Files correlati : Commento : Spostamento in libraries delle librerie esterne di Campo per una maggiore pulizia e organizzazione git-svn-id: svn://10.65.10.50/branches/R_10_00@24150 c028cbd2-c16b-5b4b-a496-9718f37d4682
		
			
				
	
	
		
			606 lines
		
	
	
		
			22 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			606 lines
		
	
	
		
			22 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
/***************************************************************************
 | 
						|
 *                                  _   _ ____  _
 | 
						|
 *  Project                     ___| | | |  _ \| |
 | 
						|
 *                             / __| | | | |_) | |
 | 
						|
 *                            | (__| |_| |  _ <| |___
 | 
						|
 *                             \___|\___/|_| \_\_____|
 | 
						|
 *
 | 
						|
 * Copyright (C) 2012 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
 | 
						|
 * Copyright (C) 2009, 2011, Markus Moeller, <markus_moeller@compuserve.com>
 | 
						|
 *
 | 
						|
 * This software is licensed as described in the file COPYING, which
 | 
						|
 * you should have received as part of this distribution. The terms
 | 
						|
 * are also available at https://curl.haxx.se/docs/copyright.html.
 | 
						|
 *
 | 
						|
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 | 
						|
 * copies of the Software, and permit persons to whom the Software is
 | 
						|
 * furnished to do so, under the terms of the COPYING file.
 | 
						|
 *
 | 
						|
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 | 
						|
 * KIND, either express or implied.
 | 
						|
 *
 | 
						|
 ***************************************************************************/
 | 
						|
 | 
						|
#include "curl_setup.h"
 | 
						|
 | 
						|
#if defined(USE_WINDOWS_SSPI) && !defined(CURL_DISABLE_PROXY)
 | 
						|
 | 
						|
#include "urldata.h"
 | 
						|
#include "sendf.h"
 | 
						|
#include "connect.h"
 | 
						|
#include "strerror.h"
 | 
						|
#include "timeval.h"
 | 
						|
#include "socks.h"
 | 
						|
#include "curl_sspi.h"
 | 
						|
#include "curl_multibyte.h"
 | 
						|
#include "warnless.h"
 | 
						|
#include "strdup.h"
 | 
						|
/* The last 3 #include files should be in this order */
 | 
						|
#include "curl_printf.h"
 | 
						|
#include "curl_memory.h"
 | 
						|
#include "memdebug.h"
 | 
						|
 | 
						|
/*
 | 
						|
 * Helper sspi error functions.
 | 
						|
 */
 | 
						|
static int check_sspi_err(struct connectdata *conn,
 | 
						|
                          SECURITY_STATUS status,
 | 
						|
                          const char *function)
 | 
						|
{
 | 
						|
  if(status != SEC_E_OK &&
 | 
						|
     status != SEC_I_COMPLETE_AND_CONTINUE &&
 | 
						|
     status != SEC_I_COMPLETE_NEEDED &&
 | 
						|
     status != SEC_I_CONTINUE_NEEDED) {
 | 
						|
    failf(conn->data, "SSPI error: %s failed: %s", function,
 | 
						|
          Curl_sspi_strerror(conn, status));
 | 
						|
    return 1;
 | 
						|
  }
 | 
						|
  return 0;
 | 
						|
}
 | 
						|
 | 
						|
/* This is the SSPI-using version of this function */
 | 
						|
CURLcode Curl_SOCKS5_gssapi_negotiate(int sockindex,
 | 
						|
                                      struct connectdata *conn)
 | 
						|
{
 | 
						|
  struct Curl_easy *data = conn->data;
 | 
						|
  curl_socket_t sock = conn->sock[sockindex];
 | 
						|
  CURLcode code;
 | 
						|
  ssize_t actualread;
 | 
						|
  ssize_t written;
 | 
						|
  int result;
 | 
						|
  /* Needs GSS-API authentication */
 | 
						|
  SECURITY_STATUS status;
 | 
						|
  unsigned long sspi_ret_flags = 0;
 | 
						|
  unsigned char gss_enc;
 | 
						|
  SecBuffer sspi_send_token, sspi_recv_token, sspi_w_token[3];
 | 
						|
  SecBufferDesc input_desc, output_desc, wrap_desc;
 | 
						|
  SecPkgContext_Sizes sspi_sizes;
 | 
						|
  CredHandle cred_handle;
 | 
						|
  CtxtHandle sspi_context;
 | 
						|
  PCtxtHandle context_handle = NULL;
 | 
						|
  SecPkgCredentials_Names names;
 | 
						|
  TimeStamp expiry;
 | 
						|
  char *service_name = NULL;
 | 
						|
  unsigned short us_length;
 | 
						|
  unsigned long qop;
 | 
						|
  unsigned char socksreq[4]; /* room for GSS-API exchange header only */
 | 
						|
  const char *service = data->set.str[STRING_PROXY_SERVICE_NAME] ?
 | 
						|
                        data->set.str[STRING_PROXY_SERVICE_NAME]  : "rcmd";
 | 
						|
  const size_t service_length = strlen(service);
 | 
						|
 | 
						|
  /*   GSS-API request looks like
 | 
						|
   * +----+------+-----+----------------+
 | 
						|
   * |VER | MTYP | LEN |     TOKEN      |
 | 
						|
   * +----+------+----------------------+
 | 
						|
   * | 1  |  1   |  2  | up to 2^16 - 1 |
 | 
						|
   * +----+------+-----+----------------+
 | 
						|
   */
 | 
						|
 | 
						|
  /* prepare service name */
 | 
						|
  if(strchr(service, '/')) {
 | 
						|
    service_name = strdup(service);
 | 
						|
    if(!service_name)
 | 
						|
      return CURLE_OUT_OF_MEMORY;
 | 
						|
  }
 | 
						|
  else {
 | 
						|
    service_name = malloc(service_length +
 | 
						|
                          strlen(conn->socks_proxy.host.name) + 2);
 | 
						|
    if(!service_name)
 | 
						|
      return CURLE_OUT_OF_MEMORY;
 | 
						|
    snprintf(service_name, service_length +
 | 
						|
             strlen(conn->socks_proxy.host.name) + 2, "%s/%s",
 | 
						|
             service, conn->socks_proxy.host.name);
 | 
						|
  }
 | 
						|
 | 
						|
  input_desc.cBuffers = 1;
 | 
						|
  input_desc.pBuffers = &sspi_recv_token;
 | 
						|
  input_desc.ulVersion = SECBUFFER_VERSION;
 | 
						|
 | 
						|
  sspi_recv_token.BufferType = SECBUFFER_TOKEN;
 | 
						|
  sspi_recv_token.cbBuffer = 0;
 | 
						|
  sspi_recv_token.pvBuffer = NULL;
 | 
						|
 | 
						|
  output_desc.cBuffers = 1;
 | 
						|
  output_desc.pBuffers = &sspi_send_token;
 | 
						|
  output_desc.ulVersion = SECBUFFER_VERSION;
 | 
						|
 | 
						|
  sspi_send_token.BufferType = SECBUFFER_TOKEN;
 | 
						|
  sspi_send_token.cbBuffer = 0;
 | 
						|
  sspi_send_token.pvBuffer = NULL;
 | 
						|
 | 
						|
  wrap_desc.cBuffers = 3;
 | 
						|
  wrap_desc.pBuffers = sspi_w_token;
 | 
						|
  wrap_desc.ulVersion = SECBUFFER_VERSION;
 | 
						|
 | 
						|
  cred_handle.dwLower = 0;
 | 
						|
  cred_handle.dwUpper = 0;
 | 
						|
 | 
						|
  status = s_pSecFn->AcquireCredentialsHandle(NULL,
 | 
						|
                                              (TCHAR *) TEXT("Kerberos"),
 | 
						|
                                              SECPKG_CRED_OUTBOUND,
 | 
						|
                                              NULL,
 | 
						|
                                              NULL,
 | 
						|
                                              NULL,
 | 
						|
                                              NULL,
 | 
						|
                                              &cred_handle,
 | 
						|
                                              &expiry);
 | 
						|
 | 
						|
  if(check_sspi_err(conn, status, "AcquireCredentialsHandle")) {
 | 
						|
    failf(data, "Failed to acquire credentials.");
 | 
						|
    free(service_name);
 | 
						|
    s_pSecFn->FreeCredentialsHandle(&cred_handle);
 | 
						|
    return CURLE_COULDNT_CONNECT;
 | 
						|
  }
 | 
						|
 | 
						|
  /* As long as we need to keep sending some context info, and there's no  */
 | 
						|
  /* errors, keep sending it...                                            */
 | 
						|
  for(;;) {
 | 
						|
    TCHAR *sname;
 | 
						|
 | 
						|
    sname = Curl_convert_UTF8_to_tchar(service_name);
 | 
						|
    if(!sname)
 | 
						|
      return CURLE_OUT_OF_MEMORY;
 | 
						|
 | 
						|
    status = s_pSecFn->InitializeSecurityContext(&cred_handle,
 | 
						|
                                                 context_handle,
 | 
						|
                                                 sname,
 | 
						|
                                                 ISC_REQ_MUTUAL_AUTH |
 | 
						|
                                                 ISC_REQ_ALLOCATE_MEMORY |
 | 
						|
                                                 ISC_REQ_CONFIDENTIALITY |
 | 
						|
                                                 ISC_REQ_REPLAY_DETECT,
 | 
						|
                                                 0,
 | 
						|
                                                 SECURITY_NATIVE_DREP,
 | 
						|
                                                 &input_desc,
 | 
						|
                                                 0,
 | 
						|
                                                 &sspi_context,
 | 
						|
                                                 &output_desc,
 | 
						|
                                                 &sspi_ret_flags,
 | 
						|
                                                 &expiry);
 | 
						|
 | 
						|
    Curl_unicodefree(sname);
 | 
						|
 | 
						|
    if(sspi_recv_token.pvBuffer) {
 | 
						|
      s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
 | 
						|
      sspi_recv_token.pvBuffer = NULL;
 | 
						|
      sspi_recv_token.cbBuffer = 0;
 | 
						|
    }
 | 
						|
 | 
						|
    if(check_sspi_err(conn, status, "InitializeSecurityContext")) {
 | 
						|
      free(service_name);
 | 
						|
      s_pSecFn->FreeCredentialsHandle(&cred_handle);
 | 
						|
      s_pSecFn->DeleteSecurityContext(&sspi_context);
 | 
						|
      if(sspi_recv_token.pvBuffer)
 | 
						|
        s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
 | 
						|
      failf(data, "Failed to initialise security context.");
 | 
						|
      return CURLE_COULDNT_CONNECT;
 | 
						|
    }
 | 
						|
 | 
						|
    if(sspi_send_token.cbBuffer != 0) {
 | 
						|
      socksreq[0] = 1;    /* GSS-API subnegotiation version */
 | 
						|
      socksreq[1] = 1;    /* authentication message type */
 | 
						|
      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 authentication request.");
 | 
						|
        free(service_name);
 | 
						|
        if(sspi_send_token.pvBuffer)
 | 
						|
          s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
 | 
						|
        if(sspi_recv_token.pvBuffer)
 | 
						|
          s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
 | 
						|
        s_pSecFn->FreeCredentialsHandle(&cred_handle);
 | 
						|
        s_pSecFn->DeleteSecurityContext(&sspi_context);
 | 
						|
        return CURLE_COULDNT_CONNECT;
 | 
						|
      }
 | 
						|
 | 
						|
      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 authentication token.");
 | 
						|
        free(service_name);
 | 
						|
        if(sspi_send_token.pvBuffer)
 | 
						|
          s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
 | 
						|
        if(sspi_recv_token.pvBuffer)
 | 
						|
          s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
 | 
						|
        s_pSecFn->FreeCredentialsHandle(&cred_handle);
 | 
						|
        s_pSecFn->DeleteSecurityContext(&sspi_context);
 | 
						|
        return CURLE_COULDNT_CONNECT;
 | 
						|
      }
 | 
						|
 | 
						|
    }
 | 
						|
 | 
						|
    if(sspi_send_token.pvBuffer) {
 | 
						|
      s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
 | 
						|
      sspi_send_token.pvBuffer = NULL;
 | 
						|
    }
 | 
						|
    sspi_send_token.cbBuffer = 0;
 | 
						|
 | 
						|
    if(sspi_recv_token.pvBuffer) {
 | 
						|
      s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
 | 
						|
      sspi_recv_token.pvBuffer = NULL;
 | 
						|
    }
 | 
						|
    sspi_recv_token.cbBuffer = 0;
 | 
						|
 | 
						|
    if(status != SEC_I_CONTINUE_NEEDED)
 | 
						|
      break;
 | 
						|
 | 
						|
    /* analyse response */
 | 
						|
 | 
						|
    /*   GSS-API response looks like
 | 
						|
     * +----+------+-----+----------------+
 | 
						|
     * |VER | MTYP | LEN |     TOKEN      |
 | 
						|
     * +----+------+----------------------+
 | 
						|
     * | 1  |  1   |  2  | up to 2^16 - 1 |
 | 
						|
     * +----+------+-----+----------------+
 | 
						|
     */
 | 
						|
 | 
						|
    result = Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread);
 | 
						|
    if(result || (actualread != 4)) {
 | 
						|
      failf(data, "Failed to receive SSPI authentication response.");
 | 
						|
      free(service_name);
 | 
						|
      s_pSecFn->FreeCredentialsHandle(&cred_handle);
 | 
						|
      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]);
 | 
						|
      free(service_name);
 | 
						|
      s_pSecFn->FreeCredentialsHandle(&cred_handle);
 | 
						|
      s_pSecFn->DeleteSecurityContext(&sspi_context);
 | 
						|
      return CURLE_COULDNT_CONNECT;
 | 
						|
    }
 | 
						|
 | 
						|
    if(socksreq[1] != 1) { /* status / messgae type */
 | 
						|
      failf(data, "Invalid SSPI authentication response type (%u %u).",
 | 
						|
            (unsigned int)socksreq[0], (unsigned int)socksreq[1]);
 | 
						|
      free(service_name);
 | 
						|
      s_pSecFn->FreeCredentialsHandle(&cred_handle);
 | 
						|
      s_pSecFn->DeleteSecurityContext(&sspi_context);
 | 
						|
      return CURLE_COULDNT_CONNECT;
 | 
						|
    }
 | 
						|
 | 
						|
    memcpy(&us_length, socksreq + 2, sizeof(short));
 | 
						|
    us_length = ntohs(us_length);
 | 
						|
 | 
						|
    sspi_recv_token.cbBuffer = us_length;
 | 
						|
    sspi_recv_token.pvBuffer = malloc(us_length);
 | 
						|
 | 
						|
    if(!sspi_recv_token.pvBuffer) {
 | 
						|
      free(service_name);
 | 
						|
      s_pSecFn->FreeCredentialsHandle(&cred_handle);
 | 
						|
      s_pSecFn->DeleteSecurityContext(&sspi_context);
 | 
						|
      return CURLE_OUT_OF_MEMORY;
 | 
						|
    }
 | 
						|
    result = Curl_blockread_all(conn, sock, (char *)sspi_recv_token.pvBuffer,
 | 
						|
                                sspi_recv_token.cbBuffer, &actualread);
 | 
						|
 | 
						|
    if(result || (actualread != us_length)) {
 | 
						|
      failf(data, "Failed to receive SSPI authentication token.");
 | 
						|
      free(service_name);
 | 
						|
      if(sspi_recv_token.pvBuffer)
 | 
						|
        s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
 | 
						|
      s_pSecFn->FreeCredentialsHandle(&cred_handle);
 | 
						|
      s_pSecFn->DeleteSecurityContext(&sspi_context);
 | 
						|
      return CURLE_COULDNT_CONNECT;
 | 
						|
    }
 | 
						|
 | 
						|
    context_handle = &sspi_context;
 | 
						|
  }
 | 
						|
 | 
						|
  free(service_name);
 | 
						|
 | 
						|
  /* Everything is good so far, user was authenticated! */
 | 
						|
  status = s_pSecFn->QueryCredentialsAttributes(&cred_handle,
 | 
						|
                                                SECPKG_CRED_ATTR_NAMES,
 | 
						|
                                                &names);
 | 
						|
  s_pSecFn->FreeCredentialsHandle(&cred_handle);
 | 
						|
  if(check_sspi_err(conn, status, "QueryCredentialAttributes")) {
 | 
						|
    s_pSecFn->DeleteSecurityContext(&sspi_context);
 | 
						|
    s_pSecFn->FreeContextBuffer(names.sUserName);
 | 
						|
    failf(data, "Failed to determine user name.");
 | 
						|
    return CURLE_COULDNT_CONNECT;
 | 
						|
  }
 | 
						|
  infof(data, "SOCKS5 server authencticated user %s with GSS-API.\n",
 | 
						|
        names.sUserName);
 | 
						|
  s_pSecFn->FreeContextBuffer(names.sUserName);
 | 
						|
 | 
						|
  /* Do encryption */
 | 
						|
  socksreq[0] = 1;    /* GSS-API subnegotiation version */
 | 
						|
  socksreq[1] = 2;    /* encryption message type */
 | 
						|
 | 
						|
  gss_enc = 0; /* no data protection */
 | 
						|
  /* do confidentiality protection if supported */
 | 
						|
  if(sspi_ret_flags & ISC_REQ_CONFIDENTIALITY)
 | 
						|
    gss_enc = 2;
 | 
						|
  /* else do integrity protection */
 | 
						|
  else if(sspi_ret_flags & ISC_REQ_INTEGRITY)
 | 
						|
    gss_enc = 1;
 | 
						|
 | 
						|
  infof(data, "SOCKS5 server supports GSS-API %s data protection.\n",
 | 
						|
        (gss_enc == 0)?"no":((gss_enc == 1)?"integrity":"confidentiality") );
 | 
						|
  /* force to no data protection, avoid encryption/decryption for now */
 | 
						|
  gss_enc = 0;
 | 
						|
  /*
 | 
						|
   * 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
 |