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Annotation of embedaddon/sudo/src/conversation.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (c) 1999-2005, 2007-2010 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 <sys/param.h>
                     25: #include <stdio.h>
                     26: #ifdef STDC_HEADERS
                     27: # include <stdlib.h>
                     28: # include <stddef.h>
                     29: #else
                     30: # ifdef HAVE_STDLIB_H
                     31: #  include <stdlib.h>
                     32: # endif
                     33: #endif /* STDC_HEADERS */
                     34: #ifdef HAVE_STRING_H
                     35: # if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
                     36: #  include <memory.h>
                     37: # endif
                     38: # include <string.h>
                     39: #endif /* HAVE_STRING_H */
                     40: #ifdef HAVE_STRINGS_H
                     41: # include <strings.h>
                     42: #endif /* HAVE_STRINGS_H */
                     43: #ifdef HAVE_UNISTD_H
                     44: # include <unistd.h>
                     45: #endif /* HAVE_UNISTD_H */
                     46: #include <errno.h>
                     47: 
                     48: #include "sudo.h"
                     49: #include "sudo_plugin.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:                zero_bytes(pass, 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:            default:
                     95:                goto err;
                     96:        }
                     97:     }
                     98: 
                     99:     return 0;
                    100: 
                    101: err:
                    102:     /* Zero and free allocated memory and return an error. */
                    103:     do {
                    104:        repl = &replies[n];
                    105:        if (repl->reply != NULL) {
                    106:            zero_bytes(repl->reply, strlen(repl->reply));
                    107:            free(repl->reply);
                    108:            repl->reply = NULL;
                    109:        }
                    110:     } while (n--);
                    111: 
                    112:     return -1;
                    113: }
                    114: 
                    115: int
                    116: _sudo_printf(int msg_type, const char *fmt, ...)
                    117: {
                    118:     va_list ap;
                    119:     FILE *fp;
                    120:     int len;
                    121: 
                    122:     switch (msg_type) {
                    123:     case SUDO_CONV_INFO_MSG:
                    124:        fp = stdout;
                    125:        break;
                    126:     case SUDO_CONV_ERROR_MSG:
                    127:        fp = stderr;
                    128:        break;
                    129:     default:
                    130:        errno = EINVAL;
                    131:        return -1;
                    132:     }
                    133: 
                    134:     va_start(ap, fmt);
                    135:     len = vfprintf(fp, fmt, ap);
                    136:     va_end(ap);
                    137: 
                    138:     return len;
                    139: }