nexmon – Blame information for rev 1

Subversion Repositories:
Rev:
Rev Author Line No. Line
1 office 1 /*
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 <openssl/aes.h>
55 #include <openssl/mem.h>
56  
57 #include <string.h>
58 #include <stdlib.h>
59  
60 static const uint8_t default_iv[] = {
61 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6,
62 };
63  
64 int AES_wrap_key(AES_KEY *key, const uint8_t *iv, uint8_t *out,
65 const uint8_t *in, unsigned int inlen) {
66 uint8_t *A, B[16], *R;
67 unsigned int i, j, t;
68 if ((inlen & 0x7) || (inlen < 8)) return -1;
69 A = B;
70 t = 1;
71 memcpy(out + 8, in, inlen);
72 if (!iv) iv = default_iv;
73  
74 memcpy(A, iv, 8);
75  
76 for (j = 0; j < 6; j++) {
77 R = out + 8;
78 for (i = 0; i < inlen; i += 8, t++, R += 8) {
79 memcpy(B + 8, R, 8);
80 AES_encrypt(B, B, key);
81 A[7] ^= (uint8_t)(t & 0xff);
82 if (t > 0xff) {
83 A[6] ^= (uint8_t)((t >> 8) & 0xff);
84 A[5] ^= (uint8_t)((t >> 16) & 0xff);
85 A[4] ^= (uint8_t)((t >> 24) & 0xff);
86 }
87 memcpy(R, B + 8, 8);
88 }
89 }
90 memcpy(out, A, 8);
91 return inlen + 8;
92 }
93  
94 int AES_unwrap_key(AES_KEY *key, const uint8_t *iv, uint8_t *out,
95 const uint8_t *in, unsigned int inlen) {
96 uint8_t *A, B[16], *R;
97 unsigned int i, j, t;
98 inlen -= 8;
99 if (inlen & 0x7) return -1;
100 if (inlen < 8) return -1;
101 A = B;
102 t = 6 * (inlen >> 3);
103 memcpy(A, in, 8);
104 memcpy(out, in + 8, inlen);
105 for (j = 0; j < 6; j++) {
106 R = out + inlen - 8;
107 for (i = 0; i < inlen; i += 8, t--, R -= 8) {
108 A[7] ^= (uint8_t)(t & 0xff);
109 if (t > 0xff) {
110 A[6] ^= (uint8_t)((t >> 8) & 0xff);
111 A[5] ^= (uint8_t)((t >> 16) & 0xff);
112 A[4] ^= (uint8_t)((t >> 24) & 0xff);
113 }
114 memcpy(B + 8, R, 8);
115 AES_decrypt(B, B, key);
116 memcpy(R, B + 8, 8);
117 }
118 }
119 if (!iv) iv = default_iv;
120 if (memcmp(A, iv, 8)) {
121 OPENSSL_cleanse(out, inlen);
122 return 0;
123 }
124 return inlen;
125 }