OpenCoverage

aes_wrap.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/aes/aes_wrap.c
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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-
59static const unsigned char default_iv[] = {-
60 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6,-
61};-
62-
63int-
64AES_wrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out,-
65 const unsigned char *in, unsigned int inlen)-
66{-
67 unsigned char *A, B[16], *R;-
68 unsigned int i, j, t;-
69 if ((inlen & 0x7) || (inlen < 8))
(inlen & 0x7)Description
TRUEnever evaluated
FALSEevaluated 6 times by 1 test
Evaluated by:
  • aes_wrap
(inlen < 8)Description
TRUEnever evaluated
FALSEevaluated 6 times by 1 test
Evaluated by:
  • aes_wrap
0-6
70 return -1;
never executed: return -1;
0
71 A = B;-
72 t = 1;-
73 memcpy(out + 8, in, inlen);-
74 if (!iv)
!ivDescription
TRUEevaluated 6 times by 1 test
Evaluated by:
  • aes_wrap
FALSEnever evaluated
0-6
75 iv = default_iv;
executed 6 times by 1 test: iv = default_iv;
Executed by:
  • aes_wrap
6
76-
77 memcpy(A, iv, 8);-
78-
79 for (j = 0; j < 6; j++) {
j < 6Description
TRUEevaluated 36 times by 1 test
Evaluated by:
  • aes_wrap
FALSEevaluated 6 times by 1 test
Evaluated by:
  • aes_wrap
6-36
80 R = out + 8;-
81 for (i = 0; i < inlen; i += 8, t++, R += 8) {
i < inlenDescription
TRUEevaluated 96 times by 1 test
Evaluated by:
  • aes_wrap
FALSEevaluated 36 times by 1 test
Evaluated by:
  • aes_wrap
36-96
82 memcpy(B + 8, R, 8);-
83 AES_encrypt(B, B, key);-
84 A[7] ^= (unsigned char)(t & 0xff);-
85 if (t > 0xff) {
t > 0xffDescription
TRUEnever evaluated
FALSEevaluated 96 times by 1 test
Evaluated by:
  • aes_wrap
0-96
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 }
never executed: end of block
0
90 memcpy(R, B + 8, 8);-
91 }
executed 96 times by 1 test: end of block
Executed by:
  • aes_wrap
96
92 }
executed 36 times by 1 test: end of block
Executed by:
  • aes_wrap
36
93 memcpy(out, A, 8);-
94 return inlen + 8;
executed 6 times by 1 test: return inlen + 8;
Executed by:
  • aes_wrap
6
95}-
96-
97int-
98AES_unwrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out,-
99 const unsigned char *in, unsigned int inlen)-
100{-
101 unsigned char *A, B[16], *R;-
102 unsigned int i, j, t;-
103 inlen -= 8;-
104 if (inlen & 0x7)
inlen & 0x7Description
TRUEnever evaluated
FALSEevaluated 6 times by 1 test
Evaluated by:
  • aes_wrap
0-6
105 return -1;
never executed: return -1;
0
106 if (inlen < 8)
inlen < 8Description
TRUEnever evaluated
FALSEevaluated 6 times by 1 test
Evaluated by:
  • aes_wrap
0-6
107 return -1;
never executed: return -1;
0
108 A = B;-
109 t = 6 * (inlen >> 3);-
110 memcpy(A, in, 8);-
111 memcpy(out, in + 8, inlen);-
112 for (j = 0; j < 6; j++) {
j < 6Description
TRUEevaluated 36 times by 1 test
Evaluated by:
  • aes_wrap
FALSEevaluated 6 times by 1 test
Evaluated by:
  • aes_wrap
6-36
113 R = out + inlen - 8;-
114 for (i = 0; i < inlen; i += 8, t--, R -= 8) {
i < inlenDescription
TRUEevaluated 96 times by 1 test
Evaluated by:
  • aes_wrap
FALSEevaluated 36 times by 1 test
Evaluated by:
  • aes_wrap
36-96
115 A[7] ^= (unsigned char)(t & 0xff);-
116 if (t > 0xff) {
t > 0xffDescription
TRUEnever evaluated
FALSEevaluated 96 times by 1 test
Evaluated by:
  • aes_wrap
0-96
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 }
never executed: end of block
0
121 memcpy(B + 8, R, 8);-
122 AES_decrypt(B, B, key);-
123 memcpy(R, B + 8, 8);-
124 }
executed 96 times by 1 test: end of block
Executed by:
  • aes_wrap
96
125 }
executed 36 times by 1 test: end of block
Executed by:
  • aes_wrap
36
126 if (!iv)
!ivDescription
TRUEevaluated 6 times by 1 test
Evaluated by:
  • aes_wrap
FALSEnever evaluated
0-6
127 iv = default_iv;
executed 6 times by 1 test: iv = default_iv;
Executed by:
  • aes_wrap
6
128 if (memcmp(A, iv, 8)) {
memcmp(A, iv, 8)Description
TRUEnever evaluated
FALSEevaluated 6 times by 1 test
Evaluated by:
  • aes_wrap
0-6
129 explicit_bzero(out, inlen);-
130 return 0;
never executed: return 0;
0
131 }-
132 return inlen;
executed 6 times by 1 test: return inlen;
Executed by:
  • aes_wrap
6
133}-
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