1 /*
2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "krb5_locl.h"
35
36 RCSID("$Id: keyblock.c 15167 2005-05-18 04:21:57Z lha $");
37
38 void KRB5_LIB_FUNCTION
krb5_keyblock_zero(krb5_keyblock * keyblock)39 krb5_keyblock_zero(krb5_keyblock *keyblock)
40 {
41 keyblock->keytype = 0;
42 krb5_data_zero(&keyblock->keyvalue);
43 }
44
45 void KRB5_LIB_FUNCTION
krb5_free_keyblock_contents(krb5_context context,krb5_keyblock * keyblock)46 krb5_free_keyblock_contents(krb5_context context,
47 krb5_keyblock *keyblock)
48 {
49 if(keyblock) {
50 if (keyblock->keyvalue.data != NULL)
51 memset(keyblock->keyvalue.data, 0, keyblock->keyvalue.length);
52 krb5_data_free (&keyblock->keyvalue);
53 keyblock->keytype = ENCTYPE_NULL;
54 }
55 }
56
57 void KRB5_LIB_FUNCTION
krb5_free_keyblock(krb5_context context,krb5_keyblock * keyblock)58 krb5_free_keyblock(krb5_context context,
59 krb5_keyblock *keyblock)
60 {
61 if(keyblock){
62 krb5_free_keyblock_contents(context, keyblock);
63 free(keyblock);
64 }
65 }
66
67 krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_keyblock_contents(krb5_context context,const krb5_keyblock * inblock,krb5_keyblock * to)68 krb5_copy_keyblock_contents (krb5_context context,
69 const krb5_keyblock *inblock,
70 krb5_keyblock *to)
71 {
72 return copy_EncryptionKey(inblock, to);
73 }
74
75 krb5_error_code KRB5_LIB_FUNCTION
krb5_copy_keyblock(krb5_context context,const krb5_keyblock * inblock,krb5_keyblock ** to)76 krb5_copy_keyblock (krb5_context context,
77 const krb5_keyblock *inblock,
78 krb5_keyblock **to)
79 {
80 krb5_keyblock *k;
81
82 k = malloc (sizeof(*k));
83 if (k == NULL) {
84 krb5_set_error_string(context, "malloc: out of memory");
85 return ENOMEM;
86 }
87 *to = k;
88 return krb5_copy_keyblock_contents (context, inblock, k);
89 }
90
91 krb5_enctype
krb5_keyblock_get_enctype(const krb5_keyblock * block)92 krb5_keyblock_get_enctype(const krb5_keyblock *block)
93 {
94 return block->keytype;
95 }
96
97 /*
98 * Fill in `key' with key data of type `enctype' from `data' of length
99 * `size'. Key should be freed using krb5_free_keyblock_contents.
100 */
101
102 krb5_error_code KRB5_LIB_FUNCTION
krb5_keyblock_init(krb5_context context,krb5_enctype type,const void * data,size_t size,krb5_keyblock * key)103 krb5_keyblock_init(krb5_context context,
104 krb5_enctype type,
105 const void *data,
106 size_t size,
107 krb5_keyblock *key)
108 {
109 krb5_error_code ret;
110 size_t len;
111
112 memset(key, 0, sizeof(*key));
113
114 ret = krb5_enctype_keysize(context, type, &len);
115 if (ret)
116 return ret;
117
118 if (len != size) {
119 krb5_set_error_string(context, "Encryption key %d is %lu bytes "
120 "long, %lu was passed in",
121 type, (unsigned long)len, (unsigned long)size);
122 return KRB5_PROG_ETYPE_NOSUPP;
123 }
124 ret = krb5_data_copy(&key->keyvalue, data, len);
125 if(ret) {
126 krb5_set_error_string(context, "malloc failed: %lu",
127 (unsigned long)len);
128 return ret;
129 }
130 key->keytype = type;
131
132 return 0;
133 }
134