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 - 2017, 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(USE_NTLM) && !defined(USE_WINDOWS_SSPI)
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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 | * https://davenport.sourceforge.io/ntlm.html
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31 | * https://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 "non-ascii.h"
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38 | #include "sendf.h"
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39 | #include "curl_base64.h"
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40 | #include "curl_ntlm_core.h"
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41 | #include "curl_gethostname.h"
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42 | #include "curl_multibyte.h"
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43 | #include "warnless.h"
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44 | #include "rand.h"
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45 | #include "vtls/vtls.h"
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46 |
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47 | /* SSL backend-specific #if branches in this file must be kept in the order
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48 | documented in curl_ntlm_core. */
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49 | #if defined(NTLM_NEEDS_NSS_INIT)
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50 | #include "vtls/nssg.h" /* for Curl_nss_force_init() */
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51 | #endif
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52 |
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53 | #define BUILDING_CURL_NTLM_MSGS_C
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54 | #include "vauth/vauth.h"
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55 | #include "vauth/ntlm.h"
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56 | #include "curl_endian.h"
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57 | #include "curl_printf.h"
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58 |
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59 | /* The last #include files should be: */
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60 | #include "curl_memory.h"
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61 | #include "memdebug.h"
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62 |
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63 | /* "NTLMSSP" signature is always in ASCII regardless of the platform */
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64 | #define NTLMSSP_SIGNATURE "\x4e\x54\x4c\x4d\x53\x53\x50"
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65 |
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66 | #define SHORTPAIR(x) ((x) & 0xff), (((x) >> 8) & 0xff)
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67 | #define LONGQUARTET(x) ((x) & 0xff), (((x) >> 8) & 0xff), \
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68 | (((x) >> 16) & 0xff), (((x) >> 24) & 0xff)
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69 |
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70 | #if DEBUG_ME
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71 | # define DEBUG_OUT(x) x
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72 | static void ntlm_print_flags(FILE *handle, unsigned long flags)
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73 | {
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74 | if(flags & NTLMFLAG_NEGOTIATE_UNICODE)
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75 | fprintf(handle, "NTLMFLAG_NEGOTIATE_UNICODE ");
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76 | if(flags & NTLMFLAG_NEGOTIATE_OEM)
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77 | fprintf(handle, "NTLMFLAG_NEGOTIATE_OEM ");
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78 | if(flags & NTLMFLAG_REQUEST_TARGET)
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79 | fprintf(handle, "NTLMFLAG_REQUEST_TARGET ");
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80 | if(flags & (1<<3))
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81 | fprintf(handle, "NTLMFLAG_UNKNOWN_3 ");
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82 | if(flags & NTLMFLAG_NEGOTIATE_SIGN)
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83 | fprintf(handle, "NTLMFLAG_NEGOTIATE_SIGN ");
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84 | if(flags & NTLMFLAG_NEGOTIATE_SEAL)
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85 | fprintf(handle, "NTLMFLAG_NEGOTIATE_SEAL ");
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86 | if(flags & NTLMFLAG_NEGOTIATE_DATAGRAM_STYLE)
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87 | fprintf(handle, "NTLMFLAG_NEGOTIATE_DATAGRAM_STYLE ");
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88 | if(flags & NTLMFLAG_NEGOTIATE_LM_KEY)
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89 | fprintf(handle, "NTLMFLAG_NEGOTIATE_LM_KEY ");
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90 | if(flags & NTLMFLAG_NEGOTIATE_NETWARE)
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91 | fprintf(handle, "NTLMFLAG_NEGOTIATE_NETWARE ");
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92 | if(flags & NTLMFLAG_NEGOTIATE_NTLM_KEY)
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93 | fprintf(handle, "NTLMFLAG_NEGOTIATE_NTLM_KEY ");
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94 | if(flags & (1<<10))
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95 | fprintf(handle, "NTLMFLAG_UNKNOWN_10 ");
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96 | if(flags & NTLMFLAG_NEGOTIATE_ANONYMOUS)
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97 | fprintf(handle, "NTLMFLAG_NEGOTIATE_ANONYMOUS ");
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98 | if(flags & NTLMFLAG_NEGOTIATE_DOMAIN_SUPPLIED)
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99 | fprintf(handle, "NTLMFLAG_NEGOTIATE_DOMAIN_SUPPLIED ");
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100 | if(flags & NTLMFLAG_NEGOTIATE_WORKSTATION_SUPPLIED)
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101 | fprintf(handle, "NTLMFLAG_NEGOTIATE_WORKSTATION_SUPPLIED ");
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102 | if(flags & NTLMFLAG_NEGOTIATE_LOCAL_CALL)
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103 | fprintf(handle, "NTLMFLAG_NEGOTIATE_LOCAL_CALL ");
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104 | if(flags & NTLMFLAG_NEGOTIATE_ALWAYS_SIGN)
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105 | fprintf(handle, "NTLMFLAG_NEGOTIATE_ALWAYS_SIGN ");
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106 | if(flags & NTLMFLAG_TARGET_TYPE_DOMAIN)
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107 | fprintf(handle, "NTLMFLAG_TARGET_TYPE_DOMAIN ");
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108 | if(flags & NTLMFLAG_TARGET_TYPE_SERVER)
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109 | fprintf(handle, "NTLMFLAG_TARGET_TYPE_SERVER ");
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110 | if(flags & NTLMFLAG_TARGET_TYPE_SHARE)
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111 | fprintf(handle, "NTLMFLAG_TARGET_TYPE_SHARE ");
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112 | if(flags & NTLMFLAG_NEGOTIATE_NTLM2_KEY)
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113 | fprintf(handle, "NTLMFLAG_NEGOTIATE_NTLM2_KEY ");
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114 | if(flags & NTLMFLAG_REQUEST_INIT_RESPONSE)
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115 | fprintf(handle, "NTLMFLAG_REQUEST_INIT_RESPONSE ");
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116 | if(flags & NTLMFLAG_REQUEST_ACCEPT_RESPONSE)
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117 | fprintf(handle, "NTLMFLAG_REQUEST_ACCEPT_RESPONSE ");
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118 | if(flags & NTLMFLAG_REQUEST_NONNT_SESSION_KEY)
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119 | fprintf(handle, "NTLMFLAG_REQUEST_NONNT_SESSION_KEY ");
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120 | if(flags & NTLMFLAG_NEGOTIATE_TARGET_INFO)
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121 | fprintf(handle, "NTLMFLAG_NEGOTIATE_TARGET_INFO ");
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122 | if(flags & (1<<24))
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123 | fprintf(handle, "NTLMFLAG_UNKNOWN_24 ");
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124 | if(flags & (1<<25))
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125 | fprintf(handle, "NTLMFLAG_UNKNOWN_25 ");
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126 | if(flags & (1<<26))
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127 | fprintf(handle, "NTLMFLAG_UNKNOWN_26 ");
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128 | if(flags & (1<<27))
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129 | fprintf(handle, "NTLMFLAG_UNKNOWN_27 ");
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130 | if(flags & (1<<28))
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131 | fprintf(handle, "NTLMFLAG_UNKNOWN_28 ");
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132 | if(flags & NTLMFLAG_NEGOTIATE_128)
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133 | fprintf(handle, "NTLMFLAG_NEGOTIATE_128 ");
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134 | if(flags & NTLMFLAG_NEGOTIATE_KEY_EXCHANGE)
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135 | fprintf(handle, "NTLMFLAG_NEGOTIATE_KEY_EXCHANGE ");
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136 | if(flags & NTLMFLAG_NEGOTIATE_56)
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137 | fprintf(handle, "NTLMFLAG_NEGOTIATE_56 ");
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138 | }
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139 |
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140 | static void ntlm_print_hex(FILE *handle, const char *buf, size_t len)
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141 | {
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142 | const char *p = buf;
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143 |
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144 | (void) handle;
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145 |
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146 | fprintf(stderr, "0x");
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147 | while(len-- > 0)
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148 | fprintf(stderr, "%02.2x", (unsigned int)*p++);
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149 | }
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150 | #else
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151 | # define DEBUG_OUT(x) Curl_nop_stmt
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152 | #endif
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153 |
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154 | /*
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155 | * ntlm_decode_type2_target()
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156 | *
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157 | * This is used to decode the "target info" in the NTLM type-2 message
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158 | * received.
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159 | *
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160 | * Parameters:
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161 | *
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162 | * data [in] - The session handle.
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163 | * buffer [in] - The decoded type-2 message.
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164 | * size [in] - The input buffer size, at least 32 bytes.
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165 | * ntlm [in/out] - The NTLM data struct being used and modified.
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166 | *
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167 | * Returns CURLE_OK on success.
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168 | */
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169 | static CURLcode ntlm_decode_type2_target(struct Curl_easy *data,
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170 | unsigned char *buffer,
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171 | size_t size,
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172 | struct ntlmdata *ntlm)
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173 | {
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174 | unsigned short target_info_len = 0;
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175 | unsigned int target_info_offset = 0;
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176 |
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177 | #if defined(CURL_DISABLE_VERBOSE_STRINGS)
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178 | (void) data;
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179 | #endif
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180 |
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181 | if(size >= 48) {
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182 | target_info_len = Curl_read16_le(&buffer[40]);
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183 | target_info_offset = Curl_read32_le(&buffer[44]);
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184 | if(target_info_len > 0) {
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185 | if(((target_info_offset + target_info_len) > size) ||
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186 | (target_info_offset < 48)) {
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187 | infof(data, "NTLM handshake failure (bad type-2 message). "
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188 | "Target Info Offset Len is set incorrect by the peer\n");
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189 | return CURLE_BAD_CONTENT_ENCODING;
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190 | }
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191 |
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192 | ntlm->target_info = malloc(target_info_len);
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193 | if(!ntlm->target_info)
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194 | return CURLE_OUT_OF_MEMORY;
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195 |
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196 | memcpy(ntlm->target_info, &buffer[target_info_offset], target_info_len);
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197 | }
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198 | }
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199 |
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200 | ntlm->target_info_len = target_info_len;
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201 |
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202 | return CURLE_OK;
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203 | }
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204 |
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205 | /*
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206 | NTLM message structure notes:
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207 |
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208 | A 'short' is a 'network short', a little-endian 16-bit unsigned value.
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209 |
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210 | A 'long' is a 'network long', a little-endian, 32-bit unsigned value.
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211 |
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212 | A 'security buffer' represents a triplet used to point to a buffer,
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213 | consisting of two shorts and one long:
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214 |
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215 | 1. A 'short' containing the length of the buffer content in bytes.
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216 | 2. A 'short' containing the allocated space for the buffer in bytes.
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217 | 3. A 'long' containing the offset to the start of the buffer in bytes,
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218 | from the beginning of the NTLM message.
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219 | */
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220 |
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221 | /*
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222 | * Curl_auth_is_ntlm_supported()
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223 | *
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224 | * This is used to evaluate if NTLM is supported.
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225 | *
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226 | * Parameters: None
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227 | *
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228 | * Returns TRUE as NTLM as handled by libcurl.
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229 | */
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230 | bool Curl_auth_is_ntlm_supported(void)
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231 | {
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232 | return TRUE;
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233 | }
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234 |
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235 | /*
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236 | * Curl_auth_decode_ntlm_type2_message()
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237 | *
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238 | * This is used to decode an already encoded NTLM type-2 message. The message
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239 | * is first decoded from a base64 string into a raw NTLM message and checked
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240 | * for validity before the appropriate data for creating a type-3 message is
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241 | * written to the given NTLM data structure.
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242 | *
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243 | * Parameters:
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244 | *
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245 | * data [in] - The session handle.
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246 | * type2msg [in] - The base64 encoded type-2 message.
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247 | * ntlm [in/out] - The NTLM data struct being used and modified.
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248 | *
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249 | * Returns CURLE_OK on success.
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250 | */
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251 | CURLcode Curl_auth_decode_ntlm_type2_message(struct Curl_easy *data,
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252 | const char *type2msg,
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253 | struct ntlmdata *ntlm)
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254 | {
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255 | static const char type2_marker[] = { 0x02, 0x00, 0x00, 0x00 };
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256 |
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257 | /* NTLM type-2 message structure:
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258 |
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259 | Index Description Content
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260 | 0 NTLMSSP Signature Null-terminated ASCII "NTLMSSP"
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261 | (0x4e544c4d53535000)
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262 | 8 NTLM Message Type long (0x02000000)
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263 | 12 Target Name security buffer
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264 | 20 Flags long
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265 | 24 Challenge 8 bytes
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266 | (32) Context 8 bytes (two consecutive longs) (*)
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267 | (40) Target Information security buffer (*)
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268 | (48) OS Version Structure 8 bytes (*)
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269 | 32 (48) (56) Start of data block (*)
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270 | (*) -> Optional
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271 | */
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272 |
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273 | CURLcode result = CURLE_OK;
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274 | unsigned char *type2 = NULL;
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275 | size_t type2_len = 0;
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276 |
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277 | #if defined(NTLM_NEEDS_NSS_INIT)
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278 | /* Make sure the crypto backend is initialized */
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279 | result = Curl_nss_force_init(data);
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280 | if(result)
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281 | return result;
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282 | #elif defined(CURL_DISABLE_VERBOSE_STRINGS)
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283 | (void)data;
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284 | #endif
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285 |
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286 | /* Decode the base-64 encoded type-2 message */
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287 | if(strlen(type2msg) && *type2msg != '=') {
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288 | result = Curl_base64_decode(type2msg, &type2, &type2_len);
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289 | if(result)
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290 | return result;
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291 | }
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292 |
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293 | /* Ensure we have a valid type-2 message */
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294 | if(!type2) {
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295 | infof(data, "NTLM handshake failure (empty type-2 message)\n");
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296 | return CURLE_BAD_CONTENT_ENCODING;
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297 | }
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298 |
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299 | ntlm->flags = 0;
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300 |
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301 | if((type2_len < 32) ||
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302 | (memcmp(type2, NTLMSSP_SIGNATURE, 8) != 0) ||
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303 | (memcmp(type2 + 8, type2_marker, sizeof(type2_marker)) != 0)) {
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304 | /* This was not a good enough type-2 message */
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305 | free(type2);
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306 | infof(data, "NTLM handshake failure (bad type-2 message)\n");
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307 | return CURLE_BAD_CONTENT_ENCODING;
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308 | }
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309 |
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310 | ntlm->flags = Curl_read32_le(&type2[20]);
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311 | memcpy(ntlm->nonce, &type2[24], 8);
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312 |
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313 | if(ntlm->flags & NTLMFLAG_NEGOTIATE_TARGET_INFO) {
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314 | result = ntlm_decode_type2_target(data, type2, type2_len, ntlm);
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315 | if(result) {
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316 | free(type2);
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317 | infof(data, "NTLM handshake failure (bad type-2 message)\n");
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318 | return result;
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319 | }
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320 | }
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321 |
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322 | DEBUG_OUT({
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323 | fprintf(stderr, "**** TYPE2 header flags=0x%08.8lx ", ntlm->flags);
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324 | ntlm_print_flags(stderr, ntlm->flags);
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325 | fprintf(stderr, "\n nonce=");
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326 | ntlm_print_hex(stderr, (char *)ntlm->nonce, 8);
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327 | fprintf(stderr, "\n****\n");
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328 | fprintf(stderr, "**** Header %s\n ", header);
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329 | });
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330 |
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331 | free(type2);
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332 |
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333 | return result;
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334 | }
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335 |
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336 | /* copy the source to the destination and fill in zeroes in every
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337 | other destination byte! */
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338 | static void unicodecpy(unsigned char *dest, const char *src, size_t length)
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339 | {
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340 | size_t i;
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341 | for(i = 0; i < length; i++) {
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342 | dest[2 * i] = (unsigned char)src[i];
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343 | dest[2 * i + 1] = '\0';
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344 | }
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345 | }
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346 |
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347 | /*
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348 | * Curl_auth_create_ntlm_type1_message()
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349 | *
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350 | * This is used to generate an already encoded NTLM type-1 message ready for
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351 | * sending to the recipient using the appropriate compile time crypto API.
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352 | *
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353 | * Parameters:
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354 | *
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355 | * data [in] - The session handle.
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356 | * userp [in] - The user name in the format User or Domain\User.
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357 | * passdwp [in] - The user's password.
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358 | * ntlm [in/out] - The NTLM data struct being used and modified.
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359 | * outptr [in/out] - The address where a pointer to newly allocated memory
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360 | * holding the result will be stored upon completion.
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361 | * outlen [out] - The length of the output message.
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362 | *
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363 | * Returns CURLE_OK on success.
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364 | */
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365 | CURLcode Curl_auth_create_ntlm_type1_message(struct Curl_easy *data,
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366 | const char *userp,
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367 | const char *passwdp,
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368 | struct ntlmdata *ntlm,
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369 | char **outptr, size_t *outlen)
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370 | {
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371 | /* NTLM type-1 message structure:
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372 |
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373 | Index Description Content
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374 | 0 NTLMSSP Signature Null-terminated ASCII "NTLMSSP"
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375 | (0x4e544c4d53535000)
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376 | 8 NTLM Message Type long (0x01000000)
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377 | 12 Flags long
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378 | (16) Supplied Domain security buffer (*)
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379 | (24) Supplied Workstation security buffer (*)
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380 | (32) OS Version Structure 8 bytes (*)
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381 | (32) (40) Start of data block (*)
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382 | (*) -> Optional
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383 | */
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384 |
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385 | size_t size;
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386 |
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387 | unsigned char ntlmbuf[NTLM_BUFSIZE];
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388 | const char *host = ""; /* empty */
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389 | const char *domain = ""; /* empty */
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390 | size_t hostlen = 0;
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391 | size_t domlen = 0;
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392 | size_t hostoff = 0;
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393 | size_t domoff = hostoff + hostlen; /* This is 0: remember that host and
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394 | domain are empty */
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395 | (void)userp;
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396 | (void)passwdp;
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397 |
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398 | /* Clean up any former leftovers and initialise to defaults */
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399 | Curl_auth_ntlm_cleanup(ntlm);
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400 |
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401 | #if defined(USE_NTRESPONSES) && defined(USE_NTLM2SESSION)
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402 | #define NTLM2FLAG NTLMFLAG_NEGOTIATE_NTLM2_KEY
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403 | #else
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404 | #define NTLM2FLAG 0
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405 | #endif
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406 | snprintf((char *)ntlmbuf, NTLM_BUFSIZE,
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407 | NTLMSSP_SIGNATURE "%c"
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408 | "\x01%c%c%c" /* 32-bit type = 1 */
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409 | "%c%c%c%c" /* 32-bit NTLM flag field */
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410 | "%c%c" /* domain length */
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411 | "%c%c" /* domain allocated space */
|
---|
412 | "%c%c" /* domain name offset */
|
---|
413 | "%c%c" /* 2 zeroes */
|
---|
414 | "%c%c" /* host length */
|
---|
415 | "%c%c" /* host allocated space */
|
---|
416 | "%c%c" /* host name offset */
|
---|
417 | "%c%c" /* 2 zeroes */
|
---|
418 | "%s" /* host name */
|
---|
419 | "%s", /* domain string */
|
---|
420 | 0, /* trailing zero */
|
---|
421 | 0, 0, 0, /* part of type-1 long */
|
---|
422 |
|
---|
423 | LONGQUARTET(NTLMFLAG_NEGOTIATE_OEM |
|
---|
424 | NTLMFLAG_REQUEST_TARGET |
|
---|
425 | NTLMFLAG_NEGOTIATE_NTLM_KEY |
|
---|
426 | NTLM2FLAG |
|
---|
427 | NTLMFLAG_NEGOTIATE_ALWAYS_SIGN),
|
---|
428 | SHORTPAIR(domlen),
|
---|
429 | SHORTPAIR(domlen),
|
---|
430 | SHORTPAIR(domoff),
|
---|
431 | 0, 0,
|
---|
432 | SHORTPAIR(hostlen),
|
---|
433 | SHORTPAIR(hostlen),
|
---|
434 | SHORTPAIR(hostoff),
|
---|
435 | 0, 0,
|
---|
436 | host, /* this is empty */
|
---|
437 | domain /* this is empty */);
|
---|
438 |
|
---|
439 | /* Initial packet length */
|
---|
440 | size = 32 + hostlen + domlen;
|
---|
441 |
|
---|
442 | DEBUG_OUT({
|
---|
443 | fprintf(stderr, "* TYPE1 header flags=0x%02.2x%02.2x%02.2x%02.2x "
|
---|
444 | "0x%08.8x ",
|
---|
445 | LONGQUARTET(NTLMFLAG_NEGOTIATE_OEM |
|
---|
446 | NTLMFLAG_REQUEST_TARGET |
|
---|
447 | NTLMFLAG_NEGOTIATE_NTLM_KEY |
|
---|
448 | NTLM2FLAG |
|
---|
449 | NTLMFLAG_NEGOTIATE_ALWAYS_SIGN),
|
---|
450 | NTLMFLAG_NEGOTIATE_OEM |
|
---|
451 | NTLMFLAG_REQUEST_TARGET |
|
---|
452 | NTLMFLAG_NEGOTIATE_NTLM_KEY |
|
---|
453 | NTLM2FLAG |
|
---|
454 | NTLMFLAG_NEGOTIATE_ALWAYS_SIGN);
|
---|
455 | ntlm_print_flags(stderr,
|
---|
456 | NTLMFLAG_NEGOTIATE_OEM |
|
---|
457 | NTLMFLAG_REQUEST_TARGET |
|
---|
458 | NTLMFLAG_NEGOTIATE_NTLM_KEY |
|
---|
459 | NTLM2FLAG |
|
---|
460 | NTLMFLAG_NEGOTIATE_ALWAYS_SIGN);
|
---|
461 | fprintf(stderr, "\n****\n");
|
---|
462 | });
|
---|
463 |
|
---|
464 | /* Return with binary blob encoded into base64 */
|
---|
465 | return Curl_base64_encode(data, (char *)ntlmbuf, size, outptr, outlen);
|
---|
466 | }
|
---|
467 |
|
---|
468 | /*
|
---|
469 | * Curl_auth_create_ntlm_type3_message()
|
---|
470 | *
|
---|
471 | * This is used to generate an already encoded NTLM type-3 message ready for
|
---|
472 | * sending to the recipient using the appropriate compile time crypto API.
|
---|
473 | *
|
---|
474 | * Parameters:
|
---|
475 | *
|
---|
476 | * data [in] - The session handle.
|
---|
477 | * userp [in] - The user name in the format User or Domain\User.
|
---|
478 | * passdwp [in] - The user's password.
|
---|
479 | * ntlm [in/out] - The NTLM data struct being used and modified.
|
---|
480 | * outptr [in/out] - The address where a pointer to newly allocated memory
|
---|
481 | * holding the result will be stored upon completion.
|
---|
482 | * outlen [out] - The length of the output message.
|
---|
483 | *
|
---|
484 | * Returns CURLE_OK on success.
|
---|
485 | */
|
---|
486 | CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
|
---|
487 | const char *userp,
|
---|
488 | const char *passwdp,
|
---|
489 | struct ntlmdata *ntlm,
|
---|
490 | char **outptr, size_t *outlen)
|
---|
491 |
|
---|
492 | {
|
---|
493 | /* NTLM type-3 message structure:
|
---|
494 |
|
---|
495 | Index Description Content
|
---|
496 | 0 NTLMSSP Signature Null-terminated ASCII "NTLMSSP"
|
---|
497 | (0x4e544c4d53535000)
|
---|
498 | 8 NTLM Message Type long (0x03000000)
|
---|
499 | 12 LM/LMv2 Response security buffer
|
---|
500 | 20 NTLM/NTLMv2 Response security buffer
|
---|
501 | 28 Target Name security buffer
|
---|
502 | 36 User Name security buffer
|
---|
503 | 44 Workstation Name security buffer
|
---|
504 | (52) Session Key security buffer (*)
|
---|
505 | (60) Flags long (*)
|
---|
506 | (64) OS Version Structure 8 bytes (*)
|
---|
507 | 52 (64) (72) Start of data block
|
---|
508 | (*) -> Optional
|
---|
509 | */
|
---|
510 |
|
---|
511 | CURLcode result = CURLE_OK;
|
---|
512 | size_t size;
|
---|
513 | unsigned char ntlmbuf[NTLM_BUFSIZE];
|
---|
514 | int lmrespoff;
|
---|
515 | unsigned char lmresp[24]; /* fixed-size */
|
---|
516 | #ifdef USE_NTRESPONSES
|
---|
517 | int ntrespoff;
|
---|
518 | unsigned int ntresplen = 24;
|
---|
519 | unsigned char ntresp[24]; /* fixed-size */
|
---|
520 | unsigned char *ptr_ntresp = &ntresp[0];
|
---|
521 | unsigned char *ntlmv2resp = NULL;
|
---|
522 | #endif
|
---|
523 | bool unicode = (ntlm->flags & NTLMFLAG_NEGOTIATE_UNICODE) ? TRUE : FALSE;
|
---|
524 | char host[HOSTNAME_MAX + 1] = "";
|
---|
525 | const char *user;
|
---|
526 | const char *domain = "";
|
---|
527 | size_t hostoff = 0;
|
---|
528 | size_t useroff = 0;
|
---|
529 | size_t domoff = 0;
|
---|
530 | size_t hostlen = 0;
|
---|
531 | size_t userlen = 0;
|
---|
532 | size_t domlen = 0;
|
---|
533 |
|
---|
534 | user = strchr(userp, '\\');
|
---|
535 | if(!user)
|
---|
536 | user = strchr(userp, '/');
|
---|
537 |
|
---|
538 | if(user) {
|
---|
539 | domain = userp;
|
---|
540 | domlen = (user - domain);
|
---|
541 | user++;
|
---|
542 | }
|
---|
543 | else
|
---|
544 | user = userp;
|
---|
545 |
|
---|
546 | userlen = strlen(user);
|
---|
547 |
|
---|
548 | /* Get the machine's un-qualified host name as NTLM doesn't like the fully
|
---|
549 | qualified domain name */
|
---|
550 | if(Curl_gethostname(host, sizeof(host))) {
|
---|
551 | infof(data, "gethostname() failed, continuing without!\n");
|
---|
552 | hostlen = 0;
|
---|
553 | }
|
---|
554 | else {
|
---|
555 | hostlen = strlen(host);
|
---|
556 | }
|
---|
557 |
|
---|
558 | #if defined(USE_NTRESPONSES) && defined(USE_NTLM_V2)
|
---|
559 | if(ntlm->target_info_len) {
|
---|
560 | unsigned char ntbuffer[0x18];
|
---|
561 | unsigned char entropy[8];
|
---|
562 | unsigned char ntlmv2hash[0x18];
|
---|
563 |
|
---|
564 | result = Curl_rand(data, entropy, 8);
|
---|
565 | if(result)
|
---|
566 | return result;
|
---|
567 |
|
---|
568 | result = Curl_ntlm_core_mk_nt_hash(data, passwdp, ntbuffer);
|
---|
569 | if(result)
|
---|
570 | return result;
|
---|
571 |
|
---|
572 | result = Curl_ntlm_core_mk_ntlmv2_hash(user, userlen, domain, domlen,
|
---|
573 | ntbuffer, ntlmv2hash);
|
---|
574 | if(result)
|
---|
575 | return result;
|
---|
576 |
|
---|
577 | /* LMv2 response */
|
---|
578 | result = Curl_ntlm_core_mk_lmv2_resp(ntlmv2hash, entropy,
|
---|
579 | &ntlm->nonce[0], lmresp);
|
---|
580 | if(result)
|
---|
581 | return result;
|
---|
582 |
|
---|
583 | /* NTLMv2 response */
|
---|
584 | result = Curl_ntlm_core_mk_ntlmv2_resp(ntlmv2hash, entropy,
|
---|
585 | ntlm, &ntlmv2resp, &ntresplen);
|
---|
586 | if(result)
|
---|
587 | return result;
|
---|
588 |
|
---|
589 | ptr_ntresp = ntlmv2resp;
|
---|
590 | }
|
---|
591 | else
|
---|
592 | #endif
|
---|
593 |
|
---|
594 | #if defined(USE_NTRESPONSES) && defined(USE_NTLM2SESSION)
|
---|
595 | /* We don't support NTLM2 if we don't have USE_NTRESPONSES */
|
---|
596 | if(ntlm->flags & NTLMFLAG_NEGOTIATE_NTLM2_KEY) {
|
---|
597 | unsigned char ntbuffer[0x18];
|
---|
598 | unsigned char tmp[0x18];
|
---|
599 | unsigned char md5sum[MD5_DIGEST_LENGTH];
|
---|
600 | unsigned char entropy[8];
|
---|
601 |
|
---|
602 | /* Need to create 8 bytes random data */
|
---|
603 | result = Curl_rand(data, entropy, 8);
|
---|
604 | if(result)
|
---|
605 | return result;
|
---|
606 |
|
---|
607 | /* 8 bytes random data as challenge in lmresp */
|
---|
608 | memcpy(lmresp, entropy, 8);
|
---|
609 |
|
---|
610 | /* Pad with zeros */
|
---|
611 | memset(lmresp + 8, 0, 0x10);
|
---|
612 |
|
---|
613 | /* Fill tmp with challenge(nonce?) + entropy */
|
---|
614 | memcpy(tmp, &ntlm->nonce[0], 8);
|
---|
615 | memcpy(tmp + 8, entropy, 8);
|
---|
616 |
|
---|
617 | result = Curl_ssl_md5sum(tmp, 16, md5sum, MD5_DIGEST_LENGTH);
|
---|
618 | if(!result)
|
---|
619 | /* We shall only use the first 8 bytes of md5sum, but the des code in
|
---|
620 | Curl_ntlm_core_lm_resp only encrypt the first 8 bytes */
|
---|
621 | result = Curl_ntlm_core_mk_nt_hash(data, passwdp, ntbuffer);
|
---|
622 | if(result)
|
---|
623 | return result;
|
---|
624 |
|
---|
625 | Curl_ntlm_core_lm_resp(ntbuffer, md5sum, ntresp);
|
---|
626 |
|
---|
627 | /* End of NTLM2 Session code */
|
---|
628 |
|
---|
629 | }
|
---|
630 | else
|
---|
631 | #endif
|
---|
632 | {
|
---|
633 |
|
---|
634 | #ifdef USE_NTRESPONSES
|
---|
635 | unsigned char ntbuffer[0x18];
|
---|
636 | #endif
|
---|
637 | unsigned char lmbuffer[0x18];
|
---|
638 |
|
---|
639 | #ifdef USE_NTRESPONSES
|
---|
640 | result = Curl_ntlm_core_mk_nt_hash(data, passwdp, ntbuffer);
|
---|
641 | if(result)
|
---|
642 | return result;
|
---|
643 |
|
---|
644 | Curl_ntlm_core_lm_resp(ntbuffer, &ntlm->nonce[0], ntresp);
|
---|
645 | #endif
|
---|
646 |
|
---|
647 | result = Curl_ntlm_core_mk_lm_hash(data, passwdp, lmbuffer);
|
---|
648 | if(result)
|
---|
649 | return result;
|
---|
650 |
|
---|
651 | Curl_ntlm_core_lm_resp(lmbuffer, &ntlm->nonce[0], lmresp);
|
---|
652 |
|
---|
653 | /* A safer but less compatible alternative is:
|
---|
654 | * Curl_ntlm_core_lm_resp(ntbuffer, &ntlm->nonce[0], lmresp);
|
---|
655 | * See https://davenport.sourceforge.io/ntlm.html#ntlmVersion2 */
|
---|
656 | }
|
---|
657 |
|
---|
658 | if(unicode) {
|
---|
659 | domlen = domlen * 2;
|
---|
660 | userlen = userlen * 2;
|
---|
661 | hostlen = hostlen * 2;
|
---|
662 | }
|
---|
663 |
|
---|
664 | lmrespoff = 64; /* size of the message header */
|
---|
665 | #ifdef USE_NTRESPONSES
|
---|
666 | ntrespoff = lmrespoff + 0x18;
|
---|
667 | domoff = ntrespoff + ntresplen;
|
---|
668 | #else
|
---|
669 | domoff = lmrespoff + 0x18;
|
---|
670 | #endif
|
---|
671 | useroff = domoff + domlen;
|
---|
672 | hostoff = useroff + userlen;
|
---|
673 |
|
---|
674 | /* Create the big type-3 message binary blob */
|
---|
675 | size = snprintf((char *)ntlmbuf, NTLM_BUFSIZE,
|
---|
676 | NTLMSSP_SIGNATURE "%c"
|
---|
677 | "\x03%c%c%c" /* 32-bit type = 3 */
|
---|
678 |
|
---|
679 | "%c%c" /* LanManager length */
|
---|
680 | "%c%c" /* LanManager allocated space */
|
---|
681 | "%c%c" /* LanManager offset */
|
---|
682 | "%c%c" /* 2 zeroes */
|
---|
683 |
|
---|
684 | "%c%c" /* NT-response length */
|
---|
685 | "%c%c" /* NT-response allocated space */
|
---|
686 | "%c%c" /* NT-response offset */
|
---|
687 | "%c%c" /* 2 zeroes */
|
---|
688 |
|
---|
689 | "%c%c" /* domain length */
|
---|
690 | "%c%c" /* domain allocated space */
|
---|
691 | "%c%c" /* domain name offset */
|
---|
692 | "%c%c" /* 2 zeroes */
|
---|
693 |
|
---|
694 | "%c%c" /* user length */
|
---|
695 | "%c%c" /* user allocated space */
|
---|
696 | "%c%c" /* user offset */
|
---|
697 | "%c%c" /* 2 zeroes */
|
---|
698 |
|
---|
699 | "%c%c" /* host length */
|
---|
700 | "%c%c" /* host allocated space */
|
---|
701 | "%c%c" /* host offset */
|
---|
702 | "%c%c" /* 2 zeroes */
|
---|
703 |
|
---|
704 | "%c%c" /* session key length (unknown purpose) */
|
---|
705 | "%c%c" /* session key allocated space (unknown purpose) */
|
---|
706 | "%c%c" /* session key offset (unknown purpose) */
|
---|
707 | "%c%c" /* 2 zeroes */
|
---|
708 |
|
---|
709 | "%c%c%c%c", /* flags */
|
---|
710 |
|
---|
711 | /* domain string */
|
---|
712 | /* user string */
|
---|
713 | /* host string */
|
---|
714 | /* LanManager response */
|
---|
715 | /* NT response */
|
---|
716 |
|
---|
717 | 0, /* zero termination */
|
---|
718 | 0, 0, 0, /* type-3 long, the 24 upper bits */
|
---|
719 |
|
---|
720 | SHORTPAIR(0x18), /* LanManager response length, twice */
|
---|
721 | SHORTPAIR(0x18),
|
---|
722 | SHORTPAIR(lmrespoff),
|
---|
723 | 0x0, 0x0,
|
---|
724 |
|
---|
725 | #ifdef USE_NTRESPONSES
|
---|
726 | SHORTPAIR(ntresplen), /* NT-response length, twice */
|
---|
727 | SHORTPAIR(ntresplen),
|
---|
728 | SHORTPAIR(ntrespoff),
|
---|
729 | 0x0, 0x0,
|
---|
730 | #else
|
---|
731 | 0x0, 0x0,
|
---|
732 | 0x0, 0x0,
|
---|
733 | 0x0, 0x0,
|
---|
734 | 0x0, 0x0,
|
---|
735 | #endif
|
---|
736 | SHORTPAIR(domlen),
|
---|
737 | SHORTPAIR(domlen),
|
---|
738 | SHORTPAIR(domoff),
|
---|
739 | 0x0, 0x0,
|
---|
740 |
|
---|
741 | SHORTPAIR(userlen),
|
---|
742 | SHORTPAIR(userlen),
|
---|
743 | SHORTPAIR(useroff),
|
---|
744 | 0x0, 0x0,
|
---|
745 |
|
---|
746 | SHORTPAIR(hostlen),
|
---|
747 | SHORTPAIR(hostlen),
|
---|
748 | SHORTPAIR(hostoff),
|
---|
749 | 0x0, 0x0,
|
---|
750 |
|
---|
751 | 0x0, 0x0,
|
---|
752 | 0x0, 0x0,
|
---|
753 | 0x0, 0x0,
|
---|
754 | 0x0, 0x0,
|
---|
755 |
|
---|
756 | LONGQUARTET(ntlm->flags));
|
---|
757 |
|
---|
758 | DEBUGASSERT(size == 64);
|
---|
759 | DEBUGASSERT(size == (size_t)lmrespoff);
|
---|
760 |
|
---|
761 | /* We append the binary hashes */
|
---|
762 | if(size < (NTLM_BUFSIZE - 0x18)) {
|
---|
763 | memcpy(&ntlmbuf[size], lmresp, 0x18);
|
---|
764 | size += 0x18;
|
---|
765 | }
|
---|
766 |
|
---|
767 | DEBUG_OUT({
|
---|
768 | fprintf(stderr, "**** TYPE3 header lmresp=");
|
---|
769 | ntlm_print_hex(stderr, (char *)&ntlmbuf[lmrespoff], 0x18);
|
---|
770 | });
|
---|
771 |
|
---|
772 | #ifdef USE_NTRESPONSES
|
---|
773 | if(size < (NTLM_BUFSIZE - ntresplen)) {
|
---|
774 | DEBUGASSERT(size == (size_t)ntrespoff);
|
---|
775 | memcpy(&ntlmbuf[size], ptr_ntresp, ntresplen);
|
---|
776 | size += ntresplen;
|
---|
777 | }
|
---|
778 |
|
---|
779 | DEBUG_OUT({
|
---|
780 | fprintf(stderr, "\n ntresp=");
|
---|
781 | ntlm_print_hex(stderr, (char *)&ntlmbuf[ntrespoff], ntresplen);
|
---|
782 | });
|
---|
783 |
|
---|
784 | free(ntlmv2resp);/* Free the dynamic buffer allocated for NTLMv2 */
|
---|
785 |
|
---|
786 | #endif
|
---|
787 |
|
---|
788 | DEBUG_OUT({
|
---|
789 | fprintf(stderr, "\n flags=0x%02.2x%02.2x%02.2x%02.2x 0x%08.8x ",
|
---|
790 | LONGQUARTET(ntlm->flags), ntlm->flags);
|
---|
791 | ntlm_print_flags(stderr, ntlm->flags);
|
---|
792 | fprintf(stderr, "\n****\n");
|
---|
793 | });
|
---|
794 |
|
---|
795 | /* Make sure that the domain, user and host strings fit in the
|
---|
796 | buffer before we copy them there. */
|
---|
797 | if(size + userlen + domlen + hostlen >= NTLM_BUFSIZE) {
|
---|
798 | failf(data, "user + domain + host name too big");
|
---|
799 | return CURLE_OUT_OF_MEMORY;
|
---|
800 | }
|
---|
801 |
|
---|
802 | DEBUGASSERT(size == domoff);
|
---|
803 | if(unicode)
|
---|
804 | unicodecpy(&ntlmbuf[size], domain, domlen / 2);
|
---|
805 | else
|
---|
806 | memcpy(&ntlmbuf[size], domain, domlen);
|
---|
807 |
|
---|
808 | size += domlen;
|
---|
809 |
|
---|
810 | DEBUGASSERT(size == useroff);
|
---|
811 | if(unicode)
|
---|
812 | unicodecpy(&ntlmbuf[size], user, userlen / 2);
|
---|
813 | else
|
---|
814 | memcpy(&ntlmbuf[size], user, userlen);
|
---|
815 |
|
---|
816 | size += userlen;
|
---|
817 |
|
---|
818 | DEBUGASSERT(size == hostoff);
|
---|
819 | if(unicode)
|
---|
820 | unicodecpy(&ntlmbuf[size], host, hostlen / 2);
|
---|
821 | else
|
---|
822 | memcpy(&ntlmbuf[size], host, hostlen);
|
---|
823 |
|
---|
824 | size += hostlen;
|
---|
825 |
|
---|
826 | /* Convert domain, user, and host to ASCII but leave the rest as-is */
|
---|
827 | result = Curl_convert_to_network(data, (char *)&ntlmbuf[domoff],
|
---|
828 | size - domoff);
|
---|
829 | if(result)
|
---|
830 | return CURLE_CONV_FAILED;
|
---|
831 |
|
---|
832 | /* Return with binary blob encoded into base64 */
|
---|
833 | result = Curl_base64_encode(data, (char *)ntlmbuf, size, outptr, outlen);
|
---|
834 |
|
---|
835 | Curl_auth_ntlm_cleanup(ntlm);
|
---|
836 |
|
---|
837 | return result;
|
---|
838 | }
|
---|
839 |
|
---|
840 | /*
|
---|
841 | * Curl_auth_ntlm_cleanup()
|
---|
842 | *
|
---|
843 | * This is used to clean up the NTLM specific data.
|
---|
844 | *
|
---|
845 | * Parameters:
|
---|
846 | *
|
---|
847 | * ntlm [in/out] - The NTLM data struct being cleaned up.
|
---|
848 | *
|
---|
849 | */
|
---|
850 | void Curl_auth_ntlm_cleanup(struct ntlmdata *ntlm)
|
---|
851 | {
|
---|
852 | /* Free the target info */
|
---|
853 | Curl_safefree(ntlm->target_info);
|
---|
854 |
|
---|
855 | /* Reset any variables */
|
---|
856 | ntlm->target_info_len = 0;
|
---|
857 | }
|
---|
858 |
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859 | #endif /* USE_NTLM && !USE_WINDOWS_SSPI */
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