DXB
image/vnd.dxb
Magic Bytes
Offset: 0
41 75 74 6F 43 41 44 20 44 58 42 20 31 2E 30 0D 0A 30 78 31 41 30 30
Drawing Interchange Binary (DXB) is a specialized binary vector file format developed and maintained by Autodesk for its AutoCAD software. This format is primarily used to compress drawing data or to flatten complex three-dimensional wireframe models into simplified two-dimensional projections for plotting and data transfer. As a legacy format largely superseded by modern standards, it contains basic geometric primitives and presents minimal security risk compared to formats capable of executing scripts or macros.
Validation Code
How to validate .dxb files in Python
Python
def is_dxb(file_path: str) -> bool:
"""Check if file is a valid DXB by magic bytes."""
signature = bytes([0x41, 0x75, 0x74, 0x6F, 0x43, 0x41, 0x44, 0x20, 0x44, 0x58, 0x42, 0x20, 0x31, 0x2E, 0x30, 0x0D, 0x0A, 0x30, 0x78, 0x31, 0x41, 0x30, 0x30])
with open(file_path, "rb") as f:
return f.read(23) == signatureHow to validate .dxb files in Node.js
Node.js
function isDXB(buffer: Buffer): boolean {
const signature = Buffer.from([0x41, 0x75, 0x74, 0x6F, 0x43, 0x41, 0x44, 0x20, 0x44, 0x58, 0x42, 0x20, 0x31, 0x2E, 0x30, 0x0D, 0x0A, 0x30, 0x78, 0x31, 0x41, 0x30, 0x30]);
return buffer.subarray(0, 23).equals(signature);
}
Go
func IsDXB(data []byte) bool {
signature := []byte{0x41, 0x75, 0x74, 0x6F, 0x43, 0x41, 0x44, 0x20, 0x44, 0x58, 0x42, 0x20, 0x31, 0x2E, 0x30, 0x0D, 0x0A, 0x30, 0x78, 0x31, 0x41, 0x30, 0x30}
if len(data) < 23 {
return false
}
return bytes.Equal(data[:23], signature)
}API Endpoint
GET
/api/v1/dxb
curl https://filesignature.org/api/v1/dxb