mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-11-29 19:08:25 -05:00
133 lines
4.4 KiB
C
Executable File
133 lines
4.4 KiB
C
Executable File
/* $OpenBSD: bn_mpi.c,v 1.8 2017/01/29 17:49:22 beck Exp $ */
|
|
/* 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 <stdio.h>
|
|
|
|
#include <openssl/err.h>
|
|
|
|
#include "bn_lcl.h"
|
|
|
|
int
|
|
BN_bn2mpi(const BIGNUM *a, unsigned char *d)
|
|
{
|
|
int bits;
|
|
int num = 0;
|
|
int ext = 0;
|
|
long l;
|
|
|
|
bits = BN_num_bits(a);
|
|
num = (bits + 7) / 8;
|
|
if (bits > 0) {
|
|
ext = ((bits & 0x07) == 0);
|
|
}
|
|
if (d == NULL)
|
|
return (num + 4 + ext);
|
|
|
|
l = num + ext;
|
|
d[0] = (unsigned char)(l >> 24) & 0xff;
|
|
d[1] = (unsigned char)(l >> 16) & 0xff;
|
|
d[2] = (unsigned char)(l >> 8) & 0xff;
|
|
d[3] = (unsigned char)(l) & 0xff;
|
|
if (ext)
|
|
d[4] = 0;
|
|
num = BN_bn2bin(a, &(d[4 + ext]));
|
|
if (a->neg)
|
|
d[4] |= 0x80;
|
|
return (num + 4 + ext);
|
|
}
|
|
|
|
BIGNUM *
|
|
BN_mpi2bn(const unsigned char *d, int n, BIGNUM *a)
|
|
{
|
|
long len;
|
|
int neg = 0;
|
|
|
|
if (n < 4) {
|
|
BNerror(BN_R_INVALID_LENGTH);
|
|
return (NULL);
|
|
}
|
|
len = ((long)d[0] << 24) | ((long)d[1] << 16) | ((int)d[2] << 8) |
|
|
(int)d[3];
|
|
if ((len + 4) != n) {
|
|
BNerror(BN_R_ENCODING_ERROR);
|
|
return (NULL);
|
|
}
|
|
|
|
if (a == NULL)
|
|
a = BN_new();
|
|
if (a == NULL)
|
|
return (NULL);
|
|
|
|
if (len == 0) {
|
|
a->neg = 0;
|
|
a->top = 0;
|
|
return (a);
|
|
}
|
|
d += 4;
|
|
if ((*d) & 0x80)
|
|
neg = 1;
|
|
if (BN_bin2bn(d, (int)len, a) == NULL)
|
|
return (NULL);
|
|
a->neg = neg;
|
|
if (neg) {
|
|
BN_clear_bit(a, BN_num_bits(a) - 1);
|
|
}
|
|
bn_check_top(a);
|
|
return (a);
|
|
}
|