2 * Copyright (c) 1997 - 2007 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
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
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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
34 #include "krb5_locl.h"
37 * Reset the (potentially uninitalized) krb5_data structure.
39 * @param p krb5_data to reset.
44 KRB5_LIB_FUNCTION
void KRB5_LIB_CALL
45 krb5_data_zero(krb5_data
*p
)
52 * Free the content of krb5_data structure, its ok to free a zeroed
53 * structure (with memset() or krb5_data_zero()). When done, the
54 * structure will be zeroed. The same function is called
55 * krb5_free_data_contents() in MIT Kerberos.
57 * @param p krb5_data to free.
62 KRB5_LIB_FUNCTION
void KRB5_LIB_CALL
63 krb5_data_free(krb5_data
*p
)
71 * Free krb5_data (and its content).
73 * @param context Kerberos 5 context.
74 * @param p krb5_data to free.
79 KRB5_LIB_FUNCTION
void KRB5_LIB_CALL
80 krb5_free_data(krb5_context context
,
88 * Allocate data of and krb5_data.
90 * @param p krb5_data to allocate.
91 * @param len size to allocate.
93 * @return Returns 0 to indicate success. Otherwise an kerberos et
94 * error code is returned.
99 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
100 krb5_data_alloc(krb5_data
*p
, int len
)
102 p
->data
= malloc(len
);
103 if(len
&& p
->data
== NULL
)
110 * Grow (or shrink) the content of krb5_data to a new size.
112 * @param p krb5_data to free.
113 * @param len new size.
115 * @return Returns 0 to indicate success. Otherwise an kerberos et
116 * error code is returned.
121 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
122 krb5_data_realloc(krb5_data
*p
, int len
)
125 tmp
= realloc(p
->data
, len
);
134 * Copy the data of len into the krb5_data.
136 * @param p krb5_data to copy into.
137 * @param data data to copy..
138 * @param len new size.
140 * @return Returns 0 to indicate success. Otherwise an kerberos et
141 * error code is returned.
146 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
147 krb5_data_copy(krb5_data
*p
, const void *data
, size_t len
)
150 if(krb5_data_alloc(p
, len
))
152 memmove(p
->data
, data
, len
);
160 * Copy the data into a newly allocated krb5_data.
162 * @param context Kerberos 5 context.
163 * @param indata the krb5_data data to copy
164 * @param outdata new krb5_date to copy too. Free with krb5_free_data().
166 * @return Returns 0 to indicate success. Otherwise an kerberos et
167 * error code is returned.
172 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
173 krb5_copy_data(krb5_context context
,
174 const krb5_data
*indata
,
179 if(*outdata
== NULL
) {
180 krb5_set_error_message(context
, ENOMEM
, "malloc: out of memory");
183 ret
= der_copy_octet_string(indata
, *outdata
);
185 krb5_clear_error_message (context
);
195 * @param data1 krb5_data to compare
196 * @param data2 krb5_data to compare
198 * @return return the same way as memcmp(), useful when sorting.
203 KRB5_LIB_FUNCTION
int KRB5_LIB_CALL
204 krb5_data_cmp(const krb5_data
*data1
, const krb5_data
*data2
)
206 if (data1
->length
!= data2
->length
)
207 return data1
->length
- data2
->length
;
208 return memcmp(data1
->data
, data2
->data
, data1
->length
);
212 * Compare to data not exposing timing information from the checksum data
214 * @param data1 krb5_data to compare
215 * @param data2 krb5_data to compare
217 * @return returns zero for same data, otherwise non zero.
222 KRB5_LIB_FUNCTION
int KRB5_LIB_CALL
223 krb5_data_ct_cmp(const krb5_data
*data1
, const krb5_data
*data2
)
225 if (data1
->length
!= data2
->length
)
226 return data1
->length
- data2
->length
;
227 return ct_memcmp(data1
->data
, data2
->data
, data1
->length
);