1 /*- 2 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/ 3 * Authors: Doug Rabson <dfr@rabson.org> 4 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org> 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 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 /* $FreeBSD$ */ 28 29 #include <errno.h> 30 #include <pwd.h> 31 32 #include "krb5/gsskrb5_locl.h" 33 34 OM_uint32 35 _gsskrb5_pname_to_uid(OM_uint32 *minor_status, const gss_name_t pname, 36 const gss_OID mech, uid_t *uidp) 37 { 38 krb5_context context; 39 krb5_const_principal name = (krb5_const_principal) pname; 40 krb5_error_code kret; 41 char lname[MAXLOGNAME + 1], buf[1024], *bufp; 42 struct passwd pwd, *pw; 43 size_t buflen; 44 int error; 45 OM_uint32 ret; 46 static size_t buflen_hint = 1024; 47 48 GSSAPI_KRB5_INIT (&context); 49 50 kret = krb5_aname_to_localname(context, name, sizeof(lname), lname); 51 if (kret) { 52 *minor_status = kret; 53 return (GSS_S_FAILURE); 54 } 55 56 *minor_status = 0; 57 buflen = buflen_hint; 58 for (;;) { 59 pw = NULL; 60 bufp = buf; 61 if (buflen > sizeof(buf)) 62 bufp = malloc(buflen); 63 if (bufp == NULL) 64 break; 65 error = getpwnam_r(lname, &pwd, bufp, buflen, &pw); 66 if (error != ERANGE) 67 break; 68 if (buflen > sizeof(buf)) 69 free(bufp); 70 buflen += 1024; 71 if (buflen > buflen_hint) 72 buflen_hint = buflen; 73 } 74 if (pw) { 75 *uidp = pw->pw_uid; 76 ret = GSS_S_COMPLETE; 77 } else { 78 ret = GSS_S_FAILURE; 79 } 80 if (bufp != NULL && buflen > sizeof(buf)) 81 free(bufp); 82 return (ret); 83 } 84