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/*
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pam_prompt.c - replacement function for pam_prompt()
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Copyright (C) 2010, 2012 Arthur de Jong
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include "compat/attrs.h"
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#include "compat/pam_compat.h"
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int pam_prompt(pam_handle_t *pamh, int style, char **response,
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const char *format, ...)
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{
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int rc;
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struct pam_conv *aconv;
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char buffer[200];
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va_list ap;
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struct pam_message msg, *pmsg;
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struct pam_response *resp;
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/* the the conversion function */
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rc = pam_get_item(pamh, PAM_CONV, (PAM_ITEM_CONST void **)&aconv);
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if (rc != PAM_SUCCESS)
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return rc;
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/* make the message string */
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va_start(ap, format);
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vsnprintf(buffer, sizeof(buffer), format, ap);
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buffer[sizeof(buffer) - 1] = '\0';
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va_end(ap);
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/* build the message */
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msg.msg_style = style;
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msg.msg = buffer;
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pmsg = &msg;
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resp = NULL;
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rc = aconv->conv(1, (const struct pam_message **)&pmsg, &resp, aconv->appdata_ptr);
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if (rc != PAM_SUCCESS)
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return rc;
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/* assign response if it is set */
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if (response != NULL)
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{
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if (resp == NULL)
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return PAM_CONV_ERR;
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if (resp[0].resp == NULL)
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{
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free(resp);
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return PAM_CONV_ERR;
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}
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*response = resp[0].resp;
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}
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else
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free(resp[0].resp);
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free(resp);
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return PAM_SUCCESS;
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}
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