Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * _ _ ____ _ |
| 3 | * Project ___| | | | _ \| | |
| 4 | * / __| | | | |_) | | |
| 5 | * | (__| |_| | _ <| |___ |
| 6 | * \___|\___/|_| \_\_____| |
| 7 | * |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 8 | * Copyright (C) 2012 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al. |
| 9 | * Copyright (C) 2009, 2011, Markus Moeller, <markus_moeller@compuserve.com> |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 10 | * |
| 11 | * This software is licensed as described in the file COPYING, which |
| 12 | * you should have received as part of this distribution. The terms |
| 13 | * are also available at http://curl.haxx.se/docs/copyright.html. |
| 14 | * |
| 15 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| 16 | * copies of the Software, and permit persons to whom the Software is |
| 17 | * furnished to do so, under the terms of the COPYING file. |
| 18 | * |
| 19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| 20 | * KIND, either express or implied. |
| 21 | * |
| 22 | ***************************************************************************/ |
| 23 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 24 | #include "curl_setup.h" |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 25 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 26 | #if defined(USE_WINDOWS_SSPI) && !defined(CURL_DISABLE_PROXY) |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 27 | |
| 28 | #include "urldata.h" |
| 29 | #include "sendf.h" |
| 30 | #include "connect.h" |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 31 | #include "strerror.h" |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 32 | #include "timeval.h" |
| 33 | #include "socks.h" |
| 34 | #include "curl_sspi.h" |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 35 | #include "curl_multibyte.h" |
| 36 | #include "warnless.h" |
| 37 | #include "curl_printf.h" |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 38 | #include "curl_memory.h" |
| 39 | /* The last #include file should be: */ |
| 40 | #include "memdebug.h" |
| 41 | |
| 42 | /* |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 43 | * Helper sspi error functions. |
| 44 | */ |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 45 | static int check_sspi_err(struct connectdata *conn, |
| 46 | SECURITY_STATUS status, |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 47 | const char* function) |
| 48 | { |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 49 | if(status != SEC_E_OK && |
| 50 | status != SEC_I_COMPLETE_AND_CONTINUE && |
| 51 | status != SEC_I_COMPLETE_NEEDED && |
| 52 | status != SEC_I_CONTINUE_NEEDED) { |
| 53 | failf(conn->data, "SSPI error: %s failed: %s", function, |
| 54 | Curl_sspi_strerror(conn, status)); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 55 | return 1; |
| 56 | } |
| 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | /* This is the SSPI-using version of this function */ |
| 61 | CURLcode Curl_SOCKS5_gssapi_negotiate(int sockindex, |
| 62 | struct connectdata *conn) |
| 63 | { |
| 64 | struct SessionHandle *data = conn->data; |
| 65 | curl_socket_t sock = conn->sock[sockindex]; |
| 66 | CURLcode code; |
| 67 | ssize_t actualread; |
| 68 | ssize_t written; |
| 69 | int result; |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 70 | /* Needs GSS-API authentication */ |
| 71 | SECURITY_STATUS status; |
| 72 | unsigned long sspi_ret_flags = 0; |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 73 | int gss_enc; |
| 74 | SecBuffer sspi_send_token, sspi_recv_token, sspi_w_token[3]; |
| 75 | SecBufferDesc input_desc, output_desc, wrap_desc; |
| 76 | SecPkgContext_Sizes sspi_sizes; |
| 77 | CredHandle cred_handle; |
| 78 | CtxtHandle sspi_context; |
| 79 | PCtxtHandle context_handle = NULL; |
| 80 | SecPkgCredentials_Names names; |
| 81 | TimeStamp expiry; |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 82 | char *service_name = NULL; |
| 83 | unsigned short us_length; |
| 84 | unsigned long qop; |
| 85 | unsigned char socksreq[4]; /* room for GSS-API exchange header only */ |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 86 | char *service = data->set.str[STRING_SOCKS5_GSSAPI_SERVICE]; |
| 87 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 88 | /* GSS-API request looks like |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 89 | * +----+------+-----+----------------+ |
| 90 | * |VER | MTYP | LEN | TOKEN | |
| 91 | * +----+------+----------------------+ |
| 92 | * | 1 | 1 | 2 | up to 2^16 - 1 | |
| 93 | * +----+------+-----+----------------+ |
| 94 | */ |
| 95 | |
| 96 | /* prepare service name */ |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 97 | if(strchr(service, '/')) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 98 | service_name = malloc(strlen(service)); |
| 99 | if(!service_name) |
| 100 | return CURLE_OUT_OF_MEMORY; |
| 101 | memcpy(service_name, service, strlen(service)); |
| 102 | } |
| 103 | else { |
| 104 | service_name = malloc(strlen(service) + strlen(conn->proxy.name) + 2); |
| 105 | if(!service_name) |
| 106 | return CURLE_OUT_OF_MEMORY; |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 107 | snprintf(service_name, strlen(service) +strlen(conn->proxy.name)+2, |
| 108 | "%s/%s", service, conn->proxy.name); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | input_desc.cBuffers = 1; |
| 112 | input_desc.pBuffers = &sspi_recv_token; |
| 113 | input_desc.ulVersion = SECBUFFER_VERSION; |
| 114 | |
| 115 | sspi_recv_token.BufferType = SECBUFFER_TOKEN; |
| 116 | sspi_recv_token.cbBuffer = 0; |
| 117 | sspi_recv_token.pvBuffer = NULL; |
| 118 | |
| 119 | output_desc.cBuffers = 1; |
| 120 | output_desc.pBuffers = &sspi_send_token; |
| 121 | output_desc.ulVersion = SECBUFFER_VERSION; |
| 122 | |
| 123 | sspi_send_token.BufferType = SECBUFFER_TOKEN; |
| 124 | sspi_send_token.cbBuffer = 0; |
| 125 | sspi_send_token.pvBuffer = NULL; |
| 126 | |
| 127 | wrap_desc.cBuffers = 3; |
| 128 | wrap_desc.pBuffers = sspi_w_token; |
| 129 | wrap_desc.ulVersion = SECBUFFER_VERSION; |
| 130 | |
| 131 | cred_handle.dwLower = 0; |
| 132 | cred_handle.dwUpper = 0; |
| 133 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 134 | status = s_pSecFn->AcquireCredentialsHandle(NULL, |
| 135 | (TCHAR *) TEXT("Kerberos"), |
| 136 | SECPKG_CRED_OUTBOUND, |
| 137 | NULL, |
| 138 | NULL, |
| 139 | NULL, |
| 140 | NULL, |
| 141 | &cred_handle, |
| 142 | &expiry); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 143 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 144 | if(check_sspi_err(conn, status, "AcquireCredentialsHandle")) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 145 | failf(data, "Failed to acquire credentials."); |
| 146 | free(service_name); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 147 | s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| 148 | return CURLE_COULDNT_CONNECT; |
| 149 | } |
| 150 | |
| 151 | /* As long as we need to keep sending some context info, and there's no */ |
| 152 | /* errors, keep sending it... */ |
| 153 | for(;;) { |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 154 | TCHAR *sname; |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 155 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 156 | sname = Curl_convert_UTF8_to_tchar(service_name); |
| 157 | if(!sname) |
| 158 | return CURLE_OUT_OF_MEMORY; |
| 159 | |
| 160 | status = s_pSecFn->InitializeSecurityContext(&cred_handle, |
| 161 | context_handle, |
| 162 | sname, |
| 163 | ISC_REQ_MUTUAL_AUTH | |
| 164 | ISC_REQ_ALLOCATE_MEMORY | |
| 165 | ISC_REQ_CONFIDENTIALITY | |
| 166 | ISC_REQ_REPLAY_DETECT, |
| 167 | 0, |
| 168 | SECURITY_NATIVE_DREP, |
| 169 | &input_desc, |
| 170 | 0, |
| 171 | &sspi_context, |
| 172 | &output_desc, |
| 173 | &sspi_ret_flags, |
| 174 | &expiry); |
| 175 | |
| 176 | Curl_unicodefree(sname); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 177 | |
| 178 | if(sspi_recv_token.pvBuffer) { |
| 179 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| 180 | sspi_recv_token.pvBuffer = NULL; |
| 181 | sspi_recv_token.cbBuffer = 0; |
| 182 | } |
| 183 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 184 | if(check_sspi_err(conn, status, "InitializeSecurityContext")) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 185 | free(service_name); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 186 | s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| 187 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 188 | if(sspi_recv_token.pvBuffer) |
| 189 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 190 | failf(data, "Failed to initialise security context."); |
| 191 | return CURLE_COULDNT_CONNECT; |
| 192 | } |
| 193 | |
| 194 | if(sspi_send_token.cbBuffer != 0) { |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 195 | socksreq[0] = 1; /* GSS-API subnegotiation version */ |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 196 | socksreq[1] = 1; /* authentication message type */ |
| 197 | us_length = htons((short)sspi_send_token.cbBuffer); |
| 198 | memcpy(socksreq+2, &us_length, sizeof(short)); |
| 199 | |
| 200 | code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 201 | if(code || (4 != written)) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 202 | failf(data, "Failed to send SSPI authentication request."); |
| 203 | free(service_name); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 204 | if(sspi_send_token.pvBuffer) |
| 205 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| 206 | if(sspi_recv_token.pvBuffer) |
| 207 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 208 | s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| 209 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 210 | return CURLE_COULDNT_CONNECT; |
| 211 | } |
| 212 | |
| 213 | code = Curl_write_plain(conn, sock, (char *)sspi_send_token.pvBuffer, |
| 214 | sspi_send_token.cbBuffer, &written); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 215 | if(code || (sspi_send_token.cbBuffer != (size_t)written)) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 216 | failf(data, "Failed to send SSPI authentication token."); |
| 217 | free(service_name); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 218 | if(sspi_send_token.pvBuffer) |
| 219 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| 220 | if(sspi_recv_token.pvBuffer) |
| 221 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 222 | s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| 223 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 224 | return CURLE_COULDNT_CONNECT; |
| 225 | } |
| 226 | |
| 227 | } |
| 228 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 229 | if(sspi_send_token.pvBuffer) { |
| 230 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
| 231 | sspi_send_token.pvBuffer = NULL; |
| 232 | } |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 233 | sspi_send_token.cbBuffer = 0; |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 234 | |
| 235 | if(sspi_recv_token.pvBuffer) { |
| 236 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
| 237 | sspi_recv_token.pvBuffer = NULL; |
| 238 | } |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 239 | sspi_recv_token.cbBuffer = 0; |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 240 | |
| 241 | if(status != SEC_I_CONTINUE_NEEDED) |
| 242 | break; |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 243 | |
| 244 | /* analyse response */ |
| 245 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 246 | /* GSS-API response looks like |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 247 | * +----+------+-----+----------------+ |
| 248 | * |VER | MTYP | LEN | TOKEN | |
| 249 | * +----+------+----------------------+ |
| 250 | * | 1 | 1 | 2 | up to 2^16 - 1 | |
| 251 | * +----+------+-----+----------------+ |
| 252 | */ |
| 253 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 254 | result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread); |
| 255 | if(result || (actualread != 4)) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 256 | failf(data, "Failed to receive SSPI authentication response."); |
| 257 | free(service_name); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 258 | s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| 259 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 260 | return CURLE_COULDNT_CONNECT; |
| 261 | } |
| 262 | |
| 263 | /* ignore the first (VER) byte */ |
| 264 | if(socksreq[1] == 255) { /* status / message type */ |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 265 | failf(data, "User was rejected by the SOCKS5 server (%u %u).", |
| 266 | (unsigned int)socksreq[0], (unsigned int)socksreq[1]); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 267 | free(service_name); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 268 | s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| 269 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 270 | return CURLE_COULDNT_CONNECT; |
| 271 | } |
| 272 | |
| 273 | if(socksreq[1] != 1) { /* status / messgae type */ |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 274 | failf(data, "Invalid SSPI authentication response type (%u %u).", |
| 275 | (unsigned int)socksreq[0], (unsigned int)socksreq[1]); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 276 | free(service_name); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 277 | s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| 278 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 279 | return CURLE_COULDNT_CONNECT; |
| 280 | } |
| 281 | |
| 282 | memcpy(&us_length, socksreq+2, sizeof(short)); |
| 283 | us_length = ntohs(us_length); |
| 284 | |
| 285 | sspi_recv_token.cbBuffer = us_length; |
| 286 | sspi_recv_token.pvBuffer = malloc(us_length); |
| 287 | |
| 288 | if(!sspi_recv_token.pvBuffer) { |
| 289 | free(service_name); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 290 | s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| 291 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 292 | return CURLE_OUT_OF_MEMORY; |
| 293 | } |
| 294 | result = Curl_blockread_all(conn, sock, (char *)sspi_recv_token.pvBuffer, |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 295 | sspi_recv_token.cbBuffer, &actualread); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 296 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 297 | if(result || (actualread != us_length)) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 298 | failf(data, "Failed to receive SSPI authentication token."); |
| 299 | free(service_name); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 300 | if(sspi_recv_token.pvBuffer) |
| 301 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 302 | s_pSecFn->FreeCredentialsHandle(&cred_handle); |
| 303 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 304 | return CURLE_COULDNT_CONNECT; |
| 305 | } |
| 306 | |
| 307 | context_handle = &sspi_context; |
| 308 | } |
| 309 | |
| 310 | free(service_name); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 311 | |
| 312 | /* Everything is good so far, user was authenticated! */ |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 313 | status = s_pSecFn->QueryCredentialsAttributes(&cred_handle, |
| 314 | SECPKG_CRED_ATTR_NAMES, |
| 315 | &names); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 316 | s_pSecFn->FreeCredentialsHandle(&cred_handle); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 317 | if(check_sspi_err(conn, status, "QueryCredentialAttributes")) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 318 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 319 | s_pSecFn->FreeContextBuffer(names.sUserName); |
| 320 | failf(data, "Failed to determine user name."); |
| 321 | return CURLE_COULDNT_CONNECT; |
| 322 | } |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 323 | infof(data, "SOCKS5 server authencticated user %s with GSS-API.\n", |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 324 | names.sUserName); |
| 325 | s_pSecFn->FreeContextBuffer(names.sUserName); |
| 326 | |
| 327 | /* Do encryption */ |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 328 | socksreq[0] = 1; /* GSS-API subnegotiation version */ |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 329 | socksreq[1] = 2; /* encryption message type */ |
| 330 | |
| 331 | gss_enc = 0; /* no data protection */ |
| 332 | /* do confidentiality protection if supported */ |
| 333 | if(sspi_ret_flags & ISC_REQ_CONFIDENTIALITY) |
| 334 | gss_enc = 2; |
| 335 | /* else do integrity protection */ |
| 336 | else if(sspi_ret_flags & ISC_REQ_INTEGRITY) |
| 337 | gss_enc = 1; |
| 338 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 339 | infof(data, "SOCKS5 server supports GSS-API %s data protection.\n", |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 340 | (gss_enc==0)?"no":((gss_enc==1)?"integrity":"confidentiality") ); |
| 341 | /* force to no data protection, avoid encryption/decryption for now */ |
| 342 | gss_enc = 0; |
| 343 | /* |
| 344 | * Sending the encryption type in clear seems wrong. It should be |
| 345 | * protected with gss_seal()/gss_wrap(). See RFC1961 extract below |
| 346 | * The NEC reference implementations on which this is based is |
| 347 | * therefore at fault |
| 348 | * |
| 349 | * +------+------+------+.......................+ |
| 350 | * + ver | mtyp | len | token | |
| 351 | * +------+------+------+.......................+ |
| 352 | * + 0x01 | 0x02 | 0x02 | up to 2^16 - 1 octets | |
| 353 | * +------+------+------+.......................+ |
| 354 | * |
| 355 | * Where: |
| 356 | * |
| 357 | * - "ver" is the protocol version number, here 1 to represent the |
| 358 | * first version of the SOCKS/GSS-API protocol |
| 359 | * |
| 360 | * - "mtyp" is the message type, here 2 to represent a protection |
| 361 | * -level negotiation message |
| 362 | * |
| 363 | * - "len" is the length of the "token" field in octets |
| 364 | * |
| 365 | * - "token" is the GSS-API encapsulated protection level |
| 366 | * |
| 367 | * The token is produced by encapsulating an octet containing the |
| 368 | * required protection level using gss_seal()/gss_wrap() with conf_req |
| 369 | * set to FALSE. The token is verified using gss_unseal()/ |
| 370 | * gss_unwrap(). |
| 371 | * |
| 372 | */ |
| 373 | |
| 374 | if(data->set.socks5_gssapi_nec) { |
| 375 | us_length = htons((short)1); |
| 376 | memcpy(socksreq+2, &us_length, sizeof(short)); |
| 377 | } |
| 378 | else { |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 379 | status = s_pSecFn->QueryContextAttributes(&sspi_context, |
| 380 | SECPKG_ATTR_SIZES, |
| 381 | &sspi_sizes); |
| 382 | if(check_sspi_err(conn, status, "QueryContextAttributes")) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 383 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 384 | failf(data, "Failed to query security context attributes."); |
| 385 | return CURLE_COULDNT_CONNECT; |
| 386 | } |
| 387 | |
| 388 | sspi_w_token[0].cbBuffer = sspi_sizes.cbSecurityTrailer; |
| 389 | sspi_w_token[0].BufferType = SECBUFFER_TOKEN; |
| 390 | sspi_w_token[0].pvBuffer = malloc(sspi_sizes.cbSecurityTrailer); |
| 391 | |
| 392 | if(!sspi_w_token[0].pvBuffer) { |
| 393 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 394 | return CURLE_OUT_OF_MEMORY; |
| 395 | } |
| 396 | |
| 397 | sspi_w_token[1].cbBuffer = 1; |
| 398 | sspi_w_token[1].pvBuffer = malloc(1); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 399 | if(!sspi_w_token[1].pvBuffer) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 400 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 401 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 402 | return CURLE_OUT_OF_MEMORY; |
| 403 | } |
| 404 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 405 | memcpy(sspi_w_token[1].pvBuffer, &gss_enc, 1); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 406 | sspi_w_token[2].BufferType = SECBUFFER_PADDING; |
| 407 | sspi_w_token[2].cbBuffer = sspi_sizes.cbBlockSize; |
| 408 | sspi_w_token[2].pvBuffer = malloc(sspi_sizes.cbBlockSize); |
| 409 | if(!sspi_w_token[2].pvBuffer) { |
| 410 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 411 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| 412 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 413 | return CURLE_OUT_OF_MEMORY; |
| 414 | } |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 415 | status = s_pSecFn->EncryptMessage(&sspi_context, |
| 416 | KERB_WRAP_NO_ENCRYPT, |
| 417 | &wrap_desc, |
| 418 | 0); |
| 419 | if(check_sspi_err(conn, status, "EncryptMessage")) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 420 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 421 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| 422 | s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer); |
| 423 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 424 | failf(data, "Failed to query security context attributes."); |
| 425 | return CURLE_COULDNT_CONNECT; |
| 426 | } |
| 427 | sspi_send_token.cbBuffer = sspi_w_token[0].cbBuffer |
| 428 | + sspi_w_token[1].cbBuffer |
| 429 | + sspi_w_token[2].cbBuffer; |
| 430 | sspi_send_token.pvBuffer = malloc(sspi_send_token.cbBuffer); |
| 431 | if(!sspi_send_token.pvBuffer) { |
| 432 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 433 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| 434 | s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer); |
| 435 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 436 | return CURLE_OUT_OF_MEMORY; |
| 437 | } |
| 438 | |
| 439 | memcpy(sspi_send_token.pvBuffer, sspi_w_token[0].pvBuffer, |
| 440 | sspi_w_token[0].cbBuffer); |
| 441 | memcpy((PUCHAR) sspi_send_token.pvBuffer +(int)sspi_w_token[0].cbBuffer, |
| 442 | sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer); |
| 443 | memcpy((PUCHAR) sspi_send_token.pvBuffer |
| 444 | +sspi_w_token[0].cbBuffer |
| 445 | +sspi_w_token[1].cbBuffer, |
| 446 | sspi_w_token[2].pvBuffer, sspi_w_token[2].cbBuffer); |
| 447 | |
| 448 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 449 | sspi_w_token[0].pvBuffer = NULL; |
| 450 | sspi_w_token[0].cbBuffer = 0; |
| 451 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
| 452 | sspi_w_token[1].pvBuffer = NULL; |
| 453 | sspi_w_token[1].cbBuffer = 0; |
| 454 | s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer); |
| 455 | sspi_w_token[2].pvBuffer = NULL; |
| 456 | sspi_w_token[2].cbBuffer = 0; |
| 457 | |
| 458 | us_length = htons((short)sspi_send_token.cbBuffer); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 459 | memcpy(socksreq+2, &us_length, sizeof(short)); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 460 | } |
| 461 | |
| 462 | code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 463 | if(code || (4 != written)) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 464 | failf(data, "Failed to send SSPI encryption request."); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 465 | if(sspi_send_token.pvBuffer) |
| 466 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 467 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 468 | return CURLE_COULDNT_CONNECT; |
| 469 | } |
| 470 | |
| 471 | if(data->set.socks5_gssapi_nec) { |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 472 | memcpy(socksreq, &gss_enc, 1); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 473 | code = Curl_write_plain(conn, sock, (char *)socksreq, 1, &written); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 474 | if(code || (1 != written)) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 475 | failf(data, "Failed to send SSPI encryption type."); |
| 476 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 477 | return CURLE_COULDNT_CONNECT; |
| 478 | } |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 479 | } |
| 480 | else { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 481 | code = Curl_write_plain(conn, sock, (char *)sspi_send_token.pvBuffer, |
| 482 | sspi_send_token.cbBuffer, &written); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 483 | if(code || (sspi_send_token.cbBuffer != (size_t)written)) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 484 | failf(data, "Failed to send SSPI encryption type."); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 485 | if(sspi_send_token.pvBuffer) |
| 486 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 487 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 488 | return CURLE_COULDNT_CONNECT; |
| 489 | } |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 490 | if(sspi_send_token.pvBuffer) |
| 491 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 492 | } |
| 493 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 494 | result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread); |
| 495 | if(result || (actualread != 4)) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 496 | failf(data, "Failed to receive SSPI encryption response."); |
| 497 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 498 | return CURLE_COULDNT_CONNECT; |
| 499 | } |
| 500 | |
| 501 | /* ignore the first (VER) byte */ |
| 502 | if(socksreq[1] == 255) { /* status / message type */ |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 503 | failf(data, "User was rejected by the SOCKS5 server (%u %u).", |
| 504 | (unsigned int)socksreq[0], (unsigned int)socksreq[1]); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 505 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 506 | return CURLE_COULDNT_CONNECT; |
| 507 | } |
| 508 | |
| 509 | if(socksreq[1] != 2) { /* status / message type */ |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 510 | failf(data, "Invalid SSPI encryption response type (%u %u).", |
| 511 | (unsigned int)socksreq[0], (unsigned int)socksreq[1]); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 512 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 513 | return CURLE_COULDNT_CONNECT; |
| 514 | } |
| 515 | |
| 516 | memcpy(&us_length, socksreq+2, sizeof(short)); |
| 517 | us_length = ntohs(us_length); |
| 518 | |
| 519 | sspi_w_token[0].cbBuffer = us_length; |
| 520 | sspi_w_token[0].pvBuffer = malloc(us_length); |
| 521 | if(!sspi_w_token[0].pvBuffer) { |
| 522 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 523 | return CURLE_OUT_OF_MEMORY; |
| 524 | } |
| 525 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 526 | result = Curl_blockread_all(conn, sock, (char *)sspi_w_token[0].pvBuffer, |
| 527 | sspi_w_token[0].cbBuffer, &actualread); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 528 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 529 | if(result || (actualread != us_length)) { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 530 | failf(data, "Failed to receive SSPI encryption type."); |
| 531 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 532 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 533 | return CURLE_COULDNT_CONNECT; |
| 534 | } |
| 535 | |
| 536 | |
| 537 | if(!data->set.socks5_gssapi_nec) { |
| 538 | wrap_desc.cBuffers = 2; |
| 539 | sspi_w_token[0].BufferType = SECBUFFER_STREAM; |
| 540 | sspi_w_token[1].BufferType = SECBUFFER_DATA; |
| 541 | sspi_w_token[1].cbBuffer = 0; |
| 542 | sspi_w_token[1].pvBuffer = NULL; |
| 543 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 544 | status = s_pSecFn->DecryptMessage(&sspi_context, |
| 545 | &wrap_desc, |
| 546 | 0, |
| 547 | &qop); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 548 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 549 | if(check_sspi_err(conn, status, "DecryptMessage")) { |
| 550 | if(sspi_w_token[0].pvBuffer) |
| 551 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 552 | if(sspi_w_token[1].pvBuffer) |
| 553 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 554 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 555 | failf(data, "Failed to query security context attributes."); |
| 556 | return CURLE_COULDNT_CONNECT; |
| 557 | } |
| 558 | |
| 559 | if(sspi_w_token[1].cbBuffer != 1) { |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 560 | failf(data, "Invalid SSPI encryption response length (%lu).", |
| 561 | (unsigned long)sspi_w_token[1].cbBuffer); |
| 562 | if(sspi_w_token[0].pvBuffer) |
| 563 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 564 | if(sspi_w_token[1].pvBuffer) |
| 565 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 566 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 567 | return CURLE_COULDNT_CONNECT; |
| 568 | } |
| 569 | |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 570 | memcpy(socksreq, sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 571 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 572 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer); |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 573 | } |
| 574 | else { |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 575 | if(sspi_w_token[0].cbBuffer != 1) { |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 576 | failf(data, "Invalid SSPI encryption response length (%lu).", |
| 577 | (unsigned long)sspi_w_token[0].cbBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 578 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 579 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 580 | return CURLE_COULDNT_CONNECT; |
| 581 | } |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 582 | memcpy(socksreq, sspi_w_token[0].pvBuffer, sspi_w_token[0].cbBuffer); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 583 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer); |
| 584 | } |
| 585 | |
| 586 | infof(data, "SOCKS5 access with%s protection granted.\n", |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 587 | (socksreq[0]==0)?"out GSS-API data": |
| 588 | ((socksreq[0]==1)?" GSS-API integrity":" GSS-API confidentiality")); |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 589 | |
| 590 | /* For later use if encryption is required |
| 591 | conn->socks5_gssapi_enctype = socksreq[0]; |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 592 | if(socksreq[0] != 0) |
| 593 | conn->socks5_sspi_context = sspi_context; |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 594 | else { |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame^] | 595 | s_pSecFn->DeleteSecurityContext(&sspi_context); |
| 596 | conn->socks5_sspi_context = sspi_context; |
Kristian Monsen | 5ab5018 | 2010-05-14 18:53:44 +0100 | [diff] [blame] | 597 | } |
| 598 | */ |
| 599 | return CURLE_OK; |
| 600 | } |
| 601 | #endif |