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
183
184
|
// SPDX-License-Identifier: CDDL-1.0
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or https://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/zfs_context.h>
#include <sys/crypto/common.h>
#include <sys/crypto/impl.h>
#include <sys/crypto/api.h>
#include <sys/crypto/spi.h>
#include <sys/crypto/sched_impl.h>
/*
* Encryption and decryption routines.
*/
/*
* crypto_encrypt()
*
* Arguments:
* sid: session id
* mech: crypto_mechanism_t pointer.
* mech_type is a valid value previously returned by
* crypto_mech2id();
* When the mech's parameter is not NULL, its definition depends
* on the standard definition of the mechanism.
* key: pointer to a crypto_key_t structure.
* plaintext: The message to be encrypted
* ciphertext: Storage for the encrypted message. The length needed
* depends on the mechanism, and the plaintext's size.
* tmpl: a crypto_ctx_template_t, opaque template of a context of an
* encryption with the 'mech' using 'key'. 'tmpl' is created by
* a previous call to crypto_create_ctx_template().
*
* Description:
* Asynchronously submits a request for, or synchronously performs a
* single-part encryption of 'plaintext' with the mechanism 'mech', using
* the key 'key'.
* When complete and successful, 'ciphertext' will contain the encrypted
* message.
* Relies on the KCF scheduler to pick a provider.
*
* Returns:
* See comment in the beginning of the file.
*/
int
crypto_encrypt(crypto_mechanism_t *mech, crypto_data_t *plaintext,
crypto_key_t *key, crypto_ctx_template_t tmpl, crypto_data_t *ciphertext)
{
int error;
kcf_mech_entry_t *me;
kcf_provider_desc_t *pd;
kcf_ctx_template_t *ctx_tmpl;
crypto_spi_ctx_template_t spi_ctx_tmpl = NULL;
kcf_prov_tried_t *list = NULL;
retry:
/* pd is returned held */
if ((pd = kcf_get_mech_provider(mech->cm_type, &me, &error,
list, CRYPTO_FG_ENCRYPT_ATOMIC)) == NULL) {
if (list != NULL)
kcf_free_triedlist(list);
return (error);
}
if (((ctx_tmpl = (kcf_ctx_template_t *)tmpl) != NULL))
spi_ctx_tmpl = ctx_tmpl->ct_prov_tmpl;
crypto_mechanism_t lmech = *mech;
KCF_SET_PROVIDER_MECHNUM(mech->cm_type, pd, &lmech);
error = KCF_PROV_ENCRYPT_ATOMIC(pd, &lmech, key,
plaintext, ciphertext, spi_ctx_tmpl);
if (error != CRYPTO_SUCCESS && IS_RECOVERABLE(error)) {
/* Add pd to the linked list of providers tried. */
if (kcf_insert_triedlist(&list, pd, KM_SLEEP) != NULL)
goto retry;
}
if (list != NULL)
kcf_free_triedlist(list);
KCF_PROV_REFRELE(pd);
return (error);
}
/*
* crypto_decrypt_prov()
*
* Arguments:
* pd: provider descriptor
* sid: session id
* mech: crypto_mechanism_t pointer.
* mech_type is a valid value previously returned by
* crypto_mech2id();
* When the mech's parameter is not NULL, its definition depends
* on the standard definition of the mechanism.
* key: pointer to a crypto_key_t structure.
* ciphertext: The message to be encrypted
* plaintext: Storage for the encrypted message. The length needed
* depends on the mechanism, and the plaintext's size.
* tmpl: a crypto_ctx_template_t, opaque template of a context of an
* encryption with the 'mech' using 'key'. 'tmpl' is created by
* a previous call to crypto_create_ctx_template().
*
* Description:
* Asynchronously submits a request for, or synchronously performs a
* single-part decryption of 'ciphertext' with the mechanism 'mech', using
* the key 'key'.
* When complete and successful, 'plaintext' will contain the decrypted
* message.
* Relies on the KCF scheduler to choose a provider.
*
* Returns:
* See comment in the beginning of the file.
*/
int
crypto_decrypt(crypto_mechanism_t *mech, crypto_data_t *ciphertext,
crypto_key_t *key, crypto_ctx_template_t tmpl, crypto_data_t *plaintext)
{
int error;
kcf_mech_entry_t *me;
kcf_provider_desc_t *pd;
kcf_ctx_template_t *ctx_tmpl;
crypto_spi_ctx_template_t spi_ctx_tmpl = NULL;
kcf_prov_tried_t *list = NULL;
retry:
/* pd is returned held */
if ((pd = kcf_get_mech_provider(mech->cm_type, &me, &error,
list, CRYPTO_FG_DECRYPT_ATOMIC)) == NULL) {
if (list != NULL)
kcf_free_triedlist(list);
return (error);
}
if (((ctx_tmpl = (kcf_ctx_template_t *)tmpl) != NULL))
spi_ctx_tmpl = ctx_tmpl->ct_prov_tmpl;
crypto_mechanism_t lmech = *mech;
KCF_SET_PROVIDER_MECHNUM(mech->cm_type, pd, &lmech);
error = KCF_PROV_DECRYPT_ATOMIC(pd, &lmech, key,
ciphertext, plaintext, spi_ctx_tmpl);
if (error != CRYPTO_SUCCESS && IS_RECOVERABLE(error)) {
/* Add pd to the linked list of providers tried. */
if (kcf_insert_triedlist(&list, pd, KM_SLEEP) != NULL)
goto retry;
}
if (list != NULL)
kcf_free_triedlist(list);
KCF_PROV_REFRELE(pd);
return (error);
}
#if defined(_KERNEL)
EXPORT_SYMBOL(crypto_encrypt);
EXPORT_SYMBOL(crypto_decrypt);
#endif
|
