1 | /* |
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2 | * Deals with the authorizer (group 0x0017=23, and old-style non-SNAC login). |
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3 | * |
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4 | */ |
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5 | |
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6 | #define FAIM_INTERNAL |
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7 | #include <aim.h> |
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8 | |
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9 | #include "md5.h" |
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10 | |
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11 | static int aim_encode_password(const char *password, unsigned char *encoded); |
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12 | |
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13 | /* |
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14 | * This just pushes the passed cookie onto the passed connection, without |
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15 | * the SNAC header or any of that. |
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16 | * |
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17 | * Very commonly used, as every connection except auth will require this to |
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18 | * be the first thing you send. |
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19 | * |
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20 | */ |
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21 | faim_export int aim_sendcookie(aim_session_t *sess, aim_conn_t *conn, const fu8_t *chipsahoy) |
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22 | { |
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23 | aim_frame_t *fr; |
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24 | aim_tlvlist_t *tl = NULL; |
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25 | |
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26 | if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x0001, 4+2+2+AIM_COOKIELEN))) |
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27 | return -ENOMEM; |
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28 | |
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29 | aimbs_put32(&fr->data, 0x00000001); |
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30 | aim_addtlvtochain_raw(&tl, 0x0006, AIM_COOKIELEN, chipsahoy); |
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31 | aim_writetlvchain(&fr->data, &tl); |
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32 | aim_freetlvchain(&tl); |
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33 | |
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34 | aim_tx_enqueue(sess, fr); |
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35 | |
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36 | return 0; |
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37 | } |
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38 | |
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39 | /* |
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40 | * Normally the FLAP version is sent as the first few bytes of the cookie, |
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41 | * meaning you generally never call this. |
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42 | * |
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43 | * But there are times when something might want it seperate. Specifically, |
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44 | * libfaim sends this internally when doing SNAC login. |
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45 | * |
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46 | */ |
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47 | faim_export int aim_sendflapver(aim_session_t *sess, aim_conn_t *conn) |
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48 | { |
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49 | aim_frame_t *fr; |
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50 | |
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51 | if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x01, 4))) |
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52 | return -ENOMEM; |
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53 | |
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54 | aimbs_put32(&fr->data, 0x00000001); |
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55 | |
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56 | aim_tx_enqueue(sess, fr); |
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57 | |
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58 | return 0; |
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59 | } |
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60 | |
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61 | /* |
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62 | * This is a bit confusing. |
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63 | * |
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64 | * Normal SNAC login goes like this: |
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65 | * - connect |
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66 | * - server sends flap version |
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67 | * - client sends flap version |
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68 | * - client sends screen name (17/6) |
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69 | * - server sends hash key (17/7) |
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70 | * - client sends auth request (17/2 -- aim_send_login) |
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71 | * - server yells |
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72 | * |
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73 | * XOR login (for ICQ) goes like this: |
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74 | * - connect |
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75 | * - server sends flap version |
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76 | * - client sends auth request which contains flap version (aim_send_login) |
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77 | * - server yells |
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78 | * |
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79 | * For the client API, we make them implement the most complicated version, |
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80 | * and for the simpler version, we fake it and make it look like the more |
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81 | * complicated process. |
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82 | * |
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83 | * This is done by giving the client a faked key, just so we can convince |
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84 | * them to call aim_send_login right away, which will detect the session |
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85 | * flag that says this is XOR login and ignore the key, sending an ICQ |
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86 | * login request instead of the normal SNAC one. |
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87 | * |
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88 | * As soon as AOL makes ICQ log in the same way as AIM, this is /gone/. |
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89 | * |
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90 | * XXX This may cause problems if the client relies on callbacks only |
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91 | * being called from the context of aim_rxdispatch()... |
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92 | * |
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93 | */ |
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94 | static int goddamnicq(aim_session_t *sess, aim_conn_t *conn, const char *sn) |
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95 | { |
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96 | aim_frame_t fr; |
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97 | aim_rxcallback_t userfunc; |
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98 | |
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99 | sess->flags &= ~AIM_SESS_FLAGS_SNACLOGIN; |
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100 | sess->flags |= AIM_SESS_FLAGS_XORLOGIN; |
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101 | |
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102 | fr.conn = conn; |
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103 | |
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104 | if ((userfunc = aim_callhandler(sess, conn, 0x0017, 0x0007))) |
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105 | userfunc(sess, &fr, ""); |
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106 | |
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107 | return 0; |
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108 | } |
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109 | |
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110 | /* |
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111 | * In AIM 3.5 protocol, the first stage of login is to request login from the |
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112 | * Authorizer, passing it the screen name for verification. If the name is |
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113 | * invalid, a 0017/0003 is spit back, with the standard error contents. If |
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114 | * valid, a 0017/0007 comes back, which is the signal to send it the main |
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115 | * login command (0017/0002). |
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116 | * |
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117 | */ |
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118 | faim_export int aim_request_login(aim_session_t *sess, aim_conn_t *conn, const char *sn) |
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119 | { |
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120 | aim_frame_t *fr; |
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121 | aim_snacid_t snacid; |
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122 | aim_tlvlist_t *tl = NULL; |
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123 | |
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124 | if (!sess || !conn || !sn) |
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125 | return -EINVAL; |
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126 | |
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127 | if ((sn[0] >= '0') && (sn[0] <= '9')) |
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128 | return goddamnicq(sess, conn, sn); |
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129 | |
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130 | sess->flags |= AIM_SESS_FLAGS_SNACLOGIN; |
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131 | |
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132 | aim_sendflapver(sess, conn); |
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133 | |
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134 | if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 10+2+2+strlen(sn)))) |
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135 | return -ENOMEM; |
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136 | |
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137 | snacid = aim_cachesnac(sess, 0x0017, 0x0006, 0x0000, NULL, 0); |
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138 | aim_putsnac(&fr->data, 0x0017, 0x0006, 0x0000, snacid); |
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139 | |
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140 | aim_addtlvtochain_raw(&tl, 0x0001, strlen(sn), sn); |
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141 | aim_writetlvchain(&fr->data, &tl); |
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142 | aim_freetlvchain(&tl); |
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143 | |
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144 | aim_tx_enqueue(sess, fr); |
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145 | |
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146 | return 0; |
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147 | } |
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148 | |
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149 | /* |
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150 | * Part two of the ICQ hack. Note the ignoring of the key and clientinfo. |
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151 | */ |
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152 | static int goddamnicq2(aim_session_t *sess, aim_conn_t *conn, const char *sn, const char *password) |
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153 | { |
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154 | static const char clientstr[] = {"ICQ Inc. - Product of ICQ (TM) 2000b.4.65.1.3281.85"}; |
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155 | static const char lang[] = {"en"}; |
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156 | static const char country[] = {"us"}; |
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157 | aim_frame_t *fr; |
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158 | aim_tlvlist_t *tl = NULL; |
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159 | char *password_encoded; |
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160 | |
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161 | if (!(password_encoded = (char *) malloc(strlen(password)))) |
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162 | return -ENOMEM; |
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163 | |
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164 | if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x01, 1152))) { |
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165 | free(password_encoded); |
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166 | return -ENOMEM; |
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167 | } |
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168 | |
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169 | aim_encode_password(password, password_encoded); |
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170 | |
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171 | aimbs_put32(&fr->data, 0x00000001); |
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172 | aim_addtlvtochain_raw(&tl, 0x0001, strlen(sn), sn); |
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173 | aim_addtlvtochain_raw(&tl, 0x0002, strlen(password), password_encoded); |
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174 | aim_addtlvtochain_raw(&tl, 0x0003, strlen(clientstr), clientstr); |
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175 | aim_addtlvtochain16(&tl, 0x0016, 0x010a); /* cliend ID */ |
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176 | aim_addtlvtochain16(&tl, 0x0017, 0x0004); /* major version */ |
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177 | aim_addtlvtochain16(&tl, 0x0018, 0x0041); /* minor version */ |
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178 | aim_addtlvtochain16(&tl, 0x0019, 0x0001); /* point version */ |
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179 | aim_addtlvtochain16(&tl, 0x001a, 0x0cd1); /* build */ |
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180 | aim_addtlvtochain32(&tl, 0x0014, 0x00000055); /* distribution chan */ |
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181 | aim_addtlvtochain_raw(&tl, 0x000f, strlen(lang), lang); |
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182 | aim_addtlvtochain_raw(&tl, 0x000e, strlen(country), country); |
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183 | |
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184 | aim_writetlvchain(&fr->data, &tl); |
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185 | |
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186 | free(password_encoded); |
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187 | aim_freetlvchain(&tl); |
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188 | |
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189 | aim_tx_enqueue(sess, fr); |
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190 | |
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191 | return 0; |
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192 | } |
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193 | |
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194 | /* |
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195 | * send_login(int socket, char *sn, char *password) |
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196 | * |
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197 | * This is the initial login request packet. |
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198 | * |
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199 | * NOTE!! If you want/need to make use of the aim_sendmemblock() function, |
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200 | * then the client information you send here must exactly match the |
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201 | * executable that you're pulling the data from. |
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202 | * |
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203 | * WinAIM 4.8.2540 |
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204 | * clientstring = "AOL Instant Messenger (SM), version 4.8.2540/WIN32" |
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205 | * clientid = 0x0109 |
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206 | * major = 0x0004 |
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207 | * minor = 0x0008 |
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208 | * point = 0x0000 |
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209 | * build = 0x09ec |
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210 | * t(0x0014) = 0x000000af |
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211 | * t(0x004a) = 0x01 |
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212 | * |
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213 | * WinAIM 4.3.2188: |
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214 | * clientstring = "AOL Instant Messenger (SM), version 4.3.2188/WIN32" |
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215 | * clientid = 0x0109 |
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216 | * major = 0x0400 |
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217 | * minor = 0x0003 |
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218 | * point = 0x0000 |
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219 | * build = 0x088c |
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220 | * unknown = 0x00000086 |
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221 | * lang = "en" |
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222 | * country = "us" |
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223 | * unknown4a = 0x01 |
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224 | * |
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225 | * Latest WinAIM that libfaim can emulate without server-side buddylists: |
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226 | * clientstring = "AOL Instant Messenger (SM), version 4.1.2010/WIN32" |
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227 | * clientid = 0x0004 |
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228 | * major = 0x0004 |
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229 | * minor = 0x0001 |
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230 | * point = 0x0000 |
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231 | * build = 0x07da |
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232 | * unknown= 0x0000004b |
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233 | * |
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234 | * WinAIM 3.5.1670: |
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235 | * clientstring = "AOL Instant Messenger (SM), version 3.5.1670/WIN32" |
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236 | * clientid = 0x0004 |
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237 | * major = 0x0003 |
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238 | * minor = 0x0005 |
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239 | * point = 0x0000 |
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240 | * build = 0x0686 |
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241 | * unknown =0x0000002a |
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242 | * |
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243 | * Java AIM 1.1.19: |
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244 | * clientstring = "AOL Instant Messenger (TM) version 1.1.19 for Java built 03/24/98, freeMem 215871 totalMem 1048567, i686, Linus, #2 SMP Sun Feb 11 03:41:17 UTC 2001 2.4.1-ac9, IBM Corporation, 1.1.8, 45.3, Tue Mar 27 12:09:17 PST 2001" |
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245 | * clientid = 0x0001 |
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246 | * major = 0x0001 |
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247 | * minor = 0x0001 |
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248 | * point = (not sent) |
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249 | * build = 0x0013 |
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250 | * unknown= (not sent) |
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251 | * |
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252 | * AIM for Linux 1.1.112: |
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253 | * clientstring = "AOL Instant Messenger (SM)" |
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254 | * clientid = 0x1d09 |
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255 | * major = 0x0001 |
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256 | * minor = 0x0001 |
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257 | * point = 0x0001 |
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258 | * build = 0x0070 |
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259 | * unknown= 0x0000008b |
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260 | * serverstore = 0x01 |
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261 | * |
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262 | */ |
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263 | faim_export int aim_send_login(aim_session_t *sess, aim_conn_t *conn, const char *sn, const char *password, struct client_info_s *ci, const char *key) |
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264 | { |
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265 | aim_frame_t *fr; |
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266 | aim_tlvlist_t *tl = NULL; |
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267 | fu8_t digest[16]; |
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268 | aim_snacid_t snacid; |
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269 | |
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270 | if (!ci || !sn || !password) |
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271 | return -EINVAL; |
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272 | |
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273 | /* |
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274 | * What the XORLOGIN flag _really_ means is that its an ICQ login, |
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275 | * which is really stupid and painful, so its not done here. |
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276 | * |
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277 | */ |
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278 | if (sess->flags & AIM_SESS_FLAGS_XORLOGIN) |
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279 | return goddamnicq2(sess, conn, sn, password); |
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280 | |
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281 | |
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282 | if (!(fr = aim_tx_new(sess, conn, AIM_FRAMETYPE_FLAP, 0x02, 1152))) |
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283 | return -ENOMEM; |
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284 | |
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285 | snacid = aim_cachesnac(sess, 0x0017, 0x0002, 0x0000, NULL, 0); |
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286 | aim_putsnac(&fr->data, 0x0017, 0x0002, 0x0000, snacid); |
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287 | |
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288 | aim_addtlvtochain_raw(&tl, 0x0001, strlen(sn), sn); |
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289 | |
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290 | aim_encode_password_md5(password, key, digest); |
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291 | aim_addtlvtochain_raw(&tl, 0x0025, 16, digest); |
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292 | |
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293 | if (ci->clientstring) |
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294 | aim_addtlvtochain_raw(&tl, 0x0003, strlen(ci->clientstring), ci->clientstring); |
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295 | aim_addtlvtochain16(&tl, 0x0016, (fu16_t)ci->clientid); |
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296 | aim_addtlvtochain16(&tl, 0x0017, (fu16_t)ci->major); |
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297 | aim_addtlvtochain16(&tl, 0x0018, (fu16_t)ci->minor); |
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298 | aim_addtlvtochain16(&tl, 0x0019, (fu16_t)ci->point); |
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299 | aim_addtlvtochain16(&tl, 0x001a, (fu16_t)ci->build); |
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300 | aim_addtlvtochain_raw(&tl, 0x000e, strlen(ci->country), ci->country); |
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301 | aim_addtlvtochain_raw(&tl, 0x000f, strlen(ci->lang), ci->lang); |
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302 | |
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303 | /* |
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304 | * If set, old-fashioned buddy lists will not work. You will need |
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305 | * to use SSI. |
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306 | */ |
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307 | if (0) |
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308 | aim_addtlvtochain8(&tl, 0x004a, 0x01); |
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309 | |
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310 | aim_writetlvchain(&fr->data, &tl); |
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311 | |
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312 | aim_freetlvchain(&tl); |
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313 | |
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314 | aim_tx_enqueue(sess, fr); |
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315 | |
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316 | return 0; |
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317 | } |
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318 | |
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319 | faim_export int aim_encode_password_md5(const char *password, const char *key, fu8_t *digest) |
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320 | { |
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321 | md5_state_t state; |
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322 | |
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323 | md5_init(&state); |
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324 | md5_append(&state, (const md5_byte_t *)key, strlen(key)); |
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325 | md5_append(&state, (const md5_byte_t *)password, strlen(password)); |
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326 | md5_append(&state, (const md5_byte_t *)AIM_MD5_STRING, strlen(AIM_MD5_STRING)); |
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327 | md5_finish(&state, (md5_byte_t *)digest); |
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328 | |
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329 | return 0; |
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330 | } |
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331 | |
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332 | /** |
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333 | * aim_encode_password - Encode a password using old XOR method |
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334 | * @password: incoming password |
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335 | * @encoded: buffer to put encoded password |
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336 | * |
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337 | * This takes a const pointer to a (null terminated) string |
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338 | * containing the unencoded password. It also gets passed |
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339 | * an already allocated buffer to store the encoded password. |
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340 | * This buffer should be the exact length of the password without |
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341 | * the null. The encoded password buffer /is not %NULL terminated/. |
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342 | * |
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343 | * The encoding_table seems to be a fixed set of values. We'll |
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344 | * hope it doesn't change over time! |
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345 | * |
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346 | * This is only used for the XOR method, not the better MD5 method. |
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347 | * |
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348 | */ |
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349 | static int aim_encode_password(const char *password, fu8_t *encoded) |
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350 | { |
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351 | fu8_t encoding_table[] = { |
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352 | #if 0 /* old v1 table */ |
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353 | 0xf3, 0xb3, 0x6c, 0x99, |
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354 | 0x95, 0x3f, 0xac, 0xb6, |
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355 | 0xc5, 0xfa, 0x6b, 0x63, |
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356 | 0x69, 0x6c, 0xc3, 0x9f |
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357 | #else /* v2.1 table, also works for ICQ */ |
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358 | 0xf3, 0x26, 0x81, 0xc4, |
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359 | 0x39, 0x86, 0xdb, 0x92, |
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360 | 0x71, 0xa3, 0xb9, 0xe6, |
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361 | 0x53, 0x7a, 0x95, 0x7c |
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362 | #endif |
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363 | }; |
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364 | int i; |
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365 | |
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366 | for (i = 0; i < strlen(password); i++) |
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367 | encoded[i] = (password[i] ^ encoding_table[i]); |
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368 | |
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369 | return 0; |
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370 | } |
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371 | |
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372 | /* |
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373 | * This is sent back as a general response to the login command. |
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374 | * It can be either an error or a success, depending on the |
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375 | * precense of certain TLVs. |
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376 | * |
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377 | * The client should check the value passed as errorcode. If |
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378 | * its nonzero, there was an error. |
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379 | * |
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380 | */ |
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381 | static int parse(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs) |
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382 | { |
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383 | aim_tlvlist_t *tlvlist; |
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384 | aim_rxcallback_t userfunc; |
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385 | struct aim_authresp_info info; |
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386 | int ret = 0; |
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387 | |
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388 | memset(&info, 0, sizeof(info)); |
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389 | |
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390 | /* |
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391 | * Read block of TLVs. All further data is derived |
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392 | * from what is parsed here. |
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393 | */ |
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394 | tlvlist = aim_readtlvchain(bs); |
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395 | |
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396 | /* |
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397 | * No matter what, we should have a screen name. |
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398 | */ |
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399 | memset(sess->sn, 0, sizeof(sess->sn)); |
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400 | if (aim_gettlv(tlvlist, 0x0001, 1)) { |
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401 | info.sn = aim_gettlv_str(tlvlist, 0x0001, 1); |
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402 | strncpy(sess->sn, info.sn, sizeof(sess->sn)); |
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403 | } |
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404 | |
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405 | /* |
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406 | * Check for an error code. If so, we should also |
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407 | * have an error url. |
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408 | */ |
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409 | if (aim_gettlv(tlvlist, 0x0008, 1)) |
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410 | info.errorcode = aim_gettlv16(tlvlist, 0x0008, 1); |
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411 | if (aim_gettlv(tlvlist, 0x0004, 1)) |
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412 | info.errorurl = aim_gettlv_str(tlvlist, 0x0004, 1); |
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413 | |
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414 | /* |
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415 | * BOS server address. |
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416 | */ |
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417 | if (aim_gettlv(tlvlist, 0x0005, 1)) |
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418 | info.bosip = aim_gettlv_str(tlvlist, 0x0005, 1); |
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419 | |
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420 | /* |
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421 | * Authorization cookie. |
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422 | */ |
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423 | if (aim_gettlv(tlvlist, 0x0006, 1)) { |
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424 | aim_tlv_t *tmptlv; |
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425 | |
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426 | tmptlv = aim_gettlv(tlvlist, 0x0006, 1); |
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427 | |
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428 | info.cookie = tmptlv->value; |
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429 | } |
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430 | |
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431 | /* |
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432 | * The email address attached to this account |
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433 | * Not available for ICQ logins. |
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434 | */ |
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435 | if (aim_gettlv(tlvlist, 0x0011, 1)) |
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436 | info.email = aim_gettlv_str(tlvlist, 0x0011, 1); |
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437 | |
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438 | /* |
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439 | * The registration status. (Not real sure what it means.) |
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440 | * Not available for ICQ logins. |
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441 | * |
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442 | * 1 = No disclosure |
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443 | * 2 = Limited disclosure |
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444 | * 3 = Full disclosure |
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445 | * |
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446 | * This has to do with whether your email address is available |
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447 | * to other users or not. AFAIK, this feature is no longer used. |
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448 | * |
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449 | */ |
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450 | if (aim_gettlv(tlvlist, 0x0013, 1)) |
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451 | info.regstatus = aim_gettlv16(tlvlist, 0x0013, 1); |
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452 | |
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453 | if (aim_gettlv(tlvlist, 0x0040, 1)) |
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454 | info.latestbeta.build = aim_gettlv32(tlvlist, 0x0040, 1); |
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455 | if (aim_gettlv(tlvlist, 0x0041, 1)) |
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456 | info.latestbeta.url = aim_gettlv_str(tlvlist, 0x0041, 1); |
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457 | if (aim_gettlv(tlvlist, 0x0042, 1)) |
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458 | info.latestbeta.info = aim_gettlv_str(tlvlist, 0x0042, 1); |
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459 | if (aim_gettlv(tlvlist, 0x0043, 1)) |
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460 | info.latestbeta.name = aim_gettlv_str(tlvlist, 0x0043, 1); |
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461 | if (aim_gettlv(tlvlist, 0x0048, 1)) |
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462 | ; /* no idea what this is */ |
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463 | |
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464 | if (aim_gettlv(tlvlist, 0x0044, 1)) |
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465 | info.latestrelease.build = aim_gettlv32(tlvlist, 0x0044, 1); |
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466 | if (aim_gettlv(tlvlist, 0x0045, 1)) |
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467 | info.latestrelease.url = aim_gettlv_str(tlvlist, 0x0045, 1); |
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468 | if (aim_gettlv(tlvlist, 0x0046, 1)) |
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469 | info.latestrelease.info = aim_gettlv_str(tlvlist, 0x0046, 1); |
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470 | if (aim_gettlv(tlvlist, 0x0047, 1)) |
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471 | info.latestrelease.name = aim_gettlv_str(tlvlist, 0x0047, 1); |
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472 | if (aim_gettlv(tlvlist, 0x0049, 1)) |
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473 | ; /* no idea what this is */ |
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474 | |
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475 | |
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476 | if ((userfunc = aim_callhandler(sess, rx->conn, snac ? snac->family : 0x0017, snac ? snac->subtype : 0x0003))) |
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477 | ret = userfunc(sess, rx, &info); |
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478 | |
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479 | free(info.sn); |
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480 | free(info.bosip); |
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481 | free(info.errorurl); |
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482 | free(info.email); |
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483 | free(info.latestrelease.name); |
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484 | free(info.latestrelease.url); |
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485 | free(info.latestrelease.info); |
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486 | free(info.latestbeta.name); |
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487 | free(info.latestbeta.url); |
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488 | free(info.latestbeta.info); |
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489 | |
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490 | aim_freetlvchain(&tlvlist); |
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491 | |
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492 | return ret; |
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493 | } |
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494 | |
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495 | /* |
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496 | * Middle handler for 0017/0007 SNACs. Contains the auth key prefixed |
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497 | * by only its length in a two byte word. |
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498 | * |
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499 | * Calls the client, which should then use the value to call aim_send_login. |
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500 | * |
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501 | */ |
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502 | static int keyparse(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs) |
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503 | { |
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504 | int keylen, ret = 1; |
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505 | aim_rxcallback_t userfunc; |
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506 | char *keystr; |
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507 | |
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508 | keylen = aimbs_get16(bs); |
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509 | keystr = aimbs_getstr(bs, keylen); |
---|
510 | |
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511 | if ((userfunc = aim_callhandler(sess, rx->conn, snac->family, snac->subtype))) |
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512 | ret = userfunc(sess, rx, keystr); |
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513 | |
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514 | free(keystr); |
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515 | |
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516 | return ret; |
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517 | } |
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518 | |
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519 | static int snachandler(aim_session_t *sess, aim_module_t *mod, aim_frame_t *rx, aim_modsnac_t *snac, aim_bstream_t *bs) |
---|
520 | { |
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521 | |
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522 | if (snac->subtype == 0x0003) |
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523 | return parse(sess, mod, rx, snac, bs); |
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524 | else if (snac->subtype == 0x0007) |
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525 | return keyparse(sess, mod, rx, snac, bs); |
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526 | |
---|
527 | return 0; |
---|
528 | } |
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529 | |
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530 | faim_internal int auth_modfirst(aim_session_t *sess, aim_module_t *mod) |
---|
531 | { |
---|
532 | |
---|
533 | mod->family = 0x0017; |
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534 | mod->version = 0x0000; |
---|
535 | mod->flags = 0; |
---|
536 | strncpy(mod->name, "auth", sizeof(mod->name)); |
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537 | mod->snachandler = snachandler; |
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538 | |
---|
539 | return 0; |
---|
540 | } |
---|
541 | |
---|