1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*-
* Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS 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 AUTHORS OR 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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <opencrypto/cryptosoft.h> /* for hmac_ipad_buffer and hmac_opad_buffer */
#include <opencrypto/xform.h>
#include "glxsb.h"
/*
* Implementation notes.
*
* The Geode LX Security Block provides AES-128-CBC acceleration.
* We implement all HMAC algorithms provided by crypto(9) framework so glxsb can work
* with ipsec(4)
*
* This code was stolen from crypto/via/padlock_hash.c
*/
MALLOC_DECLARE(M_GLXSB);
static void
glxsb_hash_key_setup(struct glxsb_session *ses, caddr_t key, int klen)
{
struct auth_hash *axf;
int i;
klen /= 8;
axf = ses->ses_axf;
for (i = 0; i < klen; i++)
key[i] ^= HMAC_IPAD_VAL;
axf->Init(ses->ses_ictx);
axf->Update(ses->ses_ictx, key, klen);
axf->Update(ses->ses_ictx, hmac_ipad_buffer, axf->blocksize - klen);
for (i = 0; i < klen; i++)
key[i] ^= (HMAC_IPAD_VAL ^ HMAC_OPAD_VAL);
axf->Init(ses->ses_octx);
axf->Update(ses->ses_octx, key, klen);
axf->Update(ses->ses_octx, hmac_opad_buffer, axf->blocksize - klen);
for (i = 0; i < klen; i++)
key[i] ^= HMAC_OPAD_VAL;
}
/*
* Compute keyed-hash authenticator.
*/
static int
glxsb_authcompute(struct glxsb_session *ses, struct cryptodesc *crd,
caddr_t buf, int flags)
{
u_char hash[HASH_MAX_LEN];
struct auth_hash *axf;
union authctx ctx;
int error;
axf = ses->ses_axf;
bcopy(ses->ses_ictx, &ctx, axf->ctxsize);
error = crypto_apply(flags, buf, crd->crd_skip, crd->crd_len,
(int (*)(void *, void *, unsigned int))axf->Update, (caddr_t)&ctx);
if (error != 0)
return (error);
axf->Final(hash, &ctx);
bcopy(ses->ses_octx, &ctx, axf->ctxsize);
axf->Update(&ctx, hash, axf->hashsize);
axf->Final(hash, &ctx);
/* Inject the authentication data */
crypto_copyback(flags, buf, crd->crd_inject,
ses->ses_mlen == 0 ? axf->hashsize : ses->ses_mlen, hash);
return (0);
}
int
glxsb_hash_setup(struct glxsb_session *ses, struct cryptoini *macini)
{
ses->ses_mlen = macini->cri_mlen;
/* Find software structure which describes HMAC algorithm. */
switch (macini->cri_alg) {
case CRYPTO_NULL_HMAC:
ses->ses_axf = &auth_hash_null;
break;
case CRYPTO_MD5_HMAC:
ses->ses_axf = &auth_hash_hmac_md5;
break;
case CRYPTO_SHA1_HMAC:
ses->ses_axf = &auth_hash_hmac_sha1;
break;
case CRYPTO_RIPEMD160_HMAC:
ses->ses_axf = &auth_hash_hmac_ripemd_160;
break;
case CRYPTO_SHA2_256_HMAC:
ses->ses_axf = &auth_hash_hmac_sha2_256;
break;
case CRYPTO_SHA2_384_HMAC:
ses->ses_axf = &auth_hash_hmac_sha2_384;
break;
case CRYPTO_SHA2_512_HMAC:
ses->ses_axf = &auth_hash_hmac_sha2_512;
break;
}
/* Allocate memory for HMAC inner and outer contexts. */
ses->ses_ictx = malloc(ses->ses_axf->ctxsize, M_GLXSB,
M_ZERO | M_NOWAIT);
ses->ses_octx = malloc(ses->ses_axf->ctxsize, M_GLXSB,
M_ZERO | M_NOWAIT);
if (ses->ses_ictx == NULL || ses->ses_octx == NULL)
return (ENOMEM);
/* Setup key if given. */
if (macini->cri_key != NULL) {
glxsb_hash_key_setup(ses, macini->cri_key,
macini->cri_klen);
}
return (0);
}
int
glxsb_hash_process(struct glxsb_session *ses, struct cryptodesc *maccrd,
struct cryptop *crp)
{
int error;
if ((maccrd->crd_flags & CRD_F_KEY_EXPLICIT) != 0)
glxsb_hash_key_setup(ses, maccrd->crd_key, maccrd->crd_klen);
error = glxsb_authcompute(ses, maccrd, crp->crp_buf, crp->crp_flags);
return (error);
}
void
glxsb_hash_free(struct glxsb_session *ses)
{
if (ses->ses_ictx != NULL) {
bzero(ses->ses_ictx, ses->ses_axf->ctxsize);
free(ses->ses_ictx, M_GLXSB);
ses->ses_ictx = NULL;
}
if (ses->ses_octx != NULL) {
bzero(ses->ses_octx, ses->ses_axf->ctxsize);
free(ses->ses_octx, M_GLXSB);
ses->ses_octx = NULL;
}
}
|
