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1 /* ========================================================================
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2 * Copyright 1988-2006 University of Washington
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3 *
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4 * Licensed under the Apache License, Version 2.0 (the "License");
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5 * you may not use this file except in compliance with the License.
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6 * You may obtain a copy of the License at
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7 *
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8 * http://www.apache.org/licenses/LICENSE-2.0
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9 *
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10 *
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11 * ========================================================================
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12 */
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13
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14 /*
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15 * Program: Login authenticator
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16 *
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17 * Author: Mark Crispin
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18 * Networks and Distributed Computing
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19 * Computing & Communications
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20 * University of Washington
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21 * Administration Building, AG-44
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22 * Seattle, WA 98195
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23 * Internet: MRC@CAC.Washington.EDU
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24 *
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25 * Date: 5 December 1995
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26 * Last Edited: 30 August 2006
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27 */
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28
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29 long auth_login_client (authchallenge_t challenger,authrespond_t responder,
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30 char *service,NETMBX *mb,void *stream,
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31 unsigned long *trial,char *user);
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32 char *auth_login_server (authresponse_t responder,int argc,char *argv[]);
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33
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34 AUTHENTICATOR auth_log = {
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35 AU_HIDE, /* hidden */
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36 "LOGIN", /* authenticator name */
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37 NIL, /* always valid */
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38 auth_login_client, /* client method */
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39 auth_login_server, /* server method */
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40 NIL /* next authenticator */
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41 };
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42
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43 #define PWD_USER "User Name"
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44 #define PWD_PWD "Password"
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45
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46 /* Client authenticator
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47 * Accepts: challenger function
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48 * responder function
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49 * SASL service name
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50 * parsed network mailbox structure
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51 * stream argument for functions
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52 * pointer to current trial count
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53 * returned user name
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54 * Returns: T if success, NIL otherwise, number of trials incremented if retry
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55 */
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56
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57 long auth_login_client (authchallenge_t challenger,authrespond_t responder,
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58 char *service,NETMBX *mb,void *stream,
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59 unsigned long *trial,char *user)
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60 {
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61 char pwd[MAILTMPLEN];
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62 void *challenge;
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63 unsigned long clen;
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64 long ret = NIL;
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65 /* get user name prompt */
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66 if (challenge = (*challenger) (stream,&clen)) {
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67 fs_give ((void **) &challenge);
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68 pwd[0] = NIL; /* prompt user */
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69 mm_login (mb,user,pwd,*trial);
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70 if (!pwd[0]) { /* user requested abort */
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71 (*responder) (stream,NIL,0);
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72 *trial = 0; /* cancel subsequent attempts */
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73 ret = LONGT; /* will get a BAD response back */
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74 }
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75 /* send user name */
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76 else if ((*responder) (stream,user,strlen (user)) &&
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77 (challenge = (*challenger) (stream,&clen))) {
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78 fs_give ((void **) &challenge);
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79 /* send password */
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80 if ((*responder) (stream,pwd,strlen (pwd))) {
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81 if (challenge = (*challenger) (stream,&clen))
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82 fs_give ((void **) &challenge);
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83 else {
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84 ++*trial; /* can try again if necessary */
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85 ret = LONGT; /* check the authentication */
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86 }
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87 }
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88 }
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89 }
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90 memset (pwd,0,MAILTMPLEN); /* erase password */
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91 if (!ret) *trial = 65535; /* don't retry if bad protocol */
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92 return ret;
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93 }
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94
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95
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96 /* Server authenticator
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97 * Accepts: responder function
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98 * argument count
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99 * argument vector
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100 * Returns: authenticated user name or NIL
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101 */
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102
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103 char *auth_login_server (authresponse_t responder,int argc,char *argv[])
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104 {
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105 char *ret = NIL;
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106 char *user,*pass,*authuser;
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107 if (user = (*responder) (PWD_USER,sizeof (PWD_USER),NIL)) {
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108 #ifdef QMAIL
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109 extern char* conv_virtualdomain(char*);
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110 user = conv_virtualdomain(user);
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111 #endif
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112 if (pass = (*responder) (PWD_PWD,sizeof (PWD_PWD),NIL)) {
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113 /* delimit user from possible admin */
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114 if (authuser = strchr (user,'*')) *authuser++ = '\0';
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115 if (server_login (user,pass,authuser,argc,argv)) ret = myusername ();
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116 fs_give ((void **) &pass);
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117 }
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118 fs_give ((void **) &user);
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119 }
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120 return ret;
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121 }
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