1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* 7 * lib/krb5/krb/copy_princ.c 8 * 9 * Copyright 1990 by the Massachusetts Institute of Technology. 10 * All Rights Reserved. 11 * 12 * Export of this software from the United States of America may 13 * require a specific license from the United States Government. 14 * It is the responsibility of any person or organization contemplating 15 * export to obtain such a license before exporting. 16 * 17 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 18 * distribute this software and its documentation for any purpose and 19 * without fee is hereby granted, provided that the above copyright 20 * notice appear in all copies and that both that copyright notice and 21 * this permission notice appear in supporting documentation, and that 22 * the name of M.I.T. not be used in advertising or publicity pertaining 23 * to distribution of the software without specific, written prior 24 * permission. Furthermore if you modify this software you must label 25 * your software as modified software and not distribute it in such a 26 * fashion that it might be confused with the original M.I.T. software. 27 * M.I.T. makes no representations about the suitability of 28 * this software for any purpose. It is provided "as is" without express 29 * or implied warranty. 30 * 31 * 32 * krb5_copy_principal() 33 */ 34 35 #include "k5-int.h" 36 37 /* 38 * Copy a principal structure, with fresh allocation. 39 */ 40 /*ARGSUSED*/ 41 krb5_error_code KRB5_CALLCONV 42 krb5_copy_principal(krb5_context context, krb5_const_principal inprinc, krb5_principal *outprinc) 43 { 44 register krb5_principal tempprinc; 45 register int i, nelems; 46 47 tempprinc = (krb5_principal)MALLOC(sizeof(krb5_principal_data)); 48 49 if (tempprinc == 0) 50 return ENOMEM; 51 52 *tempprinc = *inprinc; 53 54 nelems = (int) krb5_princ_size(context, inprinc); 55 tempprinc->data = MALLOC(nelems * sizeof(krb5_data)); 56 57 if (tempprinc->data == 0) { 58 FREE((char *)tempprinc, sizeof(krb5_principal_data)); 59 return ENOMEM; 60 } 61 62 for (i = 0; i < nelems; i++) { 63 unsigned int len = krb5_princ_component(context, inprinc, i)->length; 64 krb5_princ_component(context, tempprinc, i)->length = len; 65 66 /* 67 * Allocate one extra byte for trailing zero byte so string ops 68 * can be used on the components. 69 */ 70 if (len && 71 ((krb5_princ_component(context, tempprinc, i)->data = 72 MALLOC(len + 1)) == 0)) { 73 while (--i >= 0) 74 FREE(krb5_princ_component(context, tempprinc, i)->data, 75 krb5_princ_component(context, inprinc, i)->length + 1); 76 FREE (tempprinc->data, nelems * sizeof(krb5_data)); 77 FREE (tempprinc,sizeof(krb5_principal_data)); 78 return ENOMEM; 79 } 80 if (len) 81 (void) memcpy(krb5_princ_component(context, tempprinc, i)->data, 82 krb5_princ_component(context, inprinc, i)->data, len); 83 else 84 krb5_princ_component(context, tempprinc, i)->data = 0; 85 } 86 87 tempprinc->realm.length = inprinc->realm.length; 88 89 /* 90 * Allocate one extra byte for the realm name string terminator. The 91 * realm and principle component strings alway leave a null byte after 92 * 'length' bytes that needs to be malloc/freed. 93 */ 94 tempprinc->realm.data = MALLOC(tempprinc->realm.length + 1); 95 if (!tempprinc->realm.data) { 96 for (i = 0; i < nelems; i++) 97 FREE(krb5_princ_component(context, tempprinc, i)->data, 98 krb5_princ_component(context, inprinc, i)->length + 1); 99 FREE(tempprinc->data, nelems * sizeof(krb5_data)); 100 FREE(tempprinc, sizeof(krb5_principal_data)); 101 return ENOMEM; 102 } 103 memcpy(tempprinc->realm.data, inprinc->realm.data, 104 inprinc->realm.length); 105 tempprinc->realm.data[tempprinc->realm.length] = 0; 106 107 *outprinc = tempprinc; 108 return 0; 109 } 110