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*/
35 krb5_error_code KRB5_CALLCONV_C
krb5_build_principal_ext(krb5_context context,krb5_principal * princ,unsigned int rlen,const char * realm,...)36 krb5_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
96 free_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