Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libcrypto/aes/aes_wrap.c	Lines:	38	49	77.6 %
Date:	2017-11-13	Branches:	16	24	66.7 %


/* $OpenBSD: aes_wrap.c,v 1.10 2015/09/10 15:56:24 jsing Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
 * project.
 */
/* ====================================================================
 * Copyright (c) 2008 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.
 * ====================================================================
 */

#include <string.h>

#include <openssl/aes.h>
#include <openssl/bio.h>

static const unsigned char default_iv[] = {
	0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6,
};

int
AES_wrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out,
    const unsigned char *in, unsigned int inlen)
{
	unsigned char *A, B[16], *R;
	unsigned int i, j, t;
	if ((inlen & 0x7) || (inlen < 8))
		return -1;
	A = B;
	t = 1;
	memcpy(out + 8, in, inlen);
	if (!iv)
		iv = default_iv;

	memcpy(A, iv, 8);

	for (j = 0; j < 6; j++) {
		R = out + 8;
		for (i = 0; i < inlen; i += 8, t++, R += 8) {
			memcpy(B + 8, R, 8);
			AES_encrypt(B, B, key);
			A[7] ^= (unsigned char)(t & 0xff);
			if (t > 0xff) {
				A[6] ^= (unsigned char)((t >> 8) & 0xff);
				A[5] ^= (unsigned char)((t >> 16) & 0xff);
				A[4] ^= (unsigned char)((t >> 24) & 0xff);
			}
			memcpy(R, B + 8, 8);
		}
	}
	memcpy(out, A, 8);
	return inlen + 8;
}

int
AES_unwrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out,
    const unsigned char *in, unsigned int inlen)
{
	unsigned char *A, B[16], *R;
	unsigned int i, j, t;
	inlen -= 8;
	if (inlen & 0x7)
		return -1;
	if (inlen < 8)
		return -1;
	A = B;
	t = 6 * (inlen >> 3);
	memcpy(A, in, 8);
	memcpy(out, in + 8, inlen);
	for (j = 0; j < 6; j++) {
		R = out + inlen - 8;
		for (i = 0; i < inlen; i += 8, t--, R -= 8) {
			A[7] ^= (unsigned char)(t & 0xff);
			if (t > 0xff) {
				A[6] ^= (unsigned char)((t >> 8) & 0xff);
				A[5] ^= (unsigned char)((t >> 16) & 0xff);
				A[4] ^= (unsigned char)((t >> 24) & 0xff);
			}
			memcpy(B + 8, R, 8);
			AES_decrypt(B, B, key);
			memcpy(R, B + 8, 8);
		}
	}
	if (!iv)
		iv = default_iv;
	if (memcmp(A, iv, 8)) {
		explicit_bzero(out, inlen);
		return 0;
	}
	return inlen;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: aes_wrap.c,v 1.10 2015/09/10 15:56:24 jsing Exp $ */
2			/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3			* project.
4			*/
5			/* ====================================================================
6			* Copyright (c) 2008 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
54			#include <string.h>
55
56			#include <openssl/aes.h>
57			#include <openssl/bio.h>
58
59			static const unsigned char default_iv[] = {
60			0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6,
61			};
62
63			int
64			AES_wrap_key(AES_KEY key, const unsigned char iv, unsigned char *out,
65			const unsigned char *in, unsigned int inlen)
66			{
67		36	unsigned char A, B[16], R;
68			unsigned int i, j, t;
69	✗✓	18	if ((inlen & 0x7) \|\| (inlen < 8))
70			return -1;
71		18	A = B;
72			t = 1;
73		18	memcpy(out + 8, in, inlen);
74	✓✗	18	if (!iv)
75		18	iv = default_iv;
76
77		18	memcpy(A, iv, 8);
78
79	✓✓	252	for (j = 0; j < 6; j++) {
80			R = out + 8;
81	✓✓	792	for (i = 0; i < inlen; i += 8, t++, R += 8) {
82		288	memcpy(B + 8, R, 8);
83		288	AES_encrypt(B, B, key);
84		288	A[7] ^= (unsigned char)(t & 0xff);
85	✗✓	288	if (t > 0xff) {
86			A[6] ^= (unsigned char)((t >> 8) & 0xff);
87			A[5] ^= (unsigned char)((t >> 16) & 0xff);
88			A[4] ^= (unsigned char)((t >> 24) & 0xff);
89			}
90		288	memcpy(R, B + 8, 8);
91			}
92			}
93		18	memcpy(out, A, 8);
94		18	return inlen + 8;
95		18	}
96
97			int
98			AES_unwrap_key(AES_KEY key, const unsigned char iv, unsigned char *out,
99			const unsigned char *in, unsigned int inlen)
100			{
101		36	unsigned char A, B[16], R;
102			unsigned int i, j, t;
103		18	inlen -= 8;
104	✗✓	18	if (inlen & 0x7)
105			return -1;
106	✗✓	18	if (inlen < 8)
107			return -1;
108		18	A = B;
109		18	t = 6 * (inlen >> 3);
110		18	memcpy(A, in, 8);
111		18	memcpy(out, in + 8, inlen);
112	✓✓	252	for (j = 0; j < 6; j++) {
113		108	R = out + inlen - 8;
114	✓✓	792	for (i = 0; i < inlen; i += 8, t--, R -= 8) {
115		288	A[7] ^= (unsigned char)(t & 0xff);
116	✗✓	288	if (t > 0xff) {
117			A[6] ^= (unsigned char)((t >> 8) & 0xff);
118			A[5] ^= (unsigned char)((t >> 16) & 0xff);
119			A[4] ^= (unsigned char)((t >> 24) & 0xff);
120			}
121		288	memcpy(B + 8, R, 8);
122		288	AES_decrypt(B, B, key);
123		288	memcpy(R, B + 8, 8);
124			}
125			}
126	✓✗	18	if (!iv)
127		18	iv = default_iv;
128	✗✓	18	if (memcmp(A, iv, 8)) {
129			explicit_bzero(out, inlen);
130			return 0;
131			}
132		18	return inlen;
133		18	}