1 /*
2  * lib/krb5/krb/pr_to_salt.c
3  *
4  * Copyright 1990 by the Massachusetts Institute of Technology.
5  * All Rights Reserved.
6  *
7  * Export of this software from the United States of America may
8  *   require a specific license from the United States Government.
9  *   It is the responsibility of any person or organization contemplating
10  *   export to obtain such a license before exporting.
11  *
12  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
13  * distribute this software and its documentation for any purpose and
14  * without fee is hereby granted, provided that the above copyright
15  * notice appear in all copies and that both that copyright notice and
16  * this permission notice appear in supporting documentation, and that
17  * the name of M.I.T. not be used in advertising or publicity pertaining
18  * to distribution of the software without specific, written prior
19  * permission.  Furthermore if you modify this software you must label
20  * your software as modified software and not distribute it in such a
21  * fashion that it might be confused with the original M.I.T. software.
22  * M.I.T. makes no representations about the suitability of
23  * this software for any purpose.  It is provided "as is" without express
24  * or implied warranty.
25  *
26  *
27  * krb5_principal2salt()
28  */
29 
30 #include "k5-int.h"
31 
32 static krb5_error_code krb5_principal2salt_internal
33     (krb5_context, krb5_const_principal, krb5_data *ret, int);
34 
35 /*
36  * Convert a krb5_principal into the default salt for that principal.
37  */
38 /*ARGSUSED*/
39 static krb5_error_code
krb5_principal2salt_internal(krb5_context context,register krb5_const_principal pr,krb5_data * ret,int use_realm)40 krb5_principal2salt_internal(krb5_context context, register krb5_const_principal pr, krb5_data *ret, int use_realm)
41 {
42     unsigned int size = 0, offset=0;
43     krb5_int32 nelem;
44     register int i;
45 
46     if (pr == 0) {
47 	ret->length = 0;
48 	ret->data = 0;
49 	return 0;
50     }
51 
52     nelem = krb5_princ_size(context, pr);
53 
54     if (use_realm)
55 	    size += krb5_princ_realm(context, pr)->length;
56 
57     for (i = 0; i < (int) nelem; i++)
58 	size += krb5_princ_component(context, pr, i)->length;
59 
60     ret->length = size;
61     if (!(ret->data = malloc (size)))
62 	return ENOMEM;
63 
64     if (use_realm) {
65 	    offset = krb5_princ_realm(context, pr)->length;
66 	    memcpy(ret->data, krb5_princ_realm(context, pr)->data, offset);
67     }
68 
69     for (i = 0; i < (int) nelem; i++) {
70 	memcpy(&ret->data[offset], krb5_princ_component(context, pr, i)->data,
71 	       krb5_princ_component(context, pr, i)->length);
72 	offset += krb5_princ_component(context, pr, i)->length;
73     }
74     return 0;
75 }
76 
77 krb5_error_code
krb5_principal2salt(krb5_context context,register krb5_const_principal pr,krb5_data * ret)78 krb5_principal2salt(krb5_context context, register krb5_const_principal pr, krb5_data *ret)
79 {
80 	return krb5_principal2salt_internal(context, pr, ret, 1);
81 }
82 
83 krb5_error_code
krb5_principal2salt_norealm(krb5_context context,register krb5_const_principal pr,krb5_data * ret)84 krb5_principal2salt_norealm(krb5_context context, register krb5_const_principal pr, krb5_data *ret)
85 {
86 	return krb5_principal2salt_internal(context, pr, ret, 0);
87 }
88