2034 lines
53 KiB
C
2034 lines
53 KiB
C
/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Network Level Authentication (NLA)
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*
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* Copyright 2010-2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
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* Copyright 2015 Thincast Technologies GmbH
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* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
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* Copyright 2016 Martin Fleisz <martin.fleisz@thincast.com>
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* Copyright 2017 Dorian Ducournau <dorian.ducournau@gmail.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <time.h>
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#ifndef _WIN32
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#include <unistd.h>
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#endif
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#include <freerdp/log.h>
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#include <freerdp/crypto/tls.h>
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#include <freerdp/build-config.h>
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#include <freerdp/peer.h>
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#include <winpr/crt.h>
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#include <winpr/sam.h>
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#include <winpr/sspi.h>
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#include <winpr/print.h>
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#include <winpr/tchar.h>
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#include <winpr/dsparse.h>
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#include <winpr/library.h>
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#include <winpr/registry.h>
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#include "nla.h"
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#define TAG FREERDP_TAG("core.nla")
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#define SERVER_KEY "Software\\"FREERDP_VENDOR_STRING"\\" \
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FREERDP_PRODUCT_STRING"\\Server"
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/**
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* TSRequest ::= SEQUENCE {
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* version [0] INTEGER,
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* negoTokens [1] NegoData OPTIONAL,
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* authInfo [2] OCTET STRING OPTIONAL,
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* pubKeyAuth [3] OCTET STRING OPTIONAL,
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* errorCode [4] INTEGER OPTIONAL
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* }
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*
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* NegoData ::= SEQUENCE OF NegoDataItem
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*
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* NegoDataItem ::= SEQUENCE {
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* negoToken [0] OCTET STRING
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* }
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*
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* TSCredentials ::= SEQUENCE {
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* credType [0] INTEGER,
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* credentials [1] OCTET STRING
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* }
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*
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* TSPasswordCreds ::= SEQUENCE {
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* domainName [0] OCTET STRING,
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* userName [1] OCTET STRING,
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* password [2] OCTET STRING
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* }
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*
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* TSSmartCardCreds ::= SEQUENCE {
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* pin [0] OCTET STRING,
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* cspData [1] TSCspDataDetail,
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* userHint [2] OCTET STRING OPTIONAL,
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* domainHint [3] OCTET STRING OPTIONAL
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* }
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*
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* TSCspDataDetail ::= SEQUENCE {
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* keySpec [0] INTEGER,
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* cardName [1] OCTET STRING OPTIONAL,
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* readerName [2] OCTET STRING OPTIONAL,
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* containerName [3] OCTET STRING OPTIONAL,
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* cspName [4] OCTET STRING OPTIONAL
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* }
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*
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*/
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#define NLA_PKG_NAME NEGO_SSP_NAME
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#define TERMSRV_SPN_PREFIX "TERMSRV/"
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static BOOL nla_send(rdpNla* nla);
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static int nla_recv(rdpNla* nla);
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static void nla_buffer_print(rdpNla* nla);
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static void nla_buffer_free(rdpNla* nla);
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static SECURITY_STATUS nla_encrypt_public_key_echo(rdpNla* nla);
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static SECURITY_STATUS nla_decrypt_public_key_echo(rdpNla* nla);
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static SECURITY_STATUS nla_encrypt_ts_credentials(rdpNla* nla);
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static SECURITY_STATUS nla_decrypt_ts_credentials(rdpNla* nla);
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static BOOL nla_read_ts_password_creds(rdpNla* nla, wStream* s);
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static void nla_identity_free(SEC_WINNT_AUTH_IDENTITY* identity);
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#define ber_sizeof_sequence_octet_string(length) ber_sizeof_contextual_tag(ber_sizeof_octet_string(length)) + ber_sizeof_octet_string(length)
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#define ber_write_sequence_octet_string(stream, context, value, length) ber_write_contextual_tag(stream, context, ber_sizeof_octet_string(length), TRUE) + ber_write_octet_string(stream, value, length)
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void nla_identity_free(SEC_WINNT_AUTH_IDENTITY* identity)
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{
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if (identity)
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{
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/* Password authentication */
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if (identity->User)
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{
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memset(identity->User, 0, identity->UserLength * 2);
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free(identity->User);
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}
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if (identity->Password)
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{
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memset(identity->Password, 0, identity->PasswordLength * 2);
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free(identity->Password);
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}
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if (identity->Domain)
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{
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memset(identity->Domain, 0, identity->DomainLength * 2);
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free(identity->Domain);
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}
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}
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free(identity);
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}
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/**
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* Initialize NTLM/Kerberos SSP authentication module (client).
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* @param credssp
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*/
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static int nla_client_init(rdpNla* nla)
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{
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char* spn;
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int length;
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rdpTls* tls = NULL;
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BOOL PromptPassword = FALSE;
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freerdp* instance = nla->instance;
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rdpSettings* settings = nla->settings;
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WINPR_SAM* sam;
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WINPR_SAM_ENTRY* entry;
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nla->state = NLA_STATE_INITIAL;
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if (settings->RestrictedAdminModeRequired)
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settings->DisableCredentialsDelegation = TRUE;
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if ((!settings->Password) || (!settings->Username)
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|| (!strlen(settings->Password)) || (!strlen(settings->Username)))
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{
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PromptPassword = TRUE;
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}
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if (PromptPassword && settings->Username && strlen(settings->Username))
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{
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sam = SamOpen(NULL, TRUE);
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if (sam)
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{
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entry = SamLookupUserA(sam, settings->Username, strlen(settings->Username), NULL, 0);
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if (entry)
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{
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/**
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* The user could be found in SAM database.
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* Use entry in SAM database later instead of prompt
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*/
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PromptPassword = FALSE;
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SamFreeEntry(sam, entry);
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}
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SamClose(sam);
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}
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}
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#ifndef _WIN32
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if (PromptPassword)
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{
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if (settings->RestrictedAdminModeRequired)
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{
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if ((settings->PasswordHash) && (strlen(settings->PasswordHash) > 0))
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PromptPassword = FALSE;
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}
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}
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#endif
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if (PromptPassword)
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{
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if (instance->Authenticate)
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{
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BOOL proceed = instance->Authenticate(instance,
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&settings->Username, &settings->Password, &settings->Domain);
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if (!proceed)
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{
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freerdp_set_last_error(instance->context, FREERDP_ERROR_CONNECT_CANCELLED);
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return 0;
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}
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}
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}
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if (!settings->Username)
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{
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nla_identity_free(nla->identity);
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nla->identity = NULL;
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}
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else
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{
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if (sspi_SetAuthIdentity(nla->identity, settings->Username, settings->Domain,
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settings->Password) < 0)
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return -1;
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}
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#ifndef _WIN32
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{
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SEC_WINNT_AUTH_IDENTITY* identity = nla->identity;
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if (!identity)
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{
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WLog_ERR(TAG, "NLA identity=%p", (void*) identity);
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return -1;
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}
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if (settings->RestrictedAdminModeRequired)
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{
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if (settings->PasswordHash)
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{
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if (strlen(settings->PasswordHash) == 32)
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{
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free(identity->Password);
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identity->PasswordLength = ConvertToUnicode(CP_UTF8, 0,
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settings->PasswordHash, -1, &identity->Password, 0) - 1;
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/**
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* Multiply password hash length by 64 to obtain a length exceeding
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* the maximum (256) and use it this for hash identification in WinPR.
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*/
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identity->PasswordLength = 32 * 64; /* 2048 */
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}
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}
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}
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}
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#endif
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tls = nla->transport->tls;
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if (!tls)
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{
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WLog_ERR(TAG, "Unknown NLA transport layer");
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return -1;
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}
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if (!sspi_SecBufferAlloc(&nla->PublicKey, tls->PublicKeyLength))
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{
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WLog_ERR(TAG, "Failed to allocate sspi secBuffer");
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return -1;
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}
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CopyMemory(nla->PublicKey.pvBuffer, tls->PublicKey, tls->PublicKeyLength);
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length = sizeof(TERMSRV_SPN_PREFIX) + strlen(settings->ServerHostname);
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spn = (SEC_CHAR*) malloc(length + 1);
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if (!spn)
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return -1;
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sprintf(spn, "%s%s", TERMSRV_SPN_PREFIX, settings->ServerHostname);
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#ifdef UNICODE
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nla->ServicePrincipalName = NULL;
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ConvertToUnicode(CP_UTF8, 0, spn, -1, &nla->ServicePrincipalName, 0);
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free(spn);
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#else
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nla->ServicePrincipalName = spn;
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#endif
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nla->table = InitSecurityInterfaceEx(0);
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#ifdef WITH_GSSAPI /* KERBEROS SSP */
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nla->status = nla->table->QuerySecurityPackageInfo(KERBEROS_SSP_NAME, &nla->pPackageInfo);
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if (nla->status != SEC_E_OK)
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{
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WLog_ERR(TAG, "QuerySecurityPackageInfo status %s [0x%08"PRIX32"]",
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GetSecurityStatusString(nla->status), nla->status);
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return -1;
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}
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#else /* NTLM SSP */
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nla->status = nla->table->QuerySecurityPackageInfo(NLA_PKG_NAME, &nla->pPackageInfo);
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if (nla->status != SEC_E_OK)
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{
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WLog_ERR(TAG, "QuerySecurityPackageInfo status %s [0x%08"PRIX32"]",
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GetSecurityStatusString(nla->status), nla->status);
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return -1;
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}
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#endif
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nla->cbMaxToken = nla->pPackageInfo->cbMaxToken;
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nla->packageName = nla->pPackageInfo->Name;
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WLog_DBG(TAG, "%s %"PRIu32" : packageName=%s ; cbMaxToken=%d", __FUNCTION__, __LINE__,
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nla->packageName, nla->cbMaxToken);
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nla->status = nla->table->AcquireCredentialsHandle(NULL, NLA_PKG_NAME,
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SECPKG_CRED_OUTBOUND, NULL, nla->identity, NULL, NULL, &nla->credentials,
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&nla->expiration);
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if (nla->status != SEC_E_OK)
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{
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WLog_ERR(TAG, "AcquireCredentialsHandle status %s [0x%08"PRIX32"]",
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GetSecurityStatusString(nla->status), nla->status);
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return -1;
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}
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nla->haveContext = FALSE;
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nla->haveInputBuffer = FALSE;
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nla->havePubKeyAuth = FALSE;
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ZeroMemory(&nla->inputBuffer, sizeof(SecBuffer));
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ZeroMemory(&nla->outputBuffer, sizeof(SecBuffer));
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ZeroMemory(&nla->ContextSizes, sizeof(SecPkgContext_Sizes));
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/*
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* from tspkg.dll: 0x00000132
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* ISC_REQ_MUTUAL_AUTH
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* ISC_REQ_CONFIDENTIALITY
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* ISC_REQ_USE_SESSION_KEY
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* ISC_REQ_ALLOCATE_MEMORY
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*/
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nla->fContextReq = ISC_REQ_MUTUAL_AUTH | ISC_REQ_CONFIDENTIALITY | ISC_REQ_USE_SESSION_KEY;
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return 1;
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}
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int nla_client_begin(rdpNla* nla)
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{
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if (nla_client_init(nla) < 1)
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return -1;
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if (nla->state != NLA_STATE_INITIAL)
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return -1;
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nla->outputBufferDesc.ulVersion = SECBUFFER_VERSION;
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nla->outputBufferDesc.cBuffers = 1;
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nla->outputBufferDesc.pBuffers = &nla->outputBuffer;
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nla->outputBuffer.BufferType = SECBUFFER_TOKEN;
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nla->outputBuffer.cbBuffer = nla->cbMaxToken;
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nla->outputBuffer.pvBuffer = malloc(nla->outputBuffer.cbBuffer);
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if (!nla->outputBuffer.pvBuffer)
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return -1;
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nla->status = nla->table->InitializeSecurityContext(&nla->credentials,
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NULL, nla->ServicePrincipalName, nla->fContextReq, 0,
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SECURITY_NATIVE_DREP, NULL, 0, &nla->context,
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&nla->outputBufferDesc, &nla->pfContextAttr, &nla->expiration);
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WLog_VRB(TAG, " InitializeSecurityContext status %s [0x%08"PRIX32"]",
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GetSecurityStatusString(nla->status), nla->status);
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/* Handle kerberos context initialization failure.
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* After kerberos failed initialize NTLM context */
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if (nla->status == SEC_E_NO_CREDENTIALS)
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{
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nla->status = nla->table->InitializeSecurityContext(&nla->credentials,
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NULL, nla->ServicePrincipalName, nla->fContextReq, 0,
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SECURITY_NATIVE_DREP, NULL, 0, &nla->context,
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&nla->outputBufferDesc, &nla->pfContextAttr, &nla->expiration);
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WLog_VRB(TAG, " InitializeSecurityContext status %s [0x%08"PRIX32"]",
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GetSecurityStatusString(nla->status), nla->status);
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if (nla->status)
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{
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SECURITY_STATUS status = nla->table->QuerySecurityPackageInfo(NTLM_SSP_NAME, &nla->pPackageInfo);
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if (status != SEC_E_OK)
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{
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WLog_ERR(TAG, "QuerySecurityPackageInfo status %s [0x%08"PRIX32"]",
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GetSecurityStatusString(nla->status), status);
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return -1;
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}
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nla->cbMaxToken = nla->pPackageInfo->cbMaxToken;
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nla->packageName = nla->pPackageInfo->Name;
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}
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}
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if ((nla->status == SEC_I_COMPLETE_AND_CONTINUE) || (nla->status == SEC_I_COMPLETE_NEEDED))
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{
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if (nla->table->CompleteAuthToken)
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{
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SECURITY_STATUS status;
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status = nla->table->CompleteAuthToken(&nla->context, &nla->outputBufferDesc);
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if (status != SEC_E_OK)
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{
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WLog_WARN(TAG, "CompleteAuthToken status %s [0x%08"PRIX32"]",
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GetSecurityStatusString(status), status);
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return -1;
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}
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}
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if (nla->status == SEC_I_COMPLETE_NEEDED)
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nla->status = SEC_E_OK;
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else if (nla->status == SEC_I_COMPLETE_AND_CONTINUE)
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nla->status = SEC_I_CONTINUE_NEEDED;
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}
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if (nla->status != SEC_I_CONTINUE_NEEDED)
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return -1;
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if (nla->outputBuffer.cbBuffer < 1)
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return -1;
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nla->negoToken.pvBuffer = nla->outputBuffer.pvBuffer;
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nla->negoToken.cbBuffer = nla->outputBuffer.cbBuffer;
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WLog_DBG(TAG, "Sending Authentication Token");
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winpr_HexDump(TAG, WLOG_DEBUG, nla->negoToken.pvBuffer, nla->negoToken.cbBuffer);
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if (!nla_send(nla))
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{
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nla_buffer_free(nla);
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return -1;
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}
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nla_buffer_free(nla);
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nla->state = NLA_STATE_NEGO_TOKEN;
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return 1;
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}
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static int nla_client_recv(rdpNla* nla)
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{
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int status = -1;
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if (nla->state == NLA_STATE_NEGO_TOKEN)
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{
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nla->inputBufferDesc.ulVersion = SECBUFFER_VERSION;
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nla->inputBufferDesc.cBuffers = 1;
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nla->inputBufferDesc.pBuffers = &nla->inputBuffer;
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nla->inputBuffer.BufferType = SECBUFFER_TOKEN;
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nla->inputBuffer.pvBuffer = nla->negoToken.pvBuffer;
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nla->inputBuffer.cbBuffer = nla->negoToken.cbBuffer;
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nla->outputBufferDesc.ulVersion = SECBUFFER_VERSION;
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nla->outputBufferDesc.cBuffers = 1;
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nla->outputBufferDesc.pBuffers = &nla->outputBuffer;
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nla->outputBuffer.BufferType = SECBUFFER_TOKEN;
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nla->outputBuffer.cbBuffer = nla->cbMaxToken;
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nla->outputBuffer.pvBuffer = malloc(nla->outputBuffer.cbBuffer);
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if (!nla->outputBuffer.pvBuffer)
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return -1;
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nla->status = nla->table->InitializeSecurityContext(&nla->credentials,
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&nla->context, nla->ServicePrincipalName, nla->fContextReq, 0,
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SECURITY_NATIVE_DREP, &nla->inputBufferDesc,
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0, &nla->context, &nla->outputBufferDesc, &nla->pfContextAttr, &nla->expiration);
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WLog_VRB(TAG, "InitializeSecurityContext %s [0x%08"PRIX32"]",
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GetSecurityStatusString(nla->status), nla->status);
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free(nla->inputBuffer.pvBuffer);
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nla->inputBuffer.pvBuffer = NULL;
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if ((nla->status == SEC_I_COMPLETE_AND_CONTINUE) || (nla->status == SEC_I_COMPLETE_NEEDED))
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{
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if (nla->table->CompleteAuthToken)
|
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{
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SECURITY_STATUS status;
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status = nla->table->CompleteAuthToken(&nla->context, &nla->outputBufferDesc);
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|
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if (status != SEC_E_OK)
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{
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WLog_WARN(TAG, "CompleteAuthToken status %s [0x%08"PRIX32"]",
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GetSecurityStatusString(status), status);
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return -1;
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}
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}
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|
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if (nla->status == SEC_I_COMPLETE_NEEDED)
|
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nla->status = SEC_E_OK;
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else if (nla->status == SEC_I_COMPLETE_AND_CONTINUE)
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nla->status = SEC_I_CONTINUE_NEEDED;
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}
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if (nla->status == SEC_E_OK)
|
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{
|
|
nla->havePubKeyAuth = TRUE;
|
|
nla->status = nla->table->QueryContextAttributes(&nla->context, SECPKG_ATTR_SIZES,
|
|
&nla->ContextSizes);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "QueryContextAttributes SECPKG_ATTR_SIZES failure %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
|
|
nla->status = nla_encrypt_public_key_echo(nla);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
return -1;
|
|
}
|
|
|
|
nla->negoToken.pvBuffer = nla->outputBuffer.pvBuffer;
|
|
nla->negoToken.cbBuffer = nla->outputBuffer.cbBuffer;
|
|
WLog_DBG(TAG, "Sending Authentication Token");
|
|
winpr_HexDump(TAG, WLOG_DEBUG, nla->negoToken.pvBuffer, nla->negoToken.cbBuffer);
|
|
|
|
if (!nla_send(nla))
|
|
{
|
|
nla_buffer_free(nla);
|
|
return -1;
|
|
}
|
|
|
|
nla_buffer_free(nla);
|
|
|
|
if (nla->status == SEC_E_OK)
|
|
nla->state = NLA_STATE_PUB_KEY_AUTH;
|
|
|
|
status = 1;
|
|
}
|
|
else if (nla->state == NLA_STATE_PUB_KEY_AUTH)
|
|
{
|
|
/* Verify Server Public Key Echo */
|
|
nla->status = nla_decrypt_public_key_echo(nla);
|
|
nla_buffer_free(nla);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "Could not verify public key echo %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
|
|
/* Send encrypted credentials */
|
|
nla->status = nla_encrypt_ts_credentials(nla);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "nla_encrypt_ts_credentials status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
|
|
if (!nla_send(nla))
|
|
{
|
|
nla_buffer_free(nla);
|
|
return -1;
|
|
}
|
|
|
|
nla_buffer_free(nla);
|
|
if (SecIsValidHandle(&nla->credentials))
|
|
{
|
|
nla->table->FreeCredentialsHandle(&nla->credentials);
|
|
SecInvalidateHandle(&nla->credentials);
|
|
}
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "FreeCredentialsHandle status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
}
|
|
|
|
nla->status = nla->table->FreeContextBuffer(nla->pPackageInfo);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "FreeContextBuffer status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
}
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
return -1;
|
|
|
|
nla->state = NLA_STATE_AUTH_INFO;
|
|
status = 1;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
static int nla_client_authenticate(rdpNla* nla)
|
|
{
|
|
wStream* s;
|
|
int status;
|
|
s = Stream_New(NULL, 4096);
|
|
|
|
if (!s)
|
|
{
|
|
WLog_ERR(TAG, "Stream_New failed!");
|
|
return -1;
|
|
}
|
|
|
|
if (nla_client_begin(nla) < 1)
|
|
{
|
|
Stream_Free(s, TRUE);
|
|
return -1;
|
|
}
|
|
|
|
while (nla->state < NLA_STATE_AUTH_INFO)
|
|
{
|
|
Stream_SetPosition(s, 0);
|
|
status = transport_read_pdu(nla->transport, s);
|
|
|
|
if (status < 0)
|
|
{
|
|
WLog_ERR(TAG, "nla_client_authenticate failure");
|
|
Stream_Free(s, TRUE);
|
|
return -1;
|
|
}
|
|
|
|
status = nla_recv_pdu(nla, s);
|
|
|
|
if (status < 0)
|
|
{
|
|
Stream_Free(s, TRUE);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
Stream_Free(s, TRUE);
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Initialize NTLMSSP authentication module (server).
|
|
* @param credssp
|
|
*/
|
|
|
|
static int nla_server_init(rdpNla* nla)
|
|
{
|
|
rdpTls* tls = nla->transport->tls;
|
|
|
|
if (!sspi_SecBufferAlloc(&nla->PublicKey, tls->PublicKeyLength))
|
|
{
|
|
WLog_ERR(TAG, "Failed to allocate SecBuffer for public key");
|
|
return -1;
|
|
}
|
|
|
|
CopyMemory(nla->PublicKey.pvBuffer, tls->PublicKey, tls->PublicKeyLength);
|
|
|
|
if (nla->SspiModule)
|
|
{
|
|
HMODULE hSSPI;
|
|
INIT_SECURITY_INTERFACE pInitSecurityInterface;
|
|
hSSPI = LoadLibrary(nla->SspiModule);
|
|
|
|
if (!hSSPI)
|
|
{
|
|
WLog_ERR(TAG, "Failed to load SSPI module: %s", nla->SspiModule);
|
|
return -1;
|
|
}
|
|
|
|
#ifdef UNICODE
|
|
pInitSecurityInterface = (INIT_SECURITY_INTERFACE) GetProcAddress(hSSPI, "InitSecurityInterfaceW");
|
|
#else
|
|
pInitSecurityInterface = (INIT_SECURITY_INTERFACE) GetProcAddress(hSSPI, "InitSecurityInterfaceA");
|
|
#endif
|
|
nla->table = pInitSecurityInterface();
|
|
}
|
|
else
|
|
{
|
|
nla->table = InitSecurityInterfaceEx(0);
|
|
}
|
|
|
|
nla->status = nla->table->QuerySecurityPackageInfo(NLA_PKG_NAME, &nla->pPackageInfo);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "QuerySecurityPackageInfo status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
|
|
nla->cbMaxToken = nla->pPackageInfo->cbMaxToken;
|
|
nla->status = nla->table->AcquireCredentialsHandle(NULL, NLA_PKG_NAME,
|
|
SECPKG_CRED_INBOUND, NULL, NULL, NULL, NULL, &nla->credentials, &nla->expiration);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "AcquireCredentialsHandle status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
|
|
nla->haveContext = FALSE;
|
|
nla->haveInputBuffer = FALSE;
|
|
nla->havePubKeyAuth = FALSE;
|
|
ZeroMemory(&nla->inputBuffer, sizeof(SecBuffer));
|
|
ZeroMemory(&nla->outputBuffer, sizeof(SecBuffer));
|
|
ZeroMemory(&nla->inputBufferDesc, sizeof(SecBufferDesc));
|
|
ZeroMemory(&nla->outputBufferDesc, sizeof(SecBufferDesc));
|
|
ZeroMemory(&nla->ContextSizes, sizeof(SecPkgContext_Sizes));
|
|
/*
|
|
* from tspkg.dll: 0x00000112
|
|
* ASC_REQ_MUTUAL_AUTH
|
|
* ASC_REQ_CONFIDENTIALITY
|
|
* ASC_REQ_ALLOCATE_MEMORY
|
|
*/
|
|
nla->fContextReq = 0;
|
|
nla->fContextReq |= ASC_REQ_MUTUAL_AUTH;
|
|
nla->fContextReq |= ASC_REQ_CONFIDENTIALITY;
|
|
nla->fContextReq |= ASC_REQ_CONNECTION;
|
|
nla->fContextReq |= ASC_REQ_USE_SESSION_KEY;
|
|
nla->fContextReq |= ASC_REQ_REPLAY_DETECT;
|
|
nla->fContextReq |= ASC_REQ_SEQUENCE_DETECT;
|
|
nla->fContextReq |= ASC_REQ_EXTENDED_ERROR;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Authenticate with client using CredSSP (server).
|
|
* @param credssp
|
|
* @return 1 if authentication is successful
|
|
*/
|
|
|
|
static int nla_server_authenticate(rdpNla* nla)
|
|
{
|
|
if (nla_server_init(nla) < 1)
|
|
return -1;
|
|
|
|
while (TRUE)
|
|
{
|
|
/* receive authentication token */
|
|
nla->inputBufferDesc.ulVersion = SECBUFFER_VERSION;
|
|
nla->inputBufferDesc.cBuffers = 1;
|
|
nla->inputBufferDesc.pBuffers = &nla->inputBuffer;
|
|
nla->inputBuffer.BufferType = SECBUFFER_TOKEN;
|
|
|
|
if (nla_recv(nla) < 0)
|
|
return -1;
|
|
|
|
WLog_DBG(TAG, "Receiving Authentication Token");
|
|
nla_buffer_print(nla);
|
|
nla->inputBuffer.pvBuffer = nla->negoToken.pvBuffer;
|
|
nla->inputBuffer.cbBuffer = nla->negoToken.cbBuffer;
|
|
|
|
if (nla->negoToken.cbBuffer < 1)
|
|
{
|
|
WLog_ERR(TAG, "CredSSP: invalid negoToken!");
|
|
return -1;
|
|
}
|
|
|
|
nla->outputBufferDesc.ulVersion = SECBUFFER_VERSION;
|
|
nla->outputBufferDesc.cBuffers = 1;
|
|
nla->outputBufferDesc.pBuffers = &nla->outputBuffer;
|
|
nla->outputBuffer.BufferType = SECBUFFER_TOKEN;
|
|
nla->outputBuffer.cbBuffer = nla->cbMaxToken;
|
|
nla->outputBuffer.pvBuffer = malloc(nla->outputBuffer.cbBuffer);
|
|
|
|
if (!nla->outputBuffer.pvBuffer)
|
|
return -1;
|
|
|
|
nla->status = nla->table->AcceptSecurityContext(&nla->credentials,
|
|
nla->haveContext ? &nla->context : NULL,
|
|
&nla->inputBufferDesc, nla->fContextReq, SECURITY_NATIVE_DREP, &nla->context,
|
|
&nla->outputBufferDesc, &nla->pfContextAttr, &nla->expiration);
|
|
WLog_VRB(TAG, "AcceptSecurityContext status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
nla->negoToken.pvBuffer = nla->outputBuffer.pvBuffer;
|
|
nla->negoToken.cbBuffer = nla->outputBuffer.cbBuffer;
|
|
|
|
if ((nla->status == SEC_I_COMPLETE_AND_CONTINUE) || (nla->status == SEC_I_COMPLETE_NEEDED))
|
|
{
|
|
freerdp_peer* peer = nla->instance->context->peer;
|
|
|
|
if (peer->ComputeNtlmHash)
|
|
{
|
|
SECURITY_STATUS status;
|
|
status = nla->table->SetContextAttributes(&nla->context, SECPKG_ATTR_AUTH_NTLM_HASH_CB,
|
|
peer->ComputeNtlmHash, 0);
|
|
|
|
if (status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "SetContextAttributesA(hash cb) status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(status), status);
|
|
}
|
|
|
|
status = nla->table->SetContextAttributes(&nla->context, SECPKG_ATTR_AUTH_NTLM_HASH_CB_DATA, peer,
|
|
0);
|
|
if (status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "SetContextAttributesA(hash cb data) status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(status), status);
|
|
}
|
|
}
|
|
else if (nla->SamFile)
|
|
{
|
|
nla->table->SetContextAttributes(&nla->context, SECPKG_ATTR_AUTH_NTLM_SAM_FILE, nla->SamFile,
|
|
strlen(nla->SamFile) + 1);
|
|
}
|
|
|
|
if (nla->table->CompleteAuthToken)
|
|
{
|
|
SECURITY_STATUS status;
|
|
status = nla->table->CompleteAuthToken(&nla->context, &nla->outputBufferDesc);
|
|
|
|
if (status != SEC_E_OK)
|
|
{
|
|
WLog_WARN(TAG, "CompleteAuthToken status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(status), status);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (nla->status == SEC_I_COMPLETE_NEEDED)
|
|
nla->status = SEC_E_OK;
|
|
else if (nla->status == SEC_I_COMPLETE_AND_CONTINUE)
|
|
nla->status = SEC_I_CONTINUE_NEEDED;
|
|
}
|
|
|
|
if (nla->status == SEC_E_OK)
|
|
{
|
|
if (nla->outputBuffer.cbBuffer != 0)
|
|
{
|
|
if (!nla_send(nla))
|
|
{
|
|
nla_buffer_free(nla);
|
|
return -1;
|
|
}
|
|
|
|
if (nla_recv(nla) < 0)
|
|
return -1;
|
|
|
|
WLog_DBG(TAG, "Receiving pubkey Token");
|
|
nla_buffer_print(nla);
|
|
}
|
|
|
|
nla->havePubKeyAuth = TRUE;
|
|
nla->status = nla->table->QueryContextAttributes(&nla->context, SECPKG_ATTR_SIZES,
|
|
&nla->ContextSizes);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "QueryContextAttributes SECPKG_ATTR_SIZES failure %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
|
|
nla->status = nla_decrypt_public_key_echo(nla);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "Error: could not verify client's public key echo %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
|
|
sspi_SecBufferFree(&nla->negoToken);
|
|
nla->negoToken.pvBuffer = NULL;
|
|
nla->negoToken.cbBuffer = 0;
|
|
nla->status = nla_encrypt_public_key_echo(nla);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
return -1;
|
|
}
|
|
|
|
if ((nla->status != SEC_E_OK) && (nla->status != SEC_I_CONTINUE_NEEDED))
|
|
{
|
|
/* Special handling of these specific error codes as NTSTATUS_FROM_WIN32
|
|
unfortunately does not map directly to the corresponding NTSTATUS values
|
|
*/
|
|
switch (GetLastError())
|
|
{
|
|
case ERROR_PASSWORD_MUST_CHANGE:
|
|
nla->errorCode = STATUS_PASSWORD_MUST_CHANGE;
|
|
break;
|
|
|
|
case ERROR_PASSWORD_EXPIRED:
|
|
nla->errorCode = STATUS_PASSWORD_EXPIRED;
|
|
break;
|
|
|
|
case ERROR_ACCOUNT_DISABLED:
|
|
nla->errorCode = STATUS_ACCOUNT_DISABLED;
|
|
break;
|
|
|
|
default:
|
|
nla->errorCode = NTSTATUS_FROM_WIN32(GetLastError());
|
|
break;
|
|
}
|
|
|
|
WLog_ERR(TAG, "AcceptSecurityContext status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
nla_send(nla);
|
|
return -1; /* Access Denied */
|
|
}
|
|
|
|
/* send authentication token */
|
|
WLog_DBG(TAG, "Sending Authentication Token");
|
|
nla_buffer_print(nla);
|
|
|
|
if (!nla_send(nla))
|
|
{
|
|
nla_buffer_free(nla);
|
|
return -1;
|
|
}
|
|
|
|
nla_buffer_free(nla);
|
|
|
|
if (nla->status != SEC_I_CONTINUE_NEEDED)
|
|
break;
|
|
|
|
nla->haveContext = TRUE;
|
|
}
|
|
|
|
/* Receive encrypted credentials */
|
|
|
|
if (nla_recv(nla) < 0)
|
|
return -1;
|
|
|
|
nla->status = nla_decrypt_ts_credentials(nla);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "Could not decrypt TSCredentials status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
|
|
nla->status = nla->table->ImpersonateSecurityContext(&nla->context);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "ImpersonateSecurityContext status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
nla->status = nla->table->RevertSecurityContext(&nla->context);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "RevertSecurityContext status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
nla->status = nla->table->FreeContextBuffer(nla->pPackageInfo);
|
|
|
|
if (nla->status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "DeleteSecurityContext status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(nla->status), nla->status);
|
|
return -1;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Authenticate using CredSSP.
|
|
* @param credssp
|
|
* @return 1 if authentication is successful
|
|
*/
|
|
|
|
int nla_authenticate(rdpNla* nla)
|
|
{
|
|
if (nla->server)
|
|
return nla_server_authenticate(nla);
|
|
else
|
|
return nla_client_authenticate(nla);
|
|
}
|
|
|
|
static void ap_integer_increment_le(BYTE* number, int size)
|
|
{
|
|
int index;
|
|
|
|
for (index = 0; index < size; index++)
|
|
{
|
|
if (number[index] < 0xFF)
|
|
{
|
|
number[index]++;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
number[index] = 0;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void ap_integer_decrement_le(BYTE* number, int size)
|
|
{
|
|
int index;
|
|
|
|
for (index = 0; index < size; index++)
|
|
{
|
|
if (number[index] > 0)
|
|
{
|
|
number[index]--;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
number[index] = 0xFF;
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
SECURITY_STATUS nla_encrypt_public_key_echo(rdpNla* nla)
|
|
{
|
|
SecBuffer Buffers[2];
|
|
SecBufferDesc Message;
|
|
SECURITY_STATUS status;
|
|
int public_key_length;
|
|
public_key_length = nla->PublicKey.cbBuffer;
|
|
|
|
if (!sspi_SecBufferAlloc(&nla->pubKeyAuth, public_key_length + nla->ContextSizes.cbSecurityTrailer))
|
|
return SEC_E_INSUFFICIENT_MEMORY;
|
|
|
|
if (strcmp(nla->packageName, KERBEROS_SSP_NAME) == 0)
|
|
{
|
|
Buffers[0].BufferType = SECBUFFER_DATA; /* TLS Public Key */
|
|
Buffers[0].cbBuffer = public_key_length;
|
|
Buffers[0].pvBuffer = nla->pubKeyAuth.pvBuffer;
|
|
CopyMemory(Buffers[0].pvBuffer, nla->PublicKey.pvBuffer, Buffers[0].cbBuffer);
|
|
}
|
|
else if ((strcmp(nla->packageName, NEGO_SSP_NAME) != 0) ||
|
|
(strcmp(nla->packageName, NTLM_SSP_NAME) != 0))
|
|
{
|
|
Buffers[0].BufferType = SECBUFFER_TOKEN; /* Signature */
|
|
Buffers[0].cbBuffer = nla->ContextSizes.cbSecurityTrailer;
|
|
Buffers[0].pvBuffer = nla->pubKeyAuth.pvBuffer;
|
|
Buffers[1].BufferType = SECBUFFER_DATA; /* TLS Public Key */
|
|
Buffers[1].cbBuffer = public_key_length;
|
|
Buffers[1].pvBuffer = ((BYTE*) nla->pubKeyAuth.pvBuffer) + nla->ContextSizes.cbSecurityTrailer;
|
|
CopyMemory(Buffers[1].pvBuffer, nla->PublicKey.pvBuffer, Buffers[1].cbBuffer);
|
|
}
|
|
|
|
if ((strcmp(nla->packageName, KERBEROS_SSP_NAME) != 0) && nla->server)
|
|
{
|
|
/* server echos the public key +1 */
|
|
ap_integer_increment_le((BYTE*) Buffers[1].pvBuffer, Buffers[1].cbBuffer);
|
|
}
|
|
|
|
Message.cBuffers = 2;
|
|
Message.ulVersion = SECBUFFER_VERSION;
|
|
Message.pBuffers = (PSecBuffer) &Buffers;
|
|
status = nla->table->EncryptMessage(&nla->context, 0, &Message, nla->sendSeqNum++);
|
|
|
|
if (status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "EncryptMessage status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(status), status);
|
|
return status;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
SECURITY_STATUS nla_decrypt_public_key_echo(rdpNla* nla)
|
|
{
|
|
int length;
|
|
BYTE* buffer;
|
|
ULONG pfQOP = 0;
|
|
BYTE* public_key1;
|
|
BYTE* public_key2;
|
|
int public_key_length = 0;
|
|
int signature_length;
|
|
SecBuffer Buffers[2] = { 0 };
|
|
SecBufferDesc Message;
|
|
SECURITY_STATUS status;
|
|
signature_length = nla->pubKeyAuth.cbBuffer - nla->PublicKey.cbBuffer;
|
|
|
|
if (signature_length < 0 || signature_length > nla->ContextSizes.cbSecurityTrailer)
|
|
{
|
|
WLog_ERR(TAG, "unexpected pubKeyAuth buffer size: %"PRIu32"", nla->pubKeyAuth.cbBuffer);
|
|
return SEC_E_INVALID_TOKEN;
|
|
}
|
|
|
|
if ((nla->PublicKey.cbBuffer + nla->ContextSizes.cbSecurityTrailer) != nla->pubKeyAuth.cbBuffer)
|
|
{
|
|
WLog_ERR(TAG, "unexpected pubKeyAuth buffer size: %"PRIu32"", (int) nla->pubKeyAuth.cbBuffer);
|
|
return SEC_E_INVALID_TOKEN;
|
|
}
|
|
|
|
length = nla->pubKeyAuth.cbBuffer;
|
|
buffer = (BYTE*) malloc(length);
|
|
|
|
if (!buffer)
|
|
return SEC_E_INSUFFICIENT_MEMORY;
|
|
|
|
if (strcmp(nla->packageName, KERBEROS_SSP_NAME) == 0)
|
|
{
|
|
CopyMemory(buffer, nla->pubKeyAuth.pvBuffer, length);
|
|
Buffers[0].BufferType = SECBUFFER_DATA; /* Wrapped and encrypted TLS Public Key */
|
|
Buffers[0].cbBuffer = length;
|
|
Buffers[0].pvBuffer = buffer;
|
|
Message.cBuffers = 1;
|
|
Message.ulVersion = SECBUFFER_VERSION;
|
|
Message.pBuffers = (PSecBuffer) &Buffers;
|
|
}
|
|
else if ((strcmp(nla->packageName, NEGO_SSP_NAME) == 0) ||
|
|
(strcmp(nla->packageName, NTLM_SSP_NAME) == 0))
|
|
{
|
|
CopyMemory(buffer, nla->pubKeyAuth.pvBuffer, length);
|
|
public_key_length = nla->PublicKey.cbBuffer;
|
|
Buffers[0].BufferType = SECBUFFER_TOKEN; /* Signature */
|
|
Buffers[0].cbBuffer = signature_length;
|
|
Buffers[0].pvBuffer = buffer;
|
|
Buffers[1].BufferType = SECBUFFER_DATA; /* Encrypted TLS Public Key */
|
|
Buffers[1].cbBuffer = length - signature_length;
|
|
Buffers[1].pvBuffer = buffer + signature_length;
|
|
Message.cBuffers = 2;
|
|
Message.ulVersion = SECBUFFER_VERSION;
|
|
Message.pBuffers = (PSecBuffer) &Buffers;
|
|
}
|
|
status = nla->table->DecryptMessage(&nla->context, &Message, nla->recvSeqNum++, &pfQOP);
|
|
|
|
if (status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "DecryptMessage failure %s [%08"PRIX32"]",
|
|
GetSecurityStatusString(status), status);
|
|
free(buffer);
|
|
return status;
|
|
}
|
|
|
|
if (strcmp(nla->packageName, KERBEROS_SSP_NAME) == 0)
|
|
{
|
|
public_key1 = public_key2 = (BYTE*) nla->pubKeyAuth.pvBuffer ;
|
|
public_key_length = length;
|
|
}
|
|
else if ((strcmp(nla->packageName, NEGO_SSP_NAME) == 0) ||
|
|
(strcmp(nla->packageName, NTLM_SSP_NAME) == 0))
|
|
{
|
|
public_key1 = (BYTE*) nla->PublicKey.pvBuffer;
|
|
public_key2 = (BYTE*) Buffers[1].pvBuffer;
|
|
}
|
|
|
|
if (!nla->server)
|
|
{
|
|
/* server echos the public key +1 */
|
|
ap_integer_decrement_le(public_key2, public_key_length);
|
|
}
|
|
|
|
if (memcmp(public_key1, public_key2, public_key_length) != 0)
|
|
{
|
|
WLog_ERR(TAG, "Could not verify server's public key echo");
|
|
WLog_ERR(TAG, "Expected (length = %d):", public_key_length);
|
|
winpr_HexDump(TAG, WLOG_ERROR, public_key1, public_key_length);
|
|
WLog_ERR(TAG, "Actual (length = %d):", public_key_length);
|
|
winpr_HexDump(TAG, WLOG_ERROR, public_key2, public_key_length);
|
|
free(buffer);
|
|
return SEC_E_MESSAGE_ALTERED; /* DO NOT SEND CREDENTIALS! */
|
|
}
|
|
|
|
free(buffer);
|
|
return SEC_E_OK;
|
|
}
|
|
|
|
int nla_sizeof_ts_password_creds(rdpNla* nla)
|
|
{
|
|
int length = 0;
|
|
|
|
if (nla->identity)
|
|
{
|
|
length += ber_sizeof_sequence_octet_string(nla->identity->DomainLength * 2);
|
|
length += ber_sizeof_sequence_octet_string(nla->identity->UserLength * 2);
|
|
length += ber_sizeof_sequence_octet_string(nla->identity->PasswordLength * 2);
|
|
}
|
|
|
|
return length;
|
|
}
|
|
|
|
static int nla_sizeof_ts_credentials(rdpNla* nla)
|
|
{
|
|
int size = 0;
|
|
size += ber_sizeof_integer(1);
|
|
size += ber_sizeof_contextual_tag(ber_sizeof_integer(1));
|
|
size += ber_sizeof_sequence_octet_string(ber_sizeof_sequence(nla_sizeof_ts_password_creds(nla)));
|
|
return size;
|
|
}
|
|
|
|
BOOL nla_read_ts_password_creds(rdpNla* nla, wStream* s)
|
|
{
|
|
int length;
|
|
|
|
if (!nla->identity)
|
|
{
|
|
WLog_ERR(TAG, "nla->identity is NULL!");
|
|
return FALSE;
|
|
}
|
|
|
|
/* TSPasswordCreds (SEQUENCE)
|
|
* Initialise to default values. */
|
|
nla->identity->Flags = SEC_WINNT_AUTH_IDENTITY_UNICODE;
|
|
nla->identity->UserLength = (UINT32) 0;
|
|
nla->identity->User = NULL;
|
|
nla->identity->DomainLength = (UINT32) 0;
|
|
nla->identity->Domain = NULL;
|
|
nla->identity->Password = NULL;
|
|
nla->identity->PasswordLength = (UINT32) 0;
|
|
|
|
if (!ber_read_sequence_tag(s, &length))
|
|
return FALSE;
|
|
|
|
/* The sequence is empty, return early,
|
|
* TSPasswordCreds (SEQUENCE) is optional. */
|
|
if (length == 0)
|
|
return TRUE;
|
|
|
|
/* [0] domainName (OCTET STRING) */
|
|
if (!ber_read_contextual_tag(s, 0, &length, TRUE) ||
|
|
!ber_read_octet_string_tag(s, &length))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
nla->identity->DomainLength = (UINT32) length;
|
|
|
|
if (nla->identity->DomainLength > 0)
|
|
{
|
|
nla->identity->Domain = (UINT16*) malloc(length);
|
|
|
|
if (!nla->identity->Domain)
|
|
return FALSE;
|
|
|
|
CopyMemory(nla->identity->Domain, Stream_Pointer(s), nla->identity->DomainLength);
|
|
Stream_Seek(s, nla->identity->DomainLength);
|
|
nla->identity->DomainLength /= 2;
|
|
}
|
|
|
|
/* [1] userName (OCTET STRING) */
|
|
if (!ber_read_contextual_tag(s, 1, &length, TRUE) ||
|
|
!ber_read_octet_string_tag(s, &length))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
nla->identity->UserLength = (UINT32) length;
|
|
|
|
if (nla->identity->UserLength > 0)
|
|
{
|
|
nla->identity->User = (UINT16*) malloc(length);
|
|
|
|
if (!nla->identity->User)
|
|
return FALSE;
|
|
|
|
CopyMemory(nla->identity->User, Stream_Pointer(s), nla->identity->UserLength);
|
|
Stream_Seek(s, nla->identity->UserLength);
|
|
nla->identity->UserLength /= 2;
|
|
}
|
|
|
|
/* [2] password (OCTET STRING) */
|
|
if (!ber_read_contextual_tag(s, 2, &length, TRUE) ||
|
|
!ber_read_octet_string_tag(s, &length))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
nla->identity->PasswordLength = (UINT32) length;
|
|
|
|
if (nla->identity->PasswordLength > 0)
|
|
{
|
|
nla->identity->Password = (UINT16*) malloc(length);
|
|
|
|
if (!nla->identity->Password)
|
|
return FALSE;
|
|
|
|
CopyMemory(nla->identity->Password, Stream_Pointer(s), nla->identity->PasswordLength);
|
|
Stream_Seek(s, nla->identity->PasswordLength);
|
|
nla->identity->PasswordLength /= 2;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int nla_write_ts_password_creds(rdpNla* nla, wStream* s)
|
|
{
|
|
int size = 0;
|
|
int innerSize = nla_sizeof_ts_password_creds(nla);
|
|
/* TSPasswordCreds (SEQUENCE) */
|
|
size += ber_write_sequence_tag(s, innerSize);
|
|
|
|
if (nla->identity)
|
|
{
|
|
/* [0] domainName (OCTET STRING) */
|
|
size += ber_write_sequence_octet_string(
|
|
s, 0, (BYTE*) nla->identity->Domain,
|
|
nla->identity->DomainLength * 2);
|
|
/* [1] userName (OCTET STRING) */
|
|
size += ber_write_sequence_octet_string(
|
|
s, 1, (BYTE*) nla->identity->User,
|
|
nla->identity->UserLength * 2);
|
|
/* [2] password (OCTET STRING) */
|
|
size += ber_write_sequence_octet_string(
|
|
s, 2, (BYTE*) nla->identity->Password,
|
|
nla->identity->PasswordLength * 2);
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
static BOOL nla_read_ts_credentials(rdpNla* nla, PSecBuffer ts_credentials)
|
|
{
|
|
wStream* s;
|
|
int length;
|
|
int ts_password_creds_length = 0;
|
|
BOOL ret;
|
|
s = Stream_New(ts_credentials->pvBuffer, ts_credentials->cbBuffer);
|
|
|
|
if (!s)
|
|
{
|
|
WLog_ERR(TAG, "Stream_New failed!");
|
|
return FALSE;
|
|
}
|
|
|
|
/* TSCredentials (SEQUENCE) */
|
|
ret = ber_read_sequence_tag(s, &length) &&
|
|
/* [0] credType (INTEGER) */
|
|
ber_read_contextual_tag(s, 0, &length, TRUE) &&
|
|
ber_read_integer(s, NULL) &&
|
|
/* [1] credentials (OCTET STRING) */
|
|
ber_read_contextual_tag(s, 1, &length, TRUE) &&
|
|
ber_read_octet_string_tag(s, &ts_password_creds_length) &&
|
|
nla_read_ts_password_creds(nla, s);
|
|
Stream_Free(s, FALSE);
|
|
return ret;
|
|
}
|
|
|
|
static int nla_write_ts_credentials(rdpNla* nla, wStream* s)
|
|
{
|
|
int size = 0;
|
|
int passwordSize;
|
|
int innerSize = nla_sizeof_ts_credentials(nla);
|
|
/* TSCredentials (SEQUENCE) */
|
|
size += ber_write_sequence_tag(s, innerSize);
|
|
/* [0] credType (INTEGER) */
|
|
size += ber_write_contextual_tag(s, 0, ber_sizeof_integer(1), TRUE);
|
|
size += ber_write_integer(s, 1);
|
|
/* [1] credentials (OCTET STRING) */
|
|
passwordSize = ber_sizeof_sequence(nla_sizeof_ts_password_creds(nla));
|
|
size += ber_write_contextual_tag(s, 1, ber_sizeof_octet_string(passwordSize), TRUE);
|
|
size += ber_write_octet_string_tag(s, passwordSize);
|
|
size += nla_write_ts_password_creds(nla, s);
|
|
return size;
|
|
}
|
|
|
|
/**
|
|
* Encode TSCredentials structure.
|
|
* @param credssp
|
|
*/
|
|
|
|
static BOOL nla_encode_ts_credentials(rdpNla* nla)
|
|
{
|
|
wStream* s;
|
|
int length;
|
|
int DomainLength = 0;
|
|
int UserLength = 0;
|
|
int PasswordLength = 0;
|
|
|
|
if (nla->identity)
|
|
{
|
|
/* TSPasswordCreds */
|
|
DomainLength = nla->identity->DomainLength;
|
|
UserLength = nla->identity->UserLength;
|
|
PasswordLength = nla->identity->PasswordLength;
|
|
}
|
|
|
|
if (nla->settings->DisableCredentialsDelegation && nla->identity)
|
|
{
|
|
/* TSPasswordCreds */
|
|
nla->identity->DomainLength = 0;
|
|
nla->identity->UserLength = 0;
|
|
nla->identity->PasswordLength = 0;
|
|
}
|
|
|
|
length = ber_sizeof_sequence(nla_sizeof_ts_credentials(nla));
|
|
|
|
if (!sspi_SecBufferAlloc(&nla->tsCredentials, length))
|
|
{
|
|
WLog_ERR(TAG, "sspi_SecBufferAlloc failed!");
|
|
return FALSE;
|
|
}
|
|
|
|
s = Stream_New((BYTE*) nla->tsCredentials.pvBuffer, length);
|
|
|
|
if (!s)
|
|
{
|
|
sspi_SecBufferFree(&nla->tsCredentials);
|
|
WLog_ERR(TAG, "Stream_New failed!");
|
|
return FALSE;
|
|
}
|
|
|
|
nla_write_ts_credentials(nla, s);
|
|
|
|
if (nla->settings->DisableCredentialsDelegation)
|
|
{
|
|
/* TSPasswordCreds */
|
|
nla->identity->DomainLength = DomainLength;
|
|
nla->identity->UserLength = UserLength;
|
|
nla->identity->PasswordLength = PasswordLength;
|
|
}
|
|
|
|
Stream_Free(s, FALSE);
|
|
return TRUE;
|
|
}
|
|
|
|
static SECURITY_STATUS nla_encrypt_ts_credentials(rdpNla* nla)
|
|
{
|
|
SecBuffer Buffers[2];
|
|
SecBufferDesc Message;
|
|
SECURITY_STATUS status;
|
|
|
|
if (!nla_encode_ts_credentials(nla))
|
|
return SEC_E_INSUFFICIENT_MEMORY;
|
|
|
|
if (!sspi_SecBufferAlloc(&nla->authInfo,
|
|
nla->tsCredentials.cbBuffer + nla->ContextSizes.cbSecurityTrailer))
|
|
return SEC_E_INSUFFICIENT_MEMORY;
|
|
|
|
if (strcmp(nla->packageName, KERBEROS_SSP_NAME) == 0)
|
|
{
|
|
Buffers[0].BufferType = SECBUFFER_DATA; /* TSCredentials */
|
|
Buffers[0].cbBuffer = nla->tsCredentials.cbBuffer;
|
|
Buffers[0].pvBuffer = nla->authInfo.pvBuffer;
|
|
CopyMemory(Buffers[0].pvBuffer, nla->tsCredentials.pvBuffer, Buffers[0].cbBuffer);
|
|
Message.cBuffers = 1;
|
|
Message.ulVersion = SECBUFFER_VERSION;
|
|
Message.pBuffers = (PSecBuffer) &Buffers;
|
|
}
|
|
else if ((strcmp(nla->packageName, NEGO_SSP_NAME) == 0) ||
|
|
(strcmp(nla->packageName, NTLM_SSP_NAME) == 0))
|
|
{
|
|
Buffers[0].BufferType = SECBUFFER_TOKEN; /* Signature */
|
|
Buffers[0].cbBuffer = nla->ContextSizes.cbSecurityTrailer;
|
|
Buffers[0].pvBuffer = nla->authInfo.pvBuffer;
|
|
MoveMemory(Buffers[0].pvBuffer, nla->authInfo.pvBuffer, Buffers[0].cbBuffer);
|
|
Buffers[1].BufferType = SECBUFFER_DATA; /* TSCredentials */
|
|
Buffers[1].cbBuffer = nla->tsCredentials.cbBuffer;
|
|
Buffers[1].pvBuffer = &((BYTE*) nla->authInfo.pvBuffer)[Buffers[0].cbBuffer];
|
|
CopyMemory(Buffers[1].pvBuffer, nla->tsCredentials.pvBuffer, Buffers[1].cbBuffer);
|
|
Message.cBuffers = 2;
|
|
Message.ulVersion = SECBUFFER_VERSION;
|
|
Message.pBuffers = (PSecBuffer) &Buffers;
|
|
}
|
|
status = nla->table->EncryptMessage(&nla->context, 0, &Message, nla->sendSeqNum++);
|
|
|
|
if (status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "EncryptMessage failure %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(status), status);
|
|
return status;
|
|
}
|
|
|
|
return SEC_E_OK;
|
|
}
|
|
|
|
static SECURITY_STATUS nla_decrypt_ts_credentials(rdpNla* nla)
|
|
{
|
|
int length;
|
|
BYTE* buffer;
|
|
ULONG pfQOP;
|
|
SecBuffer Buffers[2];
|
|
SecBufferDesc Message;
|
|
SECURITY_STATUS status;
|
|
|
|
if (nla->authInfo.cbBuffer < 1)
|
|
{
|
|
WLog_ERR(TAG, "nla_decrypt_ts_credentials missing authInfo buffer");
|
|
return SEC_E_INVALID_TOKEN;
|
|
}
|
|
|
|
length = nla->authInfo.cbBuffer;
|
|
buffer = (BYTE*) malloc(length);
|
|
|
|
if (!buffer)
|
|
return SEC_E_INSUFFICIENT_MEMORY;
|
|
|
|
if (strcmp(nla->packageName, KERBEROS_SSP_NAME) == 0)
|
|
{
|
|
CopyMemory(buffer, nla->authInfo.pvBuffer, length);
|
|
Buffers[0].BufferType = SECBUFFER_DATA; /* Wrapped and encrypted TSCredentials */
|
|
Buffers[0].cbBuffer = length;
|
|
Buffers[0].pvBuffer = buffer;
|
|
Message.cBuffers = 1;
|
|
Message.ulVersion = SECBUFFER_VERSION;
|
|
Message.pBuffers = (PSecBuffer) &Buffers;
|
|
}
|
|
else if ((strcmp(nla->packageName, NEGO_SSP_NAME) == 0) ||
|
|
(strcmp(nla->packageName, NTLM_SSP_NAME) == 0))
|
|
{
|
|
CopyMemory(buffer, nla->authInfo.pvBuffer, length);
|
|
Buffers[0].BufferType = SECBUFFER_TOKEN; /* Signature */
|
|
Buffers[0].cbBuffer = nla->ContextSizes.cbSecurityTrailer;
|
|
Buffers[0].pvBuffer = buffer;
|
|
Buffers[1].BufferType = SECBUFFER_DATA; /* TSCredentials */
|
|
Buffers[1].cbBuffer = length - nla->ContextSizes.cbSecurityTrailer;
|
|
Buffers[1].pvBuffer = &buffer[ Buffers[0].cbBuffer ];
|
|
Message.cBuffers = 2;
|
|
Message.ulVersion = SECBUFFER_VERSION;
|
|
Message.pBuffers = (PSecBuffer) &Buffers;
|
|
}
|
|
status = nla->table->DecryptMessage(&nla->context, &Message, nla->recvSeqNum++, &pfQOP);
|
|
|
|
if (status != SEC_E_OK)
|
|
{
|
|
WLog_ERR(TAG, "DecryptMessage failure %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(status), status);
|
|
free(buffer);
|
|
return status;
|
|
}
|
|
|
|
if (!nla_read_ts_credentials(nla, &Buffers[1]))
|
|
{
|
|
free(buffer);
|
|
return SEC_E_INSUFFICIENT_MEMORY;
|
|
}
|
|
|
|
free(buffer);
|
|
return SEC_E_OK;
|
|
}
|
|
|
|
static int nla_sizeof_nego_token(int length)
|
|
{
|
|
length = ber_sizeof_octet_string(length);
|
|
length += ber_sizeof_contextual_tag(length);
|
|
return length;
|
|
}
|
|
|
|
static int nla_sizeof_nego_tokens(int length)
|
|
{
|
|
length = nla_sizeof_nego_token(length);
|
|
length += ber_sizeof_sequence_tag(length);
|
|
length += ber_sizeof_sequence_tag(length);
|
|
length += ber_sizeof_contextual_tag(length);
|
|
return length;
|
|
}
|
|
|
|
static int nla_sizeof_pub_key_auth(int length)
|
|
{
|
|
length = ber_sizeof_octet_string(length);
|
|
length += ber_sizeof_contextual_tag(length);
|
|
return length;
|
|
}
|
|
|
|
static int nla_sizeof_auth_info(int length)
|
|
{
|
|
length = ber_sizeof_octet_string(length);
|
|
length += ber_sizeof_contextual_tag(length);
|
|
return length;
|
|
}
|
|
|
|
static int nla_sizeof_ts_request(int length)
|
|
{
|
|
length += ber_sizeof_integer(2);
|
|
length += ber_sizeof_contextual_tag(3);
|
|
return length;
|
|
}
|
|
|
|
/**
|
|
* Send CredSSP message.
|
|
* @param credssp
|
|
*/
|
|
|
|
BOOL nla_send(rdpNla* nla)
|
|
{
|
|
wStream* s;
|
|
int length;
|
|
int ts_request_length;
|
|
int nego_tokens_length = 0;
|
|
int pub_key_auth_length = 0;
|
|
int auth_info_length = 0;
|
|
int error_code_context_length = 0;
|
|
int error_code_length = 0;
|
|
|
|
if (nla->version < 3 || nla->errorCode == 0)
|
|
{
|
|
nego_tokens_length = (nla->negoToken.cbBuffer > 0) ? nla_sizeof_nego_tokens(
|
|
nla->negoToken.cbBuffer) : 0;
|
|
pub_key_auth_length = (nla->pubKeyAuth.cbBuffer > 0) ? nla_sizeof_pub_key_auth(
|
|
nla->pubKeyAuth.cbBuffer) : 0;
|
|
auth_info_length = (nla->authInfo.cbBuffer > 0) ? nla_sizeof_auth_info(nla->authInfo.cbBuffer) : 0;
|
|
}
|
|
else
|
|
{
|
|
error_code_length = ber_sizeof_integer(nla->errorCode);
|
|
error_code_context_length = ber_sizeof_contextual_tag(error_code_length);
|
|
}
|
|
|
|
length = nego_tokens_length + pub_key_auth_length + auth_info_length + error_code_context_length +
|
|
error_code_length;
|
|
ts_request_length = nla_sizeof_ts_request(length);
|
|
s = Stream_New(NULL, ber_sizeof_sequence(ts_request_length));
|
|
|
|
if (!s)
|
|
{
|
|
WLog_ERR(TAG, "Stream_New failed!");
|
|
return FALSE;
|
|
}
|
|
|
|
/* TSRequest */
|
|
ber_write_sequence_tag(s, ts_request_length); /* SEQUENCE */
|
|
/* [0] version */
|
|
ber_write_contextual_tag(s, 0, 3, TRUE);
|
|
ber_write_integer(s, nla->version); /* INTEGER */
|
|
|
|
/* [1] negoTokens (NegoData) */
|
|
if (nego_tokens_length > 0)
|
|
{
|
|
int length = ber_write_contextual_tag(s, 1,
|
|
ber_sizeof_sequence(ber_sizeof_sequence(ber_sizeof_sequence_octet_string(nla->negoToken.cbBuffer))),
|
|
TRUE); /* NegoData */
|
|
length += ber_write_sequence_tag(s,
|
|
ber_sizeof_sequence(ber_sizeof_sequence_octet_string(
|
|
nla->negoToken.cbBuffer))); /* SEQUENCE OF NegoDataItem */
|
|
length += ber_write_sequence_tag(s,
|
|
ber_sizeof_sequence_octet_string(nla->negoToken.cbBuffer)); /* NegoDataItem */
|
|
length += ber_write_sequence_octet_string(s, 0, (BYTE*) nla->negoToken.pvBuffer,
|
|
nla->negoToken.cbBuffer); /* OCTET STRING */
|
|
|
|
if (length != nego_tokens_length)
|
|
return FALSE;
|
|
}
|
|
|
|
/* [2] authInfo (OCTET STRING) */
|
|
if (auth_info_length > 0)
|
|
{
|
|
if (ber_write_sequence_octet_string(s, 2, nla->authInfo.pvBuffer,
|
|
nla->authInfo.cbBuffer) != auth_info_length)
|
|
return FALSE;
|
|
}
|
|
|
|
/* [3] pubKeyAuth (OCTET STRING) */
|
|
if (pub_key_auth_length > 0)
|
|
{
|
|
if (ber_write_sequence_octet_string(s, 3, nla->pubKeyAuth.pvBuffer,
|
|
nla->pubKeyAuth.cbBuffer) != pub_key_auth_length)
|
|
return FALSE;
|
|
}
|
|
|
|
/* [4] errorCode (INTEGER) */
|
|
if (error_code_length > 0)
|
|
{
|
|
ber_write_contextual_tag(s, 4, error_code_length, TRUE);
|
|
ber_write_integer(s, nla->errorCode);
|
|
}
|
|
|
|
Stream_SealLength(s);
|
|
transport_write(nla->transport, s);
|
|
Stream_Free(s, TRUE);
|
|
return TRUE;
|
|
}
|
|
|
|
static int nla_decode_ts_request(rdpNla* nla, wStream* s)
|
|
{
|
|
int length;
|
|
|
|
/* TSRequest */
|
|
if (!ber_read_sequence_tag(s, &length) ||
|
|
!ber_read_contextual_tag(s, 0, &length, TRUE) ||
|
|
!ber_read_integer(s, &nla->version))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
/* [1] negoTokens (NegoData) */
|
|
if (ber_read_contextual_tag(s, 1, &length, TRUE) != FALSE)
|
|
{
|
|
if (!ber_read_sequence_tag(s, &length) || /* SEQUENCE OF NegoDataItem */
|
|
!ber_read_sequence_tag(s, &length) || /* NegoDataItem */
|
|
!ber_read_contextual_tag(s, 0, &length, TRUE) || /* [0] negoToken */
|
|
!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
|
|
((int) Stream_GetRemainingLength(s)) < length)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
if (!sspi_SecBufferAlloc(&nla->negoToken, length))
|
|
return -1;
|
|
|
|
Stream_Read(s, nla->negoToken.pvBuffer, length);
|
|
nla->negoToken.cbBuffer = length;
|
|
}
|
|
|
|
/* [2] authInfo (OCTET STRING) */
|
|
if (ber_read_contextual_tag(s, 2, &length, TRUE) != FALSE)
|
|
{
|
|
if (!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
|
|
((int) Stream_GetRemainingLength(s)) < length)
|
|
return -1;
|
|
|
|
if (!sspi_SecBufferAlloc(&nla->authInfo, length))
|
|
return -1;
|
|
|
|
Stream_Read(s, nla->authInfo.pvBuffer, length);
|
|
nla->authInfo.cbBuffer = length;
|
|
}
|
|
|
|
/* [3] pubKeyAuth (OCTET STRING) */
|
|
if (ber_read_contextual_tag(s, 3, &length, TRUE) != FALSE)
|
|
{
|
|
if (!ber_read_octet_string_tag(s, &length) || /* OCTET STRING */
|
|
((int) Stream_GetRemainingLength(s)) < length)
|
|
return -1;
|
|
|
|
if (!sspi_SecBufferAlloc(&nla->pubKeyAuth, length))
|
|
return -1;
|
|
|
|
Stream_Read(s, nla->pubKeyAuth.pvBuffer, length);
|
|
nla->pubKeyAuth.cbBuffer = length;
|
|
}
|
|
|
|
/* [4] errorCode (INTEGER) */
|
|
if (nla->version >= 3)
|
|
{
|
|
if (ber_read_contextual_tag(s, 4, &length, TRUE) != FALSE)
|
|
{
|
|
if (!ber_read_integer(s, &nla->errorCode))
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int nla_recv_pdu(rdpNla* nla, wStream* s)
|
|
{
|
|
if (nla_decode_ts_request(nla, s) < 1)
|
|
return -1;
|
|
|
|
if (nla->errorCode)
|
|
{
|
|
UINT32 code;
|
|
switch (nla->errorCode)
|
|
{
|
|
case STATUS_PASSWORD_MUST_CHANGE:
|
|
code = FREERDP_ERROR_CONNECT_PASSWORD_MUST_CHANGE;
|
|
break;
|
|
|
|
case STATUS_PASSWORD_EXPIRED:
|
|
code = FREERDP_ERROR_CONNECT_PASSWORD_EXPIRED;
|
|
break;
|
|
|
|
case STATUS_ACCOUNT_DISABLED:
|
|
code = FREERDP_ERROR_CONNECT_ACCOUNT_DISABLED;
|
|
break;
|
|
|
|
case STATUS_LOGON_FAILURE:
|
|
code = FREERDP_ERROR_CONNECT_LOGON_FAILURE;
|
|
break;
|
|
|
|
case STATUS_WRONG_PASSWORD:
|
|
code = FREERDP_ERROR_CONNECT_WRONG_PASSWORD;
|
|
break;
|
|
|
|
case STATUS_ACCESS_DENIED:
|
|
code = FREERDP_ERROR_CONNECT_ACCESS_DENIED;
|
|
break;
|
|
|
|
case STATUS_ACCOUNT_RESTRICTION:
|
|
code = FREERDP_ERROR_CONNECT_ACCOUNT_RESTRICTION;
|
|
break;
|
|
|
|
case STATUS_ACCOUNT_LOCKED_OUT:
|
|
code = FREERDP_ERROR_CONNECT_ACCOUNT_LOCKED_OUT;
|
|
break;
|
|
|
|
case STATUS_ACCOUNT_EXPIRED:
|
|
code = FREERDP_ERROR_CONNECT_ACCOUNT_EXPIRED;
|
|
break;
|
|
|
|
case STATUS_LOGON_TYPE_NOT_GRANTED:
|
|
code = FREERDP_ERROR_CONNECT_LOGON_TYPE_NOT_GRANTED;
|
|
break;
|
|
|
|
default:
|
|
WLog_ERR(TAG, "SPNEGO failed with NTSTATUS: 0x%08"PRIX32"", nla->errorCode);
|
|
code = FREERDP_ERROR_AUTHENTICATION_FAILED;
|
|
break;
|
|
}
|
|
freerdp_set_last_error(nla->instance->context, code);
|
|
return -1;
|
|
}
|
|
|
|
if (nla_client_recv(nla) < 1)
|
|
return -1;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int nla_recv(rdpNla* nla)
|
|
{
|
|
wStream* s;
|
|
int status;
|
|
s = Stream_New(NULL, 4096);
|
|
|
|
if (!s)
|
|
{
|
|
WLog_ERR(TAG, "Stream_New failed!");
|
|
return -1;
|
|
}
|
|
|
|
status = transport_read_pdu(nla->transport, s);
|
|
|
|
if (status < 0)
|
|
{
|
|
WLog_ERR(TAG, "nla_recv() error: %d", status);
|
|
Stream_Free(s, TRUE);
|
|
return -1;
|
|
}
|
|
|
|
if (nla_decode_ts_request(nla, s) < 1)
|
|
{
|
|
Stream_Free(s, TRUE);
|
|
return -1;
|
|
}
|
|
|
|
Stream_Free(s, TRUE);
|
|
return 1;
|
|
}
|
|
|
|
void nla_buffer_print(rdpNla* nla)
|
|
{
|
|
if (nla->negoToken.cbBuffer > 0)
|
|
{
|
|
WLog_DBG(TAG, "NLA.negoToken (length = %"PRIu32"):", nla->negoToken.cbBuffer);
|
|
winpr_HexDump(TAG, WLOG_DEBUG, nla->negoToken.pvBuffer, nla->negoToken.cbBuffer);
|
|
}
|
|
|
|
if (nla->pubKeyAuth.cbBuffer > 0)
|
|
{
|
|
WLog_DBG(TAG, "NLA.pubKeyAuth (length = %"PRIu32"):", nla->pubKeyAuth.cbBuffer);
|
|
winpr_HexDump(TAG, WLOG_DEBUG, nla->pubKeyAuth.pvBuffer, nla->pubKeyAuth.cbBuffer);
|
|
}
|
|
|
|
if (nla->authInfo.cbBuffer > 0)
|
|
{
|
|
WLog_DBG(TAG, "NLA.authInfo (length = %"PRIu32"):", nla->authInfo.cbBuffer);
|
|
winpr_HexDump(TAG, WLOG_DEBUG, nla->authInfo.pvBuffer, nla->authInfo.cbBuffer);
|
|
}
|
|
}
|
|
|
|
void nla_buffer_free(rdpNla* nla)
|
|
{
|
|
sspi_SecBufferFree(&nla->negoToken);
|
|
sspi_SecBufferFree(&nla->pubKeyAuth);
|
|
sspi_SecBufferFree(&nla->authInfo);
|
|
}
|
|
|
|
LPTSTR nla_make_spn(const char* ServiceClass, const char* hostname)
|
|
{
|
|
DWORD status;
|
|
DWORD SpnLength;
|
|
LPTSTR hostnameX = NULL;
|
|
LPTSTR ServiceClassX = NULL;
|
|
LPTSTR ServicePrincipalName = NULL;
|
|
#ifdef UNICODE
|
|
ConvertToUnicode(CP_UTF8, 0, hostname, -1, &hostnameX, 0);
|
|
ConvertToUnicode(CP_UTF8, 0, ServiceClass, -1, &ServiceClassX, 0);
|
|
#else
|
|
hostnameX = _strdup(hostname);
|
|
ServiceClassX = _strdup(ServiceClass);
|
|
#endif
|
|
|
|
if (!hostnameX || !ServiceClassX)
|
|
{
|
|
free(hostnameX);
|
|
free(ServiceClassX);
|
|
return NULL;
|
|
}
|
|
|
|
if (!ServiceClass)
|
|
{
|
|
ServicePrincipalName = (LPTSTR) _tcsdup(hostnameX);
|
|
free(ServiceClassX);
|
|
free(hostnameX);
|
|
return ServicePrincipalName;
|
|
}
|
|
|
|
SpnLength = 0;
|
|
status = DsMakeSpn(ServiceClassX, hostnameX, NULL, 0, NULL, &SpnLength, NULL);
|
|
|
|
if (status != ERROR_BUFFER_OVERFLOW)
|
|
{
|
|
free(ServiceClassX);
|
|
free(hostnameX);
|
|
return NULL;
|
|
}
|
|
|
|
ServicePrincipalName = (LPTSTR) calloc(SpnLength, sizeof(TCHAR));
|
|
|
|
if (!ServicePrincipalName)
|
|
{
|
|
free(ServiceClassX);
|
|
free(hostnameX);
|
|
return NULL;
|
|
}
|
|
|
|
status = DsMakeSpn(ServiceClassX, hostnameX, NULL, 0, NULL, &SpnLength, ServicePrincipalName);
|
|
|
|
if (status != ERROR_SUCCESS)
|
|
{
|
|
free(ServicePrincipalName);
|
|
free(ServiceClassX);
|
|
free(hostnameX);
|
|
return NULL;
|
|
}
|
|
|
|
free(ServiceClassX);
|
|
free(hostnameX);
|
|
return ServicePrincipalName;
|
|
}
|
|
|
|
/**
|
|
* Create new CredSSP state machine.
|
|
* @param transport
|
|
* @return new CredSSP state machine.
|
|
*/
|
|
|
|
rdpNla* nla_new(freerdp* instance, rdpTransport* transport, rdpSettings* settings)
|
|
{
|
|
rdpNla* nla = (rdpNla*) calloc(1, sizeof(rdpNla));
|
|
|
|
if (!nla)
|
|
return NULL;
|
|
|
|
nla->identity = calloc(1, sizeof(SEC_WINNT_AUTH_IDENTITY));
|
|
if (!nla->identity)
|
|
{
|
|
free(nla);
|
|
return NULL;
|
|
}
|
|
|
|
nla->instance = instance;
|
|
nla->settings = settings;
|
|
nla->server = settings->ServerMode;
|
|
nla->transport = transport;
|
|
nla->sendSeqNum = 0;
|
|
nla->recvSeqNum = 0;
|
|
nla->version = 3;
|
|
|
|
if (settings->NtlmSamFile)
|
|
{
|
|
nla->SamFile = _strdup(settings->NtlmSamFile);
|
|
|
|
if (!nla->SamFile)
|
|
{
|
|
free(nla->identity);
|
|
free(nla);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
ZeroMemory(&nla->negoToken, sizeof(SecBuffer));
|
|
ZeroMemory(&nla->pubKeyAuth, sizeof(SecBuffer));
|
|
ZeroMemory(&nla->authInfo, sizeof(SecBuffer));
|
|
SecInvalidateHandle(&nla->context);
|
|
|
|
if (nla->server)
|
|
{
|
|
LONG status;
|
|
HKEY hKey;
|
|
DWORD dwType;
|
|
DWORD dwSize;
|
|
status = RegOpenKeyExA(HKEY_LOCAL_MACHINE, SERVER_KEY,
|
|
0, KEY_READ | KEY_WOW64_64KEY, &hKey);
|
|
|
|
if (status != ERROR_SUCCESS)
|
|
return nla;
|
|
|
|
status = RegQueryValueEx(hKey, _T("SspiModule"), NULL, &dwType, NULL, &dwSize);
|
|
|
|
if (status != ERROR_SUCCESS)
|
|
{
|
|
RegCloseKey(hKey);
|
|
return nla;
|
|
}
|
|
|
|
nla->SspiModule = (LPTSTR) malloc(dwSize + sizeof(TCHAR));
|
|
|
|
if (!nla->SspiModule)
|
|
{
|
|
RegCloseKey(hKey);
|
|
free(nla);
|
|
return NULL;
|
|
}
|
|
|
|
status = RegQueryValueEx(hKey, _T("SspiModule"), NULL, &dwType,
|
|
(BYTE*) nla->SspiModule, &dwSize);
|
|
|
|
if (status == ERROR_SUCCESS)
|
|
WLog_INFO(TAG, "Using SSPI Module: %s", nla->SspiModule);
|
|
|
|
RegCloseKey(hKey);
|
|
}
|
|
|
|
return nla;
|
|
}
|
|
|
|
/**
|
|
* Free CredSSP state machine.
|
|
* @param credssp
|
|
*/
|
|
|
|
void nla_free(rdpNla* nla)
|
|
{
|
|
if (!nla)
|
|
return;
|
|
|
|
if (nla->table)
|
|
{
|
|
SECURITY_STATUS status;
|
|
if (SecIsValidHandle(&nla->credentials))
|
|
{
|
|
status = nla->table->FreeCredentialsHandle(&nla->credentials);
|
|
SecInvalidateHandle(&nla->credentials);
|
|
}
|
|
|
|
status = nla->table->DeleteSecurityContext(&nla->context);
|
|
|
|
if (status != SEC_E_OK)
|
|
{
|
|
WLog_WARN(TAG, "DeleteSecurityContext status %s [0x%08"PRIX32"]",
|
|
GetSecurityStatusString(status), status);
|
|
}
|
|
}
|
|
|
|
free(nla->SamFile);
|
|
nla->SamFile = NULL;
|
|
sspi_SecBufferFree(&nla->PublicKey);
|
|
sspi_SecBufferFree(&nla->tsCredentials);
|
|
free(nla->ServicePrincipalName);
|
|
nla_identity_free(nla->identity);
|
|
free(nla);
|
|
}
|