1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 30 #include <errno.h> 31 #include <pwd.h> 32 33 #include "krb5/gsskrb5_locl.h" 34 35 OM_uint32 36 _gsskrb5_pname_to_uid(OM_uint32 *minor_status, const gss_name_t pname, 37 const gss_OID mech, uid_t *uidp) 38 { 39 krb5_context context; 40 krb5_const_principal name = (krb5_const_principal) pname; 41 krb5_error_code kret; 42 char lname[MAXLOGNAME + 1], buf[1024], *bufp; 43 struct passwd pwd, *pw; 44 size_t buflen; 45 int error; 46 OM_uint32 ret; 47 static size_t buflen_hint = 1024; 48 49 GSSAPI_KRB5_INIT (&context); 50 51 kret = krb5_aname_to_localname(context, name, sizeof(lname), lname); 52 if (kret) { 53 *minor_status = kret; 54 return (GSS_S_FAILURE); 55 } 56 57 *minor_status = 0; 58 buflen = buflen_hint; 59 for (;;) { 60 pw = NULL; 61 bufp = buf; 62 if (buflen > sizeof(buf)) 63 bufp = malloc(buflen); 64 if (bufp == NULL) 65 break; 66 error = getpwnam_r(lname, &pwd, bufp, buflen, &pw); 67 if (error != ERANGE) 68 break; 69 if (buflen > sizeof(buf)) 70 free(bufp); 71 buflen += 1024; 72 if (buflen > buflen_hint) 73 buflen_hint = buflen; 74 } 75 if (pw) { 76 *uidp = pw->pw_uid; 77 ret = GSS_S_COMPLETE; 78 } else { 79 ret = GSS_S_FAILURE; 80 } 81 if (bufp != NULL && buflen > sizeof(buf)) 82 free(bufp); 83 return (ret); 84 } 85