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aes_ige.c

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1/* $OpenBSD: aes_ige.c,v 1.7 2015/02/10 09:46:30 miod Exp $ */-
2/* ====================================================================-
3 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.-
4 *-
5 * Redistribution and use in source and binary forms, with or without-
6 * modification, are permitted provided that the following conditions-
7 * are met:-
8 *-
9 * 1. Redistributions of source code must retain the above copyright-
10 * notice, this list of conditions and the following disclaimer. -
11 *-
12 * 2. Redistributions in binary form must reproduce the above copyright-
13 * notice, this list of conditions and the following disclaimer in-
14 * the documentation and/or other materials provided with the-
15 * distribution.-
16 *-
17 * 3. All advertising materials mentioning features or use of this-
18 * software must display the following acknowledgment:-
19 * "This product includes software developed by the OpenSSL Project-
20 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"-
21 *-
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to-
23 * endorse or promote products derived from this software without-
24 * prior written permission. For written permission, please contact-
25 * openssl-core@openssl.org.-
26 *-
27 * 5. Products derived from this software may not be called "OpenSSL"-
28 * nor may "OpenSSL" appear in their names without prior written-
29 * permission of the OpenSSL Project.-
30 *-
31 * 6. Redistributions of any form whatsoever must retain the following-
32 * acknowledgment:-
33 * "This product includes software developed by the OpenSSL Project-
34 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"-
35 *-
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY-
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE-
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR-
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR-
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,-
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;-
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)-
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,-
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)-
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED-
47 * OF THE POSSIBILITY OF SUCH DAMAGE.-
48 * ====================================================================-
49 *-
50 */-
51-
52#include <openssl/aes.h>-
53#include <openssl/crypto.h>-
54-
55#include "aes_locl.h"-
56-
57#define N_WORDS (AES_BLOCK_SIZE / sizeof(unsigned long))-
58typedef struct {-
59 unsigned long data[N_WORDS];-
60} aes_block_t;-
61-
62/* XXX: probably some better way to do this */-
63#if defined(__i386__) || defined(__x86_64__)-
64#define UNALIGNED_MEMOPS_ARE_FAST 1-
65#else-
66#define UNALIGNED_MEMOPS_ARE_FAST 0-
67#endif-
68-
69#if UNALIGNED_MEMOPS_ARE_FAST-
70#define load_block(d, s) (d) = *(const aes_block_t *)(s)-
71#define store_block(d, s) *(aes_block_t *)(d) = (s)-
72#else-
73#define load_block(d, s) memcpy((d).data, (s), AES_BLOCK_SIZE)-
74#define store_block(d, s) memcpy((d), (s).data, AES_BLOCK_SIZE)-
75#endif-
76-
77/* N.B. The IV for this mode is _twice_ the block size */-
78-
79void-
80AES_ige_encrypt(const unsigned char *in, unsigned char *out, size_t length,-
81 const AES_KEY *key, unsigned char *ivec, const int enc)-
82{-
83 size_t n;-
84 size_t len;-
85-
86 OPENSSL_assert((length % AES_BLOCK_SIZE) == 0);-
87-
88 len = length / AES_BLOCK_SIZE;-
89-
90 if (AES_ENCRYPT == enc) {
1 == encDescription
TRUEevaluated 11 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 10 times by 1 test
Evaluated by:
  • igetest
10-11
91 if (in != out && (UNALIGNED_MEMOPS_ARE_FAST ||
in != outDescription
TRUEevaluated 10 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 1 time by 1 test
Evaluated by:
  • igetest
1-10
92 ((size_t)in|(size_t)out|(size_t)ivec) %
dead code: ((size_t)in|(size_t)out|(size_t)ivec) % sizeof(long) == 0
-
93 sizeof(long) == 0)) {
dead code: ((size_t)in|(size_t)out|(size_t)ivec) % sizeof(long) == 0
-
94 aes_block_t *ivp = (aes_block_t *)ivec;-
95 aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE);-
96-
97 while (len) {
lenDescription
TRUEevaluated 2586 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 10 times by 1 test
Evaluated by:
  • igetest
10-2586
98 aes_block_t *inp = (aes_block_t *)in;-
99 aes_block_t *outp = (aes_block_t *)out;-
100-
101 for (n = 0; n < N_WORDS; ++n)
n < (16 / size...nsigned long))Description
TRUEevaluated 5172 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 2586 times by 1 test
Evaluated by:
  • igetest
2586-5172
102 outp->data[n] = inp->data[n] ^ ivp->data[n];
executed 5172 times by 1 test: outp->data[n] = inp->data[n] ^ ivp->data[n];
Executed by:
  • igetest
5172
103 AES_encrypt((unsigned char *)outp->data, (unsigned char *)outp->data, key);-
104 for (n = 0; n < N_WORDS; ++n)
n < (16 / size...nsigned long))Description
TRUEevaluated 5172 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 2586 times by 1 test
Evaluated by:
  • igetest
2586-5172
105 outp->data[n] ^= iv2p->data[n];
executed 5172 times by 1 test: outp->data[n] ^= iv2p->data[n];
Executed by:
  • igetest
5172
106 ivp = outp;-
107 iv2p = inp;-
108 --len;-
109 in += AES_BLOCK_SIZE;-
110 out += AES_BLOCK_SIZE;-
111 }
executed 2586 times by 1 test: end of block
Executed by:
  • igetest
2586
112 memcpy(ivec, ivp->data, AES_BLOCK_SIZE);-
113 memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);-
114 } else {
executed 10 times by 1 test: end of block
Executed by:
  • igetest
10
115 aes_block_t tmp, tmp2;-
116 aes_block_t iv;-
117 aes_block_t iv2;-
118-
119 load_block(iv, ivec);-
120 load_block(iv2, ivec + AES_BLOCK_SIZE);-
121-
122 while (len) {
lenDescription
TRUEevaluated 2 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 1 time by 1 test
Evaluated by:
  • igetest
1-2
123 load_block(tmp, in);-
124 for (n = 0; n < N_WORDS; ++n)
n < (16 / size...nsigned long))Description
TRUEevaluated 4 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 2 times by 1 test
Evaluated by:
  • igetest
2-4
125 tmp2.data[n] = tmp.data[n] ^ iv.data[n];
executed 4 times by 1 test: tmp2.data[n] = tmp.data[n] ^ iv.data[n];
Executed by:
  • igetest
4
126 AES_encrypt((unsigned char *)tmp2.data,-
127 (unsigned char *)tmp2.data, key);-
128 for (n = 0; n < N_WORDS; ++n)
n < (16 / size...nsigned long))Description
TRUEevaluated 4 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 2 times by 1 test
Evaluated by:
  • igetest
2-4
129 tmp2.data[n] ^= iv2.data[n];
executed 4 times by 1 test: tmp2.data[n] ^= iv2.data[n];
Executed by:
  • igetest
4
130 store_block(out, tmp2);-
131 iv = tmp2;-
132 iv2 = tmp;-
133 --len;-
134 in += AES_BLOCK_SIZE;-
135 out += AES_BLOCK_SIZE;-
136 }
executed 2 times by 1 test: end of block
Executed by:
  • igetest
2
137 memcpy(ivec, iv.data, AES_BLOCK_SIZE);-
138 memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);-
139 }
executed 1 time by 1 test: end of block
Executed by:
  • igetest
1
140 } else {-
141 if (in != out && (UNALIGNED_MEMOPS_ARE_FAST ||
in != outDescription
TRUEevaluated 9 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 1 time by 1 test
Evaluated by:
  • igetest
1-9
142 ((size_t)in|(size_t)out|(size_t)ivec) %
dead code: ((size_t)in|(size_t)out|(size_t)ivec) % sizeof(long) == 0
-
143 sizeof(long) == 0)) {
dead code: ((size_t)in|(size_t)out|(size_t)ivec) % sizeof(long) == 0
-
144 aes_block_t *ivp = (aes_block_t *)ivec;-
145 aes_block_t *iv2p = (aes_block_t *)(ivec + AES_BLOCK_SIZE);-
146-
147 while (len) {
lenDescription
TRUEevaluated 2586 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 9 times by 1 test
Evaluated by:
  • igetest
9-2586
148 aes_block_t tmp;-
149 aes_block_t *inp = (aes_block_t *)in;-
150 aes_block_t *outp = (aes_block_t *)out;-
151-
152 for (n = 0; n < N_WORDS; ++n)
n < (16 / size...nsigned long))Description
TRUEevaluated 5172 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 2586 times by 1 test
Evaluated by:
  • igetest
2586-5172
153 tmp.data[n] = inp->data[n] ^ iv2p->data[n];
executed 5172 times by 1 test: tmp.data[n] = inp->data[n] ^ iv2p->data[n];
Executed by:
  • igetest
5172
154 AES_decrypt((unsigned char *)tmp.data,-
155 (unsigned char *)outp->data, key);-
156 for (n = 0; n < N_WORDS; ++n)
n < (16 / size...nsigned long))Description
TRUEevaluated 5172 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 2586 times by 1 test
Evaluated by:
  • igetest
2586-5172
157 outp->data[n] ^= ivp->data[n];
executed 5172 times by 1 test: outp->data[n] ^= ivp->data[n];
Executed by:
  • igetest
5172
158 ivp = inp;-
159 iv2p = outp;-
160 --len;-
161 in += AES_BLOCK_SIZE;-
162 out += AES_BLOCK_SIZE;-
163 }
executed 2586 times by 1 test: end of block
Executed by:
  • igetest
2586
164 memcpy(ivec, ivp->data, AES_BLOCK_SIZE);-
165 memcpy(ivec + AES_BLOCK_SIZE, iv2p->data, AES_BLOCK_SIZE);-
166 } else {
executed 9 times by 1 test: end of block
Executed by:
  • igetest
9
167 aes_block_t tmp, tmp2;-
168 aes_block_t iv;-
169 aes_block_t iv2;-
170-
171 load_block(iv, ivec);-
172 load_block(iv2, ivec + AES_BLOCK_SIZE);-
173-
174 while (len) {
lenDescription
TRUEevaluated 2 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 1 time by 1 test
Evaluated by:
  • igetest
1-2
175 load_block(tmp, in);-
176 tmp2 = tmp;-
177 for (n = 0; n < N_WORDS; ++n)
n < (16 / size...nsigned long))Description
TRUEevaluated 4 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 2 times by 1 test
Evaluated by:
  • igetest
2-4
178 tmp.data[n] ^= iv2.data[n];
executed 4 times by 1 test: tmp.data[n] ^= iv2.data[n];
Executed by:
  • igetest
4
179 AES_decrypt((unsigned char *)tmp.data,-
180 (unsigned char *)tmp.data, key);-
181 for (n = 0; n < N_WORDS; ++n)
n < (16 / size...nsigned long))Description
TRUEevaluated 4 times by 1 test
Evaluated by:
  • igetest
FALSEevaluated 2 times by 1 test
Evaluated by:
  • igetest
2-4
182 tmp.data[n] ^= iv.data[n];
executed 4 times by 1 test: tmp.data[n] ^= iv.data[n];
Executed by:
  • igetest
4
183 store_block(out, tmp);-
184 iv = tmp2;-
185 iv2 = tmp;-
186 --len;-
187 in += AES_BLOCK_SIZE;-
188 out += AES_BLOCK_SIZE;-
189 }
executed 2 times by 1 test: end of block
Executed by:
  • igetest
2
190 memcpy(ivec, iv.data, AES_BLOCK_SIZE);-
191 memcpy(ivec + AES_BLOCK_SIZE, iv2.data, AES_BLOCK_SIZE);-
192 }
executed 1 time by 1 test: end of block
Executed by:
  • igetest
1
193 }-
194}-
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