1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <sys/errno.h>
27 #include <sys/types.h>
28 #include <sys/systm.h>
29 #include <sys/kmem.h>
30 #include <sys/crypto/common.h>
31 #include <sys/crypto/impl.h>
32 #include <sys/crypto/api.h>
33 #include <sys/crypto/spi.h>
34 #include <sys/crypto/sched_impl.h>
35
36 /*
37 * Crypto contexts manipulation routines
38 */
39
40 /*
41 * crypto_create_ctx_template()
42 *
43 * Arguments:
44 *
45 * mech: crypto_mechanism_t pointer.
46 * mech_type is a valid value previously returned by
47 * crypto_mech2id();
48 * When the mech's parameter is not NULL, its definition depends
49 * on the standard definition of the mechanism.
50 * key: pointer to a crypto_key_t structure.
51 * ptmpl: a storage for the opaque crypto_ctx_template_t, allocated and
52 * initialized by the software provider this routine is
53 * dispatched to.
54 * kmflag: KM_SLEEP/KM_NOSLEEP mem. alloc. flag.
55 *
56 * Description:
57 * Redirects the call to the software provider of the specified
58 * mechanism. That provider will allocate and pre-compute/pre-expand
59 * the context template, reusable by later calls to crypto_xxx_init().
60 * The size and address of that provider context template are stored
61 * in an internal structure, kcf_ctx_template_t. The address of that
62 * structure is given back to the caller in *ptmpl.
63 *
64 * Context:
65 * Process or interrupt.
66 *
67 * Returns:
68 * CRYPTO_SUCCESS when the context template is successfully created.
69 * CRYPTO_HOST_MEMEORY: mem alloc failure
70 * CRYPTO_ARGUMENTS_BAD: NULL storage for the ctx template.
71 * RYPTO_MECHANISM_INVALID: invalid mechanism 'mech'.
72 */
73 int
crypto_create_ctx_template(crypto_mechanism_t * mech,crypto_key_t * key,crypto_ctx_template_t * ptmpl,int kmflag)74 crypto_create_ctx_template(crypto_mechanism_t *mech, crypto_key_t *key,
75 crypto_ctx_template_t *ptmpl, int kmflag)
76 {
77 int error;
78 kcf_mech_entry_t *me;
79 kcf_provider_desc_t *pd;
80 kcf_ctx_template_t *ctx_tmpl;
81 crypto_mechanism_t prov_mech;
82
83 /* A few args validation */
84
85 if (ptmpl == NULL)
86 return (CRYPTO_ARGUMENTS_BAD);
87
88 if (mech == NULL)
89 return (CRYPTO_MECHANISM_INVALID);
90
91 error = kcf_get_sw_prov(mech->cm_type, &pd, &me, B_TRUE);
92 if (error != CRYPTO_SUCCESS)
93 return (error);
94
95 if ((ctx_tmpl = (kcf_ctx_template_t *)kmem_alloc(
96 sizeof (kcf_ctx_template_t), kmflag)) == NULL) {
97 KCF_PROV_REFRELE(pd);
98 return (CRYPTO_HOST_MEMORY);
99 }
100
101 /* Pass a mechtype that the provider understands */
102 prov_mech.cm_type = KCF_TO_PROV_MECHNUM(pd, mech->cm_type);
103 prov_mech.cm_param = mech->cm_param;
104 prov_mech.cm_param_len = mech->cm_param_len;
105
106 error = KCF_PROV_CREATE_CTX_TEMPLATE(pd, &prov_mech, key,
107 &(ctx_tmpl->ct_prov_tmpl), &(ctx_tmpl->ct_size), KCF_RHNDL(kmflag));
108
109 if (error == CRYPTO_SUCCESS) {
110 ctx_tmpl->ct_generation = me->me_gen_swprov;
111 *ptmpl = ctx_tmpl;
112 } else {
113 kmem_free(ctx_tmpl, sizeof (kcf_ctx_template_t));
114 }
115 KCF_PROV_REFRELE(pd);
116
117 return (error);
118 }
119
120 /*
121 * crypto_destroy_ctx_template()
122 *
123 * Arguments:
124 *
125 * tmpl: an opaque crypto_ctx_template_t previously created by
126 * crypto_create_ctx_template()
127 *
128 * Description:
129 * Frees the inbedded crypto_spi_ctx_template_t, then the
130 * kcf_ctx_template_t.
131 *
132 * Context:
133 * Process or interrupt.
134 *
135 */
136 void
crypto_destroy_ctx_template(crypto_ctx_template_t tmpl)137 crypto_destroy_ctx_template(crypto_ctx_template_t tmpl)
138 {
139 kcf_ctx_template_t *ctx_tmpl = (kcf_ctx_template_t *)tmpl;
140
141 if (ctx_tmpl == NULL)
142 return;
143
144 ASSERT(ctx_tmpl->ct_prov_tmpl != NULL);
145
146 bzero(ctx_tmpl->ct_prov_tmpl, ctx_tmpl->ct_size);
147 kmem_free(ctx_tmpl->ct_prov_tmpl, ctx_tmpl->ct_size);
148 kmem_free(ctx_tmpl, sizeof (kcf_ctx_template_t));
149 }
150