1/*- 2 * Copyright (c) 2002-2003 Networks Associates Technology, Inc. 3 * Copyright (c) 2004-2007 Dag-Erling Smørgrav 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by ThinkSec AS and 7 * Network Associates Laboratories, the Security Research Division of 8 * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 9 * ("CBOSS"), as part of the DARPA CHATS research program. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The name of the author may not be used to endorse or promote 20 * products derived from this software without specific prior written 21 * permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * $Id: pam_get_user.c 408 2007-12-21 11:36:24Z des $ 36 */ 37 38#include <sys/param.h> 39 40#include <stdlib.h> 41 42#include <security/pam_appl.h> 43#include <security/openpam.h> 44 45#include "openpam_impl.h" 46 47static const char user_prompt[] = "Login:"; 48 49/* 50 * XSSO 4.2.1 51 * XSSO 6 page 52 52 * 53 * Retrieve user name 54 */ 55 56int 57pam_get_user(pam_handle_t *pamh, 58 const char **user, 59 const char *prompt) 60{ 61 const void *promptp; 62 char *resp; 63 int r; 64 65 ENTER(); 66 if (pamh == NULL || user == NULL) 67 RETURNC(PAM_SYSTEM_ERR); 68 r = pam_get_item(pamh, PAM_USER, (const void **)user); 69 if (r == PAM_SUCCESS && *user != NULL) 70 RETURNC(PAM_SUCCESS); 71 if (prompt == NULL) { 72 r = pam_get_item(pamh, PAM_USER_PROMPT, &promptp); 73 if (r != PAM_SUCCESS || promptp == NULL) 74 prompt = user_prompt; 75 else 76 prompt = promptp; 77 } 78 r = pam_prompt(pamh, PAM_PROMPT_ECHO_ON, &resp, "%s", prompt); 79 if (r != PAM_SUCCESS) 80 RETURNC(r); 81 r = pam_set_item(pamh, PAM_USER, resp); 82 FREE(resp); 83 if (r != PAM_SUCCESS) 84 RETURNC(r); 85 r = pam_get_item(pamh, PAM_USER, (const void **)user); 86 RETURNC(r); 87} 88 89/* 90 * Error codes: 91 * 92 * =pam_get_item 93 * =pam_prompt 94 * =pam_set_item 95 * !PAM_SYMBOL_ERR 96 */ 97 98/** 99 * The =pam_get_user function returns the name of the target user, as 100 * specified to =pam_start. 101 * If no user was specified, nor set using =pam_set_item, =pam_get_user 102 * will prompt for a user name. 103 * Either way, a pointer to the user name is stored in the location 104 * pointed to by the =user argument. 105 * 106 * The =prompt argument specifies a prompt to use if no user name is 107 * cached. 108 * If it is =NULL, the =PAM_USER_PROMPT will be used. 109 * If that item is also =NULL, a hardcoded default prompt will be used. 110 * 111 * >pam_get_item 112 * >pam_get_authtok 113 */ 114