LONG)
ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, ASN1_LONG_UNDEF, "LONG"
ASN1_ITEM_end(LONG)
ASN1_ITEM_start(ZLONG)
ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &long_pf, 0, "ZLONG"
ASN1_ITEM_end(ZLONG)
static int long_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
*(long *)pval = it->size;
return 1;
}
static void long_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
*(long *)pval = it->size;
}
static int long_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it)
{
long ltmp;
unsigned long utmp;
int clen, pad, i;
/* this exists to bypass broken gcc optimization */
char *cp = (char *)pval;
/* use memcpy, because we may not be long aligned */
memcpy(<mp, cp, sizeof(long));
if(ltmp == it->size) return -1;
/* Convert the long to positive: we subtract one if negative so
* we can cleanly handle the padding if only the MSB of the leading
* octet is set.
*/
if(ltmp < 0) utmp = -ltmp - 1;
else utmp = ltmp;
clen = BN_num_bits_word(utmp);
/* If MSB of leading octet set we need to pad */
if(!(clen & 0x7)) pad = 1;
else pad = 0;
/* Convert number of bits to number of octets */
clen = (clen + 7) >> 3;
if(cont) {
if(pad) *cont++ = (ltmp < 0) ? 0xff : 0;
for(i = clen - 1; i >= 0; i--) {
cont[i] = (unsigned char)(utmp & 0xff);
if(ltmp < 0) cont[i] ^= 0xff;
utmp >>= 8;
}
}
return clen + pad;
}
static int long_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
int utype, char *free_cont, const ASN1_ITEM *it)
{
int neg, i;
long ltmp;
unsigned long utmp = 0;
char *cp = (char *)pval;
if(len > (int)sizeof(long)) {
OPENSSL_PUT_ERROR(ASN1, long_c2i, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
return 0;
}
/* Is it negative? */
if(len && (cont[0] & 0x80)) neg = 1;
else neg = 0;
utmp = 0;
for(i = 0; i < len; i++) {
utmp <<= 8;
if(neg) utmp |= cont[i] ^ 0xff;
else utmp |= cont[i];
}
ltmp = (long)utmp;
if(neg) {
ltmp++;
ltmp = -ltmp;
}
if(ltmp == it->size) {
OPENSSL_PUT_ERROR(ASN1, long_c2i, ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
return 0;
}
memcpy(cp, <mp, sizeof(long));
return 1;
}
static int long_print(BIO *out, ASN1_VALUE **pval, const ASN1_ITEM *it,
int indent, const ASN1_PCTX *pctx)
{
return BIO_printf(out, "%ld\n", *(long *)pval);
}