1/*
2 * lib/krb5/krb/bld_pr_ext.c
3 *
4 * Copyright 1991 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 * Build a principal from a list of lengths and strings
28 */
29
30#include "k5-int.h"
31
32#include <stdarg.h>
33
34/*ARGSUSED*/
35krb5_error_code KRB5_CALLCONV_C
36krb5_build_principal_ext(krb5_context context,  krb5_principal * princ,
37			 unsigned int rlen, const char * realm, ...)
38{
39    va_list ap;
40    register int i, count = 0;
41    register unsigned int size;
42    register char *next;
43    char *tmpdata;
44    krb5_data *princ_data;
45    krb5_principal princ_ret;
46
47    va_start(ap, realm);
48    /* count up */
49    while (va_arg(ap, int) != 0) {
50	(void)va_arg(ap, char *);		/* pass one up */
51	count++;
52    }
53    va_end(ap);
54
55    /* we do a 2-pass to avoid the need to guess on allocation needs
56       cf. bld_princ.c */
57    /* get space for array */
58    princ_data = (krb5_data *) malloc(sizeof(krb5_data) * count);
59    if (!princ_data)
60	return ENOMEM;
61    princ_ret = (krb5_principal) malloc(sizeof(krb5_principal_data));
62    if (!princ_ret) {
63	krb5_xfree(princ_data);
64	return ENOMEM;
65    }
66    princ_ret->data = princ_data;
67    princ_ret->length = count;
68    tmpdata = malloc(rlen+1);
69    if (!tmpdata) {
70	krb5_xfree(princ_data);
71	krb5_xfree(princ_ret);
72	return ENOMEM;
73    }
74    krb5_princ_set_realm_length(context, princ_ret, rlen);
75    krb5_princ_set_realm_data(context, princ_ret, tmpdata);
76    memcpy(tmpdata, realm, rlen);
77    tmpdata[rlen] = 0;
78
79    /* process rest of components */
80    va_start(ap, realm);
81    for (i = 0; i < count; i++) {
82	size = va_arg(ap, unsigned int);
83	next = va_arg(ap, char *);
84	princ_data[i].length = size;
85	princ_data[i].data = malloc(size+1);
86	if (!princ_data[i].data)
87	    goto free_out;
88	memcpy(princ_data[i].data, next, size);
89	princ_data[i].data[size] = 0;
90    }
91    va_end(ap);
92    *princ = princ_ret;
93    krb5_princ_type(context, princ_ret) = KRB5_NT_UNKNOWN;
94    return 0;
95
96free_out:
97    /* Solaris Kerberos */
98    while (--i >= 0)
99	krb5_xfree(princ_data[i].data);
100    krb5_xfree(princ_data);
101    krb5_xfree(princ_ret);
102    va_end(ap);
103    return ENOMEM;
104}
105