2 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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.
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.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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34 #include "krb5_locl.h"
39 * @param keyblock keyblock to zero out
41 * @ingroup krb5_crypto
44 KRB5_LIB_FUNCTION
void KRB5_LIB_CALL
45 krb5_keyblock_zero(krb5_keyblock
*keyblock
)
47 keyblock
->keytype
= 0;
48 krb5_data_zero(&keyblock
->keyvalue
);
52 * Free a keyblock's content, also zero out the content of the keyblock.
54 * @param context a Kerberos 5 context
55 * @param keyblock keyblock content to free, NULL is valid argument
57 * @ingroup krb5_crypto
60 KRB5_LIB_FUNCTION
void KRB5_LIB_CALL
61 krb5_free_keyblock_contents(krb5_context context
,
62 krb5_keyblock
*keyblock
)
65 if (keyblock
->keyvalue
.data
!= NULL
)
66 memset(keyblock
->keyvalue
.data
, 0, keyblock
->keyvalue
.length
);
67 krb5_data_free (&keyblock
->keyvalue
);
68 keyblock
->keytype
= KRB5_ENCTYPE_NULL
;
73 * Free a keyblock, also zero out the content of the keyblock, uses
74 * krb5_free_keyblock_contents() to free the content.
76 * @param context a Kerberos 5 context
77 * @param keyblock keyblock to free, NULL is valid argument
79 * @ingroup krb5_crypto
82 KRB5_LIB_FUNCTION
void KRB5_LIB_CALL
83 krb5_free_keyblock(krb5_context context
,
84 krb5_keyblock
*keyblock
)
87 krb5_free_keyblock_contents(context
, keyblock
);
93 * Copy a keyblock, free the output keyblock with
94 * krb5_free_keyblock_contents().
96 * @param context a Kerberos 5 context
97 * @param inblock the key to copy
98 * @param to the output key.
100 * @return 0 on success or a Kerberos 5 error code
102 * @ingroup krb5_crypto
105 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
106 krb5_copy_keyblock_contents (krb5_context context
,
107 const krb5_keyblock
*inblock
,
110 return copy_EncryptionKey(inblock
, to
);
114 * Copy a keyblock, free the output keyblock with
115 * krb5_free_keyblock().
117 * @param context a Kerberos 5 context
118 * @param inblock the key to copy
119 * @param to the output key.
121 * @return 0 on success or a Kerberos 5 error code
123 * @ingroup krb5_crypto
127 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
128 krb5_copy_keyblock (krb5_context context
,
129 const krb5_keyblock
*inblock
,
137 k
= calloc (1, sizeof(*k
));
139 return krb5_enomem(context
);
141 ret
= krb5_copy_keyblock_contents (context
, inblock
, k
);
151 * Get encryption type of a keyblock.
153 * @ingroup krb5_crypto
156 KRB5_LIB_FUNCTION krb5_enctype KRB5_LIB_CALL
157 krb5_keyblock_get_enctype(const krb5_keyblock
*block
)
159 return block
->keytype
;
163 * Fill in `key' with key data of type `enctype' from `data' of length
164 * `size'. Key should be freed using krb5_free_keyblock_contents().
166 * @return 0 on success or a Kerberos 5 error code
168 * @ingroup krb5_crypto
171 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
172 krb5_keyblock_init(krb5_context context
,
181 memset(key
, 0, sizeof(*key
));
183 ret
= krb5_enctype_keysize(context
, type
, &len
);
188 krb5_set_error_message(context
, KRB5_PROG_ETYPE_NOSUPP
,
189 "Encryption key %d is %lu bytes "
190 "long, %lu was passed in",
191 type
, (unsigned long)len
, (unsigned long)size
);
192 return KRB5_PROG_ETYPE_NOSUPP
;
194 ret
= krb5_data_copy(&key
->keyvalue
, data
, len
);
196 krb5_set_error_message(context
, ret
, N_("malloc: out of memory", ""));