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v 1.8.8

    1: /*
    2:  * Copyright (c) 1999-2005, 2007-2012 Todd C. Miller <Todd.Miller@courtesan.com>
    3:  *
    4:  * Permission to use, copy, modify, and distribute this software for any
    5:  * purpose with or without fee is hereby granted, provided that the above
    6:  * copyright notice and this permission notice appear in all copies.
    7:  *
    8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   15:  *
   16:  * Sponsored in part by the Defense Advanced Research Projects
   17:  * Agency (DARPA) and Air Force Research Laboratory, Air Force
   18:  * Materiel Command, USAF, under agreement number F39502-99-1-0512.
   19:  */
   20: 
   21: #include <config.h>
   22: 
   23: #include <sys/types.h>
   24: #include <stdio.h>
   25: #ifdef STDC_HEADERS
   26: # include <stdlib.h>
   27: # include <stddef.h>
   28: #else
   29: # ifdef HAVE_STDLIB_H
   30: #  include <stdlib.h>
   31: # endif
   32: #endif /* STDC_HEADERS */
   33: #ifdef HAVE_STRING_H
   34: # if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
   35: #  include <memory.h>
   36: # endif
   37: # include <string.h>
   38: #endif /* HAVE_STRING_H */
   39: #ifdef HAVE_STRINGS_H
   40: # include <strings.h>
   41: #endif /* HAVE_STRINGS_H */
   42: #ifdef HAVE_UNISTD_H
   43: # include <unistd.h>
   44: #endif /* HAVE_UNISTD_H */
   45: #include <errno.h>
   46: 
   47: #include "sudo.h"
   48: #include "sudo_plugin.h"
   49: #include "sudo_plugin_int.h"
   50: 
   51: extern int tgetpass_flags; /* XXX */
   52: 
   53: /*
   54:  * Sudo conversation function.
   55:  */
   56: int
   57: sudo_conversation(int num_msgs, const struct sudo_conv_message msgs[],
   58:     struct sudo_conv_reply replies[])
   59: {
   60:     struct sudo_conv_reply *repl;
   61:     const struct sudo_conv_message *msg;
   62:     char *pass;
   63:     int n, flags = tgetpass_flags;
   64: 
   65:     for (n = 0; n < num_msgs; n++) {
   66: 	msg = &msgs[n];
   67: 	repl = &replies[n];
   68: 	switch (msg->msg_type & 0xff) {
   69: 	    case SUDO_CONV_PROMPT_ECHO_ON:
   70: 	    case SUDO_CONV_PROMPT_MASK:
   71: 		if (msg->msg_type == SUDO_CONV_PROMPT_ECHO_ON)
   72: 		    SET(flags, TGP_ECHO);
   73: 		else
   74: 		    SET(flags, TGP_MASK);
   75: 		/* FALLTHROUGH */
   76: 	    case SUDO_CONV_PROMPT_ECHO_OFF:
   77: 		if (ISSET(msg->msg_type, SUDO_CONV_PROMPT_ECHO_OK))
   78: 		    SET(flags, TGP_NOECHO_TRY);
   79: 		/* Read the password unless interrupted. */
   80: 		pass = tgetpass(msg->msg, msg->timeout, flags);
   81: 		if (pass == NULL)
   82: 		    goto err;
   83: 		repl->reply = estrdup(pass);
   84: 		memset_s(pass, SUDO_CONV_REPL_MAX, 0, strlen(pass));
   85: 		break;
   86: 	    case SUDO_CONV_INFO_MSG:
   87: 		if (msg->msg)
   88: 		    (void) fputs(msg->msg, stdout);
   89: 		break;
   90: 	    case SUDO_CONV_ERROR_MSG:
   91: 		if (msg->msg)
   92: 		    (void) fputs(msg->msg, stderr);
   93: 		break;
   94: 	    case SUDO_CONV_DEBUG_MSG:
   95: 		if (msg->msg)
   96: 		    sudo_debug_write(msg->msg, strlen(msg->msg), 0);
   97: 		break;
   98: 	    default:
   99: 		goto err;
  100: 	}
  101:     }
  102: 
  103:     return 0;
  104: 
  105: err:
  106:     /* Zero and free allocated memory and return an error. */
  107:     do {
  108: 	repl = &replies[n];
  109: 	if (repl->reply != NULL) {
  110: 	    memset_s(repl->reply, SUDO_CONV_REPL_MAX, 0, strlen(repl->reply));
  111: 	    free(repl->reply);
  112: 	    repl->reply = NULL;
  113: 	}
  114:     } while (n--);
  115: 
  116:     return -1;
  117: }