xref: /titanic_44/usr/src/lib/gss_mechs/mech_krb5/krb5/krb/bld_princ.c (revision 159d09a20817016f09b3ea28d1bdada4a336bb91)
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