1 /*
2  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 
6 #pragma ident	"%Z%%M%	%I%	%E% SMI"
7 /*
8  * lib/krb5/krb/copy_auth.c
9  *
10  * Copyright 1990 by the Massachusetts Institute of Technology.
11  * All Rights Reserved.
12  *
13  * Export of this software from the United States of America may
14  *   require a specific license from the United States Government.
15  *   It is the responsibility of any person or organization contemplating
16  *   export to obtain such a license before exporting.
17  *
18  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
19  * distribute this software and its documentation for any purpose and
20  * without fee is hereby granted, provided that the above copyright
21  * notice appear in all copies and that both that copyright notice and
22  * this permission notice appear in supporting documentation, and that
23  * the name of M.I.T. not be used in advertising or publicity pertaining
24  * to distribution of the software without specific, written prior
25  * permission.  Furthermore if you modify this software you must label
26  * your software as modified software and not distribute it in such a
27  * fashion that it might be confused with the original M.I.T. software.
28  * M.I.T. makes no representations about the suitability of
29  * this software for any purpose.  It is provided "as is" without express
30  * or implied warranty.
31  *
32  *
33  * krb5_copy_authdata()
34  */
35 
36 #include <k5-int.h>
37 
38 /*ARGSUSED*/
39 static krb5_error_code
40 krb5_copy_authdatum(krb5_context context, const krb5_authdata *inad, krb5_authdata **outad)
41 {
42     krb5_authdata *tmpad;
43 
44     if (!(tmpad = (krb5_authdata *)MALLOC(sizeof(*tmpad))))
45 	return ENOMEM;
46 #ifdef HAVE_C_STRUCTURE_ASSIGNMENT
47     *tmpad = *inad;
48 #else
49     (void) memcpy(tmpad, inad, sizeof(krb5_authdata));
50 #endif
51     if (!(tmpad->contents = (krb5_octet *)MALLOC(inad->length))) {
52 	krb5_xfree_wrap(tmpad, inad->length);
53 	return ENOMEM;
54     }
55     (void) memcpy((char *)tmpad->contents, (char *)inad->contents,
56 	inad->length);
57     *outad = tmpad;
58     return 0;
59 }
60 
61 /*
62  * Copy an authdata array, with fresh allocation.
63  */
64 krb5_error_code KRB5_CALLCONV
65 krb5_copy_authdata(krb5_context context, krb5_authdata *const *inauthdat, krb5_authdata ***outauthdat)
66 {
67     krb5_error_code retval;
68     krb5_authdata ** tempauthdat;
69     register unsigned int nelems = 0;
70 
71     if (!inauthdat) {
72 	    *outauthdat = 0;
73 	    return 0;
74     }
75 
76     while (inauthdat[nelems]) nelems++;
77 
78     /* one more for a null terminated list */
79     if (!(tempauthdat = (krb5_authdata **) CALLOC(nelems+1,
80 						  sizeof(*tempauthdat))))
81 	return ENOMEM;
82 
83     for (nelems = 0; inauthdat[nelems]; nelems++) {
84 	retval = krb5_copy_authdatum(context, inauthdat[nelems],
85 				     &tempauthdat[nelems]);
86 	if (retval) {
87 	    krb5_free_authdata(context, tempauthdat);
88 	    return retval;
89 	}
90     }
91 
92     *outauthdat = tempauthdat;
93     return 0;
94 }
95