Skip to content

UDEB (.udeb)

.udeb file signature | application/x-debian-package

Safe

Magic Bytes

Offset 0
21 3C 61 72 63 68 3E 0A 64 65 62 69 61 6E 2D 62 69 6E 61 72 79

Sources: Apache Tika

All Known Signatures

2 signature variants are documented for .udeb files across multiple sources.

Hex Signature Offset Sources
21 3C 61 72 63 68 3E 0A 64 65 62 69 61 6E 2D 62 69 6E 61 72 79 0 Apache Tika
21 3C 61 72 63 68 3E 0A 64 65 62 69 61 6E 2D 73 70 6C 69 74 0 Apache Tika

Extension

.udeb

MIME Type

application/x-debian-package

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .udeb files in Python

Python 
def is_udeb(file_path: str) -> bool:
    """Check if file is a valid UDEB by magic bytes."""
    signature = bytes([0x21, 0x3C, 0x61, 0x72, 0x63, 0x68, 0x3E, 0x0A, 0x64, 0x65, 0x62, 0x69, 0x61, 0x6E, 0x2D, 0x62, 0x69, 0x6E, 0x61, 0x72, 0x79])
    with open(file_path, "rb") as f:
        return f.read(21) == signature

How to validate .udeb files in Node.js

Node.js 
function isUDEB(buffer: Buffer): boolean {
  const signature = Buffer.from([0x21, 0x3C, 0x61, 0x72, 0x63, 0x68, 0x3E, 0x0A, 0x64, 0x65, 0x62, 0x69, 0x61, 0x6E, 0x2D, 0x62, 0x69, 0x6E, 0x61, 0x72, 0x79]);
  return buffer.subarray(0, 21).equals(signature);
}

How to validate .udeb files in Go

Go 
func IsUDEB(data []byte) bool {
    signature := []byte{0x21, 0x3C, 0x61, 0x72, 0x63, 0x68, 0x3E, 0x0A, 0x64, 0x65, 0x62, 0x69, 0x61, 0x6E, 0x2D, 0x62, 0x69, 0x6E, 0x61, 0x72, 0x79}
    if len(data) < 21 {
        return false
    }
    return bytes.Equal(data[:21], signature)
}

API Endpoint

GET /api/v1/udeb
curl https://filesignature.org/api/v1/udeb

See the full API documentation for all endpoints and parameters.

Frequently Asked Questions

What is a .udeb file?

A .udeb file is a UDEB file.

What are the magic bytes for .udeb files?

The magic bytes for UDEB files are 21 3C 61 72 63 68 3E 0A 64 65 62 69 61 6E 2D 62 69 6E 61 72 79 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .udeb file?

To validate a .udeb file, read the first bytes of the file and compare them against the known magic bytes (21 3C 61 72 63 68 3E 0A 64 65 62 69 61 6E 2D 62 69 6E 61 72 79) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .udeb files?

The primary MIME type for .udeb files is application/x-debian-package.

Is it safe to open .udeb files?

UDEB (.udeb) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.