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57d6d253a1
curl/lib/socks_sspi.c
Daniel Stenberg 0eb3d15ccb code cleanup: we prefer 'CURLcode result' 
... for the local variable name in functions holding the return
code. Using the same name universally makes code easier to read and
follow.

Also, unify code for checking for CURLcode errors with:

 if(result) or if(!result)

instead of

 if(result == CURLE_OK), if(CURLE_OK == result) or if(result != CURLE_OK)
2014-10-24 08:23:19 +02:00

605 lines
22 KiB
C
Raw Blame History

/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2009, 2011, Markus Moeller, <markus_moeller@compuserve.com>
* Copyright (C) 2012 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* 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 http://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"
#define _MPRINTF_REPLACE /* use the internal *printf() functions */
#include <curl/mprintf.h>
#include "curl_memory.h"
/* The last #include file should be: */
#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 SessionHandle *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;
int 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 */
char *service = data->set.str[STRING_SOCKS5_GSSAPI_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 = malloc(strlen(service));
if(!service_name)
return CURLE_OUT_OF_MEMORY;
memcpy(service_name, service, strlen(service));
}
else {
service_name = malloc(strlen(service) + strlen(conn->proxy.name) + 2);
if(!service_name)
return CURLE_OUT_OF_MEMORY;
snprintf(service_name,strlen(service) +strlen(conn->proxy.name)+2,"%s/%s",
service,conn->proxy.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.");
Curl_safefree(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")) {
Curl_safefree(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.");
Curl_safefree(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.");
Curl_safefree(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.");
Curl_safefree(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]);
Curl_safefree(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]);
Curl_safefree(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) {
Curl_safefree(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.");
Curl_safefree(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;
}
Curl_safefree(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
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