1 /* 2 * Copyright (c) 1997 - 1999, 2002 - 2003 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "krb5_locl.h" 35 36 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 37 krb5_aname_to_localname (krb5_context context, 38 krb5_const_principal aname, 39 size_t lnsize, 40 char *lname) 41 { 42 krb5_error_code ret; 43 krb5_realm *lrealms, *r; 44 int valid; 45 size_t len; 46 const char *res; 47 48 ret = krb5_get_default_realms (context, &lrealms); 49 if (ret) 50 return ret; 51 52 valid = 0; 53 for (r = lrealms; *r != NULL; ++r) { 54 if (strcmp (*r, aname->realm) == 0) { 55 valid = 1; 56 break; 57 } 58 } 59 krb5_free_host_realm (context, lrealms); 60 if (valid == 0) 61 return KRB5_NO_LOCALNAME; 62 63 if (aname->name.name_string.len == 1) 64 res = aname->name.name_string.val[0]; 65 else if (aname->name.name_string.len == 2 66 && strcmp (aname->name.name_string.val[1], "root") == 0) { 67 krb5_principal rootprinc; 68 krb5_boolean userok; 69 70 res = "root"; 71 72 ret = krb5_copy_principal(context, aname, &rootprinc); 73 if (ret) 74 return ret; 75 76 userok = krb5_kuserok(context, rootprinc, res); 77 krb5_free_principal(context, rootprinc); 78 if (!userok) 79 return KRB5_NO_LOCALNAME; 80 81 } else 82 return KRB5_NO_LOCALNAME; 83 84 len = strlen (res); 85 if (len >= lnsize) 86 return ERANGE; 87 strlcpy (lname, res, lnsize); 88 89 return 0; 90 } 91