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) 2012 - 2016, Marc Hoersken, <info@marc-hoersken.de>
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9 | * Copyright (C) 2012, Mark Salisbury, <mark.salisbury@hp.com>
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10 | * Copyright (C) 2012 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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11 | *
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12 | * This software is licensed as described in the file COPYING, which
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13 | * you should have received as part of this distribution. The terms
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14 | * are also available at https://curl.haxx.se/docs/copyright.html.
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15 | *
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16 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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17 | * copies of the Software, and permit persons to whom the Software is
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18 | * furnished to do so, under the terms of the COPYING file.
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19 | *
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20 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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21 | * KIND, either express or implied.
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22 | *
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23 | ***************************************************************************/
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24 |
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25 | /*
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26 | * Source file for all SChannel-specific code for the TLS/SSL layer. No code
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27 | * but vtls.c should ever call or use these functions.
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28 | *
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29 | */
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30 |
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31 | /*
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32 | * Based upon the PolarSSL implementation in polarssl.c and polarssl.h:
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33 | * Copyright (C) 2010, 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
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34 | *
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35 | * Based upon the CyaSSL implementation in cyassl.c and cyassl.h:
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36 | * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
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37 | *
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38 | * Thanks for code and inspiration!
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39 | */
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40 |
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41 | #include "curl_setup.h"
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42 |
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43 | #ifdef USE_SCHANNEL
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44 |
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45 | #ifndef USE_WINDOWS_SSPI
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46 | # error "Can't compile SCHANNEL support without SSPI."
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47 | #endif
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48 |
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49 | #include <schnlsp.h>
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50 | #include <schannel.h>
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51 | #include "curl_sspi.h"
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52 | #include "schannel.h"
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53 | #include "vtls.h"
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54 | #include "sendf.h"
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55 | #include "connect.h" /* for the connect timeout */
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56 | #include "strerror.h"
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57 | #include "select.h" /* for the socket readyness */
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58 | #include "inet_pton.h" /* for IP addr SNI check */
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59 | #include "curl_multibyte.h"
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60 | #include "warnless.h"
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61 | #include "x509asn1.h"
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62 | #include "curl_printf.h"
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63 | #include "system_win32.h"
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64 | #include "hostcheck.h"
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65 |
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66 | /* The last #include file should be: */
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67 | #include "curl_memory.h"
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68 | #include "memdebug.h"
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69 |
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70 | /* ALPN requires version 8.1 of the Windows SDK, which was
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71 | shipped with Visual Studio 2013, aka _MSC_VER 1800:
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72 |
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73 | https://technet.microsoft.com/en-us/library/hh831771%28v=ws.11%29.aspx
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74 | */
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75 | #if defined(_MSC_VER) && (_MSC_VER >= 1800) && !defined(_USING_V110_SDK71_)
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76 | # define HAS_ALPN 1
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77 | #endif
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78 |
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79 | #ifndef UNISP_NAME_A
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80 | #define UNISP_NAME_A "Microsoft Unified Security Protocol Provider"
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81 | #endif
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82 |
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83 | #ifndef UNISP_NAME_W
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84 | #define UNISP_NAME_W L"Microsoft Unified Security Protocol Provider"
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85 | #endif
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86 |
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87 | #ifndef UNISP_NAME
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88 | #ifdef UNICODE
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89 | #define UNISP_NAME UNISP_NAME_W
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90 | #else
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91 | #define UNISP_NAME UNISP_NAME_A
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92 | #endif
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93 | #endif
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94 |
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95 | #ifndef SP_PROT_SSL2_CLIENT
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96 | #define SP_PROT_SSL2_CLIENT 0x00000008
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97 | #endif
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98 |
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99 | #ifndef SP_PROT_SSL3_CLIENT
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100 | #define SP_PROT_SSL3_CLIENT 0x00000008
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101 | #endif
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102 |
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103 | #ifndef SP_PROT_TLS1_CLIENT
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104 | #define SP_PROT_TLS1_CLIENT 0x00000080
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105 | #endif
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106 |
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107 | #ifndef SP_PROT_TLS1_0_CLIENT
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108 | #define SP_PROT_TLS1_0_CLIENT SP_PROT_TLS1_CLIENT
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109 | #endif
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110 |
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111 | #ifndef SP_PROT_TLS1_1_CLIENT
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112 | #define SP_PROT_TLS1_1_CLIENT 0x00000200
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113 | #endif
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114 |
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115 | #ifndef SP_PROT_TLS1_2_CLIENT
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116 | #define SP_PROT_TLS1_2_CLIENT 0x00000800
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117 | #endif
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118 |
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119 | #ifndef SECBUFFER_ALERT
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120 | #define SECBUFFER_ALERT 17
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121 | #endif
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122 |
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123 | /* Both schannel buffer sizes must be > 0 */
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124 | #define CURL_SCHANNEL_BUFFER_INIT_SIZE 4096
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125 | #define CURL_SCHANNEL_BUFFER_FREE_SIZE 1024
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126 |
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127 | /* Uncomment to force verbose output
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128 | * #define infof(x, y, ...) printf(y, __VA_ARGS__)
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129 | * #define failf(x, y, ...) printf(y, __VA_ARGS__)
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130 | */
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131 |
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132 | /* Structs to store Schannel handles */
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133 | struct curl_schannel_cred {
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134 | CredHandle cred_handle;
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135 | TimeStamp time_stamp;
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136 | int refcount;
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137 | };
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138 |
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139 | struct curl_schannel_ctxt {
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140 | CtxtHandle ctxt_handle;
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141 | TimeStamp time_stamp;
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142 | };
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143 |
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144 | struct ssl_backend_data {
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145 | struct curl_schannel_cred *cred;
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146 | struct curl_schannel_ctxt *ctxt;
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147 | SecPkgContext_StreamSizes stream_sizes;
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148 | size_t encdata_length, decdata_length;
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149 | size_t encdata_offset, decdata_offset;
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150 | unsigned char *encdata_buffer, *decdata_buffer;
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151 | /* encdata_is_incomplete: if encdata contains only a partial record that
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152 | can't be decrypted without another Curl_read_plain (that is, status is
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153 | SEC_E_INCOMPLETE_MESSAGE) then set this true. after Curl_read_plain writes
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154 | more bytes into encdata then set this back to false. */
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155 | bool encdata_is_incomplete;
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156 | unsigned long req_flags, ret_flags;
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157 | CURLcode recv_unrecoverable_err; /* schannel_recv had an unrecoverable err */
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158 | bool recv_sspi_close_notify; /* true if connection closed by close_notify */
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159 | bool recv_connection_closed; /* true if connection closed, regardless how */
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160 | bool use_alpn; /* true if ALPN is used for this connection */
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161 | };
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162 |
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163 | #define BACKEND connssl->backend
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164 |
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165 | static Curl_recv schannel_recv;
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166 | static Curl_send schannel_send;
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167 |
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168 | #ifdef _WIN32_WCE
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169 | static CURLcode verify_certificate(struct connectdata *conn, int sockindex);
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170 | #endif
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171 |
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172 | static void InitSecBuffer(SecBuffer *buffer, unsigned long BufType,
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173 | void *BufDataPtr, unsigned long BufByteSize)
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174 | {
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175 | buffer->cbBuffer = BufByteSize;
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176 | buffer->BufferType = BufType;
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177 | buffer->pvBuffer = BufDataPtr;
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178 | }
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179 |
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180 | static void InitSecBufferDesc(SecBufferDesc *desc, SecBuffer *BufArr,
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181 | unsigned long NumArrElem)
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182 | {
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183 | desc->ulVersion = SECBUFFER_VERSION;
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184 | desc->pBuffers = BufArr;
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185 | desc->cBuffers = NumArrElem;
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186 | }
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187 |
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188 | static CURLcode
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189 | set_ssl_version_min_max(SCHANNEL_CRED *schannel_cred, struct connectdata *conn)
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190 | {
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191 | struct Curl_easy *data = conn->data;
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192 | long ssl_version = SSL_CONN_CONFIG(version);
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193 | long ssl_version_max = SSL_CONN_CONFIG(version_max);
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194 | long i = ssl_version;
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195 |
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196 | switch(ssl_version_max) {
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197 | case CURL_SSLVERSION_MAX_NONE:
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198 | ssl_version_max = ssl_version << 16;
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199 | break;
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200 | case CURL_SSLVERSION_MAX_DEFAULT:
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201 | ssl_version_max = CURL_SSLVERSION_MAX_TLSv1_2;
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202 | break;
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203 | }
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204 | for(; i <= (ssl_version_max >> 16); ++i) {
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205 | switch(i) {
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206 | case CURL_SSLVERSION_TLSv1_0:
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207 | schannel_cred->grbitEnabledProtocols |= SP_PROT_TLS1_0_CLIENT;
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208 | break;
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209 | case CURL_SSLVERSION_TLSv1_1:
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210 | schannel_cred->grbitEnabledProtocols |= SP_PROT_TLS1_1_CLIENT;
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211 | break;
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212 | case CURL_SSLVERSION_TLSv1_2:
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213 | schannel_cred->grbitEnabledProtocols |= SP_PROT_TLS1_2_CLIENT;
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214 | break;
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215 | case CURL_SSLVERSION_TLSv1_3:
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216 | failf(data, "Schannel: TLS 1.3 is not yet supported");
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217 | return CURLE_SSL_CONNECT_ERROR;
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218 | }
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219 | }
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220 | return CURLE_OK;
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221 | }
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222 |
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223 | static CURLcode
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224 | schannel_connect_step1(struct connectdata *conn, int sockindex)
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225 | {
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226 | ssize_t written = -1;
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227 | struct Curl_easy *data = conn->data;
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228 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
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229 | SecBuffer outbuf;
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230 | SecBufferDesc outbuf_desc;
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231 | SecBuffer inbuf;
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232 | SecBufferDesc inbuf_desc;
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233 | #ifdef HAS_ALPN
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234 | unsigned char alpn_buffer[128];
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235 | #endif
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236 | SCHANNEL_CRED schannel_cred;
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237 | SECURITY_STATUS sspi_status = SEC_E_OK;
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238 | struct curl_schannel_cred *old_cred = NULL;
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239 | struct in_addr addr;
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240 | #ifdef ENABLE_IPV6
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241 | struct in6_addr addr6;
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242 | #endif
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243 | TCHAR *host_name;
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244 | CURLcode result;
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245 | char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
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246 | conn->host.name;
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247 |
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248 | infof(data, "schannel: SSL/TLS connection with %s port %hu (step 1/3)\n",
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249 | hostname, conn->remote_port);
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250 |
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251 | if(Curl_verify_windows_version(5, 1, PLATFORM_WINNT,
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252 | VERSION_LESS_THAN_EQUAL)) {
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253 | /* SChannel in Windows XP (OS version 5.1) uses legacy handshakes and
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254 | algorithms that may not be supported by all servers. */
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255 | infof(data, "schannel: WinSSL version is old and may not be able to "
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256 | "connect to some servers due to lack of SNI, algorithms, etc.\n");
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257 | }
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258 |
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259 | #ifdef HAS_ALPN
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260 | /* ALPN is only supported on Windows 8.1 / Server 2012 R2 and above.
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261 | Also it doesn't seem to be supported for Wine, see curl bug #983. */
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262 | BACKEND->use_alpn = conn->bits.tls_enable_alpn &&
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263 | !GetProcAddress(GetModuleHandleA("ntdll"),
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264 | "wine_get_version") &&
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265 | Curl_verify_windows_version(6, 3, PLATFORM_WINNT,
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266 | VERSION_GREATER_THAN_EQUAL);
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267 | #else
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268 | BACKEND->use_alpn = false;
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269 | #endif
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270 |
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271 | BACKEND->cred = NULL;
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272 |
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273 | /* check for an existing re-usable credential handle */
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274 | if(SSL_SET_OPTION(primary.sessionid)) {
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275 | Curl_ssl_sessionid_lock(conn);
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276 | if(!Curl_ssl_getsessionid(conn, (void **)&old_cred, NULL, sockindex)) {
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277 | BACKEND->cred = old_cred;
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278 | infof(data, "schannel: re-using existing credential handle\n");
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279 |
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280 | /* increment the reference counter of the credential/session handle */
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281 | BACKEND->cred->refcount++;
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282 | infof(data, "schannel: incremented credential handle refcount = %d\n",
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283 | BACKEND->cred->refcount);
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284 | }
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285 | Curl_ssl_sessionid_unlock(conn);
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286 | }
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287 |
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288 | if(!BACKEND->cred) {
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289 | /* setup Schannel API options */
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290 | memset(&schannel_cred, 0, sizeof(schannel_cred));
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291 | schannel_cred.dwVersion = SCHANNEL_CRED_VERSION;
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292 |
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293 | if(conn->ssl_config.verifypeer) {
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294 | #ifdef _WIN32_WCE
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295 | /* certificate validation on CE doesn't seem to work right; we'll
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296 | do it following a more manual process. */
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297 | schannel_cred.dwFlags = SCH_CRED_MANUAL_CRED_VALIDATION |
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298 | SCH_CRED_IGNORE_NO_REVOCATION_CHECK |
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299 | SCH_CRED_IGNORE_REVOCATION_OFFLINE;
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300 | #else
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301 | schannel_cred.dwFlags = SCH_CRED_AUTO_CRED_VALIDATION;
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302 | /* TODO s/data->set.ssl.no_revoke/SSL_SET_OPTION(no_revoke)/g */
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303 | if(data->set.ssl.no_revoke)
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304 | schannel_cred.dwFlags |= SCH_CRED_IGNORE_NO_REVOCATION_CHECK |
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305 | SCH_CRED_IGNORE_REVOCATION_OFFLINE;
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306 | else
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307 | schannel_cred.dwFlags |= SCH_CRED_REVOCATION_CHECK_CHAIN;
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308 | #endif
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309 | if(data->set.ssl.no_revoke)
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310 | infof(data, "schannel: disabled server certificate revocation "
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311 | "checks\n");
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312 | else
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313 | infof(data, "schannel: checking server certificate revocation\n");
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314 | }
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315 | else {
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316 | schannel_cred.dwFlags = SCH_CRED_MANUAL_CRED_VALIDATION |
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317 | SCH_CRED_IGNORE_NO_REVOCATION_CHECK |
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318 | SCH_CRED_IGNORE_REVOCATION_OFFLINE;
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319 | infof(data, "schannel: disabled server certificate revocation checks\n");
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320 | }
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321 |
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322 | if(!conn->ssl_config.verifyhost) {
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323 | schannel_cred.dwFlags |= SCH_CRED_NO_SERVERNAME_CHECK;
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324 | infof(data, "schannel: verifyhost setting prevents Schannel from "
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325 | "comparing the supplied target name with the subject "
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326 | "names in server certificates.\n");
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327 | }
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328 |
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329 | switch(conn->ssl_config.version) {
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330 | case CURL_SSLVERSION_DEFAULT:
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331 | case CURL_SSLVERSION_TLSv1:
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332 | schannel_cred.grbitEnabledProtocols = SP_PROT_TLS1_0_CLIENT |
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333 | SP_PROT_TLS1_1_CLIENT |
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334 | SP_PROT_TLS1_2_CLIENT;
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335 | break;
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336 | case CURL_SSLVERSION_TLSv1_0:
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337 | case CURL_SSLVERSION_TLSv1_1:
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338 | case CURL_SSLVERSION_TLSv1_2:
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339 | case CURL_SSLVERSION_TLSv1_3:
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340 | {
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341 | result = set_ssl_version_min_max(&schannel_cred, conn);
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342 | if(result != CURLE_OK)
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343 | return result;
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344 | break;
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345 | }
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346 | case CURL_SSLVERSION_SSLv3:
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347 | schannel_cred.grbitEnabledProtocols = SP_PROT_SSL3_CLIENT;
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348 | break;
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349 | case CURL_SSLVERSION_SSLv2:
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350 | schannel_cred.grbitEnabledProtocols = SP_PROT_SSL2_CLIENT;
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351 | break;
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352 | default:
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353 | failf(data, "Unrecognized parameter passed via CURLOPT_SSLVERSION");
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354 | return CURLE_SSL_CONNECT_ERROR;
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355 | }
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356 |
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357 | /* allocate memory for the re-usable credential handle */
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358 | BACKEND->cred = (struct curl_schannel_cred *)
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359 | malloc(sizeof(struct curl_schannel_cred));
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360 | if(!BACKEND->cred) {
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361 | failf(data, "schannel: unable to allocate memory");
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362 | return CURLE_OUT_OF_MEMORY;
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363 | }
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364 | memset(BACKEND->cred, 0, sizeof(struct curl_schannel_cred));
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365 | BACKEND->cred->refcount = 1;
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366 |
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367 | /* https://msdn.microsoft.com/en-us/library/windows/desktop/aa374716.aspx
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368 | */
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369 | sspi_status =
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370 | s_pSecFn->AcquireCredentialsHandle(NULL, (TCHAR *)UNISP_NAME,
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371 | SECPKG_CRED_OUTBOUND, NULL,
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372 | &schannel_cred, NULL, NULL,
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373 | &BACKEND->cred->cred_handle,
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374 | &BACKEND->cred->time_stamp);
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375 |
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376 | if(sspi_status != SEC_E_OK) {
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377 | if(sspi_status == SEC_E_WRONG_PRINCIPAL)
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378 | failf(data, "schannel: SNI or certificate check failed: %s",
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379 | Curl_sspi_strerror(conn, sspi_status));
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380 | else
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381 | failf(data, "schannel: AcquireCredentialsHandle failed: %s",
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382 | Curl_sspi_strerror(conn, sspi_status));
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383 | Curl_safefree(BACKEND->cred);
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384 | return CURLE_SSL_CONNECT_ERROR;
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385 | }
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386 | }
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387 |
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388 | /* Warn if SNI is disabled due to use of an IP address */
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389 | if(Curl_inet_pton(AF_INET, hostname, &addr)
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390 | #ifdef ENABLE_IPV6
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391 | || Curl_inet_pton(AF_INET6, hostname, &addr6)
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392 | #endif
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393 | ) {
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394 | infof(data, "schannel: using IP address, SNI is not supported by OS.\n");
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395 | }
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396 |
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397 | #ifdef HAS_ALPN
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398 | if(BACKEND->use_alpn) {
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399 | int cur = 0;
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400 | int list_start_index = 0;
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401 | unsigned int *extension_len = NULL;
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402 | unsigned short* list_len = NULL;
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403 |
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404 | /* The first four bytes will be an unsigned int indicating number
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405 | of bytes of data in the rest of the the buffer. */
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406 | extension_len = (unsigned int *)(&alpn_buffer[cur]);
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407 | cur += sizeof(unsigned int);
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408 |
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409 | /* The next four bytes are an indicator that this buffer will contain
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410 | ALPN data, as opposed to NPN, for example. */
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411 | *(unsigned int *)&alpn_buffer[cur] =
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412 | SecApplicationProtocolNegotiationExt_ALPN;
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413 | cur += sizeof(unsigned int);
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414 |
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415 | /* The next two bytes will be an unsigned short indicating the number
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416 | of bytes used to list the preferred protocols. */
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417 | list_len = (unsigned short*)(&alpn_buffer[cur]);
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418 | cur += sizeof(unsigned short);
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419 |
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420 | list_start_index = cur;
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421 |
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422 | #ifdef USE_NGHTTP2
|
---|
423 | if(data->set.httpversion >= CURL_HTTP_VERSION_2) {
|
---|
424 | memcpy(&alpn_buffer[cur], NGHTTP2_PROTO_ALPN, NGHTTP2_PROTO_ALPN_LEN);
|
---|
425 | cur += NGHTTP2_PROTO_ALPN_LEN;
|
---|
426 | infof(data, "schannel: ALPN, offering %s\n", NGHTTP2_PROTO_VERSION_ID);
|
---|
427 | }
|
---|
428 | #endif
|
---|
429 |
|
---|
430 | alpn_buffer[cur++] = ALPN_HTTP_1_1_LENGTH;
|
---|
431 | memcpy(&alpn_buffer[cur], ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH);
|
---|
432 | cur += ALPN_HTTP_1_1_LENGTH;
|
---|
433 | infof(data, "schannel: ALPN, offering %s\n", ALPN_HTTP_1_1);
|
---|
434 |
|
---|
435 | *list_len = curlx_uitous(cur - list_start_index);
|
---|
436 | *extension_len = *list_len + sizeof(unsigned int) + sizeof(unsigned short);
|
---|
437 |
|
---|
438 | InitSecBuffer(&inbuf, SECBUFFER_APPLICATION_PROTOCOLS, alpn_buffer, cur);
|
---|
439 | InitSecBufferDesc(&inbuf_desc, &inbuf, 1);
|
---|
440 | }
|
---|
441 | else
|
---|
442 | {
|
---|
443 | InitSecBuffer(&inbuf, SECBUFFER_EMPTY, NULL, 0);
|
---|
444 | InitSecBufferDesc(&inbuf_desc, &inbuf, 1);
|
---|
445 | }
|
---|
446 | #else /* HAS_ALPN */
|
---|
447 | InitSecBuffer(&inbuf, SECBUFFER_EMPTY, NULL, 0);
|
---|
448 | InitSecBufferDesc(&inbuf_desc, &inbuf, 1);
|
---|
449 | #endif
|
---|
450 |
|
---|
451 | /* setup output buffer */
|
---|
452 | InitSecBuffer(&outbuf, SECBUFFER_EMPTY, NULL, 0);
|
---|
453 | InitSecBufferDesc(&outbuf_desc, &outbuf, 1);
|
---|
454 |
|
---|
455 | /* setup request flags */
|
---|
456 | BACKEND->req_flags = ISC_REQ_SEQUENCE_DETECT | ISC_REQ_REPLAY_DETECT |
|
---|
457 | ISC_REQ_CONFIDENTIALITY | ISC_REQ_ALLOCATE_MEMORY |
|
---|
458 | ISC_REQ_STREAM;
|
---|
459 |
|
---|
460 | /* allocate memory for the security context handle */
|
---|
461 | BACKEND->ctxt = (struct curl_schannel_ctxt *)
|
---|
462 | malloc(sizeof(struct curl_schannel_ctxt));
|
---|
463 | if(!BACKEND->ctxt) {
|
---|
464 | failf(data, "schannel: unable to allocate memory");
|
---|
465 | return CURLE_OUT_OF_MEMORY;
|
---|
466 | }
|
---|
467 | memset(BACKEND->ctxt, 0, sizeof(struct curl_schannel_ctxt));
|
---|
468 |
|
---|
469 | host_name = Curl_convert_UTF8_to_tchar(hostname);
|
---|
470 | if(!host_name)
|
---|
471 | return CURLE_OUT_OF_MEMORY;
|
---|
472 |
|
---|
473 | /* Schannel InitializeSecurityContext:
|
---|
474 | https://msdn.microsoft.com/en-us/library/windows/desktop/aa375924.aspx
|
---|
475 |
|
---|
476 | At the moment we don't pass inbuf unless we're using ALPN since we only
|
---|
477 | use it for that, and Wine (for which we currently disable ALPN) is giving
|
---|
478 | us problems with inbuf regardless. https://github.com/curl/curl/issues/983
|
---|
479 | */
|
---|
480 | sspi_status = s_pSecFn->InitializeSecurityContext(
|
---|
481 | &BACKEND->cred->cred_handle, NULL, host_name, BACKEND->req_flags, 0, 0,
|
---|
482 | (BACKEND->use_alpn ? &inbuf_desc : NULL),
|
---|
483 | 0, &BACKEND->ctxt->ctxt_handle,
|
---|
484 | &outbuf_desc, &BACKEND->ret_flags, &BACKEND->ctxt->time_stamp);
|
---|
485 |
|
---|
486 | Curl_unicodefree(host_name);
|
---|
487 |
|
---|
488 | if(sspi_status != SEC_I_CONTINUE_NEEDED) {
|
---|
489 | if(sspi_status == SEC_E_WRONG_PRINCIPAL)
|
---|
490 | failf(data, "schannel: SNI or certificate check failed: %s",
|
---|
491 | Curl_sspi_strerror(conn, sspi_status));
|
---|
492 | else
|
---|
493 | failf(data, "schannel: initial InitializeSecurityContext failed: %s",
|
---|
494 | Curl_sspi_strerror(conn, sspi_status));
|
---|
495 | Curl_safefree(BACKEND->ctxt);
|
---|
496 | return CURLE_SSL_CONNECT_ERROR;
|
---|
497 | }
|
---|
498 |
|
---|
499 | infof(data, "schannel: sending initial handshake data: "
|
---|
500 | "sending %lu bytes...\n", outbuf.cbBuffer);
|
---|
501 |
|
---|
502 | /* send initial handshake data which is now stored in output buffer */
|
---|
503 | result = Curl_write_plain(conn, conn->sock[sockindex], outbuf.pvBuffer,
|
---|
504 | outbuf.cbBuffer, &written);
|
---|
505 | s_pSecFn->FreeContextBuffer(outbuf.pvBuffer);
|
---|
506 | if((result != CURLE_OK) || (outbuf.cbBuffer != (size_t) written)) {
|
---|
507 | failf(data, "schannel: failed to send initial handshake data: "
|
---|
508 | "sent %zd of %lu bytes", written, outbuf.cbBuffer);
|
---|
509 | return CURLE_SSL_CONNECT_ERROR;
|
---|
510 | }
|
---|
511 |
|
---|
512 | infof(data, "schannel: sent initial handshake data: "
|
---|
513 | "sent %zd bytes\n", written);
|
---|
514 |
|
---|
515 | BACKEND->recv_unrecoverable_err = CURLE_OK;
|
---|
516 | BACKEND->recv_sspi_close_notify = false;
|
---|
517 | BACKEND->recv_connection_closed = false;
|
---|
518 | BACKEND->encdata_is_incomplete = false;
|
---|
519 |
|
---|
520 | /* continue to second handshake step */
|
---|
521 | connssl->connecting_state = ssl_connect_2;
|
---|
522 |
|
---|
523 | return CURLE_OK;
|
---|
524 | }
|
---|
525 |
|
---|
526 | static CURLcode
|
---|
527 | schannel_connect_step2(struct connectdata *conn, int sockindex)
|
---|
528 | {
|
---|
529 | int i;
|
---|
530 | ssize_t nread = -1, written = -1;
|
---|
531 | struct Curl_easy *data = conn->data;
|
---|
532 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
533 | unsigned char *reallocated_buffer;
|
---|
534 | size_t reallocated_length;
|
---|
535 | SecBuffer outbuf[3];
|
---|
536 | SecBufferDesc outbuf_desc;
|
---|
537 | SecBuffer inbuf[2];
|
---|
538 | SecBufferDesc inbuf_desc;
|
---|
539 | SECURITY_STATUS sspi_status = SEC_E_OK;
|
---|
540 | TCHAR *host_name;
|
---|
541 | CURLcode result;
|
---|
542 | bool doread;
|
---|
543 | char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
|
---|
544 | conn->host.name;
|
---|
545 |
|
---|
546 | doread = (connssl->connecting_state != ssl_connect_2_writing) ? TRUE : FALSE;
|
---|
547 |
|
---|
548 | infof(data, "schannel: SSL/TLS connection with %s port %hu (step 2/3)\n",
|
---|
549 | hostname, conn->remote_port);
|
---|
550 |
|
---|
551 | if(!BACKEND->cred || !BACKEND->ctxt)
|
---|
552 | return CURLE_SSL_CONNECT_ERROR;
|
---|
553 |
|
---|
554 | /* buffer to store previously received and decrypted data */
|
---|
555 | if(BACKEND->decdata_buffer == NULL) {
|
---|
556 | BACKEND->decdata_offset = 0;
|
---|
557 | BACKEND->decdata_length = CURL_SCHANNEL_BUFFER_INIT_SIZE;
|
---|
558 | BACKEND->decdata_buffer = malloc(BACKEND->decdata_length);
|
---|
559 | if(BACKEND->decdata_buffer == NULL) {
|
---|
560 | failf(data, "schannel: unable to allocate memory");
|
---|
561 | return CURLE_OUT_OF_MEMORY;
|
---|
562 | }
|
---|
563 | }
|
---|
564 |
|
---|
565 | /* buffer to store previously received and encrypted data */
|
---|
566 | if(BACKEND->encdata_buffer == NULL) {
|
---|
567 | BACKEND->encdata_is_incomplete = false;
|
---|
568 | BACKEND->encdata_offset = 0;
|
---|
569 | BACKEND->encdata_length = CURL_SCHANNEL_BUFFER_INIT_SIZE;
|
---|
570 | BACKEND->encdata_buffer = malloc(BACKEND->encdata_length);
|
---|
571 | if(BACKEND->encdata_buffer == NULL) {
|
---|
572 | failf(data, "schannel: unable to allocate memory");
|
---|
573 | return CURLE_OUT_OF_MEMORY;
|
---|
574 | }
|
---|
575 | }
|
---|
576 |
|
---|
577 | /* if we need a bigger buffer to read a full message, increase buffer now */
|
---|
578 | if(BACKEND->encdata_length - BACKEND->encdata_offset <
|
---|
579 | CURL_SCHANNEL_BUFFER_FREE_SIZE) {
|
---|
580 | /* increase internal encrypted data buffer */
|
---|
581 | reallocated_length = BACKEND->encdata_offset +
|
---|
582 | CURL_SCHANNEL_BUFFER_FREE_SIZE;
|
---|
583 | reallocated_buffer = realloc(BACKEND->encdata_buffer,
|
---|
584 | reallocated_length);
|
---|
585 |
|
---|
586 | if(reallocated_buffer == NULL) {
|
---|
587 | failf(data, "schannel: unable to re-allocate memory");
|
---|
588 | return CURLE_OUT_OF_MEMORY;
|
---|
589 | }
|
---|
590 | else {
|
---|
591 | BACKEND->encdata_buffer = reallocated_buffer;
|
---|
592 | BACKEND->encdata_length = reallocated_length;
|
---|
593 | }
|
---|
594 | }
|
---|
595 |
|
---|
596 | for(;;) {
|
---|
597 | if(doread) {
|
---|
598 | /* read encrypted handshake data from socket */
|
---|
599 | result = Curl_read_plain(conn->sock[sockindex],
|
---|
600 | (char *) (BACKEND->encdata_buffer +
|
---|
601 | BACKEND->encdata_offset),
|
---|
602 | BACKEND->encdata_length -
|
---|
603 | BACKEND->encdata_offset,
|
---|
604 | &nread);
|
---|
605 | if(result == CURLE_AGAIN) {
|
---|
606 | if(connssl->connecting_state != ssl_connect_2_writing)
|
---|
607 | connssl->connecting_state = ssl_connect_2_reading;
|
---|
608 | infof(data, "schannel: failed to receive handshake, "
|
---|
609 | "need more data\n");
|
---|
610 | return CURLE_OK;
|
---|
611 | }
|
---|
612 | else if((result != CURLE_OK) || (nread == 0)) {
|
---|
613 | failf(data, "schannel: failed to receive handshake, "
|
---|
614 | "SSL/TLS connection failed");
|
---|
615 | return CURLE_SSL_CONNECT_ERROR;
|
---|
616 | }
|
---|
617 |
|
---|
618 | /* increase encrypted data buffer offset */
|
---|
619 | BACKEND->encdata_offset += nread;
|
---|
620 | BACKEND->encdata_is_incomplete = false;
|
---|
621 | infof(data, "schannel: encrypted data got %zd\n", nread);
|
---|
622 | }
|
---|
623 |
|
---|
624 | infof(data, "schannel: encrypted data buffer: offset %zu length %zu\n",
|
---|
625 | BACKEND->encdata_offset, BACKEND->encdata_length);
|
---|
626 |
|
---|
627 | /* setup input buffers */
|
---|
628 | InitSecBuffer(&inbuf[0], SECBUFFER_TOKEN, malloc(BACKEND->encdata_offset),
|
---|
629 | curlx_uztoul(BACKEND->encdata_offset));
|
---|
630 | InitSecBuffer(&inbuf[1], SECBUFFER_EMPTY, NULL, 0);
|
---|
631 | InitSecBufferDesc(&inbuf_desc, inbuf, 2);
|
---|
632 |
|
---|
633 | /* setup output buffers */
|
---|
634 | InitSecBuffer(&outbuf[0], SECBUFFER_TOKEN, NULL, 0);
|
---|
635 | InitSecBuffer(&outbuf[1], SECBUFFER_ALERT, NULL, 0);
|
---|
636 | InitSecBuffer(&outbuf[2], SECBUFFER_EMPTY, NULL, 0);
|
---|
637 | InitSecBufferDesc(&outbuf_desc, outbuf, 3);
|
---|
638 |
|
---|
639 | if(inbuf[0].pvBuffer == NULL) {
|
---|
640 | failf(data, "schannel: unable to allocate memory");
|
---|
641 | return CURLE_OUT_OF_MEMORY;
|
---|
642 | }
|
---|
643 |
|
---|
644 | /* copy received handshake data into input buffer */
|
---|
645 | memcpy(inbuf[0].pvBuffer, BACKEND->encdata_buffer,
|
---|
646 | BACKEND->encdata_offset);
|
---|
647 |
|
---|
648 | host_name = Curl_convert_UTF8_to_tchar(hostname);
|
---|
649 | if(!host_name)
|
---|
650 | return CURLE_OUT_OF_MEMORY;
|
---|
651 |
|
---|
652 | /* https://msdn.microsoft.com/en-us/library/windows/desktop/aa375924.aspx
|
---|
653 | */
|
---|
654 | sspi_status = s_pSecFn->InitializeSecurityContext(
|
---|
655 | &BACKEND->cred->cred_handle, &BACKEND->ctxt->ctxt_handle,
|
---|
656 | host_name, BACKEND->req_flags, 0, 0, &inbuf_desc, 0, NULL,
|
---|
657 | &outbuf_desc, &BACKEND->ret_flags, &BACKEND->ctxt->time_stamp);
|
---|
658 |
|
---|
659 | Curl_unicodefree(host_name);
|
---|
660 |
|
---|
661 | /* free buffer for received handshake data */
|
---|
662 | Curl_safefree(inbuf[0].pvBuffer);
|
---|
663 |
|
---|
664 | /* check if the handshake was incomplete */
|
---|
665 | if(sspi_status == SEC_E_INCOMPLETE_MESSAGE) {
|
---|
666 | BACKEND->encdata_is_incomplete = true;
|
---|
667 | connssl->connecting_state = ssl_connect_2_reading;
|
---|
668 | infof(data, "schannel: received incomplete message, need more data\n");
|
---|
669 | return CURLE_OK;
|
---|
670 | }
|
---|
671 |
|
---|
672 | /* If the server has requested a client certificate, attempt to continue
|
---|
673 | the handshake without one. This will allow connections to servers which
|
---|
674 | request a client certificate but do not require it. */
|
---|
675 | if(sspi_status == SEC_I_INCOMPLETE_CREDENTIALS &&
|
---|
676 | !(BACKEND->req_flags & ISC_REQ_USE_SUPPLIED_CREDS)) {
|
---|
677 | BACKEND->req_flags |= ISC_REQ_USE_SUPPLIED_CREDS;
|
---|
678 | connssl->connecting_state = ssl_connect_2_writing;
|
---|
679 | infof(data, "schannel: a client certificate has been requested\n");
|
---|
680 | return CURLE_OK;
|
---|
681 | }
|
---|
682 |
|
---|
683 | /* check if the handshake needs to be continued */
|
---|
684 | if(sspi_status == SEC_I_CONTINUE_NEEDED || sspi_status == SEC_E_OK) {
|
---|
685 | for(i = 0; i < 3; i++) {
|
---|
686 | /* search for handshake tokens that need to be send */
|
---|
687 | if(outbuf[i].BufferType == SECBUFFER_TOKEN && outbuf[i].cbBuffer > 0) {
|
---|
688 | infof(data, "schannel: sending next handshake data: "
|
---|
689 | "sending %lu bytes...\n", outbuf[i].cbBuffer);
|
---|
690 |
|
---|
691 | /* send handshake token to server */
|
---|
692 | result = Curl_write_plain(conn, conn->sock[sockindex],
|
---|
693 | outbuf[i].pvBuffer, outbuf[i].cbBuffer,
|
---|
694 | &written);
|
---|
695 | if((result != CURLE_OK) ||
|
---|
696 | (outbuf[i].cbBuffer != (size_t) written)) {
|
---|
697 | failf(data, "schannel: failed to send next handshake data: "
|
---|
698 | "sent %zd of %lu bytes", written, outbuf[i].cbBuffer);
|
---|
699 | return CURLE_SSL_CONNECT_ERROR;
|
---|
700 | }
|
---|
701 | }
|
---|
702 |
|
---|
703 | /* free obsolete buffer */
|
---|
704 | if(outbuf[i].pvBuffer != NULL) {
|
---|
705 | s_pSecFn->FreeContextBuffer(outbuf[i].pvBuffer);
|
---|
706 | }
|
---|
707 | }
|
---|
708 | }
|
---|
709 | else {
|
---|
710 | if(sspi_status == SEC_E_WRONG_PRINCIPAL)
|
---|
711 | failf(data, "schannel: SNI or certificate check failed: %s",
|
---|
712 | Curl_sspi_strerror(conn, sspi_status));
|
---|
713 | else
|
---|
714 | failf(data, "schannel: next InitializeSecurityContext failed: %s",
|
---|
715 | Curl_sspi_strerror(conn, sspi_status));
|
---|
716 | return sspi_status == SEC_E_UNTRUSTED_ROOT ?
|
---|
717 | CURLE_SSL_CACERT : CURLE_SSL_CONNECT_ERROR;
|
---|
718 | }
|
---|
719 |
|
---|
720 | /* check if there was additional remaining encrypted data */
|
---|
721 | if(inbuf[1].BufferType == SECBUFFER_EXTRA && inbuf[1].cbBuffer > 0) {
|
---|
722 | infof(data, "schannel: encrypted data length: %lu\n", inbuf[1].cbBuffer);
|
---|
723 | /*
|
---|
724 | There are two cases where we could be getting extra data here:
|
---|
725 | 1) If we're renegotiating a connection and the handshake is already
|
---|
726 | complete (from the server perspective), it can encrypted app data
|
---|
727 | (not handshake data) in an extra buffer at this point.
|
---|
728 | 2) (sspi_status == SEC_I_CONTINUE_NEEDED) We are negotiating a
|
---|
729 | connection and this extra data is part of the handshake.
|
---|
730 | We should process the data immediately; waiting for the socket to
|
---|
731 | be ready may fail since the server is done sending handshake data.
|
---|
732 | */
|
---|
733 | /* check if the remaining data is less than the total amount
|
---|
734 | and therefore begins after the already processed data */
|
---|
735 | if(BACKEND->encdata_offset > inbuf[1].cbBuffer) {
|
---|
736 | memmove(BACKEND->encdata_buffer,
|
---|
737 | (BACKEND->encdata_buffer + BACKEND->encdata_offset) -
|
---|
738 | inbuf[1].cbBuffer, inbuf[1].cbBuffer);
|
---|
739 | BACKEND->encdata_offset = inbuf[1].cbBuffer;
|
---|
740 | if(sspi_status == SEC_I_CONTINUE_NEEDED) {
|
---|
741 | doread = FALSE;
|
---|
742 | continue;
|
---|
743 | }
|
---|
744 | }
|
---|
745 | }
|
---|
746 | else {
|
---|
747 | BACKEND->encdata_offset = 0;
|
---|
748 | }
|
---|
749 | break;
|
---|
750 | }
|
---|
751 |
|
---|
752 | /* check if the handshake needs to be continued */
|
---|
753 | if(sspi_status == SEC_I_CONTINUE_NEEDED) {
|
---|
754 | connssl->connecting_state = ssl_connect_2_reading;
|
---|
755 | return CURLE_OK;
|
---|
756 | }
|
---|
757 |
|
---|
758 | /* check if the handshake is complete */
|
---|
759 | if(sspi_status == SEC_E_OK) {
|
---|
760 | connssl->connecting_state = ssl_connect_3;
|
---|
761 | infof(data, "schannel: SSL/TLS handshake complete\n");
|
---|
762 | }
|
---|
763 |
|
---|
764 | #ifdef _WIN32_WCE
|
---|
765 | /* Windows CE doesn't do any server certificate validation.
|
---|
766 | We have to do it manually. */
|
---|
767 | if(conn->ssl_config.verifypeer)
|
---|
768 | return verify_certificate(conn, sockindex);
|
---|
769 | #endif
|
---|
770 |
|
---|
771 | return CURLE_OK;
|
---|
772 | }
|
---|
773 |
|
---|
774 | static CURLcode
|
---|
775 | schannel_connect_step3(struct connectdata *conn, int sockindex)
|
---|
776 | {
|
---|
777 | CURLcode result = CURLE_OK;
|
---|
778 | struct Curl_easy *data = conn->data;
|
---|
779 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
780 | SECURITY_STATUS sspi_status = SEC_E_OK;
|
---|
781 | CERT_CONTEXT *ccert_context = NULL;
|
---|
782 | #ifndef CURL_DISABLE_VERBOSE_STRINGS
|
---|
783 | const char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
|
---|
784 | conn->host.name;
|
---|
785 | #endif
|
---|
786 | #ifdef HAS_ALPN
|
---|
787 | SecPkgContext_ApplicationProtocol alpn_result;
|
---|
788 | #endif
|
---|
789 |
|
---|
790 | DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
|
---|
791 |
|
---|
792 | infof(data, "schannel: SSL/TLS connection with %s port %hu (step 3/3)\n",
|
---|
793 | hostname, conn->remote_port);
|
---|
794 |
|
---|
795 | if(!BACKEND->cred)
|
---|
796 | return CURLE_SSL_CONNECT_ERROR;
|
---|
797 |
|
---|
798 | /* check if the required context attributes are met */
|
---|
799 | if(BACKEND->ret_flags != BACKEND->req_flags) {
|
---|
800 | if(!(BACKEND->ret_flags & ISC_RET_SEQUENCE_DETECT))
|
---|
801 | failf(data, "schannel: failed to setup sequence detection");
|
---|
802 | if(!(BACKEND->ret_flags & ISC_RET_REPLAY_DETECT))
|
---|
803 | failf(data, "schannel: failed to setup replay detection");
|
---|
804 | if(!(BACKEND->ret_flags & ISC_RET_CONFIDENTIALITY))
|
---|
805 | failf(data, "schannel: failed to setup confidentiality");
|
---|
806 | if(!(BACKEND->ret_flags & ISC_RET_ALLOCATED_MEMORY))
|
---|
807 | failf(data, "schannel: failed to setup memory allocation");
|
---|
808 | if(!(BACKEND->ret_flags & ISC_RET_STREAM))
|
---|
809 | failf(data, "schannel: failed to setup stream orientation");
|
---|
810 | return CURLE_SSL_CONNECT_ERROR;
|
---|
811 | }
|
---|
812 |
|
---|
813 | #ifdef HAS_ALPN
|
---|
814 | if(BACKEND->use_alpn) {
|
---|
815 | sspi_status = s_pSecFn->QueryContextAttributes(&BACKEND->ctxt->ctxt_handle,
|
---|
816 | SECPKG_ATTR_APPLICATION_PROTOCOL, &alpn_result);
|
---|
817 |
|
---|
818 | if(sspi_status != SEC_E_OK) {
|
---|
819 | failf(data, "schannel: failed to retrieve ALPN result");
|
---|
820 | return CURLE_SSL_CONNECT_ERROR;
|
---|
821 | }
|
---|
822 |
|
---|
823 | if(alpn_result.ProtoNegoStatus ==
|
---|
824 | SecApplicationProtocolNegotiationStatus_Success) {
|
---|
825 |
|
---|
826 | infof(data, "schannel: ALPN, server accepted to use %.*s\n",
|
---|
827 | alpn_result.ProtocolIdSize, alpn_result.ProtocolId);
|
---|
828 |
|
---|
829 | #ifdef USE_NGHTTP2
|
---|
830 | if(alpn_result.ProtocolIdSize == NGHTTP2_PROTO_VERSION_ID_LEN &&
|
---|
831 | !memcmp(NGHTTP2_PROTO_VERSION_ID, alpn_result.ProtocolId,
|
---|
832 | NGHTTP2_PROTO_VERSION_ID_LEN)) {
|
---|
833 | conn->negnpn = CURL_HTTP_VERSION_2;
|
---|
834 | }
|
---|
835 | else
|
---|
836 | #endif
|
---|
837 | if(alpn_result.ProtocolIdSize == ALPN_HTTP_1_1_LENGTH &&
|
---|
838 | !memcmp(ALPN_HTTP_1_1, alpn_result.ProtocolId,
|
---|
839 | ALPN_HTTP_1_1_LENGTH)) {
|
---|
840 | conn->negnpn = CURL_HTTP_VERSION_1_1;
|
---|
841 | }
|
---|
842 | }
|
---|
843 | else
|
---|
844 | infof(data, "ALPN, server did not agree to a protocol\n");
|
---|
845 | }
|
---|
846 | #endif
|
---|
847 |
|
---|
848 | /* save the current session data for possible re-use */
|
---|
849 | if(SSL_SET_OPTION(primary.sessionid)) {
|
---|
850 | bool incache;
|
---|
851 | struct curl_schannel_cred *old_cred = NULL;
|
---|
852 |
|
---|
853 | Curl_ssl_sessionid_lock(conn);
|
---|
854 | incache = !(Curl_ssl_getsessionid(conn, (void **)&old_cred, NULL,
|
---|
855 | sockindex));
|
---|
856 | if(incache) {
|
---|
857 | if(old_cred != BACKEND->cred) {
|
---|
858 | infof(data, "schannel: old credential handle is stale, removing\n");
|
---|
859 | /* we're not taking old_cred ownership here, no refcount++ is needed */
|
---|
860 | Curl_ssl_delsessionid(conn, (void *)old_cred);
|
---|
861 | incache = FALSE;
|
---|
862 | }
|
---|
863 | }
|
---|
864 | if(!incache) {
|
---|
865 | result = Curl_ssl_addsessionid(conn, (void *)BACKEND->cred,
|
---|
866 | sizeof(struct curl_schannel_cred),
|
---|
867 | sockindex);
|
---|
868 | if(result) {
|
---|
869 | Curl_ssl_sessionid_unlock(conn);
|
---|
870 | failf(data, "schannel: failed to store credential handle");
|
---|
871 | return result;
|
---|
872 | }
|
---|
873 | else {
|
---|
874 | /* this cred session is now also referenced by sessionid cache */
|
---|
875 | BACKEND->cred->refcount++;
|
---|
876 | infof(data, "schannel: stored credential handle in session cache\n");
|
---|
877 | }
|
---|
878 | }
|
---|
879 | Curl_ssl_sessionid_unlock(conn);
|
---|
880 | }
|
---|
881 |
|
---|
882 | if(data->set.ssl.certinfo) {
|
---|
883 | sspi_status = s_pSecFn->QueryContextAttributes(&BACKEND->ctxt->ctxt_handle,
|
---|
884 | SECPKG_ATTR_REMOTE_CERT_CONTEXT, &ccert_context);
|
---|
885 |
|
---|
886 | if((sspi_status != SEC_E_OK) || (ccert_context == NULL)) {
|
---|
887 | failf(data, "schannel: failed to retrieve remote cert context");
|
---|
888 | return CURLE_SSL_CONNECT_ERROR;
|
---|
889 | }
|
---|
890 |
|
---|
891 | result = Curl_ssl_init_certinfo(data, 1);
|
---|
892 | if(!result) {
|
---|
893 | if(((ccert_context->dwCertEncodingType & X509_ASN_ENCODING) != 0) &&
|
---|
894 | (ccert_context->cbCertEncoded > 0)) {
|
---|
895 |
|
---|
896 | const char *beg = (const char *) ccert_context->pbCertEncoded;
|
---|
897 | const char *end = beg + ccert_context->cbCertEncoded;
|
---|
898 | result = Curl_extract_certinfo(conn, 0, beg, end);
|
---|
899 | }
|
---|
900 | }
|
---|
901 | CertFreeCertificateContext(ccert_context);
|
---|
902 | if(result)
|
---|
903 | return result;
|
---|
904 | }
|
---|
905 |
|
---|
906 | connssl->connecting_state = ssl_connect_done;
|
---|
907 |
|
---|
908 | return CURLE_OK;
|
---|
909 | }
|
---|
910 |
|
---|
911 | static CURLcode
|
---|
912 | schannel_connect_common(struct connectdata *conn, int sockindex,
|
---|
913 | bool nonblocking, bool *done)
|
---|
914 | {
|
---|
915 | CURLcode result;
|
---|
916 | struct Curl_easy *data = conn->data;
|
---|
917 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
918 | curl_socket_t sockfd = conn->sock[sockindex];
|
---|
919 | time_t timeout_ms;
|
---|
920 | int what;
|
---|
921 |
|
---|
922 | /* check if the connection has already been established */
|
---|
923 | if(ssl_connection_complete == connssl->state) {
|
---|
924 | *done = TRUE;
|
---|
925 | return CURLE_OK;
|
---|
926 | }
|
---|
927 |
|
---|
928 | if(ssl_connect_1 == connssl->connecting_state) {
|
---|
929 | /* check out how much more time we're allowed */
|
---|
930 | timeout_ms = Curl_timeleft(data, NULL, TRUE);
|
---|
931 |
|
---|
932 | if(timeout_ms < 0) {
|
---|
933 | /* no need to continue if time already is up */
|
---|
934 | failf(data, "SSL/TLS connection timeout");
|
---|
935 | return CURLE_OPERATION_TIMEDOUT;
|
---|
936 | }
|
---|
937 |
|
---|
938 | result = schannel_connect_step1(conn, sockindex);
|
---|
939 | if(result)
|
---|
940 | return result;
|
---|
941 | }
|
---|
942 |
|
---|
943 | while(ssl_connect_2 == connssl->connecting_state ||
|
---|
944 | ssl_connect_2_reading == connssl->connecting_state ||
|
---|
945 | ssl_connect_2_writing == connssl->connecting_state) {
|
---|
946 |
|
---|
947 | /* check out how much more time we're allowed */
|
---|
948 | timeout_ms = Curl_timeleft(data, NULL, TRUE);
|
---|
949 |
|
---|
950 | if(timeout_ms < 0) {
|
---|
951 | /* no need to continue if time already is up */
|
---|
952 | failf(data, "SSL/TLS connection timeout");
|
---|
953 | return CURLE_OPERATION_TIMEDOUT;
|
---|
954 | }
|
---|
955 |
|
---|
956 | /* if ssl is expecting something, check if it's available. */
|
---|
957 | if(connssl->connecting_state == ssl_connect_2_reading
|
---|
958 | || connssl->connecting_state == ssl_connect_2_writing) {
|
---|
959 |
|
---|
960 | curl_socket_t writefd = ssl_connect_2_writing ==
|
---|
961 | connssl->connecting_state ? sockfd : CURL_SOCKET_BAD;
|
---|
962 | curl_socket_t readfd = ssl_connect_2_reading ==
|
---|
963 | connssl->connecting_state ? sockfd : CURL_SOCKET_BAD;
|
---|
964 |
|
---|
965 | what = Curl_socket_check(readfd, CURL_SOCKET_BAD, writefd,
|
---|
966 | nonblocking ? 0 : timeout_ms);
|
---|
967 | if(what < 0) {
|
---|
968 | /* fatal error */
|
---|
969 | failf(data, "select/poll on SSL/TLS socket, errno: %d", SOCKERRNO);
|
---|
970 | return CURLE_SSL_CONNECT_ERROR;
|
---|
971 | }
|
---|
972 | else if(0 == what) {
|
---|
973 | if(nonblocking) {
|
---|
974 | *done = FALSE;
|
---|
975 | return CURLE_OK;
|
---|
976 | }
|
---|
977 | else {
|
---|
978 | /* timeout */
|
---|
979 | failf(data, "SSL/TLS connection timeout");
|
---|
980 | return CURLE_OPERATION_TIMEDOUT;
|
---|
981 | }
|
---|
982 | }
|
---|
983 | /* socket is readable or writable */
|
---|
984 | }
|
---|
985 |
|
---|
986 | /* Run transaction, and return to the caller if it failed or if
|
---|
987 | * this connection is part of a multi handle and this loop would
|
---|
988 | * execute again. This permits the owner of a multi handle to
|
---|
989 | * abort a connection attempt before step2 has completed while
|
---|
990 | * ensuring that a client using select() or epoll() will always
|
---|
991 | * have a valid fdset to wait on.
|
---|
992 | */
|
---|
993 | result = schannel_connect_step2(conn, sockindex);
|
---|
994 | if(result || (nonblocking &&
|
---|
995 | (ssl_connect_2 == connssl->connecting_state ||
|
---|
996 | ssl_connect_2_reading == connssl->connecting_state ||
|
---|
997 | ssl_connect_2_writing == connssl->connecting_state)))
|
---|
998 | return result;
|
---|
999 |
|
---|
1000 | } /* repeat step2 until all transactions are done. */
|
---|
1001 |
|
---|
1002 | if(ssl_connect_3 == connssl->connecting_state) {
|
---|
1003 | result = schannel_connect_step3(conn, sockindex);
|
---|
1004 | if(result)
|
---|
1005 | return result;
|
---|
1006 | }
|
---|
1007 |
|
---|
1008 | if(ssl_connect_done == connssl->connecting_state) {
|
---|
1009 | connssl->state = ssl_connection_complete;
|
---|
1010 | conn->recv[sockindex] = schannel_recv;
|
---|
1011 | conn->send[sockindex] = schannel_send;
|
---|
1012 | *done = TRUE;
|
---|
1013 | }
|
---|
1014 | else
|
---|
1015 | *done = FALSE;
|
---|
1016 |
|
---|
1017 | /* reset our connection state machine */
|
---|
1018 | connssl->connecting_state = ssl_connect_1;
|
---|
1019 |
|
---|
1020 | return CURLE_OK;
|
---|
1021 | }
|
---|
1022 |
|
---|
1023 | static ssize_t
|
---|
1024 | schannel_send(struct connectdata *conn, int sockindex,
|
---|
1025 | const void *buf, size_t len, CURLcode *err)
|
---|
1026 | {
|
---|
1027 | ssize_t written = -1;
|
---|
1028 | size_t data_len = 0;
|
---|
1029 | unsigned char *data = NULL;
|
---|
1030 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
1031 | SecBuffer outbuf[4];
|
---|
1032 | SecBufferDesc outbuf_desc;
|
---|
1033 | SECURITY_STATUS sspi_status = SEC_E_OK;
|
---|
1034 | CURLcode result;
|
---|
1035 |
|
---|
1036 | /* check if the maximum stream sizes were queried */
|
---|
1037 | if(BACKEND->stream_sizes.cbMaximumMessage == 0) {
|
---|
1038 | sspi_status = s_pSecFn->QueryContextAttributes(
|
---|
1039 | &BACKEND->ctxt->ctxt_handle,
|
---|
1040 | SECPKG_ATTR_STREAM_SIZES,
|
---|
1041 | &BACKEND->stream_sizes);
|
---|
1042 | if(sspi_status != SEC_E_OK) {
|
---|
1043 | *err = CURLE_SEND_ERROR;
|
---|
1044 | return -1;
|
---|
1045 | }
|
---|
1046 | }
|
---|
1047 |
|
---|
1048 | /* check if the buffer is longer than the maximum message length */
|
---|
1049 | if(len > BACKEND->stream_sizes.cbMaximumMessage) {
|
---|
1050 | len = BACKEND->stream_sizes.cbMaximumMessage;
|
---|
1051 | }
|
---|
1052 |
|
---|
1053 | /* calculate the complete message length and allocate a buffer for it */
|
---|
1054 | data_len = BACKEND->stream_sizes.cbHeader + len +
|
---|
1055 | BACKEND->stream_sizes.cbTrailer;
|
---|
1056 | data = (unsigned char *) malloc(data_len);
|
---|
1057 | if(data == NULL) {
|
---|
1058 | *err = CURLE_OUT_OF_MEMORY;
|
---|
1059 | return -1;
|
---|
1060 | }
|
---|
1061 |
|
---|
1062 | /* setup output buffers (header, data, trailer, empty) */
|
---|
1063 | InitSecBuffer(&outbuf[0], SECBUFFER_STREAM_HEADER,
|
---|
1064 | data, BACKEND->stream_sizes.cbHeader);
|
---|
1065 | InitSecBuffer(&outbuf[1], SECBUFFER_DATA,
|
---|
1066 | data + BACKEND->stream_sizes.cbHeader, curlx_uztoul(len));
|
---|
1067 | InitSecBuffer(&outbuf[2], SECBUFFER_STREAM_TRAILER,
|
---|
1068 | data + BACKEND->stream_sizes.cbHeader + len,
|
---|
1069 | BACKEND->stream_sizes.cbTrailer);
|
---|
1070 | InitSecBuffer(&outbuf[3], SECBUFFER_EMPTY, NULL, 0);
|
---|
1071 | InitSecBufferDesc(&outbuf_desc, outbuf, 4);
|
---|
1072 |
|
---|
1073 | /* copy data into output buffer */
|
---|
1074 | memcpy(outbuf[1].pvBuffer, buf, len);
|
---|
1075 |
|
---|
1076 | /* https://msdn.microsoft.com/en-us/library/windows/desktop/aa375390.aspx */
|
---|
1077 | sspi_status = s_pSecFn->EncryptMessage(&BACKEND->ctxt->ctxt_handle, 0,
|
---|
1078 | &outbuf_desc, 0);
|
---|
1079 |
|
---|
1080 | /* check if the message was encrypted */
|
---|
1081 | if(sspi_status == SEC_E_OK) {
|
---|
1082 | written = 0;
|
---|
1083 |
|
---|
1084 | /* send the encrypted message including header, data and trailer */
|
---|
1085 | len = outbuf[0].cbBuffer + outbuf[1].cbBuffer + outbuf[2].cbBuffer;
|
---|
1086 |
|
---|
1087 | /*
|
---|
1088 | It's important to send the full message which includes the header,
|
---|
1089 | encrypted payload, and trailer. Until the client receives all the
|
---|
1090 | data a coherent message has not been delivered and the client
|
---|
1091 | can't read any of it.
|
---|
1092 |
|
---|
1093 | If we wanted to buffer the unwritten encrypted bytes, we would
|
---|
1094 | tell the client that all data it has requested to be sent has been
|
---|
1095 | sent. The unwritten encrypted bytes would be the first bytes to
|
---|
1096 | send on the next invocation.
|
---|
1097 | Here's the catch with this - if we tell the client that all the
|
---|
1098 | bytes have been sent, will the client call this method again to
|
---|
1099 | send the buffered data? Looking at who calls this function, it
|
---|
1100 | seems the answer is NO.
|
---|
1101 | */
|
---|
1102 |
|
---|
1103 | /* send entire message or fail */
|
---|
1104 | while(len > (size_t)written) {
|
---|
1105 | ssize_t this_write;
|
---|
1106 | time_t timeleft;
|
---|
1107 | int what;
|
---|
1108 |
|
---|
1109 | this_write = 0;
|
---|
1110 |
|
---|
1111 | timeleft = Curl_timeleft(conn->data, NULL, FALSE);
|
---|
1112 | if(timeleft < 0) {
|
---|
1113 | /* we already got the timeout */
|
---|
1114 | failf(conn->data, "schannel: timed out sending data "
|
---|
1115 | "(bytes sent: %zd)", written);
|
---|
1116 | *err = CURLE_OPERATION_TIMEDOUT;
|
---|
1117 | written = -1;
|
---|
1118 | break;
|
---|
1119 | }
|
---|
1120 |
|
---|
1121 | what = SOCKET_WRITABLE(conn->sock[sockindex], timeleft);
|
---|
1122 | if(what < 0) {
|
---|
1123 | /* fatal error */
|
---|
1124 | failf(conn->data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
|
---|
1125 | *err = CURLE_SEND_ERROR;
|
---|
1126 | written = -1;
|
---|
1127 | break;
|
---|
1128 | }
|
---|
1129 | else if(0 == what) {
|
---|
1130 | failf(conn->data, "schannel: timed out sending data "
|
---|
1131 | "(bytes sent: %zd)", written);
|
---|
1132 | *err = CURLE_OPERATION_TIMEDOUT;
|
---|
1133 | written = -1;
|
---|
1134 | break;
|
---|
1135 | }
|
---|
1136 | /* socket is writable */
|
---|
1137 |
|
---|
1138 | result = Curl_write_plain(conn, conn->sock[sockindex], data + written,
|
---|
1139 | len - written, &this_write);
|
---|
1140 | if(result == CURLE_AGAIN)
|
---|
1141 | continue;
|
---|
1142 | else if(result != CURLE_OK) {
|
---|
1143 | *err = result;
|
---|
1144 | written = -1;
|
---|
1145 | break;
|
---|
1146 | }
|
---|
1147 |
|
---|
1148 | written += this_write;
|
---|
1149 | }
|
---|
1150 | }
|
---|
1151 | else if(sspi_status == SEC_E_INSUFFICIENT_MEMORY) {
|
---|
1152 | *err = CURLE_OUT_OF_MEMORY;
|
---|
1153 | }
|
---|
1154 | else{
|
---|
1155 | *err = CURLE_SEND_ERROR;
|
---|
1156 | }
|
---|
1157 |
|
---|
1158 | Curl_safefree(data);
|
---|
1159 |
|
---|
1160 | if(len == (size_t)written)
|
---|
1161 | /* Encrypted message including header, data and trailer entirely sent.
|
---|
1162 | The return value is the number of unencrypted bytes that were sent. */
|
---|
1163 | written = outbuf[1].cbBuffer;
|
---|
1164 |
|
---|
1165 | return written;
|
---|
1166 | }
|
---|
1167 |
|
---|
1168 | static ssize_t
|
---|
1169 | schannel_recv(struct connectdata *conn, int sockindex,
|
---|
1170 | char *buf, size_t len, CURLcode *err)
|
---|
1171 | {
|
---|
1172 | size_t size = 0;
|
---|
1173 | ssize_t nread = -1;
|
---|
1174 | struct Curl_easy *data = conn->data;
|
---|
1175 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
1176 | unsigned char *reallocated_buffer;
|
---|
1177 | size_t reallocated_length;
|
---|
1178 | bool done = FALSE;
|
---|
1179 | SecBuffer inbuf[4];
|
---|
1180 | SecBufferDesc inbuf_desc;
|
---|
1181 | SECURITY_STATUS sspi_status = SEC_E_OK;
|
---|
1182 | /* we want the length of the encrypted buffer to be at least large enough
|
---|
1183 | that it can hold all the bytes requested and some TLS record overhead. */
|
---|
1184 | size_t min_encdata_length = len + CURL_SCHANNEL_BUFFER_FREE_SIZE;
|
---|
1185 |
|
---|
1186 | /****************************************************************************
|
---|
1187 | * Don't return or set BACKEND->recv_unrecoverable_err unless in the cleanup.
|
---|
1188 | * The pattern for return error is set *err, optional infof, goto cleanup.
|
---|
1189 | *
|
---|
1190 | * Our priority is to always return as much decrypted data to the caller as
|
---|
1191 | * possible, even if an error occurs. The state of the decrypted buffer must
|
---|
1192 | * always be valid. Transfer of decrypted data to the caller's buffer is
|
---|
1193 | * handled in the cleanup.
|
---|
1194 | */
|
---|
1195 |
|
---|
1196 | infof(data, "schannel: client wants to read %zu bytes\n", len);
|
---|
1197 | *err = CURLE_OK;
|
---|
1198 |
|
---|
1199 | if(len && len <= BACKEND->decdata_offset) {
|
---|
1200 | infof(data, "schannel: enough decrypted data is already available\n");
|
---|
1201 | goto cleanup;
|
---|
1202 | }
|
---|
1203 | else if(BACKEND->recv_unrecoverable_err) {
|
---|
1204 | *err = BACKEND->recv_unrecoverable_err;
|
---|
1205 | infof(data, "schannel: an unrecoverable error occurred in a prior call\n");
|
---|
1206 | goto cleanup;
|
---|
1207 | }
|
---|
1208 | else if(BACKEND->recv_sspi_close_notify) {
|
---|
1209 | /* once a server has indicated shutdown there is no more encrypted data */
|
---|
1210 | infof(data, "schannel: server indicated shutdown in a prior call\n");
|
---|
1211 | goto cleanup;
|
---|
1212 | }
|
---|
1213 | else if(!len) {
|
---|
1214 | /* It's debatable what to return when !len. Regardless we can't return
|
---|
1215 | immediately because there may be data to decrypt (in the case we want to
|
---|
1216 | decrypt all encrypted cached data) so handle !len later in cleanup.
|
---|
1217 | */
|
---|
1218 | ; /* do nothing */
|
---|
1219 | }
|
---|
1220 | else if(!BACKEND->recv_connection_closed) {
|
---|
1221 | /* increase enc buffer in order to fit the requested amount of data */
|
---|
1222 | size = BACKEND->encdata_length - BACKEND->encdata_offset;
|
---|
1223 | if(size < CURL_SCHANNEL_BUFFER_FREE_SIZE ||
|
---|
1224 | BACKEND->encdata_length < min_encdata_length) {
|
---|
1225 | reallocated_length = BACKEND->encdata_offset +
|
---|
1226 | CURL_SCHANNEL_BUFFER_FREE_SIZE;
|
---|
1227 | if(reallocated_length < min_encdata_length) {
|
---|
1228 | reallocated_length = min_encdata_length;
|
---|
1229 | }
|
---|
1230 | reallocated_buffer = realloc(BACKEND->encdata_buffer,
|
---|
1231 | reallocated_length);
|
---|
1232 | if(reallocated_buffer == NULL) {
|
---|
1233 | *err = CURLE_OUT_OF_MEMORY;
|
---|
1234 | failf(data, "schannel: unable to re-allocate memory");
|
---|
1235 | goto cleanup;
|
---|
1236 | }
|
---|
1237 |
|
---|
1238 | BACKEND->encdata_buffer = reallocated_buffer;
|
---|
1239 | BACKEND->encdata_length = reallocated_length;
|
---|
1240 | size = BACKEND->encdata_length - BACKEND->encdata_offset;
|
---|
1241 | infof(data, "schannel: encdata_buffer resized %zu\n",
|
---|
1242 | BACKEND->encdata_length);
|
---|
1243 | }
|
---|
1244 |
|
---|
1245 | infof(data, "schannel: encrypted data buffer: offset %zu length %zu\n",
|
---|
1246 | BACKEND->encdata_offset, BACKEND->encdata_length);
|
---|
1247 |
|
---|
1248 | /* read encrypted data from socket */
|
---|
1249 | *err = Curl_read_plain(conn->sock[sockindex],
|
---|
1250 | (char *)(BACKEND->encdata_buffer +
|
---|
1251 | BACKEND->encdata_offset),
|
---|
1252 | size, &nread);
|
---|
1253 | if(*err) {
|
---|
1254 | nread = -1;
|
---|
1255 | if(*err == CURLE_AGAIN)
|
---|
1256 | infof(data, "schannel: Curl_read_plain returned CURLE_AGAIN\n");
|
---|
1257 | else if(*err == CURLE_RECV_ERROR)
|
---|
1258 | infof(data, "schannel: Curl_read_plain returned CURLE_RECV_ERROR\n");
|
---|
1259 | else
|
---|
1260 | infof(data, "schannel: Curl_read_plain returned error %d\n", *err);
|
---|
1261 | }
|
---|
1262 | else if(nread == 0) {
|
---|
1263 | BACKEND->recv_connection_closed = true;
|
---|
1264 | infof(data, "schannel: server closed the connection\n");
|
---|
1265 | }
|
---|
1266 | else if(nread > 0) {
|
---|
1267 | BACKEND->encdata_offset += (size_t)nread;
|
---|
1268 | BACKEND->encdata_is_incomplete = false;
|
---|
1269 | infof(data, "schannel: encrypted data got %zd\n", nread);
|
---|
1270 | }
|
---|
1271 | }
|
---|
1272 |
|
---|
1273 | infof(data, "schannel: encrypted data buffer: offset %zu length %zu\n",
|
---|
1274 | BACKEND->encdata_offset, BACKEND->encdata_length);
|
---|
1275 |
|
---|
1276 | /* decrypt loop */
|
---|
1277 | while(BACKEND->encdata_offset > 0 && sspi_status == SEC_E_OK &&
|
---|
1278 | (!len || BACKEND->decdata_offset < len ||
|
---|
1279 | BACKEND->recv_connection_closed)) {
|
---|
1280 | /* prepare data buffer for DecryptMessage call */
|
---|
1281 | InitSecBuffer(&inbuf[0], SECBUFFER_DATA, BACKEND->encdata_buffer,
|
---|
1282 | curlx_uztoul(BACKEND->encdata_offset));
|
---|
1283 |
|
---|
1284 | /* we need 3 more empty input buffers for possible output */
|
---|
1285 | InitSecBuffer(&inbuf[1], SECBUFFER_EMPTY, NULL, 0);
|
---|
1286 | InitSecBuffer(&inbuf[2], SECBUFFER_EMPTY, NULL, 0);
|
---|
1287 | InitSecBuffer(&inbuf[3], SECBUFFER_EMPTY, NULL, 0);
|
---|
1288 | InitSecBufferDesc(&inbuf_desc, inbuf, 4);
|
---|
1289 |
|
---|
1290 | /* https://msdn.microsoft.com/en-us/library/windows/desktop/aa375348.aspx
|
---|
1291 | */
|
---|
1292 | sspi_status = s_pSecFn->DecryptMessage(&BACKEND->ctxt->ctxt_handle,
|
---|
1293 | &inbuf_desc, 0, NULL);
|
---|
1294 |
|
---|
1295 | /* check if everything went fine (server may want to renegotiate
|
---|
1296 | or shutdown the connection context) */
|
---|
1297 | if(sspi_status == SEC_E_OK || sspi_status == SEC_I_RENEGOTIATE ||
|
---|
1298 | sspi_status == SEC_I_CONTEXT_EXPIRED) {
|
---|
1299 | /* check for successfully decrypted data, even before actual
|
---|
1300 | renegotiation or shutdown of the connection context */
|
---|
1301 | if(inbuf[1].BufferType == SECBUFFER_DATA) {
|
---|
1302 | infof(data, "schannel: decrypted data length: %lu\n",
|
---|
1303 | inbuf[1].cbBuffer);
|
---|
1304 |
|
---|
1305 | /* increase buffer in order to fit the received amount of data */
|
---|
1306 | size = inbuf[1].cbBuffer > CURL_SCHANNEL_BUFFER_FREE_SIZE ?
|
---|
1307 | inbuf[1].cbBuffer : CURL_SCHANNEL_BUFFER_FREE_SIZE;
|
---|
1308 | if(BACKEND->decdata_length - BACKEND->decdata_offset < size ||
|
---|
1309 | BACKEND->decdata_length < len) {
|
---|
1310 | /* increase internal decrypted data buffer */
|
---|
1311 | reallocated_length = BACKEND->decdata_offset + size;
|
---|
1312 | /* make sure that the requested amount of data fits */
|
---|
1313 | if(reallocated_length < len) {
|
---|
1314 | reallocated_length = len;
|
---|
1315 | }
|
---|
1316 | reallocated_buffer = realloc(BACKEND->decdata_buffer,
|
---|
1317 | reallocated_length);
|
---|
1318 | if(reallocated_buffer == NULL) {
|
---|
1319 | *err = CURLE_OUT_OF_MEMORY;
|
---|
1320 | failf(data, "schannel: unable to re-allocate memory");
|
---|
1321 | goto cleanup;
|
---|
1322 | }
|
---|
1323 | BACKEND->decdata_buffer = reallocated_buffer;
|
---|
1324 | BACKEND->decdata_length = reallocated_length;
|
---|
1325 | }
|
---|
1326 |
|
---|
1327 | /* copy decrypted data to internal buffer */
|
---|
1328 | size = inbuf[1].cbBuffer;
|
---|
1329 | if(size) {
|
---|
1330 | memcpy(BACKEND->decdata_buffer + BACKEND->decdata_offset,
|
---|
1331 | inbuf[1].pvBuffer, size);
|
---|
1332 | BACKEND->decdata_offset += size;
|
---|
1333 | }
|
---|
1334 |
|
---|
1335 | infof(data, "schannel: decrypted data added: %zu\n", size);
|
---|
1336 | infof(data, "schannel: decrypted data cached: offset %zu length %zu\n",
|
---|
1337 | BACKEND->decdata_offset, BACKEND->decdata_length);
|
---|
1338 | }
|
---|
1339 |
|
---|
1340 | /* check for remaining encrypted data */
|
---|
1341 | if(inbuf[3].BufferType == SECBUFFER_EXTRA && inbuf[3].cbBuffer > 0) {
|
---|
1342 | infof(data, "schannel: encrypted data length: %lu\n",
|
---|
1343 | inbuf[3].cbBuffer);
|
---|
1344 |
|
---|
1345 | /* check if the remaining data is less than the total amount
|
---|
1346 | * and therefore begins after the already processed data
|
---|
1347 | */
|
---|
1348 | if(BACKEND->encdata_offset > inbuf[3].cbBuffer) {
|
---|
1349 | /* move remaining encrypted data forward to the beginning of
|
---|
1350 | buffer */
|
---|
1351 | memmove(BACKEND->encdata_buffer,
|
---|
1352 | (BACKEND->encdata_buffer + BACKEND->encdata_offset) -
|
---|
1353 | inbuf[3].cbBuffer, inbuf[3].cbBuffer);
|
---|
1354 | BACKEND->encdata_offset = inbuf[3].cbBuffer;
|
---|
1355 | }
|
---|
1356 |
|
---|
1357 | infof(data, "schannel: encrypted data cached: offset %zu length %zu\n",
|
---|
1358 | BACKEND->encdata_offset, BACKEND->encdata_length);
|
---|
1359 | }
|
---|
1360 | else {
|
---|
1361 | /* reset encrypted buffer offset, because there is no data remaining */
|
---|
1362 | BACKEND->encdata_offset = 0;
|
---|
1363 | }
|
---|
1364 |
|
---|
1365 | /* check if server wants to renegotiate the connection context */
|
---|
1366 | if(sspi_status == SEC_I_RENEGOTIATE) {
|
---|
1367 | infof(data, "schannel: remote party requests renegotiation\n");
|
---|
1368 | if(*err && *err != CURLE_AGAIN) {
|
---|
1369 | infof(data, "schannel: can't renogotiate, an error is pending\n");
|
---|
1370 | goto cleanup;
|
---|
1371 | }
|
---|
1372 | if(BACKEND->encdata_offset) {
|
---|
1373 | *err = CURLE_RECV_ERROR;
|
---|
1374 | infof(data, "schannel: can't renogotiate, "
|
---|
1375 | "encrypted data available\n");
|
---|
1376 | goto cleanup;
|
---|
1377 | }
|
---|
1378 | /* begin renegotiation */
|
---|
1379 | infof(data, "schannel: renegotiating SSL/TLS connection\n");
|
---|
1380 | connssl->state = ssl_connection_negotiating;
|
---|
1381 | connssl->connecting_state = ssl_connect_2_writing;
|
---|
1382 | *err = schannel_connect_common(conn, sockindex, FALSE, &done);
|
---|
1383 | if(*err) {
|
---|
1384 | infof(data, "schannel: renegotiation failed\n");
|
---|
1385 | goto cleanup;
|
---|
1386 | }
|
---|
1387 | /* now retry receiving data */
|
---|
1388 | sspi_status = SEC_E_OK;
|
---|
1389 | infof(data, "schannel: SSL/TLS connection renegotiated\n");
|
---|
1390 | continue;
|
---|
1391 | }
|
---|
1392 | /* check if the server closed the connection */
|
---|
1393 | else if(sspi_status == SEC_I_CONTEXT_EXPIRED) {
|
---|
1394 | /* In Windows 2000 SEC_I_CONTEXT_EXPIRED (close_notify) is not
|
---|
1395 | returned so we have to work around that in cleanup. */
|
---|
1396 | BACKEND->recv_sspi_close_notify = true;
|
---|
1397 | if(!BACKEND->recv_connection_closed) {
|
---|
1398 | BACKEND->recv_connection_closed = true;
|
---|
1399 | infof(data, "schannel: server closed the connection\n");
|
---|
1400 | }
|
---|
1401 | goto cleanup;
|
---|
1402 | }
|
---|
1403 | }
|
---|
1404 | else if(sspi_status == SEC_E_INCOMPLETE_MESSAGE) {
|
---|
1405 | BACKEND->encdata_is_incomplete = true;
|
---|
1406 | if(!*err)
|
---|
1407 | *err = CURLE_AGAIN;
|
---|
1408 | infof(data, "schannel: failed to decrypt data, need more data\n");
|
---|
1409 | goto cleanup;
|
---|
1410 | }
|
---|
1411 | else {
|
---|
1412 | *err = CURLE_RECV_ERROR;
|
---|
1413 | infof(data, "schannel: failed to read data from server: %s\n",
|
---|
1414 | Curl_sspi_strerror(conn, sspi_status));
|
---|
1415 | goto cleanup;
|
---|
1416 | }
|
---|
1417 | }
|
---|
1418 |
|
---|
1419 | infof(data, "schannel: encrypted data buffer: offset %zu length %zu\n",
|
---|
1420 | BACKEND->encdata_offset, BACKEND->encdata_length);
|
---|
1421 |
|
---|
1422 | infof(data, "schannel: decrypted data buffer: offset %zu length %zu\n",
|
---|
1423 | BACKEND->decdata_offset, BACKEND->decdata_length);
|
---|
1424 |
|
---|
1425 | cleanup:
|
---|
1426 | /* Warning- there is no guarantee the encdata state is valid at this point */
|
---|
1427 | infof(data, "schannel: schannel_recv cleanup\n");
|
---|
1428 |
|
---|
1429 | /* Error if the connection has closed without a close_notify.
|
---|
1430 | Behavior here is a matter of debate. We don't want to be vulnerable to a
|
---|
1431 | truncation attack however there's some browser precedent for ignoring the
|
---|
1432 | close_notify for compatibility reasons.
|
---|
1433 | Additionally, Windows 2000 (v5.0) is a special case since it seems it doesn't
|
---|
1434 | return close_notify. In that case if the connection was closed we assume it
|
---|
1435 | was graceful (close_notify) since there doesn't seem to be a way to tell.
|
---|
1436 | */
|
---|
1437 | if(len && !BACKEND->decdata_offset && BACKEND->recv_connection_closed &&
|
---|
1438 | !BACKEND->recv_sspi_close_notify) {
|
---|
1439 | bool isWin2k = Curl_verify_windows_version(5, 0, PLATFORM_WINNT,
|
---|
1440 | VERSION_EQUAL);
|
---|
1441 |
|
---|
1442 | if(isWin2k && sspi_status == SEC_E_OK)
|
---|
1443 | BACKEND->recv_sspi_close_notify = true;
|
---|
1444 | else {
|
---|
1445 | *err = CURLE_RECV_ERROR;
|
---|
1446 | infof(data, "schannel: server closed abruptly (missing close_notify)\n");
|
---|
1447 | }
|
---|
1448 | }
|
---|
1449 |
|
---|
1450 | /* Any error other than CURLE_AGAIN is an unrecoverable error. */
|
---|
1451 | if(*err && *err != CURLE_AGAIN)
|
---|
1452 | BACKEND->recv_unrecoverable_err = *err;
|
---|
1453 |
|
---|
1454 | size = len < BACKEND->decdata_offset ? len : BACKEND->decdata_offset;
|
---|
1455 | if(size) {
|
---|
1456 | memcpy(buf, BACKEND->decdata_buffer, size);
|
---|
1457 | memmove(BACKEND->decdata_buffer, BACKEND->decdata_buffer + size,
|
---|
1458 | BACKEND->decdata_offset - size);
|
---|
1459 | BACKEND->decdata_offset -= size;
|
---|
1460 |
|
---|
1461 | infof(data, "schannel: decrypted data returned %zu\n", size);
|
---|
1462 | infof(data, "schannel: decrypted data buffer: offset %zu length %zu\n",
|
---|
1463 | BACKEND->decdata_offset, BACKEND->decdata_length);
|
---|
1464 | *err = CURLE_OK;
|
---|
1465 | return (ssize_t)size;
|
---|
1466 | }
|
---|
1467 |
|
---|
1468 | if(!*err && !BACKEND->recv_connection_closed)
|
---|
1469 | *err = CURLE_AGAIN;
|
---|
1470 |
|
---|
1471 | /* It's debatable what to return when !len. We could return whatever error we
|
---|
1472 | got from decryption but instead we override here so the return is consistent.
|
---|
1473 | */
|
---|
1474 | if(!len)
|
---|
1475 | *err = CURLE_OK;
|
---|
1476 |
|
---|
1477 | return *err ? -1 : 0;
|
---|
1478 | }
|
---|
1479 |
|
---|
1480 | static CURLcode Curl_schannel_connect_nonblocking(struct connectdata *conn,
|
---|
1481 | int sockindex, bool *done)
|
---|
1482 | {
|
---|
1483 | return schannel_connect_common(conn, sockindex, TRUE, done);
|
---|
1484 | }
|
---|
1485 |
|
---|
1486 | static CURLcode Curl_schannel_connect(struct connectdata *conn, int sockindex)
|
---|
1487 | {
|
---|
1488 | CURLcode result;
|
---|
1489 | bool done = FALSE;
|
---|
1490 |
|
---|
1491 | result = schannel_connect_common(conn, sockindex, FALSE, &done);
|
---|
1492 | if(result)
|
---|
1493 | return result;
|
---|
1494 |
|
---|
1495 | DEBUGASSERT(done);
|
---|
1496 |
|
---|
1497 | return CURLE_OK;
|
---|
1498 | }
|
---|
1499 |
|
---|
1500 | static bool Curl_schannel_data_pending(const struct connectdata *conn,
|
---|
1501 | int sockindex)
|
---|
1502 | {
|
---|
1503 | const struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
1504 |
|
---|
1505 | if(connssl->use) /* SSL/TLS is in use */
|
---|
1506 | return (BACKEND->decdata_offset > 0 ||
|
---|
1507 | (BACKEND->encdata_offset > 0 && !BACKEND->encdata_is_incomplete));
|
---|
1508 | else
|
---|
1509 | return FALSE;
|
---|
1510 | }
|
---|
1511 |
|
---|
1512 | static void Curl_schannel_close(struct connectdata *conn, int sockindex)
|
---|
1513 | {
|
---|
1514 | if(conn->ssl[sockindex].use)
|
---|
1515 | /* if the SSL/TLS channel hasn't been shut down yet, do that now. */
|
---|
1516 | Curl_ssl_shutdown(conn, sockindex);
|
---|
1517 | }
|
---|
1518 |
|
---|
1519 | static void Curl_schannel_session_free(void *ptr)
|
---|
1520 | {
|
---|
1521 | /* this is expected to be called under sessionid lock */
|
---|
1522 | struct curl_schannel_cred *cred = ptr;
|
---|
1523 |
|
---|
1524 | cred->refcount--;
|
---|
1525 | if(cred->refcount == 0) {
|
---|
1526 | s_pSecFn->FreeCredentialsHandle(&cred->cred_handle);
|
---|
1527 | Curl_safefree(cred);
|
---|
1528 | }
|
---|
1529 | }
|
---|
1530 |
|
---|
1531 | static int Curl_schannel_shutdown(struct connectdata *conn, int sockindex)
|
---|
1532 | {
|
---|
1533 | /* See https://msdn.microsoft.com/en-us/library/windows/desktop/aa380138.aspx
|
---|
1534 | * Shutting Down an Schannel Connection
|
---|
1535 | */
|
---|
1536 | struct Curl_easy *data = conn->data;
|
---|
1537 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
1538 | char * const hostname = SSL_IS_PROXY() ? conn->http_proxy.host.name :
|
---|
1539 | conn->host.name;
|
---|
1540 |
|
---|
1541 | infof(data, "schannel: shutting down SSL/TLS connection with %s port %hu\n",
|
---|
1542 | hostname, conn->remote_port);
|
---|
1543 |
|
---|
1544 | if(BACKEND->cred && BACKEND->ctxt) {
|
---|
1545 | SecBufferDesc BuffDesc;
|
---|
1546 | SecBuffer Buffer;
|
---|
1547 | SECURITY_STATUS sspi_status;
|
---|
1548 | SecBuffer outbuf;
|
---|
1549 | SecBufferDesc outbuf_desc;
|
---|
1550 | CURLcode result;
|
---|
1551 | TCHAR *host_name;
|
---|
1552 | DWORD dwshut = SCHANNEL_SHUTDOWN;
|
---|
1553 |
|
---|
1554 | InitSecBuffer(&Buffer, SECBUFFER_TOKEN, &dwshut, sizeof(dwshut));
|
---|
1555 | InitSecBufferDesc(&BuffDesc, &Buffer, 1);
|
---|
1556 |
|
---|
1557 | sspi_status = s_pSecFn->ApplyControlToken(&BACKEND->ctxt->ctxt_handle,
|
---|
1558 | &BuffDesc);
|
---|
1559 |
|
---|
1560 | if(sspi_status != SEC_E_OK)
|
---|
1561 | failf(data, "schannel: ApplyControlToken failure: %s",
|
---|
1562 | Curl_sspi_strerror(conn, sspi_status));
|
---|
1563 |
|
---|
1564 | host_name = Curl_convert_UTF8_to_tchar(hostname);
|
---|
1565 | if(!host_name)
|
---|
1566 | return CURLE_OUT_OF_MEMORY;
|
---|
1567 |
|
---|
1568 | /* setup output buffer */
|
---|
1569 | InitSecBuffer(&outbuf, SECBUFFER_EMPTY, NULL, 0);
|
---|
1570 | InitSecBufferDesc(&outbuf_desc, &outbuf, 1);
|
---|
1571 |
|
---|
1572 | sspi_status = s_pSecFn->InitializeSecurityContext(
|
---|
1573 | &BACKEND->cred->cred_handle,
|
---|
1574 | &BACKEND->ctxt->ctxt_handle,
|
---|
1575 | host_name,
|
---|
1576 | BACKEND->req_flags,
|
---|
1577 | 0,
|
---|
1578 | 0,
|
---|
1579 | NULL,
|
---|
1580 | 0,
|
---|
1581 | &BACKEND->ctxt->ctxt_handle,
|
---|
1582 | &outbuf_desc,
|
---|
1583 | &BACKEND->ret_flags,
|
---|
1584 | &BACKEND->ctxt->time_stamp);
|
---|
1585 |
|
---|
1586 | Curl_unicodefree(host_name);
|
---|
1587 |
|
---|
1588 | if((sspi_status == SEC_E_OK) || (sspi_status == SEC_I_CONTEXT_EXPIRED)) {
|
---|
1589 | /* send close message which is in output buffer */
|
---|
1590 | ssize_t written;
|
---|
1591 | result = Curl_write_plain(conn, conn->sock[sockindex], outbuf.pvBuffer,
|
---|
1592 | outbuf.cbBuffer, &written);
|
---|
1593 |
|
---|
1594 | s_pSecFn->FreeContextBuffer(outbuf.pvBuffer);
|
---|
1595 | if((result != CURLE_OK) || (outbuf.cbBuffer != (size_t) written)) {
|
---|
1596 | infof(data, "schannel: failed to send close msg: %s"
|
---|
1597 | " (bytes written: %zd)\n", curl_easy_strerror(result), written);
|
---|
1598 | }
|
---|
1599 | }
|
---|
1600 | }
|
---|
1601 |
|
---|
1602 | /* free SSPI Schannel API security context handle */
|
---|
1603 | if(BACKEND->ctxt) {
|
---|
1604 | infof(data, "schannel: clear security context handle\n");
|
---|
1605 | s_pSecFn->DeleteSecurityContext(&BACKEND->ctxt->ctxt_handle);
|
---|
1606 | Curl_safefree(BACKEND->ctxt);
|
---|
1607 | }
|
---|
1608 |
|
---|
1609 | /* free SSPI Schannel API credential handle */
|
---|
1610 | if(BACKEND->cred) {
|
---|
1611 | Curl_ssl_sessionid_lock(conn);
|
---|
1612 | Curl_schannel_session_free(BACKEND->cred);
|
---|
1613 | Curl_ssl_sessionid_unlock(conn);
|
---|
1614 | BACKEND->cred = NULL;
|
---|
1615 | }
|
---|
1616 |
|
---|
1617 | /* free internal buffer for received encrypted data */
|
---|
1618 | if(BACKEND->encdata_buffer != NULL) {
|
---|
1619 | Curl_safefree(BACKEND->encdata_buffer);
|
---|
1620 | BACKEND->encdata_length = 0;
|
---|
1621 | BACKEND->encdata_offset = 0;
|
---|
1622 | BACKEND->encdata_is_incomplete = false;
|
---|
1623 | }
|
---|
1624 |
|
---|
1625 | /* free internal buffer for received decrypted data */
|
---|
1626 | if(BACKEND->decdata_buffer != NULL) {
|
---|
1627 | Curl_safefree(BACKEND->decdata_buffer);
|
---|
1628 | BACKEND->decdata_length = 0;
|
---|
1629 | BACKEND->decdata_offset = 0;
|
---|
1630 | }
|
---|
1631 |
|
---|
1632 | return CURLE_OK;
|
---|
1633 | }
|
---|
1634 |
|
---|
1635 | static int Curl_schannel_init(void)
|
---|
1636 | {
|
---|
1637 | return (Curl_sspi_global_init() == CURLE_OK ? 1 : 0);
|
---|
1638 | }
|
---|
1639 |
|
---|
1640 | static void Curl_schannel_cleanup(void)
|
---|
1641 | {
|
---|
1642 | Curl_sspi_global_cleanup();
|
---|
1643 | }
|
---|
1644 |
|
---|
1645 | static size_t Curl_schannel_version(char *buffer, size_t size)
|
---|
1646 | {
|
---|
1647 | size = snprintf(buffer, size, "WinSSL");
|
---|
1648 |
|
---|
1649 | return size;
|
---|
1650 | }
|
---|
1651 |
|
---|
1652 | static CURLcode Curl_schannel_random(struct Curl_easy *data UNUSED_PARAM,
|
---|
1653 | unsigned char *entropy, size_t length)
|
---|
1654 | {
|
---|
1655 | HCRYPTPROV hCryptProv = 0;
|
---|
1656 |
|
---|
1657 | (void)data;
|
---|
1658 |
|
---|
1659 | if(!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL,
|
---|
1660 | CRYPT_VERIFYCONTEXT | CRYPT_SILENT))
|
---|
1661 | return CURLE_FAILED_INIT;
|
---|
1662 |
|
---|
1663 | if(!CryptGenRandom(hCryptProv, (DWORD)length, entropy)) {
|
---|
1664 | CryptReleaseContext(hCryptProv, 0UL);
|
---|
1665 | return CURLE_FAILED_INIT;
|
---|
1666 | }
|
---|
1667 |
|
---|
1668 | CryptReleaseContext(hCryptProv, 0UL);
|
---|
1669 | return CURLE_OK;
|
---|
1670 | }
|
---|
1671 |
|
---|
1672 | #ifdef _WIN32_WCE
|
---|
1673 | static CURLcode verify_certificate(struct connectdata *conn, int sockindex)
|
---|
1674 | {
|
---|
1675 | SECURITY_STATUS status;
|
---|
1676 | struct Curl_easy *data = conn->data;
|
---|
1677 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
1678 | CURLcode result = CURLE_OK;
|
---|
1679 | CERT_CONTEXT *pCertContextServer = NULL;
|
---|
1680 | const CERT_CHAIN_CONTEXT *pChainContext = NULL;
|
---|
1681 | const char * const conn_hostname = SSL_IS_PROXY() ?
|
---|
1682 | conn->http_proxy.host.name :
|
---|
1683 | conn->host.name;
|
---|
1684 |
|
---|
1685 | status = s_pSecFn->QueryContextAttributes(&BACKEND->ctxt->ctxt_handle,
|
---|
1686 | SECPKG_ATTR_REMOTE_CERT_CONTEXT,
|
---|
1687 | &pCertContextServer);
|
---|
1688 |
|
---|
1689 | if((status != SEC_E_OK) || (pCertContextServer == NULL)) {
|
---|
1690 | failf(data, "schannel: Failed to read remote certificate context: %s",
|
---|
1691 | Curl_sspi_strerror(conn, status));
|
---|
1692 | result = CURLE_PEER_FAILED_VERIFICATION;
|
---|
1693 | }
|
---|
1694 |
|
---|
1695 | if(result == CURLE_OK) {
|
---|
1696 | CERT_CHAIN_PARA ChainPara;
|
---|
1697 | memset(&ChainPara, 0, sizeof(ChainPara));
|
---|
1698 | ChainPara.cbSize = sizeof(ChainPara);
|
---|
1699 |
|
---|
1700 | if(!CertGetCertificateChain(NULL,
|
---|
1701 | pCertContextServer,
|
---|
1702 | NULL,
|
---|
1703 | pCertContextServer->hCertStore,
|
---|
1704 | &ChainPara,
|
---|
1705 | (data->set.ssl.no_revoke ? 0 :
|
---|
1706 | CERT_CHAIN_REVOCATION_CHECK_CHAIN),
|
---|
1707 | NULL,
|
---|
1708 | &pChainContext)) {
|
---|
1709 | failf(data, "schannel: CertGetCertificateChain failed: %s",
|
---|
1710 | Curl_sspi_strerror(conn, GetLastError()));
|
---|
1711 | pChainContext = NULL;
|
---|
1712 | result = CURLE_PEER_FAILED_VERIFICATION;
|
---|
1713 | }
|
---|
1714 |
|
---|
1715 | if(result == CURLE_OK) {
|
---|
1716 | CERT_SIMPLE_CHAIN *pSimpleChain = pChainContext->rgpChain[0];
|
---|
1717 | DWORD dwTrustErrorMask = ~(DWORD)(CERT_TRUST_IS_NOT_TIME_NESTED);
|
---|
1718 | dwTrustErrorMask &= pSimpleChain->TrustStatus.dwErrorStatus;
|
---|
1719 | if(dwTrustErrorMask) {
|
---|
1720 | if(dwTrustErrorMask & CERT_TRUST_IS_REVOKED)
|
---|
1721 | failf(data, "schannel: CertGetCertificateChain trust error"
|
---|
1722 | " CERT_TRUST_IS_REVOKED");
|
---|
1723 | else if(dwTrustErrorMask & CERT_TRUST_IS_PARTIAL_CHAIN)
|
---|
1724 | failf(data, "schannel: CertGetCertificateChain trust error"
|
---|
1725 | " CERT_TRUST_IS_PARTIAL_CHAIN");
|
---|
1726 | else if(dwTrustErrorMask & CERT_TRUST_IS_UNTRUSTED_ROOT)
|
---|
1727 | failf(data, "schannel: CertGetCertificateChain trust error"
|
---|
1728 | " CERT_TRUST_IS_UNTRUSTED_ROOT");
|
---|
1729 | else if(dwTrustErrorMask & CERT_TRUST_IS_NOT_TIME_VALID)
|
---|
1730 | failf(data, "schannel: CertGetCertificateChain trust error"
|
---|
1731 | " CERT_TRUST_IS_NOT_TIME_VALID");
|
---|
1732 | else
|
---|
1733 | failf(data, "schannel: CertGetCertificateChain error mask: 0x%08x",
|
---|
1734 | dwTrustErrorMask);
|
---|
1735 | result = CURLE_PEER_FAILED_VERIFICATION;
|
---|
1736 | }
|
---|
1737 | }
|
---|
1738 | }
|
---|
1739 |
|
---|
1740 | if(result == CURLE_OK) {
|
---|
1741 | if(conn->ssl_config.verifyhost) {
|
---|
1742 | TCHAR cert_hostname_buff[256];
|
---|
1743 | DWORD len;
|
---|
1744 |
|
---|
1745 | /* TODO: Fix this for certificates with multiple alternative names.
|
---|
1746 | Right now we're only asking for the first preferred alternative name.
|
---|
1747 | Instead we'd need to do all via CERT_NAME_SEARCH_ALL_NAMES_FLAG
|
---|
1748 | (if WinCE supports that?) and run this section in a loop for each.
|
---|
1749 | https://msdn.microsoft.com/en-us/library/windows/desktop/aa376086.aspx
|
---|
1750 | curl: (51) schannel: CertGetNameString() certificate hostname
|
---|
1751 | (.google.com) did not match connection (google.com)
|
---|
1752 | */
|
---|
1753 | len = CertGetNameString(pCertContextServer,
|
---|
1754 | CERT_NAME_DNS_TYPE,
|
---|
1755 | CERT_NAME_DISABLE_IE4_UTF8_FLAG,
|
---|
1756 | NULL,
|
---|
1757 | cert_hostname_buff,
|
---|
1758 | 256);
|
---|
1759 | if(len > 0) {
|
---|
1760 | const char *cert_hostname;
|
---|
1761 |
|
---|
1762 | /* Comparing the cert name and the connection hostname encoded as UTF-8
|
---|
1763 | * is acceptable since both values are assumed to use ASCII
|
---|
1764 | * (or some equivalent) encoding
|
---|
1765 | */
|
---|
1766 | cert_hostname = Curl_convert_tchar_to_UTF8(cert_hostname_buff);
|
---|
1767 | if(!cert_hostname) {
|
---|
1768 | result = CURLE_OUT_OF_MEMORY;
|
---|
1769 | }
|
---|
1770 | else{
|
---|
1771 | int match_result;
|
---|
1772 |
|
---|
1773 | match_result = Curl_cert_hostcheck(cert_hostname, conn->host.name);
|
---|
1774 | if(match_result == CURL_HOST_MATCH) {
|
---|
1775 | infof(data,
|
---|
1776 | "schannel: connection hostname (%s) validated "
|
---|
1777 | "against certificate name (%s)\n",
|
---|
1778 | conn->host.name,
|
---|
1779 | cert_hostname);
|
---|
1780 | result = CURLE_OK;
|
---|
1781 | }
|
---|
1782 | else{
|
---|
1783 | failf(data,
|
---|
1784 | "schannel: connection hostname (%s) "
|
---|
1785 | "does not match certificate name (%s)",
|
---|
1786 | conn->host.name,
|
---|
1787 | cert_hostname);
|
---|
1788 | result = CURLE_PEER_FAILED_VERIFICATION;
|
---|
1789 | }
|
---|
1790 | Curl_unicodefree(cert_hostname);
|
---|
1791 | }
|
---|
1792 | }
|
---|
1793 | else {
|
---|
1794 | failf(data,
|
---|
1795 | "schannel: CertGetNameString did not provide any "
|
---|
1796 | "certificate name information");
|
---|
1797 | result = CURLE_PEER_FAILED_VERIFICATION;
|
---|
1798 | }
|
---|
1799 | }
|
---|
1800 | }
|
---|
1801 |
|
---|
1802 | if(pChainContext)
|
---|
1803 | CertFreeCertificateChain(pChainContext);
|
---|
1804 |
|
---|
1805 | if(pCertContextServer)
|
---|
1806 | CertFreeCertificateContext(pCertContextServer);
|
---|
1807 |
|
---|
1808 | return result;
|
---|
1809 | }
|
---|
1810 | #endif /* _WIN32_WCE */
|
---|
1811 |
|
---|
1812 | static void *Curl_schannel_get_internals(struct ssl_connect_data *connssl,
|
---|
1813 | CURLINFO info UNUSED_PARAM)
|
---|
1814 | {
|
---|
1815 | (void)info;
|
---|
1816 | return &BACKEND->ctxt->ctxt_handle;
|
---|
1817 | }
|
---|
1818 |
|
---|
1819 | const struct Curl_ssl Curl_ssl_schannel = {
|
---|
1820 | { CURLSSLBACKEND_SCHANNEL, "schannel" }, /* info */
|
---|
1821 |
|
---|
1822 | 0, /* have_ca_path */
|
---|
1823 | 1, /* have_certinfo */
|
---|
1824 | 0, /* have_pinnedpubkey */
|
---|
1825 | 0, /* have_ssl_ctx */
|
---|
1826 | 0, /* support_https_proxy */
|
---|
1827 |
|
---|
1828 | sizeof(struct ssl_backend_data),
|
---|
1829 |
|
---|
1830 | Curl_schannel_init, /* init */
|
---|
1831 | Curl_schannel_cleanup, /* cleanup */
|
---|
1832 | Curl_schannel_version, /* version */
|
---|
1833 | Curl_none_check_cxn, /* check_cxn */
|
---|
1834 | Curl_schannel_shutdown, /* shutdown */
|
---|
1835 | Curl_schannel_data_pending, /* data_pending */
|
---|
1836 | Curl_schannel_random, /* random */
|
---|
1837 | Curl_none_cert_status_request, /* cert_status_request */
|
---|
1838 | Curl_schannel_connect, /* connect */
|
---|
1839 | Curl_schannel_connect_nonblocking, /* connect_nonblocking */
|
---|
1840 | Curl_schannel_get_internals, /* get_internals */
|
---|
1841 | Curl_schannel_close, /* close_one */
|
---|
1842 | Curl_none_close_all, /* close_all */
|
---|
1843 | Curl_schannel_session_free, /* session_free */
|
---|
1844 | Curl_none_set_engine, /* set_engine */
|
---|
1845 | Curl_none_set_engine_default, /* set_engine_default */
|
---|
1846 | Curl_none_engines_list, /* engines_list */
|
---|
1847 | Curl_none_false_start, /* false_start */
|
---|
1848 | Curl_none_md5sum, /* md5sum */
|
---|
1849 | NULL /* sha256sum */
|
---|
1850 | };
|
---|
1851 |
|
---|
1852 | #endif /* USE_SCHANNEL */
|
---|