mirrors/FreeRDP
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Implement support for RDS AAD

Browse Source 
Have a working implementation of the RDS AAD enhanced security mechanism
for Azure AD logons
This commit is contained in:
fifthdegree 2023-03-07 20:06:47 -05:00 committed by akallabeth
parent 5df4d4c934
commit 4cbfa006f2
19 changed files with 947 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
client/common/client.c
View File

@ -60,6 +60,8 @@
#include <freerdp/log.h>
#define TAG CLIENT_TAG("common")
#define OAUTH2_CLIENT_ID "5177bc73-fd99-4c77-a90c-76844c9b6999"
static BOOL freerdp_client_common_new(freerdp* instance, rdpContext* context)
{
RDP_CLIENT_ENTRY_POINTS* pEntryPoints;
@ -74,6 +76,7 @@ static BOOL freerdp_client_common_new(freerdp* instance, rdpContext* context)
instance->VerifyChangedCertificateEx = client_cli_verify_changed_certificate_ex;
instance->PresentGatewayMessage = client_cli_present_gateway_message;
instance->LogonErrorInfo = client_cli_logon_error_info;
instance->GetAadAuthCode = client_cli_get_aad_auth_code;
pEntryPoints = instance->pClientEntryPoints;
WINPR_ASSERT(pEntryPoints);
@ -934,6 +937,35 @@ BOOL client_cli_present_gateway_message(freerdp* instance, UINT32 type, BOOL isD
return TRUE;
}
BOOL client_cli_get_aad_auth_code(const char* hostname, char** code)
{
size_t len = 0;
char* p = NULL;
WINPR_ASSERT(hostname);
WINPR_ASSERT(code);
*code = NULL;
printf(
"Browse to: "
"https://login.microsoftonline.com/common/oauth2/v2.0/authorize?client_id=" OAUTH2_CLIENT_ID
"&response_type=code"
"&scope=ms-device-service%%3A%%2F%%2Ftermsrv.wvd.microsoft.com%%2Fname%%2F%s%%2Fuser_"
"impersonation"
"&redirect_uri=ms-appx-web%%3a%%2f%%2fMicrosoft.AAD.BrokerPlugin%%2f5177bc73-fd99-4c77-"
"a90c-76844c9b6999\n",
hostname);
printf("Paste authorization code here: ");
if (GetLine(code, &len, stdin) < 0)
return FALSE;
p = strpbrk(*code, "\r\n");
if (p)
*p = 0;
return TRUE;
}
BOOL client_auto_reconnect(freerdp* instance)
{
return client_auto_reconnect_ex(instance, NULL);

11
client/common/cmdline.c
View File

@ -3598,6 +3598,10 @@ int freerdp_client_settings_parse_command_line_arguments(rdpSettings* settings,
}
CommandLineSwitchCase(arg, "sec")
{
BOOL RdpSecurity = FALSE;
BOOL TlsSecurity = FALSE;
BOOL NlaSecurity = FALSE;
BOOL ExtSecurity = FALSE;
size_t count = 0, x;
char** ptr = CommandLineParseCommaSeparatedValues(arg->Value, &count);
if (count == 0)
@ -3628,6 +3632,8 @@ int freerdp_client_settings_parse_command_line_arguments(rdpSettings* settings,
id = FreeRDP_NlaSecurity;
else if (option_starts_with("ext", cur)) /* NLA Extended */
id = FreeRDP_ExtSecurity;
else if (option_equals("aad", cur)) /* RDSAAD */
id = FreeRDP_AadSecurity;
else
{
WLog_ERR(TAG, "unknown protocol security: %s", arg->Value);
@ -3643,8 +3649,9 @@ int freerdp_client_settings_parse_command_line_arguments(rdpSettings* settings,
if (singleOptionWithoutOnOff != 0)
{
const size_t options[] = { FreeRDP_UseRdpSecurityLayer, FreeRDP_RdpSecurity,
FreeRDP_NlaSecurity, FreeRDP_TlsSecurity };
const size_t options[] = { FreeRDP_AadSecurity, FreeRDP_UseRdpSecurityLayer,
FreeRDP_RdpSecurity, FreeRDP_NlaSecurity,
FreeRDP_TlsSecurity };
for (size_t x = 0; x < ARRAYSIZE(options); x++)
{

2
include/freerdp/client.h
View File

@ -155,6 +155,8 @@ extern "C"
FREERDP_API int client_cli_logon_error_info(freerdp* instance, UINT32 data, UINT32 type);
FREERDP_API BOOL client_cli_get_aad_auth_code(const char* hostname, char** code);
FREERDP_API void
freerdp_client_OnChannelConnectedEventHandler(void* context,
const ChannelConnectedEventArgs* e);

7
include/freerdp/freerdp.h
View File

@ -83,6 +83,7 @@ extern "C"
CONNECTION_STATE_INITIAL,
CONNECTION_STATE_NEGO,
CONNECTION_STATE_NLA,
CONNECTION_STATE_AAD,
CONNECTION_STATE_MCS_CREATE_REQUEST,
CONNECTION_STATE_MCS_CREATE_RESPONSE,
CONNECTION_STATE_MCS_ERECT_DOMAIN,
@ -138,6 +139,7 @@ extern "C"
char** domain, rdp_auth_reason reason);
typedef BOOL (*pChooseSmartcard)(freerdp* instance, SmartcardCertInfo** cert_list, DWORD count,
DWORD* choice, BOOL gateway);
typedef BOOL (*pGetAadAuthCode)(const char* hostname, char** code);
/** @brief Callback used if user interaction is required to accept
* an unknown certificate.
@ -530,7 +532,10 @@ owned by rdpRdp */
Callback for choosing a smartcard for logon.
Used when multiple smartcards are available. Returns an index into a list
of SmartcardCertInfo pointers */
UINT64 paddingE[80 - 71]; /* 71 */
ALIGN64 pGetAadAuthCode GetAadAuthCode; /* (offset 71)
Callback for obtaining an oauth2 authorization
code for RDS AAD authentication */
UINT64 paddingE[80 - 72]; /* 71 */
};
struct rdp_channel_handles

4
include/freerdp/settings.h
View File

@ -632,6 +632,7 @@ typedef struct
#define FreeRDP_TlsSecretsFile (1109)
#define FreeRDP_AuthenticationPackageList (1110)
#define FreeRDP_RdstlsSecurity (1111)
#define FreeRDP_AadSecurity (1112)
#define FreeRDP_MstscCookieMode (1152)
#define FreeRDP_CookieMaxLength (1153)
#define FreeRDP_PreconnectionId (1154)
@ -1144,7 +1145,8 @@ struct rdp_settings
ALIGN64 char* TlsSecretsFile; /* 1109 */
ALIGN64 char* AuthenticationPackageList; /* 1110 */
ALIGN64 BOOL RdstlsSecurity; /* 1111 */
UINT64 padding1152[1152 - 1112]; /* 1112 */
ALIGN64 BOOL AadSecurity; /* 1112 */
UINT64 padding1152[1152 - 1113]; /* 1113 */
/* Connection Cookie */
ALIGN64 BOOL MstscCookieMode; /* 1152 */

7
libfreerdp/common/settings_getters.c
View File

@ -57,6 +57,9 @@ BOOL freerdp_settings_get_bool(const rdpSettings* settings, size_t id)
switch (id)
{
case FreeRDP_AadSecurity:
return settings->AadSecurity;
case FreeRDP_AllowCacheWaitingList:
return settings->AllowCacheWaitingList;
@ -614,6 +617,10 @@ BOOL freerdp_settings_set_bool(rdpSettings* settings, size_t id, BOOL val)
switch (id)
{
case FreeRDP_AadSecurity:
settings->AadSecurity = cnv.c;
break;
case FreeRDP_AllowCacheWaitingList:
settings->AllowCacheWaitingList = cnv.c;
break;

1
libfreerdp/common/settings_str.c
View File

@ -27,6 +27,7 @@ struct settings_str_entry
const char* str;
};
static const struct settings_str_entry settings_map[] = {
{ FreeRDP_AadSecurity, FREERDP_SETTINGS_TYPE_BOOL, "FreeRDP_AadSecurity" },
{ FreeRDP_AllowCacheWaitingList, FREERDP_SETTINGS_TYPE_BOOL, "FreeRDP_AllowCacheWaitingList" },
{ FreeRDP_AllowDesktopComposition, FREERDP_SETTINGS_TYPE_BOOL,
"FreeRDP_AllowDesktopComposition" },

5
libfreerdp/core/CMakeLists.txt
View File

@ -134,7 +134,10 @@ set(${MODULE_PREFIX}_SRCS
credssp_auth.c
credssp_auth.h
rdstls.c
rdstls.h)
rdstls.h
aad.c
aad.h
)
set(${MODULE_PREFIX}_SRCS ${${MODULE_PREFIX}_SRCS} ${${MODULE_PREFIX}_GATEWAY_SRCS})

623
libfreerdp/core/aad.c Normal file
View File

@ -0,0 +1,623 @@
/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Network Level Authentication (NLA)
*
* Copyright 2023 Isaac Klein <fifthdegree@protonmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <freerdp/config.h>
#include <stdio.h>
#include <freerdp/crypto/crypto.h>
#include <freerdp/utils/json.h>
#include <winpr/crypto.h>
#include <openssl/ssl.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/core_names.h>
#include <openssl/err.h>
#include "transport.h"
#include "aad.h"
#define TAG FREERDP_TAG("aad")
#define LOG_ERROR_AND_GOTO(label, ...) \
do \
{ \
WLog_ERR(TAG, __VA_ARGS__); \
goto label; \
} while (0);
#define LOG_ERROR_AND_RETURN(ret, ...) \
do \
{ \
WLog_ERR(TAG, __VA_ARGS__); \
return ret; \
} while (0);
#define XFREE(x) \
do \
{ \
free(x); \
x = NULL; \
} while (0);
#define OAUTH2_CLIENT_ID "5177bc73-fd99-4c77-a90c-76844c9b6999"
static const char* auth_server = "login.microsoftonline.com";
static const char nonce_http_request[] = ""
"POST /common/oauth2/token HTTP/1.1\r\n"
"Host: login.microsoftonline.com\r\n"
"Content-Type: application/x-www-form-urlencoded\r\n"
"Content-Length: 24\r\n"
"\r\n"
"grant_type=srv_challenge"
"\r\n\r\n";
static const char token_http_request_header[] =
""
"POST /common/oauth2/v2.0/token HTTP/1.1\r\n"
"Host: login.microsoftonline.com\r\n"
"Content-Type: application/x-www-form-urlencoded\r\n"
"Content-Length: %lu\r\n"
"\r\n";
static const char token_http_request_body[] =
""
"client_id=" OAUTH2_CLIENT_ID "&grant_type=authorization_code"
"&code=%s"
"&scope=ms-device-service%%3A%%2F%%2Ftermsrv.wvd.microsoft.com%%2Fname%%2F%s%%2Fuser_"
"impersonation"
"&req_cnf=%s"
"&redirect_uri=ms-appx-web%%3a%%2f%%2fMicrosoft.AAD.BrokerPlugin%%2f5177bc73-fd99-4c77-a90c-"
"76844c9b6999"
"\r\n\r\n";
struct rdp_aad
{
enum AAD_STATE state;
rdpContext* rdpcontext;
rdpTransport* transport;
char* access_token;
EVP_PKEY* pop_key;
char* kid;
char* nonce;
char* hostname;
};
static int alloc_sprintf(char** s, const char* template, ...);
static BOOL get_encoded_rsa_params(EVP_PKEY* pkey, char** e, char** n);
static BOOL generate_pop_key(rdpAad* aad);
static BOOL read_http_message(BIO* bio, long* status_code, char** content, size_t* content_length);
static int print_error(const char* str, size_t len, void* u)
{
WLog_ERR(TAG, "%s", str);
return 1;
}
rdpAad* aad_new(rdpContext* context, rdpTransport* transport)
{
WINPR_ASSERT(transport);
WINPR_ASSERT(context);
rdpAad* aad = (rdpAad*)calloc(1, sizeof(rdpAad));
if (!aad)
return NULL;
aad->rdpcontext = context;
aad->transport = transport;
return aad;
}
int aad_client_begin(rdpAad* aad)
{
int ret = -1;
SSL_CTX* ssl_ctx = NULL;
BIO* bio = NULL;
char* auth_code = NULL;
char *buffer = NULL, *req_header = NULL, *req_body = NULL;
size_t length = 0;
const char* hostname = NULL;
char* p = NULL;
const char* token = NULL;
long status_code;
JSON* json = NULL;
JSON* prop = NULL;
WINPR_ASSERT(aad);
WINPR_ASSERT(aad->rdpcontext);
rdpSettings* settings = aad->rdpcontext->settings;
WINPR_ASSERT(settings);
freerdp* instance = aad->rdpcontext->instance;
WINPR_ASSERT(instance);
/* Get the host part of the hostname */
hostname = freerdp_settings_get_string(settings, FreeRDP_ServerHostname);
if (!hostname || !(aad->hostname = _strdup(hostname)))
LOG_ERROR_AND_GOTO(fail, "Unable to get hostname");
if ((p = strchr(aad->hostname, '.')))
*p = '\0';
if (!generate_pop_key(aad))
LOG_ERROR_AND_GOTO(fail, "Unable to generate pop key");
/* Obtain an oauth authorization code */
if (!instance->GetAadAuthCode || !instance->GetAadAuthCode(aad->hostname, &auth_code))
LOG_ERROR_AND_GOTO(fail, "Unable to obtain authorization code");
/* Set up an ssl connection to the authorization server */
if (!(ssl_ctx = SSL_CTX_new(TLS_client_method())))
LOG_ERROR_AND_GOTO(fail, "Error setting up SSL context");
SSL_CTX_set_default_verify_paths(ssl_ctx);
SSL_CTX_set_mode(ssl_ctx, SSL_MODE_AUTO_RETRY);
if (!(bio = BIO_new_ssl_connect(ssl_ctx)))
LOG_ERROR_AND_GOTO(fail, "Error setting up connection");
BIO_set_conn_hostname(bio, auth_server);
BIO_set_conn_port(bio, "https");
/* Construct and send the token request message */
length = alloc_sprintf(&req_body, token_http_request_body, auth_code, aad->hostname, aad->kid);
if (length < 0)
goto fail;
if (alloc_sprintf(&req_header, token_http_request_header, length) < 0)
goto fail;
WLog_DBG(TAG, "HTTP access token request: %s%s", req_header, req_body);
ERR_clear_error();
if (BIO_write(bio, req_header, strlen(req_header)) < 0)
{
ERR_print_errors_cb(print_error, NULL);
goto fail;
}
ERR_clear_error();
if (BIO_write(bio, req_body, strlen(req_body)) < 0)
{
ERR_print_errors_cb(print_error, NULL);
goto fail;
}
/* Read in the response */
if (!read_http_message(bio, &status_code, &buffer, &length))
LOG_ERROR_AND_GOTO(fail, "Unable to read access token HTTP response");
WLog_DBG(TAG, "HTTP access token response: %s", buffer);
if (status_code != 200)
LOG_ERROR_AND_GOTO(fail, "Received status code: %li", status_code);
/* Extract the access token from the JSON response */
if (!(json = json_parse(buffer)))
LOG_ERROR_AND_GOTO(fail, "Failed to parse JSON response");
if (!json_object_get_prop(json, "access_token", &prop) || !json_string_get(prop, &token))
LOG_ERROR_AND_GOTO(fail, "Could not find \"access_token\" property in JSON response");
if (!(aad->access_token = _strdup(token)))
goto fail;
XFREE(buffer);
json_free(json);
json = NULL;
/* Send the nonce request message */
WLog_DBG(TAG, "HTTP nonce request: %s", nonce_http_request);
ERR_clear_error();
if (BIO_write(bio, nonce_http_request, strlen(nonce_http_request)) < 0)
{
ERR_print_errors_cb(print_error, NULL);
goto fail;
}
/* Read in the response */
if (!read_http_message(bio, &status_code, &buffer, &length))
LOG_ERROR_AND_GOTO(fail, "Unable to read HTTP response");
WLog_DBG(TAG, "HTTP nonce response: %s", buffer);
if (status_code != 200)
LOG_ERROR_AND_GOTO(fail, "Received status code: %li", status_code);
/* Extract the nonce from the response */
if (!(json = json_parse(buffer)))
LOG_ERROR_AND_GOTO(fail, "Failed to parse JSON response");
if (!json_object_get_prop(json, "Nonce", &prop) || !json_string_get(prop, &token))
LOG_ERROR_AND_GOTO(fail, "Could not find \"Nonce\" property in JSON response");
if (!(aad->nonce = _strdup(token)))
goto fail;
ret = 1;
fail:
json_free(json);
free(buffer);
free(req_body);
free(req_header);
BIO_free_all(bio);
SSL_CTX_free(ssl_ctx);
free(auth_code);
return ret;
}
static int aad_send_auth_request(rdpAad* aad, const char* ts_nonce)
{
int ret = -1;
char* jws_header = NULL;
char* jws_payload = NULL;
char* jws_signature = NULL;
char* buffer = NULL;
wStream* s = NULL;
time_t ts = time(NULL);
char *e = NULL, *n = NULL;
size_t length = 0;
EVP_MD_CTX* md_ctx = NULL;
WINPR_ASSERT(aad);
WINPR_ASSERT(ts_nonce);
/* Construct the base64url encoded JWS header */
if ((length = alloc_sprintf(&buffer, "{\"alg\":\"RS256\",\"kid\":\"%s\"}", aad->kid)) < 0)
goto fail;
if (!(jws_header = crypto_base64url_encode((BYTE*)buffer, strlen(buffer))))
goto fail;
XFREE(buffer);
if (!get_encoded_rsa_params(aad->pop_key, &e, &n))
LOG_ERROR_AND_GOTO(fail, "Error getting RSA key params");
/* Construct the base64url encoded JWS payload */
length = alloc_sprintf(&buffer,
"{"
"\"ts\":\"%li\","
"\"at\":\"%s\","
"\"u\":\"ms-device-service://termsrv.wvd.microsoft.com/name/%s\","
"\"nonce\":\"%s\","
"\"cnf\":{\"jwk\":{\"kty\":\"RSA\",\"e\":\"%s\",\"n\":\"%s\"}},"
"\"client_claims\":\"{\\\"aad_nonce\\\":\\\"%s\\\"}\""
"}",
ts, aad->access_token, aad->hostname, ts_nonce, e, n, aad->nonce);
if (length < 0)
goto fail;
if (!(jws_payload = crypto_base64url_encode((BYTE*)buffer, strlen(buffer))))
goto fail;
XFREE(buffer);
/* Sign the JWS with the pop key */
if (!(md_ctx = EVP_MD_CTX_new()))
goto fail;
if (!(EVP_DigestSignInit(md_ctx, NULL, EVP_sha256(), NULL, aad->pop_key)))
LOG_ERROR_AND_GOTO(fail, "Error while initializing signature context");
if (!(EVP_DigestSignUpdate(md_ctx, jws_header, strlen(jws_header))))
LOG_ERROR_AND_GOTO(fail, "Error while signing data");
if (!(EVP_DigestSignUpdate(md_ctx, ".", 1)))
LOG_ERROR_AND_GOTO(fail, "Error while signing data");
if (!(EVP_DigestSignUpdate(md_ctx, jws_payload, strlen(jws_payload))))
LOG_ERROR_AND_GOTO(fail, "Error while signing data");
if (!(EVP_DigestSignFinal(md_ctx, NULL, &length)))
LOG_ERROR_AND_GOTO(fail, "Error while signing data");
if (!(buffer = malloc(length)))
goto fail;
if (!(EVP_DigestSignFinal(md_ctx, (BYTE*)buffer, &length)))
LOG_ERROR_AND_GOTO(fail, "Error while signing data");
if (!(jws_signature = crypto_base64url_encode((BYTE*)buffer, length)))
goto fail;
/* Construct the Authentication Request PDU with the JWS as the RDP Assertion */
length = _snprintf(NULL, 0, "{\"rdp_assertion\":\"%s.%s.%s\"}", jws_header, jws_payload,
jws_signature) +
1;
if (length < 0)
goto fail;
if (!(s = Stream_New(NULL, length)))
goto fail;
_snprintf(Stream_PointerAs(s, char), length, "{\"rdp_assertion\":\"%s.%s.%s\"}", jws_header,
jws_payload, jws_signature);
Stream_Seek(s, length);
if (transport_write(aad->transport, s) < 0)
LOG_ERROR_AND_GOTO(fail, "Failed to send Authentication Request PDU");
ret = 1;
aad->state = AAD_STATE_AUTH;
fail:
Stream_Free(s, TRUE);
free(e);
free(n);
free(buffer);
free(jws_header);
free(jws_payload);
free(jws_signature);
EVP_MD_CTX_free(md_ctx);
return ret;
}
int aad_recv(rdpAad* aad, wStream* s)
{
JSON* json;
JSON* prop;
WINPR_ASSERT(aad);
WINPR_ASSERT(s);
if (aad->state == AAD_STATE_INITIAL)
{
const char* ts_nonce = NULL;
int ret = 0;
if (!(json = json_parse(Stream_PointerAs(s, char))))
LOG_ERROR_AND_RETURN(-1, "Failed to parse Server Nonce PDU");
if (!json_object_get_prop(json, "ts_nonce", &prop) || !json_string_get(prop, &ts_nonce))
{
json_free(json);
WLog_ERR(TAG, "Failed to find ts_nonce in PDU");
return -1;
}
Stream_Seek(s, Stream_Length(s));
ret = aad_send_auth_request(aad, ts_nonce);
json_free(json);
return ret;
}
else if (aad->state == AAD_STATE_AUTH)
{
double result = 0;
if (!(json = json_parse(Stream_PointerAs(s, char))))
LOG_ERROR_AND_RETURN(-1, "Failed to parse Authentication Result PDU");
if (!json_object_get_prop(json, "authentication_result", &prop) ||
!json_number_get(prop, &result))
{
json_free(json);
WLog_ERR(TAG, "Failed to find authentication_result in PDU");
return -1;
}
json_free(json);
Stream_Seek(s, Stream_Length(s));
if (result != 0)
LOG_ERROR_AND_RETURN(-1, "Authentication result: %d", (int)result);
aad->state = AAD_STATE_FINAL;
return 1;
}
else
LOG_ERROR_AND_RETURN(-1, "Invalid state");
}
enum AAD_STATE aad_get_state(rdpAad* aad)
{
if (!aad)
return AAD_STATE_FINAL;
return aad->state;
}
void aad_free(rdpAad* aad)
{
if (!aad)
return;
free(aad->hostname);
free(aad->nonce);
free(aad->access_token);
free(aad->kid);
EVP_PKEY_free(aad->pop_key);
free(aad);
}
static BOOL read_http_message(BIO* bio, long* status_code, char** content, size_t* content_length)
{
char buffer[1024] = { 0 };
WINPR_ASSERT(status_code);
WINPR_ASSERT(content);
WINPR_ASSERT(content_length);
if (BIO_get_line(bio, buffer, sizeof(buffer)) <= 0)
LOG_ERROR_AND_RETURN(FALSE, "Error reading HTTP response");
if (sscanf(buffer, "HTTP/%*u.%*u %li %*[^\r\n]\r\n", status_code) < 1)
LOG_ERROR_AND_RETURN(FALSE, "Invalid HTTP response status line");
do
{
char* name = NULL;
char* val = NULL;
if (BIO_get_line(bio, buffer, sizeof(buffer)) <= 0)
LOG_ERROR_AND_RETURN(FALSE, "Error reading HTTP response");
name = strtok_r(buffer, ":", &val);
if (name && _stricmp(name, "content-length") == 0)
*content_length = strtoul(val, NULL, 10);
} while (strcmp(buffer, "\r\n") != 0);
if (*content_length == 0)
return TRUE;
if (!(*content = malloc(*content_length + 1)))
return FALSE;
(*content)[*content_length] = '\0';
if (BIO_read(bio, *content, *content_length) < *content_length)
{
free(*content);
LOG_ERROR_AND_RETURN(FALSE, "Error reading HTTP response body");
}
return TRUE;
}
static BOOL generate_pop_key(rdpAad* aad)
{
EVP_PKEY_CTX* ctx = NULL;
BOOL ret = FALSE;
size_t length = 0;
char* buffer = NULL;
char *e = NULL, *n = NULL;
WINPR_DIGEST_CTX* digest = NULL;
BYTE hash[WINPR_SHA256_DIGEST_LENGTH] = { 0 };
WINPR_ASSERT(aad);
/* Generate a 2048-bit RSA key pair */
if (!(ctx = EVP_PKEY_CTX_new_id(EVP_PKEY_RSA, NULL)))
return FALSE;
if (EVP_PKEY_keygen_init(ctx) <= 0)
LOG_ERROR_AND_GOTO(fail, "Error initializing keygen");
if (EVP_PKEY_CTX_set_rsa_keygen_bits(ctx, 2048) <= 0)
LOG_ERROR_AND_GOTO(fail, "Error setting RSA keygen bits");
if (EVP_PKEY_keygen(ctx, &aad->pop_key) <= 0)
LOG_ERROR_AND_GOTO(fail, "Error generating RSA pop token key");
/* Encode the public key as a JWK */
if (!get_encoded_rsa_params(aad->pop_key, &e, &n))
LOG_ERROR_AND_GOTO(fail, "Error getting RSA key params");
if ((length = alloc_sprintf(&buffer, "{\"e\":\"%s\",\"kty\":\"RSA\",\"n\":\"%s\"}", e, n)) < 0)
goto fail;
/* Hash the encoded public key */
if (!(digest = winpr_Digest_New()))
goto fail;
if (!winpr_Digest_Init(digest, WINPR_MD_SHA256))
LOG_ERROR_AND_GOTO(fail, "Error initializing SHA256 digest");
if (!winpr_Digest_Update(digest, (BYTE*)buffer, length))
LOG_ERROR_AND_GOTO(fail, "Unable to get hash of JWK");
if (!winpr_Digest_Final(digest, hash, WINPR_SHA256_DIGEST_LENGTH))
LOG_ERROR_AND_GOTO(fail, "Unable to get hash of JWK");
XFREE(buffer);
/* Base64url encode the hash */
if (!(buffer = crypto_base64url_encode(hash, WINPR_SHA256_DIGEST_LENGTH)))
goto fail;
/* Encode a JSON object with a single property "kid" whose value is the encoded hash */
{
char* buf2 = NULL;
if ((length = alloc_sprintf(&buf2, "{\"kid\":\"%s\"}", buffer)) < 0)
goto fail;
free(buffer);
buffer = buf2;
}
/* Finally, base64url encode the JSON text to form the kid */
if (!(aad->kid = crypto_base64url_encode((BYTE*)buffer, length)))
LOG_ERROR_AND_GOTO(fail, "Error base64url encoding kid");
ret = TRUE;
fail:
free(buffer);
free(e);
free(n);
winpr_Digest_Free(digest);
EVP_PKEY_CTX_free(ctx);
return ret;
}
static BOOL get_encoded_rsa_params(EVP_PKEY* pkey, char** e, char** n)
{
BIGNUM *bn_e = NULL, *bn_n = NULL;
BYTE buf[2048];
size_t length = 0;
*e = NULL;
*n = NULL;
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
if (!EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_E, &bn_e))
goto fail;
if (!EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_RSA_N, &bn_n))
goto fail;
#else
{
const RSA* rsa = NULL;
if (!(rsa = EVP_PKEY_get0_RSA(pkey)))
goto fail;
if (!(bn_e = BN_dup(RSA_get0_e(rsa))))
goto fail;
if (!(bn_n = BN_dup(RSA_get0_n(rsa))))
goto fail;
}
#endif
length = BN_num_bytes(bn_e);
if (length > sizeof(buf))
goto fail;
if (BN_bn2bin(bn_e, buf) < length)
goto fail;
*e = crypto_base64url_encode(buf, length);
length = BN_num_bytes(bn_n);
if (length > sizeof(buf))
goto fail;
if (BN_bn2bin(bn_n, buf) < length)
goto fail;
*n = crypto_base64url_encode(buf, length);
fail:
BN_free(bn_e);
BN_free(bn_n);
if (!(*e) || !(*n))
{
free(*e);
free(*n);
return FALSE;
}
return TRUE;
}
static int alloc_sprintf(char** s, const char* template, ...)
{
int length;
va_list ap;
WINPR_ASSERT(s);
*s = NULL;
va_start(ap, template);
length = vsnprintf(NULL, 0, template, ap);
va_end(ap);
if (!(*s = malloc(length + 1)))
return -1;
va_start(ap, template);
vsprintf(*s, template, ap);
va_end(ap);
return length;
}

43
libfreerdp/core/aad.h Normal file
View File

@ -0,0 +1,43 @@
/**
* FreeRDP: A Remote Desktop Protocol Implementation
* Network Level Authentication (NLA)
*
* Copyright 2023 Isaac Klein <fifthdegree@protonmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FREERDP_LIB_CORE_AAD_H
#define FREERDP_LIB_CORE_AAD_H
typedef struct rdp_aad rdpAad;
enum AAD_STATE
{
AAD_STATE_INITIAL,
AAD_STATE_AUTH,
AAD_STATE_FINAL
};
#include <freerdp/api.h>
#include <freerdp/freerdp.h>
FREERDP_LOCAL int aad_client_begin(rdpAad* aad);
FREERDP_LOCAL int aad_recv(rdpAad* aad, wStream* s);
FREERDP_LOCAL enum AAD_STATE aad_get_state(rdpAad* aad);
FREERDP_LOCAL rdpAad* aad_new(rdpContext* context, rdpTransport* transport);
FREERDP_LOCAL void aad_free(rdpAad* aad);
#endif /* FREERDP_LIB_CORE_AAD_H */

3
libfreerdp/core/connection.c
View File

@ -393,6 +393,7 @@ BOOL rdp_client_connect(rdpRdp* rdp)
nego_enable_nla(rdp->nego, settings->NlaSecurity);
nego_enable_ext(rdp->nego, settings->ExtSecurity);
nego_enable_rdstls(rdp->nego, settings->RdstlsSecurity);
nego_enable_aad(rdp->nego, settings->AadSecurity);
if (settings->MstscCookieMode)
settings->CookieMaxLength = MSTSC_COOKIE_MAX_LENGTH;
@ -1766,6 +1767,8 @@ const char* rdp_state_string(CONNECTION_STATE state)
return "CONNECTION_STATE_NEGO";
case CONNECTION_STATE_NLA:
return "CONNECTION_STATE_NLA";
case CONNECTION_STATE_AAD:
return "CONNECTION_STATE_AAD";
case CONNECTION_STATE_MCS_CREATE_REQUEST:
return "CONNECTION_STATE_MCS_CREATE_REQUEST";
case CONNECTION_STATE_MCS_CREATE_RESPONSE:

96
libfreerdp/core/nego.c
View File

@ -57,7 +57,7 @@ struct rdp_nego
UINT32 SelectedProtocol;
UINT32 RequestedProtocols;
BOOL NegotiateSecurityLayer;
BOOL EnabledProtocols[16];
BOOL EnabledProtocols[32];
BOOL RestrictedAdminModeRequired;
BOOL GatewayEnabled;
BOOL GatewayBypassLocal;
@ -68,10 +68,10 @@ struct rdp_nego
static const char* nego_state_string(NEGO_STATE state)
{
static const char* const NEGO_STATE_STRINGS[] = { "NEGO_STATE_INITIAL", "NEGO_STATE_RDSTLS",
"NEGO_STATE_EXT", "NEGO_STATE_NLA",
"NEGO_STATE_TLS", "NEGO_STATE_RDP",
"NEGO_STATE_FAIL", "NEGO_STATE_FINAL",
"NEGO_STATE_INVALID" };
"NEGO_STATE_AAD", "NEGO_STATE_EXT",
"NEGO_STATE_NLA", "NEGO_STATE_TLS",
"NEGO_STATE_RDP", "NEGO_STATE_FAIL",
"NEGO_STATE_FINAL", "NEGO_STATE_INVALID" };
if (state >= ARRAYSIZE(NEGO_STATE_STRINGS))
return NEGO_STATE_STRINGS[ARRAYSIZE(NEGO_STATE_STRINGS) - 1];
return NEGO_STATE_STRINGS[state];
@ -80,7 +80,9 @@ static const char* nego_state_string(NEGO_STATE state)
static const char* protocol_security_string(UINT32 security)
{
static const char* PROTOCOL_SECURITY_STRINGS[] = { "RDP", "TLS", "NLA", "UNK", "RDSTLS",
"UNK", "UNK", "UNK", "EXT", "UNK" };
"UNK", "UNK", "UNK", "EXT", "UNK",
"UNK", "UNK", "UNK", "UNK", "UNK",
"UNK", "AAD", "UNK", "UNK", "UNK" };
if (security >= ARRAYSIZE(PROTOCOL_SECURITY_STRINGS))
return PROTOCOL_SECURITY_STRINGS[ARRAYSIZE(PROTOCOL_SECURITY_STRINGS) - 1];
return PROTOCOL_SECURITY_STRINGS[security];
@ -116,7 +118,11 @@ BOOL nego_connect(rdpNego* nego)
if (nego_get_state(nego) == NEGO_STATE_INITIAL)
{
if (nego->EnabledProtocols[PROTOCOL_RDSTLS])
if (nego->EnabledProtocols[PROTOCOL_RDSAAD])
{
nego_set_state(nego, NEGO_STATE_AAD);
}
else if (nego->EnabledProtocols[PROTOCOL_RDSTLS])
{
nego_set_state(nego, NEGO_STATE_RDSTLS);
}
@ -147,6 +153,7 @@ BOOL nego_connect(rdpNego* nego)
{
WLog_DBG(TAG, "Security Layer Negotiation is disabled");
/* attempt only the highest enabled protocol (see nego_attempt_*) */
nego->EnabledProtocols[PROTOCOL_RDSAAD] = FALSE;
nego->EnabledProtocols[PROTOCOL_HYBRID] = FALSE;
nego->EnabledProtocols[PROTOCOL_SSL] = FALSE;
nego->EnabledProtocols[PROTOCOL_RDP] = FALSE;
@ -155,6 +162,10 @@ BOOL nego_connect(rdpNego* nego)
switch (nego_get_state(nego))
{
case NEGO_STATE_AAD:
nego->EnabledProtocols[PROTOCOL_RDSAAD] = TRUE;
nego->SelectedProtocol = PROTOCOL_RDSAAD;
break;
case NEGO_STATE_RDSTLS:
nego->EnabledProtocols[PROTOCOL_RDSTLS] = TRUE;
nego->SelectedProtocol = PROTOCOL_RDSTLS;
@ -272,7 +283,12 @@ BOOL nego_security_connect(rdpNego* nego)
}
else if (!nego->SecurityConnected)
{
if (nego->SelectedProtocol == PROTOCOL_RDSTLS)
if (nego->SelectedProtocol == PROTOCOL_RDSAAD)
{
WLog_DBG(TAG, "nego_security_connect with PROTOCOL_RDSAAD");
nego->SecurityConnected = transport_connect_aad(nego->transport);
}
else if (nego->SelectedProtocol == PROTOCOL_RDSTLS)
{
WLog_DBG(TAG, "nego_security_connect with PROTOCOL_RDSTLS");
nego->SecurityConnected = transport_connect_rdstls(nego->transport);
@ -500,6 +516,49 @@ static void nego_attempt_rdstls(rdpNego* nego)
}
}
static void nego_attempt_rdsaad(rdpNego* nego)
{
WINPR_ASSERT(nego);
nego->RequestedProtocols = PROTOCOL_RDSAAD;
WLog_DBG(TAG, "Attempting RDS AAD Auth security");
if (!nego_transport_connect(nego))
{
nego_set_state(nego, NEGO_STATE_FAIL);
return;
}
if (!nego_send_negotiation_request(nego))
{
nego_set_state(nego, NEGO_STATE_FAIL);
return;
}
if (!nego_recv_response(nego))
{
nego_set_state(nego, NEGO_STATE_FAIL);
return;
}
WLog_DBG(TAG, "state: %s", nego_state_string(nego_get_state(nego)));
if (nego_get_state(nego) != NEGO_STATE_FINAL)
{
nego_transport_disconnect(nego);
if (nego->EnabledProtocols[PROTOCOL_HYBRID_EX])
nego_set_state(nego, NEGO_STATE_EXT);
else if (nego->EnabledProtocols[PROTOCOL_HYBRID])
nego_set_state(nego, NEGO_STATE_NLA);
else if (nego->EnabledProtocols[PROTOCOL_SSL])
nego_set_state(nego, NEGO_STATE_TLS);
else if (nego->EnabledProtocols[PROTOCOL_RDP])
nego_set_state(nego, NEGO_STATE_RDP);
else
nego_set_state(nego, NEGO_STATE_FAIL);
}
}
static void nego_attempt_ext(rdpNego* nego)
{
WINPR_ASSERT(nego);
@ -720,6 +779,11 @@ int nego_recv(rdpTransport* transport, wStream* s, void* extra)
if (nego->SelectedProtocol)
{
if ((nego->SelectedProtocol == PROTOCOL_RDSAAD) &&
(!nego->EnabledProtocols[PROTOCOL_RDSAAD]))
{
nego_set_state(nego, NEGO_STATE_FAIL);
}
if ((nego->SelectedProtocol == PROTOCOL_HYBRID) &&
(!nego->EnabledProtocols[PROTOCOL_HYBRID]))
{
@ -921,6 +985,9 @@ void nego_send(rdpNego* nego)
switch (nego_get_state(nego))
{
case NEGO_STATE_AAD:
nego_attempt_rdsaad(nego);
break;
case NEGO_STATE_RDSTLS:
nego_attempt_rdstls(nego);
break;
@ -1620,6 +1687,19 @@ void nego_enable_ext(rdpNego* nego, BOOL enable_ext)
nego->EnabledProtocols[PROTOCOL_HYBRID_EX] = enable_ext;
}
/**
* Enable RDS AAD security protocol.
* @param nego A pointer to the NEGO struct pointer to the negotiation structure
* @param enable_ext whether to enable RDS AAD Auth protocol (TRUE for
* enabled, FALSE for disabled)
*/
void nego_enable_aad(rdpNego* nego, BOOL enable_aad)
{
WLog_DBG(TAG, "Enabling RDS AAD security: %s", enable_aad ? "TRUE" : "FALSE");
nego->EnabledProtocols[PROTOCOL_RDSAAD] = enable_aad;
}
/**
* Set routing token.
* @param nego A pointer to the NEGO struct

3
libfreerdp/core/nego.h
View File

@ -37,6 +37,7 @@
#define PROTOCOL_HYBRID 0x00000002
#define PROTOCOL_RDSTLS 0x00000004
#define PROTOCOL_HYBRID_EX 0x00000008
#define PROTOCOL_RDSAAD 0x00000010
#define PROTOCOL_FAILED_NEGO 0x80000000 /* only used internally, not on the wire */
@ -59,6 +60,7 @@ typedef enum
{
NEGO_STATE_INITIAL,
NEGO_STATE_RDSTLS, /* RDSTLS (TLS implicit) */
NEGO_STATE_AAD, /* Azure AD Authentication (TLS implicit) */
NEGO_STATE_EXT, /* Extended NLA (NLA + TLS implicit) */
NEGO_STATE_NLA, /* Network Level Authentication (TLS implicit) */
NEGO_STATE_TLS, /* TLS Encryption without NLA */
@ -122,6 +124,7 @@ FREERDP_LOCAL void nego_enable_rdp(rdpNego* nego, BOOL enable_rdp);
FREERDP_LOCAL void nego_enable_tls(rdpNego* nego, BOOL enable_tls);
FREERDP_LOCAL void nego_enable_nla(rdpNego* nego, BOOL enable_nla);
FREERDP_LOCAL void nego_enable_rdstls(rdpNego* nego, BOOL enable_rdstls);
FREERDP_LOCAL void nego_enable_aad(rdpNego* nego, BOOL enable_aad);
FREERDP_LOCAL void nego_enable_ext(rdpNego* nego, BOOL enable_ext);
FREERDP_LOCAL const BYTE* nego_get_routing_token(rdpNego* nego, DWORD* RoutingTokenLength);
FREERDP_LOCAL BOOL nego_set_routing_token(rdpNego* nego, const BYTE* RoutingToken,

20
libfreerdp/core/rdp.c
View File

@ -1783,6 +1783,25 @@ static state_run_t rdp_recv_callback_int(rdpTransport* transport, wStream* s, vo
}
break;
case CONNECTION_STATE_AAD:
if (aad_recv(rdp->aad, s) < 1)
{
WLog_ERR(TAG, "%s - aad_recv() fail", rdp_get_state_string(rdp));
status = STATE_RUN_FAILED;
}
if (state_run_success(status))
{
if (aad_get_state(rdp->aad) == AAD_STATE_FINAL)
{
transport_set_aad_mode(rdp->transport, FALSE);
if (!rdp_client_transition_to_state(rdp, CONNECTION_STATE_MCS_CREATE_REQUEST))
status = STATE_RUN_FAILED;
else
status = STATE_RUN_CONTINUE;
}
}
break;
case CONNECTION_STATE_MCS_CREATE_REQUEST:
if (!mcs_client_begin(rdp->mcs))
{
@ -2335,6 +2354,7 @@ void rdp_free(rdpRdp* rdp)
PubSub_Free(rdp->pubSub);
if (rdp->abortEvent)
CloseHandle(rdp->abortEvent);
aad_free(rdp->aad);
free(rdp);
}
}

2
libfreerdp/core/rdp.h
View File

@ -24,6 +24,7 @@
#include <freerdp/config.h>
#include "nla.h"
#include "aad.h"
#include "mcs.h"
#include "tpkt.h"
#include "../codec/bulk.h"
@ -146,6 +147,7 @@ struct rdp_rdp
CONNECTION_STATE state;
rdpContext* context;
rdpNla* nla;
rdpAad* aad;
rdpMcs* mcs;
rdpNego* nego;
rdpBulk* bulk;

1
libfreerdp/core/settings.c
View File

@ -384,6 +384,7 @@ rdpSettings* freerdp_settings_new(DWORD flags)
!freerdp_settings_set_bool(settings, FreeRDP_Decorations, TRUE) ||
!freerdp_settings_set_uint32(settings, FreeRDP_RdpVersion, RDP_VERSION_10_11) ||
!freerdp_settings_set_uint32(settings, FreeRDP_ColorDepth, 16) ||
!freerdp_settings_set_bool(settings, FreeRDP_AadSecurity, FALSE) ||
!freerdp_settings_set_bool(settings, FreeRDP_ExtSecurity, FALSE) ||
!freerdp_settings_set_bool(settings, FreeRDP_NlaSecurity, TRUE) ||
!freerdp_settings_set_bool(settings, FreeRDP_TlsSecurity, TRUE) ||

2
libfreerdp/core/test/settings_property_lists.h
View File

@ -3,6 +3,7 @@
#define have_bool_list_indices
static const size_t bool_list_indices[] = {
FreeRDP_AadSecurity,
FreeRDP_AllowCacheWaitingList,
FreeRDP_AllowDesktopComposition,
FreeRDP_AllowFontSmoothing,
@ -117,6 +118,7 @@ static const size_t bool_list_indices[] = {
FreeRDP_PrintReconnectCookie,
FreeRDP_PromptForCredentials,
FreeRDP_RdpSecurity,
FreeRDP_RdstlsSecurity,
FreeRDP_RedirectClipboard,
FreeRDP_RedirectDrives,
FreeRDP_RedirectHomeDrive,

119
libfreerdp/core/transport.c
View File

@ -74,6 +74,7 @@ struct rdp_transport
HANDLE connectedEvent;
BOOL NlaMode;
BOOL RdstlsMode;
BOOL AadMode;
BOOL blocking;
BOOL GatewayEnabled;
CRITICAL_SECTION ReadLock;
@ -402,6 +403,50 @@ fail:
return rc;
}
BOOL transport_connect_aad(rdpTransport* transport)
{
rdpContext* context = NULL;
rdpSettings* settings = NULL;
rdpRdp* rdp = NULL;
if (!transport)
return FALSE;
context = transport_get_context(transport);
WINPR_ASSERT(context);
settings = context->settings;
WINPR_ASSERT(settings);
rdp = context->rdp;
WINPR_ASSERT(rdp);
if (!transport_connect_tls(transport))
return FALSE;
if (!settings->Authentication)
return TRUE;
aad_free(rdp->aad);
rdp->aad = aad_new(context, transport);
if (!rdp->aad)
return FALSE;
transport_set_aad_mode(transport, TRUE);
if (aad_client_begin(rdp->aad) < 0)
{
WLog_Print(transport->log, WLOG_ERROR, "AAD begin failed");
freerdp_set_last_error_if_not(context, FREERDP_ERROR_AUTHENTICATION_FAILED);
transport_set_aad_mode(transport, FALSE);
return FALSE;
}
return rdp_client_transition_to_state(rdp, CONNECTION_STATE_AAD);
}
BOOL transport_connect(rdpTransport* transport, const char* hostname, UINT16 port, DWORD timeout)
{
int sockfd;
@ -938,39 +983,61 @@ static int transport_default_read_pdu(rdpTransport* transport, wStream* s)
WINPR_ASSERT(transport);
WINPR_ASSERT(s);
/* Read in pdu length */
status = transport_parse_pdu(transport, s, &incomplete);
while ((status == 0) && incomplete)
/* RDS AAD Auth PDUs have no length indicator. We need to determine the end of the PDU by
* reading in one byte at a time until we encounter the terminating null byte */
if (transport->AadMode)
{
BYTE c;
int rc;
if (!Stream_EnsureRemainingCapacity(s, 1))
return -1;
rc = transport_read_layer_bytes(transport, s, 1);
if (rc != 1)
return rc;
status = transport_parse_pdu(transport, s, &incomplete);
while (1)
{
rc = transport_read_layer(transport, &c, 1);
if (rc != 1)
return rc;
if (!Stream_EnsureRemainingCapacity(s, 1))
return -1;
Stream_Write(s, &c, 1);
if (c == 0)
break;
}
}
else
{
/* Read in pdu length */
status = transport_parse_pdu(transport, s, &incomplete);
while ((status == 0) && incomplete)
{
int rc;
if (!Stream_EnsureRemainingCapacity(s, 1))
return -1;
rc = transport_read_layer_bytes(transport, s, 1);
if (rc != 1)
return rc;
status = transport_parse_pdu(transport, s, &incomplete);
}
if (status < 0)
return -1;
if (status < 0)
return -1;
pduLength = (size_t)status;
pduLength = (size_t)status;
/* Read in rest of the PDU */
if (!Stream_EnsureCapacity(s, pduLength))
return -1;
/* Read in rest of the PDU */
if (!Stream_EnsureCapacity(s, pduLength))
return -1;
position = Stream_GetPosition(s);
if (position > pduLength)
return -1;
position = Stream_GetPosition(s);
if (position > pduLength)
return -1;
status = transport_read_layer_bytes(transport, s, pduLength - Stream_GetPosition(s));
status = transport_read_layer_bytes(transport, s, pduLength - Stream_GetPosition(s));
if (status != 1)
return status;
if (status != 1)
return status;
if (Stream_GetPosition(s) >= pduLength)
WLog_Packet(transport->log, WLOG_TRACE, Stream_Buffer(s), pduLength, WLOG_PACKET_INBOUND);
if (Stream_GetPosition(s) >= pduLength)
WLog_Packet(transport->log, WLOG_TRACE, Stream_Buffer(s), pduLength,
WLOG_PACKET_INBOUND);
}
Stream_SealLength(s);
Stream_SetPosition(s, 0);
@ -1323,6 +1390,12 @@ void transport_set_rdstls_mode(rdpTransport* transport, BOOL RdstlsMode)
transport->RdstlsMode = RdstlsMode;
}
void transport_set_aad_mode(rdpTransport* transport, BOOL AadMode)
{
WINPR_ASSERT(transport);
transport->AadMode = AadMode;
}
BOOL transport_disconnect(rdpTransport* transport)
{
if (!transport)

2
libfreerdp/core/transport.h
View File

@ -63,6 +63,7 @@ FREERDP_LOCAL BOOL transport_connect_rdp(rdpTransport* transport);
FREERDP_LOCAL BOOL transport_connect_tls(rdpTransport* transport);
FREERDP_LOCAL BOOL transport_connect_nla(rdpTransport* transport);
FREERDP_LOCAL BOOL transport_connect_rdstls(rdpTransport* transport);
FREERDP_LOCAL BOOL transport_connect_aad(rdpTransport* transport);
FREERDP_LOCAL BOOL transport_accept_rdp(rdpTransport* transport);
FREERDP_LOCAL BOOL transport_accept_tls(rdpTransport* transport);
FREERDP_LOCAL BOOL transport_accept_nla(rdpTransport* transport);
@ -84,6 +85,7 @@ FREERDP_LOCAL BOOL transport_set_blocking_mode(rdpTransport* transport, BOOL blo
FREERDP_LOCAL void transport_set_gateway_enabled(rdpTransport* transport, BOOL GatewayEnabled);
FREERDP_LOCAL void transport_set_nla_mode(rdpTransport* transport, BOOL NlaMode);
FREERDP_LOCAL void transport_set_rdstls_mode(rdpTransport* transport, BOOL RdstlsMode);
FREERDP_LOCAL void transport_set_aad_mode(rdpTransport* transport, BOOL AadMode);
FREERDP_LOCAL BOOL transport_is_write_blocked(rdpTransport* transport);
FREERDP_LOCAL int transport_drain_output_buffer(rdpTransport* transport);