1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2015 Nexenta Systems, Inc. All rights reserved.
14 */
15
16 /*
17 * Helper functions for SMB1 signing using the
18 * Kernel Cryptographic Framework (KCF)
19 *
20 * There are two implementations of these functions:
21 * This one (for kernel) and another for user space:
22 * See: lib/smbsrv/libfksmbsrv/common/fksmb_sign_pkcs.c
23 */
24
25 #include <sys/types.h>
26 #include <sys/kmem.h>
27 #include <sys/crypto/api.h>
28 #include <smbsrv/smb_kproto.h>
29 #include <smbsrv/smb_signing.h>
30
31 /*
32 * SMB1 signing helpers:
33 * (getmech, init, update, final)
34 */
35
36 int
smb_md5_getmech(smb_sign_mech_t * mech)37 smb_md5_getmech(smb_sign_mech_t *mech)
38 {
39 crypto_mech_type_t t;
40
41 t = crypto_mech2id(SUN_CKM_MD5);
42 if (t == CRYPTO_MECH_INVALID)
43 return (-1);
44 mech->cm_type = t;
45 return (0);
46 }
47
48 /*
49 * Start the KCF session, load the key
50 */
51 int
smb_md5_init(smb_sign_ctx_t * ctxp,smb_sign_mech_t * mech)52 smb_md5_init(smb_sign_ctx_t *ctxp, smb_sign_mech_t *mech)
53 {
54 int rv;
55
56 rv = crypto_digest_init(mech, ctxp, NULL);
57
58 return (rv == CRYPTO_SUCCESS ? 0 : -1);
59 }
60
61 /*
62 * Digest one segment
63 */
64 int
smb_md5_update(smb_sign_ctx_t ctx,void * buf,size_t len)65 smb_md5_update(smb_sign_ctx_t ctx, void *buf, size_t len)
66 {
67 crypto_data_t data;
68 int rv;
69
70 bzero(&data, sizeof (data));
71 data.cd_format = CRYPTO_DATA_RAW;
72 data.cd_length = len;
73 data.cd_raw.iov_base = buf;
74 data.cd_raw.iov_len = len;
75
76 rv = crypto_digest_update(ctx, &data, 0);
77
78 return (rv == CRYPTO_SUCCESS ? 0 : -1);
79 }
80
81 /*
82 * Get the final digest.
83 */
84 int
smb_md5_final(smb_sign_ctx_t ctx,uint8_t * digest16)85 smb_md5_final(smb_sign_ctx_t ctx, uint8_t *digest16)
86 {
87 crypto_data_t out;
88 int rv;
89
90 bzero(&out, sizeof (out));
91 out.cd_format = CRYPTO_DATA_RAW;
92 out.cd_length = MD5_DIGEST_LENGTH;
93 out.cd_raw.iov_len = MD5_DIGEST_LENGTH;
94 out.cd_raw.iov_base = (void *)digest16;
95
96 rv = crypto_digest_final(ctx, &out, 0);
97
98 return (rv == CRYPTO_SUCCESS ? 0 : -1);
99 }
100