Graphics Multipage PCX bitmap file
image/vnd.zbrush.dcx
Magic Bytes
Offset: 0
B1 68 DE 3A
The Graphics Multipage PCX (DCX) format is a bitmap image container developed by ZSoft Corporation as an extension of the PC Paintbrush (PCX) format. It was primarily designed to store multiple PCX images within a single file for use in digital fax transmissions and early document management systems. Although now largely obsolete and superseded by TIFF and PDF, the format remains a low-risk legacy standard with minimal security vulnerabilities.
Validation Code
How to validate .dcx files in Python
Python
def is_dcx(file_path: str) -> bool:
"""Check if file is a valid DCX by magic bytes."""
signature = bytes([0xB1, 0x68, 0xDE, 0x3A])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .dcx files in Node.js
Node.js
function isDCX(buffer: Buffer): boolean {
const signature = Buffer.from([0xB1, 0x68, 0xDE, 0x3A]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsDCX(data []byte) bool {
signature := []byte{0xB1, 0x68, 0xDE, 0x3A}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/dcx
curl https://filesignature.org/api/v1/dcx