1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ 5 * Authors: Doug Rabson <dfr@rabson.org> 6 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 /* $FreeBSD$ */ 30 31 #include <errno.h> 32 #include <pwd.h> 33 34 #include "krb5/gsskrb5_locl.h" 35 36 OM_uint32 37 _gsskrb5_pname_to_uid(OM_uint32 *minor_status, const gss_name_t pname, 38 const gss_OID mech, uid_t *uidp) 39 { 40 krb5_context context; 41 krb5_const_principal name = (krb5_const_principal) pname; 42 krb5_error_code kret; 43 char lname[MAXLOGNAME + 1], buf[1024], *bufp; 44 struct passwd pwd, *pw; 45 size_t buflen; 46 int error; 47 OM_uint32 ret; 48 static size_t buflen_hint = 1024; 49 50 GSSAPI_KRB5_INIT (&context); 51 52 kret = krb5_aname_to_localname(context, name, sizeof(lname), lname); 53 if (kret) { 54 *minor_status = kret; 55 return (GSS_S_FAILURE); 56 } 57 58 *minor_status = 0; 59 buflen = buflen_hint; 60 for (;;) { 61 pw = NULL; 62 bufp = buf; 63 if (buflen > sizeof(buf)) 64 bufp = malloc(buflen); 65 if (bufp == NULL) 66 break; 67 error = getpwnam_r(lname, &pwd, bufp, buflen, &pw); 68 if (error != ERANGE) 69 break; 70 if (buflen > sizeof(buf)) 71 free(bufp); 72 buflen += 1024; 73 if (buflen > buflen_hint) 74 buflen_hint = buflen; 75 } 76 if (pw) { 77 *uidp = pw->pw_uid; 78 ret = GSS_S_COMPLETE; 79 } else { 80 ret = GSS_S_FAILURE; 81 } 82 if (bufp != NULL && buflen > sizeof(buf)) 83 free(bufp); 84 return (ret); 85 } 86