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
|
/*
* Copyright (c) 1997 - 2008 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* 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.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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 "krb5_locl.h"
/*
* AES
*/
static struct _krb5_key_type keytype_aes128_sha1 = {
KRB5_ENCTYPE_AES128_CTS_HMAC_SHA1_96,
"aes-128",
128,
16,
sizeof(struct _krb5_evp_schedule),
NULL,
_krb5_evp_schedule,
_krb5_AES_SHA1_salt,
NULL,
_krb5_evp_cleanup,
EVP_aes_128_cbc
};
static struct _krb5_key_type keytype_aes256_sha1 = {
KRB5_ENCTYPE_AES256_CTS_HMAC_SHA1_96,
"aes-256",
256,
32,
sizeof(struct _krb5_evp_schedule),
NULL,
_krb5_evp_schedule,
_krb5_AES_SHA1_salt,
NULL,
_krb5_evp_cleanup,
EVP_aes_256_cbc
};
struct _krb5_checksum_type _krb5_checksum_hmac_sha1_aes128 = {
CKSUMTYPE_HMAC_SHA1_96_AES_128,
"hmac-sha1-96-aes128",
64,
12,
F_KEYED | F_CPROOF | F_DERIVED,
_krb5_SP_HMAC_SHA1_checksum,
_krb5_SP_HMAC_SHA1_verify
};
struct _krb5_checksum_type _krb5_checksum_hmac_sha1_aes256 = {
CKSUMTYPE_HMAC_SHA1_96_AES_256,
"hmac-sha1-96-aes256",
64,
12,
F_KEYED | F_CPROOF | F_DERIVED,
_krb5_SP_HMAC_SHA1_checksum,
_krb5_SP_HMAC_SHA1_verify
};
static krb5_error_code
AES_SHA1_PRF(krb5_context context,
krb5_crypto crypto,
const krb5_data *in,
krb5_data *out)
{
struct _krb5_checksum_type *ct = crypto->et->checksum;
struct krb5_crypto_iov iov[1];
krb5_error_code ret;
Checksum result;
krb5_keyblock *derived;
result.cksumtype = ct->type;
ret = krb5_data_alloc(&result.checksum, ct->checksumsize);
if (ret) {
krb5_set_error_message(context, ret, N_("malloc: out memory", ""));
return ret;
}
iov[0].data = *in;
iov[0].flags = KRB5_CRYPTO_TYPE_DATA;
ret = (*ct->checksum)(context, crypto, NULL, 0, iov, 1, &result);
if (ret) {
krb5_data_free(&result.checksum);
return ret;
}
if (result.checksum.length < crypto->et->blocksize)
krb5_abortx(context, "internal prf error");
derived = NULL;
ret = krb5_derive_key(context, crypto->key.key,
crypto->et->type, "prf", 3, &derived);
if (ret)
krb5_abortx(context, "krb5_derive_key");
ret = krb5_data_alloc(out, crypto->et->blocksize);
if (ret)
krb5_abortx(context, "malloc failed");
{
const EVP_CIPHER *c = (*crypto->et->keytype->evp)();
EVP_CIPHER_CTX ctx;
EVP_CIPHER_CTX_init(&ctx); /* ivec all zero */
EVP_CipherInit_ex(&ctx, c, NULL, derived->keyvalue.data, NULL, 1);
EVP_Cipher(&ctx, out->data, result.checksum.data,
crypto->et->blocksize);
EVP_CIPHER_CTX_cleanup(&ctx);
}
krb5_data_free(&result.checksum);
krb5_free_keyblock(context, derived);
return ret;
}
struct _krb5_encryption_type _krb5_enctype_aes128_cts_hmac_sha1 = {
ETYPE_AES128_CTS_HMAC_SHA1_96,
"aes128-cts-hmac-sha1-96",
"aes128-cts",
16,
1,
16,
&keytype_aes128_sha1,
&_krb5_checksum_sha1,
&_krb5_checksum_hmac_sha1_aes128,
F_DERIVED | F_RFC3961_ENC | F_RFC3961_KDF,
_krb5_evp_encrypt_cts,
_krb5_evp_encrypt_iov_cts,
16,
AES_SHA1_PRF
};
struct _krb5_encryption_type _krb5_enctype_aes256_cts_hmac_sha1 = {
ETYPE_AES256_CTS_HMAC_SHA1_96,
"aes256-cts-hmac-sha1-96",
"aes256-cts",
16,
1,
16,
&keytype_aes256_sha1,
&_krb5_checksum_sha1,
&_krb5_checksum_hmac_sha1_aes256,
F_DERIVED | F_RFC3961_ENC | F_RFC3961_KDF,
_krb5_evp_encrypt_cts,
_krb5_evp_encrypt_iov_cts,
16,
AES_SHA1_PRF
};
|
