697 lines
25 KiB
C
697 lines
25 KiB
C
/***************************************************************************
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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) 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 http://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 "setup.h"
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#ifdef USE_WINDOWS_SSPI
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#include <string.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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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 "timeval.h"
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#include "socks.h"
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#include "curl_sspi.h"
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#define _MPRINTF_REPLACE /* use the internal *printf() functions */
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#include <curl/mprintf.h>
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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/*
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* Definitions required from ntsecapi.h are directly provided below this point
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* to avoid including ntsecapi.h due to a conflict with OpenSSL's safestack.h
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*/
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#define KERB_WRAP_NO_ENCRYPT 0x80000001
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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 SessionHandle *data,
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SECURITY_STATUS major_status,
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SECURITY_STATUS minor_status,
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const char* function)
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{
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const char *txt;
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(void)minor_status;
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if(major_status != SEC_E_OK &&
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major_status != SEC_I_COMPLETE_AND_CONTINUE &&
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major_status != SEC_I_COMPLETE_NEEDED &&
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major_status != SEC_I_CONTINUE_NEEDED) {
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failf(data, "SSPI error: %s failed: %d\n", function, major_status);
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switch (major_status) {
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case SEC_I_COMPLETE_AND_CONTINUE:
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txt="SEC_I_COMPLETE_AND_CONTINUE";
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break;
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case SEC_I_COMPLETE_NEEDED:
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txt="SEC_I_COMPLETE_NEEDED";
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break;
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case SEC_I_CONTINUE_NEEDED:
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txt="SEC_I_CONTINUE_NEEDED";
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break;
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case SEC_I_CONTEXT_EXPIRED:
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txt="SEC_I_CONTEXT_EXPIRED";
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break;
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case SEC_I_INCOMPLETE_CREDENTIALS:
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txt="SEC_I_INCOMPLETE_CREDENTIALS";
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break;
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case SEC_I_RENEGOTIATE:
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txt="SEC_I_RENEGOTIATE";
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break;
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case SEC_E_BUFFER_TOO_SMALL:
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txt="SEC_E_BUFFER_TOO_SMALL";
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break;
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case SEC_E_CONTEXT_EXPIRED:
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txt="SEC_E_CONTEXT_EXPIRED";
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break;
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case SEC_E_CRYPTO_SYSTEM_INVALID:
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txt="SEC_E_CRYPTO_SYSTEM_INVALID";
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break;
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case SEC_E_INCOMPLETE_MESSAGE:
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txt="SEC_E_INCOMPLETE_MESSAGE";
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break;
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case SEC_E_INSUFFICIENT_MEMORY:
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txt="SEC_E_INSUFFICIENT_MEMORY";
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break;
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case SEC_E_INTERNAL_ERROR:
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txt="SEC_E_INTERNAL_ERROR";
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break;
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case SEC_E_INVALID_HANDLE:
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txt="SEC_E_INVALID_HANDLE";
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break;
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case SEC_E_INVALID_TOKEN:
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txt="SEC_E_INVALID_TOKEN";
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break;
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case SEC_E_LOGON_DENIED:
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txt="SEC_E_LOGON_DENIED";
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break;
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case SEC_E_MESSAGE_ALTERED:
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txt="SEC_E_MESSAGE_ALTERED";
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break;
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case SEC_E_NO_AUTHENTICATING_AUTHORITY:
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txt="SEC_E_NO_AUTHENTICATING_AUTHORITY";
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break;
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case SEC_E_NO_CREDENTIALS:
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txt="SEC_E_NO_CREDENTIALS";
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break;
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case SEC_E_NOT_OWNER:
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txt="SEC_E_NOT_OWNER";
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break;
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case SEC_E_OUT_OF_SEQUENCE:
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txt="SEC_E_OUT_OF_SEQUENCE";
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break;
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case SEC_E_QOP_NOT_SUPPORTED:
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txt="SEC_E_QOP_NOT_SUPPORTED";
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break;
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case SEC_E_SECPKG_NOT_FOUND:
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txt="SEC_E_SECPKG_NOT_FOUND";
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break;
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case SEC_E_TARGET_UNKNOWN:
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txt="SEC_E_TARGET_UNKNOWN";
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break;
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case SEC_E_UNKNOWN_CREDENTIALS:
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txt="SEC_E_UNKNOWN_CREDENTIALS";
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break;
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case SEC_E_UNSUPPORTED_FUNCTION:
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txt="SEC_E_UNSUPPORTED_FUNCTION";
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break;
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case SEC_E_WRONG_PRINCIPAL:
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txt="SEC_E_WRONG_PRINCIPAL";
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break;
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default:
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txt="Unknown error";
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}
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failf(data, "SSPI error: %s failed: %s\n", function, txt);
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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 SessionHandle *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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long timeout;
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/* Needs GSSAPI authentication */
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SECURITY_STATUS sspi_major_status, sspi_minor_status=0;
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unsigned long sspi_ret_flags=0;
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int 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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ULONG qop;
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unsigned char socksreq[4]; /* room for gssapi exchange header only */
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char *service = data->set.str[STRING_SOCKS5_GSSAPI_SERVICE];
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/* get timeout */
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timeout = Curl_timeleft(data, NULL, TRUE);
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/* GSSAPI 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 = malloc(strlen(service));
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if(!service_name)
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return CURLE_OUT_OF_MEMORY;
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memcpy(service_name, service, strlen(service));
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}
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else {
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service_name = malloc(strlen(service) + strlen(conn->proxy.name) + 2);
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if(!service_name)
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return CURLE_OUT_OF_MEMORY;
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snprintf(service_name,strlen(service) +strlen(conn->proxy.name)+2,"%s/%s",
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service,conn->proxy.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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sspi_major_status = s_pSecFn->AcquireCredentialsHandleA( NULL,
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(char *)"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(data, sspi_major_status,sspi_minor_status,
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"AcquireCredentialsHandleA") ) {
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failf(data, "Failed to acquire credentials.");
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free(service_name);
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service_name=NULL;
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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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sspi_major_status = s_pSecFn->InitializeSecurityContextA(
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&cred_handle,
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context_handle,
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service_name,
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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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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(data,sspi_major_status,sspi_minor_status,
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"InitializeSecurityContextA") ){
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free(service_name);
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service_name=NULL;
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s_pSecFn->FreeCredentialsHandle(&cred_handle);
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s_pSecFn->DeleteSecurityContext(&sspi_context);
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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; /* gssapi 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 != CURLE_OK) || (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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service_name=NULL;
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s_pSecFn->FreeContextBuffer(sspi_send_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 != CURLE_OK) || (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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service_name=NULL;
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s_pSecFn->FreeContextBuffer(sspi_send_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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s_pSecFn->FreeContextBuffer(sspi_send_token.pvBuffer);
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sspi_send_token.pvBuffer = NULL;
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sspi_send_token.cbBuffer = 0;
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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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if(sspi_major_status != SEC_I_CONTINUE_NEEDED) break;
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/* analyse response */
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/* GSSAPI 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,
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&actualread, timeout);
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if(result != CURLE_OK || 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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service_name=NULL;
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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 (%d %d).",
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socksreq[0], socksreq[1]);
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free(service_name);
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service_name=NULL;
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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 (%d %d).",
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socksreq[0], socksreq[1]);
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free(service_name);
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service_name=NULL;
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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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service_name=NULL;
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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,
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&actualread, timeout);
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if(result != CURLE_OK || 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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service_name=NULL;
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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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service_name=NULL;
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/* Everything is good so far, user was authenticated! */
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sspi_major_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(data,sspi_major_status,sspi_minor_status,
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"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 gssapi.\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; /* gssapi 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 gssapi %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
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* protected with gss_seal()/gss_wrap(). See RFC1961 extract below
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* The NEC reference implementations on which this is based is
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* therefore at fault
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*
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* +------+------+------+.......................+
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* + ver | mtyp | len | token |
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* +------+------+------+.......................+
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* + 0x01 | 0x02 | 0x02 | up to 2^16 - 1 octets |
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* +------+------+------+.......................+
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*
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* Where:
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*
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* - "ver" is the protocol version number, here 1 to represent the
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* first version of the SOCKS/GSS-API protocol
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*
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* - "mtyp" is the message type, here 2 to represent a protection
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* -level negotiation message
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*
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* - "len" is the length of the "token" field in octets
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*
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* - "token" is the GSS-API encapsulated protection level
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*
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* The token is produced by encapsulating an octet containing the
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* required protection level using gss_seal()/gss_wrap() with conf_req
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* set to FALSE. The token is verified using gss_unseal()/
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* gss_unwrap().
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*
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*/
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if(data->set.socks5_gssapi_nec) {
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us_length = htons((short)1);
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memcpy(socksreq+2, &us_length, sizeof(short));
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}
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else {
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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, timeout);
|
|
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, timeout);
|
|
|
|
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
|