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 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