687 строки
24 KiB
C
687 строки
24 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* 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 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 "setup.h"
|
|
|
|
#ifdef USE_WINDOWS_SSPI
|
|
|
|
#include "urldata.h"
|
|
#include "sendf.h"
|
|
#include "connect.h"
|
|
#include "timeval.h"
|
|
#include "socks.h"
|
|
#include "curl_sspi.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"
|
|
|
|
/*
|
|
* Definitions required from ntsecapi.h are directly provided below this point
|
|
* to avoid including ntsecapi.h due to a conflict with OpenSSL's safestack.h
|
|
*/
|
|
#define KERB_WRAP_NO_ENCRYPT 0x80000001
|
|
|
|
/*
|
|
* Helper sspi error functions.
|
|
*/
|
|
static int check_sspi_err(struct SessionHandle *data,
|
|
SECURITY_STATUS major_status,
|
|
SECURITY_STATUS minor_status,
|
|
const char* function)
|
|
{
|
|
const char *txt;
|
|
(void)minor_status;
|
|
|
|
if(major_status != SEC_E_OK &&
|
|
major_status != SEC_I_COMPLETE_AND_CONTINUE &&
|
|
major_status != SEC_I_COMPLETE_NEEDED &&
|
|
major_status != SEC_I_CONTINUE_NEEDED) {
|
|
failf(data, "SSPI error: %s failed: %d\n", function, major_status);
|
|
switch (major_status) {
|
|
case SEC_I_COMPLETE_AND_CONTINUE:
|
|
txt="SEC_I_COMPLETE_AND_CONTINUE";
|
|
break;
|
|
case SEC_I_COMPLETE_NEEDED:
|
|
txt="SEC_I_COMPLETE_NEEDED";
|
|
break;
|
|
case SEC_I_CONTINUE_NEEDED:
|
|
txt="SEC_I_CONTINUE_NEEDED";
|
|
break;
|
|
case SEC_I_CONTEXT_EXPIRED:
|
|
txt="SEC_I_CONTEXT_EXPIRED";
|
|
break;
|
|
case SEC_I_INCOMPLETE_CREDENTIALS:
|
|
txt="SEC_I_INCOMPLETE_CREDENTIALS";
|
|
break;
|
|
case SEC_I_RENEGOTIATE:
|
|
txt="SEC_I_RENEGOTIATE";
|
|
break;
|
|
case SEC_E_BUFFER_TOO_SMALL:
|
|
txt="SEC_E_BUFFER_TOO_SMALL";
|
|
break;
|
|
case SEC_E_CONTEXT_EXPIRED:
|
|
txt="SEC_E_CONTEXT_EXPIRED";
|
|
break;
|
|
case SEC_E_CRYPTO_SYSTEM_INVALID:
|
|
txt="SEC_E_CRYPTO_SYSTEM_INVALID";
|
|
break;
|
|
case SEC_E_INCOMPLETE_MESSAGE:
|
|
txt="SEC_E_INCOMPLETE_MESSAGE";
|
|
break;
|
|
case SEC_E_INSUFFICIENT_MEMORY:
|
|
txt="SEC_E_INSUFFICIENT_MEMORY";
|
|
break;
|
|
case SEC_E_INTERNAL_ERROR:
|
|
txt="SEC_E_INTERNAL_ERROR";
|
|
break;
|
|
case SEC_E_INVALID_HANDLE:
|
|
txt="SEC_E_INVALID_HANDLE";
|
|
break;
|
|
case SEC_E_INVALID_TOKEN:
|
|
txt="SEC_E_INVALID_TOKEN";
|
|
break;
|
|
case SEC_E_LOGON_DENIED:
|
|
txt="SEC_E_LOGON_DENIED";
|
|
break;
|
|
case SEC_E_MESSAGE_ALTERED:
|
|
txt="SEC_E_MESSAGE_ALTERED";
|
|
break;
|
|
case SEC_E_NO_AUTHENTICATING_AUTHORITY:
|
|
txt="SEC_E_NO_AUTHENTICATING_AUTHORITY";
|
|
break;
|
|
case SEC_E_NO_CREDENTIALS:
|
|
txt="SEC_E_NO_CREDENTIALS";
|
|
break;
|
|
case SEC_E_NOT_OWNER:
|
|
txt="SEC_E_NOT_OWNER";
|
|
break;
|
|
case SEC_E_OUT_OF_SEQUENCE:
|
|
txt="SEC_E_OUT_OF_SEQUENCE";
|
|
break;
|
|
case SEC_E_QOP_NOT_SUPPORTED:
|
|
txt="SEC_E_QOP_NOT_SUPPORTED";
|
|
break;
|
|
case SEC_E_SECPKG_NOT_FOUND:
|
|
txt="SEC_E_SECPKG_NOT_FOUND";
|
|
break;
|
|
case SEC_E_TARGET_UNKNOWN:
|
|
txt="SEC_E_TARGET_UNKNOWN";
|
|
break;
|
|
case SEC_E_UNKNOWN_CREDENTIALS:
|
|
txt="SEC_E_UNKNOWN_CREDENTIALS";
|
|
break;
|
|
case SEC_E_UNSUPPORTED_FUNCTION:
|
|
txt="SEC_E_UNSUPPORTED_FUNCTION";
|
|
break;
|
|
case SEC_E_WRONG_PRINCIPAL:
|
|
txt="SEC_E_WRONG_PRINCIPAL";
|
|
break;
|
|
default:
|
|
txt="Unknown error";
|
|
|
|
}
|
|
failf(data, "SSPI error: %s failed: %s\n", function, txt);
|
|
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 GSSAPI authentication */
|
|
SECURITY_STATUS sspi_major_status, sspi_minor_status=0;
|
|
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;
|
|
ULONG qop;
|
|
unsigned char socksreq[4]; /* room for gssapi exchange header only */
|
|
char *service = data->set.str[STRING_SOCKS5_GSSAPI_SERVICE];
|
|
|
|
/* GSSAPI 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;
|
|
|
|
sspi_major_status =
|
|
s_pSecFn->AcquireCredentialsHandleA( NULL,
|
|
(char *)"Kerberos",
|
|
SECPKG_CRED_OUTBOUND,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
&cred_handle,
|
|
&expiry);
|
|
|
|
if(check_sspi_err(data, sspi_major_status,sspi_minor_status,
|
|
"AcquireCredentialsHandleA") ) {
|
|
failf(data, "Failed to acquire credentials.");
|
|
free(service_name);
|
|
service_name=NULL;
|
|
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(;;) {
|
|
|
|
sspi_major_status = s_pSecFn->InitializeSecurityContextA(
|
|
&cred_handle,
|
|
context_handle,
|
|
service_name,
|
|
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);
|
|
|
|
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(data,sspi_major_status,sspi_minor_status,
|
|
"InitializeSecurityContextA") ) {
|
|
free(service_name);
|
|
service_name=NULL;
|
|
s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
|
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; /* gssapi 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 != CURLE_OK) || (4 != written)) {
|
|
failf(data, "Failed to send SSPI authentication request.");
|
|
free(service_name);
|
|
service_name=NULL;
|
|
s_pSecFn->FreeContextBuffer(sspi_send_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 != CURLE_OK) || (sspi_send_token.cbBuffer != (size_t)written)) {
|
|
failf(data, "Failed to send SSPI authentication token.");
|
|
free(service_name);
|
|
service_name=NULL;
|
|
s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
|
s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
|
|
s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
|
return CURLE_COULDNT_CONNECT;
|
|
}
|
|
|
|
}
|
|
|
|
s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
|
sspi_send_token.pvBuffer = NULL;
|
|
sspi_send_token.cbBuffer = 0;
|
|
s_pSecFn->FreeContextBuffer(sspi_recv_token.pvBuffer);
|
|
sspi_recv_token.pvBuffer = NULL;
|
|
sspi_recv_token.cbBuffer = 0;
|
|
if(sspi_major_status != SEC_I_CONTINUE_NEEDED) break;
|
|
|
|
/* analyse response */
|
|
|
|
/* GSSAPI 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 != CURLE_OK || actualread != 4) {
|
|
failf(data, "Failed to receive SSPI authentication response.");
|
|
free(service_name);
|
|
service_name=NULL;
|
|
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 (%d %d).",
|
|
socksreq[0], socksreq[1]);
|
|
free(service_name);
|
|
service_name=NULL;
|
|
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 (%d %d).",
|
|
socksreq[0], socksreq[1]);
|
|
free(service_name);
|
|
service_name=NULL;
|
|
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);
|
|
service_name=NULL;
|
|
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 != CURLE_OK || actualread != us_length) {
|
|
failf(data, "Failed to receive SSPI authentication token.");
|
|
free(service_name);
|
|
service_name=NULL;
|
|
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);
|
|
service_name=NULL;
|
|
|
|
/* Everything is good so far, user was authenticated! */
|
|
sspi_major_status =
|
|
s_pSecFn->QueryCredentialsAttributes( &cred_handle,
|
|
SECPKG_CRED_ATTR_NAMES,
|
|
&names);
|
|
s_pSecFn->FreeCredentialsHandle(&cred_handle);
|
|
if(check_sspi_err(data,sspi_major_status,sspi_minor_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 gssapi.\n",
|
|
names.sUserName);
|
|
s_pSecFn->FreeContextBuffer(names.sUserName);
|
|
|
|
/* Do encryption */
|
|
socksreq[0] = 1; /* gssapi 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 gssapi %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 {
|
|
sspi_major_status = s_pSecFn->QueryContextAttributesA( &sspi_context,
|
|
SECPKG_ATTR_SIZES,
|
|
&sspi_sizes);
|
|
if(check_sspi_err(data,sspi_major_status,sspi_minor_status,
|
|
"QueryContextAttributesA")) {
|
|
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;
|
|
}
|
|
sspi_major_status = s_pSecFn->EncryptMessage( &sspi_context,
|
|
KERB_WRAP_NO_ENCRYPT,
|
|
&wrap_desc,
|
|
0);
|
|
if(check_sspi_err(data,sspi_major_status,sspi_minor_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 != CURLE_OK) || (4 != written)) {
|
|
failf(data, "Failed to send SSPI encryption request.");
|
|
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 != CURLE_OK) || (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 != CURLE_OK) || (sspi_send_token.cbBuffer != (size_t)written)) {
|
|
failf(data, "Failed to send SSPI encryption type.");
|
|
s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
|
s_pSecFn->DeleteSecurityContext(&sspi_context);
|
|
return CURLE_COULDNT_CONNECT;
|
|
}
|
|
s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
|
|
}
|
|
|
|
result=Curl_blockread_all(conn, sock, (char *)socksreq, 4, &actualread);
|
|
if(result != CURLE_OK || 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 (%d %d).",
|
|
socksreq[0], 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 (%d %d).",
|
|
socksreq[0], 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 != CURLE_OK || 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;
|
|
|
|
sspi_major_status = s_pSecFn->DecryptMessage( &sspi_context,
|
|
&wrap_desc,
|
|
0,
|
|
&qop);
|
|
|
|
if(check_sspi_err(data,sspi_major_status,sspi_minor_status,
|
|
"DecryptMessage")) {
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].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 (%d).",
|
|
sspi_w_token[1].cbBuffer);
|
|
s_pSecFn->FreeContextBuffer(sspi_w_token[0].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 (%d).",
|
|
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 gssapi data":
|
|
((socksreq[0]==1)?" gssapi integrity":" gssapi 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
|