1 /*
2 * COPYRIGHT (c) 2006
3 * The Regents of the University of Michigan
4 * ALL RIGHTS RESERVED
5 *
6 * Permission is granted to use, copy, create derivative works
7 * and redistribute this software and such derivative works
8 * for any purpose, so long as the name of The University of
9 * Michigan is not used in any advertising or publicity
10 * pertaining to the use of distribution of this software
11 * without specific, written prior authorization. If the
12 * above copyright notice or any other identification of the
13 * University of Michigan is included in any copy of any
14 * portion of this software, then the disclaimer below must
15 * also be included.
16 *
17 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION
18 * FROM THE UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY
19 * PURPOSE, AND WITHOUT WARRANTY BY THE UNIVERSITY OF
20 * MICHIGAN OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
21 * WITHOUT LIMITATION THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
23 * REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE
24 * FOR ANY DAMAGES, INCLUDING SPECIAL, INDIRECT, INCIDENTAL, OR
25 * CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM ARISING
26 * OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
27 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGES.
29 */
30
31
32 /*
33 * Create a key given random data. It is assumed that random_key has
34 * already been initialized and random_key->contents have been allocated
35 * with the correct length.
36 */
37 #include "k5-int.h"
38 #include "etypes.h"
39
40 krb5_error_code KRB5_CALLCONV
krb5_c_random_to_key(krb5_context context,krb5_enctype enctype,krb5_data * random_data,krb5_keyblock * random_key)41 krb5_c_random_to_key(krb5_context context, krb5_enctype enctype,
42 krb5_data *random_data, krb5_keyblock *random_key)
43 {
44 int i;
45 krb5_error_code ret;
46 const struct krb5_enc_provider *enc;
47
48 if (random_data == NULL || random_key == NULL)
49 return(EINVAL);
50
51 if (random_key->contents == NULL)
52 return(EINVAL);
53
54 for (i=0; i<krb5_enctypes_length; i++) {
55 if (krb5_enctypes_list[i].etype == enctype)
56 break;
57 }
58
59 if (i == krb5_enctypes_length)
60 return(KRB5_BAD_ENCTYPE);
61
62 enc = krb5_enctypes_list[i].enc;
63
64 if (random_key->length != enc->keylength)
65 return(KRB5_BAD_KEYSIZE);
66
67 /* Solaris Kerberos */
68 ret = ((*(enc->make_key))(context, random_data, random_key));
69
70 if (ret) {
71 memset(random_key->contents, 0, random_key->length);
72 }
73
74 return(ret);
75 }
76