1 | /*- |
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2 | * Copyright (c) 2002 Networks Associates Technology, Inc. |
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3 | * All rights reserved. |
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4 | * |
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5 | * This software was developed for the FreeBSD Project by ThinkSec AS and |
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6 | * NAI Labs, the Security Research Division of Network Associates, Inc. |
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7 | * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the |
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8 | * DARPA CHATS research program. |
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9 | * |
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10 | * Redistribution and use in source and binary forms, with or without |
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11 | * modification, are permitted provided that the following conditions |
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12 | * are met: |
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13 | * 1. Redistributions of source code must retain the above copyright |
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14 | * notice, this list of conditions and the following disclaimer. |
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15 | * 2. Redistributions in binary form must reproduce the above copyright |
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16 | * notice, this list of conditions and the following disclaimer in the |
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17 | * documentation and/or other materials provided with the distribution. |
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18 | * 3. The name of the author may not be used to endorse or promote |
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19 | * products derived from this software without specific prior written |
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20 | * permission. |
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21 | * |
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22 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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32 | * SUCH DAMAGE. |
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33 | * |
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34 | * $P4: //depot/projects/openpam/lib/pam_vprompt.c#6 $ |
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35 | */ |
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36 | |
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37 | #include <stdarg.h> |
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38 | #include <stdio.h> |
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39 | #include <stdlib.h> |
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40 | |
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41 | #include <security/pam_appl.h> |
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42 | #include <security/openpam.h> |
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43 | |
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44 | /* |
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45 | * OpenPAM extension |
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46 | * |
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47 | * Call the conversation function |
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48 | */ |
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49 | |
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50 | int |
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51 | pam_vprompt(pam_handle_t *pamh, |
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52 | int style, |
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53 | char **resp, |
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54 | const char *fmt, |
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55 | va_list ap) |
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56 | { |
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57 | char msgbuf[PAM_MAX_MSG_SIZE]; |
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58 | struct pam_message msg; |
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59 | const struct pam_message *msgp; |
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60 | struct pam_response *rsp; |
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61 | struct pam_conv *conv; |
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62 | int r; |
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63 | |
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64 | r = pam_get_item(pamh, PAM_CONV, (const void **)&conv); |
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65 | if (r != PAM_SUCCESS) |
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66 | return (r); |
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67 | if (conv == NULL) { |
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68 | openpam_log(PAM_LOG_ERROR, "no conversation function"); |
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69 | return (PAM_SYSTEM_ERR); |
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70 | } |
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71 | vsnprintf(msgbuf, PAM_MAX_MSG_SIZE, fmt, ap); |
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72 | msg.msg_style = style; |
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73 | msg.msg = msgbuf; |
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74 | msgp = &msg; |
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75 | rsp = NULL; |
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76 | r = (conv->conv)(1, &msgp, &rsp, conv->appdata_ptr); |
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77 | *resp = rsp == NULL ? NULL : rsp->resp; |
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78 | free(rsp); |
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79 | return (r); |
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80 | } |
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81 | |
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82 | /* |
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83 | * Error codes: |
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84 | * |
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85 | * !PAM_SYMBOL_ERR |
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86 | * PAM_SYSTEM_ERR |
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87 | * PAM_BUF_ERR |
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88 | * PAM_CONV_ERR |
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89 | */ |
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90 | |
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91 | /** |
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92 | * The =pam_vprompt function constructs a string from the =fmt and =ap |
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93 | * arguments using =vsnprintf, and passes it to the given PAM context's |
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94 | * conversation function. |
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95 | * |
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96 | * The =style argument specifies the type of interaction requested, and |
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97 | * must be one of the following: |
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98 | * |
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99 | * =PAM_PROMPT_ECHO_OFF: |
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100 | * Display the message and obtain the user's response without |
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101 | * displaying it. |
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102 | * =PAM_PROMPT_ECHO_ON: |
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103 | * Display the message and obtain the user's response. |
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104 | * =PAM_ERROR_MSG: |
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105 | * Display the message as an error message, and do not wait |
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106 | * for a response. |
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107 | * =PAM_TEXT_INFO: |
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108 | * Display the message as an informational message, and do |
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109 | * not wait for a response. |
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110 | * |
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111 | * A pointer to the response, or =NULL if the conversation function did |
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112 | * not return one, is stored in the location pointed to by the =resp |
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113 | * argument. |
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114 | * |
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115 | * The message and response should not exceed =PAM_MAX_MSG_SIZE or |
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116 | * =PAM_MAX_RESP_SIZE, respectively. |
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117 | * If they do, they may be truncated. |
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118 | * |
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119 | * >pam_error |
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120 | * >pam_info |
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121 | * >pam_prompt |
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122 | * >pam_verror |
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123 | * >pam_vinfo |
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124 | */ |
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