1 /*
2 * lib/krb5/krb/bld_princ.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 strings
28 */
29
30 #include <stdarg.h>
31 #include "k5-int.h"
32
33 /*ARGSUSED*/
34 krb5_error_code
35 KRB5_CALLCONV
krb5_build_principal_va(krb5_context context,krb5_principal princ,unsigned int rlen,const char * realm,va_list ap)36 krb5_build_principal_va(krb5_context context, krb5_principal princ, unsigned int rlen, const char *realm, va_list ap)
37 {
38 register int i, count = 0;
39 register char *next;
40 char *tmpdata;
41 krb5_data *data;
42
43 /* guess at an initial sufficent count of 2 pieces */
44 count = 2;
45
46 /* get space for array and realm, and insert realm */
47 data = (krb5_data *) malloc(sizeof(krb5_data) * count);
48 if (data == 0)
49 return ENOMEM;
50 krb5_princ_set_realm_length(context, princ, rlen);
51 tmpdata = malloc(rlen);
52 if (!tmpdata) {
53 free (data);
54 return ENOMEM;
55 }
56 krb5_princ_set_realm_data(context, princ, tmpdata);
57 memcpy(tmpdata, realm, rlen);
58
59 /* process rest of components */
60
61 for (i = 0, next = va_arg(ap, char *);
62 next;
63 next = va_arg(ap, char *), i++) {
64 if (i == count) {
65 /* not big enough. realloc the array */
66 krb5_data *p_tmp;
67 p_tmp = (krb5_data *) realloc((char *)data,
68 sizeof(krb5_data)*(count*2));
69 if (!p_tmp) {
70 free_out:
71 while (--i >= 0)
72 krb5_xfree(data[i].data);
73 krb5_xfree(data);
74 krb5_xfree(tmpdata);
75 return (ENOMEM);
76 }
77 count *= 2;
78 data = p_tmp;
79 }
80
81 data[i].length = strlen(next);
82 data[i].data = strdup(next);
83 if (!data[i].data)
84 goto free_out;
85 }
86 princ->data = data;
87 princ->length = i;
88 princ->type = KRB5_NT_UNKNOWN;
89 princ->magic = KV5M_PRINCIPAL;
90 return 0;
91 }
92
93 krb5_error_code KRB5_CALLCONV_C
krb5_build_principal(krb5_context context,krb5_principal * princ,unsigned int rlen,const char * realm,...)94 krb5_build_principal(krb5_context context, krb5_principal * princ,
95 unsigned int rlen,
96 const char * realm, ...)
97 {
98 va_list ap;
99 krb5_error_code retval;
100 krb5_principal pr_ret = (krb5_principal)malloc(sizeof(krb5_principal_data));
101
102 if (!pr_ret)
103 return ENOMEM;
104
105 va_start(ap, realm);
106 retval = krb5_build_principal_va(context, pr_ret, rlen, realm, ap);
107 va_end(ap);
108 if (retval == 0)
109 *princ = pr_ret;
110 return retval;
111 }
112