Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/asn1/x_long.c	Lines:	34	45	75.6 %
Date:	2017-11-07	Branches:	20	28	71.4 %


/* $OpenBSD: x_long.c,v 1.11 2017/01/29 17:49:22 beck Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project 2000.
 */
/* ====================================================================
 * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <string.h>

#include <openssl/asn1t.h>
#include <openssl/bn.h>
#include <openssl/err.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 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
};

const ASN1_ITEM LONG_it = {
	.itype = ASN1_ITYPE_PRIMITIVE,
	.utype = V_ASN1_INTEGER,
	.templates = NULL,
	.tcount = 0,
	.funcs = &long_pf,
	.size = ASN1_LONG_UNDEF,
	.sname = "LONG",
};

const ASN1_ITEM ZLONG_it = {
	.itype = ASN1_ITYPE_PRIMITIVE,
	.utype = V_ASN1_INTEGER,
	.templates = NULL,
	.tcount = 0,
	.funcs = &long_pf,
	.size = 0,
	.sname = "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(&ltmp, 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)) {
		ASN1error(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) {
		ASN1error(ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
		return 0;
	}
	memcpy(cp, &ltmp, 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);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: x_long.c,v 1.11 2017/01/29 17:49:22 beck Exp $ */
2			/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3			* project 2000.
4			*/
5			/* ====================================================================
6			* Copyright (c) 2000 The OpenSSL Project. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. All advertising materials mentioning features or use of this
21			* software must display the following acknowledgment:
22			* "This product includes software developed by the OpenSSL Project
23			* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24			*
25			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* licensing@OpenSSL.org.
29			*
30			* 5. Products derived from this software may not be called "OpenSSL"
31			* nor may "OpenSSL" appear in their names without prior written
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58
59			#include <stdio.h>
60			#include <string.h>
61
62			#include <openssl/asn1t.h>
63			#include <openssl/bn.h>
64			#include <openssl/err.h>
65
66			/* Custom primitive type for long handling. This converts between an ASN1_INTEGER
67			* and a long directly.
68			*/
69
70
71			static int long_new(ASN1_VALUE *pval, const ASN1_ITEM it);
72			static void long_free(ASN1_VALUE *pval, const ASN1_ITEM it);
73
74			static int long_i2c(ASN1_VALUE *pval, unsigned char cont, int putype, const ASN1_ITEM it);
75			static int long_c2i(ASN1_VALUE *pval, const unsigned char cont, int len, int utype, char free_cont, const ASN1_ITEM it);
76			static int long_print(BIO out, ASN1_VALUE pval, const ASN1_ITEM it, int indent, const ASN1_PCTX *pctx);
77
78			static ASN1_PRIMITIVE_FUNCS long_pf = {
79			NULL, 0,
80			long_new,
81			long_free,
82			long_free, /* Clear should set to initial value */
83			long_c2i,
84			long_i2c,
85			long_print
86			};
87
88			const ASN1_ITEM LONG_it = {
89			.itype = ASN1_ITYPE_PRIMITIVE,
90			.utype = V_ASN1_INTEGER,
91			.templates = NULL,
92			.tcount = 0,
93			.funcs = &long_pf,
94			.size = ASN1_LONG_UNDEF,
95			.sname = "LONG",
96			};
97
98			const ASN1_ITEM ZLONG_it = {
99			.itype = ASN1_ITYPE_PRIMITIVE,
100			.utype = V_ASN1_INTEGER,
101			.templates = NULL,
102			.tcount = 0,
103			.funcs = &long_pf,
104			.size = 0,
105			.sname = "ZLONG",
106			};
107
108			static int
109			long_new(ASN1_VALUE *pval, const ASN1_ITEM it)
110			{
111		7152	(long )pval = it->size;
112		3576	return 1;
113			}
114
115			static void
116			long_free(ASN1_VALUE *pval, const ASN1_ITEM it)
117			{
118		7152	(long )pval = it->size;
119		3576	}
120
121			static int
122			long_i2c(ASN1_VALUE *pval, unsigned char cont, int *putype,
123			const ASN1_ITEM *it)
124			{
125			long ltmp;
126			unsigned long utmp;
127			int clen, pad, i;
128			/* this exists to bypass broken gcc optimization */
129		23536	char cp = (char )pval;
130
131			/* use memcpy, because we may not be long aligned */
132		11768	memcpy(&ltmp, cp, sizeof(long));
133
134	✓✓	11768	if (ltmp == it->size)
135		1902	return -1;
136			/* Convert the long to positive: we subtract one if negative so
137			* we can cleanly handle the padding if only the MSB of the leading
138			* octet is set.
139			*/
140	✗✓	9866	if (ltmp < 0)
141			utmp = -ltmp - 1;
142			else
143			utmp = ltmp;
144		9866	clen = BN_num_bits_word(utmp);
145			/* If MSB of leading octet set we need to pad */
146	✓✓	9866	if (!(clen & 0x7))
147		1984	pad = 1;
148			else
149			pad = 0;
150
151			/* Convert number of bits to number of octets */
152		9866	clen = (clen + 7) >> 3;
153
154	✓✓	9866	if (cont) {
155	✓✓	1706	if (pad)
156		361	*cont++ = (ltmp < 0) ? 0xff : 0;
157	✓✓	6670	for (i = clen - 1; i >= 0; i--) {
158		1629	cont[i] = (unsigned char)(utmp & 0xff);
159	✗✓	1629	if (ltmp < 0)
160			cont[i] ^= 0xff;
161		1629	utmp >>= 8;
162			}
163			}
164		9866	return clen + pad;
165		11768	}
166
167			static int
168			long_c2i(ASN1_VALUE *pval, const unsigned char cont, int len, int utype,
169			char free_cont, const ASN1_ITEM it)
170			{
171			int neg, i;
172			long ltmp;
173			unsigned long utmp = 0;
174		2322	char cp = (char )pval;
175	✗✓	1161	if (len > (int)sizeof(long)) {
176			ASN1error(ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
177			return 0;
178			}
179			/* Is it negative? */
180	✓✗✗✓	2322	if (len && (cont[0] & 0x80))
181			neg = 1;
182			else
183			neg = 0;
184			utmp = 0;
185	✓✓	4908	for (i = 0; i < len; i++) {
186		1293	utmp <<= 8;
187	✗✓	1293	if (neg)
188			utmp \|= cont[i] ^ 0xff;
189			else
190		1293	utmp \|= cont[i];
191			}
192			ltmp = (long)utmp;
193	✗✓	1161	if (neg) {
194			ltmp++;
195			ltmp = -ltmp;
196			}
197	✗✓	1161	if (ltmp == it->size) {
198			ASN1error(ASN1_R_INTEGER_TOO_LARGE_FOR_LONG);
199			return 0;
200			}
201		1161	memcpy(cp, &ltmp, sizeof(long));
202		1161	return 1;
203		1161	}
204
205			static int
206			long_print(BIO out, ASN1_VALUE pval, const ASN1_ITEM it, int indent,
207			const ASN1_PCTX *pctx)
208			{
209			return BIO_printf(out, "%ld\n", (long )pval);
210			}