UVtools/Scripts/010 Editor/ctb_encrypted.bt

//--------------------------------------
//--- 010 Editor v6.0.3 Binary Template
//
// File: ctb
// Author: Tim Slater
// Revision: 1
// Purpose: CTB File Format
//--------------------------------------

struct HEADER {
    uint Magic <fgcolor=cBlack, bgcolor=cRed>;
    uint EncryptedHeaderSize <fgcolor=cBlack, bgcolor=cRed>;
    uint EncryptedHeaderOffset <fgcolor=cBlack, bgcolor=cRed>;
    uint unknown1;
    uint unknown2;
    uint SignatureSize <fgcolor=cBlack, bgcolor=cRed>;
    uint SignatureOffset <fgcolor=cBlack, bgcolor=cRed>;
    uint unknown3;
    ushort unknown4;
    ushort unknown5;
    uint unknown6;
    uint unknown7;
    uint unknown9;
} header;

FSeek(header.EncryptedHeaderOffset);
ubyte encryptedHeader[header.EncryptedHeaderSize];

struct PREVIEW {
    uint ResolutionX <fgcolor=cBlack, bgcolor=cRed>;
    uint ResolutionY <fgcolor=cBlack, bgcolor=cRed>;
    uint ImageOffset <fgcolor=cBlack, bgcolor=cRed>;
    uint ImageLength <fgcolor=cBlack, bgcolor=cRed>;

    byte Data[ImageLength] <fgcolor=cBlack, bgcolor=cGreen>;
} LargePreview;

PREVIEW SmallPreview;

local ushort machineNameLength = 1;
while (ReadString(FTell()+machineNameLength, 17 ) != "Layout and record") {
    machineNameLength++;
    if(machineNameLength > 255) return;
}

char MachineName[machineNameLength] <fgcolor=cBlack, bgcolor=cYellow>;

char Disclaimer[320] <fgcolor=cBlack, bgcolor=cPurple>;

/* need to walk the layer index table to get a count of them.
   the actual count field is in the encrypted header */
local uint curOffset = FTell();
local uint finalOffset;

while (true) {
    uint a <hidden=true>;
    uint b <hidden=true>;
    uint c <hidden=true>; 
    uint d <hidden=true>;
    if (a == 88) {
        break;
    }
}
FSkip(-16);
finalOffset = FTell();
local uint tableSize = finalOffset - curOffset;
local uint layerCount = tableSize / 16;

FSeek(curOffset);

struct LAYER_POINTER {
    uint Offset <format=hex>;
    uint PageNumber;
    uint LayerTableSize;
    uint Padding2;
} layerPointers[layerCount];

struct LAYER_HEADER{
    uint LayerMarker <hidden=true>;
    float PositionZ;
    float ExposureTime;
    float LightOffDelay;
    uint LayerDataOffset;
    uint PageNumber;
    uint LayerDataLength;
    uint Unknown;
    uint EncryptedDataOffset;
    uint EncryptedDataLength;
    float LiftHeight;
    float LiftSpeed;
    float LiftHeight2;
    float LiftSpeed2;
    float RetractSpeed;
    float RetractHeight2;
    float RetractSpeed2;
    float RestTimeBeforeLift;
    float RestTimeAfterLift;
    float RestTimeAfterRetract;
    float LightPWM; /* just a guess, has value 255 as a float */
    uint unknown6;
};

struct LAYER {
    LAYER_HEADER layerHeader;
    FSeek(layerHeader.PageNumber * 4294967296 + layerHeader.LayerDataOffset);

    /* do we have encrypted data? */
    if (layerHeader.EncryptedDataLength > 0) {

        if (layerHeader.EncryptedDataOffset > 0) {
            ubyte normalLayerData1[layerHeader.EncryptedDataOffset];
            ubyte encrytedLayerData[layerHeader.EncryptedDataLength];
            ubyte normalLayerData2[layerHeader.LayerDataLength - (layerHeader.EncryptedDataOffset + layerHeader.EncryptedDataLength)];
        } else {
            ubyte encrytedLayerData[layerHeader.EncryptedDataLength];
            ubyte normalLayerData[layerHeader.LayerDataLength - layerHeader.EncryptedDataLength];
        }

    } else {
        ubyte layerData[layerHeader.LayerDataLength] <format=binary>;
    }
};

struct LAYERS {
    local uint x;
    for(x = 0; x < layerCount; x++) {
        FSeek(layerPointers[x].PageNumber * 4294967296 + layerPointers[x].Offset);
        LAYER layer;
    }
} layers;

ubyte Sha256Hash[0x20]<format=hex>;