public static PRE_KEY GenKey( String pk1 , String pk2 , String sk1 , String sk2 )
{
PRE_KEY key = new PRE_KEY();
key.PK = new PRE_PK();
key.SK = new PRE_SK();
key.PK.PK1 = pk1;
key.PK.PK2 = pk2;
key.SK.X1 = sk1;
key.SK.X2 = sk2;
return key;
}
public Boolean DownloadSharingFile(Protocal.SharingInfo si)
{
String copyRef = si.Reference;
String fileName = si.FileName;
try
{
String dropboxPath = BaseExtension.FileStringHelper.GetNonConflictFileName( Path.Combine( DropBoxController.DropBox_DownloadFolder , fileName ) );
UserKey uk = PreKeyring.UserKey;
PRE_KEY userKey = new PRE_KEY();
userKey.PK.PK1 = uk.PK1;
userKey.PK.PK2 = uk.PK2;
userKey.SK.X1 = uk.SK1;
userKey.SK.X2 = uk.SK2;
PRE_Cipher CKey = new PRE_Cipher();
CKey.E = si.CKey_E;
CKey.F = si.CKey_F;
CKey.U = si.CKey_U;
CKey.W = si.CKey_W;
String key = ProxyReEncryption.KeyDecrypt( userKey , CKey );
FileMetaData fi = new FileMetaData();
fi.FileName = fileName;
fi.FilePath = this.dropBoxController.DropboxSecuruStikFolder2SecuruStikFolder( dropboxPath );
fi.Key = key;
fi.PlainTextHash = "";
fi.CryptTextHash = "";
PreKeyring.FileInfo_Update( fi );
String dropboxRemotePath = this.dropBoxController.SecuruStikFolder2RemoteDropboxPath( fi.FilePath );
this.dropBoxController.CopyAsync( copyRef , dropboxRemotePath );
}
catch ( System.Exception ex )
{
log.ErrorFormat("DownloadSharingFile {0}", si.FileName, ex);
PreKeyring.SharingFile_Delete( si.Reference );
return false;
}
return true;
}
public static PRE_Cipher KeyEncrypt( PRE_KEY key1 , PRE_PK key2_pk , String m )
{
IntPtr pKey1 = ProxyReEncryption.KeyStr2KeyPtr( key1 );
IntPtr pPk2 = ProxyReEncryption.PKStr2PKPtr( key2_pk );
IntPtr C = KeyEncrypt( pKey1 , pPk2 , m );
PRE_Cipher CC = CipherPtr2CipherStr( C );
return CC;
}
private static IntPtr KeyStr2KeyPtr( PRE_KEY key )
{
PRE_ptrPK ptrPK = new PRE_ptrPK { pk1 = Marshal.StringToHGlobalAnsi( key.PK.PK1 ) , pk2 = Marshal.StringToHGlobalAnsi( key.PK.PK2 ) };
IntPtr pPk = Marshal.AllocHGlobal( Marshal.SizeOf( ptrPK ) );
Marshal.StructureToPtr( ptrPK , pPk , true );
PRE_ptrSK ptrSK = new PRE_ptrSK { x1 = Marshal.StringToHGlobalAnsi( key.SK.X1 ) , x2 = Marshal.StringToHGlobalAnsi( key.SK.X2 ) };
IntPtr pSk = Marshal.AllocHGlobal( Marshal.SizeOf( ptrSK ) );
Marshal.StructureToPtr( ptrSK , pSk , true );
PRE_ptrKEY keyPtr = new PRE_ptrKEY { pk = pPk , sk = pSk };
IntPtr pKey = Marshal.AllocHGlobal( Marshal.SizeOf( keyPtr ) );
Marshal.StructureToPtr( keyPtr , pKey , true );
return pKey;
}
public static String KeyDecrypt( PRE_KEY key2 , PRE_Cipher CC )
{
IntPtr pKey2 = KeyStr2KeyPtr( key2 );
IntPtr C = CipherStr2CipherPtr( CC );
return KeyDecrypt( pKey2 , C );
}
