Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/bn/bn_mpi.c	Lines:	0	42	0.0 %
Date:	2017-11-13	Branches:	0	24	0.0 %


/* $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);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: bn_mpi.c,v 1.8 2017/01/29 17:49:22 beck Exp $ */
2			/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3			* All rights reserved.
4			*
5			* This package is an SSL implementation written
6			* by Eric Young (eay@cryptsoft.com).
7			* The implementation was written so as to conform with Netscapes SSL.
8			*
9			* This library is free for commercial and non-commercial use as long as
10			* the following conditions are aheared to. The following conditions
11			* apply to all code found in this distribution, be it the RC4, RSA,
12			* lhash, DES, etc., code; not just the SSL code. The SSL documentation
13			* included with this distribution is covered by the same copyright terms
14			* except that the holder is Tim Hudson (tjh@cryptsoft.com).
15			*
16			* Copyright remains Eric Young's, and as such any Copyright notices in
17			* the code are not to be removed.
18			* If this package is used in a product, Eric Young should be given attribution
19			* as the author of the parts of the library used.
20			* This can be in the form of a textual message at program startup or
21			* in documentation (online or textual) provided with the package.
22			*
23			* Redistribution and use in source and binary forms, with or without
24			* modification, are permitted provided that the following conditions
25			* are met:
26			* 1. Redistributions of source code must retain the copyright
27			* notice, this list of conditions and the following disclaimer.
28			* 2. Redistributions in binary form must reproduce the above copyright
29			* notice, this list of conditions and the following disclaimer in the
30			* documentation and/or other materials provided with the distribution.
31			* 3. All advertising materials mentioning features or use of this software
32			* must display the following acknowledgement:
33			* "This product includes cryptographic software written by
34			* Eric Young (eay@cryptsoft.com)"
35			* The word 'cryptographic' can be left out if the rouines from the library
36			* being used are not cryptographic related :-).
37			* 4. If you include any Windows specific code (or a derivative thereof) from
38			* the apps directory (application code) you must include an acknowledgement:
39			* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40			*
41			* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51			* SUCH DAMAGE.
52			*
53			* The licence and distribution terms for any publically available version or
54			* derivative of this code cannot be changed. i.e. this code cannot simply be
55			* copied and put under another distribution licence
56			* [including the GNU Public Licence.]
57			*/
58
59			#include <stdio.h>
60
61			#include <openssl/err.h>
62
63			#include "bn_lcl.h"
64
65			int
66			BN_bn2mpi(const BIGNUM a, unsigned char d)
67			{
68			int bits;
69			int num = 0;
70			int ext = 0;
71			long l;
72
73			bits = BN_num_bits(a);
74			num = (bits + 7) / 8;
75			if (bits > 0) {
76			ext = ((bits & 0x07) == 0);
77			}
78			if (d == NULL)
79			return (num + 4 + ext);
80
81			l = num + ext;
82			d[0] = (unsigned char)(l >> 24) & 0xff;
83			d[1] = (unsigned char)(l >> 16) & 0xff;
84			d[2] = (unsigned char)(l >> 8) & 0xff;
85			d[3] = (unsigned char)(l) & 0xff;
86			if (ext)
87			d[4] = 0;
88			num = BN_bn2bin(a, &(d[4 + ext]));
89			if (a->neg)
90			d[4] \|= 0x80;
91			return (num + 4 + ext);
92			}
93
94			BIGNUM *
95			BN_mpi2bn(const unsigned char d, int n, BIGNUM a)
96			{
97			long len;
98			int neg = 0;
99
100			if (n < 4) {
101			BNerror(BN_R_INVALID_LENGTH);
102			return (NULL);
103			}
104			len = ((long)d[0] << 24) \| ((long)d[1] << 16) \| ((int)d[2] << 8) \|
105			(int)d[3];
106			if ((len + 4) != n) {
107			BNerror(BN_R_ENCODING_ERROR);
108			return (NULL);
109			}
110
111			if (a == NULL)
112			a = BN_new();
113			if (a == NULL)
114			return (NULL);
115
116			if (len == 0) {
117			a->neg = 0;
118			a->top = 0;
119			return (a);
120			}
121			d += 4;
122			if ((*d) & 0x80)
123			neg = 1;
124			if (BN_bin2bn(d, (int)len, a) == NULL)
125			return (NULL);
126			a->neg = neg;
127			if (neg) {
128			BN_clear_bit(a, BN_num_bits(a) - 1);
129			}
130			bn_check_top(a);
131			return (a);
132			}