607 lines
22 KiB
C
607 lines
22 KiB
C
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 2012 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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* Copyright (C) 2009, 2011, Markus Moeller, <markus_moeller@compuserve.com>
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#if defined(USE_WINDOWS_SSPI) && !defined(CURL_DISABLE_PROXY)
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#include "urldata.h"
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#include "sendf.h"
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#include "connect.h"
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#include "strerror.h"
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#include "timeval.h"
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#include "socks.h"
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#include "curl_sspi.h"
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#include "curl_multibyte.h"
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#include "warnless.h"
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#include "strdup.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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/*
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* Helper sspi error functions.
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*/
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static int check_sspi_err(struct connectdata *conn,
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SECURITY_STATUS status,
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const char *function)
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{
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if(status != SEC_E_OK &&
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status != SEC_I_COMPLETE_AND_CONTINUE &&
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status != SEC_I_COMPLETE_NEEDED &&
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status != SEC_I_CONTINUE_NEEDED) {
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char buffer[STRERROR_LEN];
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failf(conn->data, "SSPI error: %s failed: %s", function,
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Curl_sspi_strerror(status, buffer, sizeof(buffer)));
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return 1;
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}
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return 0;
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}
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/* This is the SSPI-using version of this function */
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CURLcode Curl_SOCKS5_gssapi_negotiate(int sockindex,
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struct connectdata *conn)
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{
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struct Curl_easy *data = conn->data;
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curl_socket_t sock = conn->sock[sockindex];
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CURLcode code;
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ssize_t actualread;
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ssize_t written;
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int result;
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/* Needs GSS-API authentication */
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SECURITY_STATUS status;
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unsigned long sspi_ret_flags = 0;
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unsigned char gss_enc;
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SecBuffer sspi_send_token, sspi_recv_token, sspi_w_token[3];
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SecBufferDesc input_desc, output_desc, wrap_desc;
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SecPkgContext_Sizes sspi_sizes;
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CredHandle cred_handle;
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CtxtHandle sspi_context;
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PCtxtHandle context_handle = NULL;
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SecPkgCredentials_Names names;
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TimeStamp expiry;
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char *service_name = NULL;
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unsigned short us_length;
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unsigned long qop;
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unsigned char socksreq[4]; /* room for GSS-API exchange header only */
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const char *service = data->set.str[STRING_PROXY_SERVICE_NAME] ?
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data->set.str[STRING_PROXY_SERVICE_NAME] : "rcmd";
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const size_t service_length = strlen(service);
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/* GSS-API request looks like
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* +----+------+-----+----------------+
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* |VER | MTYP | LEN | TOKEN |
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* +----+------+----------------------+
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* | 1 | 1 | 2 | up to 2^16 - 1 |
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* +----+------+-----+----------------+
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*/
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/* prepare service name */
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if(strchr(service, '/')) {
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service_name = strdup(service);
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if(!service_name)
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return CURLE_OUT_OF_MEMORY;
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}
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else {
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service_name = malloc(service_length +
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strlen(conn->socks_proxy.host.name) + 2);
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if(!service_name)
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return CURLE_OUT_OF_MEMORY;
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msnprintf(service_name, service_length +
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strlen(conn->socks_proxy.host.name) + 2, "%s/%s",
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service, conn->socks_proxy.host.name);
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}
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input_desc.cBuffers = 1;
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input_desc.pBuffers = &sspi_recv_token;
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input_desc.ulVersion = SECBUFFER_VERSION;
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sspi_recv_token.BufferType = SECBUFFER_TOKEN;
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sspi_recv_token.cbBuffer = 0;
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sspi_recv_token.pvBuffer = NULL;
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output_desc.cBuffers = 1;
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output_desc.pBuffers = &sspi_send_token;
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output_desc.ulVersion = SECBUFFER_VERSION;
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sspi_send_token.BufferType = SECBUFFER_TOKEN;
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sspi_send_token.cbBuffer = 0;
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sspi_send_token.pvBuffer = NULL;
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wrap_desc.cBuffers = 3;
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wrap_desc.pBuffers = sspi_w_token;
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wrap_desc.ulVersion = SECBUFFER_VERSION;
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cred_handle.dwLower = 0;
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cred_handle.dwUpper = 0;
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status = s_pSecFn->AcquireCredentialsHandle(NULL,
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(TCHAR *) TEXT("Kerberos"),
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SECPKG_CRED_OUTBOUND,
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NULL,
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NULL,
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NULL,
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NULL,
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&cred_handle,
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&expiry);
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if(check_sspi_err(conn, status, "AcquireCredentialsHandle")) {
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failf(data, "Failed to acquire credentials.");
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free(service_name);
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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return CURLE_COULDNT_CONNECT;
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}
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/* As long as we need to keep sending some context info, and there's no */
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/* errors, keep sending it... */
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for(;;) {
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TCHAR *sname;
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sname = Curl_convert_UTF8_to_tchar(service_name);
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if(!sname)
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return CURLE_OUT_OF_MEMORY;
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status = s_pSecFn->InitializeSecurityContext(&cred_handle,
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context_handle,
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sname,
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ISC_REQ_MUTUAL_AUTH |
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ISC_REQ_ALLOCATE_MEMORY |
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ISC_REQ_CONFIDENTIALITY |
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ISC_REQ_REPLAY_DETECT,
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0,
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SECURITY_NATIVE_DREP,
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&input_desc,
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0,
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&sspi_context,
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&output_desc,
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&sspi_ret_flags,
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&expiry);
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Curl_unicodefree(sname);
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if(sspi_recv_token.pvBuffer) {
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s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
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sspi_recv_token.pvBuffer = NULL;
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sspi_recv_token.cbBuffer = 0;
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}
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if(check_sspi_err(conn, status, "InitializeSecurityContext")) {
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free(service_name);
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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s_pSecFn->DeleteSecurityContext(&sspi_context);
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if(sspi_recv_token.pvBuffer)
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s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
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failf(data, "Failed to initialise security context.");
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return CURLE_COULDNT_CONNECT;
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}
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if(sspi_send_token.cbBuffer != 0) {
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socksreq[0] = 1; /* GSS-API subnegotiation version */
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socksreq[1] = 1; /* authentication message type */
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us_length = htons((short)sspi_send_token.cbBuffer);
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memcpy(socksreq + 2, &us_length, sizeof(short));
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code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written);
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if(code || (4 != written)) {
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failf(data, "Failed to send SSPI authentication request.");
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free(service_name);
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if(sspi_send_token.pvBuffer)
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s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
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if(sspi_recv_token.pvBuffer)
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s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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s_pSecFn->DeleteSecurityContext(&sspi_context);
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return CURLE_COULDNT_CONNECT;
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}
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code = Curl_write_plain(conn, sock, (char *)sspi_send_token.pvBuffer,
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sspi_send_token.cbBuffer, &written);
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if(code || (sspi_send_token.cbBuffer != (size_t)written)) {
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failf(data, "Failed to send SSPI authentication token.");
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free(service_name);
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if(sspi_send_token.pvBuffer)
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s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
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if(sspi_recv_token.pvBuffer)
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s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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s_pSecFn->DeleteSecurityContext(&sspi_context);
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return CURLE_COULDNT_CONNECT;
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}
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}
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if(sspi_send_token.pvBuffer) {
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s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
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sspi_send_token.pvBuffer = NULL;
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}
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sspi_send_token.cbBuffer = 0;
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if(sspi_recv_token.pvBuffer) {
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s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
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sspi_recv_token.pvBuffer = NULL;
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}
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sspi_recv_token.cbBuffer = 0;
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if(status != SEC_I_CONTINUE_NEEDED)
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break;
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/* analyse response */
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/* GSS-API response looks like
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* +----+------+-----+----------------+
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* |VER | MTYP | LEN | TOKEN |
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* +----+------+----------------------+
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* | 1 | 1 | 2 | up to 2^16 - 1 |
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* +----+------+-----+----------------+
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*/
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result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread);
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if(result || (actualread != 4)) {
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failf(data, "Failed to receive SSPI authentication response.");
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free(service_name);
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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s_pSecFn->DeleteSecurityContext(&sspi_context);
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return CURLE_COULDNT_CONNECT;
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}
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/* ignore the first (VER) byte */
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if(socksreq[1] == 255) { /* status / message type */
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failf(data, "User was rejected by the SOCKS5 server (%u %u).",
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(unsigned int)socksreq[0], (unsigned int)socksreq[1]);
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free(service_name);
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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s_pSecFn->DeleteSecurityContext(&sspi_context);
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return CURLE_COULDNT_CONNECT;
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}
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if(socksreq[1] != 1) { /* status / messgae type */
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failf(data, "Invalid SSPI authentication response type (%u %u).",
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(unsigned int)socksreq[0], (unsigned int)socksreq[1]);
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free(service_name);
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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s_pSecFn->DeleteSecurityContext(&sspi_context);
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return CURLE_COULDNT_CONNECT;
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}
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memcpy(&us_length, socksreq + 2, sizeof(short));
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us_length = ntohs(us_length);
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sspi_recv_token.cbBuffer = us_length;
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sspi_recv_token.pvBuffer = malloc(us_length);
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if(!sspi_recv_token.pvBuffer) {
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free(service_name);
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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s_pSecFn->DeleteSecurityContext(&sspi_context);
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return CURLE_OUT_OF_MEMORY;
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}
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result = Curl_blockread_all(conn, sock, (char *)sspi_recv_token.pvBuffer,
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sspi_recv_token.cbBuffer, &actualread);
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if(result || (actualread != us_length)) {
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failf(data, "Failed to receive SSPI authentication token.");
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free(service_name);
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if(sspi_recv_token.pvBuffer)
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s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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s_pSecFn->DeleteSecurityContext(&sspi_context);
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return CURLE_COULDNT_CONNECT;
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}
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context_handle = &sspi_context;
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}
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free(service_name);
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/* Everything is good so far, user was authenticated! */
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status = s_pSecFn->QueryCredentialsAttributes(&cred_handle,
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SECPKG_CRED_ATTR_NAMES,
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&names);
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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if(check_sspi_err(conn, status, "QueryCredentialAttributes")) {
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s_pSecFn->DeleteSecurityContext(&sspi_context);
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s_pSecFn->FreeContextBuffer(names.sUserName);
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failf(data, "Failed to determine user name.");
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return CURLE_COULDNT_CONNECT;
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}
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infof(data, "SOCKS5 server authencticated user %s with GSS-API.\n",
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names.sUserName);
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s_pSecFn->FreeContextBuffer(names.sUserName);
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/* Do encryption */
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socksreq[0] = 1; /* GSS-API subnegotiation version */
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socksreq[1] = 2; /* encryption message type */
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gss_enc = 0; /* no data protection */
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/* do confidentiality protection if supported */
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if(sspi_ret_flags & ISC_REQ_CONFIDENTIALITY)
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gss_enc = 2;
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/* else do integrity protection */
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else if(sspi_ret_flags & ISC_REQ_INTEGRITY)
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gss_enc = 1;
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infof(data, "SOCKS5 server supports GSS-API %s data protection.\n",
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(gss_enc == 0)?"no":((gss_enc == 1)?"integrity":"confidentiality") );
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/* force to no data protection, avoid encryption/decryption for now */
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gss_enc = 0;
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/*
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|
* Sending the encryption type in clear seems wrong. It should be
|
||
|
|
* protected with gss_seal()/gss_wrap(). See RFC1961 extract below
|
||
|
|
* The NEC reference implementations on which this is based is
|
||
|
|
* therefore at fault
|
||
|
|
*
|
||
|
|
* +------+------+------+.......................+
|
||
|
|
* + ver | mtyp | len | token |
|
||
|
|
* +------+------+------+.......................+
|
||
|
|
* + 0x01 | 0x02 | 0x02 | up to 2^16 - 1 octets |
|
||
|
|
* +------+------+------+.......................+
|
||
|
|
*
|
||
|
|
* Where:
|
||
|
|
*
|
||
|
|
* - "ver" is the protocol version number, here 1 to represent the
|
||
|
|
* first version of the SOCKS/GSS-API protocol
|
||
|
|
*
|
||
|
|
* - "mtyp" is the message type, here 2 to represent a protection
|
||
|
|
* -level negotiation message
|
||
|
|
*
|
||
|
|
* - "len" is the length of the "token" field in octets
|
||
|
|
*
|
||
|
|
* - "token" is the GSS-API encapsulated protection level
|
||
|
|
*
|
||
|
|
* The token is produced by encapsulating an octet containing the
|
||
|
|
* required protection level using gss_seal()/gss_wrap() with conf_req
|
||
|
|
* set to FALSE. The token is verified using gss_unseal()/
|
||
|
|
* gss_unwrap().
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
if(data->set.socks5_gssapi_nec) {
|
||
|
|
us_length = htons((short)1);
|
||
|
|
memcpy(socksreq + 2, &us_length, sizeof(short));
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
status = s_pSecFn->QueryContextAttributes(&sspi_context,
|
||
|
|
SECPKG_ATTR_SIZES,
|
||
|
|
&sspi_sizes);
|
||
|
|
if(check_sspi_err(conn, status, "QueryContextAttributes")) {
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
failf(data, "Failed to query security context attributes.");
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
|
||
|
|
sspi_w_token[0].cbBuffer = sspi_sizes.cbSecurityTrailer;
|
||
|
|
sspi_w_token[0].BufferType = SECBUFFER_TOKEN;
|
||
|
|
sspi_w_token[0].pvBuffer = malloc(sspi_sizes.cbSecurityTrailer);
|
||
|
|
|
||
|
|
if(!sspi_w_token[0].pvBuffer) {
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
sspi_w_token[1].cbBuffer = 1;
|
||
|
|
sspi_w_token[1].pvBuffer = malloc(1);
|
||
|
|
if(!sspi_w_token[1].pvBuffer) {
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
memcpy(sspi_w_token[1].pvBuffer, &gss_enc, 1);
|
||
|
|
sspi_w_token[2].BufferType = SECBUFFER_PADDING;
|
||
|
|
sspi_w_token[2].cbBuffer = sspi_sizes.cbBlockSize;
|
||
|
|
sspi_w_token[2].pvBuffer = malloc(sspi_sizes.cbBlockSize);
|
||
|
|
if(!sspi_w_token[2].pvBuffer) {
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
status = s_pSecFn->EncryptMessage(&sspi_context,
|
||
|
|
KERB_WRAP_NO_ENCRYPT,
|
||
|
|
&wrap_desc,
|
||
|
|
0);
|
||
|
|
if(check_sspi_err(conn, status, "EncryptMessage")) {
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
failf(data, "Failed to query security context attributes.");
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
sspi_send_token.cbBuffer = sspi_w_token[0].cbBuffer
|
||
|
|
+ sspi_w_token[1].cbBuffer
|
||
|
|
+ sspi_w_token[2].cbBuffer;
|
||
|
|
sspi_send_token.pvBuffer = malloc(sspi_send_token.cbBuffer);
|
||
|
|
if(!sspi_send_token.pvBuffer) {
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
memcpy(sspi_send_token.pvBuffer, sspi_w_token[0].pvBuffer,
|
||
|
|
sspi_w_token[0].cbBuffer);
|
||
|
|
memcpy((PUCHAR) sspi_send_token.pvBuffer +(int)sspi_w_token[0].cbBuffer,
|
||
|
|
sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer);
|
||
|
|
memcpy((PUCHAR) sspi_send_token.pvBuffer
|
||
|
|
+ sspi_w_token[0].cbBuffer
|
||
|
|
+ sspi_w_token[1].cbBuffer,
|
||
|
|
sspi_w_token[2].pvBuffer, sspi_w_token[2].cbBuffer);
|
||
|
|
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
sspi_w_token[0].pvBuffer = NULL;
|
||
|
|
sspi_w_token[0].cbBuffer = 0;
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
||
|
|
sspi_w_token[1].pvBuffer = NULL;
|
||
|
|
sspi_w_token[1].cbBuffer = 0;
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[2].pvBuffer);
|
||
|
|
sspi_w_token[2].pvBuffer = NULL;
|
||
|
|
sspi_w_token[2].cbBuffer = 0;
|
||
|
|
|
||
|
|
us_length = htons((short)sspi_send_token.cbBuffer);
|
||
|
|
memcpy(socksreq + 2, &us_length, sizeof(short));
|
||
|
|
}
|
||
|
|
|
||
|
|
code = Curl_write_plain(conn, sock, (char *)socksreq, 4, &written);
|
||
|
|
if(code || (4 != written)) {
|
||
|
|
failf(data, "Failed to send SSPI encryption request.");
|
||
|
|
if(sspi_send_token.pvBuffer)
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(data->set.socks5_gssapi_nec) {
|
||
|
|
memcpy(socksreq, &gss_enc, 1);
|
||
|
|
code = Curl_write_plain(conn, sock, (char *)socksreq, 1, &written);
|
||
|
|
if(code || (1 != written)) {
|
||
|
|
failf(data, "Failed to send SSPI encryption type.");
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
code = Curl_write_plain(conn, sock, (char *)sspi_send_token.pvBuffer,
|
||
|
|
sspi_send_token.cbBuffer, &written);
|
||
|
|
if(code || (sspi_send_token.cbBuffer != (size_t)written)) {
|
||
|
|
failf(data, "Failed to send SSPI encryption type.");
|
||
|
|
if(sspi_send_token.pvBuffer)
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
if(sspi_send_token.pvBuffer)
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
||
|
|
}
|
||
|
|
|
||
|
|
result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread);
|
||
|
|
if(result || (actualread != 4)) {
|
||
|
|
failf(data, "Failed to receive SSPI encryption response.");
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ignore the first (VER) byte */
|
||
|
|
if(socksreq[1] == 255) { /* status / message type */
|
||
|
|
failf(data, "User was rejected by the SOCKS5 server (%u %u).",
|
||
|
|
(unsigned int)socksreq[0], (unsigned int)socksreq[1]);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(socksreq[1] != 2) { /* status / message type */
|
||
|
|
failf(data, "Invalid SSPI encryption response type (%u %u).",
|
||
|
|
(unsigned int)socksreq[0], (unsigned int)socksreq[1]);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
|
||
|
|
memcpy(&us_length, socksreq + 2, sizeof(short));
|
||
|
|
us_length = ntohs(us_length);
|
||
|
|
|
||
|
|
sspi_w_token[0].cbBuffer = us_length;
|
||
|
|
sspi_w_token[0].pvBuffer = malloc(us_length);
|
||
|
|
if(!sspi_w_token[0].pvBuffer) {
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
result = Curl_blockread_all(conn, sock, (char *)sspi_w_token[0].pvBuffer,
|
||
|
|
sspi_w_token[0].cbBuffer, &actualread);
|
||
|
|
|
||
|
|
if(result || (actualread != us_length)) {
|
||
|
|
failf(data, "Failed to receive SSPI encryption type.");
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
if(!data->set.socks5_gssapi_nec) {
|
||
|
|
wrap_desc.cBuffers = 2;
|
||
|
|
sspi_w_token[0].BufferType = SECBUFFER_STREAM;
|
||
|
|
sspi_w_token[1].BufferType = SECBUFFER_DATA;
|
||
|
|
sspi_w_token[1].cbBuffer = 0;
|
||
|
|
sspi_w_token[1].pvBuffer = NULL;
|
||
|
|
|
||
|
|
status = s_pSecFn->DecryptMessage(&sspi_context,
|
||
|
|
&wrap_desc,
|
||
|
|
0,
|
||
|
|
&qop);
|
||
|
|
|
||
|
|
if(check_sspi_err(conn, status, "DecryptMessage")) {
|
||
|
|
if(sspi_w_token[0].pvBuffer)
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
if(sspi_w_token[1].pvBuffer)
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
failf(data, "Failed to query security context attributes.");
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(sspi_w_token[1].cbBuffer != 1) {
|
||
|
|
failf(data, "Invalid SSPI encryption response length (%lu).",
|
||
|
|
(unsigned long)sspi_w_token[1].cbBuffer);
|
||
|
|
if(sspi_w_token[0].pvBuffer)
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
if(sspi_w_token[1].pvBuffer)
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
|
||
|
|
memcpy(socksreq, sspi_w_token[1].pvBuffer, sspi_w_token[1].cbBuffer);
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[1].pvBuffer);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if(sspi_w_token[0].cbBuffer != 1) {
|
||
|
|
failf(data, "Invalid SSPI encryption response length (%lu).",
|
||
|
|
(unsigned long)sspi_w_token[0].cbBuffer);
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
return CURLE_COULDNT_CONNECT;
|
||
|
|
}
|
||
|
|
memcpy(socksreq, sspi_w_token[0].pvBuffer, sspi_w_token[0].cbBuffer);
|
||
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].pvBuffer);
|
||
|
|
}
|
||
|
|
|
||
|
|
infof(data, "SOCKS5 access with%s protection granted.\n",
|
||
|
|
(socksreq[0] == 0)?"out GSS-API data":
|
||
|
|
((socksreq[0] == 1)?" GSS-API integrity":" GSS-API confidentiality"));
|
||
|
|
|
||
|
|
/* For later use if encryption is required
|
||
|
|
conn->socks5_gssapi_enctype = socksreq[0];
|
||
|
|
if(socksreq[0] != 0)
|
||
|
|
conn->socks5_sspi_context = sspi_context;
|
||
|
|
else {
|
||
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
||
|
|
conn->socks5_sspi_context = sspi_context;
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
return CURLE_OK;
|
||
|
|
}
|
||
|
|
#endif
|