95c29f3cd1
Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta). (This change contains substantial changes from the original and effectively starts a new history.)
137 lines
5.1 KiB
C
137 lines
5.1 KiB
C
/* 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 <openssl/asn1t.h>
|
|
#include <openssl/bn.h>
|
|
|
|
|
|
/* Custom primitive type for BIGNUM handling. This reads in an ASN1_INTEGER as a
|
|
* BIGNUM directly. Currently it ignores the sign which isn't a problem since all
|
|
* BIGNUMs used are non negative and anything that looks negative is normally due
|
|
* to an encoding error.
|
|
*/
|
|
|
|
#define BN_SENSITIVE 1
|
|
|
|
static int bn_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
|
|
static void bn_free(ASN1_VALUE **pval, const ASN1_ITEM *it);
|
|
|
|
static int bn_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it);
|
|
static int bn_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it);
|
|
|
|
static ASN1_PRIMITIVE_FUNCS bignum_pf = {
|
|
NULL, 0,
|
|
bn_new,
|
|
bn_free,
|
|
0,
|
|
bn_c2i,
|
|
bn_i2c
|
|
};
|
|
|
|
ASN1_ITEM_start(BIGNUM)
|
|
ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &bignum_pf, 0, "BIGNUM"
|
|
ASN1_ITEM_end(BIGNUM)
|
|
|
|
ASN1_ITEM_start(CBIGNUM)
|
|
ASN1_ITYPE_PRIMITIVE, V_ASN1_INTEGER, NULL, 0, &bignum_pf, BN_SENSITIVE, "BIGNUM"
|
|
ASN1_ITEM_end(CBIGNUM)
|
|
|
|
static int bn_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
|
|
{
|
|
*pval = (ASN1_VALUE *)BN_new();
|
|
if(*pval) return 1;
|
|
else return 0;
|
|
}
|
|
|
|
static void bn_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
|
|
{
|
|
if(!*pval) return;
|
|
if(it->size & BN_SENSITIVE) BN_clear_free((BIGNUM *)*pval);
|
|
else BN_free((BIGNUM *)*pval);
|
|
*pval = NULL;
|
|
}
|
|
|
|
static int bn_i2c(ASN1_VALUE **pval, unsigned char *cont, int *putype, const ASN1_ITEM *it)
|
|
{
|
|
BIGNUM *bn;
|
|
int pad;
|
|
if(!*pval) return -1;
|
|
bn = (BIGNUM *)*pval;
|
|
/* If MSB set in an octet we need a padding byte */
|
|
if(BN_num_bits(bn) & 0x7) pad = 0;
|
|
else pad = 1;
|
|
if(cont) {
|
|
if(pad) *cont++ = 0;
|
|
BN_bn2bin(bn, cont);
|
|
}
|
|
return pad + BN_num_bytes(bn);
|
|
}
|
|
|
|
static int bn_c2i(ASN1_VALUE **pval, const unsigned char *cont, int len,
|
|
int utype, char *free_cont, const ASN1_ITEM *it)
|
|
{
|
|
BIGNUM *bn;
|
|
if(!*pval) bn_new(pval, it);
|
|
bn = (BIGNUM *)*pval;
|
|
if(!BN_bin2bn(cont, len, bn)) {
|
|
bn_free(pval, it);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|