/src/libressl/crypto/aes/aes_wrap.c

Source (jump to first uncovered line)
/* $OpenBSD: aes_wrap.c,v 1.12 2018/11/07 18:31:16 tb 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 < 16))
    return -1;
  A = B;
  t = 1;
  memmove(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;

  if ((inlen & 0x7) || (inlen < 24))
    return -1;
  inlen -= 8;
  A = B;
  t = 6 * (inlen >> 3);
  memcpy(A, in, 8);
  memmove(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;
}

Line	Count	Source (jump to first uncovered line)
1		/* $OpenBSD: aes_wrap.c,v 1.12 2018/11/07 18:31:16 tb 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	0	{
67	0	unsigned char A, B[16], R;
68	0	unsigned int i, j, t;
69
70	0	if ((inlen & 0x7) \|\| (inlen < 16))
71	0	return -1;
72	0	A = B;
73	0	t = 1;
74	0	memmove(out + 8, in, inlen);
75	0	if (!iv)
76	0	iv = default_iv;
77
78	0	memcpy(A, iv, 8);
79
80	0	for (j = 0; j < 6; j++) {
81	0	R = out + 8;
82	0	for (i = 0; i < inlen; i += 8, t++, R += 8) {
83	0	memcpy(B + 8, R, 8);
84	0	AES_encrypt(B, B, key);
85	0	A[7] ^= (unsigned char)(t & 0xff);
86	0	if (t > 0xff) {
87	0	A[6] ^= (unsigned char)((t >> 8) & 0xff);
88	0	A[5] ^= (unsigned char)((t >> 16) & 0xff);
89	0	A[4] ^= (unsigned char)((t >> 24) & 0xff);
90	0	}
91	0	memcpy(R, B + 8, 8);
92	0	}
93	0	}
94	0	memcpy(out, A, 8);
95	0	return inlen + 8;
96	0	}
97
98		int
99		AES_unwrap_key(AES_KEY key, const unsigned char iv, unsigned char *out,
100		const unsigned char *in, unsigned int inlen)
101	0	{
102	0	unsigned char A, B[16], R;
103	0	unsigned int i, j, t;
104
105	0	if ((inlen & 0x7) \|\| (inlen < 24))
106	0	return -1;
107	0	inlen -= 8;
108	0	A = B;
109	0	t = 6 * (inlen >> 3);
110	0	memcpy(A, in, 8);
111	0	memmove(out, in + 8, inlen);
112	0	for (j = 0; j < 6; j++) {
113	0	R = out + inlen - 8;
114	0	for (i = 0; i < inlen; i += 8, t--, R -= 8) {
115	0	A[7] ^= (unsigned char)(t & 0xff);
116	0	if (t > 0xff) {
117	0	A[6] ^= (unsigned char)((t >> 8) & 0xff);
118	0	A[5] ^= (unsigned char)((t >> 16) & 0xff);
119	0	A[4] ^= (unsigned char)((t >> 24) & 0xff);
120	0	}
121	0	memcpy(B + 8, R, 8);
122	0	AES_decrypt(B, B, key);
123	0	memcpy(R, B + 8, 8);
124	0	}
125	0	}
126	0	if (!iv)
127	0	iv = default_iv;
128	0	if (memcmp(A, iv, 8)) {
129	0	explicit_bzero(out, inlen);
130	0	return 0;
131	0	}
132	0	return inlen;
133	0	}

Coverage Report

Created: 2022-08-24 06:30