1 | /* arc4.c
|
---|
2 | *
|
---|
3 | * Copyright (C) 2006-2015 wolfSSL Inc.
|
---|
4 | *
|
---|
5 | * This file is part of wolfSSL. (formerly known as CyaSSL)
|
---|
6 | *
|
---|
7 | * wolfSSL is free software; you can redistribute it and/or modify
|
---|
8 | * it under the terms of the GNU General Public License as published by
|
---|
9 | * the Free Software Foundation; either version 2 of the License, or
|
---|
10 | * (at your option) any later version.
|
---|
11 | *
|
---|
12 | * wolfSSL is distributed in the hope that it will be useful,
|
---|
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
---|
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
---|
15 | * GNU General Public License for more details.
|
---|
16 | *
|
---|
17 | * You should have received a copy of the GNU General Public License
|
---|
18 | * along with this program; if not, write to the Free Software
|
---|
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|
---|
20 | */
|
---|
21 |
|
---|
22 | #ifdef HAVE_CONFIG_H
|
---|
23 | #include <config.h>
|
---|
24 | #endif
|
---|
25 |
|
---|
26 | #include <wolfssl/wolfcrypt/settings.h>
|
---|
27 |
|
---|
28 | #ifndef NO_RC4
|
---|
29 |
|
---|
30 | #include <wolfssl/wolfcrypt/arc4.h>
|
---|
31 |
|
---|
32 | #ifdef HAVE_CAVIUM
|
---|
33 | static void wc_Arc4CaviumSetKey(Arc4* arc4, const byte* key, word32 length);
|
---|
34 | static void wc_Arc4CaviumProcess(Arc4* arc4, byte* out, const byte* in,
|
---|
35 | word32 length);
|
---|
36 | #endif
|
---|
37 |
|
---|
38 |
|
---|
39 | void wc_Arc4SetKey(Arc4* arc4, const byte* key, word32 length)
|
---|
40 | {
|
---|
41 | word32 i;
|
---|
42 | word32 keyIndex = 0, stateIndex = 0;
|
---|
43 |
|
---|
44 | #ifdef HAVE_CAVIUM
|
---|
45 | if (arc4->magic == WOLFSSL_ARC4_CAVIUM_MAGIC)
|
---|
46 | return wc_Arc4CaviumSetKey(arc4, key, length);
|
---|
47 | #endif
|
---|
48 |
|
---|
49 | arc4->x = 1;
|
---|
50 | arc4->y = 0;
|
---|
51 |
|
---|
52 | for (i = 0; i < ARC4_STATE_SIZE; i++)
|
---|
53 | arc4->state[i] = (byte)i;
|
---|
54 |
|
---|
55 | for (i = 0; i < ARC4_STATE_SIZE; i++) {
|
---|
56 | word32 a = arc4->state[i];
|
---|
57 | stateIndex += key[keyIndex] + a;
|
---|
58 | stateIndex &= 0xFF;
|
---|
59 | arc4->state[i] = arc4->state[stateIndex];
|
---|
60 | arc4->state[stateIndex] = (byte)a;
|
---|
61 |
|
---|
62 | if (++keyIndex >= length)
|
---|
63 | keyIndex = 0;
|
---|
64 | }
|
---|
65 | }
|
---|
66 |
|
---|
67 |
|
---|
68 | static INLINE byte MakeByte(word32* x, word32* y, byte* s)
|
---|
69 | {
|
---|
70 | word32 a = s[*x], b;
|
---|
71 | *y = (*y+a) & 0xff;
|
---|
72 |
|
---|
73 | b = s[*y];
|
---|
74 | s[*x] = (byte)b;
|
---|
75 | s[*y] = (byte)a;
|
---|
76 | *x = (*x+1) & 0xff;
|
---|
77 |
|
---|
78 | return s[(a+b) & 0xff];
|
---|
79 | }
|
---|
80 |
|
---|
81 |
|
---|
82 | void wc_Arc4Process(Arc4* arc4, byte* out, const byte* in, word32 length)
|
---|
83 | {
|
---|
84 | word32 x;
|
---|
85 | word32 y;
|
---|
86 |
|
---|
87 | #ifdef HAVE_CAVIUM
|
---|
88 | if (arc4->magic == WOLFSSL_ARC4_CAVIUM_MAGIC)
|
---|
89 | return wc_Arc4CaviumProcess(arc4, out, in, length);
|
---|
90 | #endif
|
---|
91 |
|
---|
92 | x = arc4->x;
|
---|
93 | y = arc4->y;
|
---|
94 |
|
---|
95 | while(length--)
|
---|
96 | *out++ = *in++ ^ MakeByte(&x, &y, arc4->state);
|
---|
97 |
|
---|
98 | arc4->x = (byte)x;
|
---|
99 | arc4->y = (byte)y;
|
---|
100 | }
|
---|
101 |
|
---|
102 |
|
---|
103 | #ifdef HAVE_CAVIUM
|
---|
104 |
|
---|
105 | #include <wolfssl/wolfcrypt/logging.h>
|
---|
106 | #include "cavium_common.h"
|
---|
107 |
|
---|
108 | /* Initiliaze Arc4 for use with Nitrox device */
|
---|
109 | int wc_Arc4InitCavium(Arc4* arc4, int devId)
|
---|
110 | {
|
---|
111 | if (arc4 == NULL)
|
---|
112 | return -1;
|
---|
113 |
|
---|
114 | if (CspAllocContext(CONTEXT_SSL, &arc4->contextHandle, devId) != 0)
|
---|
115 | return -1;
|
---|
116 |
|
---|
117 | arc4->devId = devId;
|
---|
118 | arc4->magic = WOLFSSL_ARC4_CAVIUM_MAGIC;
|
---|
119 |
|
---|
120 | return 0;
|
---|
121 | }
|
---|
122 |
|
---|
123 |
|
---|
124 | /* Free Arc4 from use with Nitrox device */
|
---|
125 | void wc_Arc4FreeCavium(Arc4* arc4)
|
---|
126 | {
|
---|
127 | if (arc4 == NULL)
|
---|
128 | return;
|
---|
129 |
|
---|
130 | if (arc4->magic != WOLFSSL_ARC4_CAVIUM_MAGIC)
|
---|
131 | return;
|
---|
132 |
|
---|
133 | CspFreeContext(CONTEXT_SSL, arc4->contextHandle, arc4->devId);
|
---|
134 | arc4->magic = 0;
|
---|
135 | }
|
---|
136 |
|
---|
137 |
|
---|
138 | static void wc_Arc4CaviumSetKey(Arc4* arc4, const byte* key, word32 length)
|
---|
139 | {
|
---|
140 | word32 requestId;
|
---|
141 |
|
---|
142 | if (CspInitializeRc4(CAVIUM_BLOCKING, arc4->contextHandle, length,
|
---|
143 | (byte*)key, &requestId, arc4->devId) != 0) {
|
---|
144 | WOLFSSL_MSG("Bad Cavium Arc4 Init");
|
---|
145 | }
|
---|
146 | }
|
---|
147 |
|
---|
148 |
|
---|
149 | static void wc_Arc4CaviumProcess(Arc4* arc4, byte* out, const byte* in,
|
---|
150 | word32 length)
|
---|
151 | {
|
---|
152 | wolfssl_word offset = 0;
|
---|
153 | word32 requestId;
|
---|
154 |
|
---|
155 | while (length > WOLFSSL_MAX_16BIT) {
|
---|
156 | word16 slen = (word16)WOLFSSL_MAX_16BIT;
|
---|
157 | if (CspEncryptRc4(CAVIUM_BLOCKING, arc4->contextHandle,CAVIUM_UPDATE,
|
---|
158 | slen, (byte*)in + offset, out + offset, &requestId,
|
---|
159 | arc4->devId) != 0) {
|
---|
160 | WOLFSSL_MSG("Bad Cavium Arc4 Encrypt");
|
---|
161 | }
|
---|
162 | length -= WOLFSSL_MAX_16BIT;
|
---|
163 | offset += WOLFSSL_MAX_16BIT;
|
---|
164 | }
|
---|
165 | if (length) {
|
---|
166 | word16 slen = (word16)length;
|
---|
167 | if (CspEncryptRc4(CAVIUM_BLOCKING, arc4->contextHandle,CAVIUM_UPDATE,
|
---|
168 | slen, (byte*)in + offset, out + offset, &requestId,
|
---|
169 | arc4->devId) != 0) {
|
---|
170 | WOLFSSL_MSG("Bad Cavium Arc4 Encrypt");
|
---|
171 | }
|
---|
172 | }
|
---|
173 | }
|
---|
174 |
|
---|
175 | #endif /* HAVE_CAVIUM */
|
---|
176 |
|
---|
177 | #endif /* NO_RC4 */
|
---|
178 |
|
---|