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
|
/*
* lib/kdb/encrypt_key.c
*
* Copyright 1990,1991 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. Furthermore if you modify this software you must label
* your software as modified software and not distribute it in such a
* fashion that it might be confused with the original M.I.T. software.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* krb5_kdb_encrypt_key(), krb5_kdb_decrypt_key functions
*/
/*
* Copyright (C) 1998 by the FundsXpress, INC.
*
* All rights reserved.
*
* Export of this software from the United States of America may require
* a specific license from the United States Government. It is the
* responsibility of any person or organization contemplating export to
* obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of FundsXpress. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. FundsXpress makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "k5-int.h"
/*
* Encrypt a key for storage in the database. "eblock" is used
* to encrypt the key in "in" into "out"; the storage pointed to by "out"
* is allocated before use.
*/
krb5_error_code
krb5_dbekd_encrypt_key_data(context, mkey, dbkey, keysalt, keyver, key_data)
krb5_context context;
const krb5_keyblock * mkey;
const krb5_keyblock * dbkey;
const krb5_keysalt * keysalt;
int keyver;
krb5_key_data * key_data;
{
krb5_error_code retval;
krb5_octet * ptr;
size_t len;
int i;
krb5_data plain;
krb5_enc_data cipher;
for (i = 0; i < key_data->key_data_ver; i++)
if (key_data->key_data_contents[i])
krb5_xfree(key_data->key_data_contents[i]);
key_data->key_data_ver = 1;
key_data->key_data_kvno = keyver;
/*
* The First element of the type/length/contents
* fields is the key type/length/contents
*/
if ((retval = krb5_c_encrypt_length(context, mkey->enctype, dbkey->length,
&len)))
return(retval);
if ((ptr = (krb5_octet *) malloc(2 + len)) == NULL)
return(ENOMEM);
key_data->key_data_type[0] = dbkey->enctype;
key_data->key_data_length[0] = 2 + len;
key_data->key_data_contents[0] = ptr;
krb5_kdb_encode_int16(dbkey->length, ptr);
ptr += 2;
plain.length = dbkey->length;
plain.data = dbkey->contents;
cipher.ciphertext.length = len;
cipher.ciphertext.data = ptr;
if ((retval = krb5_c_encrypt(context, mkey, /* XXX */ 0, 0,
&plain, &cipher))) {
krb5_xfree(key_data->key_data_contents[0]);
return retval;
}
/* After key comes the salt in necessary */
if (keysalt) {
if (keysalt->type > 0) {
key_data->key_data_ver++;
key_data->key_data_type[1] = keysalt->type;
if ((key_data->key_data_length[1] = keysalt->data.length) != 0) {
key_data->key_data_contents[1] =
(krb5_octet *)malloc(keysalt->data.length);
if (key_data->key_data_contents[1] == NULL) {
krb5_xfree(key_data->key_data_contents[0]);
return ENOMEM;
}
memcpy(key_data->key_data_contents[1], keysalt->data.data,
(size_t) keysalt->data.length);
}
}
}
return retval;
}
|
