1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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4 | * / __| | | | |_) | |
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5 | * | (__| |_| | _ <| |___
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6 | * \___|\___/|_| \_\_____|
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7 | *
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8 | * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 | *
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10 | * This software is licensed as described in the file COPYING, which
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11 | * you should have received as part of this distribution. The terms
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12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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13 | *
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14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 | * copies of the Software, and permit persons to whom the Software is
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16 | * furnished to do so, under the terms of the COPYING file.
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17 | *
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18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 | * KIND, either express or implied.
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20 | *
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21 | ***************************************************************************/
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22 |
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23 | #include "curl_setup.h"
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24 |
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25 | #if !defined(CURL_DISABLE_HTTP) && defined(USE_NTLM)
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26 |
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27 | /*
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28 | * NTLM details:
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29 | *
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30 | * http://davenport.sourceforge.net/ntlm.html
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31 | * http://www.innovation.ch/java/ntlm.html
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32 | */
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33 |
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34 | #define DEBUG_ME 0
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35 |
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36 | #include "urldata.h"
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37 | #include "sendf.h"
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38 | #include "rawstr.h"
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39 | #include "curl_ntlm.h"
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40 | #include "curl_ntlm_msgs.h"
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41 | #include "curl_ntlm_wb.h"
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42 | #include "curl_sasl.h"
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43 | #include "url.h"
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44 | #include "curl_printf.h"
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45 |
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46 | #if defined(USE_NSS)
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47 | #include "vtls/nssg.h"
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48 | #elif defined(USE_WINDOWS_SSPI)
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49 | #include "curl_sspi.h"
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50 | #endif
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51 |
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52 | /* The last #include files should be: */
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53 | #include "curl_memory.h"
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54 | #include "memdebug.h"
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55 |
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56 | #if DEBUG_ME
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57 | # define DEBUG_OUT(x) x
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58 | #else
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59 | # define DEBUG_OUT(x) Curl_nop_stmt
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60 | #endif
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61 |
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62 | CURLcode Curl_input_ntlm(struct connectdata *conn,
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63 | bool proxy, /* if proxy or not */
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64 | const char *header) /* rest of the www-authenticate:
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65 | header */
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66 | {
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67 | /* point to the correct struct with this */
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68 | struct ntlmdata *ntlm;
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69 | CURLcode result = CURLE_OK;
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70 |
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71 | ntlm = proxy ? &conn->proxyntlm : &conn->ntlm;
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72 |
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73 | if(checkprefix("NTLM", header)) {
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74 | header += strlen("NTLM");
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75 |
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76 | while(*header && ISSPACE(*header))
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77 | header++;
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78 |
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79 | if(*header) {
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80 | result = Curl_sasl_decode_ntlm_type2_message(conn->data, header, ntlm);
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81 | if(result)
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82 | return result;
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83 |
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84 | ntlm->state = NTLMSTATE_TYPE2; /* We got a type-2 message */
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85 | }
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86 | else {
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87 | if(ntlm->state == NTLMSTATE_LAST) {
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88 | infof(conn->data, "NTLM auth restarted\n");
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89 | Curl_http_ntlm_cleanup(conn);
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90 | }
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91 | else if(ntlm->state == NTLMSTATE_TYPE3) {
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92 | infof(conn->data, "NTLM handshake rejected\n");
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93 | Curl_http_ntlm_cleanup(conn);
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94 | ntlm->state = NTLMSTATE_NONE;
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95 | return CURLE_REMOTE_ACCESS_DENIED;
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96 | }
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97 | else if(ntlm->state >= NTLMSTATE_TYPE1) {
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98 | infof(conn->data, "NTLM handshake failure (internal error)\n");
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99 | return CURLE_REMOTE_ACCESS_DENIED;
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100 | }
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101 |
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102 | ntlm->state = NTLMSTATE_TYPE1; /* We should send away a type-1 */
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103 | }
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104 | }
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105 |
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106 | return result;
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107 | }
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108 |
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109 | /*
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110 | * This is for creating ntlm header output
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111 | */
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112 | CURLcode Curl_output_ntlm(struct connectdata *conn, bool proxy)
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113 | {
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114 | char *base64 = NULL;
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115 | size_t len = 0;
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116 | CURLcode result;
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117 |
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118 | /* point to the address of the pointer that holds the string to send to the
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119 | server, which is for a plain host or for a HTTP proxy */
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120 | char **allocuserpwd;
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121 |
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122 | /* point to the name and password for this */
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123 | const char *userp;
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124 | const char *passwdp;
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125 |
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126 | /* point to the correct struct with this */
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127 | struct ntlmdata *ntlm;
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128 | struct auth *authp;
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129 |
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130 | DEBUGASSERT(conn);
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131 | DEBUGASSERT(conn->data);
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132 |
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133 | #ifdef USE_NSS
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134 | if(CURLE_OK != Curl_nss_force_init(conn->data))
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135 | return CURLE_OUT_OF_MEMORY;
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136 | #endif
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137 |
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138 | if(proxy) {
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139 | allocuserpwd = &conn->allocptr.proxyuserpwd;
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140 | userp = conn->proxyuser;
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141 | passwdp = conn->proxypasswd;
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142 | ntlm = &conn->proxyntlm;
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143 | authp = &conn->data->state.authproxy;
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144 | }
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145 | else {
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146 | allocuserpwd = &conn->allocptr.userpwd;
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147 | userp = conn->user;
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148 | passwdp = conn->passwd;
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149 | ntlm = &conn->ntlm;
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150 | authp = &conn->data->state.authhost;
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151 | }
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152 | authp->done = FALSE;
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153 |
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154 | /* not set means empty */
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155 | if(!userp)
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156 | userp = "";
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157 |
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158 | if(!passwdp)
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159 | passwdp = "";
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160 |
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161 | #ifdef USE_WINDOWS_SSPI
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162 | if(s_hSecDll == NULL) {
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163 | /* not thread safe and leaks - use curl_global_init() to avoid */
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164 | CURLcode err = Curl_sspi_global_init();
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165 | if(s_hSecDll == NULL)
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166 | return err;
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167 | }
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168 | #endif
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169 |
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170 | switch(ntlm->state) {
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171 | case NTLMSTATE_TYPE1:
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172 | default: /* for the weird cases we (re)start here */
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173 | /* Create a type-1 message */
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174 | result = Curl_sasl_create_ntlm_type1_message(userp, passwdp, ntlm, &base64,
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175 | &len);
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176 | if(result)
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177 | return result;
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178 |
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179 | if(base64) {
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180 | free(*allocuserpwd);
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181 | *allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
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182 | proxy ? "Proxy-" : "",
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183 | base64);
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184 | free(base64);
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185 | if(!*allocuserpwd)
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186 | return CURLE_OUT_OF_MEMORY;
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187 |
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188 | DEBUG_OUT(fprintf(stderr, "**** Header %s\n ", *allocuserpwd));
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189 | }
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190 | break;
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191 |
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192 | case NTLMSTATE_TYPE2:
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193 | /* We already received the type-2 message, create a type-3 message */
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194 | result = Curl_sasl_create_ntlm_type3_message(conn->data, userp, passwdp,
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195 | ntlm, &base64, &len);
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196 | if(result)
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197 | return result;
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198 |
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199 | if(base64) {
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200 | free(*allocuserpwd);
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201 | *allocuserpwd = aprintf("%sAuthorization: NTLM %s\r\n",
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202 | proxy ? "Proxy-" : "",
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203 | base64);
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204 | free(base64);
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205 | if(!*allocuserpwd)
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206 | return CURLE_OUT_OF_MEMORY;
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207 |
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208 | DEBUG_OUT(fprintf(stderr, "**** %s\n ", *allocuserpwd));
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209 |
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210 | ntlm->state = NTLMSTATE_TYPE3; /* we send a type-3 */
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211 | authp->done = TRUE;
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212 | }
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213 | break;
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214 |
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215 | case NTLMSTATE_TYPE3:
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216 | /* connection is already authenticated,
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217 | * don't send a header in future requests */
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218 | ntlm->state = NTLMSTATE_LAST;
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219 | /* fall-through */
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220 | case NTLMSTATE_LAST:
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221 | Curl_safefree(*allocuserpwd);
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222 | authp->done = TRUE;
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223 | break;
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224 | }
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225 |
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226 | return CURLE_OK;
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227 | }
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228 |
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229 | void Curl_http_ntlm_cleanup(struct connectdata *conn)
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230 | {
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231 | Curl_sasl_ntlm_cleanup(&conn->ntlm);
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232 | Curl_sasl_ntlm_cleanup(&conn->proxyntlm);
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233 |
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234 | #if defined(NTLM_WB_ENABLED)
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235 | Curl_ntlm_wb_cleanup(conn);
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236 | #endif
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237 | }
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238 |
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239 | #endif /* !CURL_DISABLE_HTTP && USE_NTLM */
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