[337] | 1 | /***************************************************************************
|
---|
| 2 | * _ _ ____ _
|
---|
| 3 | * Project ___| | | | _ \| |
|
---|
| 4 | * / __| | | | |_) | |
|
---|
| 5 | * | (__| |_| | _ <| |___
|
---|
| 6 | * \___|\___/|_| \_\_____|
|
---|
| 7 | *
|
---|
| 8 | * Copyright (C) 2012 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
|
---|
| 9 | * Copyright (C) 2009, 2011, Markus Moeller, <markus_moeller@compuserve.com>
|
---|
| 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 https://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 |
|
---|
| 24 | #include "curl_setup.h"
|
---|
| 25 |
|
---|
| 26 | #if defined(USE_WINDOWS_SSPI) && !defined(CURL_DISABLE_PROXY)
|
---|
| 27 |
|
---|
| 28 | #include "urldata.h"
|
---|
| 29 | #include "sendf.h"
|
---|
| 30 | #include "connect.h"
|
---|
| 31 | #include "strerror.h"
|
---|
| 32 | #include "timeval.h"
|
---|
| 33 | #include "socks.h"
|
---|
| 34 | #include "curl_sspi.h"
|
---|
| 35 | #include "curl_multibyte.h"
|
---|
| 36 | #include "warnless.h"
|
---|
| 37 | #include "strdup.h"
|
---|
| 38 | /* The last 3 #include files should be in this order */
|
---|
| 39 | #include "curl_printf.h"
|
---|
| 40 | #include "curl_memory.h"
|
---|
| 41 | #include "memdebug.h"
|
---|
| 42 |
|
---|
| 43 | /*
|
---|
| 44 | * Helper sspi error functions.
|
---|
| 45 | */
|
---|
| 46 | static int check_sspi_err(struct connectdata *conn,
|
---|
| 47 | SECURITY_STATUS status,
|
---|
| 48 | const char *function)
|
---|
| 49 | {
|
---|
| 50 | if(status != SEC_E_OK &&
|
---|
| 51 | status != SEC_I_COMPLETE_AND_CONTINUE &&
|
---|
| 52 | status != SEC_I_COMPLETE_NEEDED &&
|
---|
| 53 | status != SEC_I_CONTINUE_NEEDED) {
|
---|
| 54 | failf(conn->data, "SSPI error: %s failed: %s", function,
|
---|
| 55 | Curl_sspi_strerror(conn, status));
|
---|
| 56 | return 1;
|
---|
| 57 | }
|
---|
| 58 | return 0;
|
---|
| 59 | }
|
---|
| 60 |
|
---|
| 61 | /* This is the SSPI-using version of this function */
|
---|
| 62 | CURLcode Curl_SOCKS5_gssapi_negotiate(int sockindex,
|
---|
| 63 | struct connectdata *conn)
|
---|
| 64 | {
|
---|
| 65 | struct Curl_easy *data = conn->data;
|
---|
| 66 | curl_socket_t sock = conn->sock[sockindex];
|
---|
| 67 | CURLcode code;
|
---|
| 68 | ssize_t actualread;
|
---|
| 69 | ssize_t written;
|
---|
| 70 | int result;
|
---|
| 71 | /* Needs GSS-API authentication */
|
---|
| 72 | SECURITY_STATUS status;
|
---|
| 73 | unsigned long sspi_ret_flags = 0;
|
---|
| 74 | unsigned char gss_enc;
|
---|
| 75 | SecBuffer sspi_send_token, sspi_recv_token, sspi_w_token[3];
|
---|
| 76 | SecBufferDesc input_desc, output_desc, wrap_desc;
|
---|
| 77 | SecPkgContext_Sizes sspi_sizes;
|
---|
| 78 | CredHandle cred_handle;
|
---|
| 79 | CtxtHandle sspi_context;
|
---|
| 80 | PCtxtHandle context_handle = NULL;
|
---|
| 81 | SecPkgCredentials_Names names;
|
---|
| 82 | TimeStamp expiry;
|
---|
| 83 | char *service_name = NULL;
|
---|
| 84 | unsigned short us_length;
|
---|
| 85 | unsigned long qop;
|
---|
| 86 | unsigned char socksreq[4]; /* room for GSS-API exchange header only */
|
---|
| 87 | const char *service = data->set.str[STRING_PROXY_SERVICE_NAME] ?
|
---|
| 88 | data->set.str[STRING_PROXY_SERVICE_NAME] : "rcmd";
|
---|
| 89 | const size_t service_length = strlen(service);
|
---|
| 90 |
|
---|
| 91 | /* GSS-API request looks like
|
---|
| 92 | * +----+------+-----+----------------+
|
---|
| 93 | * |VER | MTYP | LEN | TOKEN |
|
---|
| 94 | * +----+------+----------------------+
|
---|
| 95 | * | 1 | 1 | 2 | up to 2^16 - 1 |
|
---|
| 96 | * +----+------+-----+----------------+
|
---|
| 97 | */
|
---|
| 98 |
|
---|
| 99 | /* prepare service name */
|
---|
| 100 | if(strchr(service, '/')) {
|
---|
| 101 | service_name = strdup(service);
|
---|
| 102 | if(!service_name)
|
---|
| 103 | return CURLE_OUT_OF_MEMORY;
|
---|
| 104 | }
|
---|
| 105 | else {
|
---|
| 106 | service_name = malloc(service_length +
|
---|
| 107 | strlen(conn->socks_proxy.host.name) + 2);
|
---|
| 108 | if(!service_name)
|
---|
| 109 | return CURLE_OUT_OF_MEMORY;
|
---|
| 110 | snprintf(service_name, service_length +
|
---|
| 111 | strlen(conn->socks_proxy.host.name) + 2, "%s/%s",
|
---|
| 112 | service, conn->socks_proxy.host.name);
|
---|
| 113 | }
|
---|
| 114 |
|
---|
| 115 | input_desc.cBuffers = 1;
|
---|
| 116 | input_desc.pBuffers = &sspi_recv_token;
|
---|
| 117 | input_desc.ulVersion = SECBUFFER_VERSION;
|
---|
| 118 |
|
---|
| 119 | sspi_recv_token.BufferType = SECBUFFER_TOKEN;
|
---|
| 120 | sspi_recv_token.cbBuffer = 0;
|
---|
| 121 | sspi_recv_token.pvBuffer = NULL;
|
---|
| 122 |
|
---|
| 123 | output_desc.cBuffers = 1;
|
---|
| 124 | output_desc.pBuffers = &sspi_send_token;
|
---|
| 125 | output_desc.ulVersion = SECBUFFER_VERSION;
|
---|
| 126 |
|
---|
| 127 | sspi_send_token.BufferType = SECBUFFER_TOKEN;
|
---|
| 128 | sspi_send_token.cbBuffer = 0;
|
---|
| 129 | sspi_send_token.pvBuffer = NULL;
|
---|
| 130 |
|
---|
| 131 | wrap_desc.cBuffers = 3;
|
---|
| 132 | wrap_desc.pBuffers = sspi_w_token;
|
---|
| 133 | wrap_desc.ulVersion = SECBUFFER_VERSION;
|
---|
| 134 |
|
---|
| 135 | cred_handle.dwLower = 0;
|
---|
| 136 | cred_handle.dwUpper = 0;
|
---|
| 137 |
|
---|
| 138 | status = s_pSecFn->AcquireCredentialsHandle(NULL,
|
---|
| 139 | (TCHAR *) TEXT("Kerberos"),
|
---|
| 140 | SECPKG_CRED_OUTBOUND,
|
---|
| 141 | NULL,
|
---|
| 142 | NULL,
|
---|
| 143 | NULL,
|
---|
| 144 | NULL,
|
---|
| 145 | &cred_handle,
|
---|
| 146 | &expiry);
|
---|
| 147 |
|
---|
| 148 | if(check_sspi_err(conn, status, "AcquireCredentialsHandle")) {
|
---|
| 149 | failf(data, "Failed to acquire credentials.");
|
---|
| 150 | free(service_name);
|
---|
| 151 | s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
---|
| 152 | return CURLE_COULDNT_CONNECT;
|
---|
| 153 | }
|
---|
| 154 |
|
---|
| 155 | /* As long as we need to keep sending some context info, and there's no */
|
---|
| 156 | /* errors, keep sending it... */
|
---|
| 157 | for(;;) {
|
---|
| 158 | TCHAR *sname;
|
---|
| 159 |
|
---|
| 160 | sname = Curl_convert_UTF8_to_tchar(service_name);
|
---|
| 161 | if(!sname)
|
---|
| 162 | return CURLE_OUT_OF_MEMORY;
|
---|
| 163 |
|
---|
| 164 | status = s_pSecFn->InitializeSecurityContext(&cred_handle,
|
---|
| 165 | context_handle,
|
---|
| 166 | sname,
|
---|
| 167 | ISC_REQ_MUTUAL_AUTH |
|
---|
| 168 | ISC_REQ_ALLOCATE_MEMORY |
|
---|
| 169 | ISC_REQ_CONFIDENTIALITY |
|
---|
| 170 | ISC_REQ_REPLAY_DETECT,
|
---|
| 171 | 0,
|
---|
| 172 | SECURITY_NATIVE_DREP,
|
---|
| 173 | &input_desc,
|
---|
| 174 | 0,
|
---|
| 175 | &sspi_context,
|
---|
| 176 | &output_desc,
|
---|
| 177 | &sspi_ret_flags,
|
---|
| 178 | &expiry);
|
---|
| 179 |
|
---|
| 180 | Curl_unicodefree(sname);
|
---|
| 181 |
|
---|
| 182 | if(sspi_recv_token.pvBuffer) {
|
---|
| 183 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
|
---|
| 184 | sspi_recv_token.pvBuffer = NULL;
|
---|
| 185 | sspi_recv_token.cbBuffer = 0;
|
---|
| 186 | }
|
---|
| 187 |
|
---|
| 188 | if(check_sspi_err(conn, status, "InitializeSecurityContext")) {
|
---|
| 189 | free(service_name);
|
---|
| 190 | s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
---|
| 191 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 192 | if(sspi_recv_token.pvBuffer)
|
---|
| 193 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
|
---|
| 194 | failf(data, "Failed to initialise security context.");
|
---|
| 195 | return CURLE_COULDNT_CONNECT;
|
---|
| 196 | }
|
---|
| 197 |
|
---|
| 198 | if(sspi_send_token.cbBuffer != 0) {
|
---|
| 199 | socksreq[0] = 1; /* GSS-API subnegotiation version */
|
---|
| 200 | socksreq[1] = 1; /* authentication message type */
|
---|
| 201 | us_length = htons((short)sspi_send_token.cbBuffer);
|
---|
| 202 | memcpy(socksreq + 2, &us_length, sizeof(short));
|
---|
| 203 |
|
---|
| 204 | code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written);
|
---|
| 205 | if(code || (4 != written)) {
|
---|
| 206 | failf(data, "Failed to send SSPI authentication request.");
|
---|
| 207 | free(service_name);
|
---|
| 208 | if(sspi_send_token.pvBuffer)
|
---|
| 209 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
---|
| 210 | if(sspi_recv_token.pvBuffer)
|
---|
| 211 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
|
---|
| 212 | s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
---|
| 213 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 214 | return CURLE_COULDNT_CONNECT;
|
---|
| 215 | }
|
---|
| 216 |
|
---|
| 217 | code = Curl_write_plain(conn, sock, (char *)sspi_send_token.pvBuffer,
|
---|
| 218 | sspi_send_token.cbBuffer, &written);
|
---|
| 219 | if(code || (sspi_send_token.cbBuffer != (size_t)written)) {
|
---|
| 220 | failf(data, "Failed to send SSPI authentication token.");
|
---|
| 221 | free(service_name);
|
---|
| 222 | if(sspi_send_token.pvBuffer)
|
---|
| 223 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
---|
| 224 | if(sspi_recv_token.pvBuffer)
|
---|
| 225 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
|
---|
| 226 | s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
---|
| 227 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 228 | return CURLE_COULDNT_CONNECT;
|
---|
| 229 | }
|
---|
| 230 |
|
---|
| 231 | }
|
---|
| 232 |
|
---|
| 233 | if(sspi_send_token.pvBuffer) {
|
---|
| 234 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
---|
| 235 | sspi_send_token.pvBuffer = NULL;
|
---|
| 236 | }
|
---|
| 237 | sspi_send_token.cbBuffer = 0;
|
---|
| 238 |
|
---|
| 239 | if(sspi_recv_token.pvBuffer) {
|
---|
| 240 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
|
---|
| 241 | sspi_recv_token.pvBuffer = NULL;
|
---|
| 242 | }
|
---|
| 243 | sspi_recv_token.cbBuffer = 0;
|
---|
| 244 |
|
---|
| 245 | if(status != SEC_I_CONTINUE_NEEDED)
|
---|
| 246 | break;
|
---|
| 247 |
|
---|
| 248 | /* analyse response */
|
---|
| 249 |
|
---|
| 250 | /* GSS-API response looks like
|
---|
| 251 | * +----+------+-----+----------------+
|
---|
| 252 | * |VER | MTYP | LEN | TOKEN |
|
---|
| 253 | * +----+------+----------------------+
|
---|
| 254 | * | 1 | 1 | 2 | up to 2^16 - 1 |
|
---|
| 255 | * +----+------+-----+----------------+
|
---|
| 256 | */
|
---|
| 257 |
|
---|
| 258 | result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread);
|
---|
| 259 | if(result || (actualread != 4)) {
|
---|
| 260 | failf(data, "Failed to receive SSPI authentication response.");
|
---|
| 261 | free(service_name);
|
---|
| 262 | s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
---|
| 263 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 264 | return CURLE_COULDNT_CONNECT;
|
---|
| 265 | }
|
---|
| 266 |
|
---|
| 267 | /* ignore the first (VER) byte */
|
---|
| 268 | if(socksreq[1] == 255) { /* status / message type */
|
---|
| 269 | failf(data, "User was rejected by the SOCKS5 server (%u %u).",
|
---|
| 270 | (unsigned int)socksreq[0], (unsigned int)socksreq[1]);
|
---|
| 271 | free(service_name);
|
---|
| 272 | s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
---|
| 273 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 274 | return CURLE_COULDNT_CONNECT;
|
---|
| 275 | }
|
---|
| 276 |
|
---|
| 277 | if(socksreq[1] != 1) { /* status / messgae type */
|
---|
| 278 | failf(data, "Invalid SSPI authentication response type (%u %u).",
|
---|
| 279 | (unsigned int)socksreq[0], (unsigned int)socksreq[1]);
|
---|
| 280 | free(service_name);
|
---|
| 281 | s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
---|
| 282 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 283 | return CURLE_COULDNT_CONNECT;
|
---|
| 284 | }
|
---|
| 285 |
|
---|
| 286 | memcpy(&us_length, socksreq + 2, sizeof(short));
|
---|
| 287 | us_length = ntohs(us_length);
|
---|
| 288 |
|
---|
| 289 | sspi_recv_token.cbBuffer = us_length;
|
---|
| 290 | sspi_recv_token.pvBuffer = malloc(us_length);
|
---|
| 291 |
|
---|
| 292 | if(!sspi_recv_token.pvBuffer) {
|
---|
| 293 | free(service_name);
|
---|
| 294 | s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
---|
| 295 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 296 | return CURLE_OUT_OF_MEMORY;
|
---|
| 297 | }
|
---|
| 298 | result = Curl_blockread_all(conn, sock, (char *)sspi_recv_token.pvBuffer,
|
---|
| 299 | sspi_recv_token.cbBuffer, &actualread);
|
---|
| 300 |
|
---|
| 301 | if(result || (actualread != us_length)) {
|
---|
| 302 | failf(data, "Failed to receive SSPI authentication token.");
|
---|
| 303 | free(service_name);
|
---|
| 304 | if(sspi_recv_token.pvBuffer)
|
---|
| 305 | s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
|
---|
| 306 | s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
---|
| 307 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 308 | return CURLE_COULDNT_CONNECT;
|
---|
| 309 | }
|
---|
| 310 |
|
---|
| 311 | context_handle = &sspi_context;
|
---|
| 312 | }
|
---|
| 313 |
|
---|
| 314 | free(service_name);
|
---|
| 315 |
|
---|
| 316 | /* Everything is good so far, user was authenticated! */
|
---|
| 317 | status = s_pSecFn->QueryCredentialsAttributes(&cred_handle,
|
---|
| 318 | SECPKG_CRED_ATTR_NAMES,
|
---|
| 319 | &names);
|
---|
| 320 | s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
---|
| 321 | if(check_sspi_err(conn, status, "QueryCredentialAttributes")) {
|
---|
| 322 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 323 | s_pSecFn->FreeContextBuffer(names.sUserName);
|
---|
| 324 | failf(data, "Failed to determine user name.");
|
---|
| 325 | return CURLE_COULDNT_CONNECT;
|
---|
| 326 | }
|
---|
| 327 | infof(data, "SOCKS5 server authencticated user %s with GSS-API.\n",
|
---|
| 328 | names.sUserName);
|
---|
| 329 | s_pSecFn->FreeContextBuffer(names.sUserName);
|
---|
| 330 |
|
---|
| 331 | /* Do encryption */
|
---|
| 332 | socksreq[0] = 1; /* GSS-API subnegotiation version */
|
---|
| 333 | socksreq[1] = 2; /* encryption message type */
|
---|
| 334 |
|
---|
| 335 | gss_enc = 0; /* no data protection */
|
---|
| 336 | /* do confidentiality protection if supported */
|
---|
| 337 | if(sspi_ret_flags & ISC_REQ_CONFIDENTIALITY)
|
---|
| 338 | gss_enc = 2;
|
---|
| 339 | /* else do integrity protection */
|
---|
| 340 | else if(sspi_ret_flags & ISC_REQ_INTEGRITY)
|
---|
| 341 | gss_enc = 1;
|
---|
| 342 |
|
---|
| 343 | infof(data, "SOCKS5 server supports GSS-API %s data protection.\n",
|
---|
| 344 | (gss_enc == 0)?"no":((gss_enc == 1)?"integrity":"confidentiality") );
|
---|
| 345 | /* force to no data protection, avoid encryption/decryption for now */
|
---|
| 346 | gss_enc = 0;
|
---|
| 347 | /*
|
---|
| 348 | * Sending the encryption type in clear seems wrong. It should be
|
---|
| 349 | * protected with gss_seal()/gss_wrap(). See RFC1961 extract below
|
---|
| 350 | * The NEC reference implementations on which this is based is
|
---|
| 351 | * therefore at fault
|
---|
| 352 | *
|
---|
| 353 | * +------+------+------+.......................+
|
---|
| 354 | * + ver | mtyp | len | token |
|
---|
| 355 | * +------+------+------+.......................+
|
---|
| 356 | * + 0x01 | 0x02 | 0x02 | up to 2^16 - 1 octets |
|
---|
| 357 | * +------+------+------+.......................+
|
---|
| 358 | *
|
---|
| 359 | * Where:
|
---|
| 360 | *
|
---|
| 361 | * - "ver" is the protocol version number, here 1 to represent the
|
---|
| 362 | * first version of the SOCKS/GSS-API protocol
|
---|
| 363 | *
|
---|
| 364 | * - "mtyp" is the message type, here 2 to represent a protection
|
---|
| 365 | * -level negotiation message
|
---|
| 366 | *
|
---|
| 367 | * - "len" is the length of the "token" field in octets
|
---|
| 368 | *
|
---|
| 369 | * - "token" is the GSS-API encapsulated protection level
|
---|
| 370 | *
|
---|
| 371 | * The token is produced by encapsulating an octet containing the
|
---|
| 372 | * required protection level using gss_seal()/gss_wrap() with conf_req
|
---|
| 373 | * set to FALSE. The token is verified using gss_unseal()/
|
---|
| 374 | * gss_unwrap().
|
---|
| 375 | *
|
---|
| 376 | */
|
---|
| 377 |
|
---|
| 378 | if(data->set.socks5_gssapi_nec) {
|
---|
| 379 | us_length = htons((short)1);
|
---|
| 380 | memcpy(socksreq + 2, &us_length, sizeof(short));
|
---|
| 381 | }
|
---|
| 382 | else {
|
---|
| 383 | status = s_pSecFn->QueryContextAttributes(&sspi_context,
|
---|
| 384 | SECPKG_ATTR_SIZES,
|
---|
| 385 | &sspi_sizes);
|
---|
| 386 | if(check_sspi_err(conn, status, "QueryContextAttributes")) {
|
---|
| 387 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 388 | failf(data, "Failed to query security context attributes.");
|
---|
| 389 | return CURLE_COULDNT_CONNECT;
|
---|
| 390 | }
|
---|
| 391 |
|
---|
| 392 | sspi_w_token[0].cbBuffer = sspi_sizes.cbSecurityTrailer;
|
---|
| 393 | sspi_w_token[0].BufferType = SECBUFFER_TOKEN;
|
---|
| 394 | sspi_w_token[0].pvBuffer = malloc(sspi_sizes.cbSecurityTrailer);
|
---|
| 395 |
|
---|
| 396 | if(!sspi_w_token[0].pvBuffer) {
|
---|
| 397 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 398 | return CURLE_OUT_OF_MEMORY;
|
---|
| 399 | }
|
---|
| 400 |
|
---|
| 401 | sspi_w_token[1].cbBuffer = 1;
|
---|
| 402 | sspi_w_token[1].pvBuffer = malloc(1);
|
---|
| 403 | if(!sspi_w_token[1].pvBuffer) {
|
---|
| 404 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 405 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 406 | return CURLE_OUT_OF_MEMORY;
|
---|
| 407 | }
|
---|
| 408 |
|
---|
| 409 | memcpy(sspi_w_token[1].pvBuffer, &gss_enc, 1);
|
---|
| 410 | sspi_w_token[2].BufferType = SECBUFFER_PADDING;
|
---|
| 411 | sspi_w_token[2].cbBuffer = sspi_sizes.cbBlockSize;
|
---|
| 412 | sspi_w_token[2].pvBuffer = malloc(sspi_sizes.cbBlockSize);
|
---|
| 413 | if(!sspi_w_token[2].pvBuffer) {
|
---|
| 414 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 415 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
---|
| 416 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 417 | return CURLE_OUT_OF_MEMORY;
|
---|
| 418 | }
|
---|
| 419 | status = s_pSecFn->EncryptMessage(&sspi_context,
|
---|
| 420 | KERB_WRAP_NO_ENCRYPT,
|
---|
| 421 | &wrap_desc,
|
---|
| 422 | 0);
|
---|
| 423 | if(check_sspi_err(conn, status, "EncryptMessage")) {
|
---|
| 424 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 425 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
---|
| 426 | s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer);
|
---|
| 427 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 428 | failf(data, "Failed to query security context attributes.");
|
---|
| 429 | return CURLE_COULDNT_CONNECT;
|
---|
| 430 | }
|
---|
| 431 | sspi_send_token.cbBuffer = sspi_w_token[0].cbBuffer
|
---|
| 432 | + sspi_w_token[1].cbBuffer
|
---|
| 433 | + sspi_w_token[2].cbBuffer;
|
---|
| 434 | sspi_send_token.pvBuffer = malloc(sspi_send_token.cbBuffer);
|
---|
| 435 | if(!sspi_send_token.pvBuffer) {
|
---|
| 436 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 437 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
---|
| 438 | s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer);
|
---|
| 439 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 440 | return CURLE_OUT_OF_MEMORY;
|
---|
| 441 | }
|
---|
| 442 |
|
---|
| 443 | memcpy(sspi_send_token.pvBuffer, sspi_w_token[0].pvBuffer,
|
---|
| 444 | sspi_w_token[0].cbBuffer);
|
---|
| 445 | memcpy((PUCHAR) sspi_send_token.pvBuffer +(int)sspi_w_token[0].cbBuffer,
|
---|
| 446 | sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer);
|
---|
| 447 | memcpy((PUCHAR) sspi_send_token.pvBuffer
|
---|
| 448 | + sspi_w_token[0].cbBuffer
|
---|
| 449 | + sspi_w_token[1].cbBuffer,
|
---|
| 450 | sspi_w_token[2].pvBuffer, sspi_w_token[2].cbBuffer);
|
---|
| 451 |
|
---|
| 452 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 453 | sspi_w_token[0].pvBuffer = NULL;
|
---|
| 454 | sspi_w_token[0].cbBuffer = 0;
|
---|
| 455 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
---|
| 456 | sspi_w_token[1].pvBuffer = NULL;
|
---|
| 457 | sspi_w_token[1].cbBuffer = 0;
|
---|
| 458 | s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer);
|
---|
| 459 | sspi_w_token[2].pvBuffer = NULL;
|
---|
| 460 | sspi_w_token[2].cbBuffer = 0;
|
---|
| 461 |
|
---|
| 462 | us_length = htons((short)sspi_send_token.cbBuffer);
|
---|
| 463 | memcpy(socksreq + 2, &us_length, sizeof(short));
|
---|
| 464 | }
|
---|
| 465 |
|
---|
| 466 | code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written);
|
---|
| 467 | if(code || (4 != written)) {
|
---|
| 468 | failf(data, "Failed to send SSPI encryption request.");
|
---|
| 469 | if(sspi_send_token.pvBuffer)
|
---|
| 470 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
---|
| 471 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 472 | return CURLE_COULDNT_CONNECT;
|
---|
| 473 | }
|
---|
| 474 |
|
---|
| 475 | if(data->set.socks5_gssapi_nec) {
|
---|
| 476 | memcpy(socksreq, &gss_enc, 1);
|
---|
| 477 | code = Curl_write_plain(conn, sock, (char *)socksreq, 1, &written);
|
---|
| 478 | if(code || (1 != written)) {
|
---|
| 479 | failf(data, "Failed to send SSPI encryption type.");
|
---|
| 480 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 481 | return CURLE_COULDNT_CONNECT;
|
---|
| 482 | }
|
---|
| 483 | }
|
---|
| 484 | else {
|
---|
| 485 | code = Curl_write_plain(conn, sock, (char *)sspi_send_token.pvBuffer,
|
---|
| 486 | sspi_send_token.cbBuffer, &written);
|
---|
| 487 | if(code || (sspi_send_token.cbBuffer != (size_t)written)) {
|
---|
| 488 | failf(data, "Failed to send SSPI encryption type.");
|
---|
| 489 | if(sspi_send_token.pvBuffer)
|
---|
| 490 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
---|
| 491 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 492 | return CURLE_COULDNT_CONNECT;
|
---|
| 493 | }
|
---|
| 494 | if(sspi_send_token.pvBuffer)
|
---|
| 495 | s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
---|
| 496 | }
|
---|
| 497 |
|
---|
| 498 | result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread);
|
---|
| 499 | if(result || (actualread != 4)) {
|
---|
| 500 | failf(data, "Failed to receive SSPI encryption response.");
|
---|
| 501 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 502 | return CURLE_COULDNT_CONNECT;
|
---|
| 503 | }
|
---|
| 504 |
|
---|
| 505 | /* ignore the first (VER) byte */
|
---|
| 506 | if(socksreq[1] == 255) { /* status / message type */
|
---|
| 507 | failf(data, "User was rejected by the SOCKS5 server (%u %u).",
|
---|
| 508 | (unsigned int)socksreq[0], (unsigned int)socksreq[1]);
|
---|
| 509 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 510 | return CURLE_COULDNT_CONNECT;
|
---|
| 511 | }
|
---|
| 512 |
|
---|
| 513 | if(socksreq[1] != 2) { /* status / message type */
|
---|
| 514 | failf(data, "Invalid SSPI encryption response type (%u %u).",
|
---|
| 515 | (unsigned int)socksreq[0], (unsigned int)socksreq[1]);
|
---|
| 516 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 517 | return CURLE_COULDNT_CONNECT;
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | memcpy(&us_length, socksreq + 2, sizeof(short));
|
---|
| 521 | us_length = ntohs(us_length);
|
---|
| 522 |
|
---|
| 523 | sspi_w_token[0].cbBuffer = us_length;
|
---|
| 524 | sspi_w_token[0].pvBuffer = malloc(us_length);
|
---|
| 525 | if(!sspi_w_token[0].pvBuffer) {
|
---|
| 526 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 527 | return CURLE_OUT_OF_MEMORY;
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 | result = Curl_blockread_all(conn, sock, (char *)sspi_w_token[0].pvBuffer,
|
---|
| 531 | sspi_w_token[0].cbBuffer, &actualread);
|
---|
| 532 |
|
---|
| 533 | if(result || (actualread != us_length)) {
|
---|
| 534 | failf(data, "Failed to receive SSPI encryption type.");
|
---|
| 535 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 536 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 537 | return CURLE_COULDNT_CONNECT;
|
---|
| 538 | }
|
---|
| 539 |
|
---|
| 540 |
|
---|
| 541 | if(!data->set.socks5_gssapi_nec) {
|
---|
| 542 | wrap_desc.cBuffers = 2;
|
---|
| 543 | sspi_w_token[0].BufferType = SECBUFFER_STREAM;
|
---|
| 544 | sspi_w_token[1].BufferType = SECBUFFER_DATA;
|
---|
| 545 | sspi_w_token[1].cbBuffer = 0;
|
---|
| 546 | sspi_w_token[1].pvBuffer = NULL;
|
---|
| 547 |
|
---|
| 548 | status = s_pSecFn->DecryptMessage(&sspi_context,
|
---|
| 549 | &wrap_desc,
|
---|
| 550 | 0,
|
---|
| 551 | &qop);
|
---|
| 552 |
|
---|
| 553 | if(check_sspi_err(conn, status, "DecryptMessage")) {
|
---|
| 554 | if(sspi_w_token[0].pvBuffer)
|
---|
| 555 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 556 | if(sspi_w_token[1].pvBuffer)
|
---|
| 557 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
---|
| 558 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 559 | failf(data, "Failed to query security context attributes.");
|
---|
| 560 | return CURLE_COULDNT_CONNECT;
|
---|
| 561 | }
|
---|
| 562 |
|
---|
| 563 | if(sspi_w_token[1].cbBuffer != 1) {
|
---|
| 564 | failf(data, "Invalid SSPI encryption response length (%lu).",
|
---|
| 565 | (unsigned long)sspi_w_token[1].cbBuffer);
|
---|
| 566 | if(sspi_w_token[0].pvBuffer)
|
---|
| 567 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 568 | if(sspi_w_token[1].pvBuffer)
|
---|
| 569 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
---|
| 570 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 571 | return CURLE_COULDNT_CONNECT;
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 | memcpy(socksreq, sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer);
|
---|
| 575 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 576 | s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
---|
| 577 | }
|
---|
| 578 | else {
|
---|
| 579 | if(sspi_w_token[0].cbBuffer != 1) {
|
---|
| 580 | failf(data, "Invalid SSPI encryption response length (%lu).",
|
---|
| 581 | (unsigned long)sspi_w_token[0].cbBuffer);
|
---|
| 582 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 583 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 584 | return CURLE_COULDNT_CONNECT;
|
---|
| 585 | }
|
---|
| 586 | memcpy(socksreq, sspi_w_token[0].pvBuffer, sspi_w_token[0].cbBuffer);
|
---|
| 587 | s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
---|
| 588 | }
|
---|
| 589 |
|
---|
| 590 | infof(data, "SOCKS5 access with%s protection granted.\n",
|
---|
| 591 | (socksreq[0] == 0)?"out GSS-API data":
|
---|
| 592 | ((socksreq[0] == 1)?" GSS-API integrity":" GSS-API confidentiality"));
|
---|
| 593 |
|
---|
| 594 | /* For later use if encryption is required
|
---|
| 595 | conn->socks5_gssapi_enctype = socksreq[0];
|
---|
| 596 | if(socksreq[0] != 0)
|
---|
| 597 | conn->socks5_sspi_context = sspi_context;
|
---|
| 598 | else {
|
---|
| 599 | s_pSecFn->DeleteSecurityContext(&sspi_context);
|
---|
| 600 | conn->socks5_sspi_context = sspi_context;
|
---|
| 601 | }
|
---|
| 602 | */
|
---|
| 603 | return CURLE_OK;
|
---|
| 604 | }
|
---|
| 605 | #endif
|
---|