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Diffstat (limited to 'lib/pam_vprompt.c')
| -rw-r--r-- | lib/pam_vprompt.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/lib/pam_vprompt.c b/lib/pam_vprompt.c new file mode 100644 index 0000000..e1215c3 --- /dev/null +++ b/lib/pam_vprompt.c @@ -0,0 +1,129 @@ +/*- + * Copyright (c) 2002-2003 Networks Associates Technology, Inc. + * Copyright (c) 2004-2007 Dag-Erling Smørgrav + * All rights reserved. + * + * This software was developed for the FreeBSD Project by ThinkSec AS and + * Network Associates Laboratories, the Security Research Division of + * Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 + * ("CBOSS"), as part of the DARPA CHATS research program. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $Id: pam_vprompt.c 408 2007-12-21 11:36:24Z des $ + */ + +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> + +#include <security/pam_appl.h> + +#include "openpam_impl.h" + +/* + * OpenPAM extension + * + * Call the conversation function + */ + +int +pam_vprompt(const pam_handle_t *pamh, + int style, + char **resp, + const char *fmt, + va_list ap) +{ + char msgbuf[PAM_MAX_MSG_SIZE]; + struct pam_message msg; + const struct pam_message *msgp; + struct pam_response *rsp; + const struct pam_conv *conv; + const void *convp; + int r; + + ENTER(); + r = pam_get_item(pamh, PAM_CONV, &convp); + if (r != PAM_SUCCESS) + RETURNC(r); + conv = convp; + if (conv == NULL || conv->conv == NULL) { + openpam_log(PAM_LOG_ERROR, "no conversation function"); + RETURNC(PAM_SYSTEM_ERR); + } + vsnprintf(msgbuf, PAM_MAX_MSG_SIZE, fmt, ap); + msg.msg_style = style; + msg.msg = msgbuf; + msgp = &msg; + rsp = NULL; + r = (conv->conv)(1, &msgp, &rsp, conv->appdata_ptr); + *resp = rsp == NULL ? NULL : rsp->resp; + FREE(rsp); + RETURNC(r); +} + +/* + * Error codes: + * + * !PAM_SYMBOL_ERR + * PAM_SYSTEM_ERR + * PAM_BUF_ERR + * PAM_CONV_ERR + */ + +/** + * The =pam_vprompt function constructs a string from the =fmt and =ap + * arguments using =vsnprintf, and passes it to the given PAM context's + * conversation function. + * + * The =style argument specifies the type of interaction requested, and + * must be one of the following: + * + * =PAM_PROMPT_ECHO_OFF: + * Display the message and obtain the user's response without + * displaying it. + * =PAM_PROMPT_ECHO_ON: + * Display the message and obtain the user's response. + * =PAM_ERROR_MSG: + * Display the message as an error message, and do not wait + * for a response. + * =PAM_TEXT_INFO: + * Display the message as an informational message, and do + * not wait for a response. + * + * A pointer to the response, or =NULL if the conversation function did + * not return one, is stored in the location pointed to by the =resp + * argument. + * + * The message and response should not exceed =PAM_MAX_MSG_SIZE or + * =PAM_MAX_RESP_SIZE, respectively. + * If they do, they may be truncated. + * + * >pam_error + * >pam_info + * >pam_prompt + * >pam_verror + * >pam_vinfo + */ |
