GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/crypto/../../libssl/src/crypto/bn/bn_mpi.c Lines: 0 44 0.0 %
Date: 2016-12-06 Branches: 0 24 0.0 %

Line Branch Exec Source
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/* $OpenBSD: bn_mpi.c,v 1.7 2014/07/11 08:44:48 jsing Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
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 *
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 * This package is an SSL implementation written
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 * by Eric Young (eay@cryptsoft.com).
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 * The implementation was written so as to conform with Netscapes SSL.
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 *
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 * This library is free for commercial and non-commercial use as long as
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 * the following conditions are aheared to.  The following conditions
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 * apply to all code found in this distribution, be it the RC4, RSA,
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 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
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 * included with this distribution is covered by the same copyright terms
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 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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 *
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 * Copyright remains Eric Young's, and as such any Copyright notices in
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 * the code are not to be removed.
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 * If this package is used in a product, Eric Young should be given attribution
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 * as the author of the parts of the library used.
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 * This can be in the form of a textual message at program startup or
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 * in documentation (online or textual) provided with the package.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *    "This product includes cryptographic software written by
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 *     Eric Young (eay@cryptsoft.com)"
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 *    The word 'cryptographic' can be left out if the rouines from the library
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 *    being used are not cryptographic related :-).
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 * 4. If you include any Windows specific code (or a derivative thereof) from
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 *    the apps directory (application code) you must include an acknowledgement:
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 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 * The licence and distribution terms for any publically available version or
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 * derivative of this code cannot be changed.  i.e. this code cannot simply be
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 * copied and put under another distribution licence
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 * [including the GNU Public Licence.]
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 */
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#include <stdio.h>
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#include <openssl/err.h>
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#include "bn_lcl.h"
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int
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BN_bn2mpi(const BIGNUM *a, unsigned char *d)
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{
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	int bits;
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	int num = 0;
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	int ext = 0;
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	long l;
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	bits = BN_num_bits(a);
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	num = (bits + 7) / 8;
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	if (bits > 0) {
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		ext = ((bits & 0x07) == 0);
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	}
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	if (d == NULL)
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		return (num + 4 + ext);
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	l = num + ext;
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	d[0] = (unsigned char)(l >> 24) & 0xff;
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	d[1] = (unsigned char)(l >> 16) & 0xff;
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	d[2] = (unsigned char)(l >> 8) & 0xff;
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	d[3] = (unsigned char)(l) & 0xff;
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	if (ext)
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		d[4] = 0;
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	num = BN_bn2bin(a, &(d[4 + ext]));
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	if (a->neg)
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		d[4] |= 0x80;
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	return (num + 4 + ext);
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}
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BIGNUM *
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BN_mpi2bn(const unsigned char *d, int n, BIGNUM *a)
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{
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	long len;
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	int neg = 0;
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	if (n < 4) {
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		BNerr(BN_F_BN_MPI2BN, BN_R_INVALID_LENGTH);
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		return (NULL);
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	}
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	len = ((long)d[0] << 24) | ((long)d[1] << 16) | ((int)d[2] << 8) |
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	    (int)d[3];
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	if ((len + 4) != n) {
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		BNerr(BN_F_BN_MPI2BN, BN_R_ENCODING_ERROR);
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		return (NULL);
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	}
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	if (a == NULL)
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		a = BN_new();
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	if (a == NULL)
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		return (NULL);
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	if (len == 0) {
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		a->neg = 0;
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		a->top = 0;
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		return (a);
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	}
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	d += 4;
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	if ((*d) & 0x80)
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		neg = 1;
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	if (BN_bin2bn(d, (int)len, a) == NULL)
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		return (NULL);
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	a->neg = neg;
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	if (neg) {
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		BN_clear_bit(a, BN_num_bits(a) - 1);
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	}
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	bn_check_top(a);
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	return (a);
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}