client/common: start parsing of .msrcIncident Remote Assistance file
This commit is contained in:
Marc-André Moreau
parent
f1a866340e
commit
f6b6c1188b
@ -28,6 +28,7 @@ endif()
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set(${MODULE_PREFIX}_SRCS
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client.c
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cmdline.c
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assistance.c
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compatibility.c
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compatibility.h
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file.c)
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@ -52,6 +53,9 @@ set_target_properties(${MODULE_NAME} PROPERTIES VERSION ${FREERDP_VERSION} SOVER
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set(${MODULE_PREFIX}_LIBS ${${MODULE_PREFIX}_LIBS}
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${FREERDP_CHANNELS_CLIENT_LIBS})
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set(${MODULE_PREFIX}_LIBS ${${MODULE_PREFIX}_LIBS}
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${OPENSSL_LIBRARIES} ${ZLIB_LIBRARIES})
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set_complex_link_libraries(VARIABLE ${MODULE_PREFIX}_LIBS MONOLITHIC ${MONOLITHIC_BUILD}
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MODULE freerdp
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MODULES freerdp-core)
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@ -60,8 +64,6 @@ set_complex_link_libraries(VARIABLE ${MODULE_PREFIX}_LIBS MONOLITHIC ${MONOLITHI
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MODULE winpr
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MODULES winpr-crt winpr-utils)
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target_link_libraries(${MODULE_NAME} ${${MODULE_PREFIX}_LIBS})
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install(TARGETS ${MODULE_NAME} DESTINATION ${CMAKE_INSTALL_LIBDIR} COMPONENT libraries EXPORT FreeRDPTargets)
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443
client/common/assistance.c
Normal file
443
client/common/assistance.c
Normal file
@ -0,0 +1,443 @@
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/**
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* FreeRDP: A Remote Desktop Protocol Implementation
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* Remote Assistance
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*
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* Copyright 2014 Marc-Andre Moreau <marcandre.moreau@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 <winpr/crt.h>
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#include <winpr/windows.h>
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#include <openssl/ssl.h>
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#include <openssl/md5.h>
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#include <openssl/rc4.h>
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#include <openssl/sha.h>
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#include <openssl/evp.h>
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#include <openssl/aes.h>
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#include <openssl/rand.h>
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#include <openssl/engine.h>
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#include <freerdp/client/file.h>
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#include <freerdp/client/cmdline.h>
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#include <freerdp/client/assistance.h>
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/**
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* CryptDeriveKey Function:
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* http://msdn.microsoft.com/en-us/library/windows/desktop/aa379916/
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*
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* Let n be the required derived key length, in bytes.
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* The derived key is the first n bytes of the hash value after the hash computation
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* has been completed by CryptDeriveKey. If the hash is not a member of the SHA-2
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* family and the required key is for either 3DES or AES, the key is derived as follows:
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*
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* Form a 64-byte buffer by repeating the constant 0x36 64 times.
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* Let k be the length of the hash value that is represented by the input parameter hBaseData.
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* Set the first k bytes of the buffer to the result of an XOR operation of the first k bytes
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* of the buffer with the hash value that is represented by the input parameter hBaseData.
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*
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* Form a 64-byte buffer by repeating the constant 0x5C 64 times.
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* Set the first k bytes of the buffer to the result of an XOR operation of the first k bytes
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* of the buffer with the hash value that is represented by the input parameter hBaseData.
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*
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* Hash the result of step 1 by using the same hash algorithm as that used to compute the hash
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* value that is represented by the hBaseData parameter.
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*
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* Hash the result of step 2 by using the same hash algorithm as that used to compute the hash
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* value that is represented by the hBaseData parameter.
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*
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* Concatenate the result of step 3 with the result of step 4.
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* Use the first n bytes of the result of step 5 as the derived key.
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*/
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int freerdp_client_assistance_crypt_derive_key(BYTE* hash, int hashLength, BYTE* key, int keyLength)
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{
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int i;
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BYTE* bufferHash;
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BYTE buffer36[64];
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BYTE buffer5c[64];
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memset(buffer36, 0x36, sizeof(buffer36));
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memset(buffer5c, 0x5C, sizeof(buffer5c));
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for (i = 0; i < hashLength; i++)
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{
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buffer36[i] ^= hash[i];
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buffer5c[i] ^= hash[i];
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}
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bufferHash = (BYTE*) calloc(1, hashLength * 2);
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if (!bufferHash)
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return -1;
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SHA1(buffer36, 64, bufferHash);
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SHA1(buffer5c, 64, &bufferHash[hashLength]);
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CopyMemory(key, bufferHash, keyLength);
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free(bufferHash);
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return 1;
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}
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int freerdp_client_assistance_decrypt(rdpAssistanceFile* file, const char* password)
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{
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int status;
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SHA_CTX shaCtx;
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int cbOut, cbFinal;
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EVP_CIPHER_CTX aesDec;
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WCHAR* PasswordW = NULL;
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BYTE EncryptionKey[AES_BLOCK_SIZE];
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BYTE PasswordHash[SHA_DIGEST_LENGTH];
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status = ConvertToUnicode(CP_UTF8, 0, password, -1, &PasswordW, 0);
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if (status <= 0)
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return -1;
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SHA_Init(&shaCtx);
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SHA_Update(&shaCtx, PasswordW, status * 2);
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SHA_Final((void*) PasswordHash, &shaCtx);
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status = freerdp_client_assistance_crypt_derive_key(PasswordHash, sizeof(PasswordHash),
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EncryptionKey, sizeof(EncryptionKey));
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if (status < 0)
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return -1;
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EVP_CIPHER_CTX_init(&aesDec);
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status = EVP_DecryptInit(&aesDec, EVP_aes_128_cbc(), EncryptionKey, NULL);
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if (status != 1)
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return -1;
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cbOut = file->EncryptedConnectionStringLength;
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file->ConnectionString = (char*) calloc(1, cbOut);
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if (!file->ConnectionString)
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return -1;
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status = EVP_DecryptUpdate(&aesDec, (BYTE*) file->ConnectionString, &cbOut,
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(BYTE*) file->EncryptedConnectionString, file->EncryptedConnectionStringLength);
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if (status != 1)
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return -1;
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status = EVP_DecryptFinal(&aesDec, (BYTE*) &file->ConnectionString[cbOut], &cbFinal);
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/* FIXME: still fails */
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if (status != 1)
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return -1;
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return 1;
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}
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BYTE* freerdp_client_assistance_parse_hex_string(const char* hexStr, int* size)
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{
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char c;
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int length;
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BYTE* buffer;
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int i, ln, hn;
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length = strlen(hexStr);
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if ((length % 2) != 0)
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return NULL;
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length /= 2;
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*size = length;
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buffer = (BYTE*) malloc(length);
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if (!buffer)
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return NULL;
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for (i = 0; i < length; i++)
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{
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hn = ln = 0;
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c = hexStr[(i * 2) + 0];
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if ((c >= '0') && (c <= '9'))
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hn = c - '0';
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else if ((c >= 'a') && (c <= 'f'))
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hn = (c - 'a') + 10;
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else if ((c >= 'A') && (c <= 'F'))
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hn = (c - 'A') + 10;
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c = hexStr[(i * 2) + 1];
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if ((c >= '0') && (c <= '9'))
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ln = c - '0';
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else if ((c >= 'a') && (c <= 'f'))
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ln = (c - 'a') + 10;
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else if ((c >= 'A') && (c <= 'F'))
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ln = (c - 'A') + 10;
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buffer[i] = (hn << 4) | ln;
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}
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return buffer;
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}
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int freerdp_client_assistance_parse_file_buffer(rdpAssistanceFile* file, const char* buffer, size_t size)
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{
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char* p;
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char* q;
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char* r;
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int value;
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size_t length;
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p = strstr(buffer, "UPLOADINFO");
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if (!p)
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return -1;
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p = strstr(p + sizeof("UPLOADINFO") - 1, "TYPE=\"");
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if (!p)
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return -1;
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p = strstr(buffer, "UPLOADDATA");
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if (!p)
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return -1;
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/* Parse USERNAME */
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p = strstr(buffer, "USERNAME=\"");
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if (p)
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{
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p += sizeof("USERNAME=\"") - 1;
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q = strchr(p, '"');
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if (!q)
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return -1;
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length = q - p;
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file->Username = (char*) malloc(length + 1);
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if (!file->Username)
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return -1;
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CopyMemory(file->Username, p, length);
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file->Username[length] = '\0';
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}
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/* Parse LHTICKET */
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p = strstr(buffer, "LHTICKET=\"");
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if (p)
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{
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p += sizeof("LHTICKET=\"") - 1;
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q = strchr(p, '"');
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if (!q)
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return -1;
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length = q - p;
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file->LHTicket = (char*) malloc(length + 1);
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if (!file->LHTicket)
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return -1;
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CopyMemory(file->LHTicket, p, length);
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file->LHTicket[length] = '\0';
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}
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/* Parse RCTICKET */
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p = strstr(buffer, "RCTICKET=\"");
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if (p)
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{
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p += sizeof("RCTICKET=\"") - 1;
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q = strchr(p, '"');
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if (!q)
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return -1;
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length = q - p;
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file->RCTicket = (char*) malloc(length + 1);
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if (!file->RCTicket)
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return -1;
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CopyMemory(file->RCTicket, p, length);
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file->RCTicket[length] = '\0';
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}
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/* Parse RCTICKETENCRYPTED */
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p = strstr(buffer, "RCTICKETENCRYPTED=\"");
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if (p)
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{
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p += sizeof("RCTICKETENCRYPTED=\"") - 1;
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q = strchr(p, '"');
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if (!q)
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return -1;
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length = q - p;
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if ((length == 1) && (p[0] == '1'))
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file->RCTicketEncrypted = TRUE;
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}
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/* Parse PassStub */
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p = strstr(buffer, "PassStub=\"");
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if (p)
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{
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p += sizeof("PassStub=\"") - 1;
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q = strchr(p, '"');
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if (!q)
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return -1;
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length = q - p;
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file->PassStub = (char*) malloc(length + 1);
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if (!file->PassStub)
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return -1;
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CopyMemory(file->PassStub, p, length);
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file->PassStub[length] = '\0';
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}
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/* Parse DtStart */
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p = strstr(buffer, "DtStart=\"");
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if (p)
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{
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p += sizeof("DtStart=\"") - 1;
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q = strchr(p, '"');
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if (!q)
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return -1;
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length = q - p;
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r = (char*) malloc(length + 1);
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if (!r)
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return -1;
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CopyMemory(r, p, length);
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r[length] = '\0';
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value = atoi(r);
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free(r);
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if (value < 0)
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return -1;
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file->DtStart = (UINT32) value;
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}
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/* Parse DtLength */
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p = strstr(buffer, "DtLength=\"");
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if (p)
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{
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p += sizeof("DtLength=\"") - 1;
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q = strchr(p, '"');
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if (!q)
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return -1;
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length = q - p;
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r = (char*) malloc(length + 1);
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if (!r)
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return -1;
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CopyMemory(r, p, length);
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r[length] = '\0';
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value = atoi(r);
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free(r);
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if (value < 0)
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return -1;
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file->DtLength = (UINT32) value;
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}
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/* Parse L (LowSpeed) */
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p = strstr(buffer, " L=\"");
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if (p)
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{
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p += sizeof(" L=\"") - 1;
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q = strchr(p, '"');
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if (!q)
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return -1;
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length = q - p;
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if ((length == 1) && (p[0] == '1'))
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file->LowSpeed = TRUE;
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}
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file->EncryptedConnectionString = freerdp_client_assistance_parse_hex_string(file->LHTicket,
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&file->EncryptedConnectionStringLength);
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return 1;
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}
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rdpAssistanceFile* freerdp_client_assistance_file_new()
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{
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rdpAssistanceFile* file;
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file = (rdpAssistanceFile*) calloc(1, sizeof(rdpAssistanceFile));
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if (file)
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{
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}
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return file;
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}
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void freerdp_client_assistance_file_free(rdpAssistanceFile* file)
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{
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if (!file)
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return;
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free(file->Username);
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free(file->LHTicket);
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free(file->RCTicket);
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free(file->PassStub);
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free(file->ConnectionString);
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free(file->EncryptedConnectionString);
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free(file);
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}
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@ -6,7 +6,8 @@ set(${MODULE_PREFIX}_DRIVER ${MODULE_NAME}.c)
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set(${MODULE_PREFIX}_TESTS
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TestClientRdpFile.c
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TestClientChannels.c)
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TestClientChannels.c
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TestClientAssistance.c)
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create_test_sourcelist(${MODULE_PREFIX}_SRCS
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${${MODULE_PREFIX}_DRIVER}
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77
client/common/test/TestClientAssistance.c
Normal file
77
client/common/test/TestClientAssistance.c
Normal file
@ -0,0 +1,77 @@
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#include <winpr/crt.h>
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#include <winpr/print.h>
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#include <freerdp/client/assistance.h>
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const char* TEST_MSRC_INCIDENT_PASSWORD = "48BJQ853X3B4";
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static const char* TEST_MSRC_INCIDENT_FILE =
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"<?xml version=\"1.0\"?>"
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"<UPLOADINFO TYPE=\"Escalated\">"
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"<UPLOADDATA USERNAME=\"awake\" "
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"LHTICKET=\""
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"20FCC407AA53E95F8505AB56D485D26835064B03AF86CDA326248FD304626AD4"
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"DBDBDFFE0C473228EFFF7A1E6CEB445BBEC429294BB6616BBB600854438DDFB5"
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"82FC377CF65A2060EB3221647643C9B29BF5EC320856180B34D1BE9827A528C7"
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"E8F0DCD53C8D38F974160FEE317458FAC9DBDBA7B972D21DF3BC5B1AF0E01878"
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"65F07A3B915618C03E6EAF843FC1185770A1208C29C836DBCA5A040CB276D3C4"
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"1DDE2FA8CA9627E5E74FA750A92C0E01AD6C3D1000A5B1479DEB899BF5BCD402"
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"CE3BB3BF104CE0286C3F985AA711943C88C5EEEEE86F35B63F68883A90ADBCFD"
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"CBBAE3EAB993EFD9148E1A21D092CE9498695943946236D65D20B4A38D724C61"
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"72319E38E19C04E98EBC03F56A4A190E971F8EAEBFE6B415A3A2D8F35F7BF785"
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"26B9BFAAB48D11BDD6C905EFE503D2265678E1EAD2F2F124E570667F04103180"
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"2F63587276C14E6A5AB436CE234F722CE7C9B5D244508F14C012E84A49FE6992"
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"3F30320ABB3641F1EFA66205F3EA709E7E1C3E6874BB9642486FB96D2730CDF4"
|
||||
"514AA738167F00FC13B2978AED1D6678413FDF62008B03DD729E36173BE02742"
|
||||
"B69CAD44938512D0F56335394759338AF6ADBCF39CE829116D97435085D05BB5"
|
||||
"9320A134698050DCDBE01305A6B4712FD6BD48958BD2DC497498FF35CAECC9A8"
|
||||
"2C97FD1A5B5EC4BAF5FFB75A1471B765C465B35A7C950019066BB219B391C6E9"
|
||||
"8AE8FD2038E774F36F226D9FB9A38BCC313785612165D1EF69D19E2B9CF6E0F7"
|
||||
"FE1ECCF00AB81F9E8B626363CA82FAC719A3B7D243325C9D6042B2488EC95B80"
|
||||
"A31273FF9B72FBBB86F946E6D3DF8816BE4533F0B547C8BC028309EA9784C1E6\" "
|
||||
"RCTICKET=\"65538,1,192.168.1.200:49230;169.254.6.170:49231,*,"
|
||||
"+ULZ6ifjoCa6cGPMLQiGHRPwkg6VyJqGwxMnO6GcelwUh9a6/FBq3It5ADSndmLL,"
|
||||
"*,*,BNRjdu97DyczQSRuMRrDWoue+HA=\" "
|
||||
"PassStub=\"WB^6HsrIaFmEpi\" "
|
||||
"RCTICKETENCRYPTED=\"1\" "
|
||||
"DtStart=\"1403972263\" "
|
||||
"DtLength=\"14400\" "
|
||||
"L=\"0\"/>"
|
||||
"</UPLOADINFO>";
|
||||
|
||||
int TestClientAssistance(int argc, char* argv[])
|
||||
{
|
||||
int status;
|
||||
rdpAssistanceFile* file;
|
||||
|
||||
file = freerdp_client_assistance_file_new();
|
||||
|
||||
status = freerdp_client_assistance_parse_file_buffer(file, TEST_MSRC_INCIDENT_FILE, sizeof(TEST_MSRC_INCIDENT_FILE));
|
||||
|
||||
printf("freerdp_client_assistance_parse_file_buffer: %d\n", status);
|
||||
|
||||
if (status < 0)
|
||||
return -1;
|
||||
|
||||
printf("Username: %s\n", file->Username);
|
||||
printf("LHTicket: %s\n", file->LHTicket);
|
||||
printf("RCTicket: %s\n", file->RCTicket);
|
||||
printf("RCTicketEncrypted: %d\n", file->RCTicketEncrypted);
|
||||
printf("PassStub: %s\n", file->PassStub);
|
||||
printf("DtStart: %d\n", file->DtStart);
|
||||
printf("DtLength: %d\n", file->DtLength);
|
||||
printf("LowSpeed: %d\n", file->LowSpeed);
|
||||
|
||||
status = freerdp_client_assistance_decrypt(file, TEST_MSRC_INCIDENT_PASSWORD);
|
||||
|
||||
printf("freerdp_client_assistance_decrypt: %d\n", status);
|
||||
|
||||
if (status < 0)
|
||||
return -1;
|
||||
|
||||
freerdp_client_assistance_file_free(file);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
59
include/freerdp/client/assistance.h
Normal file
59
include/freerdp/client/assistance.h
Normal file
@ -0,0 +1,59 @@
|
||||
/**
|
||||
* FreeRDP: A Remote Desktop Protocol Implementation
|
||||
* Remote Assistance
|
||||
*
|
||||
* Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.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_CLIENT_ASSISTANCE_H
|
||||
#define FREERDP_CLIENT_ASSISTANCE_H
|
||||
|
||||
#include <freerdp/api.h>
|
||||
#include <freerdp/freerdp.h>
|
||||
|
||||
struct rdp_assistance_file
|
||||
{
|
||||
char* Type;
|
||||
char* Username;
|
||||
char* LHTicket;
|
||||
char* RCTicket;
|
||||
char* PassStub;
|
||||
UINT32 DtStart;
|
||||
UINT32 DtLength;
|
||||
BOOL LowSpeed;
|
||||
BOOL RCTicketEncrypted;
|
||||
|
||||
char* ConnectionString;
|
||||
BYTE* EncryptedConnectionString;
|
||||
int EncryptedConnectionStringLength;
|
||||
};
|
||||
typedef struct rdp_assistance_file rdpAssistanceFile;
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
FREERDP_API int freerdp_client_assistance_parse_file_buffer(rdpAssistanceFile* file, const char* buffer, size_t size);
|
||||
FREERDP_API int freerdp_client_assistance_decrypt(rdpAssistanceFile* file, const char* password);
|
||||
|
||||
FREERDP_API rdpAssistanceFile* freerdp_client_assistance_file_new();
|
||||
FREERDP_API void freerdp_client_assistance_file_free(rdpAssistanceFile* file);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* FREERDP_CLIENT_ASSISTANCE_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user